Patent · US Active

Tuning fork mechanical oscillator for clock movement

US10459405B2 · kind B2 · utility

0Cited by
4References
16Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMay 1, 2015
Grant dateOct 29, 2019
Priority date—
Expiry dateMay 1, 2035

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG04B17/227
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

The present invention relates to a wristwatch comprising a mechanical clock movement with a tuning fork resonator. The oscillator preferably comprises a material A with a low internal friction. In the oscillator of the invention, the unwanted symmetrical oscillations are avoided, for example, by the choice of the materials from which the tuning fork is manufactured. According to preferred embodiments, the rod and/or fastening of the oscillator comprises a material having greater internal friction than that of said material A, such that the quality factor Q2 of the symmetrical oscillations is reduced, in contrast to the quality factor Q1 of the anti symmetrical oscillation mode.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.