Patents Assigned to Manufacture des Montres Rolex S.A.
  • Self-compensating spiral for a spiral balance-wheel in watchwork and process for treating this spiral
    Patent number: 6503341
    Abstract: This self-compensating spiral for a mechanical spiral balance-wheel oscillator in watchwork or other precision instrument, made of a paramagnetic alloy, contains at least one of the elements Nb, V, Ta, Ti, Zr, Hf and is covered with a substantially uniform oxide layer having a thickness greater than or equal to 20 nm, formed by subjecting the said spiral to an anodizing treatment.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: January 7, 2003
    Assignees: Montres Rolex S.A., Manufacture des Montres Rolex S.A.
    Inventors: Jacques Baur, Patrick Sol