Abstract: A spiral spring for a timepiece resonator mechanism, the spiral spring extending substantially in a plane and including a flexible blade wound on itself in several turns and a setting device for modifying the effective length of the wound blade, the setting device including a clamp movable along at least one ending portion of the spiral spring, the clamp extending substantially in the plane of the spiral spring, the clamp including two bearing faces arranged on either side of the wound blade in a multiplicity of positions so as to define a variable effective length of the spiral spring, the clamp and the wound blade being linked to each other by a flexible element allowing the clamp and the bearing faces to be displaced along the wound blade.

Abstract: A balance-spring stud for fixing with a spot of glue a free end of a last turn on the outside of a spiral spring for a timepiece movement, this balance-spring stud includes a base within a plane, first and second arms extending from the plane and free at their end opposite the base, the first and second arms being separated from one another by a gap in which the free end of the last turn on the outside of the spiral spring that is trapped in the hardened spot of hardened glue is housed, at least one of the first and second arms being provided with a stop device arranged to prevent the spot of hardened glue in which the free end of the last turn on the outside of the spiral spring is trapped from being released from the gap in which the spot of hardened glue is housed when this spot of hardened glue no longer adheres to the balance-spring stud.

Abstract: The invention relates to a balance-spring stud-holder for a mechanical timepiece movement, which comprises a pair of tabs, namely a front tab and a rear tab, jointly defining a notch, the tabs being arranged in such a way that a balance-spring stud can be held in the notch, wherein the rear tab of the balance-spring stud-holder comprises an extension which defines, beyond the notch, a bend forming a retaining abutment for the balance-spring stud after said balance-spring stud has been extracted from the notch.

Abstract: The present invention concerns an assembly for holding or supporting a timepiece balance spring including a balance spring stud and a stud-holder, wherein said stud-holder includes: a base comprising an upper face and a lower face extending along a longitudinal axis; characterized in that the base includes a lug of non-constant shape protruding from one of the faces, said assembly further comprising a holding plate including a first opening and a second opening separated by a deformable arm, with the stud engaging in the second opening.

Abstract: Timepiece sub-assembly including a balance spring stud arranged to be fastened to a balance cock, and a balance spring comprising an outer coil and an end plate of larger section than that of the outer coil, this stud including a housing arranged, in a first free state of the sub-assembly, to loosely contain the end plate with tangential mobility with respect to the outer coil, and, in a second immobilized state of the sub-assembly, to immobilize the end plate to which the housing is joined by a layer of adhesive covering a change-of-section shoulder and which forms a mechanical seal for the balance spring in a longitudinal direction of the housing, and the end plate includes an eye communicating with the layer in the second immobilized state.

Abstract: An assembly for holding or supporting a timepiece balance spring including a base provided with an upper surface and a lower surface on which a balance spring stud and a stud-holder are arranged. The stud-holder secures the stud to an escapement mechanism.

Abstract: The present invention concerns an assembly for holding or supporting a timepiece balance spring including a balance spring stud and a stud-holder, wherein said stud-holder includes: a base (30, 300) comprising a first stop member (32, 320) extending along a longitudinal axis (L) of said base; means (7) of attaching said stud-holder to a balance-cock (5), characterized in that said stud-holder further includes elastic means (34, 340) provided with a second stop member (36, 360).

Abstract: An assembly to hold a balance spring includes a balance spring stud, and a stud-holder. The stud-holder includes a housing to receive the stud, a mechanism to secure the stud including a screw orthogonal to the stud, and a mechanism to secure the stud-holder to an escapement mechanism. The stud includes a surface to orient a balance spring. The screw partially passes through the stud to hold the stud in an indexed position. The stud includes an internal thread cooperating with the screw and forming the orientation surface. The stud-holder includes a bore for the passage of the screw, a bearing face arranged at the entry of said bore, on the opposite side to the housing, for the abutment of a head of the screw.

Abstract: An assembly for holding a balance spring includes a stud including a surface for orienting a balance spring, and a stud-holder. The stud-holder includes a first housing for receiving the balance spring stud, a mechanism to secure the stud including a screw orthogonal to the stud, and a mechanism to secure the stud-holder to an escapement mechanism. The screw partially passes through the stud to hold the stud in an indexed position. The stud includes a second housing for the contact-free passage of the screw. The stud-holder includes on either side of the first housing an internal thread cooperating with the screw and a third bore for the passage of a head of the screw cooperating in abutment with the orientation surface.

Abstract: An assembly for holding or supporting a timepiece balance spring includes a balance spring stud and a stud-holder. The stud-holder includes a device to secure the stud-holder to an escapement mechanism. The balance spring stud includes a lateral bearing surface defining a direction of holding or supporting the balance spring. The stud-holder is in two parts, and includes a rigid structure carrying the securing device, and a strip spring pressed against this rigid structure and including at least one elastic lip defining, with this structure, a chamber for receiving this stud and cooperating with this lateral bearing surface of this stud to hold this stud in an indexed locking position.

Abstract: The regulating device includes an inertial balance (7) including a balance staff arranged to be pivotally mounted in the timepiece, a balance bridge (9) and a bearing (11) carried by the balance bridge and arranged to hold one end of the balance staff, a balance spring (1) including an inner end integral with the balance and an outer end (1a) integral with a stud (3; 103), and a mechanism for securing the stud (3; 103) including a housing (17) for receiving the stud and which is formed in a stud holder (5) pivoted on the balance bridge (9), the securing mechanism further including an elastic arm (15; 115) arranged to pivot concentrically to the balance staff between a first position where the elastic arm immobilizes the stud (3; 103) and a second position where the elastic arm is disengaged from the stud to allow the stud to be inserted into or removed from the housing.

Abstract: An assembly for holding or supporting a timepiece balance spring includes a balance spring stud and a stud-holder. The stud-holder includes a device to secure the stud-holder to an escapement mechanism. The balance spring stud includes a lateral bearing surface defining a direction of holding or supporting the balance spring. The stud-holder is in two parts, and includes a rigid structure carrying the securing device, and a strip spring pressed against this rigid structure and including at least one elastic lip defining, with this structure, a chamber for receiving this stud and cooperating with this lateral bearing surface of this stud to hold this stud in an indexed locking position.

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: Mechanism for adjusting the active length of a timepiece balance spring whose outer end is fixed to a balance spring stud secured to a bar, this mechanism including two pins for clamping or touching the outer coil of the balance spring during the operation of this balance spring. These two pins are in a single piece with this bar.

Abstract: Hairspring for a balance wheel/hairspring resonator, comprising n blades, where n?2, which are fastened via at least one of their respective homologous ends and wound in spirals with an angular offset capable of neutralizing the lateral forces liable to be exerted on its central arbor when one of the ends of each blade is moved angularly around said central arbor relative to its other end.

Abstract: Assembly for securing the outer end of the balance-spring (1) of a sprung balance device for a timepiece that includes a balance-spring stud holder (2) for housing a balance-spring stud (10), against which the balance-spring (1) can be locked, a screw (11) for locking the stud, for securing the balance-spring (1) by insertion between the stud (10) and a back face (7), the locking screw (11) including a tip (15) in the extension of the threaded body (12) at the opposite end to the screw head, and the stud (10) including a housing (16) in which the tip (15) can be inserted. The corresponding watch and method of securing the outer end of the balance-spring are also provided.

Abstract: Hairspring for a balance wheel/hairspring resonator, comprising n blades, where n?2, which are fastened via at least one of their respective homologous ends and wound in spirals with an angular offset capable of neutralizing the lateral forces liable to be exerted on its central arbor when one of the ends of each blade is moved angularly around said central arbor relative to its other end.

Abstract: A regulatorless oscillating system for a watch includes a spiral balance spring having an inner fastening point attached to a collet which can be connected to a balance staff, an outer fastening point connected to a balance spring stud, and an end region adjacent to the stud. The end region is held so that it can be adjustably positioned in a plane which is perpendicular to the balance staff, thereby decentralizing the balance spring in order to compensate for isochronism errors.

Abstract: The balance-spring (1) includes a plurality of coils (3) of which the end (6, 8) of the outer curve (2) is rigidified by deformation in order to define accurately the setting point (7) of said balance-spring, said deformation being able to be achieved by bending the end (6) of the outer curve (2) through 90° in a plane perpendicular to the height of the balance-spring (1) or by folding down through 180° a portion of the end (8) of the outer curve (2) against the inner or outer face of said end (2).

Abstract: An oscillating system for a mechanical timepiece includes an annular balance wheel arranged in a fixed manner coaxially in relation to a rotatably mounted balance staff. A helical spring encloses the balance staff and has its inner end fastened on the balance staff and its outer end fastened on a fastening device. The fastening device has a helical-spring connector with an inner clamping jaw and an outer clamping jaw, the inner clamping jaw being radially inside of the outer clamping jaw in relation to the axis of rotation of the balance staff. The outer end of the helical spring may be clamped firmly between a clamping surface of the inner clamping jaw and a clamping surface of the outer clamping jaw.

Abstract: A method for manufacturing a balance-spring for a clockwork movement wherein a spring is formed by winding, from a wire or metal strip, said spring including an inner end intended to be fixed to a balance and a outer end zone intended to be fixed to the balance-spring stud and wherein the whole spring is subjected to a first heat treatment subsequent to the winding step of said wire. The method of the invention is characterized in that it further includes an additional step consisting in subjecting at least said outer end zone to a second heat treatment.This method improves in particular the shock resistance of the balance-spring.