Method for adjusting the chronometry of a timepiece movement intended to operate in a low-pressure atmosphere
AssigneeCartier International AG
InventorsKewin Bas, Cyrille Chatel
Life of this patent
Estimating the term…
Abstract
A method for regulating time-keeping of a mechanical timepiece movement intended to operate in a low-pressure atmosphere, includes the successive steps of: placing the movement in a low-pressure atmosphere pre-established for normal operation of the movement; measuring the gain or recoil (typically a gain +ΔP) of the time-keeping precision of the movement at this low pressure; returning the movement to ambient atmospheric pressure; at the ambient atmospheric pressure, regulating the movement to compensate for the previously measured gain or recoil; and returning the movement to the low-pressure atmosphere pre-established for normal operation of the movement.
Claims12
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.
Dependencies are inferred from the claim text.