US442030A - Electric switch - Google Patents

Description

(No Model.)

15'. EIPISHER. ELECTRIC SWITCH. No. 442,030. Patented Dec. 2, 1890.

as MtQMtOZ UNITED STATES PATENT OFFICE.

FRANK E. FISHER, OF DETROI", MICHIGAN.

ELECTRIC SWITCH.

SPECIFICATION forming part of Letters Patent No. 442,030, dated December 2, 1890.

Application filed July 7,. 1890. Serial No. 357,957. (No model.)

To all whom, it may concern.-

Be it known that I, FRANK E. FISHER, of Detroit,in the county of Wayne and State of Michigan, have invented a new and useful Improvement in Electric Switches, of which the following is a specification.

My invention consists in an electric switch, hereinafter full described and claimed.

Figure l is a plan View; Fi 2, a section 011 line Y Y, Fig. 1; and Fig. 3 is a cross-section on line X X, Fig. 1.

N represents a block of wood, to which the switch and contact-plates are secured.

I-I represents a base having side walls F, to which is pivoted a yoke J, the end of which is slotted to form jaws J, in which is secured a bar K, preferably formed of insulating material.

P represents a spring under yoke J, tending to force the same upward.

A represents a bell-crank lever pivoted at the point Bin base H, its short arm being represented by O.

E represents a lug on the upper surface of yoke J.

D represents a link, one end of which is pivoted 011 arm C, and L L represent springplates secured to the lower side of bar K and extending up the sides of said bar, as shown in Fig. 3.

M represents terminal fastenings, of which there may be two, or four in opposite pairs, each provided with a binding-screw S to secure the end of a conductor Q R, and the spring-plates L are adapted to crowd between the fasteningsM and make connection between conductors Q B when the apparatus is in the position shown in the drawings. In this position the pivot Band the pivots at the two ends of the link D are nearly in a line, so that the bar K is locked in the position shown, and the spring P is unable to raise it; but the moment the end of lever A is forced to the right, Fig. 2, this lock is broken and the spring P immediately throws the bar K upward, thus breaking the switch. hen the bar K is forced downward in position to connect the terminals M, its motion is checked by the lever A coming in contact with the stop G on the base H, as shown in Fig. 2.

What I claim as my invention, and desire to secure by Letters Patent, is

1. An electric switch composed of the pivoted yoke J, carrying the insulating-bar K and contact-plates L, the spring P, and bell- 55 crank lever A, pivotally connected with said yoke, substantially as shown and described.

2. In an electric switch, the combination of the bell-crank lever A 0, link D, pivoted bar K, and terminals M, substantially as shown 60 and described.

FRANK E. FISHER.

Witnesses,

HENRY B. LOTHROP, GERTRUDE H. ANDERSON.

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