US1949694A - Noiseless electric switch - Google Patents

Description

March 6, 1934. F POU 1,949,694

NOISELESS ELECTRIC SWITCH Filed March 30, 1952 ZZ Z8 l INVENTOR.

5 20 'FFLHHK PULL t; L/WM Wwf/ f Patented Mar. 6, 1934 L y :51,9aa41; n,

Frank Poli, ltIillbrae,Calif; .n

Application March so, 193'2."SeriiN9-cpzt1f j w (Cl. zoo-163) 2 Claims.

The present invention relates generally to. electrical devices and has particular reference to noiseless switches.

Generally, switches of this character are 5 termed push button switches, and in the electrical industry it is common parlance to term these switches snap switches".

It is the general object of the instant invention to provide an electrical switch of the character described that embodies in its construction,

means for causing the silent operation of the mechanical features of the switch.

Another object of the invention is to provide a noiseless switch of the class described that embodies means for causing the silent operation thereof and also novel contacting means therefor.

Another object of the invention is to provide a switch of the class described that is positive in action, is simple in construction, and that embodies few parts in its assembly.

Other objects and advantages of the invention will be apparent with reference to the accompanying specification and the attached draw- 111g.

Referring to the drawing generally Figure 1 is an elevation illustrating a face view of the switch as applied to the wall of a building;

Figure 2 illustrates the switch with the cover plate removed;

Figure 3 is a longitudinal sectional detail of the switch taken on the line 3 3 of Figure 2;

Figure 4 is a transverse sectional detail taken on the line 4-4 of Figure 2;

Figure 5 is an enlarged detail illustrating the operation of the switch handle.

Referring now more particularly to the drawing, the invention consists broadly of a cover plate 9, standard housing 10 of metallic character having a switch element 11 pivotally mounted in the housing 10, as clearly disclosed in Figures 2, 3, 4, and 5.

The switch element 11 is pivotally mounted at the point 12 and consists of a segment 14, as clearly disclosed in Figures 3, 4, and 5.

The segment 14 being pivoted at the point 12 isoperable in' either direction and normally closes the circuit when moved to the dot and dash position shown in Figure 5.

Referring now more particularly to Figure 5 it will be observed that the arcuate segment 14 is rotatable on the pivot point 12, and that said lever 16.

The actuating handle 15 is swingable or rotatable from right to left and said handle is under tension at all times.

The said handle is provided with a lever 16 pivotally connected at the point 17 to a forked arm 18. The arcuate section 14, actuating handle 15, and lever 16 are composed of a single piece of insulating material, as clearly disclosed in Figures 3, 4, and 5. Said forked arm 18 consisting of elements 19, 20, and 21; the central element 21 thereof acting as a lever and held under tension by means of the spring 22.

The elements 19 and 20 are provided with balls 23 and 24 which act as anti-friction means for the operation of the switch element 11. Normally the switch handle is held under tension by means of the spring 22.

It will be observed in this connection that, as disclosed in Figure 5, the operating handle is shown in full lines in inoperative position, while in dot and dash lines the same is shown in operative position.

The electrical circuit comprises the usual leads 25 and 26 enclosed in the conduit 27 and held by the binding posts 29 and 30, as clearly disclosed in Figures 2 and 3.

The switch mechanism is enclosed in a housing 31, of the usual insulated character, as clearly disclosed in Figures 2, 3, and 4.

The buss bars 32 and 33 are mounted on the housing 31, and as disclosed in Figures 3 and 5, the said bars are inclined as disclosed, so that the balls travel upwardly thereon when the switch handle is actuated.

It is obvious with reference to Figure 5, that the spring 22 is held under tension by means of the element 21, and that when the operating handle 15 is actuated, the arms 19-20 and balls 23-24 travel upwardly on the inclined track or contact plates, as clearly shown in Figure 5. In this connection it will also be observed that the device is substantially noiseless, due to the fact that the balls 23 and 24 frictionally engage the inclined elements and travel upwardly thereon.

A central bar 32, Figures 3, 4, and 5, provides means for slidingly holding the spring 22 under tension; also the actuating handle.

The principal object of the invention is the provision of a device of the class described that embodies means for its silent and eflcient operation, this function being taken care of by the balls and the inclined track mechanism.

The switch handle is normally held under tension by means of the spring 22, which spring is secured to the arm 18. and is carried by n. yoked pulley 35, as clearly disclosed in Figures 3 and 5.

These elements as above described constituting a trolley mechanism adapted to travel along the bar 32 to maintain the ball members 23 and 24 in contact With the bus bars 32 and 33.

I claim and desire to secure by Letters Patent of the United States the following:-

l. In a switch mechanism of the class described, a casing, a fixed element and a reciprocable element mounted in said casing, inclined buss bars mounted in said xed element, said reciprocable element including a segment having a forked linked connection thereto, anti-friction means carried by said connection and adapted to normally contact said bus bars, and a spring controlled trolley mechanism connected to said linked connection to normally hold said antifriction means in contact with said bus bars.

2. In a switch mechanism of the class described, a casing, a xed element and a reciprocable element mounted therein, inclined bus bars mounted in said fixed element, said reciprocable element including a swingable segment having a link connection, a forked element pivoted to said link connection, anti-friction elements carried by said forked element and adapted to contact said bus bars, a trolley mechanism arranged in said Xed element, and a coil spring connecting Said trolley mechanism and said forked element whereby spring tension is maintained to cause the anti-friction elements to contact said bus bars and also to constantly maintain tension on said segment.

FRANK POLI.

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