Horological timepiece, in particular wristwatch

G - Physics – 04 – B

Patent

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Details

G04B 19/24 (2006.01)

Patent

CA 2230779

The invention relates to a timepiece, particularly a wristwatch, comprising a retrograde date display presenting a graduation from 1 to 31 (2) on the dial (1)cooperating with a hand (3) driven by the mechanism which comprises a sleeve (4) comprising this hand and fast with a pinion (5) meshing with two racks (9) pivoted on a plate (6) of the movement acting in opposite direction on the pinion (5), one of said rack being submitted to the action of a return spring, whereas the free end of the other rack is maintained, by the force of said return spring, permanently against a snail cam carried by a date crown (11) pivoted on said plate (6) and driven in a known manner of one step each day by the watch movement.

L'invention traite d'un appareil d'horlogerie, en particulier d'une montre-bracelet, dont le cadran est doté d'un affichage de date rétrograde comportant des graduations de 1 à 31 (2) qui fonctionne en association avec une aiguille (3) entraînée par un mécanisme constitué d'un axe creux (4) auquel est fixée cette aiguille et qui est lui-même fixé à un pignon (5) engrené avec deux râteaux (9) qui pivotent sur une plaque (6) dont le mouvement agit en sens opposé au pignon (5), un des dits râteaux étant soumis à l'action d'un ressort de rappel, alors que l'extrémité libre de l'autre râteau est maintenue en permanence, par la force dudit ressort de rappel, sur une came-colimaçon entraînée par une couronne de date (11) qui pivote sur ladite plaque (6) et qui est entraînée de manière connue, d'un pas par jour, par le mouvement de la montre.

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