Eta Sa Manufacture Horlogere Suisse

Montres Jaquet Droz Sa

Compagnie Des Montres Longines, Francillon S.a.

Olivier Mertenat

Baptist Wyssbrod

David Philippon

A display hand intended to equip a timepiece, including a body and a pipe, providing an arbor hole arranged for fitting the display hand onto a drive arbor. The body is made of a composite material, the pipe includes, over all or part of the outer periphery, a surface for connection to the hand body to ensure the adhesion of the composite material to the pipe.

Analogue display hand

A timepiece wheel set, including an arbor including a housing for reception of a plate and including, on either side of the housing, an axial abutment surface maintained in abutment on the plate, which includes a radially resilient arm and a second arm forming together a clamp clamping a radial bearing surface of the arbor in proximity to the axial abutment surface. The arbor further includes an entry ramp arranged to push back radially the first resilient arm and the second resilient arm, to allow the plate to be placed on the arbor.

Timepiece wheel set

A timepiece movement including a first lever bearing a first drive wheel, a second lever bearing a second wheel for time setting, and a third lever bearing a date correction mechanism. The third lever is mounted to pivot on the second lever and arranged to move between a meshing position, in which the date correction mechanism cooperates with the date display mechanism, and a retraction position, in which the date correction mechanism is disconnected from the date display mechanism. The first and second levers are arranged to occupy at least one date correction position, in which the first drive wheel is kinematically connected to the date correction mechanism and is not kinematically connected to the second wheel for time setting, and a time setting position, in which the first drive wheel is kinematically connected to the second wheel for time setting and is not kinematically connected to the date correction mechanism, wherein the position of the second lever is modified by cooperation between the first lever and the second lever.

Timepiece movement comprising a date correction mechanism

A balance staff including a main shoulder of a balance, a first radial lateral bearing surface for this balance, a roller sleeve shoulder, and a balance spring collet shoulder. The roller shoulder is adjacent to a first radial shoulder, the collet shoulder is adjacent to a second lateral surface, which defines, with the first radial shoulder, a collar including the balance shoulder which is adjacent to a first lateral bearing surface for the bearing of a balance, the first lateral bearing surface facing the same side as the first radial shoulder, the balance shoulder is separated from this collet shoulder by a seat forming the largest diameter of the collar.

Timepiece balance

A timepiece movement for a watch, including a main plate and a bar holding a wheel set in a reference position, and a device to adjust the height of this bar in relation to the plate in the direction of the axis of rotation of the wheel set, at a first point remote from the reference position, and this height adjustment device includes a screw or a worm rotatably movable about an oblique control axis in relation to the axis of rotation, and a cone or a curved surface for transforming motion between this screw or worm and a pusher movable in a parallel direction to the axis of rotation.

Mechanical adjustment of the shake of a timepiece wheel set

The column wheel () for a 3 stroke mechanism has a hub () arranged at the centre of a superstructure exhibiting rotational symmetry of order n, the superstructure including n radial arms () and n columns () parallel to the axis of rotation of the column wheel, the columns being regularly distributed along the circumference of the column wheel and separated from each other by n empty spaces forming as many openings between the columns. The column wheel is characterized in that the width of the columns () is larger than the openings between the columns, and in that the width of the arms () is less than half the width of the columns ().

Column wheel and chronograph mechanism including the same

The pusher device of the chronograph mechanism includes a pivoting control part () mounted on a first pivot () and carrying a click () and an intermediate lever () mounted on a second pivot (). The intermediate lever is arranged to be actuated by the push button and includes a distal portion arranged to actuate the pivoting control part (). The first pivot () and the second pivot () are arranged at the periphery of the movement on both sides of the push button () and the pivoting control part and the intermediate lever extend from their respective pivot against each other. The click () is arranged to push in front of it one tooth of the toothing () of the column wheel () when the push button is actuated, then to return by sliding over the tip of a tooth.

Chronograph mechanism with a column wheel and timepiece movement including the same

Timepiece assembly () comprising a middle part () cooperating in abutment with a bottom plate () and a screw () for securing () this bottom plate () to this middle part (), cooperating with an axis (D) housing () of this plate (), to press a flange () onto a first shoulder () of this plate () in proximity and on a second shoulder () of this middle part (), and this first shoulder () is conical or spherical and/or this second shoulder () which is conical or spherical, cooperates with this flange () on at least two surfaces or points, in an assembled position wherein this plate () and this middle part () are assembled to each other and in the position wherein this screw () is completely screwed into this housing ().

Timepiece assembly wherein a bottom plate is centred and secured relative to a middle part

A driving member for a timepiece movement comprises two superimposed coaxial barrels () coupled in series, each barrel including a spring provided in a cylindrical housing rotatingly mounted on a common shaft (). The respective housings () of the barrels are positioned opposite each other and do not include a lid, and the springs () are separated only by a separation washer () or a gap. This arrangement can be used for increasing the height (H) of the springs, and thereby the amount of energy and the power reserve of the watch for an identical global volume of the driving member, or for reducing the total height of the driving member. Such a driving member is particularly intended for watches with a high power reserve.

Growing community of inventors

Solothurn, Switzerland

Olivier Mertenat