Electrical devices

Details Electrical devices Electrical devices

1981-03-11

1983-03-08

Shepperd, John W.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 1B, 200 5A, H01H 1352

Patent

active

043762387

ABSTRACT:
A membrane switch assembly in which portions of a membrane 14 mounted on a base member 11 are belled-outwardly to provide cavities 15, which are positioned so as to overly the location at which conductors 21, 22 are to be connected. The formation of each belled out portion is such that each portion carries electrical contactor means 16, 20 and such that the portion has a circumscribing region 18 which on compression of the portion to cause switch operation allows the membrane 14 to collapse at this region before the membrane is fully compressed.

REFERENCES:
patent: 3898421 (1975-08-01), Suzumura
patent: 3917917 (1975-11-01), Murata
patent: 3996429 (1976-12-01), Chu et al.
patent: 4084071 (1978-04-01), Smith

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