Title:
Code translator
United States Patent 2139079


Abstract:
This Invention relates to code translating apparatus and electrical circuits, such for example as may be used with code transmitting apparatus for telegraphic or other signalling purposes. This invention is particularly adaptable for use in connection with signal transmitting means, such as...



Inventors:
Haselton, Merton L.
Application Number:
US28347728A
Publication Date:
12/06/1938
Filing Date:
06/07/1928
Assignee:
TELEREGISTER CORP
Primary Class:
Other Classes:
341/99, 345/168
International Classes:
H03M5/00; H04L25/04
View Patent Images:



Description:

This Invention relates to code translating apparatus and electrical circuits, such for example as may be used with code transmitting apparatus for telegraphic or other signalling purposes. This invention is particularly adaptable for use in connection with signal transmitting means, such as disclosed in my copending application Ser. No. 248,069, filed January 20, 1928, now U. S. Patents Nos. 1,890,876, 1,890,877 and 1,946,531, or in the Swiss Patent No. 126,691, dated July 2, 1928, but it will be appreciated that the invention is adaptable for use in many other connections. The objects of this invention include the provision of apparatus and arrangements of the above indicated class, which will be accurate and dependable, as well as very rapid in operation.

Further and more specific objects, features and advantages will more clearly appear from the detailed description given below taken in connection with the accompanying drawings which form a part of this specification.

The invention consists in the novel arrangements, combinations of parts and electrical connections as hereinafter described, but by way of example only, as being illustrative of a preferred embodiment of the invention.

In the drawings, Fig. 1 which extends overtwo sheets (Fig. la and Fig. lb) comprises a schematic diagram of the circuit arrangements of one form of the invention.

Fig. 2 is an enlarged view of a portion of the terminal board forming a part of Fig. 1; Fig. 3 is a detailed sectional view taken on the line 3-3 of Fig. 2; Fig. 4 illustrates additional circuit arrangements which may be incorporated with the circuits of Fig. 1; Figs. 5, 6, 7 and 8 comprise a schematic dia-, gram of the circuit arrangements of one form of transmitter which may be employed with the code translator of Figs. 1 to 4; Fig. 9 is a diagrammatic view of the various keys employed with the circuits disclosed; Fig. 10 is a sectional view illustrating typical selector or actuation keys which may be employed with the transmitter and code translator; Fig. 11 is a sectional view showing the construction of typical stock range keys employed with the transmitter of Figs. 5 to 8; Fig. 12 shows one form of impulse counting device which may be used in connection with the circuits of Figs. 5 to 8; Fig. 13 is a sectional view taken substantially 5p along the line 12-12 of Fig. 11; Figs. 14 and 15 illustrate one form of receiver which may be employed with the transmitter and code translator herein disclosed; and Fig. 16 shows certain details of the contact mechanism referred to in Fig. 14. The arrangement here shown is designed to transpose predetermined arbitrary abbreviations comprising a plurality of letters into a predetermined numerical abbreviation or code system involving the use of a plurality of digits. With the particular apparatus shown in the drawings, for example, abbreviations such as used to designate stocks or commodities, or other items, and comprising one, two or three letters, may be translated into a numerical abbreviation or code system embodying a plurality of digits. An arrangement of this class is desirable for use in connection with transmitting apparatus for controlling automatic brokers' boards and the like, such as referred to in my copending application above mentioned, for the reason that the public and employees of the stock exchanges and financial houses have become accustomed to designating the various listed stocks and commodities by groups of abbreviatiobs or letters of the alphabet, while on the other hand, automatic transmitting apparatus, generally speaking, may be more readily controlled if a numerical and decimal code is used.

However, in the control of automatic brokers' boards and other signalling equipment, it is generally highly important to transmit the information or signals not only with a high degree of accuracy and speed, but also immediately after the occurrence of the events. With the present invention the transmitter or control keyboard may be arranged with the keys designated by letters of the alphabet so that the operators need not take the time necessary, nor otherwise concern themselves with the translation of codes; yet the actual code transmitted over the line wires may be numerical.

In the drawings three groups of operating keys as at 10, 11 and 12 are provided. These keys of course may be suitably grouped together to form a keyboard, as for example according to the general construction disclosed in my copending application above referred to, except that the keys will be designated by letters instead of by numerals. It will be observed that each of the three groups of keys includes one key for each of the twenty-six letters of the alphabet and one key designated (-). Three groups of operating busses are indicated at 13, 14 and II respectively, each group comprising ten wires, one wire being thus provided for each possible number for each decimal or digit character. It will be understood that these operating busses may be connected to control any desired indlcating or transmitting apparatus, a multitude of different control operations or indications being made available merely by applying ground connections to different combinations or groups of busses, such combinations of ground connections being applied by the operation of the relay circuits hereinafter described. For example, the wires 13, 14 and 15 may be connected to operate digit storing relays such as now utilized in the transmitting devices of automatic brokers' board systems and as disclosed in my said copending application, that is, whenever a ground connection is applied to one of these wires, a digit storing relay may be operated in the same manner that the digit storing relays are operated by the units, tens and hundreds selector keys in said copending application.

It will be understood however that the use of the code translator comprising this invention is not restricted to uses with any particular form of transmitting or indicating means.

It will be understood that wires 13, 14 and 16 might also be connected to control other forms of transmiting apparatus well understood from the prior art. Assuming that a stock designated by the abbreviation TAV is to be selected, the operator presses the key T of the group 10, the key A of the group 12, and the key V of the group 11 successively, and the apparatus about to be described functions to translate this abbreviation into a desired predetermined numerical abbreviation such as 822, and accordingly a ground connection is applied momentariy to the eighth wire of the group 13, and also to the second wire of the group 14 and the second wire of the group 15. Thus, in effect, although alphabetical keys have been pressed, the result is equivalent to what might be obtained if an operator mentally translated the abbreviation TAV into the abbreviation 822 and then pressed numerically designated keys, as of my copending application. Similarly, if a stock designated by the letter A is to be selected, then the operator presses the (-) key of group 10, the (-) key of group 12 and the A key of group 11, with the result that the abbreviation A is translated into a predetermined numerical abbreviation, for example, 140, and the ground connection is applied to the first, fourth and tenth wires respectively of the groups 13, 14 and 15.

In brief, the apparatus comprises groups of holding relays as at 16 and 17, one of such relays being provided for each of the keys of the groups 10 and 11, these holding relays being all arranged to be released upon the operation of a release relay 18. Each of the keys of the group 12 is arranged to control a corresponding twenty-eight contact relay as at 19. A grid terminal board is provided at 20 having a number of horizontal busses as at 21 corresponding to the number of keys in the group 10, that is, in this instance twenty-seven, and having twenty-seven vertical busses for each one of the relays 19. These busses are all insulated in respect to each other and are arranged to receive interchangeable readily detachable connections as at 23, each such connection providing for contact with one vertical bus and one horizontal bus at the point where such busses cross. Fig. 2 is an enlarged view of a portion of one of the terminal boards as indicated at 20 in Fig. 1, typical horizontal and vertical busses being indicated at 21 and 41 respectively, the busses being insulated from each other by reason of their spaced apart arrangement. Fig. 3 is an enlarged view of a typical one of the interchangeable readily detachable terminal connections 23 for applying lead wires respectively to the horizontal and vertical busses at the points where the same cross each other.

The two lead wires as at 24 and 25 from each detachable connection 23 may run respectively to relays as at 26 and 27. It will be observed that a pair of relays as at 26 and 27 is provided for each stock or other item to be chosen and such relays may be readily interchanged from time to time in respect to various letter abbreviation combinations, and also in respect to the various numerical combinations. That is, to interchange one of the relays in respect to the letter abbreviations, it is merely necessary to remove the corresponding detachable terminal member 23 from one of the bus intersections on the grid 20 and replace the terminal at another intersection corresponding to the new letter abbreviation which is to be represented by the relay. On the other hand, if it is desired to interchange one of the relays 26 in respect to the numerical abbreviations, the connections to relay contacts as at 45, 46 and 47 may be removed from the particular busses 13, 14 and 15 to which the same are connected, and reconnected to the desired new combination comprising one each of the busses 13, 14 and 15. For example, if it is desired to have relay 57 represent the numeral abbreviation 2-4-0, the lead wires which are shown as running to the 5th, 9th and 6th busses respectively, are removed from these busses and applied respectively to the second bus of group 13, the fourth bus of group 14 and the lowermost bus of group 15. These relays, when actuated, function to momentarily ground certain of the wires 13, 14 and 15, representing the desired numbers, as will be hereinafter further explained.

The operating circuits will now be traced and described in greater detail. Assuming the key of group 10 designated as Z is operated, the first relay 18 will "pick up" through a circuit from ground 28, key switch 29, connection wire 30, coil of relay 61, to battery and ground at 31.

This relay will thereupon close a holding circuit for itself, running from the battery and ground 31, through holding contacts 32 and a circuit connection 33 running to a switch 34 at the release relay 18, and thence to ground 35. Therefore the relay 16 when thus energized, remains energized until release relay 18 opens its holding circuit by reason of the opening of the switch V4.

Yet as will be hereinafter explained, the release relay 18 does not operate until the desired connections have been applied to the bus wires 13, 14 and 15. The holding relay 18 when energized also closes a circuit from the battery and ground 31, through a switch 36, to a circuit connection 37 running to the Z horizontal bus of the grid terminal board 20.

Accordingly, current is applied to this bus and to all the interchangeable connection wires (such as at 24) which may be connected thereto.

While such wires remain energized, the operator presses one of the keys of the group 12. If the A key is thus pressed, the relay 19 (A) will be energized and its holding circuit will be established through circuit connection 33 under control of relay 18 in the same manner as with the circuit connections above described. Also, this relay II serves to connect the group of wires 38 to the selected group A of vertical busses, Fig. lb. The contacts of the relay 19 (A) are normally in open circuit condition, but when closed by the energization of the relay the contacts connect the twenty-seven vertical busses of the group A to the group of relays 17, Fig. la. If the A key of the group of keys I I is pressed, the relay 11 connected thereto will be energized and locked up over its holding circuit, with the result that the 110 vertical bus shown at 40, Fig. lb, will be energized and the relay 21, corresponding to the stock ZAA will be operated, thus operating the associated relay 26 and causing-ground to be applied to conductors 5--1--0 of the busses 13, 14 and IS.

The numerous relays It, 17 and 19 in each case operate in the same manner as above described: The twenty-eighth or last contact as at 19' on 20'each of the relays S1, provides for the establishment of a holding circuit for the corresponding relay, such circuits running from the relay contacts 19' to the connections 33, whereby the release relay 18 controls the release of the relays 19 as well as the holding relays 16 and II.

It will be understood that although connections are shown for but three of the relays 19, namely those designated (-), A and B, the connections may be extended in the manner indi530 cated on the drawings to provide for the entire group of keys 12. Also it will be understood that the keys 10, 11 and 12 might be designated by character systems other than alphabetical systems. For example, one arbitrary numerical ab-, breviation or code system might be translated by the apparatus into another arbitrary or systematic numerical code system, and in that event the groups of keys 10, II and 12 might each include ten or more keys with a corresponding number of associated relays. It will be further understood that if desired, the necessary keys on the keyboard might be pressed simultaneously, thus avoiding the necessity of holding relays.

In the particular example of operation above described, if there is a detachable plug connection applied on the grid terminal board at the intersection of the lower horizontal bus with the vertical bus 40, the connection wires 24 and 25 will be both energized, but this will be the only intersection on the terminal board where both busses will thus become jointly energized, and accordingly the relays 26 and 27 associated with the particular chosen intersection will be operable to the exclusion of the corresponding relays for all other stocks or items. The circuit from the vertical bus 40 may therefore continue through connection wire 25, through the coil of the chosen relay 27, thence to ground return as at 41. The relay 27 thereupon "picks up" and closes a switch 42, which completes the circuit from the horizontal bus through the connection wire 24, switch 42, relay 26, to a ground return at 43. At this moment, relay 26 "picks up" and. acts to momentarily close four contacts as at 44, 45, 46 and 47. The contacts 45, 46 and 47 respectively serve to connect the ground 43 to the desired wires 13, 14 and 15 representative of predetermined digits such as 510, corresponding to the arbitrary abbreviation ZAA. At the same time, the closing of the switch 44 applies the ground 43 to a connection wire 48 running to the release relay 18, and thence, to battery and ground as at 49. The release relay 18 thereupon "picks up", opening its switch 34 and releasing the holding relays 18, 17 and Is as above stated, with a consequent deenergization of the chosen terminal board busses and relays 21 and 27. But meanwhile, the desired wires of the groups II, 14 and 15 will have been momentarily grounded, thus permitting the storing of the desired numerical abbreviation in the storage relays or other transmitting apparatus as above referred to.

With this apparatus it will be observed that any letter abbreviation having one, two or three letters may be translated into any predetermined desired numerical abbreviation from zero to 999, and the particular number abbreviation into which the letter abbreviation is translated may be chosen or changed at will merely by changing the point at which the relays as at 26 and 27 are connected to the interchangeable terminal board.

Furthermore, although a total of 27 x 27 x 27 letter abbreviations may be readily provided for on the keyboard, it is necessary to provide pairs of relays as at 28 and 21 only for such stocks or other items as are actually to be selected, and the number of these relays may be readily increased from time to time as the number of items or other signals to be quoted increases with the .25 extension of business. Also, in certain signalling systems, it will be appreciated that a three letter abbreviation will be unnecessary. In that event, one of the groups of key switches might of course be eliminated. In other cases it may be found unnecessary to ever use certain letters of, say, the group of key switches 12, and in that event such keys need not be accompanied by one of the relays as at 19 and associated connections, and the corresponding terminal board section 3a may also then be eliminated. To this end the terminal board may be made in detachable sections, each section being detachably connected to adjacent sections as indicated at 56. The constructional details of the grid terminal board may of course vary within wide limits, depending upon manufacturing considerations, but the details of one simple form of construction are indicated in Figs. 2 and 3.

Circuits will now be described adapting this apparatus to the translation of codes for special items, such as preferred stocks. A special preferred stock key is provided at 51 and operates in conjunction with a holding relay 52 having a holding circuit contact 53 and a working contact 54 for applying a ground and battery as at 55 to a preferred stock bus 56. For each item for which two or more types of securities, for example, are to be quoted, a corresponding number of relays may be provided as at 57 and 58. The relay 58 may correspond in function to the relays 26 above described and the relay 59 is provided to shift a ground connection 60 out of circuit with the relay 58 and into association with the relay 57 corresponding to the preferred quotation or the like. That is, the circuit through the relay 58 normally runs through contact 61 of relay 59 and thence to ground 60 when the preferred key has not been actuated. However, when the preferred key is actuated preliminary to the normal operation of the keyboard, the relays which are provided for all preferred stocks or special issues, etc., are all energized with the result that for the particular chosen item the relay 51 is energized in a manner similar to the action of relays 28, the circuit passing through the "make", contact of relay 59 and thence to ground 80. Hence, when the "preferred" key has been pressed, only the preferred issue of a particular selected item is quoted. As soon as T7 either of the relays 57 or 56 is energized, the release relay 18 operates in the manner above described to restore the entire apparatus to normal including the preferred stock holding relay 52. With this arrangement it will be observed that the preferred key i5 may be pressed at any time prior to the pressing of the final alphabetical key II and when the key 11 is finally pressed, the circuits will immediately complete the desired opo1 erations and actuate the release relay 18. With the preferred key thus arranged to be actuated prior to the actuation of the keys II, it becomes unnecessary to utilize holding relays in conjunction with the keys 11.

It may be noted that where relays as at 27 for a large number of items are to be all operated from a single one of the terminal board busses 22, it may be desirable to divide such relay load into a number of branches. That is, it will be understood that when due to the operation of keys I I and 12, one of the vertical busses 40 on the grid terminal board is selected, all of the relays such as at 27 which happen to be connected to such bus will be energized. If, as will occur in some instances, a plurality of relays such as at 27 are all connected to one of these vertical busses, the selection of this bus will result in the simultaneous energization of all of these relays, thus establishing a considerable load carried by the corresponding relay contact 39. For example, one of the relays 27 might be utilized to actuate simultaneously several groups of the other corresponding relays associated with the same vertical bus. With the load thus divided into groups, the current to be broken by the contacts 39 may be substantially minimized so as to prevent arcing.

Fig. 4 illustrates one manner in which this load may be divided between a number of contacts. In this figure the relays corresponding directly to those indicated in Fig. 1 are designated by the same reference characters. It will be noted that relay 21' is connected to be operated through a lead wire as at 25 directly from the corresponding vertical bus, relay 27' having a plurality of contacts 27" equal to the number of groups of relays 27 which are to be controlled thereby. It will be apparent that with this arrangement that the current load which would otherwise be carried by the corresponding contact 39, will be divided between the several contacts 27".

The apparatus is therefore adapted with a wide degree of flexibility to various operating conditions, and the number of parts may be readily enlarged upon or reduced from time to time to accommodate changed conditions, with the result that space and maintenance need only be provided for such apparatus and parts as are actually necessary at various times.

Referring to Figs. 5 to 13, the transmitter arrangement shown performs the function of transmitting a group of distinctive current variations over the line wires LI to L4, Fig. 6, under control of the translator of Figs. 1 to 4, which operate to control the identifying or selective means at the various receiving .stations. The transmitter then functions to transmit a group of current variations for actuating the particular indicators chosen by the selector means. Also, the transmitter provides means for rendering such actuating current variations effective to operate with the "open", "high", "low" or "last" quotation indicators, or, if desired, either the "high and last" or the "low and last" together.

The keys 10, 12 and I I of the translator, Figs. la, lb and 9, which effect the stock selection cause ground potential to be selectively applied to one of the wires in each of the groups 13, 14 and 1B, as hereinbefore set forth, and these groups respectively control the hundreds, tens and units storage relay selectors of the transmitter circuit, the units selector being shown in the upper portion of Fig. 5. As will be noted from Fig. 6 the transmitter is capable of transmitting four digit stock selecting numbers, and since the illustrative embodiment of the translator disclosed employs only three digit stock selecting numbers, the thousands selector impulse counter in Fig. 6 is not connected to a group of thousands storage relay selectors but automatically sends zero for the thousands digit by reason of the fact that the zero contact of the impulse counter is permanently grounded. The zero contacts of the hundreds, tens and units selector impulse counters of Fig. 6 could likewise be permanently grounded, but this is unnecessary because of the fact that the translator causes ground potential to be applied to these contacts whenever zero appears in the stock selecting numbers. As shown in Fig. 9, four groups of actuating keys, arranged in four tiers, e, f, g, and h, corresponding respectively to the four digits of each quotation, and also corresponding respectively to the same four line wires above referred to, are provided for causing ground potential to be selectively applied to one of the contacts of the hundreds, tens, units and fractions actuation impulse counters shown in Fig. 7. The wiring diagram of the hundreds group of actuation keys is shown in the lower portion of Fig. 5. It will be noted that In each of these tiers ten keys are provided and numbered respectively from 1 to 9, the 10th key bearing the indicia zero. These keys provide respectively for sending over the several line wires groups of actuating impulses varying in number from 1 to 10 depending upon which of the keys has been pressed. In the actuation key group it is desirable to provide for the setting of the quotation indicators either at "blank" or at "zero". With the keys arranged as shown in Fig. 9, the pressing of the zero actuation keys functions to transmit groups of ten current variations for setting the corresponding chosen quotation digit indicators at zero, whereas if keys are not pressed in the actuation key groups, the digit indicators will remain at positions exhibiting blanks, the indicators after being selected having been automatically restored to blank positions, by means hereinafter described.

It will be obvious that actuation key tiers e, / and g, bear indicia which may be used respectively to correspond to the hundreds, tens and units of the quotation transmitted, while the tier h bears indicia corresponding to various fraction 1;') values, either decimal or common, depending upon which characters are used on the corresponding quotation digit indicators which are selected at the receiving stations. For example, the ten keys of this tier may be labeled with the characters .1 C:5 to .9 and 0 and keys from .1 to .7 may be also labeled with common fraction characters from /8 to 7/s respectively.

On the group of keys shown in Fig. 9 an additional key i, similar in construction to the keys 7o above described, but bearing the indicia "error" may be used to operate circuit arrangements for releasing the connections established by reason of the previous pressing of any of the selector or actuation keys. Another group of selector keys may also be provided as indicated at k, which are utilized to determine whether the actuation impulses shall function to operate the "open", "high", "low", "last", "high and last" or "low and S last" quotation indicators.

The keys may be operated as follows: For example, if the operator wishes to transmit for a three letter stock or other item a quotation comprising 106%, he may press the three corre0L sponding letter selector keys of the three selector tiers, and also press the actuation keys 1-06---% respectively of the four actuation tiers.

After all of these keys have been pressed, if It should be discovered that one or more of the keys have been pressed by mistake, the operator would press the error key i, whereupon circuit connections set up by reason of the previous pressing of the seven keys, selector and actuation keys would all be restored to normal. That is, circuit connections which have not as yet actively operated to transmit signals will be restored, but circuit connections which may'have been established cbefore a previous pressing of one of the keys ki will continue to be engaged in transmission of signals and will be unaffected by the "error" key.

The operator will next press the desired seven, keys or a lesser number. Then if none of the keys k are in depressed condition, one of the same may be now pressed by the operator, which will start the sending of distinctive groups of impulses over the line wires corresponding to the particular seven selector and actuation keys which have been pressed. Immediately upon pressing one of the keys of the group k, such key as pressed will be locked down and the other keys of this group will be locked up, such locking continuing until the transmission of the distinctive groups of current variations is automatically completed.

Meanwhile, however, during the automatic transmission of these groups of impulses, the operator may reset the selector and actuation keys to correspond to any desired new quotation which is to be next transmitted. Then as soon as the locking of the keys of the group k is released, another key of such group may be pressed for starting the transmission of the second quotation.

It is therefore unnecessary for the operator to await the actual transmission of a quotation over the line wires before setting the selecting and actuating keys for the next quotation, and accordingly substantially the maximum possible speed of operation of the keyboard is obtainable.

That is, the speed of operation of the keyboard may be limited only by human skill in operating the same. Yet the locking of the keys of the group k automatically prevents confusion of the digits of one quotation with those of the succeeding, and since the selector and actuation keys may be pressed In any desired sequence or concurrently at the operator's convenience, in any event there is no possibility of confusion of the selector impulses with the actuation impulses by reason of false settings.

Inasmuch as provision is made to actuate the keyboard for selecting and sending a new quotation before the previous quotation is completely transmitted, it is apparent that storage means is necessary for storing the information of each setting, at least for a limited time. In my aforesaid patents provision for such storage is made in the form of a perforated tape, the perforations being made prior to actual use of the tape and being distinctively arranged to indicate the quotations of desired stocks. Another manner in which such storage could be accomplished would be by the use of two or more keyboards, but according to the particular embodiment of my invention here disclosed, I have obviated the necessity for a plurality of keyboards, and instead have provided two sets of relays operated upon alternately by a single keyboard. Typical groups of relays for this purpose are designated on Fig. 5, as Groups I and II, the operation of which will be hereinafter described in detail.

In the system described in my aforesaid patents, the choice as between "open", "high", "low" and "last", "high and last" or "low and last" is accomplished by establishing various combinations of polarities on the four line wires. That is, when the transmission of signals is initiated, a sustained potential on' each line wire of a predetermined polarity is set up, then the subsequent selecting and actuating current variations take the form of potential interruptions or drops on the line wires. With the keyboard and circuit arrangements of this invention, such sustained potentials are established by the pressing of the keys k, which at the same time initiate the transmission of current variations and shift the selector and actuation keys from cooperation with ithe storage relays of one group to those of the other group. Since the chosen one of keys k remains depressed until the sending of one quotation is completed, it is apparent that the predetermined line potentials established by pressing one of such keys may also be maintained, subject to the current variations, throughout the sending of one quotation, and therefore all selecting and actuating impulses of a given group will be directed either to the "open", "high", "low" or "last" Indicators, depending upon which key k is pressed.

Stordge relay circuits The circuits of the digit storing relays are 40 largely indicated on Pig. 5. At the top of Fg. 5 the two alternately used groups of the relays for the "units" selector are shown. It will be understood that similar groups will be provided respectively for the tens and hundreds digits of the stock or item designating numbers. These additional relay groups are attached respectively to the wires bearing the indicia tens and hundreds on Pig. 6. For simplicity such additional groups of relays are not shown as they are constructed and arranged in the same manner as those shown at the top of Pig. 5.

Likewise, at the lower part of Fig. 5, the two alternately used groups of storage relays for the hundreds actuation keys are illustrated, additional groups (not shown) being provided and connected to operate over the wires designated as tens, units and fractions on Fig. 7.

The miniature numbers used designating the keys, relays and impulse counter contacts are considerably smaller than the numerals used in designating other parts of the apparatus and should not be confused therewith.

Referring to Fig. 5, we will first assume that all relays are deenergized and that one of the selector wires, for example, the wire corresponding to the digit 9, of the group 13 has been grounded by the operation of the translator. The circuit is established from ground at the translator, through one of the normal contacts 105 of a transfer relay 106, the coil of a digit storing relay 107 (relay for digit 9) to battery and ground at 108. Digit storing relay 107 therefore operates and closes contacts at 109 and 110. Contact 110 prepares a circuit to the transmitter but this circult is however open at a contact I I of a transfer relay 112. Contact 109 in closing establishes a holding circuit for relay 107 which is as follows: battery and ground at 108, coil of relay 107, contact 109, a normal contact I13 of the transfer relay 112, an error release bus 114, thence to a normal contact 115 of an error release magnet 116, Fig. 7. This circuit holds up digit storing relay 107 but conditions its circuit so that it may be released whenever error release magnet 116 is energized.

In a similar manner any digit storing relay may be locked up over the error release bus 114 by pressing the keys of the translator. It may be noted that digit storing relays in Group II as at I17 are disconnected at normal contacts 118 of a transfer relay 119. Therefore, pressing of the translator keys has no effect at this time on any of the relays in Group'II. The error release bus 114 as well as a transmission release bus 120 and a transfer bus 121 are common to all digit storing relays, both for selection and actuation.

If, now, the transfer bus 121 is grounded, all the transfer relays such as 106, 112, 119, 122, 123 and 124 are energized, since all have one terminal connected to the battery and ground 108 and their other terminal connected to the bus 121.

This ground may be placed on the transfer bus at the proper time by the transmitter per se, as explained hereinafter. The transfer relays therefore open all normal contacts as at 105 of relay 106 and 122 of Groups Nos. I, and close make contacts as at 18 of relays 11 and 123 of Groups No. II. Also the contact 109 of relay 101 which is closed, is transferred from the ground on error bus 114 to another ground on the transmission release bus 120, by the closing of a contact 125 and subsequent opening of the contact 113 of relay 112. The holding circuit of relay 107 is now completed over the transmission release bus 120, (see Fig. 7), and a contact 126 of a transmission release relay 127 to ground. This relay is energized by the transmitter when all impulses for one quotation have been transmitted, as explained hereinafter. The relay 112 in closing also closes the contact III, Fig. 5, thereby placing a ground on the 9th contact of a unit selector impulse counter, through the contact 110 of the relay 107, and through a sender bus as at 128 to the 9th contact of the units selector impulse counter as shown on Fig. 6.

The reverse of the above described circuit changes occurs by the operation of transfer relays 119, 123 and 124. That is, the ground at contact 129 of relay 124 is removed from sender busses 128 by the opening of the contact 129; also the holding circuit of all of the Group II relays is transferred from the transmission release bus to the error release bus by operation of the contacts 139 and 131 of the relay 124.

This places the Group II digit storing relays in condition to record such digits as are next chosen by the translator.

The operation of the digit storage relays of the actuation groups may be the same as of those above described. However, as above explained, it is desirable to provide ten actuation keys 101 in each group, which selectively apply ground from 102 and wire 103 to one of the ten wires 104, and accordingly ten storage relays are provided in each actuation group, and furthermore, as shown in the lower portion of Fig. 5, relays 132 and 133 have been added which are in series with the holding circuits of the groups of digit storing relays. The relays 132 and 133 correspond to the blank spaces on the indicator units selected at the receiving stations. Parts of the actuation storage relay circuits which are similar to corresponding parts of the selector storage relay circuits are identified on the drawings by the same numerals accompanied by prime marks.

If no keys are pressed, relays 132 and 133 do not operate and the "blank" wire of the actuation bus group 128' remains grounded through one or the other of contacts 132' and 133'. Assuming, however, that a contact of Group I has been pressed, then the circuit of relay 132 will be closed either by way of error release bus 114' or transmission release bus 120', through either contact 113' or 125', thence through the coil of relay 132 to one of the contacts as at 10i' of the particular storage relay which has been actuated, thence through such relay to battery and ground at 108'. Therefore, when certain of the actuating keys of Groups Nos. I are pressed, the relays such as at 132 (of the hundreds, tens, units and fractions groups) cause the ground connections to be removed from the "blank" actuation busses, but when no actuation keys are pressed, the relays 132 being inactive permit the contacts 132' to remain closed. The contacts 132' complete their circuits through other contacts as at 132" which are under the control of transfer relays 112'. When the actuation keys of Groups Nos. I are being set, the transfer relays 112' are inactive and hence contacts 132" remain open until a transfer to Groups Nos. II is made, whereupon energization of relays 112' closes contacts 132" for effecting completion of the grounding circults through contacts 132' whenever no keys have been pressed in the corresponding groups.

Then, as will be hereinafter explained, the corresponding contact marked (-) on the actuation impulse counters being grounded, will cause the impulse counter to send no impulses, thus leaving the corresponding selected indicators at the receiving stations in positions to Indicate blanks.

Actuation storage relay Groups Nos. II are arranged in a similar manner, that is, when transfer is made from Group I to Group II, relay 124' will be energized, thus opening a ground circuit through a contact 133". Then if keys are not pressed in Groups Nos. II, the relays 133 will remain idle permitting the group circuit to be conditioned through closed contacts 133'. Thereafter upon transfer back to Group I, relay 124' will be deenergized, thus closing the ground circuit through the contact 133", contact 133', "blank" actuation bus, to the (-) contact on the corresponding actuation impulse counter, such ground being maintained during the existing actuation cycle and until the next transfer, but not interfering with the resetting of Groups Nos. I. As to constructional features and details of the digit storing relay groups which are not herein described at length, referehce may be had to various prior art patents and publications, which describe somewhat similar arrangements, but modified and adapted to a distinctly different purpose, namely, automatic telephone switching, as explained for example by H. H. Harrison in his book on "Automatic Telephony", Longmans Green & Co., London, 1924, pages 130-134. It will now be apparent that by the use of the storage relays above described, the actual transmission of current variations may be provided for to take place simultaneously with the resetting of the keys for a subsequent quotation. The function of the storage relays it will be observed is to apply a ground connection to proper contacts on the selector and actuation impulse counters. That is, referring to Figs. 6 and 7, it will be noted that an actuation impulse counter is provided respectively for each of the groups of transmitter busses 128 and IS', such Impulse counters having arcuately arranged groups of contacts corresponding respectively to the units, tens, hundreds and thousands selector digits and the fractions, units, tens and hundreds of the actuation digits. Such impulse counters will be hereinafter described in detail.

Assuming now that the operator has pressed the desired selector and actuation keys, he is now ready to start the actual transmission of the current variations which will correspond in number to the designating numbers of the storage relays of the various Groups Nos. I which have been energized, through the busses 13, 14 and 16 of the translator circuit, and the price keys. "Starting keys" and choice of "open", "high", "low" and "last" indicators Referring now to Fig. 8, the next operation is the depression of any desired one of the six keys 34 (which have been designated as group k in Fig. 9 in order to distinguish from the numbered digit keys). For example, if the "open" key is pressed, this completes a circuit from a ground at 135 through contacts of a switch 134 through a corresponding one of the connection wires 138 to one of the corresponding potential selector relays as at 137, the winding of a starting relay 138 to battery and ground 139. The relay 188 thereupon "picks up" and completes through a contact 140, a circuit from the transmission release bus 120, through a key release magnet 141 to battery and ground at 142. The holding magnet 141 (see Fig. 11) operates to displace a template as at 143 against the tension of a spring 144. The template 143 is shaped so as to engage with the various keys of group k as follows: When for example, a key as at 14, Fig. 11, is depressed and the magnet 141 is thereupon energized as above explained, the template will engage the stem of such key in a manner apparent from the drawings and prevent the same from being raised until the magnet is deenergized. At the same time keys which are in raised position, as for example key 146, will also have their stems engaged by the template 143 in the manner shown, whereby such keys are held against being depressed until the magnet 141 is deenergized.

Referring now again to Fig. 8, concurrently with the actuation of the relay 138, the particular relay 137 which has been energized will cause a group of four contacts as at 147, 148, 149 and 150 to be closed. The relays 137 are each arranged with these groups of four contacts so as to apply a ground connection to one or the other of the other of the two wires of each of four pairs of connection wires 151. These pairs of wires are in turn connected respectively to pairs of line polarity relays as at 152 (see Fig. 7), so that when certain of the groups of contacts 147, 148, 149 and 150 are closed, the corresponding relays 152 operate to connect the four main line wires, LI, L2, L, IA, each to either a source of negative potential 157 or a source of positive potential 158. This operation it will be understood serves to apply the sustained potentials to the lines, of such polarities as to determine whether "open", "high", "low" or "last" indicators will be operated by subsequent current variations, and also with certain combinations of potentials to permit the operation of "high" or "low" indicators with the "last" indicators at the receiving stations. On Fig. 7, a tabulation is given of suitable line potentials which may be applied to permit the desired control of the receiving indicators arranged as described in my aforesaid application Ser. No. 244,873. For example, if the "last" key is pressed, potentials will be normally applied to the line wires LI, L2, L3 and L4, respectively, as follows: plus, minus, plus, minus.

With these potentials, any actuation impulses transmitted over the lines will serve to operate the "last" receiving station indicators. Now, if it is desired to operate the transmitter in conjunction with receiving circuits such, for example as shown in Fig. 12 of my Patent 1,890,876, 'issued on my application Ser. No. 244,873, the line polarities may be first established for "restoration" purposes as indicated in the tabuation of Fig. 7 of this application. After the necessary number of "restoration" impulses are transmitted in a manner hereinafter explained, the polarity of line L3 may be quickly reversed, whereupon the line potentials will be such as to permit "actuation" of the chosen indicators at the receiving stations. This shifting of the polarity of line L3 is accomplished by the operation of a relay 153 acting in conjunction with relay switch members 154, 155 and 156, the operation of which will be hereinafter explained in detail. The association of the line wires with the line polarity changing switches and the sources of potentials 157 and 158 is fully explained in my aforesaid Patent 1,890,876.

Selector impulse transmitting circuits At the same time that the line potentials are being established as above explained, the start- 40 ing relay 138 (see Fig. 8) also closes a contact 159 which, it will be observed, connects a ground with a "starting wire" 160, (see Figs. 6 and 7) which, when energized, initiates the transmitting action through the medium of relays 161 and 162. The relay 161 may be of a slow-acting type with a copper slug on its armature end causing the relay to be slow to "pick up". The relay 162 may be of the ordinary quick acting type. Upon energization of the "starting wire" 160, the relay 161 "picks up" after a short delay, but only after the quick acting relay 162 has "picked up" through a normally closed contact 163, such circuit running from ground through contact 159, starting wire 160, contact 163, coil of relay 162, a contact 164, to battery and ground at 165, the contact 164 being under the control of a selector impulse counter stepping magnet 166. The relay 162 then is provided with a holding circuit by reason of the closing of a contact 187 which connects the relay 162 directly to ground in lieu of having its circuit run through contact 163 and the starting wire to ground. Upon the actdation of relay 161 the starting wire circuit is broken at the contact 163.

This may occur at approximately 0.1 second after relay 182 has "picked up" and causes the circuit of the starting wire to remain open at this point until the transmission of current variations for one quotation is completed; thereafter the same y0 circuit is opened at contact 159 until the starting key is pressed for the following quotation.

Thereby, repetition of the actuation of the selector circuits is prevented until a starting key is again pressed. Before proceeding further with the transmitting circuits, the impulse counter construction will be described: Impulse counter construction.-The impulse counters or switches may take the general form of the well known rotary line switches as used in automatic telephony switching, one example of such a switch being shown in the above cited work by Harrison on page 41. Inasmuch as the details of construction of such switches are well known, only the features particularly adapting such switches to this invention will be here described.

As shown in Fig. 12, this switch may be of the rotary step-by-step type having five double rotary wipers arms as at 113 and one single rotary wiper arm as at 174. (See Fig. 6 for schematic illustration.) These wipers may all be mounted in alignment on, but insulated from, a single shaft as at 175 (see Fig. 12), cooperating with a ratchet 176 and pawl 177 so as to be rotated step-by-step always in the same direction. The pawl in turn may be driven by an armature as at 178 of the stepping magnet 166. The pawl as advanced by the armature engages one of the teeth of the ratchet 176 and as the magnet 166 is deenergized, the ratchet together with the wiper arms are rotated one step in the direction of the arrow by the force of a spring 179 acting against the pawl member. Reverse movement of the ratchet and wipers may be prevented as by a spring dog 180.

The outer ends of four of the wipers 173 respectively are arranged to come into contact successively with thirteen contact points as at 181, arranged as shown in arcuate groups. Two of the wipers, namely one of the double wipers 173, and the single wiper 174 come into contact with continuous arcuate segments 182 and are used for the control of the transmitters and the transfer bus as hereinafter explained. The manner in which the switch 164 above mentioned is associated with the stepping magnet 166 is indicated in Fig. 12, the switch 164 being arranged to open its circuit whenever the magnet 166 is energized.

The operation of the selector impulse counter or switch will now be explained in connection with the diagram on Fig. 6. It will be observed that for clearness on Fig. 6 the step-by-step switch of Fig. 12 has been shown schematically as divided into six groups of parts, one bank of contacts or else a segment being included in each part.

The manner in which segments 182 cooperate with wipers 173 and 174 is shown. That is, wiper 174 is normally out of contact with its segment 182, but when the wiper 174 is advanced in the direction of the arrow through, say, approximately one-half step, then contact will be made with its corresponding segment 182 (which is grounded), and such contact will be maintained throughout the succeeding one-half revolution of the wiper, whereupon such contact will be broken during the next one-half revolution. The wiper 173 (having double arms) above referred to, which cooperates with another of the segments 182, it will be observed, normally has both its arms out of contact with the segment 182.

However, upon rotation of such double wiper through an angle equivalent to substantially one full step, contact will be made with the segment 182 (which is also grounded) and such ground connection will be maintained until the wiper rotates through one-half revolution to another normal position. Upon rotation of the wipers through the succeeding one-half revolution, the above action will be repeated. The manner in Rtevertig agsain to thle operation of the selector 5 transmitting circuits: relay 162 in "picking up" also closes a contact at 168, which conditions an impulsing circuit from ground to the make contact 168, through the winding of an impulsing relay 169, to a make contact 170 of a motor 10 driven interrupter 172 and thence to battery and ground at 171. The interrupter 172 may comprise a motor operated cam as shown for closing the switch 170 during intervals of time substantially equal in length to the desired length of the current variations or impulses which are transmitted. After the preparation of the circuit through impulsing relay 169 by the closing of contact 168, subsequent operations of the interrupter 172 cause groups of impulses to be generated in the circuit.

When the first impulse from the interrupter 172 causes energization of magnet 169, this magnet closes contacts as at 184 and 185. Contact 184 merely grounds a circuit without immediate effect, since it will be noted that its circuit remains open at contacts 186, 187, 188 and 189. Accordingly, if the first impulse generated by the interrupter 172 should happen to be of abnormally short duration, such "clipped" impulse cannot be made effective to cause false operation of the transmitter. Meanwhile contact 185 closes the circuit through the stepping magnet 166, such circuit comprising battery and ground at 165, magnet 166, contact 185 to ground. This energizes the magnet 166 and causes the wipers 173 and 174 to be advanced the initial step. Concurrently contact 164 is opened by the energization of magnet 166 and consequently, relay 162 is "dropped out", releasing its holding circuit at the contact 167 and also releasing its contact 168.

The releasing of contact 168 in turn removes the ground return of the circuit of impulse relay 169.

However, another ground return is applied to the winding of impulse magnet 169, placing the same now under control of the impulse counter, by the action of a relay 190 connected in circuit with a relay 191 and battery and ground at 192, and operating to close a contact 193, which in turn connects the coil of relay 169 to ground. Contact g5 168 is then ineffective until the next quotation is to be transmitted. The circuit of the coil of relay 190, it will be observed, has just been completed through that one of the wipers 173 which has advanced one step into contact with its grounded segment 182. Meanwhile also the single wiper 174, as soon as it has advanced as much as onehalf step, causes the transfer bus 121 to be grounded through its grounded segment 182, thereby causing the transfer bus to be energized to effect a transfer of one group of storage relays from the operating key control to the transmitting apparatus, while transferring the other group of storage relays from the transmitter to the keyboard control in a manner as above explained. It will be observed that inasmuch as the wiper 174 continues'in contact with its segment 182 only during one-half revolution of the impulse counter, the transferring action will be reversed during the succeeding one-half revolution. That is, one complete cycle of operation of the impulse transmitting switches is completed upon movement of the same through 1800, but the wipers 113 having double arms, upon completion of one cycle are again ready to operate through another cycle utilizing the wiper arm which was Inactive during the previous cycle.

Relay 191 upon being energized through its circuit above traced, closes the contacts 186, 187, 188 and 189, which serve to complete impulse circuits to line impulse relays 194, 195, 106 and 191, respectively, which circuits are each completed through contacts 198, 199, 200 and 201, respectively, the latter contacts in turn being respectively under the control of "digit cut-off" relays 202, 203, 204 and 205. At the same time relay i91 also prepares a holding circuit for the digit cut-off relays by closing a contact 206. The circuits through the line relays run from ground g1 through contact 184, respectively through the contacts 186, 187, 188 and 189, thence respectivelythrough contacts 198, 199, 200 and 201 to the line relays, thence to battery and ground in each case as shown. The holding circuit for the digit cut-off relays runs from ground through contact 206, thence through contacts as at 207, one of the latter being provided as shown for each of the digit cut-off relays, and thence through the respective digit cut-off relays to battery and ground. 2g These circuit changes are made successively upon the occurrence of each succeeding impulse as generated at the interrupter 172, and the wipers 873 and 174 continue to advance step-bystep. When one of the wipers I 7 reaches a contact 88I which has been grounded by the operation of the keyboard as above explained, then the corresponding digit cut-off relay is actuated and its corresponding holding circuit is established, thus preventing the sending of further impulses over the corresponding line wire by reason of the opening of contacts 198, 199, 200 and 201.

For example, supposing contact 9 of the hundreds bank has been grounded. Then immediately upon the arrival of the brush 173 upon contact 9, relay 204 "picks up", opening the contact 200 which prevents further impulses from going to the line relay 196. Also relay 204 at the same time closes its contact 207, which establishes its holding circuit from ground through contacts 206 4 and 207, relay 204, to battery and ground 208.

Each of the relays 202, 203 and 205 operate in a similar manner when the other wipers 173 arrive at grounded contacts of the thousands, tens and units impulse counter groups. The parSticular contact 181 of the thousands counter which represents zero, it will be noted, is permanently grounded, so that a total of ten impulses will be transmitted.

The relays 191, 202, 203, 204 and 205 are of a slow acting type with copper slugs on the heel ends of the cores, whereby these relays are made slow to release. The relay 891 may be delayed in opening for 0.1 second and the relays 202, 203, 204 and 205 are preferably delayed somewhat longer. These delays permit other circuits hereinafter described to be established for transmitting indicator restoration and actuation impulses.

As each of the digit cut-out relays 202, 203, 204 and 205 "picks up", it closes a corresponding one of the series contacts 209, 210, 211 and 212.

When all of these series contacts are closed, then the transmission of selector current variations over the four line wires is completed. Accordingly at that time the circuits are ready for the transmission of impulses for restoring the selected indicators to zero prior to reactuation.

Thus when all of these four series switches are alosed, a ground connection is made for the circuit of a relay 213, which circuit is continued to ground through a battery 214, 'The relay 213 is of the type which is slow to "pick up" as symbolically indicated and serves to interpose a delay between the transmission of selector impulses and the succeeding 'transmission of restoration impulses, such delay being desirable by reason of the selector circuit arrangements at the receiving stations as described in my aforesaid Patent 1,880,876.

Transmission of indicator restoring impulses The relay 213 after the short delay, closes contact 215, which establishes a circuit through relay 861' as follows: ground, contact 215, coil of relay 181' to battery and ground 214. The relay 161' corresponds in function to the relay 161 above described in connection with the selector transmission circuits. From this point the circuits for the transmission of indicator restoration Impulses are analogous to the circuits above described for transmission for the selecting impulses, and the relays, contacts and parts which perform similar functions are therefore indicated on Fig. 6, with the same reference numerals, such reference numerals being accompanied by prime marks in the case of the restoration impulse transmitting circuits. With receiving arrangements as described in my Patent 1,89,8876, provision is made for restoring the indicators to zero by applying to such indicators as have been selected a sufficient number of impulses, namely 3( ten, to advance the indicators to either a blank or zero setting regardless of what their previous setting may be. Therefore, it is not necessary in the restoration impulse transmitting circuits to "cut off" the number of impulses except after ten have been transmitted. Furthermore, the ten restoration impulses may be transmitted simultaneously over the four line wires so that but a single restoration impulse counter is required, common to all four lines, having ten steps or contact positions as indicated at 980'. The construction of such impulse counter may be the same as that shown in Fig. 12, except that only one bank of contact points S81' need be provided to operate in conjunction with a double wiper I73'. Furthermore, the transfer bus controlling wiper I1~ of course need not be here provided, although for control purposes a wiper Hi' is used in conjunction with an arcuate segment 6M2'.

Since the ten restoration impulses are transmitted simultaneously over all four line wires, the four separate relays 202, 203, 204 and 205 may be replaced by a single relay 202', having a single set of contacts 198', 207' and 209', the functions of which are obvious from reference to the description of contacts 198, 207 and 20S. The contacts 186', 1871, 188' and 189' operating in conjunction with the relay 191' serve to bring the impulses from contact 984' directly to the connections for the four line relays 194, '95, 196 and S97 respectively.

It will be observed that an interrupter 972' (see Fig. 7) independent of the interrupter 172 may be provided so that if desired the duration and spacing of the restoration interruptions may be made different from that of the selector interruptions. This is desirable for the reason that in some instances It may be found advisable to operate the receiving station selecting devices at a step-by-step rate different from that of the indicating devices. However, inasmuch as the restoration and actuation impulses both act upon the receiving station indicators, the same interrupter 112' may be conveniently used for the transmission of restoration impulses, as well as the transmission of actuation impulses in a manner hereinafter described.

The function of the contact 200' is to cause a connection wire 216 to be grounded upon completion of the transmission of restoration impulses. At this time the circuits are ready for the transmission of the actuation impulses for moving the receiving station indicators to the desired new positions to exhibit a new quotation. The wire 216 has the same function in respect to the actuation impulse transmission as the starting wire 180 has in connection with the selector impulse transmission. When> the wire 216 is grounded at contact 209' the relays and contacts of the restoration impulse transmitting circuits are brought to normal positions in readiness for the succeeding quotation transmission.

Transmission of indicator actuation impulses 20 In a manner similar to the operation of the selector and restoration impulse transmitting circults, the indicator actuating impulse transmitting circuits shown on Fig. 7 are placed in operation by the energization of a relay 161". From this point on the actuation impulse transmitting circuits continue through a cycle of operations in the same manner as the above describpd operation of the selector impulse transmitting circuits, and on Fig. 7 the actuation impulse transmitting relays and contacts bear reference numerals with double prime marks, the same numerals being used as on corresponding parts of the selector transmitter.

An actuation impulse counter is provided sim85 ilar in practically all its details to the selector impulse counter excebt that of course the transfer bus control wiper 174 and its segment 182 are omitted. Also none of the zero contacts here is permanently grounded since zero actuation keys are provided instead. After the last actuation impulse has been transmitted, the series contacts 209", 210", 211" and 212" are all closed whereby a circuit is completed through a contact 217 to the transmission release magnet 127 above referred to. This causes relay 127 to "pick up" for a short time, thus opening the ground connection at 126 to the transmission release bus 120. After a short delay, a relay 218 opens the contact 217, whereby relay 127 is again deenergized. Referring to Fig. 5, it will be noted that the momentary removal of the ground at contact 126 from the transmission release bus 120 will cause the storage relays, then associated therewith, to be released in preparation for a new setting.

On the other hand, if the operator had made a mistake in pressing certain of the keys prior to the transfer action, then pressing of the error key would have actuated error release magnet 116, which would have momentarily removed the ground at contact 115, of error release bus 114.

This would have released the storage relays associated therewith prior to transmission of impulses corresponding thereto.

The momentary removal of the ground at contact 126 from the transmission release bus 128, it will be noted, also causes deenergization of the key release magnet 141, which in turn permits the key 134 which has been pressed, to rise back to normal position with a consequent deenergization of the starting relay 138, which in turn opens contact 140, causing the key release magnet circuit to remain open until another quotation is to be transmitted.

Referring again to Fig. 7, it will be observed that at the relay 182" I have provided an additional make contact 210, which becomes closed upon actuation of relay 112". That is, upon initiation of the transmission of actuation impulses, a circuit is then established from ground, through S contact 210, through the coil of polarity reversing relay 153, to battery and ground. Thereupon the relay II "picks up" and actuates Its contacts 154 and 186, and also upon its contact 18I. It will be observed that contacts 154 and 166 comprise in effect a double pole, double throw switch which is associated with two of the polarity connections 181 in a manner whereby the polarity applied to line LI is reversed upon actuation of relay 183. Therefore, when the circuits above described are prepared for the initial transmission of actuation impulses after the completion of the transmission of restoration Impulses, the polarity of line LI is reversed so as to shift the receiving station apparatus from restoration conditions to actuation conditions. Inasmuch as relay 182" remains energized only for a short period, the contact 156 on relay 153 is provided for establishing a holding circuit for relay 153 by way of the transmission release bus 120, the latter being grounded at contact 121. Relay 153 therefore remains actuated throughout the period of transmission of actuation impulses, but upon removal of the ground from the transmission release bus, relay 153 drops to normal thus preparing the circuits to apply the proper line potentials for the next selecting step.

Receiver As hereinbefore stated, the transmitter and 3U code translator may be employed with any suitable type of receiver, for example, as disclosed in my aforesaid application Ser. No. 244,873, on which, among others, U. S. Patents Nos. 1,890,876 and 1,890,877 have issued, and to which reference may be had for a more detailed disclosure of such a receiver. Figs. 14 to 16 diagrammatically illustrate the receiver.

The various potentials imposed on lines LI, L2, LI, L4 by the transmitter hereinbefore described energize selecting magnets 230, 231, 232 and 233 (Fig. 15). Line LI is extended through the coils of magnets 230 and 231 and line L2 is extended through the coils of magnets 231 and 232. The operation of these two magnets is to effect selection of indicators within a group of indicators by connecting the various bus lines "last", "low", "high" and "open", with main actuating lines BI, B2, B3, B4. Line LI is extended through the coil of magnet 232 which controls the selection and restoration and actuation busses for the indicators. Line L4 is extended through the coil of the magnet 233 and the coil of the magnet 230. The magnet 233 connects the various selecting switches and magnets to the grounded go battery.

If, for example, the transmitter causes positive potentials to be set up in lines LI and L4 and negative potentials in L2 and LI, line L4 energizes the magnet 233 which through its switch 234 connects the switch system to the battery. The potentials on lines L2 and LI being of like sign, the magnet 232 will be energized and its switch member 235 will be drawn into position to complete a circuit from the battery through the restoratlon magnet 238 connecting all the restoration bus lines to the main bus lines for the "last", "low", "high" and "open" indicators. The positive potential on line LI and the negative potential on line L2 will have no effect on the magnet 231 and, accordingly, its spring switch 238 will remain in the position shown. The positive potential on line LI and the positive potential on line L4 will cause energization of the magnet 230 and closing of the open switch 239 and opening of the closed switch 240. This completes the circuit from the battery through switches 234, 238, 239 to "low" magnet 241, which connects the main "low" bus wires to the main actuating wires B, , B, B3 and B4. The potentials imposed on these lines have therefore connected the restoration bus lines for the "low" Indicators to the main actuating lines Bi, B2, B9, B4. The "last", "high" and "open" magnets 242, 243 and 245 are controlled respectively by potentials as shown in Fig. 7.

Selection of groups of indicators Referring to Fig. 14, the potential on line LI 20 will have energized magnet 245 which attracts its spring switch 246 to complete a circuit from a battery through the coil of a slow-to-release magnet 247, and the spring switch 248 to ground.

The polarity imposed on line L2 will have energized magnet 248 in the hundreds selector which completes through its spring switch 249 a circuit from a battery through the coil of a slow-torelease magnet 250 to the ground. Similar magnets in the tens selector and units selector will have been energized, but the description of the selecting mechanism will be limited to the cooperating thousands and hundreds selectors, which are the same respectively as the tens and units selectors.

When the selection impulse counters of Fig. 6 operate, the potentials over lines LI, L2, L3, L4 are interrupted by the relays 194, 195, 196 and 197. Considering, first, the interruptions of potential in line L:, the effect of an interruption is to deenergize the magnet 245 of Fig. 14 so as to complete a circuit from ground spring switch 246, spring switch 251, spring switch 252 of magnet 247, through the coil of the slow-to-release magnet 253, and the coil of the vertical stepping magA5 net 254, to a battery and ground. As set forth in detail in my aforesaid patents, selector switches of the well known "Strowger" type are employed, in which a selector shaft in the thousands selector is raised one step for each energization of a Svertical magnet, such as the magnet 254. As the shaft is raised it permits the switches 260 and 261 to close and remain closed as long as the shaft is in elevated position.

An interruption of the potential on line L2 deenergizes the magnet 248 in the hundreds selector and establishes a circuit from ground through spring switch 249, spring switch 262, spring switch 263 of slow-to-release magnet 250, coil of the slow-to-release magnet 264 and coil of the stepping magnet 265 to the battery and ground. The energization of the stepping magnet 265 operates a hundreds selector shaft 288, Fig. 16. This shaft carries a grounded switch arm 269 which is moved over a series of contacts o5 270 as the shaft is rotated. The shaft also carries off neutral switches 271 and 212 (Fig. 14) which are constructed to close and remain closed as long as the shaft 268 is out of home position.

After the interruptions over lines LI and L2 have ceased, that is when the vertical adjustment of the selector shaft of the thousands selector and the angular adjustment of shaft 268 of the hundreds selector have been completed, the cessation of interruptions of potentials on line LI will cause the magnet 245 to remain energized, which will naintain the magnet 247 energized and prevent further energization of magnets 253 and 254 and cause the slow-to-release magnet 253 to deenergize. Energization of the magnet 247 has drawn its switch member 273 to complete the circuit from the grounded battery, switch member 273, coil and shunt of magnet 274, switch member 275, switch member 276, switch 261 through the coil of a magnet 277 to ground, thus preparing a circuit through the switch member 278 of the magnet 277.

The cessation of impulses on line L2 maintains the magnet 248 energized, which maintains the circuit over the magnet 250 and breaks the circuit through the magnet 264, which closes a circuit at the point 279. As the magnet 253 in the thousands selector deenergizes, it closes a circult from the battery over the switch 273, switch 280, switch 278, through the coil of the horizontal stepping magnet 281, through the switch 271 in the hundreds selector, switch 279, and switch 282 of nmgnet 250 to the ground. This energizes the horIzonal magnet 281 which rotates the thousands selector shaft one step, and opens the switch 276 which breaks the circuit through the magnet 277 thus breaking the circuit through the magnet 281.

When the circuit through the magnet 281 is broken the switch 278 again completes the circuit through the magnet 277 which in turn completes the circuit through magnet 281. When the selector shaft of the thousands selector is elevated by interruptions over line LI as previously described, the contacts 286 and 287 are raised into alignment with a horizontal row of contacts 288 and 289. As the magnet 281 is energized and deenerglzed to rotate the shaft these contacts are moved along the selected row of contacts 288 and 289 and the energization and deenergization of the magnet 281 is continued until the contact 286 finds a live contact 288 which is grounded through one of the contacts 270 (Fig. 16) and the arm 209. When this occurs the circuit over the magnet 277 will be shunted and the magnet 274 will be energized to attract its switch 275 and prevent further energization of the magnet 277. This in turn prevents completion of the circuit through the magnet 281 over the switch member 278. Energization of the magnet 27~ also moves the switch member 251 to connect the line BI through switch members 251 and 246 to ground. Energization of magnet 274 also attracts its switch member 291 which extends a circuit from battery over switch member 291, contacts 267 and 289, selector line 292 to a panel board (Fig. 15). S One of the tens selector lines 293 has been connected by mechanism similar to that in the thousands selector through a switch 294 to ground.

The selector line 292 at the point of intersection with the line 293, is connected by one side of a O double plug to a line 295 extending through the coil of a group selector magnet 296 and then over line 207 to the other side of the plug to the line 293 and to ground. This energizes the magnet 296 and selects a group of indicators corre- 68 sponding to the adjustment of the selectors in Pig. 14 under the control of the selection impulses received from the transmitter. Each of the indicator elements of the indicator units of the groups of indicators is diagrammatically indicated at 299.

When the circuit was made at 279 in the hundreds selector, the magnet 298 in the selector was energized by a circuit from ground, battery, coil of the magnet 298 over switch 271, switch 279, 7T III switch 282 to ground. Energization of the magnet 298 attracts the switch member 262 and connects line B2 through the switch member 262 and switch member 249 to the ground, upon deenergization of magnet 248 by interruptions on line L2. In the same manner lines L3 and L4 are connected respectively to lines B3 and B4 in the tens and units selectors.

By means of the mechanism so far described the impulses sent over the lines LI, L2, L4, L4 have caused the selection of a group of indicators, of certain indicators within the group, and have connected these lines with restoration busses for these indicators, and the restoration impulses sent over the lines LI, L2, L2 , L will cause corresponding impulses over the lines BI, B2, B3, B4, and over the restoration bus lines to the selected indicators to restore the indicator elements of the selected indicators to zero or blank, depending upon the particular type of indicators employed. By means of a known construction, as stated in the aforesaid patents, and a structure similar to that shown in the patent to Frischknecht et al., 1,852,994, dated April 5, 1932, the circuits leading to these indicators will be opened at the time the indicators reach their zero or blank positions. After the selected indicators have thus been restored, positive polarity is quickly applied to the line L3. This will cause deenergization of the magnet 232 in Fig. 15 which will release its switch member 235 and connect the battery to the actuation magnet 300, which will connect the main bus lines to the forward actuation bus lines. The actuation impulses are then sent over lines LI, L2, L3, L4 and the resulting impulses over lines BI, B2, B3, B4 will pass through the indicator actuating bus lines to the selected group of indicators and the selected indicator in the group. This will actuate the indicators forwardly an amount determined by the actuation impulses received.

The restoration and actuation inof the selected indicator is now complete and the positive and negative sources of polarity 157 and 158 (Fig. 7) will be disconnected from the lines LI, L2, L3, L4.

This will cause the magnet 245 in the thousands selector (Fig. 14) to be deenergized, which causes the deenergization of magnet 247, and all thed parts will be restored to the position in which they are shown in the drawings. The same thing will occur in the hundreds, tens and unit selectors.

After the magnets 245 and 247 have been deenergized a circuit will be completed from the battery through the release magnet 302, switch 260, switch 252, switch 251, and switch 246 to the ground.

Energization of the magnet 302 permits the selector shaft to be rotated to home position and to drop under the influence of gravity to vertical home position, and as it drops into its home position it opens the switch connections 260 and 261.

All the elements of the thousands selector are now in home position. In the hundreds selector deenergization of the magnets 248, 250 and 298 completes a circuit from the battery through the release magnet 307, through contacts 272, switch 263, switch 262, and switch 249 to ground. This energizes magnet 307 which causes the shaft 268 (Fig. 16) to return to its home position. The same thing occurs in the tens and units selectors. Combination selection of indicators It may at times be desirable to simultaneously restore and actuate a plurality of indicators in a group, such as the "low" and "last", and the 75 "high" and "last" indicators of the selected group.

For this purpose the line LI is branched over the coil of the polarized magnet 310, Fig. 15, which is responsive to negative impulses from line LI. When the magnet 310 is energized it prepares a circuit from the "low" and "high" magnets 241 and 243 over the switch members 311 and 312 and over its own switch 313 to the circuit which controls energization of the "last" magnet 242 of the "last" switch member 314.

When the polarity on line LI is negative and either the "low" or the "high" bus line is selected, the "last" bus line will be selected simultaneously.

While the invention has been described in detail with respect to certain preferred examples thereof which give satisfactory results, it will be understood by those skilled in the art after understanding the invention, that various changes and modifications may be made without departing from the spirit and scope of the invention and it is intended therefore in the appended claims to cover all such changes and modifications.

What is claimed as new and desired to be secured by Letters Patent of the United States is: 1. In an item quotation system, an item quotation transmitter, an item quotation receiver interconnected with said transmitter, means in the transmitter for registering a combination of letters indicative of the item concerning which a quotation is to be transmitted, means in the transmitter for translating the said registration into an arbitrary combination of characters and for transmitting such characters to the receiver, and means in the receiver responsive to the said transmitted characters for selecting the item corresponding to the letter combination registered in the transmitter.

2. A quotation system comprising an item quotation transmitter, an item quotation receiver, means in the transmitter for registering a combination of alphabetical characters indicative of the item concerning which a quotation is to be transmitted, means operatively associated with the transmitter for translating the said registration into an arbitrary combination of digits, means for transmitting such digits to the receiver, and means in the receiver responsive to the said transmitted digits for selecting the item corresponding to the character combination registered in the transmitter.

3. In a stock quotation system, a stock quotation receiver having a display board including a number of indicators, some of said indicator groups corresponding to stocks identified by a given number of characters while other of said indicator groups; correspond to stocks identified by a different number of characters, a stock quotation transmitter having registering apparatus for registering the characters identifying any one of said stocks, and for registering additional characters indicative of a quotation concerning any registered stock, sending means in said transmitter operable under the control of said registering apparatus, and means in the receiver responsive in any case to the sending means in the transmitter for selecting the group of indicators corresponding to the concerned stock and for'operating the indicators to display the desired quotation.

4. In a selecting system, a plurality of selecting relay groups, each having associated therewith a group of electromagnets, means whereby each of the selecting relays in the first group is adapted to select an individual electromagnet in the first group, means whereby each of the selecting relays in the second group cooperates with any selecting relay in the first group to select an electromagnet in the second group, and means whereby each of the selecting relays in the third group cooperates with any selecting relay in each of the first and second groups to select an electromagnet in the third group.

5. A code translating device comprising a plurality of groups of storage relays, each group including relays corresponding to the letters of the alphabet, key means for energizing said relays ) to set up the letters representing stock letter abbreviations, a preferred key, a plurality of groups of conductors, stock magnets under control of said groups of relays for energizing one conductor in each of said plurality of sets of conductors, and 5means under control of the preferred key and said groups of relays for energizing different ones in said groups of conductors.

6. A code abbreviation transmitting device comprising a plurality of relays one for each 0 code item to be transmitted, distinctive transmitting circuit connections controlled by each of said relays respectively, a plurality of groups of operating keys, circuit connections whereby operation of one key in each of said groups effects ,5 selection and energization.of one of said relays, holding means for maintaining the circuit connections established by the operation of keys in each successive group until such time as a key is operated in the last group, and means under the control of said relays for releasing said holding means when one of said relays is energized.

7. A code translating device comprising a group of alphabetical keys, a group of relays respectively under the control of each of said keys, a second group of keys, groups of circuits r'spectively under the control of each key in said second group, said circuits including switches under the control of said relays, the arrangement of the groups of said relays and switches being such that one of said circuits will be selected and energized to the Sexclusion of the others upon operation of one key in each of said groups of keys, and means under the control of said circuits respectively for transmitting translated code items.

8. A code translating device comprising a group 45 of alphabetical keys, a group of relays under the control of each of said keys, a second group of keys, groups of circuits respectively under the control of each key in said second group, said circuits including switches under the control of 50 said relays, the arrangement of the groups of said relays and switches being such that one of said circuits will be selected and energized to the exclusion of the others upon operation of one key in each of said groups of keys, a key for transmitting special items corresponding to certain desired items, and means under the control of said circuits respectively for transmitting either a normal code item, or a special code item if said special key is operated.

9. Means for translating abbreviations representative of stocks, commodities, or other items into an arbitrary numerical code, comprising a plurality of groups of operating keys one group for each letter of the alphabetical abbreviation, a preferred or "special" stock or item key, a plurality of relays one for transmitting each translated code item including prefered or "special" items, and circuit connections cooperating to choose one of said relays corresponding to the particular keys which are operated.

10. The combination of letter keys for setting up a common stock abbreviation, means controlled gO by said keys for translating said abbreviation into a numerical code, a preferred key, means controlled by said preferred key for causing said letter key-controlled means to set up a different numerical code, and means for normalizing said 5 letter and preferred key-controlled means automatically as an incident to the operation of a letter key for setting up the last letter of an abbreviation.

11. A code translating device comprising a plurality of banks of keys, each bank including keys of the alphabet and a special key, a plurality of bus wires, a plurality of relays for effecting circuit connections over said bus wires in distinctive combinations, and means for controlling said relays from said letter and special keys for operating relays according to a one, two or three stock letter abbreviation.

12. A code abbreviation translating device comprising a plurality of relays, one for each code item to be transmitted, distinctive transmitting circuit connections controlled by each of said relays, a plurality of operating keys, circuit connections whereby operation of said keys in different combinations effects energization of relays corresponding to said combinations, holding circuits for maintaining the circuit connections established by the operation of said keys, and a circuit controlled by any one of said relays upon energization of such relay for opening said hold- 5 ing circuits.

MERTON L. HASELTON.