Patent ID: 9651920
Date: 2017-05-16
CPC Classifications: G04B,G04C

Claim:
1. A timepiece resonator comprising: a mobile component ring-shaped about an axis and capable of oscillation; and a drive member subjected to a torque inside a timepiece movement; wherein the resonator is a substantially annular magnetic or electrostatic resonator; wherein the mobile component is periodically excited under action induced by movement of the drive member, the drive member is arranged to exert a contactless effort on the mobile component, the mobile component being flexible and deformable in a plane perpendicular to the axis and in which the mobile component oscillates; the mobile component comprising a first area magnetically or electrically charged at a first pitch angle, and the drive member comprising a second area magnetically or electrically charged at a second pitch angle different from the first pitch angle, arranged to cooperate in attraction or in repulsion with the first area, such that the mobile component and the drive member together form a speed reducing or increasing mechanism; and wherein speed of the drive member defines a speed of propagation of a wave of deformation in a material of the mobile component all round the mobile component, or defines a standing wave of oscillation of the mobile component between repetitive shapes corresponding to standing modes.