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Publication numberUS1069531 A
Publication typeGrant
Publication dateAug 5, 1913
Filing dateDec 23, 1911
Priority dateDec 23, 1911
Publication numberUS 1069531 A, US 1069531A, US-A-1069531, US1069531 A, US1069531A
InventorsLloyd Groff Copeman
Original AssigneeLloyd Groff Copeman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric switch.
US 1069531 A
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Description  (OCR text may contain errors)




1,069,531 Patented Aug. 5, 1913.

717- 77 eases" v [fig an far Zia v 1. G'roff Copeman /M V W LLOYD GEOFF COPEMAN, OF FLINT, MICHIGAN.


Specification of Letters Patent.

Patented Aug. 5,1913.

Application filed December 23, 1911. Serial No. 667,529.

T 0 all whom it may concern:

Be it known that I, LLOYD GEOFF COPE- MAN, a citizen of the United States of Amer ica, residing at Flint, in the county of Gen esee and State of Michigan, have invented certain new and useful Improvements in Electric Switches, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to electric switches being more particularly designed for use in connection with automatically operating switch closing mechanism.

It is the object of the invention to obtain a simple construction of snap switch which may be set in the path of the actuating member so that a slight movement will cause it to snap closed.

In the drawings, Figure 1 is a longitudinal section through the switch as arranged in connection with a time controlled switch actuating mechanism; Fig. 2 is a perspective view of the switch.

A is a base of any suitable construction, B and C are the contact members mounted on said base, and D are the blades of the knife switch hinged to the contacts 0 and adapted to close with the contacts B.

E is' the insulator cross bar between the blades and F is the actuating handle. Attached to the cross bar E is an outwardly projecting finger G to which is attached a spring H. The other end of this spring is attached to a hook I which is mounted upon the base intermediate the knife blades. The

location of the points of attachment is such that when the blades of the switch are open or out of contact with the members B, the sprin H will be in the plane of the axis of the hinge, and therefore, will have no tendency to move the blades in either direction. If however, the blades are moved a slight distance beyond this neutral position the tension of the spring will at once be exerted to snap the switch closed.

As shown in Fig. 1, J indicates a rotatable arm secured to a clock or other timed mechanism (not shown), and which when actuated will pass through an orbit into which the handle F of the switch projects. Thus the movement of the member J will actuate said handle F sufficiently to throw the spring H over from its neutral position, whereupon the switch will snap closed.

The construction can be applied to any ordinary or standard construction of knife switch and involves but very slight additional expense.

l Vhat I claim as my invention is:

1. A switch comprising an insulator base, pairs of contacts mounted thereon, a pair of knife blades hinged to two of said contacts and adapted to bridge with the operating contacts, an insulator cross-bar connecting said knife blades, a projection extending rearwardly from and carried by said crossbar, a spring attached to the outer end of said projection, spring secured to said base, said projection being of a length'to aline the spring with the axis of the blades when the latter are in slightly open position.

' 2. A switch comprising an insulator base, pairs of contacts mounted thereon, a pair of knife-edge blades hinged to two of said conand an anchor for said tacts and adapted to bridge with the operating contacts, an insulator cross-bar connecting sa1d knife-edge blades, a handle secured to said cross-bar, a spring anchored. at one end of the base intermediate the knlfe blades and to the rear of the axis thereof, a handle LLOYD GEOFF COPEMAN.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2500174 *Sep 25, 1947Mar 14, 1950Ralph Charles GradenThermostatically controlled electric circuit closer
US3194930 *Oct 16, 1962Jul 13, 1965Square D CoKnife switch with closure resisting and shielding spring
U.S. Classification200/554, 200/35.00R
Cooperative ClassificationH01H1/42