Wherein Movement Is Regulated By A Mechanical Oscillator Other Than A Pendulum Or Balance, E.g., By A Tuning Fork, E.g., Electrostatically, Etc. [g04c 3/08] Patents (Class 968/480)

Cross-Reference Art Collections

Driven by electromagnetic means [g04c 3/10] (Class 968/481)
Driven by piezoelectric means; driven by magnetostrictive means [g04c 3/12] (Class 968/488)
  • Coupled resonator for regulating system
    Patent number: 7889028
    Abstract: The coupled resonator comprises a first low frequency resonator, such as a balance spring (1) and a second higher frequency resonator, such as a tuning fork (2), the two resonators (1 and 2) including permanent mechanical coupling means. Application to the regulating system of a timepiece.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: February 15, 2011
    Assignee: The Swatch Group Research and Development Ltd
    Inventors: Thierry Hessler, Kaspar Trümpy