HAIR SPRING, MOVEMENT, CLOCK, AND METHOD FOR MANUFACTURING HAIR SPRING

PROBLEM TO BE SOLVED: To eliminate a large bent portion in an outer end curve region R of a hair spring 1 used for the balance 19 of a clock 15 and reduce thickness.SOLUTION: The hair spring 1 has a spiral shape formed by winding a linear spring material 2. A spiral is approximately circular in a pl...

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Hauptverfasser:	KAMIYAMA SHOTARO, AMANO YUKI, SHIGESHIRO KOICHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	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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