Patent ID: 9201399
Filing Date: 2015-12-01
Classification: G04B

Abstract:
1. A watch regulating member, comprising: at least one balance wheel oscillating about an axis of oscillation and subjected to a return torque exerted by torsion return mechanism, wherein at least one balance includes an attachment structure causing said balance to oscillate integrally with at least one torsion wire which forms said torsion return mechanism specific to said at least one balance, and wherein a largest dimension of the cross-section of a useful portion of said torsion wire which is subjected to torsion is less than 100 micrometers, a smallest dimension of the cross-section of said useful portion is less than 50 micrometers, a total length of said torsion wire is less than 6 millimeters, and further comprising a mechanism to tension said at least one torsion wire, and wherein said balance comprises, on both sides of said attachment structure along said axis of oscillation, first and second structures to limit radial clearance between said torsion wire and said balance.