Temperature switch

Details Temperature switch Temperature switch

1985-01-07

1987-06-23

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With longitudinally expansible solid element

337393, H01H 3732

Patent

active

046756426

ABSTRACT:
A temperature switch has an expansion element which consists of a metal alloy in which a martensitic structural transformation takes place within its working region, the phases concerned, austenite and martensite, having ordered lattice structures and the slightest possible difference in form. The expansion element preferably has the shape of a coil compression spring (7) which rests at one end against a bottom surface (9) of the housing (1) of the temperature switch and at the other end against a ram (4). This ram (4) serves to actuate a snap-switch mechanism (3) by which a switch contact (5) can be switched for movement against a fixed contact (6) or away from it.

REFERENCES:
patent: 3594674 (1971-07-01), Willson
patent: 3676815 (1972-07-01), Du Rocher
patent: 4275370 (1981-06-01), Sims
patent: 4356478 (1982-10-01), Muggli et al.
patent: 4520336 (1985-05-01), Hastings et al.

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