Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Tripping means
Patent
1990-11-14
1992-02-18
Tolin, Gerald P.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Tripping means
335190, H01H 900
Patent
active
050897977
ABSTRACT:
A circuit breaker embodies with a single electromagnetically actuated plunger two levels of actuation, corresponding to two levels of excessive current or voltage defined by two different airgaps, one at the lower level for triggering the toggle mechanism, the other at the higher level for directly actuating the movable arm through a kicker arm. The preferred embodiment provides a double-ended lever pulled by the plunger at midpoint for actuating the trip bar, and the kicker arm is actuated in an overriding situation by the lever rotating about the trip bar blocked at the end of its initial move.
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patent: 3638157 (1972-01-01), Kruzic
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patent: 4503408 (1985-03-01), Mrenna
patent: 4654614 (1987-03-01), Chien
patent: 4697163 (1987-09-01), Grunert
patent: 4725799 (1988-02-01), Bratkowski
patent: 4808952 (1989-02-01), Berner et al.
Gibson Jeffrey S.
Grunert Kurt A.
Wafer John A.
Donovan Lincoln
Moran M. J.
Tolin Gerald P.
Westinghouse Electric Corp.
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