Eta Sa Manufacture Horlogere Suisse

Eta Sa Fabriques D'ebauches

Omega Sa

Other

Baptist Wyssbrod

Laurent Kaelin

Julien Christan

Arthur Queval

Olivier Mertenat

Daniel Gruenig

Pascal Lagorgette

Ivan Villar

Nakis Karapatis

Julien Saglini

Laurent Klinger

David Benjamin Kraehenbuehl

Yannick Hunziker

Stephane Bachmann

Julien Moulin

Stéphane Bachmann

David Philippon

Roger Marquis

Olivier Rebetez

St&eacute;phane Claude

Matthieu Erard

Brice Robin

Piotr Mazanowski

A key for holding a dial foot, the key including a cylindrical head arranged at the end of a rod, the head and the rod being coaxial, the head including a flat and a collar extending over a portion of its periphery in an angular sector defined around the longitudinal axis of the rod, on either side of the flat. The collar includes a cross section with a frustoconical shape and, with respect to the periphery of the head, forms a minimum radial projection, substantially zero, at the ends of this angular sector and forms a maximum radial projection between these ends.

Key for holding a dial on the plate of a horological movement

A mechanical horological movement () including at least one barrel system () for driving a set of wheels and power reserve detector. The detector () includes a control wheel () disposed opposite the cage of the barrel system () and is rotated by a complementary wheel () at the differential output to determine a power reserve level. An aperture () has a first end () to define a complete charge of the barrel system and a second end () to define a complete discharge. A lever () is rotatably mounted about a lever axis parallel to the axis of rotation of the control wheel. A contact element () disposed in the aperture contacts the second end during a zero power reserve indication. A portion of the lever contacts a component of the movement to stop its operation when power reserve indication is at zero.

Mechanical horological movement with power reserve detection

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

Device with coaxial disengageable wheels for a timepiece movement including an input wheel, an output wheel, a hub, and a jumper mechanism including a spring and positioning elements defining a certain number of discrete angular positions of the input wheel with respect to the output wheel around an axis of rotation. The positioning elements including hollow elements and protruding elements, the spring being configured to apply an elastic force pushing the protruding elements against the hollow elements to couple the wheels to each other below a disengagement torque. The protruding elements and the hollow elements extend in the axial direction and the spring is configured to apply an elastic force in the axial direction.

Coaxial disengageable wheels for a timepiece movement

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:

Balance spring stud-holder

The timepiece movement is fitted with an analogue indicator (), particularly a date ring including a toothing () mechanically coupled to a drive device, which includes a motor and a drive wheel and pinion () and a support for the drive wheel and pinion. This support is pivotally mounted on a main plate about a first axis and it defines a second axis, remote from the first axis, about which the drive wheel and pinion is rotatably mounted. The drive device further includes a strip spring () exerting a force on the support such that the meshing means of the drive wheel and pinion press against the toothing of the analogue indicator. The meshing means and the toothing have respective profiles selected such that, at least in a plurality of distinct display positions of the analogue indicator, the drive wheel and pinion and the analogue indicator mesh with each other with substantially no play under the action of the strip spring.

Device for driving an analogue indicator, particularly a date ring

A timepiece movement driving at least one output arbor for receiving an indicator displaying a physical or temporal magnitude facing and above a complementary indicator or a dial, the complementary indicator or dial being arranged on a local reference or bearing surface included locally in the movement about of each the output arbor of the movement, or being arranged on the local reference or bearing surface. The output arbor includes, on a side of a local reference or bearing surface thereof, a free end which is either recessed or flush with respect to the local reference or bearing surface thereof.

Below dial hand fitting

Device for the micrometric endshake adjustment of a timepiece wheel set in an axial direction in relation to a structure, including a pivot bearing for this wheel set defining an axial stop member for this wheel set in this axial direction, and this device includes an adjustment stage of variable thickness in this axial direction, which includes at least one elastic return for pushing a first component provided with pivot drive means operable by a tool and carrying this bearing onto a second component fixed to this structure directly, or via at least one case, and this elastic return means are supported on this structure directly or via at least one case.

Micrometric adjustment of the endshake of a timepiece wheel set

The timepiece movement is provided with an analog device for displaying information whose value varies periodically or intermittently, this analog display device including, on the one hand, an indicator provided with a first toothing, and on the other hand, a mechanism for the periodic or intermittent driving of the indicator. The drive mechanism is formed by an irreversible transmission system which ensures a shock resistant function for the indicator. The display device further includes a positioning jumper for the indicator generating a positioning force on the first toothing, which is sufficient to precisely position the indicator in a plurality of discrete display positions, but considerably insufficient to ensure a shock resistant function for the indicator. Thus, the indicator can be driven with a relatively low torque; which therefore requires less energy and makes it possible to provide a drive mechanism with a lower gear reduction for the drive torque transmission ratio.

Timepiece movement provided with a drive mechanism for the periodic or intermittent movement of an analogue indicator

A timepiece movement includes a plate and a bridge carrying a barrel, which includes a barrel mainspring between a drum and a receiving surface of a steel or stainless steel core and a cover fixed to the drum. The spring is made of a multiphase, cobalt-nickel-chromium based alloy, having a Young's modulus of between 200 and 240 GPa and a shear modulus of between 80 and 100 GPa, and having a width to thickness ratio of between 3 and 23, and a maximum radius of the steel or stainless steel core relative to a pivot axis is less than nine times a maximum thickness of the spring. The movement includes a shake limiting mechanism including a shim-washer independent of the core and guided by a shoulder of the core.

Timepiece movement having a barrel with reduced core diameter

A timepiece barrel assembly, including a barrel mainspring mounted between a barrel drum and a receiving surface of a barrel core coaxial to the drum. The spring is made of a multiphase, cobalt-nickel-chromium based alloy, having a Young's modulus of between 200 and 240 GPa and a shear modulus of between 80 and 100 GPa, and having a width to thickness ratio of between 9 and 21, and the maximum radius of the steel or stainless steel core relative to its pivot axis is less than nine times the maximum thickness of the spring, and the barrel assembly includes, on the spring or the drum, a mechanism limiting longitudinal clearance, towards the pivot axis, between the drum and the mainspring.

Timepiece barrel assembly with reduced core diameter

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

Positioning device () between a bridge () and a plate (). This plate () includes: for centering this bridge (), a female arrangement () with faces () receiving a cylindrical smooth centering pin (), fixed to this bridge () and abutting on these faces, for aligning this bridge () on this plate (), an alignment housing () with parallel faces () aligned on this female arrangement (), receiving an alignment pin (), fixed to this bridge (). Collet () arranged to be fixed to a plate and including this female centering arrangement (). Timepiece including a device () or collet () of this type. Method of assembling this bridge () on this plate () with this device ().

Device for positioning a bridge on a plate

Timepiece movement including a module fitted with a first wheel set meshing with a second wheel set, which pivots on a base on which the module is mounted. The movement includes a means of positioning the module formed by a cam, at least most of the periphery of which forms an Archimedes' spiral. The cam is arranged so as to allow the distance of centers between the first and second wheel sets to be adjusted, when the cam is rotated on itself about the center of the Archimedes' spiral. The cam is preferably calibrated. The invention also concerns a method of adjusting the distance of centers between the two wheel sets using said cam to optimise the gearing efficiency of the two wheel sets.

Timepiece movement comprising a module fitted with a wheel set meshing with another wheel set pivoting in a base on which the module is mounted

Timepiece () including a case () in which systems () are mounted for operating the timepiece, controlled by control members () that project from the case, at least one of the control members () cooperating with an anti-shock device () mounted in the case () and including a main component (), which is moveably mounted relative to the case (), characterized in that the main component () includes a permanent mechanical connection with the part () of each system () to which the at least one control member is attached, which enables the component to be reversibly uncoupled from the at least one control member () when a force greater than a predetermined threshold is exerted on the at least one control member and in that the mechanical connection is of the sliding type, and includes a jumper spring () elastically mounted relative to a pin ().

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Nidau, Switzerland

Baptist Wyssbrod