Circuit breaker

Details Circuit breaker Circuit breaker

1976-06-24

1977-09-13

Hickey, Robert J.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

335 23, 335 27, 337 56, H01H 7348

Patent

active

040486079

ABSTRACT:
A circuit breaker has a bistable snap-acting mechanism including a bimetallic arm which renders the circuit breaker capable of actuation by either ambient temperature changes or temperature changes generated internally, as by an excessive electric current. An electromagnetic arrangement enables essentially instantaneous actuation in response to an electric current of predetermined amplitude greater than the excessive current which otherwise might actuate the circuit breaker thermally. An actuating lever assembly includes an actuating lever coupled to a link which is normally latched and is unlatched in response to movement of the bimetallic arm, and enables manual actuation, as well as manual reset of the circuit breaker.

REFERENCES:
patent: 2813946 (1957-11-01), Cox
patent: 3566318 (1971-02-01), Gelzheiser et al.
patent: 3936780 (1976-02-01), Hennemann

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