Horology: time measuring systems or devices – Cases – Wrist worn
Patent
1996-12-09
1998-09-08
Roskoski, Bernard
Horology: time measuring systems or devices
Cases
Wrist worn
368282, G04B 3700
Patent
active
058055355
ABSTRACT:
The movable shutter device provided on a timepiece comprises stretchers in the form of oblong handles which are screwed onto a middle part of generally rectangular shape with flanks. The stretchers comprise a groove which is composed of a rectilinear portion followed on either side by a rounded portion, the latter giving on a groove which is formed by the surfaces of a protective plate connected to the back cover and by a flat portion of said back cover. The closed circuits formed by the grooves surround the middle part. The movable curtain formed by shutter axles which are interconnected on both sides by two rows of connecting links is slidable in said grooves by means of rollers made of rubies. In order to ensure that any intermediate position of the curtain between the two end positions is maintained, i.e. the completely open and the completely closed position, which are limited by a stop device, a brake device is provided which is accommodated in a hollow shutter axle, preferably near the first shutter axle having an actuating button, said brake device comprising an elastic member transmitting a thrust to the ruby rollers through brake axles. The protective plate may take the form of a grid or be perforated, in such a manner as to make particular effects produced by the passage of the movable shutter apparent.
REFERENCES:
patent: 3964802 (1976-06-01), Pitner
patent: 5586592 (1996-12-01), McGregor
Guyard Jean-Pierre
LaBoue Pierre
Fabrique de montres Delanteau SA
Roskoski Bernard
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