Circuit breaker

Details Circuit breaker Circuit breaker

1976-12-03

1978-05-16

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 25, 335 26, H01H 7312

Patent

active

040901580

ABSTRACT:
A circuit breaker comprising stationary contact means connected to power source terminal means, load terminal means, a movable lever swingably supported at a portion thereof and having, at one free end thereof, movable contact means connected to the load terminal means and normally brought into contact with the stationary contact means, current sensing means for producing a first signal when detecting an overload current and a second signal when detecting a short-circuit current, overload current responsive means for separating the movable contact means of the movable lever from the stationary contact means in response to the first signal, short-circuit current responsive means for actuating the overload current responsive means in response to the second signal, means for effecting a short-circuit indication in response to actuation of the short-circuit current responsive means, and means for holding the actuation of the short-circuit current responsive means in response to actuation of the short-circuit current responsive means.

REFERENCES:
patent: 2343548 (1944-03-01), Graves, Jr.
patent: 3083359 (1963-03-01), Smith
patent: 3365682 (1968-01-01), Fujita
patent: 3388357 (1968-06-01), Lawson et al.

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