SPIRAL SPRING FOR A SPRUNG BALANCE SPIRAL RESONATOR AND METHOD FOR MANUFACTURING THE SAME

The spiral includes turns of rectangular section, whose pitch p and/or thickness e can vary from the inside curve towards the outside curve, or whose winding can deviate from the line of a perfect spiral. The inside curve can also be extended by a self-locking washer for fixing the spiral on the bal...

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Bibliographische Detailangaben
Hauptverfasser:	TRÜMPY KASPAR, CONUS THIERRY
Format:	Patent
Sprache:	eng
Schlagworte:	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 PHYSICS TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
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Beschreibung
Zusammenfassung:	The spiral includes turns of rectangular section, whose pitch p and/or thickness e can vary from the inside curve towards the outside curve, or whose winding can deviate from the line of a perfect spiral. The inside curve can also be extended by a self-locking washer for fixing the spiral on the balance arbour with no play. The spiral is manufactured by photolithography and galvanic growth, or by micro-machining an amorphous or crystalline material, such as a silicon wafer.