METHOD OF HARMONIC TUNING OF AT LEAST ONE GONG OF A WATCH STRIKING MECHANISM

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...

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Bibliographische Detailangaben
Hauptverfasser:	KADMIRI, Younes, KARAPATIS, Polychronis Nakis
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING ORMAINTAINING CLOCKS OR WATCHES HOROLOGY MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL MECHANICALLY-DRIVEN CLOCKS OR WATCHES METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS SOUND-PRODUCING DEVICES TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
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Beschreibung
Zusammenfassung:	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.