Constant-force device
AssigneeRichemont International SA
InventorJean-François Mojon
Life of this patent
Estimating the term…
Abstract
A constant-force device for precise regulation of mechanical watch movements by means of a uniform transmission of force from the escape wheel to the regulating organ of the watch, this device being adapted to be integrated into a Tourbillon mechanism.
Claims11
Constant-force device comprising a stop wheel (12) attached to a stop wheel pinion (12a), an escape wheel (6) attached to an escape wheel shaft (9), a tension ring (7) attached to a tension ring pinion (8), and a cam (5) attached to the escape wheel shaft (9) where the movement of the escape wheel (6) is blocked or released by two anchor pallets of a first anchor (4) and where the movement of the stop wheel (12) is blocked or released by two anchor pallets (11a, 11b) of a second anchor (11) that is controlled by a fork-shaped part of this second anchor (11) engaged with the cam (5), characterized in that it comprises a force balance mechanism securing transmission of a constant torque to the regulating organ of a watch by compensating the loss of tension of a spring (10) that provides the driving energy.
Constant-force device for a watch, comprising
- an escape wheel attached to an escape wheel shaft;
- a stop wheel attached to a stop wheel pinion, the stop wheel being non-concentric with the escape wheel;
- a tension ring attached to a tension ring pinion;
- a cam attached to the escape wheel shaft;
- two anchor pallets of a first anchor blocking and releasing movement of the escape wheel;
- two anchor pallets of a second anchor blocking and releasing movement of the stop wheel;
- a fork-shaped part of the second anchor being engaged with the cam and controlling the fork-shaped part;
- and
- a force balance mechanism securing transmission of a constant torque to a watch regulating organ by compensating a loss of tension of a spring that provides the driving energy, the escape wheel transmitting the constant torque.
Constant-force device for a watch with a watch regulating organ, comprising:
- a tensioned spring providing driving energy to a watch regulating organ;
- a stop wheel attached to a stop wheel pinion;
- an escape wheel attached to an escape wheel shaft;
- a tension ring attached to a tension ring pinion;
- a cam attached to the escape wheel shaft;
- two first anchor pallets, of a first anchor, blocking and releasing movement of the stop wheel;
- a fork-shaped part engaging with the cam to control the second anchor;
- and
- a force balance mechanism compensating a loss of tension of the spring to secure transmission of a constant torque to the watch regulating organ.
Dependencies are inferred from the claim text.