Push-piece crown for a timepiece

Details Push-piece crown for a timepiece Push-piece crown for a timepiece

1994-10-21

1996-05-28

Roskoski, Bernard

Horology: time measuring systems or devices

Crown or stem details

368321, G04B 2900

Patent

active

055218903

ABSTRACT:
A push-piece-crown (1) mounted on a guide tube (T) secured in a case (C) housing a timepiece, and fixed in rotation as well as axially to a control stem (TR) adapted to occupy at least two axial positions, of which a first ("0") is stable and a second ("-1") is transitory, comprising a head (2) fixed to said stem and mounted to be axially movable on said tube (T), and a return spring (8) bearing at one end on said head (2) for urging it towards said stable position, in which said spring (8) also bears at its other end on an annular abutment (9) movable within said head (2) between said stable position, in which said abutment (9) bears on a shoulder (13) on the interior of said head (2) and said transitory position, in which the abutment (9) rests on a shoulder (E3) of said tube (T).

REFERENCES:
patent: 4313187 (1982-01-01), Waki et al.
patent: 4346464 (1982-08-01), Wenger
patent: 4451719 (1984-05-01), Lauterburg et al.
patent: 5257247 (1993-10-01), Miche et al.

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