Movable contact arm assembly for a current limiting circuit brea

Details Movable contact arm assembly for a current limiting circuit brea Movable contact arm assembly for a current limiting circuit brea

1985-09-24

1986-08-26

Goldberg, E. A.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335147, 335190, 335192, 335194, 335195, 335 15, 200147R, H01H 7500, H01H 7700, H01H 8300

Patent

active

046085459

ABSTRACT:
A movable contact arm assembly is provided for a circuit breaker. The contact assembly includes a carrier which has first and second guide plates with aligned roller guides and bracket supports and a roller which has a middle portion extending between the guide plates and the end portions and engaging the roller guides. A bracket extends between the guide plates and engages the bracket supports. A spring is positioned between the bracket and roller which urges the roller along the roller guide. The contact arm has first and second cam surfaces and is positioned between the guide plates and pivotally connected thereto. The roller rides in the guide on the first and second cam surfaces and the roller moves from the first cam surface to the second cam surface as the contact arm moves from a closed position to an open position in response to preselected electromagnetic repulsion forces.

REFERENCES:
patent: 3198924 (1965-08-01), Brumfield et al.
patent: 3564184 (1971-02-01), Gauthier et al.
patent: 4480242 (1984-10-01), Castonguay et al.
patent: 4484164 (1984-11-01), McClellan et al.
patent: 4488133 (1984-12-01), McClellan et al.
patent: 4491814 (1985-01-01), Bellows
patent: 4562419 (1985-12-01), Preuss et al.

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