Vertical clutch device for a timepiece
AssigneeMontres Breguet S.A.
InventorsPolychronis Nakis KARAPATIS, Marc STRANCZL
Life of this patent
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Abstract
A vertical clutch device for a timepiece includes along a vertical axis a first wheel rotatably mounted about the vertical axis, a clutch disc, a spring, and a second wheel rotatably mounted about the vertical axis. The vertical clutch device is able to assume a clutched position where the second wheel is rotated by the first wheel under the action of the spring exerting a vertical force Fe to press the clutch disc against the first wheel and a disengaged position where the clutch disc is subjected against the action of the spring to a vertical force Fd separating it from the first wheel so that the second wheel is not rotated by the first wheel. The spring of the vertical clutch device is made of a shape memory alloy.
Claims16
1-14. (canceled)
A vertical clutch device for a timepiece, comprising:
- along a vertical axis a first wheel rotatably mounted about said vertical axis, a clutch disc, a spring, and a second wheel rotatably mounted about said vertical axis, said vertical clutch device being configured to assume a clutched position where the second wheel is rotated by the first wheel under the action of the spring exerting a vertical force Fe to press the clutch disc against the first wheel and a disengaged position where the clutch disc is subjected against the action of the spring to a vertical force Fd separating the clutch disc from the first wheel so that the second wheel is not rotated by the first wheel, wherein the spring of said vertical clutch device is made of a shape memory alloy.
A spring made of a shape memory alloy, the spring being utilized in a vertical clutch device of a timepiece for superelasticity properties of the spring at room temperature.
Dependencies are inferred from the claim text.