Two-stage temperature switch

Details Two-stage temperature switch Two-stage temperature switch

1978-12-29

1981-12-15

Broome, Harold

Electricity: electrothermally or thermally actuated switches

With separate distinct diverse art-type switching device

337107, H01H 3700, H01H 6100

Patent

active

043062105

ABSTRACT:
An electrical switch assembly including two separate, temperature-dependent electrical switches, one of the electrical switches being substantially mechanically acting and the second of the electrical switches being a non-mechanical, solid-state switch. The mechanical switch may be a bimetallic switch of various configurations or may consist of a snap or toggle switch actuated by the expansion of a suitable fluid, for example a wax mixture. The solid-state switch element may be a resistive element which inhibits the electrical conduction upon the occurrence of elevated or lowered temperature, depending on the type of material used. Various embodiments of the mechanical portion of the switch assembly are presented.

REFERENCES:
patent: 2321852 (1943-06-01), Ray
patent: 2759066 (1956-08-01), Short et al.
patent: 3386067 (1968-05-01), Costanzo
patent: 3840834 (1974-10-01), Obenhaus et al.
patent: 4038627 (1977-07-01), Johnson
patent: 4044348 (1977-08-01), Huebscher

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