Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1981-06-23
1983-07-12
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200147R, H01H 3308, H01H 3310
Patent
active
043932886
ABSTRACT:
An improved circuit breaker utilizing the combination of a pair of composition sheets and a channel. The sheets reside alongside opposing interior surfaces of a molded insulated housing and are held in place within recesses formed therein. The sheets are formed of material comprising a water-insoluble binder and an arc-suppressing substances selected from the class consisting of the oxides and hydrates of aluminum and magnesium, the binder constituting at least ten percent of the composition. The channel comprises an integral, generally U-shaped member forming a base and opposing side walls. One end of the side walls has extending widths to provide enlarged surfaces for engaging the composition sheets. Both ends of the base are formed with a tab for engaging a molded feature within the circuit breaker housing. The tabs and the composition sheets space the channel away from the interior surfaces of the housing, thereby exposing surfaces of the channel not in contact with the sheets. The base has venting holes. The sheets physically contact the extending widths of the channel, but do not physically engage a majority of the length of the channel. The sheets, in addition to having arc suppression characteristics, support the channel away from the molded housing, and thermally insulate the channel from the housing.
REFERENCES:
patent: 2645693 (1953-07-01), Cole et al.
patent: 2816990 (1957-12-01), Gelzheiser
patent: 2898427 (1959-08-01), Nadeau
Fisher Fred
GTE Products Corporation
Macon Robert S.
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