Controlled cycling thermal protector

Details Controlled cycling thermal protector Controlled cycling thermal protector

1988-07-15

1989-04-18

Broome, H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337107, 361105, H01H 6102, H01H 7116

Patent

active

048231045

ABSTRACT:
A controlled cycling thermal protector device is provided comprising a snap blade and a PTC resistive heater disposed outside of a bulbous envelope in which the snap blade thermal protector is housed. The snap blade thermal protector and the resistive PTC heater are wired and constructed so as to prevent cycling of the snap blade thermal protector. The PTC heater is disposed upon a sleeve which encircles the bulbous envelope so as to radiate heat onto the snap blade thermal protector to keep it open once the circuit has been broken.

REFERENCES:
patent: 3272944 (1966-09-01), Ricker et al.
patent: 4287500 (1981-09-01), Ueda

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