Stem mechanism for a watch

Details Stem mechanism for a watch Stem mechanism for a watch

1975-12-22

1978-11-28

Schaefer, Robert K.

58 855, 58 90B, 58 63, G04B 3700

Patent

active

041269926

ABSTRACT:
A winding stem mechanism including a winding shaft having a detent portion comprised of a pair of annular peripheral recesses with an annular step portion therebetween, and a pair of annular stops each adjacent a respective one of the recesses, and mounted for rotation and for being axially slidable. A resilient spring-like member normally engages a first of the recesses to define a normal position of the shaft and when the shaft travels in a first axial direction the spring-like member climbs the annular step portion to engage the second of the recesses. When the shaft travels in a second axial direction it pushes the annular stop adjacent the first recess to flex the spring-like member to permit the shaft to travel to a second operating position and flex in a direction effective to bias the shaft back from the second operating position to the normal position when the shaft is released.

REFERENCES:
patent: 2985997 (1961-05-01), Rabinow
patent: 3678682 (1972-07-01), Miyasaka et al.
patent: 3765164 (1973-10-01), Esselborn
patent: 3846971 (1974-11-01), Ho et al.
patent: 3849977 (1974-11-01), Hirose et al.
patent: 3874162 (1975-04-01), Boxberger et al.
patent: 3935700 (1976-02-01), Van Haaften
patent: 3978296 (1976-08-01), Moriya et al.
patent: 4034553 (1977-07-01), Wuthrich

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