Eta Sa Manufacture Horlogere Suisse

Julien Christan

Thierry Conus

Laurent Kaelin

Ivan Villar

Baptist Wyssbrod

Patrick Moller

Pascal Lagorgette

Christophe Cattin

Daniel Gruenig

Anne Philipps

Fabrice Delevaux

Mark Postmus

Patrick Möller

A bolt () configured to limit the axial travel of a moving body () of a horological movement (). The bolt includes a head () arranged at the end of an arbor () extending according to a longitudinal axis of revolution, the head () extending radially with respect to the arbor () and including over a portion of its periphery, a radial addendum () configured to be arranged opposite said moving body (), and including, at the interface with the arbor (), a bearing base () through which the bolt () is configured to rest against a structure () of the horological movement ().

Bolt intended to limit the axial travel of a moving body of a horological movement and horological movement including the same

A timepiece display mechanism includes at least one display having a shaft, and having at least one plate and/or a bridge carrying at least one guide device for carrying and guiding this shaft around an axis, including, on a first side of said axis, a support surface comprising a V-shape or a pad, symmetrical with respect to a bisector plane passing through the axis, to centre the axis of the shaft on this bisector plane, and on a second opposite side, at least one holding element substantially diametrically opposite the support surface, all the holding elements exerting on this shaft a resultant elastic return force directed towards the axis, and preventing any radial exit of this shaft out of the guide bearing which is a platform with two parallel faces.

Timepiece display mechanism

A watch including a dial including a fixed portion superimposed on a portion movable in rotation including a surface on which are arranged areas with visual appearances different from each other, the fixed portion including at least one through opening emerging on at least one of the areas, the movable portion being kinematically connected to a control member so as to be rotated by actuating the control member and being configured so that when it is rotated, the areas of different visual appearance appear successively through the opening.

Watch comprising a dial including a fixed portion and a movable portion

A stop pawl for a horological movement, including a body provided on the periphery with a lug for latching with the toothing of a ratchet; a hub intended to cooperate freely in rotation with a fixed rod according to an angular displacement between an active position meshing the lug with the toothing of the ratchet and an inactive position, via intermediate positions; wherein the pawl includes at least one device for returning the pawl during its angular displacement, from the inactive position to the active position; and wherein the return device and the body are made in one piece. A horological movement and timepiece can include such a pawl.

Stop pawl for horological movement

A twisted arbour barrel (), including a barrel drum () provided with a housing, a spring arranged in the housing of the barrel drum (), an arbour () at least partially passing through the housing, the spring being compressed by rotation of the arbour in a first direction of rotation (), the arbour () being provided with a protruding end () of the drum (), a ratchet () arranged on the drum (), the ratchet () being configured to allow the rotation of the arbour () in the first direction of rotation (), the protruding end () passing through the ratchet () through an opening () cooperating by interlocking with the protruding end (), the protruding end () of the arbour () having a twisted shape around its axis.

Timepiece barrel with a twisted arbour

A horological torque limiting mechanism, including a first wheel with a first elastic arm projecting from a first felloe, a second wheel including a second surface to engage in frictional pressure with the first wheel for the relative actuation thereof, a travel limiter fastened to a structure to hold the first and second wheels in frictional pressure in certain angular positions, the second wheel and/or the travel limiter and/or the structure including a relief forming a ramp, to, in certain angular positions relative to the first wheel, engage in frictional pressure with the first elastic arm, and, in further positions, allow a frictionless travel between the first wheel and the component bearing the relief, the second wheel includes a second arm forming a ramp projecting from a second felloe.

Horological torque limiting mechanism

A balance-spring stud for fixing with a spot of glue a free end of a last turn on the outside of a spiral spring for a timepiece movement, this balance-spring stud includes a base within a plane, first and second arms extending from the plane and free at their end opposite the base, the first and second arms being separated from one another by a gap in which the free end of the last turn on the outside of the spiral spring that is trapped in the hardened spot of hardened glue is housed, at least one of the first and second arms being provided with a stop device arranged to prevent the spot of hardened glue in which the free end of the last turn on the outside of the spiral spring is trapped from being released from the gap in which the spot of hardened glue is housed when this spot of hardened glue no longer adheres to the balance-spring stud.

Balance-spring stud for fixing a spiral spring of a timepiece movement and method for manufacturing such a balance-spring stud

An assembly for holding or supporting a timepiece balance spring, includes a balance spring stud and a stud-holder, the stud-holder includes a base having at least one circular portion, the base including, on the circular portion, a first lug and a second lug each extending radially. One of the two lugs includes an elastic arm extending from the lug, in a direction parallel to that of the base, towards the other lug, the elastic arm forming with the base a housing for housing the balance spring stud therein and the first and second lugs are able to cooperate with a tool to allow the balance spring stud to exert a stress on the elastic arm to deform the latter and permit the assembly or disassembly of the stud.

Balance spring stud-holder with simplied assembly

The invention relates to a balance-spring stud-holder for a mechanical timepiece movement, which comprises a pair of tabs, namely a front tab and a rear tab, jointly defining a notch, the tabs being arranged in such a way that a balance-spring stud can be held in the notch, wherein the rear tab of the balance-spring stud-holder comprises an extension which defines, beyond the notch, a bend forming a retaining abutment for the balance-spring stud after said balance-spring stud has been extracted from the notch.

Balance-spring stud-holder for a mechanical timepiece movement

An assembly for holding or supporting a timepiece balance spring, including a balance spring stud and a stud-holder, wherein the stud-holder includes a base having at least one circular portion, the base including, on the circular portion, a first lug and a second lug each extending radially; one of the two lugs including an elastic arm extending from the lug, in a direction parallel to that of the base, towards the other lug, the elastic arm forming with the base a housing for housing the balance spring stud therein and in that the first and second lugs are able to cooperate with a tool to allow the balance spring stud to exert a stress on the elastic arm to deform the latter and permit the assembly or disassembly of the stud.

Method for attachment of a last outer coil of a timepiece balance spring inside a groove provided in a balance spring stud, wherein the method includes the step of adhesive bonding the last outer coil of the timepiece balance spring by means of a fluid adhesive whose viscosity is comprised between 200 and 400 mPa&#xb7;s.

Method for attachment of a balance spring for a mechanical timepiece movement and balance spring attached by such a method

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

An assembly for holding or supporting a timepiece balance spring including a base provided with an upper surface and a lower surface on which a balance spring stud and a stud-holder are arranged. The stud-holder secures the stud to an escapement mechanism.

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.

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Bienne, Switzerland

Julien Christan