USRE12841E - Electric switch - Google Patents

Description

REISSUED AUC. 11, 1908.

No.' 12,841. A

' 11. M. CCFFIN.

ELECTRIC SWITCH.

APPLICATION FILED .TUNE 24,1908.

fave/afar:

UNITED sTnTns raTuNT orriou.

EVERETT M. (.OFFlN, 0F OAKLAND, CALIFORNIA.

ELECTRIC SWITCH.'

Specification of Reissued Letters Patent.

Reissued Aug. 11, 1908.

Original No. 881,300, dated March 10, 1908, Serial No. 304,652. Application for reissue filed June 24. 1908'.

Serial No. 440,118.

To all whom it may concern:

Be it known that I, EVERETT M. CoFrrN, aA citizen of the United States, residing at Oakland, 'in the county of Alameda and Stat-e of California, have invented certain new and useful In'iprovements in Electric Switches, of which the following is a specifiliation. l

'lhis invention relates to improvements in electric switches, the object of the invention being to provide an electric switch which can be made of as lfew parts as possible and without expensive machine work.,

ln the accompanying drawing, Figure 1 is a side elevation of thedevice; Fig. 2 is a vertical section on the line' 2 2 of Fig. 4; Fig. 3 is a vertical section on the line 3-3 of Fig. 4; Fig. 4 is a horizontal section on the line 4 4 of Fig. 1; Fig. 5 is a perspective view of the controller; Fig. 6 is a perspective view of the shifter; Fig. 7 is a broken sectional view showing a modification of the hooks. Referring' to the drawing, 1 represents the supporting plate, which is of the usual form, and is generally placed'within a porcelain casing supporting the splring contacts closed by the switch, but as t ese form no part of the present invention they are here omitted.

Said plate is formed with the usual apertures to receive the push buttons 2, formed upon the outer ends of stems 3, the inner ends of which are pivoted to the ends of the arms 4 of a controller 5 loosely pivoted upon a shaft 6. To support said shaft 6 there is provided a U-shaped piece 7 of sheetmetal, the central portion of which is riveted to the plate 1, as shown at 8, while the side members form posts and are apertured, one 9 at its end and the lother 10 near its end, to forni bearings for said shaft; The mem ber 10 is extended and expanded in width beyond said aperture and v'has a curved guidcway 11 for an arm of the shifter 127 hereinafter described. of said member can lit in a recess in the porcelain casing, not shown, for the purpose.

of forming a firm guide for the contact plate 14, so as to insure contact with the contact springs carried by the porcelain casing.

The controller is constructed to have a Lthem inwards towards the controller.

The extreme end 13.

. the hook away from the shifter.

Wide bearing on the shaft by bending it into a U-shape, or so as to have side members and a'bridge connecting them, the side members both being perforated to permit the shaft 6 to pass loosely therethrough. With the same object the shifter 12 is given the same general form and its side members are perforated to permit the shaft to pass looselyr therethrough. Around the shaft 6 is a coiled spring 15 the ends of which are adapted to be engaged by arms 16 and 17 of the controller and shifter respectively, each extending inwardly from one side member towards the op osite side member of the shifter o1' controler, as the casemay be. The arm 17- moves in the guideway 11, being arrested by the ends thereof, and engages thec'ntact plate 14 swinging on the shaft 6.

The coiled sprinr lies between members of the shifter, while these liebetween the side members of the controller. For the sakeof lightness and convenience of construction the side, members are joined by two bridges instead of onel and the outer edges of these bridges form lips 18 whichare alternately engaged by hooks 19 pivoted upon 'a shaft 2() secured between the sides of the piece 7 near the .plate 1, and connected by a spring 21 whichtends to draw both Iof v n the modification shown in Fig. 7 the two hooks are made out of a single piece of spring metal bent into a.U-sha )ed form, the central portion 22 being riveted between. the plate 1. and the piece 7.

The'following is the operation of the device. Pressurc being applied to whichever push button extends outermost, the controller is thereby rocked upon the shaft, carrying with it an end of the coiled spring and. thereby energizing said spring, since the other end of the coiled spring is held immovable by the arm 17 of the shifter against which it presses, said shifter beingheld back by the hook 19 engaging the lip 18 of the shifter at the side from whichthe controller is moving. In the meantime the edge ofthe central ortion of the controller abuts against t 1e shank of 'said hook and presses As soon-as said hook by said movement is thrownofl hooks, and the means for to rock, is advantageous, since it enables the forming controller and shifter each to be made 'U- shaped in a single piece having a"wide bearing on the shaft without the necessity of machine Work, instead of, as heretofore,

the Wide bearing by securing together two pieces of fmetal and then machinin the same.

claim 1. In a device of the character described, the combination of a contact, a shaft upon which said Contact rocks, -a shifter also rocking on said shaft` and operatively connected With said contact, a coiled spring around the shaft for energizing said shifter, and a controller having side members and a bridge connecting them, said opposite side members being pivoted on said shaft on opposite'sides of the coiled spring, substantially as described.

2. In a device of-the character described,

Y the combination of a shaft, a contact rocking thereon, a shifter operatively connected with said contact to impart motion thereto, a coiled spring around the shaft, and 'a controller forenergizing said coiled spring,'the shifter having side members and a=bridge connecting them and having its opposite l members ivoted upon the shaft on opposite sides of t 1e coiled spring to provide Va lon bearin'gfor said shifter, substantially as described.'

3. In a device ofthe character described, the combinationv of a contact, a shaft vupon vhich said-contact rocks,'a shifter also'rocking on said shaftand operatively connected with aid contact, a coiled springA around the shaft for energizing said shifter, and a controller also rocking on said shaft for energizing/said coiled spring, said shifter and controller each having side members an'd a bridge vconnecting them, -the v coiled spring lying @Withinthel side .members of the latter lying within the side members of theshifter, and

the controller, substantially as described.

4. Ina device ofthe character described, -the combination of a contact,'a shaft upon which said contact rocks, a shifter also rocking on 4said shaft andA operatively connected with said contact,y a coiled s )ring around the shaft forenergizing said s ifter, a pair of hooks yalternately-engagingthe shifter to pre- ".-zv--vent movement of the same,

and a controller around the shaft for energizing said shifter, a

controller alsolrocking on said shaft for energizin said spring, said shifter and controller each 'avingside members and a bridge connecting them and the said shifter and con troller each having its side members pivoted upon the shaft on the opposite sides of the coiled spring.

6. In a device of the character described,

the combination of a shaft, means for supporting the said shaft, a bridge-containing device having its legs journaled upon the said shaft, a spring coiled around the said shaft and having its opposite ends crossed and located upon the opposite sides of the bridge portion of the said bridge-containing device, a second bridge-containing device,v the levs of which are also journaled -upon the said shaft, andthe bridge'portion of which is located between the opposite ends of the said spring, means for occasioning oscillation of the first-named device to place'the spring under tension, a stop for preventing movemen-t of the second device, and means for occasioning movement of the said stop toV disengage the samefrom the said device and -permit movement of the latter under the influence of the said spring.

7 Ina device of the character described, the combination of a shaft, means for supportinnr the same, abrid e-eontaining device ivotatfly connected tot e said shaft, means or occasioning movement of the said bridgecontaining device, a spring coiled around the saidv shaft, the opposite ends of which are crossed and areplocated u'pon opposite sides of the bridge-containing device, a second bridge-contaming device, pivotally connected to the said shaft, and one portion of which is also located 'between the opposite ends of thesaid spring, one'part ofthe said device being,l

arranged to form a tri ger hatch, a stop lever adapted to be engag by' thelatter )art of sai second device, and a v'art upon the first named device .Which is a apted to occasion movement of the said sto lever into and out of alinement with the saidl device,`where'by movement of the said sec= ond devic'eymay be occasioned by the said spring, substantially as described.

- 8." vn a device ofthe character described, the combination of a contact member, a support-folfthc saidfcontact member, a shifter operatively connected to' the said contact member,v means associated with; the' said part of the secondshifter for energizing it, a 'controller-for enhand inthe presence 0f two subscribing wit-. engr/ingl the seirimeailsl, the saidlshift'er and nesses. its said controller eac *ravin sir e members w 1 by which they are supporte, and the side LVERETT M' IN 5 members of each being connected bya bridge, Witnesses: i'

substantially as described. FRANCIS M. WRIGHT,

kI n witness whereof have hereunto set my BEssm GORFINKEL:

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