Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1975-09-12
1978-09-19
Harris, George
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337377, 338289, 338309, H01H 6102
Patent
active
041157508
ABSTRACT:
An improved bimetal actuator is disclosed. A thin film resistor is fixed to the high expansion side of a bimetal element and, when energized, generates sufficient heat to actuate the bimetal. The resistor has a serpentine configuration formed by a continuous series of loops, each successive loop having a greater width from the fixed to the free end of the bimetal, to provide differential heating of the bimetal and thus a greater movement of its free end for the power dissipated in the resistor.
REFERENCES:
patent: 2800555 (1957-07-01), Sundt
patent: 3316374 (1967-04-01), Nelson
patent: 3452314 (1969-06-01), Sapoff et al.
patent: 3842382 (1974-10-01), Bell
patent: 3921118 (1975-11-01), Ratzlaff
Hansen Niels Junior
Hintze William
Johnson David Charles
Ward John Ambrose
AMP Incorporated
Egan Russell J.
Harris George
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