Magnetic and/or electrostatic resonator
US9651920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2014 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Dec 9, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B15/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A timepiece resonator including a mobile component ring-shaped about an axis and capable of oscillation about an axis, and a drive member subjected to a torque inside a timepiece movement. The resonator is an annular magnetic or electrostatic resonator whose mobile component is periodically excited under action induced by motion of the drive member. The drive member can exert a contactless effort on the mobile component. The mobile component includes a first quantity of first pole pieces magnetically or electrically charged at a first pitch angle, and the drive member includes a second quantity of second pole pieces 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 pole pieces, such that the mobile component and the drive member together form a speed reducing or increasing mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.