Horology: time measuring systems or devices – Crown or stem details – Switch or detent
Patent
1983-12-22
1985-04-09
Roskoski, Bernard
Horology: time measuring systems or devices
Crown or stem details
Switch or detent
368320, 368190, 368187, G04B 2900
Patent
active
045098670
ABSTRACT:
An electronic timepiece movement includes a control stem slidably guided in a radial passage of a base plate. Pulling on this control stem brings a return spring acting on the stem into contact with a stud which is carried by the substrate of an electronic circuit module of the movement. This connects a conductive lead to ground, which controls an operation function of the timepiece. The pull-out control stem and associated return spring can be replaced by a push-in member and by a return coil spring located in said passage. The stud is then positioned in a hole of the substrate of the electronic circuit, which hole is situated opposite to the longitudinal axis of the passage. Pressure exerted on this push-in member places a portion thereof into electrical contact with the stud and this connects the lead to ground, as before. Thus, the movement can according to choice be completed for operation either by a push-in control movement or by a pull-out control stem movement.
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patent: 4319351 (1982-03-01), Fujimori
Cleusix Willy
Nikles Francois
Ebauches Electroniques S.A.
Roskoski Bernard
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