Vented membrane switch with contaminant scavenger

Details Vented membrane switch with contaminant scavenger Vented membrane switch with contaminant scavenger

1981-12-28

1982-12-21

Shepperd, John W.

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

200159B, 200 5A, H01H 1352, H01H 902

Patent

active

043651305

ABSTRACT:
A membrane switch, which is vented to equalize air pressures within and outside the switch, includes a scavenger material in the vent passage selected to react with airborne contaminants and prevent or substantially reduce their passage into the area of the switch contacts.

REFERENCES:
patent: 3898421 (1975-08-01), Suzumura
patent: 3995126 (1976-11-01), Larson
patent: 3995128 (1976-11-01), Hawkins
patent: 4033030 (1977-07-01), Robinson et al.
patent: 4046975 (1977-09-01), Seeger
patent: 4066855 (1978-01-01), Zenk
patent: 4249044 (1981-02-01), Larson

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