Movement for mechanical timepiece
AssigneeCitizen Watch Co., Ltd.
InventorTadahiro Fukuda
Life of this patent
Estimating the term…
Abstract
According to a movement of the present disclosure, the prevention of the transmission of torque to a governor when excessive torque is generated and the prevention of the wasteful consumption of energy when the excessive torque is not generated are achieved. The movement includes a main spring which generates torque, a balance wheel, a gear train mechanism for transmitting the torque generated by the main spring to the balance wheel, and a spring seat for moving a second wheel, for example, of the gear train mechanism in a direction to reduce the transmission efficiency of the torque between the wheels of the gear train mechanism when the torque generated by the main spring is higher than a predetermined torque (Tmax).
Claims6
A mechanical timepiece movement comprising:
- a power source that generates torque;
- a governor;
- a gear train mechanism that transmits the torque generated by the power source to the governor, the gear train mechanism including a plurality of gears engaging with each other;
- and
- a moving mechanism that moves at least one of the gears of the gear train mechanism in a direction to reduce the transmission efficiency of the torque between the gears of the gear train mechanism when the torque generated by the power source is higher than a predetermined torque;
- wherein the moving mechanism moves the gear moved by the moving mechanism in a direction away from other gears that engage with the gear moved by the moving mechanism;
- and
- wherein the moving mechanism moves two end stones in the same direction that support a pivot of the gear moved by the moving mechanism on upper and lower sides of the pivot, respectively.
(canceled)
Dependencies are inferred from the claim text.