METHOD FOR TESTING AND MANUFACTURING SPIRAL SPRINGS FOR A TIMEPIECE
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United States of America Patent
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Issued Date -
Feb 29, 2024
app pub date -
Jan 14, 2022
filing date -
Jan 18, 2021
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Abstract
A method for inspecting a spiral or a spiral blank arranged to form a spiral, the spiral having to exhibit at least one predetermined resonant frequency, the inspecting method including the following steps:
- a. applying to the spiral or to the spiral blank a time-varying vibrational excitation to cover a predetermined frequency range,b. identifying at least one characteristic of a resonant frequency, such as a resonance peak, of the spiral or of the spiral blank during the vibrational excitation over the predetermined frequency range,c. submitting to a predicting machine the resonant frequency characteristic identified in the step b. to determine a stiffness of the spiral or of the spiral blank and/or determine whether or not a dimensional correction of the spiral or of the spiral blank is necessary to obtain the predetermined resonant frequency.
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