US1234069A - Electric switch. - Google Patents

Description

A. H. NERO.

ELECTRIC SWITCH.

APPLICAUON HLED 0CT.28, 19-15. 1,234,069. Patented July 17,1917.

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COMRQNX. 0F HARTFORD, CONNECTICUT, A'COBBOBATION OF CONNECTICUT.

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ELECTRIC swrrcn.

Application filedOctober 28, 1915. Serial No. 58,472.

Y i/ I!!! 121710272 1'2 muy wmm le it' ylt-iiiawn that I. Anvil) ll. Xiaiio, a citizen o .tlie-l'nited States of America. and Lt- Xew Britain. in the county of vented aH'certain-new and Improved Electric .Switch. of which the following is a specitication.

lily invention relates to electric switches and particulai'lyto a flushswitch ot' the push button type commonly employed to control lighting circuits. and the object of;

Fig. 3 is a detached perspective of the switch mechanism 11c! s0- and:

Fig. 1 is a vertical section through the mechanism showing the latter in different position from that shown in Fig. 2.

In the embodiment of my invention here illustrated. the present switch comprises an insi'ilating body 10 ot cup-shape the bottom 13 of which is pierced to permit the operating buttons 11 and 12 to project therethrough. The carrying yoke 11 has loops 15 through which the push buttons pass and lScSQClll-Etl in position by long screws 16 which pass upward tl'irougli the end walls of the body and taking into tapped holes in theyoke. while the heads of the screws overlie the metal closure plate 17 and hold the latter seated against the shoulder 18 in the lower fat-es otthe body walls. The interior of the cup-shaped body thus affords a closed switch chamber 19 into which project the switch terminals '20 and 21. the upper offset ends of which are tapped to receive the securing screws 2; by means of which they are held in position. Binding screws 23 and 21 are carried by theupper ends of the terminal plates and lie in wells and 26 opening to the; switch chamber 19. but closed by the upper ends of the terminals so that dust and dirt are completely excluded from the chamber.

The switch frame comprises a pair of uprights 27 and 28 bent at right angles to their 1.11- 1...... an m! 21 avtnnrlinir fill State of Connecticut. have infrom the margins of the latter are tapped to receive the securing screws 2!) by means Patented July 1 7; 1917.

of which the frame is rigidly secured to the inner face of the cup button 13. v Each'upright :27 and 28 is longitudinallyslotted at 3; and 33 to receive .the margins of the plates 34 and ot' the push buttons 11 and 12 respectively. in order to insure a recti-- linear motion of the buttons in both directions on the actuation of the switch. ing lugs 36 are struck outwardly from each of the uprights between the guideslots to form the axis of the oscillating switch lever 3?. the legs of which are perforated at 38.

to engage the lugs 3G. The uprights are also perforated in register at 39'to form bearings for the short studs *0 carried'by the legs t1. 42, ot' the rocker bar-.43 which inassembled position lies between the standards 27 and 28 of the switch frame. The

switch lever 37 androcker bar 13 thus form" a pair of yokes, the bridge bars of which l e on opposite sides of their respective axes of oscillation.v An actuating spring 4% ex 'tends between these'bridge'bars and is secured thereto at its opposite ends by means of the tongues if) and it) struck. from the respective bridge bars. The switch blade or -ARVID H. unite. or new BRITAIN. CONNECTICUT, sssreno'n 'ro THE amiow nnnermc blades :7 are secured in any suitable manner upon thesides of the switch lever 37. In

the present instance the switch is but ,a single pole device. and consequently only a single switch blade 17 is mounted on the switch lever. I

In order to actuate the rocker bar 43, the leg 11, thereof which has the form of a. web. is slotted on opposite sides of its axis of oscillation at +8 and 4:9 to receive the extei'ideddugs 50 and-51 of the push button plates 3 and These lugs extend'through the slots 48 and i9 and enter the guide slots 32 and 33 in the web27 of the switch frame.

The opposite leg 42 of. the rocker bar 13, instead of being slotted, has the upper face,

of its web shaped to the contour oft-he slots '48 and 49 of the web 41 and this surface is engaged by the shoulders 5% and'55 on the opposite margins of the pusli'butto'n plates 1. In this wayan even pressure is exerted oneachside of the rocker bar, While, the push buttons are detained in engagement with the rocker. by reason of the entry of the lugs 50 and 51 into the slots 48 and 49 of Web 41.

The operation of the switch is readily un-- 119 del'stood. Upon the depression of button 11 from the position which it occupies in Fig.

2 to the position shown in Fig. 4; the rocker bar i3 is tilted on its axis. As the bridge bar of the rocker rises during this motion it tensions the spring 44 so that as soon as the upper end of the spring has passedthe axis of oscillation 36 of the switch bar 37,'it throws the latter from its position of rest against the stop lugs 52 on one side of the frame against the stop lugs 53 on the opposite side of the frame. This results in the shifting of the switch blade 47 from its out of contact position in Fig. 2 to contact position, Fig. i, in which the blade spans the space between the switch terminals 20 and :21 and thus closes the'circuit. The throw of the rocker" bar 43 is limited by its impingement against the bridge bar of the switch lever 37 and no other stops are necessary for this purpose.

The construction shown is simple and the metal parts are readily manufactured by stamping from sheet metal, while the shape of the porcelain is simple and requires no intricate die work. Various modifications and details of construction will readily occur to those skilled in the art without departing from what I claim as my inven tion.

I claim as my invention 1. In a push button switch, a switch frame carryinga pair of opposed plates having therein registering pairs of guide slots, a pair of push buttons rectilinearly guided in said slots, a pivoted slotted rocker having a sliding actuating connection through its slots with said buttons, a pivoted switch lever, said rocker bar and switch lever having each a cross arm lying substantially parallel to the axis of oscillation of each of said levers but on opposite sides thereof, in combination with a switch spring extending between said cross arms and serving to actuate the switch lever when the end of the spring secured to the rocker cross arm is moved past the axis of oscillation of the switch lever by the actuation of the push buttons.

2. In a push button switch, a switch frame carrying a pair of opposed plates having therein registering pairs of guide slots. a pair of push buttons rectilinearly guided in said slots, a pivoted slotted rocker voke having a sliding actuating connecton through its slots with said buttons, :1 pivoted switch lever yoke, said rocker and switch yokes having their bridge pieces lying on opposite sides of the axis of the switch lever, in combination with a switch spring extending between said bridges and serving to actuate the switch lever when the end of the spring secured to the rocker yoke bridge is moved past the axis of oscillation of the switch lever by the actuation of the push buttons.

3. In a push button switch, a switch frame carrying a pair of opposed plates having therein registering pairs of guide slots, :2. pair of push buttonsrectilinearly guided in said slots, a pivoted slotted rocker yoke havinga sliding actuating connection through its slots with said buttons, a pivoted switch lever yoke, said rocker and switch yokes having independent axes of oscillation and their bridge pieces lying on opposite sides respectively of said axes, in combination with a switch spring extending between said bridges and serving to actuate the switch lever when the end of the spring secured to the rocker yoke bridge is moved past the axis of oscillation of the switch lever by the actuation of the push buttons. l. In a push button switch. a frame havmg a pair of uprights, a rocker bar yoke, a switch lever yoke, both of said yokes being pivoted on the uprights of said frame. one between said uprights and the other outside said uprights,-stops on the uprights limiting the extent of oscillation of one of said yokes, the other yoke having members hearing against the bridge piece of said first yoke in the stop position of the latter.

5. In a push button switch, a frame having a pair of uprights, a rocker bar yoke pivoted on and lying between said uprights, a switch lever yoke pivoted on but outside said uprights, stops on the uprights engaging the bridge of the switch lever yoke to limit the extent of oscillation of said switch lever and means on the rocker bar engaging the bridge of the switch lever in stop position to limit the extent of oscillation of the rocker bar.

6. In a push button switch. a frame having a pair of uprights, a rocker bar yoke pivoted on and lying between said uprights. a switch lever yoke pivoted on but outside said uprights. stops on the uprights engaging ,the bridge of the switch lever yoke to limit the extent of oscillation of said switch lever and webs on the rocker bar legs adapted to be engagedby the push buttons and extended to engage the bridge of the switch lever in stop osition to limit the extent of oscillation o the rocker bar.

In testimony whereof I have signed my name to this specification. in the presence of two subscribing witnesses.

ARVID H. NERO. Witnesses.

FRED. P. GA'I'ER, C. A. TENEYCK.

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