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AssigneeNivarox-FAR S.A.
InventorsChristian CHARBON, Thierry Hessler, Jean-Pierre Mignot
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The invention relates to a timepiece movement (1) comprising a sprung (7) balance (5) resonator (3) mounted between a bar (2) and a bottom plate (4) wherein the balance (7) is formed from a ferromagnetic material. According to the invention, the timepiece movement includes a magnetic polarising device (15) for said balance spring for maintaining a predefined state of polarisation in the balance spring (7) and including permanent magnetising means which forms a magnetic field in the plane of the balance spring so as to totally or almost totally magnetically saturate the balance spring (7) in the absence of an external magnetic field. The invention concerns the field of timepieces.
A timepiece movement comprising a sprung balance resonator mounted between a bar and a bottom plate and wherein the balance spring is formed from a ferromagnetic material, wherein it includes a magnetic polarising device for said balance spring for maintaining a predefined state of polarisation in the balance spring and comprising a permanent magnetising means which forms a magnetic field in the plane of the balance spring in order to totally or almost totally magnetically saturate the balance spring in the absence of an external magnetic field.
Dependencies are inferred from the claim text.