Timepiece balance spring

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United States of America Patent

PATENT NO 9239569
APP PUB NO 20150234355A1
SERIAL NO

14612598

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Balance spring including, tangent to each other:

    a first inner coil at a first angle at the center and of decreasing section in a first ratio;a second coil at a second angle at the center and of constant section;a third coil at a third angle at the center and of increasing section in a third ratio;a fourth coil at a fourth angle at the center and of constant section;a fifth coil at a fifth angle at the center and of increasing section in a fifth ratio;a sixth outer coil at a sixth angle at the center and of increasing section in a sixth ratio.

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Patent Owner(s)

Patent OwnerAddress
ETA SA MANUFACTURE HORLOGERE SUISSE2540 GRENCHEN

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cabezas, Jurin Andres Yverdon, CH 23 119
Trumpy, Kaspar Soleure, CH 7 98

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