Thermal shield for circuit breaker operating spring

Details Thermal shield for circuit breaker operating spring Thermal shield for circuit breaker operating spring

1982-03-01

1984-02-14

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200304, H01H 3302

Patent

active

044318774

ABSTRACT:
A thermal shield is employed with a circuit breaker operating spring to protect the spring from thermal degradation during contact arcing. One embodiment includes an ablative plastic coating on the outer surface of the shield to promote arc quenching.

REFERENCES:
patent: 537130 (1895-04-01), Sperry
patent: 2183612 (1939-12-01), Gubin
patent: 2759075 (1956-08-01), Hults
patent: 3123691 (1964-03-01), Burton
patent: 4011420 (1977-03-01), Heft
patent: 4199740 (1980-04-01), Woods
patent: 4266210 (1981-05-01), Mrenna et al.

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