System for the control of a wheel for driving in rotation a chronograph hand
AssigneeMontres Dodane-Precia-Gete
InventorRaymond Dodane
Life of this patent
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Abstract
A system for the control of a wheel for driving a chronograph hand in rotation comprising a device for locking the hand-wheel, which includes a locking shoe mounted on a support connected to the return-to-zero lever and to the coupling rocker, so that the movement of the hand-wheel away from the rocker and the lever results in a movement of the locking shoe towards the hand-wheel and in their mutual engagement.
Claims6
A system for the control of a wheel for driving in rotation a chronograph hand, comprising a pivotally mounted lever for returning the hand wheel to zero and including a return-to-zero hammer adapted to co-operate with a heart-shaped cam jointly movable in rotation with the hand wheel, a pivotally mounted rocker for coupling an intermediate wheel rotatably mounted thereon with said hand wheel, a rotatable column wheel for controlling said lever and said rocker and a device for locking said hand wheel when said column wheel has rotated over a certain angle, wherein said locking device includes a locking shoe mounted on a support constituted by an arm attached at one end to the coupling rocker and connected at its other end to the return-to-zero lever by a releasing lever, so that the engagement of the locking shoe with the hand wheel results from the simultaneous movement of the rocker and the return-to-zero lever away from the hand wheel when said column wheel has rotated over said certain angle.
Dependencies are inferred from the claim text.