Abstract: Disclosed is an adjustment method for a timepiece oscillator including a balance, a support and a flexure pivot connecting the balance to the support and guiding the balance in rotation as to the support about a virtual axis of rotation, the flexure pivot having, in orthogonal projection in a plane perpendicular to the virtual axis of rotation, an axis of symmetry which is also an axis of symmetry for the points where the flexure pivot joins the balance. In the method, the unbalance of the balance is adjusted so, in orthogonal projection in the plane, the center of mass of the balance is substantially on the axis of symmetry and at a position distinct from that of the virtual axis of rotation and chosen to reduce, and preferably render minimal, the dependency of the oscillation frequency with respect to the orientation of gravity for a predetermined amplitude of oscillation.

Abstract: Disclosed is a unidirectional clutch wheel assembly that includes a first wheel, a second wheel coaxial with the first wheel and including an inner toothing, a rigid drive member rotationally fixed with respect to the first wheel and at least one rigid pawl connected to the rigid drive member by an elastic strip. The rigid pawl is locked against the inner toothing by the rigid drive member to rotationally fix the first and second wheels to each other when the first wheel or the second wheel is rotationally driven in a direction corresponding to coupling. The inner toothing has asymmetrical teeth. The rigid pawl is arranged, in its position locked against the inner toothing, to be in point contact, in top plan view, with two consecutive teeth of the inner toothing and with the rigid drive member.

Abstract: The invention relates to a method implemented by a computer terminal for assisting the setting of a mechanism of a mechanical timepiece (10). The method comprises the following steps: i) capturing an image or a sequence of images of the mechanical timepiece (10) by means of a computer equipment (20) comprising an image acquisition device (22) and a display area (24); determining the setting to be made according to said image or sequence of images, and displaying on the display area (24) of the computer device (20) a sequence of instructions for said setting of the mechanism.

Abstract: A mechanism for displaying the number of the week is fitted to a timepiece movement and includes a starwheel for the weeks including 52 or 53 teeth, and a rocker for the weeks including a flexible finger cooperating with the toothed arrangement of the weeks starwheel upon actuation of the rocker by a driving mobile. The driving mobile is driven by one step per day by the movement and to actuate the weeks rocker once every seven days upon passing from the last day of the week to the first. The driving mobile is a driving starwheel including seven teeth, six being silent teeth which are arranged not to cooperate with the weeks rocker and one tooth is a driving tooth arranged to actuate the rocker once per week upon passing from the last day of the week to the first day of the week.

Abstract: Disclosed is a display mechanism for a timepiece, including a frame, an aperture which is fixed relative to the frame and a first and a second display disc each bearing indications, characterized in that it makes it possible to display the indications of the first and second discs alternately through the aperture. The invention also relates to a timepiece movement including such a mechanism, and to a timepiece such as a wrist watch, a pocket watch, a clock or a miniature clock including such a timepiece movement.

Abstract: Disclosed is a timepiece assembly including at least two elements in contact and mobile relative to each other, one of the elements having at least a first contact surface intended to rub against at least a second contact surface of the other element under dry lubrication conditions. At least one of the first and second contact surfaces is covered with a hydrophobic coating having an angle of contact with water greater than 90°, preferably greater than 100° and preferably greater than 110°, and a coefficient of friction lower than 0.15, preferably lower than 0.12 and preferably lower than 0.1, the variation in the coefficient of friction as a function of the relative humidity being lower than 25%, preferably lower than 10% and preferably lower than 5%.

Abstract: Disclosed is a timepiece component including at least one housing intended to receive at least one precious or non-precious stone and including at least one first end, referred to as the setting end, and a rail. The rail is located on the periphery of the housing, and is arranged to allow the stone or stones to be inserted into the rail at the first end of the housing, such that the stone or stones can slide in the rail along the longitudinal axis of the housing, and to hold the stone or stones once inserted into the rail in a direction perpendicular to the longitudinal axis of the housing.

Abstract: Disclosed is a method including the following steps: a) providing a substrate including a first silicon layer, a second silicon layer and an intermediate silicon oxide layer therebetween; b) etching the first silicon layer in order to form the timepiece components therein; c) releasing from the substrate a wafer formed by at least all or part of the etched, first silicon layer and including the timepiece components; d) thermally oxidizing and then deoxidizing the timepiece components; e) forming by thermal oxidation or deposition a silicon oxide layer on the timepiece components; f) detaching the timepiece components from the wafer.

Abstract: The display device is arranged in a timepiece which includes a counting wheel and a manual control mechanism which is arranged to permit cyclical starting, stopping and resetting of the counting wheel. The display device includes an indicating member, a unit for moving the indicating member into a first predefined position when the counting wheel is being reset, a unit for moving the indicating member into a second predefined position, different from the first predefined position, when the counting wheel is being started, and a unit for permitting the indicating member to be moved into a reading position following stopping of the counting wheel, the reading position being determined by the position of the counting wheel.

Abstract: The micromechanical clockwork part is cut from a plate-like silicon substrate. The cut edges of the part include portions intended to serve as contact surfaces arranged to slide against corresponding contact zones of another micromechanical part in a clockwork piece. The cut edges have a ribbed surface including an alternating set of ribs and furrows, the ribs and the furrows being straight and each contained in a plane parallel to the plate. Moreover, the ribs and furrows which the cut edges have form a stepped pattern on the cut edge, with first intervals in which the spacing separating the ribs from one another is equal to a first distance, and at least one second interval in which the spacing between the ribs is equal to a second distance different from the first distance.