EP1296205A1 - Chronograph mechanism - Google Patents

Chronograph mechanism Download PDF

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Publication number
EP1296205A1
EP1296205A1 EP01810930A EP01810930A EP1296205A1 EP 1296205 A1 EP1296205 A1 EP 1296205A1 EP 01810930 A EP01810930 A EP 01810930A EP 01810930 A EP01810930 A EP 01810930A EP 1296205 A1 EP1296205 A1 EP 1296205A1
Authority
EP
European Patent Office
Prior art keywords
clutch
wheel
lever
positions
rocker
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.)
Withdrawn
Application number
EP01810930A
Other languages
German (de)
French (fr)
Inventor
Johnny Girardin
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.)
Girard Perregaux SA
Original Assignee
Girard Perregaux SA
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.)
Filing date
Publication date
Application filed by Girard Perregaux SA filed Critical Girard Perregaux SA
Priority to EP01810930A priority Critical patent/EP1296205A1/en
Priority to EP02758029A priority patent/EP1430367B1/en
Priority to DE60226256T priority patent/DE60226256T2/en
Priority to US10/490,615 priority patent/US6926438B2/en
Priority to JP2003531261A priority patent/JP4235106B2/en
Priority to PCT/CH2002/000487 priority patent/WO2003027778A2/en
Publication of EP1296205A1 publication Critical patent/EP1296205A1/en
Withdrawn legal-status Critical Current

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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
    • G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
    • G04B43/002—Component shock protection arrangements
    • 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

Definitions

  • a mechanism of this type is, for example, described in the theory book of watchmaking from Chs-A. Reymondin et al., Page 232 (Federation of Schools Techniques de Canal, 1998, ISBN 2-940025-10-X).
  • the cam is a column wheel.
  • the clutch member and a rocker bearing a clutch wheel intended to kinematically connect the gear train of finishing of the watch, which runs continuously, with the cog of chronograph, which runs only on demand.
  • the wheel clutch is engaged or out of engagement depending on whether the rocker occupies its first position or its second position.
  • the tip of the rocker is provided with a stopper nose which, in cooperation with the columns of the column wheel, depending on whether it is in gaze of a void or that it rests on a full of the column wheel, defines the first and second positions, under the effect of the rocker spring.
  • the present invention implements means for overcome the disadvantage exposed above.
  • the mechanism is characterized in that the control lever has a lock and the clutch member is provided with a crampon cooperating with the lock when the clutch wheel occupies its first position, all in such a way that the rocker is prevented from moving shock when the clutch wheel is engaged with the cog chronograph.
  • control member comprises a hook secured to the lever.
  • control and a stopper nose arranged to cooperate respectively with the ratchet and with the columns of the column wheel.
  • the hook is arranged so that the lock released the clamp before a column cooperates with the nose.
  • the lever control, the ratchet, the latch and the crampon are arranged so as to that, when the clutch wheel is in its first position, the lever control cooperates with the rocker by means of the lock which is resting against the crampon.
  • the chronograph mechanism according to the invention is further characterized in that the sum of the thicknesses of the bolt and the stud is less than or equal to the length of the arc described by the end of the clutch lever between the positions it occupies when the clutch wheel is in its first or second position.
  • the rocker 16 pivots at its end opposite to that comprising the nose 18 on an eccentric secured to the plate 10, not shown because it is located outside the drawing field.
  • the scale 16 is subjected to a couple of positioning by a rocker spring also arranged outside the drawing field. In the position shown in Figure 1, it is in support against an eccentric 31, the nose 18 being engaged between two columns 40.
  • the control lever 26 pivots on a tenon, and is held in place by a screw 32 fixed in a tapped hole in the post.
  • One of its ends door, pivotally mounted, the control hook 28, while the other end is arranged, in a conventional manner, to cooperate with the push button of ordered. This possible pivoting of the hook 28, combined with the pressure of the hook spring 30, maintaining it in a position allowing it to cooperate with the column wheel 24.
  • the control lever 26 carries a pin 33.
  • an arm 34 is fixed on the upper face of the control lever 26 by means of a screw 35 engaged in a hole made in its middle part.
  • a screw 35 engaged in a hole made in its middle part.
  • One of its ends is provided with a lock 36 arranged to cooperate with the spike 20.
  • the other end forms a stop 37, which comes to bear against the pin 33.
  • Column wheel 24 is made in one piece and consists of a Breguet teeth forming a ratchet 38 and 40 columns arranged perpendicular and concentric to the teeth, the angular pitch columns being twice that of the Breguet teeth. She is positioned by the jumper spring 25 engaged on the Breguet toothing of the ratchet 38. It governs the interaction between the control and clutch devices.
  • the nose 18 of the rocker is engaged in one of the spaces between the columns 40.
  • the wheel clutch 14 is, thus, in its first position and drives the mobile chronograph 22.
  • the latch 36 spans the crampon 20.
  • the length of the arm 26, as well as the shape of the crampon 20 and the latch 36 are chosen so that the arm 34 comes to bear on the rocker 16 by means of the blanks of the crampon 20 and of the latch 36.
  • the arm 34 being integral with the control lever 26, which is positioned by the spring 30, it follows that the lock 36 and the stud 20 are in contact intimate with each other and lock the rocker 16 in its position where the wheel 14 is engaged with the wheel 22, even if a shock tends to move it.
  • control hook 28 and the ratchet 38 do not exactly coincide, the parts having a play two together. More precisely, the control lever 26 must pivot by an angle ⁇ 1 so that the hook 28 traverses the lost path existing between it and the ratchet 38, then by an angle ⁇ 2 so that the column wheel 24 rotates until that a column, identified by the letter a , comes into contact with the nose 18. To ensure optimal operation, the lever 16 must not be set in motion until after the latch 36 has released the clamp 20.
  • the mechanism thus described operates in the following manner.
  • a pressure exerted on the push button rotates the lever 26 clockwise and, with it, the arm 34 and the control hook 28.
  • the hook 28 takes the game of the lost path, then it drives the column wheel 24 until the column 40a comes into contact with the nose 18, lever 26 thus traversing the angle ⁇ .
  • the lock 36, part of the arm 34 is lifts and moves away from the clamp 20, thereby releasing the movement of the rocker clutch 16.
  • the column 40a in contact with the nose 18, raises it, thereby pivoting the clutch lever 16 so that the wheel clutch 14 emerges from the chronograph mobile 22.
  • Column 40a thus acts on the nose 18 of the clutch lever 16 to rotate it in the space left free by the lock 36.
  • the lever begins by taking the game of the lost path, then drives the column wheel 24 with a step of the Breguet teeth, such so that the nose 18 leaves the support of the column 40a and falls into space between two columns.
  • the lever 26 is in a position such that the latch 36 is outside the space traversed by the crampon 20.
  • the clutch lever 16 can therefore pivot freely up to what it meets the eccentric 31, the nose 18 being thus engaged again between two columns 40.

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

Abstract

The lever (26) includes a catch (36) engaging a component (16) with a projection (20), with the clutch wheel (14) in a first position. This prevents clutch displacement as the result of mechanical shock, when the clutch wheel is engaged with the chronograph mechanism.

Description

La présente invention se rapporte aux mécanismes de chronographe, du type comportant:

  • un rouage de chronographe destiné à porter au moins une aiguille pour l'affichage d'un temps chronométré,
  • un rouage de finissage,
  • une roue d'embrayage susceptible d'occuper deux positions et destinée à relier le rouage de chronographe au rouage de finissage dans l'une de ces positions,
  • une bascule d'embrayage munie d'une butée et destinée à assurer le déplacement de la roue d'embrayage, entre sa première position dans laquelle le mécanisme est en fonction, et sa deuxième position dans laquelle le mécanisme est hors fonction,
  • un organe d'embrayage destiné à assurer le déplacement de la roue d'embrayage, entre sa première position dans laquelle le mécanisme est en fonction, et sa deuxième position dans laquelle le mécanisme est hors fonction,
  • une came destinée à coopérer avec l'organe d'embrayage pour définir les première et deuxième positions de la roue d'embrayage,
  • un levier de commande muni d'un organe de commande actionnant la came et, par elle, l'organe d'embrayage pour faire passer la roue d'embrayage de l'une à l'autre position,
The present invention relates to chronograph mechanisms, of the type comprising:
  • a chronograph train for carrying at least one hand for displaying a timed time,
  • a gear train,
  • a clutch wheel capable of occupying two positions and intended to connect the chronograph train to the finishing train in one of these positions,
  • a clutch lever provided with a stopper and intended to ensure the displacement of the clutch wheel, between its first position in which the mechanism is in operation, and its second position in which the mechanism is inoperative,
  • a clutch member intended to ensure the displacement of the clutch wheel, between its first position in which the mechanism is in operation, and its second position in which the mechanism is inoperative,
  • a cam intended to cooperate with the clutch member to define the first and second positions of the clutch wheel,
  • a control lever provided with a control member actuating the cam and, by it, the clutch member for passing the clutch wheel from one to the other position,

Un mécanisme de ce type est, par exemple, décrit dans le livre de théorie d'horlogerie de Chs-A. Reymondin et al., page 232 (Fédération des Ecoles Techniques de Suisse, 1998, ISBN 2-940025-10-X). Dans ce mécanisme, la came est une roue à colonnes. L'organe d'embrayage et une bascule portant une roue d'embrayage destinée à relier cinématiquement le rouage de finissage de la montre, qui tourne en permanence, avec le rouage de chronographe, qui ne tourne qu'à la demande. Plus précisément, la roue d'embrayage est en prise ou hors prise selon que la bascule occupe sa première position ou sa deuxième position. A mechanism of this type is, for example, described in the theory book of watchmaking from Chs-A. Reymondin et al., Page 232 (Federation of Schools Techniques de Suisse, 1998, ISBN 2-940025-10-X). In this mechanism, the cam is a column wheel. The clutch member and a rocker bearing a clutch wheel intended to kinematically connect the gear train of finishing of the watch, which runs continuously, with the cog of chronograph, which runs only on demand. Specifically, the wheel clutch is engaged or out of engagement depending on whether the rocker occupies its first position or its second position.

L'extrémité de la bascule est munie d'un nez formant butée et qui, en coopération avec les colonnes de la roue à colonnes, selon qu'il se trouve en regard d'un vide ou qu'il s'appuie sur un plein de la roue à colonnes, définit les première et deuxième positions, sous l'effet du ressort de bascule.The tip of the rocker is provided with a stopper nose which, in cooperation with the columns of the column wheel, depending on whether it is in gaze of a void or that it rests on a full of the column wheel, defines the first and second positions, under the effect of the rocker spring.

Malgré les ressorts d'appuis chargés de maintenir les différents organes en place pendant leur fonctionnement, il arrive qu'au cours d'une mesure, le mécanisme étant dans sa première position, un mouvement brutal du porteur ou un choc violent provoque un saut de la bascule d'embrayage. L'entraínement du rouage de chronographe est alors interrompu un instant, ce qui fausse la mesure. La présente invention met en oeuvre des moyens pour pallier l'inconvénient exposé ci-dessus.Despite the support springs responsible for maintaining the various organs in place during their operation, it happens that during a measurement, the mechanism being in its first position, a brutal movement of the wearer or a violent shock causes a jump of the clutch lever. The training of the chronograph train is then interrupted for an instant, this which distorts the measurement. The present invention implements means for overcome the disadvantage exposed above.

A cet effet, le mécanisme est caractérisé en ce que le levier de commande comporte un verrou et l'organe d'embrayage est muni d'un crampon coopérant avec le verrou lorsque la roue d'embrayage occupe sa première position, le tout de manière à ce que la bascule soit empêchée de se déplacer sous l'effet d'un choc lorsque la roue d'embrayage est en prise avec le rouage de chronographe.To this end, the mechanism is characterized in that the control lever has a lock and the clutch member is provided with a crampon cooperating with the lock when the clutch wheel occupies its first position, all in such a way that the rocker is prevented from moving shock when the clutch wheel is engaged with the cog chronograph.

De façon avantageuse, l'organe d'embrayage est une bascule munie d'une butée coopérant avec la came, et la came est une roue à colonnes qui comporte :

  • une denture Breguet formant un rochet, et
  • des colonnes disposées perpendiculairement et de façon concentrique à la denture.
Advantageously, the clutch member is a rocker provided with a stop cooperating with the cam, and the cam is a column wheel which comprises:
  • Breguet teeth forming a ratchet, and
  • columns arranged perpendicularly and concentrically to the teeth.

De plus, l'organe de commande comporte un crochet solidaire du levier de commande et un nez formant butée agencés pour coopérer respectivement avec le rochet et avec les colonnes de la roue à colonnes.In addition, the control member comprises a hook secured to the lever. control and a stopper nose arranged to cooperate respectively with the ratchet and with the columns of the column wheel.

Afin d'assurer des conditions de travail optimales, le crochet est disposé de manière à ce que le verrou ait libéré le crampon avant qu'une colonne ne coopère avec le nez. To ensure optimal working conditions, the hook is arranged so that the lock released the clamp before a column cooperates with the nose.

II est aussi intéressant que, dans le mécanisme et selon l'invention, le levier de commande, le rochet, le verrou et le crampon soient agencés de manière à ce que, lorsque la roue d'embrayage est dans sa première position, le levier de commande coopère avec la bascule par l'intermédiaire du verrou qui est en appui contre le crampon.It is also interesting that, in the mechanism and according to the invention, the lever control, the ratchet, the latch and the crampon are arranged so as to that, when the clutch wheel is in its first position, the lever control cooperates with the rocker by means of the lock which is resting against the crampon.

Le mécanisme de chronographe selon l'invention est encore caractérisé en ce que la somme des épaisseurs du verrou et du crampon est inférieure ou égale à la longueur de l'arc décrit par l'extrémité de la bascule d'embrayage entre les positions qu'elle occupe lorsque la roue d'embrayage se trouve dans sa première ou sa deuxième position.The chronograph mechanism according to the invention is further characterized in that the sum of the thicknesses of the bolt and the stud is less than or equal to the length of the arc described by the end of the clutch lever between the positions it occupies when the clutch wheel is in its first or second position.

L'invention sera mieux comprise à la lecture de la description qui suit, faite en regard des dessins annexés sur lesquels les figures 1 et 2 sont des vues de dessus d'un mouvement de montre muni d'un mécanisme de chronographe respectivement en position embrayée et en position débrayée.The invention will be better understood on reading the description which follows, made in look of the accompanying drawings in which Figures 1 and 2 are views of above a watch movement fitted with a chronograph mechanism respectively in the engaged position and in the disengaged position.

Le mouvement représenté au dessin comporte une platine 10 qui porte les éléments essentiels du mécanisme de chronographe soit un dispositif d'embrayage comportant:

  • une roue entraíneuse de chronographe 12 solidaire en rotation du mobile de secondes du rouage de finissage de la montre, qui se trouve du côté de la platine 10 opposé à celui représenté au dessin,
  • une roue d'embrayage 14 en prise avec la roue entraíneuse 12, et susceptible d'occuper deux positions,
  • une bascule d'embrayage montée pivotante sur la platine, portant la roue d'embrayage 14 et munie, à l'une de ses extrémités, d'un nez 18 formant butée et destiné à définir les positions de la roue d'embrayage, et d'un crampon 20 assurant un verrouillage de la bascule 16, comme cela sera expliqué plus loin, et
  • un mobile de chronographe 22 placé au centre du mouvement et en prise ou non avec la roue d'embrayage 14, selon que la roue 14 occupe sa première ou sa deuxième position, et un dispositif de commande du dispositif d'embrayage, qui comprend :
  • une roue à colonnes 24, coopérant avec le nez 18 de la bascule 16 pour la positionner,
  • un ressort-sautoir 25 de roue à colonnes définissant les positions stables de cette dernière,
  • un levier de commande 26, monté pivotant sur le bâti, commandé par un poussoir non représenté au dessin et solidaire de la boíte de la montre,
  • un crochet de commande 28 monté pivotant sur le levier de commande et agencé pour coopérer avec la roue à colonnes 24, comme cela sera expliqué plus loin,
  • et un ressort de crochet 30 fixé sur la platine 10 et maintenant en appui le crochet 28 contre la roue à colonnes 24, tout en assurant le retour du levier 26 dans sa position de repos.
The movement shown in the drawing comprises a plate 10 which carries the essential elements of the chronograph mechanism, namely a clutch device comprising:
  • a chronograph driving wheel 12 integral in rotation with the seconds mobile of the finishing train of the watch, which is located on the side of the plate 10 opposite to that shown in the drawing,
  • a clutch wheel 14 engaged with the driving wheel 12, and capable of occupying two positions,
  • a clutch lever pivotally mounted on the plate, carrying the clutch wheel 14 and provided, at one of its ends, with a nose 18 forming a stopper and intended to define the positions of the clutch wheel, and a crampon 20 ensuring a locking of the rocker 16, as will be explained below, and
  • a chronograph mobile 22 placed in the center of the movement and whether or not engaged with the clutch wheel 14, depending on whether the wheel 14 occupies its first or second position, and a clutch device control device, which comprises:
  • a column wheel 24, cooperating with the nose 18 of the lever 16 to position it,
  • a jumper spring 25 of column wheel defining the stable positions of the latter,
  • a control lever 26, pivotally mounted on the frame, controlled by a pusher not shown in the drawing and secured to the watch case,
  • a control hook 28 pivotally mounted on the control lever and arranged to cooperate with the column wheel 24, as will be explained below,
  • and a hook spring 30 fixed on the plate 10 and now resting the hook 28 against the column wheel 24, while ensuring the return of the lever 26 to its rest position.

Dans ce mouvement, le rouage de finissage tourne en permanence et met en action la roue d'embrayage 14 par la roue entraíneuse 12. La roue 14 est ou non en prise avec le mobile 22 selon qu'elle occupe sa première ou sa deuxième position. Ainsi, lorsque la bascule 16 occupe la position représentée sur la figure 1, le chronographe est en fonction, alors qu'il est hors fonction dans la position illustrée sur la figure 2.In this movement, the gear train rotates continuously and puts in action the clutch wheel 14 by the driving wheel 12. The wheel 14 is or not engaged with the mobile 22 depending on whether it occupies its first or its second position. Thus, when the rocker 16 occupies the position shown in Figure 1, the chronograph is on, while it is off in the position illustrated in Figure 2.

La bascule 16 pivote à son extrémité opposée à celle comportant le nez 18 sur un excentrique solidaire de la platine 10, non représenté car se trouvant en dehors du champ du dessin. La bascule 16 est soumise à un couple de positionnement par un ressort de bascule également disposé en dehors du champ du dessin. Dans la position représentée à la figure 1, elle est en appui contre un excentrique 31, le nez 18 étant engagé entre deux colonnes 40.The rocker 16 pivots at its end opposite to that comprising the nose 18 on an eccentric secured to the plate 10, not shown because it is located outside the drawing field. The scale 16 is subjected to a couple of positioning by a rocker spring also arranged outside the drawing field. In the position shown in Figure 1, it is in support against an eccentric 31, the nose 18 being engaged between two columns 40.

Le levier de commande 26 pivote sur un tenon, et est maintenu en place par une vis 32 fixée dans un trou taraudé dans le tenon. L'une de ses extrémités porte, monté pivotant, le crochet de commande 28, alors que l'autre extrémité est agencée, de manière classique, pour coopérer avec le bouton-poussoir de commande. Ce pivotement possible du crochet 28, conjugué à la pression du ressort de crochet 30, le maintien dans une position lui permettant de coopérer avec la roue à colonnes 24. Le levier de commande 26 porte une goupille 33.The control lever 26 pivots on a tenon, and is held in place by a screw 32 fixed in a tapped hole in the post. One of its ends door, pivotally mounted, the control hook 28, while the other end is arranged, in a conventional manner, to cooperate with the push button of ordered. This possible pivoting of the hook 28, combined with the pressure of the hook spring 30, maintaining it in a position allowing it to cooperate with the column wheel 24. The control lever 26 carries a pin 33.

Selon une caractéristique importante de l'invention, un bras 34 est fixé sur la face supérieure du levier de commande 26 au moyen d'une vis 35 engagée dans un trou pratiqué dans sa partie médiane. Une de ses extrémités est munie d'un verrou 36 agencé pour coopérer avec le crampon 20. L'autre extrémité forme une butée 37, qui vient prendre appui contre la goupille 33. Lors du réglage du mécanisme de chronographe, la vis 35 étant desserrée, le bras 34 est appuyé par le verrou 36 contre le crampon 20 et par la butée 37 contre la goupille 33. La vis peut ensuite être serrée, le bras étant alors parfaitement réglé.According to an important characteristic of the invention, an arm 34 is fixed on the upper face of the control lever 26 by means of a screw 35 engaged in a hole made in its middle part. One of its ends is provided with a lock 36 arranged to cooperate with the spike 20. The other end forms a stop 37, which comes to bear against the pin 33. When adjusting the chronograph mechanism, the screw 35 being loosened, the arm 34 is supported by latch 36 against crampon 20 and by stop 37 against pin 33. The screw can then be tightened, the arm then being perfectly adjusted.

La roue à colonnes 24 est fabriquée en une pièce et se compose d'une denture Breguet formant un rochet 38 et de colonnes 40 disposées perpendiculairement et de façon concentrique à la denture, le pas angulaire des colonnes étant le double de celui de la denture Breguet. Elle est positionnée par le ressort-sautoir 25 engagé sur la denture Breguet du rochet 38. Elle régit l'interaction entre les dispositifs de commande et d'embrayage.Column wheel 24 is made in one piece and consists of a Breguet teeth forming a ratchet 38 and 40 columns arranged perpendicular and concentric to the teeth, the angular pitch columns being twice that of the Breguet teeth. She is positioned by the jumper spring 25 engaged on the Breguet toothing of the ratchet 38. It governs the interaction between the control and clutch devices.

En position embrayée, comme le montre la figure 1, le nez 18 de la bascule est engagé dans un des espaces compris entre les colonnes 40. La roue d'embrayage 14 est, ainsi, dans sa première position et entraíne le mobile de chronographe 22. Dans cette position, le verrou 36 enjambe le crampon 20. La longueur du bras 26, ainsi que la forme du crampon 20 et du verrou 36 sont choisies de manière à ce que le bras 34 vienne prendre appui sur la bascule 16 par l'intermédiaire des flans du crampon 20 et du verrou 36. Le bras 34 étant solidaire du levier de commande 26, lequel est positionné par le ressort 30, il en résulte que le verrou 36 et le crampon 20 sont en contact intime l'un avec l'autre et bloquent la bascule 16 dans sa position où la roue 14 est en prise avec la roue 22, même si un choc tend à la déplacer. In the engaged position, as shown in FIG. 1, the nose 18 of the rocker is engaged in one of the spaces between the columns 40. The wheel clutch 14 is, thus, in its first position and drives the mobile chronograph 22. In this position, the latch 36 spans the crampon 20. The length of the arm 26, as well as the shape of the crampon 20 and the latch 36 are chosen so that the arm 34 comes to bear on the rocker 16 by means of the blanks of the crampon 20 and of the latch 36. The arm 34 being integral with the control lever 26, which is positioned by the spring 30, it follows that the lock 36 and the stud 20 are in contact intimate with each other and lock the rocker 16 in its position where the wheel 14 is engaged with the wheel 22, even if a shock tends to move it.

Le crochet de commande 28 et le rochet 38, d'une part, le nez 18 de la bascule d'embrayage 16 et l'espace entre deux colonnes 40, d'autre part, ne coïncident pas exactement, les pièces présentant un jeu deux à deux. Plus précisément, le levier de commande 26 doit pivoter d'un angle α1 pour que le crochet 28 parcoure le chemin perdu existant entre lui et le rochet 38, puis d'un angle α2 pour que la roue à colonnes 24 tourne jusqu'à ce qu'une colonne, identifiée par la lettre a, entre en contact avec le nez 18. Pour assurer un fonctionnement optimal, il est nécessaire que la bascule 16 ne soit mise en mouvement qu'après que le verrou 36 ait libéré le crampon 20. Cette condition est remplie lorsque l'angle α = α1 + α2 est supérieur à β, angle dont doit pivoter le levier de commande 26 pour que le verrou 36 libère totalement le crampon 20. De plus, la somme des épaisseurs du verrou 36 et du crampon 20 doit être inférieure ou égale à la longueur de l'arc décrit par le nez 18 de la bascule d'embrayage 16 entre les positions qu'il occupe selon qu'il est en appui contre une colonne 40 ou engagé dans un espace compris entre deux colonnes 40.The control hook 28 and the ratchet 38, on the one hand, the nose 18 of the clutch lever 16 and the space between two columns 40, on the other hand, do not exactly coincide, the parts having a play two together. More precisely, the control lever 26 must pivot by an angle α1 so that the hook 28 traverses the lost path existing between it and the ratchet 38, then by an angle α2 so that the column wheel 24 rotates until that a column, identified by the letter a , comes into contact with the nose 18. To ensure optimal operation, the lever 16 must not be set in motion until after the latch 36 has released the clamp 20. This condition is fulfilled when the angle α = α1 + α2 is greater than β, the angle which the control lever 26 must pivot so that the latch 36 fully releases the lug 20. In addition, the sum of the thicknesses of the latch 36 and the crampon 20 must be less than or equal to the length of the arc described by the nose 18 of the clutch lever 16 between the positions it occupies depending on whether it is in abutment against a column 40 or engaged in a space included between two columns 40.

Le mécanisme ainsi décrit fonctionne de la manière suivante. Une pression exercée sur le bouton-poussoir fait pivoter le levier 26 dans le sens horaire et, avec lui, le bras 34 et le crochet de commande 28. Dans un premier temps, le crochet 28 prend le jeu du chemin perdu, puis il entraíne la roue à colonnes 24 jusqu'à ce que la colonne 40a entre en contact avec le nez 18, levier 26 parcourant ainsi l'angle α. Durant ce temps le verrou 36, partie du bras 34, se soulève et s'écarte du crampon 20, libérant ainsi le mouvement de la bascule d'embrayage 16.The mechanism thus described operates in the following manner. A pressure exerted on the push button rotates the lever 26 clockwise and, with it, the arm 34 and the control hook 28. First, the hook 28 takes the game of the lost path, then it drives the column wheel 24 until the column 40a comes into contact with the nose 18, lever 26 thus traversing the angle α. During this time the lock 36, part of the arm 34, is lifts and moves away from the clamp 20, thereby releasing the movement of the rocker clutch 16.

Dans un second temps, la colonne 40a, au contact du nez 18, le soulève, faisant ainsi pivoter la bascule d'embrayage 16 de telle sorte que la roue d'embrayage 14 se dégage du mobile de chronographe 22. La colonne 40a agit ainsi sur le nez 18 de la bascule d'embrayage 16 pour la faire pivoter dans l'espace laissé libre par le verrou 36. Lorsque le levier 26 a atteint le bout de sa course, c'est à dire lorsque le crochet de commande 28 a entraíné la roue à colonnes 22 d'un pas de la denture Breguet, la roue à colonnes 24 se trouve dans une position telle que la colonne 40a maintient la bascule 16 de façon à ce que la roue14 soit débrayée de la roue 22.Secondly, the column 40a, in contact with the nose 18, raises it, thereby pivoting the clutch lever 16 so that the wheel clutch 14 emerges from the chronograph mobile 22. Column 40a thus acts on the nose 18 of the clutch lever 16 to rotate it in the space left free by the lock 36. When the lever 26 has reached the end of its travel, that is to say when the control hook 28 has driven the column wheel 22 with a step of the Breguet teeth, the column wheel 24 is in a position such that the column 40a maintains the rocker 16 so that the wheel 14 is disengaged from the wheel 22.

Lorsque l'on relâche le bouton-poussoir, le levier de commande 26 reprend sa position initiale sous l'effet du ressort sautoir 30, le crochet de commande 28 sautant sur une dent du rochet 38 alors que le verrou 36 passe de l'autre côté du crampon 24. Le nez 18 de la bascule d'embrayage reste en appui sur la colonne 40a, définissant la deuxième position de la roue d'embrayage 14 dans laquelle le mobile de chronographe n'est plus entraíné.When the push button is released, the control lever 26 resumes its initial position under the effect of the jumper spring 30, the control hook 28 jumping on a ratchet tooth 38 as the latch 36 passes to the other side of the crampon 24. The nose 18 of the clutch lever remains in contact with the column 40a, defining the second position of the clutch wheel 14 in which the chronograph mobile is no longer trained.

Une nouvelle pression sur le bouton-poussoir fait pivoter le levier 26 et, avec lui, le verrou 36 et le crochet de commande 28. Comme dans le mouvement décrit précédemment, le levier commence par prendre le jeu du chemin perdu, puis entraíne la roue à colonnes 24 d'un pas de la denture Breguet, de telle sorte que le nez 18 quitte l'appui de la colonne 40a et tombe dans l'espace compris entre deux colonnes. A ce moment-là, le levier 26 se trouve dans une position telle que le verrou 36 se trouve en dehors de l'espace parcouru par le crampon 20. La bascule d'embrayage 16 peut donc pivoter librement jusqu'à ce qu'elle rencontre l'excentrique 31, le nez 18 étant ainsi à nouveau engagé entre deux colonnes 40.Pressing the push button again pivots lever 26 and, with him, the lock 36 and the control hook 28. As in the movement described previously, the lever begins by taking the game of the lost path, then drives the column wheel 24 with a step of the Breguet teeth, such so that the nose 18 leaves the support of the column 40a and falls into space between two columns. At this time, the lever 26 is in a position such that the latch 36 is outside the space traversed by the crampon 20. The clutch lever 16 can therefore pivot freely up to what it meets the eccentric 31, the nose 18 being thus engaged again between two columns 40.

Lorsque l'on relâche le bouton-poussoir, le levier de commande 26 reprend sa position initiale, telle que représentée sur la figure 1, le crochet de commande 28 sautant une dent du rochet 38 en reculant et le verrou 36 enjambant le crampon 20. La bascule 22 a ainsi retrouvé sa première position, dans laquelle la roue d'embrayage 14 est en prise avec le mobile d'embrayage 22.When the push button is released, the control lever 26 resumes its initial position, as shown in figure 1, the control hook 28 jumping a tooth from the ratchet 38 backing up and the bolt 36 spanning the crampon 20. The flip-flop 22 has thus returned to its first position, in which the clutch wheel 14 is in engagement with the clutch mobile 22.

Ainsi est réalisé un système de verrouillage de chronographe qui, par la coopération d'un verrou solidaire du levier de commande et d'un crampon surmontant la bascule d'embrayage, empêche la bascule 16 de quitter sa position d'embrayage de façon intempestive. La sécurité de fonctionnement est ainsi sensiblement améliorée.Thus is produced a chronograph locking system which, by the cooperation of a lock secured to the control lever and a crampon overcoming the clutch lever, prevents lever 16 from leaving its clutch position inadvertently. Operational safety is thus significantly improved.

L'ensemble qui vient d'être décrit constitue la commande assurant l'embrayage et le débrayage du rouage de chronographe. Il est bien évident que ce mécanisme comporte, en outre, des moyens de mise à zéro du rouage de chronographe, partiellement représentés au dessin, mais qui ne seront pas décrits, car étant bien connus de l'homme du métier et sans rapport avec la présente invention.The assembly which has just been described constitutes the command ensuring the engagement and disengagement of the chronograph train. It is quite obvious that this mechanism further comprises means for zeroing the gear train chronograph, partially shown in the drawing, but which will not be described, because being well known to those skilled in the art and unrelated to the present invention.

La portée de l'invention ne se limite pas au cas particulier qui vient d'être décrit. L'homme de métier peut de façon évidente adapter l'invention à d'autres mécanismes de chronographe, par exemple, avec une came d'un autre type qu'une roue à colonnes ou avec un embrayage axial.The scope of the invention is not limited to the particular case which has just been described. Those skilled in the art can obviously adapt the invention to other chronograph mechanisms, for example, with a cam of a other than a column wheel or with an axial clutch.

Claims (7)

Mécanisme de chronographe du type comportant un rouage de chronographe (22) destiné à porter au moins une aiguille pour l'affichage d'un temps chronométré, un rouage de finissage, une roue d'embrayage (14) susceptible d'occuper deux positions et destinée à relier le rouage de chronographe au rouage de finissage dans l'une de ces positions, un organe d'embrayage (16) destiné à assurer le déplacement de la roue d'embrayage, entre sa première position dans laquelle le mécanisme est en fonction, et sa deuxième position dans laquelle le mécanisme est hors fonction, une came (24) destinée à coopérer avec l'organe d'embrayage (16) pour définir les première et deuxième positions de la roue d'embrayage (14), un levier de commande (26) muni d'un organe de commande (28) actionnant la came (24) et, par elle, l'organe d'embrayage (16) pour faire passer la roue d'embrayage de l'une à l'autre position, caractérisé en ce que ledit levier (26) comporte un verrou (36) et l'organe d'embrayage (16) est muni d'un crampon (20) coopérant avec ledit verrou lorsque la roue d'embrayage (14) occupe sa première position, le tout de manière à ce que l'organe d'embrayage (16) soit empêché de se déplacer sous l'effet d'un choc lorsque la roue d'embrayage est en prise avec le rouage de chronographe.Chronograph mechanism of the type comprising a chronograph train (22) intended to carry at least one hand for displaying a timed time, a gear train, a clutch wheel (14) capable of occupying two positions and intended to connect the chronograph train to the finishing train in one of these positions, a clutch member (16) intended to ensure the displacement of the clutch wheel, between its first position in which the mechanism is in operation, and its second position in which the mechanism is inoperative, a cam (24) intended to cooperate with the clutch member (16) to define the first and second positions of the clutch wheel (14), a control lever (26) provided with a control member (28) actuating the cam (24) and, through it, the clutch member (16) for passing the clutch wheel from one to the other position, characterized in that said lever (26) comprises a lock (36) and the clutch member (16) is provided with a crampon (20) cooperating with said lock when the clutch wheel (14) occupies its first position, all so that the clutch member (16) is prevented from moving under the effect of a shock when the clutch wheel is engaged with the chronograph train. Mécanisme selon la revendication 1 caractérisé en ce que ledit organe d'embrayage est formé d'une bascule (16) munie d'une butée (18) agencée de manière à coopérer avec ladite came (22) pour commander le déplacement de la roue d'embrayage de l'une à l'autre desdites positions. Mechanism according to claim 1 characterized in that said clutch member is formed of a rocker (16) provided with a stop (18) arranged so as to cooperate with said cam (22) to control the movement of the wheel d 'clutch from one to the other of said positions. Mécanisme selon la revendication 3, caractérisé en ce que la came (24) est une roue à colonnes, qui comporte: une denture Breguet formant un rochet (38) et des colonnes (40) disposées perpendiculairement et de façon concentrique à la denture, et en ce que ledit organe de commande est un crochet (28) coopérant avec le rochet (38).Mechanism according to claim 3, characterized in that the cam (24) is a column wheel, which comprises: Breguet teeth forming a ratchet (38) and columns (40) arranged perpendicular and concentric to the teeth, and in that said control member is a hook (28) cooperating with the ratchet (38). Mécanisme selon la revendication 3, caractérisé en ce que la butée est formée d'un nez (18) agencé pour coopérer avec les colonnes (40) de la roue à colonnes (24).Mechanism according to claim 3, characterized in that the stop is formed by a nose (18) arranged to cooperate with the columns (40) of the column wheel (24). Mécanisme selon la revendication 4, caractérisé en ce que le crochet (28) est disposé de manière à ce qu'une colonne (40) ne coopère avec ledit nez (18) qu'après que le verrou (36) ait libéré le crampon (20).Mechanism according to claim 4, characterized in that the hook (28) is arranged so that a column (40) does not cooperate with said nose (18) until after the latch (36) has released the clamp ( 20). Mécanisme selon l'une des revendications 2 à 5, caractérisé en ce que le levier de commande (26) et la bascule (16) sont agencés de manière à ce que, lorsque ladite roue d'embrayage (22) est dans sa première position, le levier de commande (26) coopère avec la bascule (16) par l'intermédiaire du verrou (34) qui est en appui contre le crampon (24).Mechanism according to one of claims 2 to 5, characterized in that the control lever (26) and the rocker (16) are arranged so that, when said clutch wheel (22) is in its first position , the control lever (26) cooperates with the rocker (16) by means of the lock (34) which is in abutment against the crampon (24). Mécanisme selon l'une des revendications 2 à 6, caractérisé en ce que la somme des épaisseurs du verrou (36) et du crampon (24) est inférieure ou égale à la longueur de l'arc décrit par l'extrémité de la bascule d'embrayage (16) entre les positions qu'elle occupe lorsque la roue d'embrayage se trouve dans sa première ou sa deuxième position.Mechanism according to one of claims 2 to 6, characterized in that the sum of the thicknesses of the latch (36) and the crampon (24) is less than or equal to the length of the arc described by the end of the rocker d 'clutch (16) between the positions it occupies when the clutch wheel is in its first or second position.
EP01810930A 2001-09-24 2001-09-24 Chronograph mechanism Withdrawn EP1296205A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP01810930A EP1296205A1 (en) 2001-09-24 2001-09-24 Chronograph mechanism
EP02758029A EP1430367B1 (en) 2001-09-24 2002-09-06 Chronograph mechanism
DE60226256T DE60226256T2 (en) 2001-09-24 2002-09-06 CHRONOGRAPH MECHANISM
US10/490,615 US6926438B2 (en) 2001-09-24 2002-09-06 Chronograph mechanism
JP2003531261A JP4235106B2 (en) 2001-09-24 2002-09-06 Chronograph mechanism
PCT/CH2002/000487 WO2003027778A2 (en) 2001-09-24 2002-09-06 Chronograph mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01810930A EP1296205A1 (en) 2001-09-24 2001-09-24 Chronograph mechanism

Publications (1)

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EP1296205A1 true EP1296205A1 (en) 2003-03-26

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EP01810930A Withdrawn EP1296205A1 (en) 2001-09-24 2001-09-24 Chronograph mechanism
EP02758029A Expired - Lifetime EP1430367B1 (en) 2001-09-24 2002-09-06 Chronograph mechanism

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US (1) US6926438B2 (en)
EP (2) EP1296205A1 (en)
JP (1) JP4235106B2 (en)
DE (1) DE60226256T2 (en)
WO (1) WO2003027778A2 (en)

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EP1947531A3 (en) * 2007-01-22 2011-05-25 Patek Philippe SA Genève Device for adjusting the amplitude of movement of the coupling lever of a chronograph with column wheel
EP2602675A1 (en) * 2011-12-08 2013-06-12 ETA SA Manufacture Horlogère Suisse Timepiece movement comprising a chronograph mechanism with column wheel
EP2945029A1 (en) * 2014-05-15 2015-11-18 Patek Philippe SA Genève Chronograph locking device (Device for a clock piece)

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EP1373988B1 (en) * 2001-03-21 2012-05-09 Glashütter Uhrenbetrieb GmbH Device for adjusting a time indicator
JP2004294278A (en) * 2003-03-27 2004-10-21 Seiko Instruments Inc Chronograph timepiece having chronograph train wheel disposed on chronograph unit
US7597471B2 (en) * 2005-11-24 2009-10-06 Vaucher Manufacture Fleurier S.A. Time piece chronograph clockwork movement

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GB2266791A (en) * 1992-05-08 1993-11-10 George Daniels Improvements relaating to chronographs
DE19852347A1 (en) * 1998-11-13 2000-05-25 Lange Uhren Gmbh Minute counter for clock or chronograph; has protrusion on minute-incrementing lever that can be adjusted in peripheral direction of ramped radial cam curve on triggering worm
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Publication number Priority date Publication date Assignee Title
EP1947531A3 (en) * 2007-01-22 2011-05-25 Patek Philippe SA Genève Device for adjusting the amplitude of movement of the coupling lever of a chronograph with column wheel
EP2602675A1 (en) * 2011-12-08 2013-06-12 ETA SA Manufacture Horlogère Suisse Timepiece movement comprising a chronograph mechanism with column wheel
US8882338B2 (en) 2011-12-08 2014-11-11 Eta Sa Manufacture Horlogere Suisse Chronograph mechanism with a column wheel and timepiece movement including the same
EP2945029A1 (en) * 2014-05-15 2015-11-18 Patek Philippe SA Genève Chronograph locking device (Device for a clock piece)
WO2015173372A3 (en) * 2014-05-15 2016-01-14 Patek Philippe Sa Geneve Device for a timepiece
US10496039B2 (en) 2014-05-15 2019-12-03 Patek Philippe Sa Geneve Device for a timepiece

Also Published As

Publication number Publication date
EP1430367A2 (en) 2004-06-23
EP1430367B1 (en) 2008-04-23
WO2003027778A2 (en) 2003-04-03
JP4235106B2 (en) 2009-03-11
DE60226256T2 (en) 2009-05-07
US6926438B2 (en) 2005-08-09
DE60226256D1 (en) 2008-06-05
WO2003027778A3 (en) 2003-07-10
JP2005504299A (en) 2005-02-10
US20040246820A1 (en) 2004-12-09

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