Abstract: A balance spring system of a horology movement, comprising: a balance spring (1); a movement blank; a first element (1c) for indexing the position of an outer end (10) of the balance spring relative to the blank; and a unit (OL) for connection of the outer end (10) of the balance spring to the movement blank, the first indexing element (1c) being designed such as to be displaceable relative to the connection unit (OL).

Abstract: An anti-trip mechanism includes a flange with a radial travel limiting channel and a balance spring with a strip wound into a plurality of coils. The balance spring includes an inner coil fixed, at a first end, to a collet coaxial to the balance spring relative to a pivot axis, and an outer coil fixed, at a second, opposite end, to a hooking element. A coil of the balance spring includes a finger that includes a feeler spindle stud that is mounted integrally with the coil. The feeler spindle stud is moveable without any contact, during the normal extension and contraction of said balance spring, in the radial travel limiting channel of the flange. The radial travel limiting channel limits travel of the finger relative to the pivot axis when an angle of pivoting imparted to the collet is greater than a determined nominal value.

Abstract: A balance spring including a first hairspring, the inner coil of which includes a collet arranged to be mounted on a staff, and a second hairspring connected to the outer coil of the first hairspring by a raised terminal curve device. The inner coil of the second hairspring includes a device for shifting the pinning point including a free end arranged to be pinned up to a stud in the plane of the second hairspring.

Abstract: A timepiece escape mechanism sub-assembly includes at least one bar and at least one balance spring. The outer end of the balance spring is secured to a balance spring stud. The balance spring and the balance spring stud associated therewith form a single-piece assembly with the bar.

Abstract: A balance spring with two pairs each formed of adjacent coils respectively including a stopping device and a complementary stopping device defining together, for each pair, a respective, relative, maximum angular travel of the coils during the local coupling thereof. The stopping device and the complementary stopping device define different maximum angular travel values, to gradually limit the amplitude of pivoting between the ends of the balance spring during accelerations greater than desired values, one of the pairs cooperating in abutment before the other, to gradually modify the resulting rigidity of the balance spring by the successive deactivation or reactivation of the coils thereof.

Abstract: Balance spring boot (1) to be driven onto an index (10) for adjusting a balance spring (20) pivoting relative to an axis (D) and including two pins (2, 3), parallel to each other in one direction (D1) and arranged for limiting the radial beat of a balance spring (20) inserted between said pins, and including a means of resting on said index (10) arranged, when said balance spring boot (1) is assembled on said index (10), for adjusting said direction (D1) parallel to said pivot axis (D). Said spring boot (1) includes in a parallel direction to said direction (D1) a sight hole (4) clear so as to allow visualisation by an operator or instrument of said pins (2, 3) and the portion of a balance spring (20) inserted between them at a distance from and/or in contact with one and/or the other of said pins (2, 3).

Abstract: Balance spring (1) comprising two pairs (50) each formed of adjacent coils (51; 52) respectively comprising stopping means (11) and quincuncial staggered complementary stopping means (12) defining together, for each pair (50), a respective, relative, maximum angular travel (CA) of these coils during the local coupling thereof during accelerations of the balance spring (1) which are greater than desired values, in order to limit the number of active coils. The stopping means (11) and complementary stopping means (12) of these pairs (50) define different maximum angular travel values (CA), to gradually limit the amplitude of pivoting between the ends (3; 4) of the balance spring (1) during accelerations greater than these desired values, one of said pairs (50) cooperating in abutment before the other, to gradually modify the resulting rigidity of the balance spring (1) by the successive deactivation or reactivation of the coils (5) thereof.

Abstract: A regulator comprising two limiting members in the form of a blanked and bent tongue of a lug and of a detachable part serving as a pin or key, respectively. Part of the side surface of the tongue bent at a 90.degree. angle projects to form a banking. The detachable limiting member, which can be rotatingly adjusted about its axis, is fitted in the entrance opening of a cut-out portion and includes a projecting edge constituting the other banking. The two bankings are visible from above between the side surface of the bent tongue and the entrance opening of the cut-out portion so that the regulation of the beat of the balance-spring can be checked under a microscope.