Method for adapting a timepiece movement provided to operate in ambient atmospheric pressure so as to operate in a low-pressure atmosphere
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United States of America Patent
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Jan 3, 2017
Grant Date -
Nov 20, 2014
app pub date -
Dec 4, 2012
filing date -
Dec 9, 2011
priority date (Note) -
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Abstract
A method for adapting a timepiece movement includes measuring a loss of energy for each free oscillation of the balance at atmospheric pressure; measuring the loss of energy for each free oscillation at a given low pressure corresponding to a working pressure intended for a modified movement; using i) the measured loss of energy at atmospheric pressure and ii) the measured loss of energy at the given low pressure, determining a percentage of energy gain of the balance between respective i) measurements of the measured loss of energy at atmospheric pressure and ii) measurements of the measured loss of energy at the given low pressure; and reducing a torque delivered to the escapement by a value corresponding to the determined percentage of energy gain.
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