EP2251747B1 - Chronograph mechanism and timepiece provided with such a chronograph mechanism - Google Patents

Chronograph mechanism and timepiece provided with such a chronograph mechanism Download PDF

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Publication number
EP2251747B1
EP2251747B1 EP10003416.4A EP10003416A EP2251747B1 EP 2251747 B1 EP2251747 B1 EP 2251747B1 EP 10003416 A EP10003416 A EP 10003416A EP 2251747 B1 EP2251747 B1 EP 2251747B1
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EP
European Patent Office
Prior art keywords
chronograph
wheel
lever
blocking
blocker
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EP10003416.4A
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German (de)
French (fr)
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EP2251747A2 (en
EP2251747A3 (en
Inventor
Didier Christophe Masuy
Pierre-Maurice Rochat
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Publication of EP2251747A2 publication Critical patent/EP2251747A2/en
Publication of EP2251747A3 publication Critical patent/EP2251747A3/en
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    • 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
    • G04F7/0828—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement acting in the plane of the movement
    • 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
    • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
    • G04F7/0847—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with column wheel

Definitions

  • the present invention relates to chronograph mechanisms of the type comprising a column wheel or a cam and to a timepiece provided with such a chronograph mechanism.
  • the present invention relates to a mechanical timepiece whose movement is provided with a chronograph mechanism comprising rockers and a column wheel or a cam and such a chronograph mechanism.
  • the subject of the present invention is a chronograph mechanism comprising a column wheel or a cam controlling the movements of a clutch rocker provided with a device for particular adjustment of the amplitude of the displacement of this clutch rocker. .
  • This adjustment device determines more particularly the penetration of the toothing of an intermediate wheel, pivoted on the clutch rocker, in the toothing of the chronograph wheel. This penetration of the toothing of the intermediate wheel into the toothing of the chronograph wheel is decisive for the proper operation of the chronograph mechanism.
  • the clutch lever bearing the intermediate wheel is pivoted concentrically to a driving wheel engaged with the intermediate wheel.
  • the intermediate wheel n does not mesh with the chronograph wheel.
  • the toothing of the intermediate wheel engages in the toothing of the chronograph wheel to cause the -this.
  • the degree of penetration of these teeth is unpredictable despite the accuracy of these teeth due to small modules, manufacturing tolerances as well as misery round two wheels.
  • This degree of penetration is determined by the position of an eccentric against which abuts the eccentric clutch lever located between the axis of rotation of the clutch rocker and the tip of this rocker.
  • Such adjustment of the movement of the clutch lever of a chronograph mechanism is known in particular from CH 5821.
  • the licensee has developed a new device for adjusting the penetration of the toothing of the intermediate wheel into the toothing of the chronograph wheel which is more accurate. This device is described in the published European patent application EP 1 947 531 .
  • All these known chronograph mechanisms also have a pivoting blocker and subjected to an elastic return action, it comprises a brake intended to come into contact with the toothing of the chronograph wheel when the chronograph is stopped.
  • This blocker comprises a feeler cooperating with the column wheel or the cam to place said blocker in the active position, blocking the chronograph wheel, or inactive position, releasing the chronograph wheel.
  • the movement of the blocker must be perfectly synchronized with that of the clutch rocker. Synchronization between the clutch rocker and the blocker depends primarily on the manufacturing accuracy of the end of the clutch rocker and the end of the blocker in contact with the column wheel or the cam. Watchmakers need to retouch, file or forge, both ends to make a good synchronization between the clutch and the blocker. This results in an important adjustment time and the intervention of specialists.
  • the watchmaker must also check and synchronize when the chronograph is stopped.
  • the clutch wheel must leave the toothing of the chronograph wheel as late as possible so that the stopper keeps the chronograph wheel in the position of the measured time without this wheel can have a rotational movement.
  • the present invention relates to a chronograph mechanism limiting the intervention of watchmakers for mounting and adjusting the chronograph mechanism and allowing a perfect synchronization by a simple and fast operation avoiding any retouching of parts including the blocker and the rocker clutch, columns of the column wheel or the cam.
  • the invention also relates to a watch movement and a timepiece comprising such a chronograph mechanism.
  • a chronograph mechanism useful for understanding the invention is illustrated, in part, by figures 1 and 2 .
  • This chronograph mechanism comprises in the illustrated example a column wheel 1 controlled in the usual manner and controlling the state of the chronograph is walking or stopping as will be described in what follows.
  • This column wheel can be replaced by a cam or a shuttle.
  • This chronograph mechanism comprises a driving wheel 2 pivoted about an axis O and a clutch rocker 3 also pivoted about the axis O, that is to say concentrically with the driving wheel 2.
  • This clutch lever carries an intermediate wheel 4 pivoted X on this rocker.
  • This intermediate wheel 4 is constantly engaged with the drive wheel 2.
  • the free end of the clutch rocker 3 comprises a spout 5 which cooperates with the columns 6 of the column wheel 1.
  • the present chronograph mechanism further comprises a blocker 11 pivoted y having a first arm carries a locking pad 12 cooperating with the toothing of the chronograph wheel 7.
  • a second arm of this blocker 11 carries at its end an eccentric 13.
  • This eccentric 13 comprises a pivot housed in a fatty friction in a bore of the second arm of the blocker 11 and a head, eccentric relative to this pivot, having a slot to allow the angular positioning of the eccentric 13 with a screwdriver.
  • the clutch rocker comprises an arm or control member 14 whose end face 15 is in contact with the periphery of the head of the eccentric 13.
  • a first return spring 16 acts on the clutch rocker 3 and tends to move the spout 5 of this rocker towards the column wheel 1.
  • a second return spring 17 acts on the blocker 11 and tends to rotate the blocker 11 in a clockwise direction and to apply the blocking pad 12 against the toothing of the chronograph wheel 7.
  • the adjustment of the penetration depth of the toothing of the intermediate wheel 4 in the toothing of the chronograph wheel 7 is for example as described in the patent EP 1 947 531 aforementioned and the synchronization of the blocker 11 is automatic since it is controlled by the clutch lever 3 directly and no longer independently by the column wheel 1.
  • the amplitude of the movement of the blocker 11 and the application force of the blocking pad 12 against the toothing of the chronograph wheel 7 is easily and quickly adjusted using the eccentric 13 and the second return spring 17.
  • the eccentric 13 can be replaced by a pin or stud fixed to the blocker or Even the side edge of the blocker 11.
  • the column wheel can be replaced by a cam.
  • the clutch lever 3 comprises an arm or control member 20 on which is pivoted a blocker 21 at 22 by one of its ends.
  • the free end of this blocker is shaped so as to form a locking shoe 23 intended to cooperate with the toothing of the chronograph wheel 7.
  • This blocker 21 has an oblong opening 24 in which emerges the head of a pivoted eccentric 25 in the control arm.
  • the blocker 21 further comprises a pin 26.
  • a return spring 27 fixed on the control arm 20 of the clutch lever 3 rests on this pin 26 and tends to hold the blocker 21 in abutment against the eccentric 25.
  • the column wheel 6 can be replaced by a cam or a shuttle.
  • eccentric 25 could be replaced by a fixed pin.

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

Description

La présente invention se rapporte aux mécanismes de chronographe du type comportant une roue à colonnes ou une came ainsi qu'à une pièce d'horlogerie munie d'un tel mécanisme de chronographe.The present invention relates to chronograph mechanisms of the type comprising a column wheel or a cam and to a timepiece provided with such a chronograph mechanism.

La présente invention se rapporte à une pièce d'horlogerie mécanique dont le mouvement est muni d'un mécanisme de chronographe comprenant des bascules et une roue à colonnes ou une came ainsi qu'à un tel mécanisme de chronographe.The present invention relates to a mechanical timepiece whose movement is provided with a chronograph mechanism comprising rockers and a column wheel or a cam and such a chronograph mechanism.

Plus particulièrement la présente invention a pour objet un mécanisme de chronographe comportant une roue à colonnes ou une came commandant les déplacements d'une bascule d'embrayage munie d'un dispositif de réglage particulier de l'amplitude du déplacement de cette bascule d'embrayage. Ce dispositif de réglage détermine plus particulièrement la pénétration de la denture d'une roue intermédiaire, pivotée sur la bascule d'embrayage, dans la denture de la roue de chronographe. Cette pénétration de la denture de la roue intermédiaire dans la denture de la roue de chronographe est déterminante pour la bonne marche du mécanisme de chronographe.More particularly, the subject of the present invention is a chronograph mechanism comprising a column wheel or a cam controlling the movements of a clutch rocker provided with a device for particular adjustment of the amplitude of the displacement of this clutch rocker. . This adjustment device determines more particularly the penetration of the toothing of an intermediate wheel, pivoted on the clutch rocker, in the toothing of the chronograph wheel. This penetration of the toothing of the intermediate wheel into the toothing of the chronograph wheel is decisive for the proper operation of the chronograph mechanism.

Dans un mécanisme de chronographe à roue à colonnes ou à came habituel, la bascule d'embrayage portant la roue intermédiaire est pivotée concentriquement à une roue entraîneuse en prise avec la roue intermédiaire. Lorsque le bec, ou extrémité libre, de la bascule d'embrayage est en contact, sous l'effet de son ressort de rappel, avec une des colonnes de la roue à colonnes ou avec une partie haute de la came, la roue intermédiaire n'engrène pas avec la roue de chronographe. Par contre, lorsque le bec de la bascule d'embrayage tombe entre deux colonnes de la roue à colonnes ou sur une partie basse de la came, la denture de la roue intermédiaire s'engage dans la denture de la roue de chronographe pour entraîner celle-ci. Le degré de pénétration de ces dentures est imprévisible malgré la précision de ces dentures du fait de petits modules, des tolérances de fabrication ainsi qu'aux mal ronds des deux roues. Ce degré de pénétration est déterminé par la position d'un excentrique contre lequel vient buter la bascule d'embrayage, excentrique situé entre l'axe de rotation de la bascule d'embrayage et le bec de cette bascule. Un tel réglage du déplacement de la bascule d'embrayage d'un mécanisme de chronographe est connu notamment du document CH 5821.In a conventional column-wheel or cam-type chronograph mechanism, the clutch lever bearing the intermediate wheel is pivoted concentrically to a driving wheel engaged with the intermediate wheel. When the spout, or free end, of the clutch rocker is in contact, under the effect of its return spring, with one of the columns of the column wheel or with an upper part of the cam, the intermediate wheel n does not mesh with the chronograph wheel. On the other hand, when the nose of the clutch rocker falls between two columns of the column wheel or on a lower part of the cam, the toothing of the intermediate wheel engages in the toothing of the chronograph wheel to cause the -this. The degree of penetration of these teeth is unpredictable despite the accuracy of these teeth due to small modules, manufacturing tolerances as well as misery round two wheels. This degree of penetration is determined by the position of an eccentric against which abuts the eccentric clutch lever located between the axis of rotation of the clutch rocker and the tip of this rocker. Such adjustment of the movement of the clutch lever of a chronograph mechanism is known in particular from CH 5821.

La titulaire a développé un nouveau dispositif de réglage de la pénétration de la denture de la roue intermédiaire dans la denture de la roue de chronographe qui est plus précis. Ce dispositif est décrit dans la demande de brevet européen publiée EP 1 947 531 .The licensee has developed a new device for adjusting the penetration of the toothing of the intermediate wheel into the toothing of the chronograph wheel which is more accurate. This device is described in the published European patent application EP 1 947 531 .

Tous ces mécanismes de chronographe connus présentent en outre un bloqueur pivotant et soumis à une action élastique de rappel, il comporte un frein destiné à entrer en contact avec la denture de la roue de chronographe lorsque le chronographe est à l'arrêt. Ce bloqueur comporte un palpeur coopérant avec la roue à colonnes ou la came pour placer ledit bloqueur en position active, bloquant la roue de chronographe, ou en position inactive, libérant la roue de chronographe. Bien entendu le mouvement du bloqueur doit être parfaitement synchronisé avec celui de la bascule d'embrayage. La synchronisation entre la bascule d'embrayage et du bloqueur dépend principalement de la précision de fabrication de l'extrémité de la bascule d'embrayage et de l'extrémité du bloqueur en contact avec la roue à colonnes ou la came. Les horlogers ont besoin de retoucher, limer ou forger, ces deux extrémités pour effectuer une bonne synchronisation entre l'embrayage et le bloqueur. Ceci entraîne un temps de réglage important et l'intervention de spécialistes.All these known chronograph mechanisms also have a pivoting blocker and subjected to an elastic return action, it comprises a brake intended to come into contact with the toothing of the chronograph wheel when the chronograph is stopped. This blocker comprises a feeler cooperating with the column wheel or the cam to place said blocker in the active position, blocking the chronograph wheel, or inactive position, releasing the chronograph wheel. Of course the movement of the blocker must be perfectly synchronized with that of the clutch rocker. Synchronization between the clutch rocker and the blocker depends primarily on the manufacturing accuracy of the end of the clutch rocker and the end of the blocker in contact with the column wheel or the cam. Watchmakers need to retouch, file or forge, both ends to make a good synchronization between the clutch and the blocker. This results in an important adjustment time and the intervention of specialists.

Lors de la mise en fonction du chronographe, le bloqueur ne doit plus être en contact avec la roue de chronographe lorsque la roue d'embrayage pénètre dans la denture de la roue de chronographe. Le réglage de cette synchronisation est un point important dans le bon fonctionnement du chronographe.When turning on the chronograph, the stopper must no longer be in contact with the chronograph wheel when the clutch wheel enters the gearing of the chronograph wheel. The setting of this synchronization is an important point in the proper functioning of the chronograph.

L'horloger doit également contrôler et effectuer la synchronisation lorsque l'on arrête le chronographe. La roue d'embrayage doit quitter la denture de la roue de chronographe le plus tard possible de façon que le bloqueur maintienne la roue de chronographe dans la position du temps mesuré sans que cette roue puisse avoir un mouvement de rotation.The watchmaker must also check and synchronize when the chronograph is stopped. The clutch wheel must leave the toothing of the chronograph wheel as late as possible so that the stopper keeps the chronograph wheel in the position of the measured time without this wheel can have a rotational movement.

Les documents FR 2504700 , CH 177652 , US 278127 et US 2641900 décrivent des mécanismes de chronographe dans lesquels le bloqueur est commandé par la bascule d'embrayage plutôt que directement par la roue à colonnes ou la came.The documents FR 2504700 , CH 177652 , US 278127 and US 2641900 describe chronograph mechanisms in which the blocker is controlled by the clutch rocker rather than directly by the column wheel or the cam.

La présente invention a pour objet un mécanisme de chronographe limitant l'intervention des horlogers pour le montage et le réglage du mécanisme de chronographe et permettant une synchronisation parfaite par une opération simple et rapide évitant toute retouche des pièces et notamment du bloqueur et de la bascule d'embrayage, des colonnes de la roue à colonnes ou de la came.The present invention relates to a chronograph mechanism limiting the intervention of watchmakers for mounting and adjusting the chronograph mechanism and allowing a perfect synchronization by a simple and fast operation avoiding any retouching of parts including the blocker and the rocker clutch, columns of the column wheel or the cam.

Ce mécanisme de chronographe est défini dans la revendication 1.This chronograph mechanism is defined in claim 1.

L'invention a encore pour objet un mouvement d'horlogerie et une pièce d'horlogerie comportant un tel mécanisme de chronographe.The invention also relates to a watch movement and a timepiece comprising such a chronograph mechanism.

Le dessin annexé illustre schématiquement deux exemples de mécanisme de chronographe.

  • La figure 1 est une vue en plan des pièces essentielles d'un mécanisme de chronographe permettant une meilleure synchronisation, sans retouches mécaniques d'aucune pièce du mécanisme, du bloqueur et de la bascule d'embrayage. Cette figure illustre la position des pièces du mécanisme de chronographe lorsque le chronographe est à l'arrêt.
  • La figure 2 est une vue en plan analogue à la figure 1 la position des pièces du mécanisme de chronographe étant celle lorsque le chronographe est en marche.
  • La figure 3 illustre en plan une forme d'exécution du mécanisme de chronographe selon l'invention à l'état de marche.
The accompanying drawing schematically illustrates two examples of chronograph mechanism.
  • The figure 1 is a plan view of essential parts of a chronograph mechanism for better synchronization, without mechanical retouching of any part of the mechanism, the clutch and the clutch rocker. This figure shows the position of the parts of the chronograph mechanism when the chronograph is stopped.
  • The figure 2 is a plan view similar to the figure 1 the position of the parts of the chronograph mechanism being that when the chronograph is running.
  • The figure 3 illustrates in plan an embodiment of the chronograph mechanism according to the invention in the operating state.

Un mécanisme de chronographe utile à la compréhension de l'invention est illustré, en partie, aux figures 1 et 2. Ce mécanisme de chronographe comporte dans l'exemple illustré une roue à colonnes 1 commandée de façon usuelle et contrôlant l'état du chronographe soit la marche ou l'arrêt comme cela va être décrit dans ce qui suit. Cette roue à colonne peut être remplacée par une came ou une navette.A chronograph mechanism useful for understanding the invention is illustrated, in part, by figures 1 and 2 . This chronograph mechanism comprises in the illustrated example a column wheel 1 controlled in the usual manner and controlling the state of the chronograph is walking or stopping as will be described in what follows. This column wheel can be replaced by a cam or a shuttle.

Ce mécanisme de chronographe comporte une roue entraîneuse 2 pivotée autour d'un axe O et une bascule d'embrayage 3 également pivotée autour de l'axe O, c'est à dire concentriquement à la roue entraîneuse 2. Cette bascule d'embrayage porte une roue intermédiaire 4 pivotée en X sur cette bascule. Cette roue intermédiaire 4 est constamment en prise avec la roue entraîneuse 2. L'extrémité libre de la bascule d'embrayage 3 comporte un bec 5 qui coopère avec les colonnes 6 de la roue à colonnes 1. Lorsque le bec 5 de la bascule d'embrayage 3 est en appui sur la périphérie d'une colonne 6 de la roue à colonnes 1, la bascule d'embrayage 3 est pivotée autour de son axe O dans le sens anti-horaire et la roue intermédiaire est désengagée d'une roue de chronographe 7 solidaire d'un axe 8 portant également le coeur des secondes 9, la came de chronographe 10 et l'aiguille des secondes de chronographe (non illustré). Le chronomètre est à l'arrêt et les pièces du mécanisme de chronographe sont disposées comme illustré à la figure 1.This chronograph mechanism comprises a driving wheel 2 pivoted about an axis O and a clutch rocker 3 also pivoted about the axis O, that is to say concentrically with the driving wheel 2. This clutch lever carries an intermediate wheel 4 pivoted X on this rocker. This intermediate wheel 4 is constantly engaged with the drive wheel 2. The free end of the clutch rocker 3 comprises a spout 5 which cooperates with the columns 6 of the column wheel 1. When the spout 5 of the rocker d clutch 3 is supported on the periphery of a column 6 of the column wheel 1, the clutch rocker 3 is pivoted about its axis O in the counterclockwise direction and the intermediate wheel is disengaged from a wheel Chronograph 7 secured to an axis 8 also bearing the heart of the seconds 9, the chronograph cam 10 and the chronograph second hand (not shown). The stopwatch is stopped and the parts of the chronograph mechanism are arranged as shown in figure 1 .

Par contre lorsque le bec 5 de la bascule d'embrayage 3 est situé entre deux colonnes 6 de la roue à colonnes 1 (figure 2) la bascule d'embrayage 3 se déplace dans le sens horaire autour de son axe O et la roue intermédiaire 4 engrène avec la roue de chronographe 7.On the other hand, when the spout 5 of the clutch rocker 3 is situated between two columns 6 of the column wheel 1 ( figure 2 ) the clutch rocker 3 moves clockwise about its axis O and the intermediate wheel 4 meshes with the chronograph wheel 7.

Le présent mécanisme de chronographe comporte encore un bloqueur 11 pivoté en y dont un premier bras porte un patin de blocage 12 coopérant avec la denture de la roue de chronographe 7. Un second bras de ce bloqueur 11 porte à son extrémité un excentrique 13. Cet excentrique 13 comporte un pivot logé à frottement gras dans un perçage du second bras du bloqueur 11 et une tête, excentrée par rapport à ce pivot, comportant une fente pour permettre le positionnement angulaire de l'excentrique 13 à l'aide d'un tournevis.The present chronograph mechanism further comprises a blocker 11 pivoted y having a first arm carries a locking pad 12 cooperating with the toothing of the chronograph wheel 7. A second arm of this blocker 11 carries at its end an eccentric 13. This eccentric 13 comprises a pivot housed in a fatty friction in a bore of the second arm of the blocker 11 and a head, eccentric relative to this pivot, having a slot to allow the angular positioning of the eccentric 13 with a screwdriver.

La bascule d'embrayage comporte un bras ou organe de commande 14 dont la face terminale 15 est en contact avec la périphérie de la tête de l'excentrique 13.The clutch rocker comprises an arm or control member 14 whose end face 15 is in contact with the periphery of the head of the eccentric 13.

Un premier ressort de rappel 16 agit sur la bascule d'embrayage 3 et tend à déplacer le bec 5 de cette bascule en direction de la roue à colonnes 1. Un second ressort de rappel 17 agit sur le bloqueur 11 et tend à faire pivoter le bloqueur 11 dans le sens horaire et à appliquer le patin de blocage 12 contre la denture de la roue de chronographe 7.A first return spring 16 acts on the clutch rocker 3 and tends to move the spout 5 of this rocker towards the column wheel 1. A second return spring 17 acts on the blocker 11 and tends to rotate the blocker 11 in a clockwise direction and to apply the blocking pad 12 against the toothing of the chronograph wheel 7.

Grâce à ce mécanisme les déplacements du bloqueur 11 ne sont plus comme dans les chronographes existant commandés directement par la roue à colonnes 1 indépendamment de la bascule d'embrayage 3. En effet les mouvements du bloqueur 11 sont directement commandés par la bascule d'embrayage 3 par la face 15 de son organe de commande 14 agissant sur l'excentrique 13 porté par le second bras du bloqueur 11.Thanks to this mechanism the movements of the blocker 11 are no longer as in the existing chronographs directly controlled by the column wheel 1 independently of the clutch rocker 3. Indeed the movements of the blocker 11 are directly controlled by the clutch rocker 3 by the face 15 of its control member 14 acting on the eccentric 13 carried by the second arm of the blocker 11.

Dans ce mécanisme le réglage de la profondeur de pénétration de la denture de la roue intermédiaire 4 dans la denture de la roue de chronographe 7 se fait par exemple comme décrit dans le brevet EP 1 947 531 précité et la synchronisation du bloqueur 11 est automatique puisqu'il est commandé par la bascule d'embrayage 3 directement et non plus de façon indépendante par la roue à colonnes 1. L'amplitude du déplacement du bloqueur 11 et la force d'application du patin de blocage 12 contre la denture de la roue de chronographe 7 se règle facilement et rapidement à l'aide de l'excentrique 13 et du second ressort de rappel 17.In this mechanism the adjustment of the penetration depth of the toothing of the intermediate wheel 4 in the toothing of the chronograph wheel 7 is for example as described in the patent EP 1 947 531 aforementioned and the synchronization of the blocker 11 is automatic since it is controlled by the clutch lever 3 directly and no longer independently by the column wheel 1. The amplitude of the movement of the blocker 11 and the application force of the blocking pad 12 against the toothing of the chronograph wheel 7 is easily and quickly adjusted using the eccentric 13 and the second return spring 17.

Dans des variantes d'exécution, si la tolérance de fabrication et de montage du bloqueur 11 et de la bascule d'embrayage 3 sont suffisamment faibles, l'excentrique 13 peut être remplacé par une goupille ou plot fixé sur le bloqueur ou même la tranche latérale du bloqueur 11. Dans des variantes de ce mécanisme la roue à colonnes peut être remplacée par une came.In alternative embodiments, if the manufacturing and mounting tolerance of the blocker 11 and the clutch lever 3 are sufficiently small, the eccentric 13 can be replaced by a pin or stud fixed to the blocker or Even the side edge of the blocker 11. In variants of this mechanism the column wheel can be replaced by a cam.

Dans une forme d'exécution du mécanisme de chronographe selon l'invention, illustrée à la figure 3, la bascule d'embrayage 3 comporte un bras ou organe de commande 20 sur lequel est pivoté un bloqueur 21 en 22 par l'une de ses extrémités. L'extrémité libre de ce bloqueur est conformée de manière à former un patin de blocage 23 destiné à coopérer avec la denture de la roue de chronographe 7. Ce bloqueur 21 comporte une ouverture oblongue 24 dans laquelle émerge la tête d'un excentrique 25 pivoté dans le bras de commande. Le bloqueur 21 comporte encore une goupille 26. Un ressort de rappel 27 fixé sur le bras de commande 20 de la bascule d'embrayage 3 s'appuie sur cette goupille 26 et tend à maintenir le bloqueur 21 en appui contre l'excentrique 25.In one embodiment of the chronograph mechanism according to the invention, illustrated in FIG. figure 3 , the clutch lever 3 comprises an arm or control member 20 on which is pivoted a blocker 21 at 22 by one of its ends. The free end of this blocker is shaped so as to form a locking shoe 23 intended to cooperate with the toothing of the chronograph wheel 7. This blocker 21 has an oblong opening 24 in which emerges the head of a pivoted eccentric 25 in the control arm. The blocker 21 further comprises a pin 26. A return spring 27 fixed on the control arm 20 of the clutch lever 3 rests on this pin 26 and tends to hold the blocker 21 in abutment against the eccentric 25.

Dans la position illustrée à la figure 3 le bec 5 de la bascule d'embrayage est tombé entre deux colonnes de la roue à colonnes 6, la bascule d'embrayage 3 s'est déplacée dans le sens du mouvement des aiguilles d'une montre autour de son axe O et son excentrique 25 entre en contact avec la tranche interne de l'ouverture oblongue 24 du bloqueur pour le faire pivoter également dans le sens des aiguilles d'une montre autour de son axe 22 éloignant ainsi le patin de blocage 23 de la denture de la roue de chronographe qui est libérée.In the position illustrated in figure 3 the spout 5 of the clutch rocker fell between two columns of the column wheel 6, the clutch rocker 3 moved in the direction of movement of the clockwise around its axis O and its eccentric 25 contacts the inner slice of the oblong aperture 24 of the blocker to also rotate it clockwise about its axis 22 thus moving the blocking shoe 23 away from the toothing of the chronograph wheel who is released.

Lorsque le bec 5 de la bascule d'embrayage 3 se trouve sur une colonne de la roue à colonnes 6, elle pivote dans le sens contraire des aiguilles d'une montre autour de son axe O, la roue intermédiaire 4 se dégage de la roue de chronographe 7, le bloqueur 21 entre en contact par son patin de blocage 23, avec la denture de la roue de chronographe et est appliqué contre celle-ci par son ressort de rappel. L'excentrique 25 permet de régler simplement le moment où le patin de blocage 23 entre en contact avec la roue de chronographe lors de la rotation anti-horaire de la bascule d'embrayage 3.When the spout 5 of the clutch rocker 3 is on a column of the column wheel 6, it pivots counterclockwise about its axis O, the intermediate wheel 4 disengages from the wheel Chronograph 7, the blocker 21 comes into contact with its blocking shoe 23, with the gear of the chronograph wheel and is applied against it by its return spring. The eccentric 25 makes it possible to simply adjust the moment when the blocking pad 23 comes into contact with the chronograph wheel during the counterclockwise rotation of the clutch rocker 3.

Dans cette forme du mécanisme de chronographe également la roue à colonnes 6 peut être remplacée par une came ou une navette.In this form of the chronograph mechanism also the column wheel 6 can be replaced by a cam or a shuttle.

Dans une variante de cette forme d'exécution l'excentrique 25 pourrait être remplacé par une goupille fixe.In a variant of this embodiment the eccentric 25 could be replaced by a fixed pin.

Ainsi, grâce à ce mécanisme de chronographe le réglage de la synchronisation du bloqueur 11 ;21 et de la bascule d'embrayage 3 est grandement facilité et peut être beaucoup plus précis. La synchronisation des mouvements de la bascule d'embrayage 3 et du bloqueur 11;21 devient une fonction effectuée en direct, de façon automatique et sans pièces intermédiaires ou par l'intermédiaire d'un simple excentrique 13; 25.Thus, with this chronograph mechanism the adjustment of the synchronization of the blocker 11; 21 and the clutch rocker 3 is greatly facilitated and can be much more accurate. The synchronization of the movements of the clutch lever 3 and the blocker 11; 21 becomes a function performed directly, automatically and without intermediate parts or by means of a simple eccentric 13; 25.

Claims (5)

  1. Chronograph mechanism comprising a drive wheel (2), a coupling lever (3) pivoted concentrically with the drive wheel and the free end of which bears a beak (5), this coupling lever bearing an intermediate wheel (4) constantly in engagement with the drive wheel (2) and intended to be in or out of engagement with the toothing of a chronograph wheel (7) depending on the position of the coupling lever (3) and a pivotably mounted blocking lever (21) comprising a blocking shoe (23) cooperating with the toothing of the chronograph wheel (7), the blocking lever (21) and the coupling lever (3) being subject to return springs (16, 27), characterised in that the coupling lever (3) comprises a control member (25) against which the blocking lever (21) bears under the action of the return spring (27) of the blocking lever (21) and in that the blocking lever (21) is pivoted by one end on the coupling lever (3).
  2. Mechanism as claimed in claim 1, characterised in that the blocking lever (21) has an oblong hole (24) in which a pin fixed in the coupling lever is engaged; the return spring (27) of the blocking lever being fixed on this coupling lever (3) and acting on a pin (26) of the blocking lever (21).
  3. Mechanism as claimed in claim 1, characterised in that the blocking lever (21) has an oblong hole (24) in which the head of an eccentric (25) pivoted in the coupling lever (3) is engaged; the return spring of the blocking lever (21) being fixed on the coupling lever (3) and acting on a pin (26) of the blocking lever (21).
  4. Timepiece movement comprising a chronograph mechanism as claimed in any one of claims 1 to 3.
  5. Timepiece comprising a chronograph mechanism as claimed in any one of claims 1 to 3.
EP10003416.4A 2009-05-12 2010-03-30 Chronograph mechanism and timepiece provided with such a chronograph mechanism Active EP2251747B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00740/09A CH700983B1 (en) 2009-05-12 2009-05-12 chronograph mechanism and timepiece equipped with such a chronograph mechanism.

Publications (3)

Publication Number Publication Date
EP2251747A2 EP2251747A2 (en) 2010-11-17
EP2251747A3 EP2251747A3 (en) 2016-12-07
EP2251747B1 true EP2251747B1 (en) 2018-01-31

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ID=42676645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10003416.4A Active EP2251747B1 (en) 2009-05-12 2010-03-30 Chronograph mechanism and timepiece provided with such a chronograph mechanism

Country Status (2)

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EP (1) EP2251747B1 (en)
CH (1) CH700983B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704666A2 (en) * 2011-03-18 2012-09-28 Patek Philippe Sa Geneve chronograph mechanism and timepiece provided with such a mechanism.
EP3324249A1 (en) 2016-11-17 2018-05-23 Nogerah SA Clutch system for chronograph
CH715924B1 (en) * 2019-03-14 2022-09-15 Lvmh Swiss Mft Sa C/O Zenith Succursale De Lvmh Swiss Mft Sa Lateral clutch device for chronograph with tooth alignment eccentric and chronograph watch movement comprising such a device.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US278127A (en) * 1883-05-22 William got
CH5821A (en) * 1892-11-04 1893-03-31 Lugrin Henry Alfred Improvement in chronograph mechanisms
CH177652A (en) * 1934-11-06 1935-06-15 Depraz Marcel Chronograph timepiece.
US2641900A (en) * 1951-01-10 1953-06-16 Jeanneret & Co R Timepiece with chronograph
FR2504700B1 (en) * 1981-04-23 1985-07-05 Dodane Precia Gete Montres CONTROL SYSTEM FOR A ROTATING DRIVE WHEEL OF A CHRONOGRAPH NEEDLE
US6913933B2 (en) 2001-12-03 2005-07-05 Ortho-Clinical Diagnostics, Inc. Fluid dispensing algorithm for a variable speed pump driven metering system
EP1948531B1 (en) 2005-08-29 2011-03-09 Venture Design Works Limited Apparatus and methods for multi-fluid dispensing systems
CH703809B1 (en) * 2007-01-22 2012-03-30 Patek Philippe Sa Geneve wheel chronograph mechanism and column timepiece provided with such a mechanism.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2251747A2 (en) 2010-11-17
CH700983B1 (en) 2014-03-14
EP2251747A3 (en) 2016-12-07
CH700983A2 (en) 2010-11-15

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