Electric switch having a sealed casing

Details Electric switch having a sealed casing Electric switch having a sealed casing

1974-08-07

1976-03-16

Scott, James R.

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

200306, H01H 904

Patent

active

039447740

ABSTRACT:
An electric switch having a sealed casing or a closed type switch wherein a breather hose has its one end opened to the interior of a closed contact chamber, so that the breathing action of the contact chamber due to its temperature change is made through the breather hose. An opening at the other end of the breathing hose is located in an outside atmosphere of good condition, whereby air of high humidity is prevented from intruding into the contact chamber.

REFERENCES:
patent: 1846841 (1932-02-01), Burnham
patent: 1916717 (1933-04-01), De Giers
patent: 2150859 (1939-03-01), Gibson et al.
patent: 2230277 (1941-02-01), Volker et al.
patent: 3336457 (1967-08-01), Julian et al.

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