Patent ID: 9389588
Filing Date: 2016-07-12
CPC Classification: G04B

Claim Text:
1. A method for regulating time-keeping of a mechanical timepiece movement intended to operate in a low-pressure atmosphere, comprising the successive steps of: 1. placing the movement in the low-pressure atmosphere pre-established for normal operation of the movement, 2. measuring a gain or recoil (ΔP) of time-keeping precision of the movement during low-pressure operation in the low-pressure atmosphere, 3. returning the movement to ambient atmospheric pressure, 4. with the movement at the ambient atmospheric pressure, regulating the movement to compensate for the previously measured gain or recoil in during the low-pressure operation by performing a gain or a recoil (−ΔP), and 5. returning the movement to low-pressure atmosphere pre-established for normal operation of the movement, wherein the regulating of the movement takes place only in the ambient atmospheric pressure, and no regulating of the movement takes place during the low-pressure operation in the low-pressure atmosphere.