Circuit breaker with improved trip means

Details Circuit breaker with improved trip means Circuit breaker with improved trip means

1974-10-29

1976-04-13

Harris, G.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 37, 337 71, H01H 7312

Patent

active

039507157

ABSTRACT:
A circuit breaker comprises improved thermal and electromagnetic trip means comprising a currrent carrying bimetal operable upon the occurrence of lesser overloads to effect time-delay thermal tripping operations, and electromagnetic means energized by the current in said bimetal which electromagnetic means is operable upon the occurrence of more severe overloads to effect instantaneous electromagnetic tripping operations.

REFERENCES:
patent: 2619561 (1952-11-01), Swingle
patent: 2902560 (1959-09-01), Stanback et al.
patent: 3213249 (1965-10-01), Ellsworth et al.
patent: 3278707 (1966-10-01), Klein
patent: 3278708 (1966-10-01), Casey et al.

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