Electrothermally actuated switch

Details Electrothermally actuated switch Electrothermally actuated switch

1983-12-01

1985-05-28

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With longitudinally expansible solid element

337107, H01H 6106, H01H 7118

Patent

active

045203369

ABSTRACT:
A thermally responsive shape memory effect (SME) element (4) is positioned adjacent a fixed heater (40) for moving away from the heater to a switch actuating "memory" position as current induced temperature increases, thereby establishing changes in heat transfer coefficient between the heater (40) and thermally responsive element (4) for each increment of movement. An intermediate switch actuating lever (22) is carried on a movable range adjustment lever (16) to vary pretravel of an SME driven plunger (12). The SME element is resettable against a fixed stop (2c) for achieving accurate repetitive resetting of the device.

REFERENCES:
patent: 3478292 (1969-11-01), Carter et al.
patent: 3566328 (1968-05-01), Carter et al.
patent: 3800260 (1974-03-01), Woodger
patent: 4275370 (1981-06-01), Sims
patent: 4365225 (1982-12-01), Olsen et al.

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