Water-resistant device between an outside control member and a w

Details Water-resistant device between an outside control member and a w Water-resistant device between an outside control member and a w

1983-05-02

1985-03-05

Roskoski, Bernard

Horology: time measuring systems or devices

Cases

With protection means

368308, 368288, G04B 3700

Patent

active

045027919

ABSTRACT:
This device comprises a groove (6) made in the internal wall of a through hole (2) of the case (1) giving passage to the stem (3) of the winding crown (4). A gasket (8) is placed in the groove (6). The internal diameter of the gasket (8) is less than the outside diameter of the stem (3) of the winding crown and is thus compacted between the stem (3) and the groove (6). The stem (3) is comprised by an internally screw-threaded pedestal (3') secured to the winding crown (4) and an externally screw-threaded winding stem (3") screwed into the pedestal (3'). As a result, the hole (2) can be made of relatively small diameter, which is an important advantage in an extra-thin watch whose case is of relatively soft precious metal, because the tendency to bend the case, that would be present in the case of a large hole, is overcome.

REFERENCES:
patent: 3376701 (1968-04-01), Grohoski et al.

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