An element for radial guiding of a pivot of a rod of a rotating wheel, for example a rod of a balance, for a bearing of an horological movement, in particular shock-absorbing, the guide element including a body configured to cooperate with a bearing unit in such a way as to be maintained in the unit, the body defining a space for radial retention of the pivot, to maintain the rod radially while allowing it to rotate. The radial guide element includes at least three localized radial-bearing parts distributed angularly, the three parts defining the radial retention space, each part having a face for contact with the pivot, each face locally having a cylindrical shape convex towards the inside of the radial retention space, the bearing parts having an elongated body.

A rivet (1), in particular a horological rivet, comprising: a longitudinal axis (10); a first part (20), in particular a head (50); a second part (30), in particular a body (60),
the first part comprising a first handling element (1a) that is able to mechanically stress the first part, and the second part comprising a second handling element (1b) that is able to mechanically stress the second part, the first and second handling elements being such that they make it possible to apply mechanical actions to the first and the second part, respectively, that cause the first and second parts of the rivet to break, notably to shear.

A rivet (1), in particular a horological rivet, comprising: a longitudinal axis (10); a first part (20), in particular a head (50); a second part (30), in particular a body (60),
the first part comprising a first handling element (1a) that is able to mechanically stress the first part, and the second part comprising a second handling element (1b) that is able to mechanically stress the second part, the first and second handling elements being such that they make it possible to apply mechanical actions to the first and the second part, respectively, that cause the first and second parts of the rivet to break, notably to shear.

An assembly including horological movement support, a motor plate of a timepiece and a fastener fastening the support to the plate. The fastener includes a self-tapping screw having a body that passes through a hole in the support. A recess in the plate or support is tapped when the screw is screwed into the recess. The shape of the recess has a variable width, which is wider at the opening extending to a smaller diameter at the bottom of the recess, the shape corresponding to that of the body of the screw.

Timepiece display mobile component (1) comprising at least one resilient strip (4) returned to a display axis (DA), to cooperate in a friction drive with an arbor (2) of a drive mobile component (3) of a movement (100) or a mechanism, about the axis (DA), this mobile component (1) includes a flange (5) comprising, facing each resilient strip (4), an aperture (6) for the insertion and guidance of a manual or robotic tool to allow the tool to move the resilient strip (4) away from its rest position, and to insert the mobile component (1) on an arbor (2) when the resilient strip (4) is sufficiently far away to allow this mobile component to pass, and to ensure a constant friction value of all the resilient strips (4) on the arbor (2) when they are in frictional cooperation with the arbor (2) and when the tool is no longer in contact with the resilient strips (4).

Timepiece display mobile component (1) comprising at least one resilient strip (4) returned to a display axis (DA), to cooperate in a friction drive with an arbor (2) of a drive mobile component (3) of a movement (100) or a mechanism, about the axis (DA), this mobile component (1) includes a flange (5) comprising, facing each resilient strip (4), an aperture (6) for the insertion and guidance of a manual or robotic tool to allow the tool to move the resilient strip (4) away from its rest position, and to insert the mobile component (1) on an arbor (2) when the resilient strip (4) is sufficiently far away to allow this mobile component to pass, and to ensure a constant friction value of all the resilient strips (4) on the arbor (2) when they are in frictional cooperation with the arbor (2) and when the tool is no longer in contact with the resilient strips (4).

Provided is a movement enabling easily providing an indicator position detection mechanism in a movement enabling changing the locations of an indicator by changing the configuration of a wheel train. The movement includes an indicator wheel to which an indicator is attached; a motor that drives the indicator wheel; a detection wheel train used to detect a position of the indicator; and a main plate to which the indicator wheel, the motor, and the detection wheel train are disposed. The main plate is configured to enable selectively disposing the indicator wheel to a first position or a second position that is different from the first position. The detection wheel train is disposed to the same position whether the indicator wheel is disposed to the first position or the second position.

Provided is a movement enabling easily providing an indicator position detection mechanism in a movement enabling changing the locations of an indicator by changing the configuration of a wheel train. The movement includes an indicator wheel to which an indicator is attached; a motor that drives the indicator wheel; a detection wheel train used to detect a position of the indicator; and a main plate to which the indicator wheel, the motor, and the detection wheel train are disposed. The main plate is configured to enable selectively disposing the indicator wheel to a first position or a second position that is different from the first position. The detection wheel train is disposed to the same position whether the indicator wheel is disposed to the first position or the second position.

An assembly of timepiece parts assembled together with an adhesive at a temperature T.sub.A and to be repositioned when the adhesive is at a temperature T.sub.C. The adhesive includes a formulation, which at T.sub.C includes a mixture of polymer chains with pendant diene units X and coupling molecules including two dienophile end groups Y, wherein the X units and the Y groups are arranged to react with one another and to bond together with the Diels-Alder reaction at a temperature T.sub.DA and to regenerate with the retro-Diels-Alder reaction at a temperature T.sub.RDA, at T.sub.A forms a three-dimensional network, in which the polymer chains are linked to one another by the coupling molecules with the Diels-Alder reaction, where T.sub.A<T.sub.RDAT.sub.C, where temperature T.sub.DA ranges between 0 C. and 100 C. and temperature T.sub.RDA ranges between 50 C. and 200 C., and T.sub.DA is strictly lower than T.sub.RDA. A process for assembling and repositioning two timepiece parts with a repositionable hot melt adhesive to enable the timepiece parts to be repositioned when the adhesive is heated.

An assembly of timepiece parts assembled together with an adhesive at a temperature T.sub.A and to be repositioned when the adhesive is at a temperature T.sub.C. The adhesive includes a formulation, which at T.sub.C includes a mixture of polymer chains with pendant diene units X and coupling molecules including two dienophile end groups Y, wherein the X units and the Y groups are arranged to react with one another and to bond together with the Diels-Alder reaction at a temperature T.sub.DA and to regenerate with the retro-Diels-Alder reaction at a temperature T.sub.RDA, at T.sub.A forms a three-dimensional network, in which the polymer chains are linked to one another by the coupling molecules with the Diels-Alder reaction, where T.sub.A<T.sub.RDAT.sub.C, where temperature T.sub.DA ranges between 0 C. and 100 C. and temperature T.sub.RDA ranges between 50 C. and 200 C., and T.sub.DA is strictly lower than T.sub.RDA. A process for assembling and repositioning two timepiece parts with a repositionable hot melt adhesive to enable the timepiece parts to be repositioned when the adhesive is heated.