Circuit breaker with molded cam surfaces

Details Circuit breaker with molded cam surfaces Circuit breaker with molded cam surfaces

1995-03-30

1996-07-09

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

335185, 335 8, H01H 900

Patent

active

055348351

ABSTRACT:
A current limiting circuit breaker including novel clutch arrangements between the contact arms of the circuit breaker and the crossbar. The clutch arrangements include cam surfaces formed on the crossbar from plastic and a cam follower attached to each contact arm. A cam surface is located on each side of each contact arm and each surface may be formed integrally with an insulating barrier. To reduce wear on the cam surfaces, each cam follower includes a roller which contacts the respective cam surface. The cam surfaces are configured to permit the contact arms to blow open under unacceptable fault conditions even though the crossbar remains stationary.

REFERENCES:
patent: 4488133 (1984-12-01), McClellan et al.

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