An elastic securing organ for fastening a horological component on a support element including an outer peripheral wall capable of being connected to said horological component and an inner peripheral wall defining a triangular-shaped opening wherein the support element is capable of being inserted, the elastic securing organ includes elastic arms each forming one side of the triangular opening and helping ensure the gripping of the support element in the opening, each arm including: at least one cut-out defined completely or partially along the body of said arm, an elastic contact zone with the support element, and elastic peripheral zones which extend between this contact zone and the ends of this elastic arm, the contact zone having a greater quantity of material than the quantity of material forming each of the peripheral zones thereof.

The spiral includes turns of rectangular section, whose pitch p and/or thickness e can vary from the inside curve towards the outside curve, or whose winding can deviate from the line of a perfect spiral. The inside curve can also be extended by a self-locking washer for fixing the spiral on the balance arbour with no play. The spiral is manufactured by photolithography and galvanic growth, or by micro-machining an amorphous or crystalline material, such as a silicon wafer.

The spiral includes turns of rectangular section, whose pitch p and/or thickness e can vary from the inside curve towards the outside curve, or whose winding can deviate from the line of a perfect spiral. The inside curve can also be extended by a self-locking washer for fixing the spiral on the balance arbour with no play. The spiral is manufactured by photolithography and galvanic growth, or by micro-machining an amorphous or crystalline material, such as a silicon wafer.

An assembly (300) includes (i) a hairspring (2) made of a paramagnetic alloy including at least one of the following elements: Nb, V, Ta, Ti, Zr and Hf, notably an alloy including the elements Nb and Zr with between 5% and 25% by mass of Zr and an interstitial doping agent including oxygen, and least one fastening part (1; 1), notably two parts (1; 1), in particular a stud (1) or a collet (1), for an end (2a; 2b) of the hairspring (2), the at least one part (1; 1) having a first portion (10; 10) that is designed to come into contact with the hairspring (2) and that is made of titanium or titanium alloy or of tantalum or tantalum alloy, notably grade 2 titanium or grade 5 titanium.

An assembly (300) includes (i) a hairspring (2) made of a paramagnetic alloy including at least one of the following elements: Nb, V, Ta, Ti, Zr and Hf, notably an alloy including the elements Nb and Zr with between 5% and 25% by mass of Zr and an interstitial doping agent including oxygen, and least one fastening part (1; 1), notably two parts (1; 1), in particular a stud (1) or a collet (1), for an end (2a; 2b) of the hairspring (2), the at least one part (1; 1) having a first portion (10; 10) that is designed to come into contact with the hairspring (2) and that is made of titanium or titanium alloy or of tantalum or tantalum alloy, notably grade 2 titanium or grade 5 titanium.

An elastic retaining member is for attaching a horological component to a support element. The retaining includes an opening into which the support element is capable of being inserted. The retaining member also includes rigid arms and elastic arms defined between the connection zones of the retaining member. The arms contribute to procuring elastic gripping of the support element in the opening, each rigid arm being provided with a single convex contact zone of the retaining member capable of engaging with a corresponding convex contact portion of the support element.

Some embodiments are directed to adjusting the oscillation frequency of an oscillating system for a watch movement, including: selecting a hairspring, selecting a balance belonging to a predetermined class, without a balance rim, at least two weight elements for balancing in a predetermined batch, pairing the hairspring with the balance and the at least two weight elements, measuring an oscillation frequency of the oscillating system including the hairspring, the balance and the at least two weight elements, and selecting at least one of a balance of another class or of the at least two weight elements of another batch if the measured oscillation frequency does not correspond to a desired oscillation frequency.

The invention relates to a timepiece component with a part comprising elastic attachment means and securing means arranged to be welded enabling the attachment of the elastic means to be decoupled from the securing means to ensure the welding of the timepiece component.

The invention relates to a timepiece component with a part comprising elastic attachment means and securing means arranged to be welded enabling the attachment of the elastic means to be decoupled from the securing means to ensure the welding of the timepiece component.

A balance wheel-hairspring oscillator (10) has a balance wheel shaft (18) intended to be pivotably mounted on a frame of a timepiece. A balance wheel (12) is secured to the balance wheel shaft (18). A hairspring (14) has an inner end (14a) secured to the balance wheel shaft and an outer end (14b) intended to be connected to a connecting member (16) to the frame. A transmission member (20, 22) is arranged to interact with an escapement. The balance wheel (12) and the hairspring (16) are arranged on either side of the transmission member.