Circuit breaker with improved contact arm follower spring arrang

Details Circuit breaker with improved contact arm follower spring arrang Circuit breaker with improved contact arm follower spring arrang

1995-03-30

1996-04-02

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

335 10, 335190, H01H 900

Patent

active

055044670

ABSTRACT:
A current limiting circuit breaker including a novel spring arrangement between the contact arms of the circuit breaker and the crossbar. The spring arrangement includes a single spring which holds the cam follower attached to each associated contact arm in contact with cam surfaces of the crossbar. The longitudinal axis of the spring is located within a plane passing through the longitudinal axis of the contact arm, wherein the plane is also perpendicular to the rotational axis of the contact arm. The cam surfaces and spring are configured to permit the contact arm to blow open under unacceptable fault conditions even though the crossbar remains stationary.

REFERENCES:
patent: 4342974 (1992-08-01), Nakano et al.
patent: 4350965 (1982-09-01), Norden
patent: 4382240 (1983-05-01), Kondo et al.
patent: 4488133 (1984-12-01), McClellan et al.

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