Horology: time measuring systems or devices – Cases – With protection means
Patent
1993-02-03
1995-01-17
Miska, Vit W.
Horology: time measuring systems or devices
Cases
With protection means
368319, G04B 3700, G04B 2900
Patent
active
053831667
ABSTRACT:
A watch control device comprises a crown with a central cavity surrounded by an annular cavity in the bottom of which is formed a groove. The lateral external face of the annular cavity has a thread adapted to be screwed onto a thread formed on the lateral external face of an external part of a tube screwed into a watch casing. An injected thermoplastic elastomer seal is disposed in the annular cavity. This seal comprises two parts of the same external diameter, but of different internal diameter, the portion of greater diameter engaging in the groove and the portion of smaller diameter being that on which the tube acts in the screwed up position of the crown.
REFERENCES:
patent: 3499281 (1970-03-01), Denley et al.
patent: 3621649 (1971-11-01), Vulcan et al.
patent: 4626108 (1982-12-01), Ganter
Miska Vit W.
Montres Rolex S.A.
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