Push-button switch

Details Push-button switch Push-button switch

1975-03-03

1977-03-08

Schaefer, Robert K.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200276, 200 52R, H01H 312

Patent

active

040114228

ABSTRACT:
A push-button switch having an electrically conductive body forming a chamber, having a fixed contact supported in the chamber, having a passage communicating with the chamber, having a flexible diaphragm sealing said chamber from said passage, and having an operating member slidably movable in said passage for depressing the diaphragm, has a flat spiral spring disposed within the chamber with the perimeter of the spring in electrical engagement with the body and with a central portion of the spring disposed in selected spaced relation to the fixed contact between the fixed contact and the diaphragm for permitting movement of the operating member to depress the central portion of the flat spiral spring through the flexible diaphragm into electrical engagement with the fixed contact to close an electrical circuit between the fixed contact and the body.

REFERENCES:
patent: 884121 (1908-04-01), Apold
patent: 2916871 (1959-12-01), Wegner
patent: 3767875 (1973-10-01), Schneikart et al.
patent: 3946182 (1976-03-01), Holder

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