Method of adjusting the oscillation frequency of a timepiece sub-assembly
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United States of America Patent
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Jan 12, 2016
Grant Date -
Nov 21, 2013
app pub date -
Nov 17, 2011
filing date -
Nov 18, 2010
priority date (Note) -
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Abstract
A method of adjusting oscillation frequency of a timepiece regulating assembly with no index assembly, to a predetermined oscillation frequency, including: randomly taking a particular balance spring assembly from a production of toleranced products; measuring return torque of the balance spring assembly; randomly taking a balance from a production of toleranced products; calculating theoretical inertia of the particular balance required to achieve the predetermined oscillation frequency, according to the measured return torque of the balance spring; measuring real inertia of the particular balance; and by direct action on the particular balance, correcting the inertia of the particular balance to the calculated theoretical inertia value to obtain the predetermined oscillation frequency for the regulating assembly formed by the particular balance, and by the particular balance spring assembly.
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