Push button switch for electronic watch

Details Push button switch for electronic watch Push button switch for electronic watch

1974-11-11

1976-08-03

Schaefer, Robert K.

Electricity: circuit makers and breakers

Liquid contact

Time delay

58 855, 200264, 200302, H01H 312

Patent

active

039730999

ABSTRACT:
A push button switch for setting the time display of electronic timepieces utilizes a conductive elastomeric material such as silver filled silicone rubber as a conductive spring in its moving contact. The elastomer biased contact may be seated in a port in the watch frame and bonded thereto to make the frame waterproof. Momentary electrical contact is secured by pressing the moving contact against a metal contact portion of the printed circuit time keeping substrate within the watch frame. The watch frame is electrically connected to ground in the electronic watch circuit.

REFERENCES:
patent: 2714284 (1955-08-01), Gazda
patent: 3089009 (1963-05-01), Korsgren
patent: 3767875 (1973-10-01), Schneikart et al.
patent: 3782102 (1974-01-01), Bergey
patent: 3789167 (1974-01-01), Seeger et al.

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