Snap-ating mechanisms

Details Snap-ating mechanisms Snap-ating mechanisms

1975-05-16

1977-06-28

Smith, Jr., David

Electricity: circuit makers and breakers

Special application

Liquid or moisture responsive

200288, 337347, H01H 1336

Patent

active

040327345

ABSTRACT:
A snap-acting switch using a planar blade of resilient sheet metal which is stressed to an unstable condition such that with suitable stop members it will occupy two positions of stability. When motivated the blade will snap from one of the positions of stability to the opposite one. A pair of stop members (one or both of which may be electrical contacts) cooperate with the blade alternately as the latter changes in position. The stop members are displaced laterally from each other across the width of a resilient portion of the blade at or near one end thereof and are thus non-coaxial. The switch is an improvement of the switches shown, for example, in U.S. Pat. No. 3,213,228, maintains high electrical contact pressure up to the point of snap, and exhibits little or no contact bounce.

REFERENCES:
patent: 2179099 (1939-11-01), Nelson
patent: 2777032 (1957-01-01), Burch
patent: 2788419 (1957-04-01), Young
patent: 2859312 (1968-11-01), Dahlgren
patent: 2954447 (1960-09-01), Bolesky et al.
patent: 3098905 (1963-07-01), Anderson
patent: 3213228 (1965-10-01), Burch et al.
patent: 3803526 (1974-04-01), Andersen

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