COLUMN WHEEL FOR CHRONOGRAPH, CHRONOGRAPH AND CLOCK WITH CHRONOGRAPH HAVING SAID WHEEL Russian patent published in 2014 - IPC G04B13/02 

FIELD: physics; clocks.

SUBSTANCE: column wheel (1) for a chronograph comprises: a ratchet (2) equipped with a plurality of teeth (3), the shape of which determines the direction of rotation of the column wheel; a top part of the structure which is coaxial with the wheel and has axial symmetry of the order n>=3, wherein the peripheral part of the top part of the structure forms n columns (10), parallel to the axis of the wheel and distributed substantially along the circumference of the ratchet (2), wherein each column has an outer part whose cross-section is substantially in the form of a truncated triangle, having a base substantially parallel to the circumference of the wheel, a front side (12), called the front edge, and a rear side (13), called the rear edge and directed from the base into the wheel. The column wheel is characterised by that said cross-section is asymmetric, wherein the first angle α between the front edge (12) and the base (14) is less than the second angle β between the base and the rear edge (13).

EFFECT: improved design.

9 cl, 12 dwg