US946680A - Electric snap-switch. - Google Patents

Description

N. MARSHALL.

ELECTRIC SNAP SWITCH. APPLICATION FILED SEPT.21, 1909.

Patented Jan. 18, 1910.

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-Fig. 6 shows an edge elevation.

.the bridge to the switch in UNITED STATES PATENT @FFTCE.

NORMAN MARSHALL, OF WEST NEW'TON, MASSACHUSETTS, ASSIGNOR TO THE ARROW ELECTRIC COMPANY, OF HARTFORD, CONNECTICUT. A CORPORATION OF CONNECTICUT.

ELECTRIC SN AP-SWITCI-I.

' Specification of Letters Patent.

Patented Jan. 18, 191%.

Application filed September 21, 1909. Serial No. 518,853.

To all whom it may concern:

Be it known that I, Xommx i\.l.\ItSIL\LL, a citizen of the Fnited States. residing at W-est'Newton, in the county of Middlesex and State of Massachusetts, have invented a. new and useful Improvement in Electric Snap-Switches, of which the following is a specification.

This invention relates to the construction of the actuating mechanism of an electric snap switch of the push button class. The object of the invention is to provide a push button switch mechanism having parts which are cheap to manufacture and assemble, which are sure and efficient in action, and which arest ong and durable in use.

Figure l of the accompanying drawings shows a side elevation of a push button electric switch mechanisn'i which embodi s the invention. Fig. 2 shows a side elevation of the mechanism with the movable conducting poles omitted. Fig. 3 shows a similar view of the same with the parts in the positions occupied when the actuating spring is under tension, and. just latch is moved to release the lock plate. Fig. :4. shows a view of the same with the parts in the positions taken just after the lock plate has been released and the movable parts have been thrown by the actuating spring. Fig. 5 shows an elevation of the side opposite to that shown in Fig. 1. Fig. 7

before a,

shows a plan of the blank from which theframe is formed. Fig. 8 shows-a side and an edge view of one of the latches. Fig. 9 shows a side and an edge view of the rocker .plate to which the push buttons are at tached, and which is provided with the cams that release .the latches from the lock plate afterthe actuating spring has been placed under tension. edge view of the lock plate.

The supporting frame illustrated is t'ormed of one piece of metal, which is blanked and bent so as to provide a bridge I piece 1 having openings 2 forthe push buttons and perforated ears 3 for attaching the receptacle and for securing the place it is to be used. Extending from the edges of the bridge are legs 4, one of which has feet 5, designed to engage the bottom of the receptacle and assist in supporting the. mechanism in place Fig. 10 shows a side and an under tension. the other end 1 lug on the latch, and so 5 therein. The legs of the frame haveperforations 6 and extending through these perforations 'is a spindleT. Mounted on the spindle is a rocker plate 8, connected with opposite ends of which are the shanks 9 of the push buttons 10. On the edge of each end of the rocker plate is a cam surface 11, and bent from one edge of the rocker plate so as to extend parallel with the spindle is an arm 12. The end 13 of this arm is turned up and is perforated for the passage of the spindle. Mounted on the spindle is a lock plate 14 provided with a locking notch 15. An arm 16 is bent from an edge of the lock plate so as to extend parallel with the arm that projects from the rocker plate. The end 17 of this arm is turned up and is perforated for the passage of'the spindle. A spring 18 is coiled about the spindle. One end of the spring is bent so as to project on one side of the rocker plate and lock plate arms, and the other end of the spring is bent so as to project on the other side of these arms.

Mounted on the spindle but insulated therefrom, and connected with the lock plate so as to be insulated therefrom, but to move therewith, are the conducting pole plates 19. Pivotally mounted on a stud 20 projecting from one side of the frame are a pair of latch plates 21. Each of these latch plates has a detent end 22 adapted to engage an end of the locking notch 15 in the lock plate, an inwardly extending lug 23 that projects into the path of one of the earns 11 at the end of the rocker plate, and an outwardly project ing lug 24; for the engagement of an end of the spring 25. This spring is bent around the stud upon which the'latches are pivoted,

and its ends made to press against and thrust apart the lugs which project from the upper ends of the latch plates in such manner as to cause the lower or detent ends of the latch plates to bear against the edge of the lock plate. hen the projecting push button is pressed inwardly, the rocker is rotated and the rocker arm engaging with an end of the actuating spring places the spring of the spring being held by the lock plate arm until the cam at the end of the rocker plate opposite to that end to which the push button being pressed is attached. engages the inwardly projecting movesthat latch that the detent end is, raised out of the locking notch in the lock plate. Then the lock pl-ite,

being released, is thrown by the spring so as to snap the movable conducting poles.

The parts of this mechanism are simple to form, as they can be blanked and bent to shape by punches and dies. The throw is strong, for the spring is placed under consid erable tension before the lock plate is released; the movement is easy for there is practically no friction until the cams engage the lugs that project from the latches, and at that time the action is smooth, for the cams oscillate the latches very easily. As a result of the shape and engagement of the parts there is comparatively little Wear, and no particular strain upon any of the parts, and the break is long because the throw of the poles is considerable.

The invention claimed is:

1. The combination in an electric snap switch, of a frame, a spindle supported by the frame, a rocker mounted on the spindle, cams formed at the ends of the rocker, a lock platehaving a locking notch, mounted on the spindle, conducting poles connected to and movable with the lock plate, latches pivoted to the frame, said latches having detent ends adapted to engage the end walls of the look-- in notch in the edge of the lock plate and lugs adapted to be engaged by the cams at the ends of the rocker, a spring arranged to force the upper ends of the latches apart and cause the detent ends to bear upon the edge of the lock plate, and an actuating spring i made tense by the movement of the rocker I and arranged to throw the lock plate when that plate is released by the engagement ofa cam at the end of the rocker with :1 lug projecting from the latch that is holding the lock plate. a l 2. In a snap switch mechanism, the combination of a trame, a spindle carried by the frame, a rocker mounted on the spindle, l means for oscillating said rocker, cams l formed at the ends of said rocker, a lock plate mounted on the spindle, said lock plate l having a locking notch in one edge, conductl ing poles connected to and movable with the I lock plate, an actuating spring mounted on l the spindle, said'spring being arranged to be made tense by the movement of the rocker is released, a pair of latches mounted upon the same stud, said latches having detent ends adapted to engage the ends of the looking notch in the edge of the latch plate and lugs adapted to be engaged by the cams at the ends of the rocker, and to be oscillated from the locking'notch in the lock plate, and a spring engaging and holding the upper ends of thelatches apart.

NORMAN MARSHALL.

lVitnesses M. A. Man'rnns, E. A. DANIELS.

and to throw the latch plate when that plate for lifting the detent ends of the latches.

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