Electric circuit-breaker apparatus

Details Electric circuit-breaker apparatus Electric circuit-breaker apparatus

1974-10-23

1976-03-30

Caldwell, John W.

Communications: electrical

Systems

Call station

307127, 340253A, 340253Z, G08B 2100

Patent

active

039478599

ABSTRACT:
A remote-controlled circuit breaker apparatus has a pulse generator operable to provide a single output pulse. A change over switch is operable to select the polarity of the pulse applied to a conductor. A circuit breaker device has two electro-magnets arranged to be responsive to conductor pulses of respective opposite polarities to open and close the circuit breaker device. It is arranged that in the absence of a pulse, and with the circuit breaker device open a constant voltage signal appears on the conductor. A visual indicator is responsive to this signal to provide an open-circuit warning. The circuit breaker device also becomes open circuit in response to thermal overload, thereby causing the visual indicator to be energized.

REFERENCES:
patent: 1942135 (1934-01-01), Bushnell

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