Oscillators With Hairsprings, E.g., Balance, Etc. (electrically Driven Balances Subclass 466; Contacts Actuated By A Balance Subclass 546) [g04b 17/06] Patents (Class 968/109)

Cross-Reference Art Collections

Balance construction (balances with frequency adjustment screw subclass 116; balances with temperature compensation subclass 127; balancing devices subclass 132) [g04b 17/06b] (Class 968/110)
Manufacture of the spiral spring (locking of the spiral spring by the regulating lever subclass 121; spiral spring with temperature compensation subclass 129; fixation of the spiral spring on the collet subclass 135; mainspring subclass 10) [g04b 17/06c] (Class 968/111)
  • 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