Push-button switch

Details Push-button switch Push-button switch

1985-02-20

1986-06-24

Marcus, Stephen

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

200340, 200159B, H01H 1306

Patent

active

045969124

ABSTRACT:
A push-button switch for use in the keyboard of an electronic typewriter, word processor, or the like comprises a casing, a stem extending through the casing for operating a movable contact, a top cover mounted on the outer end of the stem, a cylinder of an elastomeric material disposed between the top cover and the casing and loosely mounted on the outer periphery of the stem, and a circular retaining plate protruding from the outer end of the stem. The cylinder which biases the stem upward is resiliently mounted between the retaining plate and the casing, whereby the cylinder is maintained in a fixed condition.

REFERENCES:
patent: 3731014 (1973-05-01), Brady
patent: 3937913 (1976-02-01), Soulas et al.
patent: 4452061 (1984-06-01), Tamura
IBM Technical Disclosure Bulletin, R. J. Wolfrom, Adjustable Key Force Control, vol. 18, No. 10, Mar. 1976.

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