Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Tripping means
Patent
1976-05-07
1978-02-14
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Tripping means
335 42, 335274, H01H 900
Patent
active
040742180
ABSTRACT:
A circuit breaker responsive to abnormal currents in conductors of an electrical distribution system characterized by separable contacts and trip means therefor, which means comprises a stationary magnetic structure for each conductor including a magnetic coil and core assembly and armature therefor, a lever associated with each stationary magnetic structure removing a trip bar to an unlatched position, the lever comprising the armature and being movable in response to abnormal currents in at least one of the conductors, and tension means for varying tension on the lever and including a manually operable cam, cam follower, and tension spring operatively connected between the cam follower and the lever for adjusting the force required to attract the armature to said assembly.
REFERENCES:
patent: 3391361 (1968-07-01), Jencks et al.
patent: 3797007 (1974-03-01), Salvati et al.
patent: 3845432 (1974-10-01), Heberlein
patent: 3906414 (1975-09-01), Kidd et al.
Salvati John G.
Skalka Paul
Broome Harold
Johns L. P.
Westinghouse Electric Corporation
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