Title:
Push button
United States Patent 2444552


Abstract:
My invention relates to a push button for completing electric circuits and particularly to an electric switch operated by a spring retracted button. Among the purposes and objects of my invention are to provide: A switch connecting an electric circuit through a conical spring. A push button...



Inventors:
Sigurd, Brantingson
Application Number:
US62132345A
Publication Date:
07/06/1948
Filing Date:
10/09/1945
Assignee:
Bruno, Martinuzzi
Primary Class:
Other Classes:
200/276
International Classes:
H01H13/12; H01H1/24
View Patent Images:
US Patent References:
1861400Push button switch construction1932-05-31
1842524Push button switch construction1932-01-26
1085215N/A1914-01-27
0996303N/A1911-06-27
0730567N/A1903-06-09



Foreign References:
GB328811A1930-05-08
Description:

My invention relates to a push button for completing electric circuits and particularly to an electric switch operated by a spring retracted button. Among the purposes and objects of my invention are to provide: A switch connecting an electric circuit through a conical spring.

A push button switch having a sliding contact to change the contact points.

A push button switch having a plastic insulated body and plastic button operator.

A push button removably and quickly secured in place.

A new and novel construction reducing the number of parts and increasing the reliability of a push button switch.

I accomplish these and other objects by the construction herein described and shown in the accompanying drawings forming a part of this, my disclosure.

In the drawings: Fig. 1 is an elevation.

Fig. 2 is a longitudinal section at the axial centerline.

Fig. 3 is a bottom plan view with the keeper disc and terminals removed.

Fig. 4 is a top plan view with the push button and contact spring removed.

Fig. 5 is a plan view of one of the contacts.

Fig. 6 is an elevation of one of the contacts.

Fig. 7 is an elevation of the push button.

Fig. 8 is an elevation of the body.

Fig. 9 is a plan view of the contact spring.

Pig. 10 is an elevation of the contact spring.

Fig. 11 is an elevation of the contact spring completely compressed.

Fig. 12 is a bottom plan view of the body.

Fig. 13 is a plan of the keeper disc.

Fig. 14 is an elevation of the keeper disc.

Fig. 15 is a plan of one of the securing springs.

Fig. 16 is an elevation of one of the securing springs.

Similar reference characters refer to similar parts throughout the several views of the drawings and in the specifications.

Push button switches are often easily rendered inoperative by dirt or corrosion and the metal bodies easily short circuited.

The operations for assembling the numerous parts and the number of parts to be assembled are reduced by my invention; the contacts kept clean and the elimination of the danger from short circuits eliminated by my plastic parts which are a good insulator.

In the following specifications, I have described my preferred construction in precise detail so that my push button may be more easily understood by one skilled in the art. The preciseness of detail of this specification is not intended to limit the scope of my patent as it is believed that the details may' be modified in many respects without departing from the principles which underlie my invention; a study of this disclosure may suggest modifications. Referring to the drawings, the button operator S is shown as having its exposed face 2 normally projecting above the top end 3 of the body 4 which is recessed 5 to permit the button operator to freely move axially by overcoming the conical contact spring 6; the upper small end 7 of which rests against the center hub 8' on the under side 9 of the operator I.

The recess 5 terminates sufficiently below the bottom side S to permit the travel of the button and also to provide for the large end of the spring 6 to seat in the bottom 10 of the recess.

The bottom 10 of the recess also serves as a stop against which the hub 8 rests when the operator is forced completely down.

The conical spring 6 is so constructed that each of its coils may pass the adjacent coils until the several coils may be brought on a common plane or lie flat, as shown in Fig. 11 of the drawings.

The coils, however, are prevented from assuming this extreme position by engaging with the contacts I and 12 and thus completing the electric circuit.

The contacts II and 12 are preferably somewhat tapered conical or pointed 13 to cause the coils of the spring to slide on the inclined conical surface 14 of the contacts thereby to assist in keeping the contacting parts clean and free from dirt and' corrosion.

The conical spring 6, in addition to completing the circuit between the contacts IlI and 12, forces the operator to return to its normal position when pressure applied to the face 2 by the finger of the person operating the push button is released.

The axial travel of the operator I, caused by the spring, is restricted by the center sleeve: 15 which is secured within the hub 8 by the: top flanged end 16. The bottom end II; after being inserted into the guide aperture 19 below the o0 bottom 10 of the recess 5 of the body- 4at the center 18 therebf, is flared outwardly to provide the head 20 which engages the shoulder 21 at the top of the recess 22 which is of a diameter and length sufficient to permit the head 20 to freely travel with the operator.

The lower turns of the coil spring being larger ticular serv in diameter are less resistant to the movement of be made of the button operator and make contact with the sive metal ,points after slight movement of the button which render mar becomes harder to push as the stop position is 5 after a shor reached. ation of mn The sleeve 15 also serves as a guide cooperat- Having t ing with the button operator; the operator freely tion of my slides axially in the recess 5 and the sleeve in the ing princip guide aperture 19. 10 as new and Each of the contacts 11 or 12 is preferably in- set forth in serted into its respective aperture 23 or 24 which I claim: is provided with a squared recess 25 or 26 in the 1. In a p bottom face 21 of the body 4 to receive the squared a pressable heads 26' of the contacts. Each contact is also 15 ing the m threaded internally to receive the terminal spring and screws 28 and 29 which detachably secure the nected by wires 30 and 31 which are connected to the ter- pressed, sai minals 32 and 33, thereby providing the neces- of said co sary electrical connections to the device. 20 adapted to The contacts 11 and 12 are secured into the the contact body from removal by the insulated keeper the conical disc 34 which is secured to the body by the inte- sequence o0 gral studs 35 and 36 which extend through the 2. In a p countersunk apertures 37 and 38 after which the 25 a pressable studs are formed into the heads 39 by heat and the movem pressure to secure the keeper disc in place against and a plurr the bottom of the body. said spring In addition to the squared recesses 25 and 26 conical con in the bottom face 27 of the body are the irregu- 30 ical spring lar shaped recesses 40 and 41 from the top sur- on said coi face of which the studs 35 and 36 depend down- parts, said wardly. The recesses 40 and 41 conform to and ible button receive the securing springs 42 which are also 3. In a p held in place by the keeper disc 34 and the studs 35 a pressable 35 and 36. the movem The securing springs extend upwardly on the and a plur outside of the body to provide four upwardly said spring extending resilient prongs 43. conical con The prongs 43 are preferably bent 44 near 40 cal spring their free ends 45 to provide yielding detents to on said co engage the panel or other object 46 to which the parts, said device may be detachably secured; the panel substantial or other device, shown by broken lines Fig. 2, compressec may be a wall or desk top or the like which has 45 4. In a i been provided with a suitable hole to receive the a pressable body and springs leaving the turned over top end the mover 3 of the body 4 above the surface. The entire and a plur push button may be removed by inserting any suitable to thin tool such as a knife under the edge 41 of 50 said sprin the end 3. slide on ar The terminals 32 and 33 and the wires 30 and tacts when 31 may be swung to the positions shown by broken lines in Fig. 2 to permit my device to be inserted into holes in material which is of a depth which would interfere with the wires; the wires and entire push button being inserted in the hole. The follc The securing springs are preferably formed file of this integral in pairs as shown particularly in Figs. 15 and 16. The part 48 connecting the pair of springs conforms to and is secured in one of the Number recesses 40 or 41 and the aperture 49 engages one 730,567 of the studs 35 or 36. 996,303 The keeper disc 34 is provided with the clear- 1,085,215 ance holes 50 which permit the screws 28 and 65 1,842,524 29 to pass through to engage the threads in the 1,861,400 contacts II and 12.

The simple construction and ease of assembling my device permit the parts to be made in small Number sizes, however, the size may vary to suit the par- 70 328,811 ice desired. Many of the parts may plastic and the others of non-corroso that dampness and fumes which ly types of push buttons inoperative t period of use do not affect the opery device.

hus described a preferred construcpush button embodying the underlyles of my invention, which I claim desire to secure by Letters Patent is Sthe following claims.

ush button switch or the like, having button operator and a body guidovement of the operator, a conical a plurality of conical contacts consaid spring when said operator is .d conical contacts engaging the coils nical spring whereby the latter is slide on said conical contacts to wipe ing parts and to cause several coils of I spring to engage said contacts in ie after the other.

ush button switch or the like, having button operator and a body guiding ent of the operator, a conical spring ality of conical contacts connected by when said operator is pressed, said tacts engaging the coils of said conwhereby the latter is adapted to slide nical contacts to wipe the contacting conical spring operating said pressin one direction of travel.

hush button switch or the like, having button operator and a body guiding ent of the operator, a conical spring ality of conical contacts connected by when said operator is pressed, said itacts engaging the coils of said coniwhereby the latter is adapted to slide nical contacts to wipe the contacting conical spring forming helical coils .ly on a common plane when fully I.

ush button switch or the like having button operator and a body guiding ient of the operator, a conical spring ality of contacts having sloping sides engage one or more of the coils of g whereby the latter is adapted to id wipe said sloping sides of the conSsaid button is pressed.

SIGURD BRANTINGSON.

REFERENCES CITED )wing references are of record in the Spatent: TNITED STATES PATENTS Name Date Plassmann -------- June 9, 1903 Wilhelm -_---- June 27, 1911 Lungen --------- Jan. 27, 1914 Hansen ----------- Jan. 26, 1932 Miller --------- May 31, 1932 FOREIGN PATENTS Country Date England ---------- May 8, 1930