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Document |
Document Title |
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4380009 |
Message communication system
A message communication system which provides instant messages and memoranda at a telephone user's desk. In an office complex, a message is transmitted over pre-existing office power lines to...
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4243836 |
Digital autostart circuit
A terminal unit having a digital autostart circuit for energizing an output device such as a teleprinter. The autostart circuit responds only to the space character which is transmitted between...
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4191848 |
Teletypewriter motor controlling
The first signal transition of a teletypewriter signal triggers a resettable one-shot that activates the motor run switch to turn the teletypewriter motor on for a minimum interval of from two...
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4160874 |
Process for signaling an interruption in the state of readiness for the reception in data terminal devices in which data are exchanged
In a process for signaling an interruption in the state of readiness of a data terminal device in a called station, the data being transmitted over a data selector network, and in particular for...
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4093819 |
Closed user group facility
A closed user group facility in a data transmission system which has a closed user group of terminals accomodated in a switching network, and in which the switching network registers a terminating...
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4054745 |
Motor control device for data terminals
A control device is described for linking a motor operated data terminal to a data processor which provides information signals including data characters and data terminal motor-start signals. The...
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3995106 |
Information transmission system
The invention refers to a system for rapidly transferring optical information from a document to a human being over a telecommunication channel. The system comprises an optical reader connected...
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3938187 |
System for putting an information record onto a magnetic substrate
An information recording system comprises a peripheral control unit for recording bits of a character one at a time coincident with the middle of a record time interval. The peripheral control unit...
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3916090 |
Intracommunication system for a communications terminal
A telecommunications terminal which is divided into at least two portions; specifically, a keyboard portion and a central portion with a display and a memory, in which the depression of a key on...
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3909510 |
Direct connection digital transmission apparatus
Apparatus is disclosed for interconnecting digital data stations through a transmission medium such as a directly connected unloaded pair of wires. The apparatus transmits data as polarity, or more...
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3803346 |
CIRCUIT ARRANGEMENT FOR THE TRANSFORMATION OF DIRECT CURRENT TELEGRAPHY SIGNALS
A circuit arrangement for converting single current, direct current telegraphy signals into double current signals is described. The double current signals operate a double current telegraphy...
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3800069 |
SINGLE STEP TAPE READER
A telegraph transmitter is adapted to generate a stream of output signals while operating in a continuous or running mode as an encoded punched tape incrementally is driven past a sensing station...
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3798549 |
APPARATUS FOR TRANSMITTING DATA OVER RADIO CONNECTIONS
Circuitry is described which facilitates data transmission over radio links by preventing receiver errors, even when call addresses are distorted. The incoming call addresses consisting of several...
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3796995 |
REMOTE CODED DUAL STATE CONTROLLER APPARATUS
A remote station for a loop communication system includes a point module which is specifically related to an on-off load control or the like. The point module is coupled to the loop system through...
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3757032 |
METHOD AND APPARATUS FOR SELECTIVELY ENABLING A REMOTE RECEIVER
An information transmission and recording system wherein a character is arranged in a dot-matrix form and the signals which represent the dots are transmitted column by column of the matrix in...
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3699525 |
USE OF CONTROL WORDS TO CHANGE CONFIGURATION AND OPERATING MODE OF A DATA COMMUNICATION SYSTEM
A data communication system comprising a processor, a memory, a communications controller and a plurality of terminal devices utilizes control words to select the configuration and to select the...
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3684822 |
METHOD FOR CENTRALIZING THE FUNCTIONS OF SINGLE CURRENT-DOUBLE CURRENT CONVERTER CIRCUITS IN CENTRALLY CONTROLLED TELEPRINTER DIAL SWITCHING INSTALLATIONS
A method is described for the conversion of single current to double current signals in teleprinter dial switching installations having a central control. The control system operates to control the...
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3678179 |
TERMINAL APPARATUS
A printing terminal apparatus for data transmission is adapted to transmit at the beginning of each message sent to a central computer, a code combination indicative of the terminal operator and to...
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3673570 |
COMBINATION EMITTER FOLLOWER DIGITAL LINE DRIVER/SENSOR
A combined digital line driver and sensor for both transmitting and receig digital control signals between a plurality of stations over a single conductor. Each station includes an emitter follower...
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3646573 |
CIRCUITS FOR INTERCONVERTING GROUPS OF PARALLEL FORM AND SERIAL FORM SIGNAL BITS
A system for linking a first typewriter with a remote typewriter or other data processing device, whereby the first typewriter transmits groups of binary signal bits indicative of typewriter...
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3623068 |
SERVING DISPLAY FUNCTIONS BY MEANS OF CODED SPACE INFORMATION
Disclosed is a display system including a regenerative display and a memory where the memory provides the information which is displayed. The memory addresses have a one-for-one correlation with...
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3601539 |
PHASE SYNCHRONISM SYSTEM FOR A ONE-WAY TELEGRAPH CONNECTION
A one-way telegraph system for permitting recurring phase synchronism checks by transmitting at predetermined intervals a definite series of alternate special service and/or idle time signals which...
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3593293 |
REMOTE CONTROL AND DATA LOGGING SYSTEM
A data reporting, logging and remote control system utilizing teleprinter code for transmission of orders and reporting information between a control station and one or several outstations.
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3548080 |
CIRCUIT ARRANGEMENT FOR TELEPRINTER EXCHANGE SYSTEMS
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3529076 |
ARRANGEMENT FOR THE OVERFLOW STORAGE WITH RESPECT TO BUSY LINES IN TELECOMMUNICATION THROUGH SWITCHING (CIRCUIT-SWITCHING) SYSTEMS
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3527891 |
SELECTOR CIRCUIT
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3519743 |
CIRCUIT ARRANGEMENT FOR SIMULTANEOUS SIGNALLING IN BOTH TRANSMISSION DIRECTIONS BETWEEN TWO TERMINAL STATIONS IN TELECOMMUNICATION SYSTEMS
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3511923 |
REMOTELY CONTROLLABLE TELEGRAPHIC SYSTEM
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3509271 |
ELECTRONIC TIME DELAY MOTOR STOP
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3496293 |
AUTOMATIC DIRECTIONAL CONTROL FOR HALF-DUPLEX DATA TRANSMISSION SYSTEMS
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3482042 |
TELEGRAPH ELECTRONIC CONTROL DEVICE
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3462552 |
CONTROL APPARATUS FOR TELEGRAPH EXCHANGE REPEATER
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3453379 |
COMMUNICATION SYSTEM
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3429986 |
PRINT ELEMENT PROCESS FOR MULTILINGUAL COMMUNICATIONS
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3427589 |
ON-LINE DELIVERY OF DATA MESSAGES FROM A TRANSMITTER TO RECEIVERS ON THE SAME MULTISTATION LINE
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3427587 |
ROLL CALL ACKNOWLEDGMENT OF DATA STATIONS ON MULTISTATION LINES
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3427588 |
DISTRIBUTION OF MESSAGES TO DATA STATION RECEIVERS ON MULTISTATION LINES
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3420948 |
TELEGRAPH TRANSMITTER CONTROL CIRCUIT
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3418430 |
Remotely operated data recording system with rotatable card magazine
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3404219 |
In-band break-in system
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3404380 |
Bit-at-a-time assembly device using magnetostrictive delay lines
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3398234 |
Multiple address circuit
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3368028 |
Data entry apparatus
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3317660 |
Printing telegraph motor start-stop mechanism
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3268649 |
Telegraph message preparation and switching center
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3264406 |
Teleprinter control device
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3245038 |
Central to remote communication system with address modification for the remote stations
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3245043 |
Message communication systems with interstation information storage and transmission
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3236940 |
Teletype code control circuits
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3214513 |
Communication equipment
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