Double-pole rocker switch with thermal protection

Details Double-pole rocker switch with thermal protection Double-pole rocker switch with thermal protection

1979-09-05

1981-03-24

Beha, Jr., William H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337 59, 337113, H01H 7116, H01H 7306

Patent

active

042583497

ABSTRACT:
A double-pole rocker switch with thermal overload protection is constructed as a fully functional sub-assembly which may be tested and adjusted prior to insertion in a tubular housing. The sub-assembly is held in the housing by releasable locks for subsequent servicing. All component elements of the switch are carried on the sub-assembly, including all electrical contacts. In particular, the sub-assembly has a base in which two pairs of electrical contacts are fixedly disposed, each pair being contacted by a spring-loaded contact bridge in one position of the rocker. This position can be attained, however, only if a movable contact block is held at one end by a fulcrum provided by a latch. The latch pivots in a V-shaped groove and may be removed from engagement with the contact block by a bimetallic strip under conditions of overload. In that condition, even deliberate actuation of the rocker cannot result in a closure of the switch because of the absence of the fulcrum.

REFERENCES:
patent: 2668206 (1954-02-01), Edmunds
patent: 2866026 (1958-12-01), Bingenheimer
patent: 3143617 (1964-08-01), Ellenberger
patent: 3475711 (1969-10-01), Stokes

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