Patent ID: 8047705
Filing Date: 2011-11-01
Classification: G04B

Abstract:
1. An anti-shock collet connected to a balance spring of a sprung balance regulating system, wherein the anti-shock collet comprises: a plate including an aperture formed therein for attachment to a balance staff of the sprung balance regulating system of a mechanical timepiece movement, wherein the sprung balance regulating system comprises the balance spring that includes a first coil that has an inner terminal curve, and the collet is made of a brittle and shock-sensitive material at the same time as the balance spring so there is no discontinuity of the material between the plate of the collet and the balance spring at a junction region connecting the plate of the collet and the balance spring as a single piece, wherein the collet has an asymmetrical contour that follows from the junction region, at which the collet joins the balance spring, to at least from place to place along a contour of the inner terminal curve of the first coil of the balance spring, and at a substantially constant distance d from the contour of the inner terminal curve of the first coil of the balance spring.