MAINSPRING
Number of patents in Portfolio can not be more than 2000
United States of America
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app pub date -
May 2, 2019
filing date -
May 2, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A timepiece mainspring including, in the manufactured state, an eye and a portion formed of coils with an outer coil of radius R, the eye and the portion formed of coils being connected by a neck portion having substantially zero curvature, the timepiece mainspring wherein the neck portion has a length LC comprised between 1.5 and 10 times, and preferably between 2 and 8 times, the radius R. The mainspring having this specific geometry reduces the risk of premature breakage during use, typically for an application with a k factor lower than 10.
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