Circuit breaker

Details Circuit breaker Circuit breaker

2005-03-08

2005-03-08

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

C335S172000, C335S202000

Reexamination Certificate

active

06864765

ABSTRACT:
A circuit breaker includes a housing; separable contacts mounted in the housing; and an operating mechanism for opening and closing the separable contacts. An overcurrent assembly is responsive to selected conditions of current flowing through the separable contacts and actuates the operating mechanism to trip open the separable contacts. A bonnet forms a U-shape which surrounds the separable contacts and which cools and splits an arc when the operating mechanism trips open the separable contacts. A first bonnet piece forms a first leg of the bonnet, and a second bonnet piece forms a second leg and a base of the bonnet.

REFERENCES:
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patent: 2082630 (1937-06-01), Hill
patent: 2723326 (1955-11-01), Bank et al.
patent: 2912546 (1959-11-01), Arey
patent: 2986620 (1961-05-01), Bullock et al.
patent: 3792403 (1974-02-01), Bullock
patent: 4812799 (1989-03-01), Cobb et al.
patent: 5224006 (1993-06-01), MacKenzie et al.
patent: 5459446 (1995-10-01), Vidal et al.
patent: 5691869 (1997-11-01), Engel et al.
patent: 1440231 (1966-05-01), None

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