Snap-acting thermally responsive actuators

Details Snap-acting thermally responsive actuators Snap-acting thermally responsive actuators

1978-01-31

1979-07-03

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With bimetallic element

337111, H01H 3752

Patent

active

041602269

ABSTRACT:
A snap-acting thermally responsive actuator comprises a bimetal sheet having a U-shaped aperture defining a tongue, the sheet having been deformed to a domed configuration in a die pressing operation so that the actuator reverses its curvature with a snap-action with changes in temperature. The actuator may carry an electrical contact and have sufficient resistance so that current through the actuator heats the actuator to its operating temperature. The electrical resistance may be increased by forming additional apertures in the actuator.

REFERENCES:
patent: 1883249 (1932-10-01), Spencer
patent: 1988345 (1935-01-01), Vaughn
patent: 2863024 (1958-12-01), Romine
patent: 3110788 (1963-11-01), Welsh
patent: 3139500 (1964-06-01), Fallon et al.
patent: 3275773 (1966-09-01), Grover
patent: 3388226 (1968-06-01), Willcox

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