Self-extinguishing switch

Details Self-extinguishing switch Self-extinguishing switch

1979-09-04

1982-11-16

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200148G, H01H 3388

Patent

active

043596169

ABSTRACT:
A hollow cylindrical member includes a compression chamber and a reservoir partitioned by a circumferential step disposed on its inner wall surface and filled with an arc-extinguishing fluid. A piston loaded with a spring forms stationary contact and is slidably fitted into the compression chamber while the reservoir is connected to the exterior of the cylindrical member through a flared hole in an electrically insulating nozzle. A movable contact loosely extends through the nozzle to engage separably the piston. The stationary contact may be disposed in the reservoir while the piston serves as an arc contact. The spring may be replaced by a tulip-shaped member on the piston forced into a recess on the free end of the movable contact and leaving it upon the piston engaging the step.

REFERENCES:
patent: 2757261 (1957-07-01), Lingal et al.
patent: 2798922 (1957-07-01), Lingal et al.
patent: 3786215 (1974-01-01), Mauthe
patent: 4139752 (1979-02-01), Itai et al.

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