发明申请
- 专利标题： MAINSPRING FOR A TIMEPIECE
- 专利标题（中）： 主要用于时间表
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申请号： US13924855申请日： 2013-06-24
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公开(公告)号： US20140003203A1公开(公告)日： 2014-01-02
- 发明人: Christian CHARBON , Maxime Govaerts , Cedric Von Gruenigen
- 申请人： Nivarox-FAR S.A.
- 优先权： EP12174134.2 20120628
- 主分类号： G04B1/14
- IPC分类号： G04B1/14
摘要：
The invention relates to a mainspring (1) including a metal strip (3). According to the invention, the metal is austenitic steel (5) in order to limit sensitivity to magnetic fields and at least the outer surface of the strip (3) is hardened compared to the rest of the strip to a predetermined depth (7) in order to harden the strip (3) in the main areas of stress while maintaining a low modulus of elasticity.
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