Molded case circuit breaker with an improved contoured cradle

Details Molded case circuit breaker with an improved contoured cradle Molded case circuit breaker with an improved contoured cradle

1985-07-18

1987-02-10

Schroeder, Werner H.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 346

Patent

active

046424300

ABSTRACT:
A molded case circuit breaker includes a highly integrated operating mechanism having an over-center toggle mechanism for opening and closing a pair of separable electrical contacts. A pivotable, one-piece cradle coupled to the breaker handle includes a cradle latch surface for latching with a trip arm of a trip mechanism, a contact stop surface for limiting the movement of one of said electrical contacts and an arcuate cam surface for engaging a cradle cam pin during a reset operation. The arcuate cam surface of the cradle is contoured to enable the resetting of the operating mechanism after a trip operation by applying a relatively low, substantially constant reset force to the breaker handle.

REFERENCES:
patent: 3155803 (1964-11-01), Klein et al.
patent: 3621189 (1971-11-01), Link
patent: 3935409 (1976-01-01), Koval
patent: 4273979 (1981-06-01), Berndt et al.
patent: 4283610 (1981-08-01), Date et al.
patent: 4321440 (1982-03-01), Fujiwara et al.
patent: 4358650 (1982-11-01), Norden
patent: 4392036 (1983-07-01), Troebel et al.

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