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EP4092491B1 - Timepiece movement with clutch - Google Patents

Timepiece movement with clutch Download PDF

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Publication number
EP4092491B1
EP4092491B1 EP21174717.5A EP21174717A EP4092491B1 EP 4092491 B1 EP4092491 B1 EP 4092491B1 EP 21174717 A EP21174717 A EP 21174717A EP 4092491 B1 EP4092491 B1 EP 4092491B1
Authority
EP
European Patent Office
Prior art keywords
wheel
mobile
chronograph
timepiece movement
seconds
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP21174717.5A
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German (de)
French (fr)
Other versions
EP4092491A1 (en
Inventor
Salvatore Palermo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP21174717.5A priority Critical patent/EP4092491B1/en
Publication of EP4092491A1 publication Critical patent/EP4092491A1/en
Application granted granted Critical
Publication of EP4092491B1 publication Critical patent/EP4092491B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • G04B19/025—Back-gearing arrangements between gear train and hands for simultaneous indicating on several dials
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/001—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0823—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
    • G04F7/0838—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement involving a tilting movement

Definitions

  • the present invention relates to a watch movement comprising a clutch device, in particular a clutch device allowing the starting and stopping of a chronograph.
  • a clutch lever In classic chronographs, a clutch lever carries a clutch wheel that permanently meshes with a chronograph drive wheel, called a field wheel, which is part of the seconds wheel of the finishing train. In an engaged position of the clutch lever, the clutch wheel meshes with a chronograph wheel to transmit the rotation of the seconds wheel, thus rotating a chronograph hand carried by the chronograph wheel. In a disengaged position of the clutch lever, the clutch wheel does not mesh with the chronograph wheel and the latter is held stationary by a brake or a hammer.
  • the chronograph wheel rotates in the same direction as the seconds wheel, allowing the chronograph hand to rotate in the correct direction, namely clockwise.
  • the chronograph hand in the opposite direction to the rotation of the seconds wheel. This is the case, for example, with double-sided watches where the hours, minutes and seconds of the time measured by the watch movement are displayed on one side of the watch, with the seconds displayed off-center by a small hand attached to the seconds wheel, and where the chronograph hand, centered, is made visible on the opposite side.
  • the present invention aims to solve the above-mentioned problems and to this end proposes a timepiece movement comprising a power source, a finishing train, an escapement connected to the power source by the finishing train, a resonator cooperating with the escapement, a driven wheel set, a clutch lever and a clutch wheel controlled by the clutch lever so as, in an engaged position of the clutch lever, to mesh with the driven wheel set in order to transmit the rotation of the finishing train to the driven wheel set and, in a disengaged position of the clutch lever, to be out of contact with the driven wheel set, characterized in that the clutch wheel is part of a wheel set of the finishing train.
  • the present invention further provides a timepiece, such as a pocket watch, a pendant watch, a wristwatch or a clock, comprising such a watch movement.
  • a timepiece such as a pocket watch, a pendant watch, a wristwatch or a clock, comprising such a watch movement.
  • a watch movement 1 for a timepiece such as a pocket watch, a pendant watch, a wristwatch or a clock, comprises an energy source 2 constituted for example by one or more barrels, a going train 4, an escapement 6 connected to the energy source 2 by the going train 4 and a resonator 8, such as a sprung balance or a flexible guide resonator, the oscillations of which are maintained by the escapement 6.
  • the going train 4 drives a current time display 10 visible through a first crystal of the timepiece.
  • the current time display 10 is formed by hour, minute and second indicator hands associated with a first dial, the second indicator hand being a small hand eccentric relative to the first dial and the watch movement 1.
  • the finishing gear train 4 also drives, on demand, a chronograph mechanism 12 which controls a chronograph display 14.
  • the latter comprises a chronograph hand indicating the chronograph seconds and possibly counter hands indicating the chronograph minutes and hours, this or these hands cooperating with a second dial.
  • the chronograph display 14 is visible through a second crystal of the timepiece located on the face of the timepiece opposite that receiving the first crystal.
  • the finishing gear 4 comprises a center wheel meshing with the energy source 2, a middle wheel meshing with the center wheel and a second wheel meshing with the middle wheel and with the escapement pinion of the escapement 6.
  • the second mobile 18 carries the hand indicating the seconds of the current time, designated by 20.
  • the hands indicating the hours and minutes of the current time are driven by the center wheel in the traditional manner.
  • the chronograph hand, designated 22, is carried by a chronograph wheel 24 located in the center of the watch movement 1, this chronograph wheel 24 driving, if applicable, a minute counter which in turn drives an hour counter.
  • the second wheel 18 comprises, in a conventional manner, a shaft 26 to which a second wheel 28 and a second pinion 30 are secured.
  • the second wheel 28 meshes with the escapement pinion.
  • the second pinion 30 meshes with the wheel of the middle wheel 16.
  • the watch movement 1 is mounted in a frame conventionally comprising a plate 32 and bridges (not shown) fixed to the plate 32.
  • the plate 32 is on the current time display side 10 and the bridges on the chronograph display side 14.
  • the shaft 26 of the second wheel set 18 pivots on one side in a fixed part, namely, in the example illustrated, in a tube 34 fixed to the plate 32 and on the other side in a clutch lever 36 pivotally mounted relative to the plate 32 around an axis B which is distinct from the axis A of the shaft 26 of the second wheel set 18.
  • the shaft 26 of the second wheel set 18 carries a clutch wheel or field wheel 38 secured to the wheel and the second pinion 28, 30.
  • the stones 40, 42 which serve as bearings for the shaft 26 preferably have an olive-shaped hole.
  • the shaft 26 could pivot directly in the plate 32 rather than in a tube 34.
  • the clutch lever 36 is subjected to the action of a return spring (not shown) which allows it to cooperate with a column wheel 44 controlled by the user via a pusher (not shown). Depending on the angular position of the column wheel 44, the clutch rocker 36 can occupy an engaged position and a disengaged position.
  • the clutch lever 36 keeps the shaft 26 of the second wheel set 18 substantially perpendicular to the plate 32 and parallel to the axis B, which keeps the clutch wheel 38 out of contact with the chronograph wheel set 24.
  • the finishing gear 4 rotates continuously, driving the display of the current time 10 but without driving the chronograph wheel set 24 which remains stationary under the action of a brake or a hammer controlled by the column wheel 44.
  • the clutch lever 36 tilts the shaft 26 of the second wheel set 18 in the direction of the chronograph wheel set 24, as represented in an exaggerated manner by the angle ⁇ on the Figure 3 , thus causing the teeth of the clutch wheel 38 to enter those of the chronograph wheel set 24.
  • the brake or the hammer no longer acts on the chronograph wheel set 24 so that the finishing gear 4 drives the latter in rotation. The chronograph is thus in operation until the user stops it by pressing the pusher again to return the clutch lever 36 to its disengaged position.
  • the second pinion 30 continues to mesh with the middle wheel 16.
  • the teeth of the second pinion 30 and the wheel of the middle wheel 16 are in fact sized to avoid any jamming when the clutch lever 36 is in the engaged position.
  • the present invention allows the eccentric running time seconds hand 20 carried by the seconds wheel 18 and the chronograph hand 22 to each rotate in the correct direction, namely clockwise, when one or other of these hands is seen through its respective crystal. This result is obtained without the addition of any reference outside the finishing gear 4, i.e. outside of the kinematic chain between the energy source 2 and the exhaust 6, a return which would be likely to generate gear play.
  • the finishing gear 4 is permanently tensioned by the torque exerted on it by the energy source 2 and by its cooperation with the escapement 6.
  • the torque it transmits to the chronograph wheel set 24 is therefore without gear play.
  • the display accuracy is improved even compared to traditional chronographs with a display of the current time and the measured time on a single face.
  • the present invention is also of particular interest in the case of a so-called indirect second, where the current time seconds hand is centered but driven indirectly by the off-center seconds wheel 18.
  • the invention avoids the need for an additional return outside the going train, in the kinematic chain connecting the seconds wheel to the seconds hand or between the going train and the chronograph wheel.
  • the present invention is not limited to a watch movement comprising a chronograph mechanism. It can be applied to any watch movement comprising a mechanism, chronograph, animation or other, controlled by means of a clutch, with the aim of rotating the mechanism in the opposite direction to the second wheel of the finishing train, or more generally to the wheel of the finishing train which controls said mechanism, without increasing the gear play.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Description

La présente invention concerne un mouvement horloger comprenant un dispositif d'embrayage, en particulier un dispositif d'embrayage permettant le départ et l'arrêt d'un chronographe.The present invention relates to a watch movement comprising a clutch device, in particular a clutch device allowing the starting and stopping of a chronograph.

Dans les chronographes classiques, une bascule d'embrayage porte une roue d'embrayage qui engrène en permanence avec une roue entraîneuse de chronographe, dite roue sur champ, faisant partie du mobile de seconde du rouage de finissage. Dans une position embrayée de la bascule d'embrayage, la roue d'embrayage engrène avec un mobile de chronographe pour lui transmettre la rotation du mobile de seconde, faisant ainsi tourner une aiguille de chronographe portée par le mobile de chronographe. Dans une position débrayée de la bascule d'embrayage, la roue d'embrayage n'engrène pas avec le mobile de chronographe et ce dernier est maintenu immobile par un frein ou un marteau.In classic chronographs, a clutch lever carries a clutch wheel that permanently meshes with a chronograph drive wheel, called a field wheel, which is part of the seconds wheel of the finishing train. In an engaged position of the clutch lever, the clutch wheel meshes with a chronograph wheel to transmit the rotation of the seconds wheel, thus rotating a chronograph hand carried by the chronograph wheel. In a disengaged position of the clutch lever, the clutch wheel does not mesh with the chronograph wheel and the latter is held stationary by a brake or a hammer.

Dans ce type de mécanisme, le mobile de chronographe tourne dans le même sens que le mobile de seconde, permettant à l'aiguille de chronographe de tourner dans le bon sens, à savoir le sens horaire. Il est cependant des situations où l'on a besoin de faire tourner l'aiguille de chronographe dans le sens contraire du sens de rotation du mobile de seconde. C'est le cas par exemple des montres à double face où les heures, minutes et secondes du temps mesuré par le mouvement horloger sont affichées sur une face de la montre, avec les secondes affichées de manière excentrée par une petite aiguille solidaire du mobile de seconde, et où l'aiguille de chronographe, centrée, est rendue visible sur la face opposée. Il convient alors d'ajouter un renvoi entre le mobile de seconde et la roue d'embrayage ou entre la roue d'embrayage et le mobile de chronographe. Contrairement au rouage de finissage, qui est toujours sous tension, un tel renvoi, comme la roue d'embrayage, présente un jeu d'engrenage qui va affecter la précision d'affichage du chronographe. On peut supprimer ce jeu par une roue à rattrapage de jeu mais cela complique le mécanisme. Le jeu peut aussi être supprimé par un apport de friction, mais avec des conséquences néfastes en termes d'usure. Le document CH 714 798 A1 montre un chronographe comportant un mobile d'embrayage à deux roues.In this type of mechanism, the chronograph wheel rotates in the same direction as the seconds wheel, allowing the chronograph hand to rotate in the correct direction, namely clockwise. However, there are situations where it is necessary to rotate the chronograph hand in the opposite direction to the rotation of the seconds wheel. This is the case, for example, with double-sided watches where the hours, minutes and seconds of the time measured by the watch movement are displayed on one side of the watch, with the seconds displayed off-center by a small hand attached to the seconds wheel, and where the chronograph hand, centered, is made visible on the opposite side. In this case, it is necessary to add a return wheel between the seconds wheel and the clutch wheel or between the clutch wheel and the chronograph wheel. Unlike the finishing gear, which is always under tension, such a return wheel, like the clutch wheel, has a gear play that will affect the display accuracy of the chronograph. This play can be eliminated by a play-compensating wheel, but this complicates the mechanism. The play can also be eliminated by an input of friction, but with harmful consequences in terms of wear. The document CH 714 798 A1 shows a chronograph with a two-wheel clutch wheel.

Ces problèmes se rencontrent également dans d'autres contextes que celui d'un chronographe, par exemple dans les mouvements horlogers dont le rouage de finissage commande une animation par l'intermédiaire d'un embrayage, animation que l'on souhaite faire tourner dans le sens contraire du sens de rotation du mobile du rouage de finissage qui la commande.These problems are also encountered in contexts other than that of a chronograph, for example in watch movements whose going train controls an animation via a clutch, an animation that we wish to rotate in the opposite direction to the direction of rotation of the moving part of the going train which controls it.

La présente invention vise à résoudre les problèmes susmentionnés et propose à cette fin un mouvement horloger comprenant une source d'énergie, un rouage de finissage, un échappement relié à la source d'énergie par le rouage de finissage, un résonateur coopérant avec l'échappement, un mobile mené, une bascule d'embrayage et une roue d'embrayage commandée par la bascule d'embrayage pour, dans une position embrayée de la bascule d'embrayage, engrener avec le mobile mené afin de transmettre au mobile mené la rotation du rouage de finissage et, dans une position débrayée de la bascule d'embrayage, être hors de contact avec le mobile mené, caractérisé en ce que la roue d'embrayage fait partie d'un mobile du rouage de finissage.The present invention aims to solve the above-mentioned problems and to this end proposes a timepiece movement comprising a power source, a finishing train, an escapement connected to the power source by the finishing train, a resonator cooperating with the escapement, a driven wheel set, a clutch lever and a clutch wheel controlled by the clutch lever so as, in an engaged position of the clutch lever, to mesh with the driven wheel set in order to transmit the rotation of the finishing train to the driven wheel set and, in a disengaged position of the clutch lever, to be out of contact with the driven wheel set, characterized in that the clutch wheel is part of a wheel set of the finishing train.

La présente invention propose en outre une pièce d'horlogerie, telle qu'une montre de poche, une montre pendentif, une montre-bracelet ou une pendulette, comprenant un tel mouvement horloger.The present invention further provides a timepiece, such as a pocket watch, a pendant watch, a wristwatch or a clock, comprising such a watch movement.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est un schéma-bloc d'un mouvement horloger selon l'invention ;
  • la figure 2 est une vue de dessus d'une partie du mouvement horloger selon l'invention ;
  • la figure 3 est une vue en coupe d'une partie du mouvement horloger selon l'invention.
Other features and advantages of the present invention will become apparent from the following detailed description given with reference to the appended drawings in which:
  • there Figure 1 is a block diagram of a watch movement according to the invention;
  • there Figure 2 is a top view of a part of the watch movement according to the invention;
  • there Figure 3 is a sectional view of a part of the watch movement according to the invention.

En référence à la figure 1, un mouvement horloger 1 selon un mode de réalisation particulier de l'invention, pour une pièce d'horlogerie telle qu'une montre de poche, une montre pendentif, une montre-bracelet ou une pendulette, comprend une source d'énergie 2 constituée par exemple par un ou plusieurs barillets, un rouage de finissage 4, un échappement 6 relié à la source d'énergie 2 par le rouage de finissage 4 et un résonateur 8, tel qu'un balancier-spiral ou un résonateur à guidage flexible, dont les oscillations sont entretenues par l'échappement 6.In reference to the Figure 1 , a watch movement 1 according to a particular embodiment of the invention, for a timepiece such as a pocket watch, a pendant watch, a wristwatch or a clock, comprises an energy source 2 constituted for example by one or more barrels, a going train 4, an escapement 6 connected to the energy source 2 by the going train 4 and a resonator 8, such as a sprung balance or a flexible guide resonator, the oscillations of which are maintained by the escapement 6.

Outre l'échappement 6, le rouage de finissage 4 entraîne un affichage du temps courant 10 visible à travers une première glace de la pièce d'horlogerie. L'affichage du temps courant 10 est formé d'aiguilles indicatrices des heures, des minutes et des secondes associées à un premier cadran, l'aiguille indicatrice des secondes étant une petite aiguille excentrée par rapport au premier cadran et au mouvement horloger 1.In addition to the escapement 6, the going train 4 drives a current time display 10 visible through a first crystal of the timepiece. The current time display 10 is formed by hour, minute and second indicator hands associated with a first dial, the second indicator hand being a small hand eccentric relative to the first dial and the watch movement 1.

Le rouage de finissage 4 entraîne également, à la demande, un mécanisme de chronographe 12 qui commande un affichage de chronographe 14. Ce dernier comprend une aiguille de chronographe indiquant les secondes de chronographe et éventuellement des aiguilles de compteurs indiquant les minutes et heures de chronographe, cette ou ces aiguilles coopérant avec un deuxième cadran. L'affichage de chronographe 14 est visible à travers une deuxième glace de la pièce d'horlogerie située sur la face de la pièce d'horlogerie opposée à celle recevant la première glace.The finishing gear train 4 also drives, on demand, a chronograph mechanism 12 which controls a chronograph display 14. The latter comprises a chronograph hand indicating the chronograph seconds and possibly counter hands indicating the chronograph minutes and hours, this or these hands cooperating with a second dial. The chronograph display 14 is visible through a second crystal of the timepiece located on the face of the timepiece opposite that receiving the first crystal.

Le rouage de finissage 4 comprend un mobile de centre engrenant avec la source d'énergie 2, un mobile de moyenne engrenant avec le mobile de centre et un mobile de seconde engrenant avec le mobile de moyenne et avec le pignon d'échappement de l'échappement 6. A la figure 2 sont représentés le mobile de moyenne, désigné par 16, et le mobile de seconde, désigné par 18. Le mobile de seconde 18 porte l'aiguille indicatrice des secondes du temps courant, désignée par 20. Les aiguilles indicatrices des heures et des minutes du temps courant sont entraînées par le mobile de centre de manière traditionnelle. L'aiguille de chronographe, désignée par 22, est portée par un mobile de chronographe 24 situé au centre du mouvement horloger 1, ce mobile de chronographe 24 entraînant, le cas échéant, un compteur de minutes qui entraîne à son tour un compteur d'heures.The finishing gear 4 comprises a center wheel meshing with the energy source 2, a middle wheel meshing with the center wheel and a second wheel meshing with the middle wheel and with the escapement pinion of the escapement 6. At the Figure 2 are represented the average mobile, designated by 16, and the second mobile, designated by 18. The second mobile 18 carries the hand indicating the seconds of the current time, designated by 20. The hands indicating the hours and minutes of the current time are driven by the center wheel in the traditional manner. The chronograph hand, designated 22, is carried by a chronograph wheel 24 located in the center of the watch movement 1, this chronograph wheel 24 driving, if applicable, a minute counter which in turn drives an hour counter.

Comme montré à la figure 3, le mobile de seconde 18 comprend, de manière classique, un arbre 26 duquel sont solidaires une roue de seconde 28 et un pignon de seconde 30. La roue de seconde 28 engrène avec le pignon d'échappement. Le pignon de seconde 30, lui, engrène avec la roue du mobile de moyenne 16.As shown in the Figure 3 , the second wheel 18 comprises, in a conventional manner, a shaft 26 to which a second wheel 28 and a second pinion 30 are secured. The second wheel 28 meshes with the escapement pinion. The second pinion 30 meshes with the wheel of the middle wheel 16.

Le mouvement horloger 1 est monté dans un bâti comprenant classiquement une platine 32 et des ponts (non représentés) fixés à la platine 32. La platine 32 est du côté de l'affichage du temps courant 10 et les ponts du côté de l'affichage de chronographe 14.The watch movement 1 is mounted in a frame conventionally comprising a plate 32 and bridges (not shown) fixed to the plate 32. The plate 32 is on the current time display side 10 and the bridges on the chronograph display side 14.

Dans la présente invention, l'arbre 26 du mobile de seconde 18 pivote d'un côté dans une partie fixe à savoir, dans l'exemple illustré, dans un tube 34 fixé à la platine 32 et de l'autre côté dans une bascule d'embrayage 36 montée pivotante par rapport à la platine 32 autour d'un axe B qui est distinct de l'axe A de l'arbre 26 du mobile de seconde 18. En outre, l'arbre 26 du mobile de seconde 18 porte une roue d'embrayage ou roue sur champ 38 solidaire de la roue et du pignon de seconde 28, 30.In the present invention, the shaft 26 of the second wheel set 18 pivots on one side in a fixed part, namely, in the example illustrated, in a tube 34 fixed to the plate 32 and on the other side in a clutch lever 36 pivotally mounted relative to the plate 32 around an axis B which is distinct from the axis A of the shaft 26 of the second wheel set 18. In addition, the shaft 26 of the second wheel set 18 carries a clutch wheel or field wheel 38 secured to the wheel and the second pinion 28, 30.

Les pierres 40, 42 qui servent de paliers à l'arbre 26 (montées respectivement à l'extrémité du tube 34 et dans la bascule d'embrayage 36) ont de préférence un trou olivé. Dans une variante, l'arbre 26 pourrait pivoter directement dans la platine 32 plutôt que dans un tube 34.The stones 40, 42 which serve as bearings for the shaft 26 (mounted respectively at the end of the tube 34 and in the clutch lever 36) preferably have an olive-shaped hole. In a variant, the shaft 26 could pivot directly in the plate 32 rather than in a tube 34.

La bascule d'embrayage 36 est soumise à l'action d'un ressort de rappel (non représenté) qui lui permet de coopérer avec une roue à colonnes 44 commandée par l'utilisateur via un poussoir (non représenté). En fonction de la position angulaire de la roue à colonnes 44, la bascule d'embrayage 36 peut occuper une position embrayée et une position débrayée.The clutch lever 36 is subjected to the action of a return spring (not shown) which allows it to cooperate with a column wheel 44 controlled by the user via a pusher (not shown). Depending on the angular position of the column wheel 44, the clutch rocker 36 can occupy an engaged position and a disengaged position.

Dans sa position débrayée, la bascule d'embrayage 36 maintient l'arbre 26 du mobile de seconde 18 sensiblement perpendiculaire à la platine 32 et parallèle à l'axe B, ce qui maintient la roue d'embrayage 38 hors de contact avec le mobile de chronographe 24. Le rouage de finissage 4 tourne continûment en entraînant l'affichage du temps courant 10 mais sans entraîner le mobile de chronographe 24 qui reste immobile sous l'action d'un frein ou d'un marteau commandé par la roue à colonnes 44.In its disengaged position, the clutch lever 36 keeps the shaft 26 of the second wheel set 18 substantially perpendicular to the plate 32 and parallel to the axis B, which keeps the clutch wheel 38 out of contact with the chronograph wheel set 24. The finishing gear 4 rotates continuously, driving the display of the current time 10 but without driving the chronograph wheel set 24 which remains stationary under the action of a brake or a hammer controlled by the column wheel 44.

Lorsqu'elle passe de sa position débrayée à sa position embrayée à la suite d'une pression exercée par l'utilisateur sur le poussoir, la bascule d'embrayage 36 incline l'arbre 26 du mobile de seconde 18 en direction du mobile de chronographe 24, comme représenté de manière exagérée par l'angle α sur la figure 3, faisant ainsi entrer la denture de la roue d'embrayage 38 dans celle du mobile de chronographe 24. Dans la position embrayée, le frein ou le marteau n'agit plus sur le mobile de chronographe 24 de sorte que le rouage de finissage 4 entraîne ce dernier en rotation. Le chronographe est ainsi en fonctionnement jusqu'à ce que l'utilisateur l'arrête en appuyant de nouveau sur le poussoir pour remettre la bascule d'embrayage 36 dans sa position débrayée.When it passes from its disengaged position to its engaged position following pressure exerted by the user on the pusher, the clutch lever 36 tilts the shaft 26 of the second wheel set 18 in the direction of the chronograph wheel set 24, as represented in an exaggerated manner by the angle α on the Figure 3 , thus causing the teeth of the clutch wheel 38 to enter those of the chronograph wheel set 24. In the engaged position, the brake or the hammer no longer acts on the chronograph wheel set 24 so that the finishing gear 4 drives the latter in rotation. The chronograph is thus in operation until the user stops it by pressing the pusher again to return the clutch lever 36 to its disengaged position.

Quelle que soit la position de la bascule d'embrayage 36, le pignon de seconde 30 continue d'engrener avec le mobile de moyenne 16. Les dentures du pignon de seconde 30 et de la roue du mobile de moyenne 16 sont en effet dimensionnées pour éviter tout bourrage lorsque la bascule d'embrayage 36 est dans la position embrayée.Whatever the position of the clutch lever 36, the second pinion 30 continues to mesh with the middle wheel 16. The teeth of the second pinion 30 and the wheel of the middle wheel 16 are in fact sized to avoid any jamming when the clutch lever 36 is in the engaged position.

La présente invention permet à l'aiguille excentrée des secondes du temps courant 20 portée par le mobile de seconde 18 et à l'aiguille de chronographe 22 de tourner chacune dans le bon sens, à savoir le sens horaire lorsque l'une ou l'autre de ces aiguilles est vue à travers sa glace respective. Ce résultat est obtenu sans l'ajout d'aucun renvoi hors du rouage de finissage 4, c'est-à-dire hors de la chaîne cinématique entre la source d'énergie 2 et l'échappement 6, renvoi qui serait susceptible de générer des jeux d'engrenage.The present invention allows the eccentric running time seconds hand 20 carried by the seconds wheel 18 and the chronograph hand 22 to each rotate in the correct direction, namely clockwise, when one or other of these hands is seen through its respective crystal. This result is obtained without the addition of any reference outside the finishing gear 4, i.e. outside of the kinematic chain between the energy source 2 and the exhaust 6, a return which would be likely to generate gear play.

Comme tout rouage de finissage, le rouage de finissage 4 est en permanence tendu de par le couple qu'exerce sur lui la source d'énergie 2 et de par sa coopération avec l'échappement 6. Le couple qu'il transmet au mobile de chronographe 24 est donc sans jeu d'engrenage. Il en découle que la précision d'affichage est améliorée même par rapport aux chronographes traditionnels à affichage du temps courant et du temps chronométré sur une seule face.Like any finishing gear, the finishing gear 4 is permanently tensioned by the torque exerted on it by the energy source 2 and by its cooperation with the escapement 6. The torque it transmits to the chronograph wheel set 24 is therefore without gear play. As a result, the display accuracy is improved even compared to traditional chronographs with a display of the current time and the measured time on a single face.

La présente invention présente un intérêt particulier également dans le cas d'une seconde dite indirecte, où l'aiguille des secondes du temps courant est centrée mais entraînée indirectement par le mobile de seconde 18 excentré. Dans ce cas, en effet, l'invention évite le recours à un renvoi supplémentaire hors du rouage de finissage, dans la chaîne cinématique reliant le mobile de seconde à l'aiguille de seconde ou entre le rouage de finissage et le mobile de chronographe.The present invention is also of particular interest in the case of a so-called indirect second, where the current time seconds hand is centered but driven indirectly by the off-center seconds wheel 18. In this case, in fact, the invention avoids the need for an additional return outside the going train, in the kinematic chain connecting the seconds wheel to the seconds hand or between the going train and the chronograph wheel.

La présente invention n'est pas limitée à un mouvement horloger comprenant un mécanisme de chronographe. Elle peut s'appliquer à tout mouvement horloger comprenant un mécanisme, de chronographe, d'animation ou autre, commandé par l'intermédiaire d'un embrayage, dans le but de faire tourner le mécanisme dans le sens contraire du mobile de seconde du rouage de finissage, ou plus généralement du mobile du rouage de finissage qui commande ledit mécanisme, sans augmenter les jeux d'engrenage.The present invention is not limited to a watch movement comprising a chronograph mechanism. It can be applied to any watch movement comprising a mechanism, chronograph, animation or other, controlled by means of a clutch, with the aim of rotating the mechanism in the opposite direction to the second wheel of the finishing train, or more generally to the wheel of the finishing train which controls said mechanism, without increasing the gear play.

Claims (7)

  1. Timepiece movement comprising a power source (2), a finishing going train (4), an escapement (6) connected to the power source (2) by the finishing going train (4), a resonator (8) cooperating with the escapement (6), a driven mobile (24), a coupling lever (36) and a coupling wheel (38) controlled by the coupling lever (36) in order, with the coupling lever (36) in a coupled position, to mesh with the driven mobile (24) in order to transmit the rotation of the finishing going train (4) to the driven mobile (24) and, with the coupling lever (36) in a decoupled position, to be out of contact with the driven mobile (24), characterised in that the coupling wheel (38) forms part of a mobile (18) of the finishing going train (4).
  2. Timepiece movement as claimed in claim 1, characterised in that the shaft (26) of said mobile (18) of the finishing going train (4) is guided in rotation on one side in a fixed part (34) of the timepiece movement and on the other side in the coupling lever (36).
  3. Timepiece movement as claimed in claim 1 or 2, characterised in that said mobile (18) of the finishing going train (4) is a seconds mobile.
  4. Timepiece movement as claimed in claim 3, characterised in that the seconds mobile (18) is eccentric with respect to the timepiece movement.
  5. Timepiece movement as claimed in any one of claims 1 to 4, characterised in that the driven mobile (24) is a chronograph mobile.
  6. Timepiece comprising a timepiece movement as claimed in any one of claims 1 to 5.
  7. Timepiece comprising a timepiece movement as claimed in claims 4 and 5, characterised in that it comprises, on a first face, a seconds display of the current time (10, 20) driven by the seconds mobile (18) and, on a second face opposite to the first face, a chronograph display (14, 22) driven by the chronograph mobile (24).
EP21174717.5A 2021-05-19 2021-05-19 Timepiece movement with clutch Active EP4092491B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21174717.5A EP4092491B1 (en) 2021-05-19 2021-05-19 Timepiece movement with clutch

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Application Number Priority Date Filing Date Title
EP21174717.5A EP4092491B1 (en) 2021-05-19 2021-05-19 Timepiece movement with clutch

Publications (2)

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EP4092491A1 EP4092491A1 (en) 2022-11-23
EP4092491B1 true EP4092491B1 (en) 2025-03-26

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US843887A (en) * 1906-02-19 1907-02-12 Adolph Gerson Stop-watch.
CH57805A (en) * 1911-11-14 1913-02-01 Aurele Donze Double-sided pocket watch
CH623980GA3 (en) * 1979-01-19 1981-07-15 Timepiece with chronograph
CH684769B5 (en) * 1992-03-30 1995-06-30 Technowatch Sa Chronograph.
CH714798B1 (en) * 2018-03-19 2022-03-31 Hublot Sa Geneve Chronograph mechanism for a timepiece.
EP3671370B1 (en) * 2018-12-20 2021-08-04 Patek Philippe SA Genève Clutch device and chronograph mechanism comprising such a clutch device

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