Timepiece assembly comprising a mechanical oscillator associated with an electronic device for controlling its mean frequency
US11327440B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2019 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Dec 24, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04C10/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A timepiece is provided with a mechanical movement which includes a mechanical resonator, a sensor detecting oscillations of the mechanical resonator, and a braking device arranged to generate braking pulses in response to a control signal provided by a control circuit associated with an auxiliary oscillator. The control circuit is arranged to be capable of detecting a negative or positive temporal drift in the oscillation of the mechanical resonator and to generate, in a correction period, in association with the braking device, when the temporal drift corresponds to at least a certain loss, a series of braking pulses which are applied to the mechanical resonator at a frequency FSUP in a given range of values which is preferably higher than a frequency FZ (N)=2·F0c/N, F0c being a set point frequency for the mechanical resonator and N a positive integer number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.