Push-pull switch for use in an electronic watch

Details Push-pull switch for use in an electronic watch Push-pull switch for use in an electronic watch

1976-01-20

1977-06-28

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Reciprocating contact

200153K, 200159R, 200165, H01H 1524, H01H 1352

Patent

active

040327310

ABSTRACT:
A push-pull switch employs a coil spring contained in an internal chamber in a housing and surrounding a reduced central portion on a stem passing through the chamber. The spring is interposed between a pair of washers slidably receiving the central portion of the stem for urging the washers apart and into engagement with the opposite ends of the chamber. Each washer abuts a shoulder on the stem where the reduced portion thereof joins the remainder of the stem so that axial movement of the stem in either direction sufficient to bridge either of two pairs of contacts, imparts displacement to one or the other of the washers and hence to the spring. The stem is biased by a single spring into a central position at which both pairs of contacts are open.

REFERENCES:
patent: 1679846 (1928-08-01), Warner
patent: 1807398 (1931-05-01), Fleek
patent: 1833948 (1931-12-01), Lansing
patent: 1910645 (1933-05-01), Soreng
patent: 2441888 (1948-05-01), Lansing
patent: 2748204 (1956-05-01), Woods et al.
patent: 3119915 (1964-01-01), Stites
patent: 3258548 (1966-06-01), Cartier et al.
patent: 3488464 (1970-01-01), Hocking
patent: 3678235 (1972-07-01), Anderson
patent: 3703621 (1972-11-01), Viola et al.
patent: 3800112 (1974-03-01), DuRocher

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