MAINSPRING FOR A TIMEPIECE
    3.
    发明申请
    MAINSPRING FOR A TIMEPIECE 审中-公开
    主要用于时间表

    公开(公告)号:US20140003203A1

    公开(公告)日:2014-01-02

    申请号:US13924855

    申请日:2013-06-24

    申请人: Nivarox-FAR S.A.

    IPC分类号: G04B1/14

    CPC分类号: G04B1/145 Y10T29/49609

    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.

    摘要翻译: 本发明涉及一种包括金属条(3)的发条(1)。 根据本发明,金属是奥氏体钢(5),以便限制对磁场的敏感性,并且至少钢带(3)的外表面与其余部分相比硬化到预定深度(7) 为了在主要应力区域硬化条带(3),同时保持较低的弹性模量。