Thermal switch

Details Thermal switch Thermal switch

1988-08-29

1989-08-29

Broome, H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337365, 337377, H01H 6102, H01H 7116

Patent

active

048621331

ABSTRACT:
This invention provides a small-size thermal switch having a base formed of an electrically conductive plastic. The thermal switch is arranged such that, after a bimetallic element deflects in a reverse direction and opens the circuit of the thermal switch, the bimetallic element is self-held in such a reversely deflected state and the self-held state of the bimetallic element is maintained until an electrical power source is switched off. This invention further provides a thermal switch in which one surface of its movable-contact leaf spring is maintained in contact with the surface of its bimetallic element which is formed of a metal having the lower coefficient of expansion. Since the bimetallic element is sandwiched between the base and the movable contact, the stability of the bimetallic element in a recess of the base is improved.

REFERENCES:
patent: 3307111 (1967-02-01), Braun
patent: 3495150 (1970-02-01), Enemark
patent: 4039992 (1977-08-01), Givler

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