Escapement device for timepiece
AssigneeDetra SA
InventorsXuan-Mai Tu, Michel Schwab
Life of this patent
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Abstract
The invention concerns an escapement device comprising a power source capable of delivering a variable torque based on the angle of rotation of a pinion fixed to said power source, said variable torque having at least a stable position and an unstable position. The device further comprises locking means capable of locking power transmission to an oscillator in a stable point of equilibrium and unlocking means capable of unlocking power transmission to said oscillator between a stable point of equilibrium and an unstable point of equilibrium.
Claims19
An escapement device notably for a timepiece, comprising a mobile organ of power transmission toward an oscillator able to receive said power and of transmitting an oscillation frequency,
- a first means able to produce at least a first portion of the power intended to supply the oscillator,
- said first means having a configuration such that it will supply a mechanical torque that is essentially variable as a function of the angle of angular displacement of said mobile organ, said mechanical torque having at least one stable position and at least one unstable position during one period of angular displacement of said mobile organ.
Dependencies are inferred from the claim text.