Rotatable trip test assembly for molded case circuit breakers

Details Rotatable trip test assembly for molded case circuit breakers Rotatable trip test assembly for molded case circuit breakers

1990-03-01

1991-01-01

Picard, Leo P.

Photocopying

Projection printing and copying cameras

Collapsible or portable

335 14, 335165, H01H 7302

Patent

active

049821733

ABSTRACT:
A rotatable trip test assembly unit for molded case circuit breakers consists of a unitary plastic part that cooperates with the internal structure of the circuit breaker cover to provide return spring bias to the trip test button. The trip test assembly unit rotates about a pivot and strikes the circuit breaker trip bar to thereby articulate the circuit breaker operating mechanism and separate the circuit breaker contacts. The interaction between a cam-follower on the assembly unit and a cam-shaped piece within the circuit breaker cover automatically returns the trip test button to its initial position upon release.

REFERENCES:
patent: 3214537 (1965-10-01), Krieger
patent: 3430164 (1969-02-01), Hurtle
patent: 3671890 (1972-06-01), Klein et al.
patent: 4023130 (1977-05-01), Ridler et al.
patent: 4740768 (1988-04-01), Morris et al.
patent: 4754247 (1988-06-01), Raymont et al.

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