METHOD OF HARMONIC TUNING OF AT LEAST ONE GONG OF A WATCH STRIKING MECHANISM
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United States of America Patent
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Issued Date -
Jun 16, 2022
app pub date -
Aug 12, 2021
filing date -
Aug 12, 2021
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Abstract
A method for tuning a gong of a striking watch. The gong is fastened at one end to a gong holder, which can be mounted in a watch case. The gong is struck by a hammer to be vibrated on a support of the measuring instrument to determine by a fast Fourier transform frequency peaks in a band of audible frequencies. A comparison in a first natural mode of a vibration frequency in the plane XY with a vibration frequency outside the plane Z is performed and a ratio calculation r=|f1p−f1h|/f1p, where f1p is the vibration frequency in the plane XY, and f1h is the vibration frequency outside the plane Z. If the ratio r is less than or equal to a desired value of 0.006, the gong is tuned. If it is greater, the method is repeated until the ratio value is achieved.
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