EP2080069B1 - Timepiece provided with a chronograph mechanism - Google Patents

Timepiece provided with a chronograph mechanism Download PDF

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Publication number
EP2080069B1
EP2080069B1 EP07816201A EP07816201A EP2080069B1 EP 2080069 B1 EP2080069 B1 EP 2080069B1 EP 07816201 A EP07816201 A EP 07816201A EP 07816201 A EP07816201 A EP 07816201A EP 2080069 B1 EP2080069 B1 EP 2080069B1
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EP
European Patent Office
Prior art keywords
wheel unit
mesh
wheel
output
retrograde
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EP07816201A
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German (de)
French (fr)
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EP2080069A1 (en
Inventor
Carlos Dias
Grégory Bruttin
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Manufacture Roger Dubuis SA
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Manufacture Roger Dubuis SA
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Priority to EP07816201A priority Critical patent/EP2080069B1/en
Publication of EP2080069A1 publication Critical patent/EP2080069A1/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
    • 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
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • G04F7/0814—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with double hammer, i.e. one hammer acts on two counters
    • 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
    • G04F7/0866—Special arrangements

Definitions

  • the present invention relates to a timepiece equipped with a chronograph mechanism comprising a motor cylinder, an exhaust controlled finishing gear, a retrograde minute counter, an hour counter and means for selective control. manual start and stop said counters.
  • the hour counter of a chronograph mechanism generally comprises a clutch device for selectively engaging it, directly or indirectly, with the barrel, under the control of the column wheel.
  • This counter must also include a reset device also controlled by the column wheel. Therefore, the addition of this hour counter increases the complexity of the assembly and requires many adjustment for its development.
  • the document CH61025 describes a chronograph watch incorporating the features of the preamble of appended claim 1.
  • the object of the present invention is to overcome, at least in part, the aforementioned drawbacks.
  • this invention relates to a timepiece provided with a chronograph mechanism according to claim 1.
  • the figure 2 illustrates the known part of the chronograph mechanism with a minute counter, which comprises, in this example, a column wheel 1, with a control rocker 2 intended to be driven by a pusher (not shown) acting on its end 2a, while its other end has a drive pawl 2b engaged with a pinion 1a provided with a ratchet toothing, integral with the column wheel 1.
  • a mechanism of column wheel chronograph which can be replaced by a cam mechanism of known type to control the same functions.
  • the column wheel 1 controls in particular a clutch lever 3 of the chronograph mechanism as well as the reset hammers 4a, 4b of a mobile 5 of the seconds counter and a mobile 6 of the minute counter, positioned by 9.
  • This whole part of the chronograph mechanism is absolutely classical and is described briefly for reminder and to allow to have a vision of the whole of this mechanism, even if the invention relates essentially to the mechanism of hours counter.
  • the wheel 5 of the seconds counter is engaged with the seconds wheel 10 of the timepiece by a clutch wheel 11 integral with the clutch rocker 3.
  • This wheel 5 of the seconds counter carries a finger 5a for driving one step at each turn the wheel 6 of the minute counter via a reference 8.
  • 12a input is pivotally mounted on the plate P of the frame by means of a ball bearing 15.
  • This input mobile 12a carries two satellites 12b each of which has two teeth, one meshing with a solar mobile 12c solidarity a shaft 12d pivotally mounted in bearings integral with the frame, the other meshing with a pinion 12e secured to the second output mobile 12f, the first output mobile 12g being secured to the shaft 12d.
  • a spring 16 formed by a spiral spring has one end fixed to the shaft 12d and another end fixed to the frame BA.
  • the first output gear 12g of the planetary gear is engaged on the one hand with a wheel 17 carrying the hour meter needle 17a and on the other hand with a wheel 18 in engagement with an actuator member.
  • positioning 19 pivotally mounted on the shaft of the wheel 18.
  • This positioning member 19 comprises a pin 19a engaged in an arcuate opening of circle 18a concentric with the axis of pivoting of the wheel 18, as well as a toothing 19b engaged with a jumper 20.
  • Two brakes or stop members 21a, 21b are pivotally mounted around a common shaft 21c, one of the brakes 21a being freely mounted on this shaft and the other 21c being secured to the shaft 21c.
  • the front part of the upper stop member 21a is pressed towards the first output wheel 12g by a spring 22 and the front portion of the lower stop member 21b is pressed towards the second output wheel 12f by a spring 23.
  • the rear parts of the stop members 21a, 21b are pressed by their respective springs 22, 23 against two respective cams 24a, 24b keyed on a common shaft 24c, integral with a pinion 24d which meshes with a pinion 1b integral with the column wheel 1.
  • the brake or stop member 21a has a projection 21a 'which lies in the path of a portion 19c of the positioning member 19.
  • the mobile 6 of the minute counter carries two cams, a reset cam 6a and a spiral cam 6b for the retrograde return of the indicator needle 25a integral with the wheel 25 of the minute counter ( figures 1 , 4 ).
  • the wheel 25 meshes with a wheel 26 whose pinion 26a is engaged with a toothed sector 27a located at one end of a rocker 27.
  • the other end of this rocker 27 has a feeler 27b which is held in position. contact with the cam 6b thanks to the torque exerted on the wheel 26 by a return spring 28.
  • the wheel 26 of the wheel of the minute counter carries a control finger 26b which intersects the trajectory of a portion 19d of the positioning member 19.
  • the differential 12 is in direct contact with the center wheel 13 of the work train, this differential is driven continuously, whether the chronograph is running or not.
  • the starting and stopping of the chronograph is carried out in the usual way using the control rocker 2 ( figure 2 ) whose pawl 2b drives the ratchet pinion of the column wheel 1 at each pitch to control the various functions of the chronograph.
  • the brakes 21a, 21b are sequentially controlled as follows: When the chronograph mechanism is not in operation, the upper stop brake 21a presses against the first output wheel 12g and is separated from the second output wheel 12f, allowing it to turn in the vacuum, which is necessary otherwise the finishing gear would stop.
  • the respective positions of the two stop brakes 21a, 21b are reversed again so that the brake 21a stops the first output wheel 12g and releases the second output wheel 12f.
  • the two brakes 21a, 21b simultaneously release the two output wheels 12g, 12f allowing the return spring 16 to disarm by reducing the hours counter to zero, so that in this case, the output wheel 12g operates simultaneously as input wheel by which the energy accumulated in the return spring between and spring.
  • the planet gear 12 therefore comprises two input mobiles 12a, 12g and two output mobiles 12f, 12g, the latter being able to fulfill both functions, so that this planetary gear operates according to the principle of a gear differential.
  • This return to zero of the hour counter can occur in two cases, during a voluntary return using the column wheel 1 which corresponds to the reset, or when the hour counter arrives at the end of its measurement capacity which corresponds to the return to zero.
  • the reset is caused by a drive of the column wheel 1 by the ratchet 2a of the control lever 2, following the control of the stopping of the chronograph, which has the effect of the usual resetting of the seconds counters 5 and minutes 6 using the hammers 4a, 4b ( figure 1 ).
  • the cam 24a ( Figures 1, 3 ) in kinematic connection with the column wheel 1 raises the stop brake 21a, 21b, allowing the return spring 16 to bring the first output wheel 12g of the sun gear into the rest position.
  • This position is defined by the opening in an arc 18a of the wheel 18 meshing with the first output wheel 12g of the planetary gear, the displacement of which is limited by the pin 19a of the positioning member 19, itself same positioned by the jumper 20 engaged in its teeth 19b, in the position represented by the figure 2 .
  • this return to zero position can be defined by a fixed stop 30 secured to the frame against which the positioning member 19 abuts.
  • the figure 5 represents the respective positions of the wheel 18, the positioning member 19 and the control finger 26b integral with the wheel 26.
  • This control finger 26b performs an oscillating movement every 30 minutes, which consists of a displacement in the direction counter-clockwise for 30 minutes followed by a sharp reverse in the position illustrated by the figure 1 .
  • the wheel 18 and the positioning member 19 are in the position illustrated by the figure 8 .
  • these same organs are in the position illustrated by the figure 5 , that is to say that the opening in an arc 18a of the wheel 18 has moved from one end to the other relative to the pin 19a of the positioning member 19, which has remained motionless.
  • the wheel 18 continues to be driven in the opposite direction to that of the clockwise and drives the positioning member 19 using the pin 19a of the latter abuts against the opening in an arc 18a, moving the toothed sector 19b of a tooth relative to the jumper 20, as illustrated by the figure 6 .
  • this displacement of the organ of positioning brings its end 19d in the path described by the oscillating finger 26b secured to the wheel 26.
  • the hour meter according to the present invention does not include any reset hammer and no clutch device, the differential being constantly driven in the same way as the finishing gear of the timepiece, the stop brakes 21a, 21b for selectively and alternatively stopping the output wheels 12g, 12f to start or stop the chronograph mechanism, the zeroing being obtained by the release of the output wheels 12g, 12f, the return or reset position being defined by the positioning member as described in detail above.

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

Abstract

The time-piece has a chronograph mechanism including an hour counter with a planetary gear (12) that includes a power-off mobile connected with a finishing gear train and bearing satellite gears engaging a solar mobile. An output mobile capable of displacing between two end positions, is connected to the solar mobile, and is connected to an hour-counting wheel while another output mobile is connected to the gears. Air brakes (21a, 21b) are kinetically connected with a column gear for selectively stopping the output mobiles, and a return spring returns the latter mobile to one of the positions.

Description

La présente invention se rapporte à une pièce d'horlogerie munie d'un mécanisme de chronographe comprenant un barillet moteur, un rouage de finissage contrôlé par un échappement, un compteur de minutes rétrograde, un compteur d'heures et des moyens pour la commande sélective manuelle de la mise en marche et de l'arrêt desdits compteurs.The present invention relates to a timepiece equipped with a chronograph mechanism comprising a motor cylinder, an exhaust controlled finishing gear, a retrograde minute counter, an hour counter and means for selective control. manual start and stop said counters.

Le compteur d'heures d'un mécanisme de chronographe comporte généralement un dispositif d'embrayage pour le mettre sélectivement en prise, directement ou indirectement, avec le barillet, sous la commande de la roue à colonnes. Ce compteur doit aussi comporter un dispositif de remise à zéro également commandé par la roue à colonnes. De ce fait, l'adjonction de ce compteur d'heures augmente la complexité du montage et nécessite de nombreux réglage pour sa mise au point.The hour counter of a chronograph mechanism generally comprises a clutch device for selectively engaging it, directly or indirectly, with the barrel, under the control of the column wheel. This counter must also include a reset device also controlled by the column wheel. Therefore, the addition of this hour counter increases the complexity of the assembly and requires many adjustment for its development.

Le document CH61025 décrit une montre chronographe comportant les caractéristiques du préambule de la revendication 1 annexée.The document CH61025 describes a chronograph watch incorporating the features of the preamble of appended claim 1.

Le but de la présente invention est de remédier, au moins en partie aux inconvénients susmentionnés.The object of the present invention is to overcome, at least in part, the aforementioned drawbacks.

A cet effet, cette invention a pour objet une pièce d'horlogerie munie d'un mécanisme de chronographe selon la revendication 1.For this purpose, this invention relates to a timepiece provided with a chronograph mechanism according to claim 1.

Les avantages du compteur d'heures qui constitue l'élément novateur de la pièce d'horlogerie munie d'un mécanisme de chronographe objet de l'invention, résident dans le fait qu'il ne présente plus ni dispositif d'embrayage, ni dispositif de remise à zéro à marteau agissant sur une came. De ce fait, ce mécanisme ne comporte plus que des roues, supprimant ainsi les délicates opérations de réglage nécessaires avec les compteurs d'heures habituels.The advantages of the hour counter which constitutes the innovative element of the timepiece provided with a chronograph mechanism which is the subject of the invention reside in the fact that it no longer has any clutch device or device. hammer reset acting on a cam. As a result, this mechanism has only wheels, thus eliminating the delicate adjustment operations necessary with the usual hours counters.

Les dessins annexés illustrent, schématiquement et à titre d'exemple, une forme d'exécution du mécanisme de chronographe objet de l'invention.

  • La figure 1 est une vue en plan partielle, côté cadran, de la pièce d'horlogerie;
  • la figure 2 est une vue en plan partielle, côté ponts, de la pièce d'horlogerie;
  • la figure 3 est une vue en coupe selon la ligne III-III de la figure 6;
  • la figure 4 est une vue en coupe selon la ligne IV-IV de la figure 5;
  • les figures 5 à 8 sont des vues en plan partielles de la figure 2 montrant les différentes positions du compteur d'heures lors du retour à zéro qui s'effectue lorsque ce compteur arrive à la fin de sa capacité de comptage.
The accompanying drawings illustrate, schematically and by way of example, an embodiment of the chronograph mechanism object of the invention.
  • The figure 1 is a partial plan view, on the dial side, of the timepiece;
  • the figure 2 is a partial plan view, on the bridge side, of the timepiece;
  • the figure 3 is a sectional view along line III-III of the figure 6 ;
  • the figure 4 is a sectional view along line IV-IV of the figure 5 ;
  • the Figures 5 to 8 are partial plan views of the figure 2 showing the different positions of the hour counter during the return to zero which occurs when this counter reaches the end of its counting capacity.

Le mécanisme proprement dit, rouage de finissage et échappement de cette pièce d'horlogerie ne sont pas représentés ni décrits de manière complète étant donné qu'il s'agit d'éléments bien connus de l'homme de l'art et qu'ils ne sont pas nécessaires pour comprendre la présente invention.The actual mechanism, finishing gear and exhaust of this timepiece are not represented or fully described since these are elements well known to those skilled in the art and they are not necessary to understand the present invention.

La figure 2 illustre la partie connue du mécanisme de chronographe avec un compteur de minutes, qui comporte, dans cet exemple, une roue à colonnes 1, avec une bascule de commande 2 destinée à être entraînée par un poussoir (non représenté) agissant sur son extrémité 2a, alors que son autre extrémité présente un cliquet d'entraînement 2b en prise avec un pignon 1a muni d'une denture à rochet, solidaire de la roue à colonnes 1. Il est précisé que l'invention n'est pas limitée à un mécanisme de chronographe à roue à colonnes, celle-ci pouvant être remplacée par un mécanisme à came de type connu pour commander les mêmes fonctions. La roue à colonnes 1 commande notamment une bascule d'embrayage 3 du mécanisme de chronographe ainsi que les marteaux de remise à zéro 4a, 4b d'un mobile 5 du compteur de secondes et d'un mobile 6 du compteur de minutes, positionné par un sautoir 9. Toute cette partie du mécanisme de chronographe est absolument classique et n'est décrite succinctement que pour rappel et pour permettre d'avoir une vision de l'ensemble de ce mécanisme, même si l'invention se rapporte essentiellement au mécanisme de compteur d'heures.The figure 2 illustrates the known part of the chronograph mechanism with a minute counter, which comprises, in this example, a column wheel 1, with a control rocker 2 intended to be driven by a pusher (not shown) acting on its end 2a, while its other end has a drive pawl 2b engaged with a pinion 1a provided with a ratchet toothing, integral with the column wheel 1. It is specified that the invention is not limited to a mechanism of column wheel chronograph, which can be replaced by a cam mechanism of known type to control the same functions. The column wheel 1 controls in particular a clutch lever 3 of the chronograph mechanism as well as the reset hammers 4a, 4b of a mobile 5 of the seconds counter and a mobile 6 of the minute counter, positioned by 9. This whole part of the chronograph mechanism is absolutely classical and is described briefly for reminder and to allow to have a vision of the whole of this mechanism, even if the invention relates essentially to the mechanism of hours counter.

La roue 5 du compteur de secondes est mise en prise avec la roue de secondes 10 de la pièce d'horlogerie par une roue d'embrayage 11 solidaire de la bascule d'embrayage 3. Cette roue 5 du compteur de secondes porte un doigt 5a pour entraîner d'un pas à chaque tour la roue 6 du compteur de minutes par l'intermédiaire d'un renvoi 8.The wheel 5 of the seconds counter is engaged with the seconds wheel 10 of the timepiece by a clutch wheel 11 integral with the clutch rocker 3. This wheel 5 of the seconds counter carries a finger 5a for driving one step at each turn the wheel 6 of the minute counter via a reference 8.

Nous allons maintenant décrire plus spécialement le compteur d'heures à l'aide des figures 1, 3 et 4. Celui-ci comporte essentiellement un engrenage planétaire 12 comportant un mobile d'entrée 12a engrenant avec le pignon de la roue de centre 13, lui-même engrenant avec la denture du barillet B par l'intermédiaire d'un renvoi 14. Ce mobile d'entrée 12a est monté pivotant sur la platine P du bâti par l'intermédiaire d'un roulement à billes 15. Ce mobile d'entrée 12a porte deux satellites 12b dont chacun présente deux dentures, l'une engrenant avec un mobile solaire 12c solidaire d'un arbre 12d monté pivotant dans des paliers solidaires du bâti, l'autre engrenant avec un pignon 12e solidaire du second mobile de sortie 12f, le premier mobile de sortie 12g étant solidaire de l'arbre 12d. Un ressort de rappel 16 formé par un ressort spiral présente une extrémité fixée à l'arbre 12d et une autre extrémité fixée au bâti BA.We will now describe more specifically the hour counter using the figures 1 , 3 and 4 . This essentially comprises a planetary gear 12 comprising an input mobile 12a meshing with the pinion of the center wheel 13, itself meshing with the toothing of the barrel B via a return 14. 12a input is pivotally mounted on the plate P of the frame by means of a ball bearing 15. This input mobile 12a carries two satellites 12b each of which has two teeth, one meshing with a solar mobile 12c solidarity a shaft 12d pivotally mounted in bearings integral with the frame, the other meshing with a pinion 12e secured to the second output mobile 12f, the first output mobile 12g being secured to the shaft 12d. A spring 16 formed by a spiral spring has one end fixed to the shaft 12d and another end fixed to the frame BA.

La première roue de sortie 12g de l'engrenage planétaire est en prise, d'une part, avec une roue 17 portant l'aiguille 17a du compteur d'heures et d'autre part, avec une roue 18 en prise avec un organe de positionnement 19 monté pivotant sur l'arbre de la roue 18. Cet organe de positionnement 19 comporte une cheville 19a engagée dans une ouverture en arc de cercle 18a concentrique à l'axe de pivotement de la roue 18, ainsi qu'une denture 19b en prise avec un sautoir 20.The first output gear 12g of the planetary gear is engaged on the one hand with a wheel 17 carrying the hour meter needle 17a and on the other hand with a wheel 18 in engagement with an actuator member. positioning 19 pivotally mounted on the shaft of the wheel 18. This positioning member 19 comprises a pin 19a engaged in an arcuate opening of circle 18a concentric with the axis of pivoting of the wheel 18, as well as a toothing 19b engaged with a jumper 20.

Deux freins ou organes d'arrêt 21a, 21b sont montés pivotants autour d'un arbre commun 21c, l'un des freins 21a étant monté libre sur cet arbre et l'autre 21c étant solidaire de cet arbre 21c. La partie avant de l'organe d'arrêt supérieur 21a est pressée en direction de la première roue de sortie 12g par un ressort 22 et la partie avant de l'organe d'arrêt inférieur 21b est pressée en direction de la seconde roue de sortie 12f par un ressort 23. Les parties arrières des organes d'arrêt 21a, 21b sont pressées par leurs ressorts respectifs 22, 23 contre deux cames respectives 24a, 24b calées sur un arbre commun 24c, solidaire d'un pignon 24d qui engrène avec un pignon 1b solidaire de la roue à colonnes 1.Two brakes or stop members 21a, 21b are pivotally mounted around a common shaft 21c, one of the brakes 21a being freely mounted on this shaft and the other 21c being secured to the shaft 21c. The front part of the upper stop member 21a is pressed towards the first output wheel 12g by a spring 22 and the front portion of the lower stop member 21b is pressed towards the second output wheel 12f by a spring 23. The rear parts of the stop members 21a, 21b are pressed by their respective springs 22, 23 against two respective cams 24a, 24b keyed on a common shaft 24c, integral with a pinion 24d which meshes with a pinion 1b integral with the column wheel 1.

Le frein ou organe d'arrêt 21a, présente une saillie 21a', qui se situe sur la trajectoire d'une partie 19c de l'organe de positionnement 19.The brake or stop member 21a has a projection 21a 'which lies in the path of a portion 19c of the positioning member 19.

Si on observe la figure 1, on constate que le mobile 6 du compteur de minutes porte deux cames, une came en coeur 6a de remise à zéro et une came en spirale 6b pour le retour rétrograde de l'aiguille indicatrice 25a solidaire de la roue 25 du compteur de minutes (figures 1, 4). A cet effet, la roue 25 engrène avec une roue 26 dont le pignon 26a est en prise avec un secteur denté 27a situé à une extrémité d'une bascule 27. L'autre extrémité de cette bascule 27 présente un palpeur 27b qui est maintenu en contact avec la came 6b grâce au couple exercé sur la roue 26 par un ressort de rappel 28. Ainsi, chaque fois que le palpeur 27b arrive à l'extrémité externe de la came en spirale 6b de la roue 6 elle, tombe brusquement contre la partie basse de cette came, faisant tourner les roues 25, 26 en sens rétrograde par rapport à leur entraînement par le profil en spiral de la came 6b, ramenant l'aiguille des minutes 25a à sa position de départ. La période mesurée entre deux retours rétrogrades de l'aiguille 25a est de 30 minutes.If we look at the figure 1 it can be seen that the mobile 6 of the minute counter carries two cams, a reset cam 6a and a spiral cam 6b for the retrograde return of the indicator needle 25a integral with the wheel 25 of the minute counter ( figures 1 , 4 ). For this purpose, the wheel 25 meshes with a wheel 26 whose pinion 26a is engaged with a toothed sector 27a located at one end of a rocker 27. The other end of this rocker 27 has a feeler 27b which is held in position. contact with the cam 6b thanks to the torque exerted on the wheel 26 by a return spring 28. Thus, each time the feeler 27b reaches the outer end of the spiral cam 6b of the wheel 6 it falls suddenly against the lower part of this cam, rotating the wheels 25, 26 in retrograde direction relative to their drive by the spiral profile of the cam 6b, bringing the minute hand 25a to its starting position. The period measured between two retrograde returns of the needle 25a is 30 minutes.

La roue 26 du rouage du compteur de minutes porte un doigt de commande 26b qui coupe la trajectoire d'une partie 19d de l'organe de positionnement 19.The wheel 26 of the wheel of the minute counter carries a control finger 26b which intersects the trajectory of a portion 19d of the positioning member 19.

Comme on peut s'en rendre compte, étant donné que le différentiel 12 est en prise directe avec la roue de centre 13 du rouage de finissage, ce différentiel est entraîné de manière continue, que le chronographe soit en marche ou non. La mise en marche et l'arrêt du chronographe s'effectue de manière habituelle à l'aide de la bascule 2 de commande (figure 2) dont le cliquet 2b entraîne d'un pas le pignon à denture à rochet la de la roue à colonnes 1 à chaque basculement pour commander les différentes fonctions du chronographe. Grâce aux cames 24a, 24b en liaison cinématique avec la roue à colonnes, les freins d'arrêt 21a, 21b sont commandés séquentiellement de la façon suivante : Lorsque le mécanisme de chronographe n'est pas en fonction, le frein d'arrêt supérieur 21a appuie contre la première roue de sortie 12g et est écarté de la seconde roue de sortie 12f, permettant à celle-ci de tourner dans le vide, ce qui est nécessaire sinon le rouage de finissage s'arrêterait. Au moment de la mise en marche du chronographe, les positions respectives des deux freins 21a, 21b s'inversent, c'est-à-dire que le frein 21a libère la première roue de sortie 12g et arrête la seconde roue de sortie 12f, permettant à la première roue de sortie 12g d'entraîner la roue 17 et l'aiguille 17a du compteur d'heures.As can be appreciated, since the differential 12 is in direct contact with the center wheel 13 of the work train, this differential is driven continuously, whether the chronograph is running or not. The starting and stopping of the chronograph is carried out in the usual way using the control rocker 2 ( figure 2 ) whose pawl 2b drives the ratchet pinion of the column wheel 1 at each pitch to control the various functions of the chronograph. With the cams 24a, 24b kinematically connected to the column wheel, the brakes 21a, 21b are sequentially controlled as follows: When the chronograph mechanism is not in operation, the upper stop brake 21a presses against the first output wheel 12g and is separated from the second output wheel 12f, allowing it to turn in the vacuum, which is necessary otherwise the finishing gear would stop. At the start of the chronograph, the respective positions of the two brakes 21a, 21b reverse, that is to say that the brake 21a releases the first output wheel 12g and stops the second output wheel 12f, allowing the first output wheel 12g to drive the wheel 17 and the needle 17a of the hour counter.

Lors de l'arrêt du mécanisme de chronographe, les positions respectives des deux freins d'arrêt 21a, 21b s'inversent à nouveau en sorte que le frein 21a arrête la première roue de sortie 12g et libère la seconde roue de sortie 12f. Lors de la remise à zéro, les deux freins d'arrêt 21a, 21b libèrent simultanément les deux roues de sortie 12g, 12f permettant au ressort de rappel 16 de se désarmer en ramenant le compteur d'heures à zéro, en sorte que dans ce cas, la roue de sortie 12g fonctionne simultanément comme roue d'entrée par laquelle l'énergie accumulée dans le ressort de rappel entre et ressort.When stopping the chronograph mechanism, the respective positions of the two stop brakes 21a, 21b are reversed again so that the brake 21a stops the first output wheel 12g and releases the second output wheel 12f. When resetting, the two brakes 21a, 21b simultaneously release the two output wheels 12g, 12f allowing the return spring 16 to disarm by reducing the hours counter to zero, so that in this case, the output wheel 12g operates simultaneously as input wheel by which the energy accumulated in the return spring between and spring.

L'engrenage planétaire 12 selon l'invention comporte donc deux mobiles d'entrée 12a, 12g et deux mobiles de sortie 12f, 12g, ce dernier pouvant remplir les deux fonctions, de sorte que cet engrenage planétaire fonctionne selon le principe d'un engrenage différentiel.The planet gear 12 according to the invention therefore comprises two input mobiles 12a, 12g and two output mobiles 12f, 12g, the latter being able to fulfill both functions, so that this planetary gear operates according to the principle of a gear differential.

Ce retour à zéro du compteur d'heures peut se produire dans deux cas, lors d'un retour volontaire à l'aide de la roue à colonnes 1 qui correspond à la remise à zéro, ou lorsque le compteur d'heures arrive à la fin de sa capacité de mesure qui correspond au retour à zéro.This return to zero of the hour counter can occur in two cases, during a voluntary return using the column wheel 1 which corresponds to the reset, or when the hour counter arrives at the end of its measurement capacity which corresponds to the return to zero.

La remise à zéro est provoquée par un entraînement de la roue à colonnes 1 par le cliquet 2a de la bascule de commande 2, suite à la commande de l'arrêt du chronographe, qui a pour effet la remise à zéro habituelle des compteurs de secondes 5 et de minutes 6 à l'aide des marteaux 4a, 4b (figure 1). Simultanément, la came 24a, (figures 1, 3) en liaison cinématique avec la roue à colonnes 1 soulève le frein d'arrêt 21a, 21b, permettant au ressort de rappel 16 de ramener la première roue de sortie 12g de l'engrenage planétaire en position de repos. Cette position est définie par l'ouverture en arc de cercle 18a de la roue 18 engrenant avec la première roue de sortie 12g de l'engrenage planétaire, dont le déplacement est limité par la cheville 19a de l'organe de positionnement 19, lui-même positionné par le sautoir 20 engagé dans sa denture 19b, dans la position représentée par la figure 2. Outre le sautoir 20, cette position de retour à zéro peut être définie par une butée fixe 30 solidaire du bâti contre laquelle l'organe de positionnement 19 vient buter.The reset is caused by a drive of the column wheel 1 by the ratchet 2a of the control lever 2, following the control of the stopping of the chronograph, which has the effect of the usual resetting of the seconds counters 5 and minutes 6 using the hammers 4a, 4b ( figure 1 ). Simultaneously, the cam 24a, ( Figures 1, 3 ) in kinematic connection with the column wheel 1 raises the stop brake 21a, 21b, allowing the return spring 16 to bring the first output wheel 12g of the sun gear into the rest position. This position is defined by the opening in an arc 18a of the wheel 18 meshing with the first output wheel 12g of the planetary gear, the displacement of which is limited by the pin 19a of the positioning member 19, itself same positioned by the jumper 20 engaged in its teeth 19b, in the position represented by the figure 2 . In addition to jumper 20, this return to zero position can be defined by a fixed stop 30 secured to the frame against which the positioning member 19 abuts.

Le retour à zéro se produit automatiquement lorsque le compteur d'heures arrive à la fin de sa capacité de comptage. Dans l'exemple décrit, cette capacité de comptage est de douze heures. On va décrire ce retour à zéro à l'aide des figures 5 à 8.The return to zero occurs automatically when the hour counter reaches the end of its counting capacity. In the example described, this counting capacity is twelve hours. We will describe this return to zero using the Figures 5 to 8 .

La figure 5 représente les positions respectives de la roue 18, de l'organe de positionnement 19 et du doigt de commande 26b solidaire de la roue 26. Ce doigt de commande 26b effectue un mouvement oscillant toutes les 30 minutes, qui consiste en un déplacement dans le sens contraire à celui des aiguilles d'une montre pendant 30 minutes suivi d'un retour brusque en sens inverse dans la position illustrée par la figure 1. Quant à la roue 18, elle est entraînée en continu dans le sens contraire à celui des aiguilles d'une montre durant les 12 heures de sa capacité de comptage.The figure 5 represents the respective positions of the wheel 18, the positioning member 19 and the control finger 26b integral with the wheel 26. This control finger 26b performs an oscillating movement every 30 minutes, which consists of a displacement in the direction counter-clockwise for 30 minutes followed by a sharp reverse in the position illustrated by the figure 1 . As for the wheel 18, it is driven continuously in the opposite direction to that of the clockwise during the 12 hours of its counting capacity.

Après le retour à zéro, la roue 18 et l'organe de positionnement 19 sont dans la position illustrée par la figure 8. Après avoir tourné pendant 11 heures et 45 minutes, ces mêmes organes sont dans la position illustrée par la figure 5, c'est-à-dire que l'ouverture en arc de cercle 18a de la roue 18 s'est déplacée d'une extrémité à l'autre par rapport à la cheville 19a de l'organe de positionnement 19, lequel est resté immobile.After the return to zero, the wheel 18 and the positioning member 19 are in the position illustrated by the figure 8 . After shooting for 11 hours and 45 minutes, these same organs are in the position illustrated by the figure 5 , that is to say that the opening in an arc 18a of the wheel 18 has moved from one end to the other relative to the pin 19a of the positioning member 19, which has remained motionless.

Durant le dernier quart d'heure de la capacité de mesure du compteur d'heures, la roue 18 continue d'être entraînée dans le sens contraire à celui des aiguilles d'une montre et entraîne l'organe de positionnement 19 à l'aide de la cheville 19a de ce dernier en butée contre l'ouverture en arc de cercle 18a, déplaçant le secteur denté 19b d'une dent par rapport au sautoir de positionnement 20, comme illustré par la figure 6. Comme on le constate, ce déplacement de l'organe de positionnement amène son extrémité 19d dans la trajectoire décrite par le doigt oscillant 26b solidaire de la roue 26.During the last fifteen minutes of the measuring capacity of the hour counter, the wheel 18 continues to be driven in the opposite direction to that of the clockwise and drives the positioning member 19 using the pin 19a of the latter abuts against the opening in an arc 18a, moving the toothed sector 19b of a tooth relative to the jumper 20, as illustrated by the figure 6 . As we can see, this displacement of the organ of positioning brings its end 19d in the path described by the oscillating finger 26b secured to the wheel 26.

Par conséquent, lorsque ce doigt 26b revient à zéro à la fin du comptage de la dernière période de 30 minutes du compteurs de minutes, il rencontre l'extrémité 19d de l'organe de positionnement et l'entraîne d'un nouveau pas du secteur denté 19b de l'organe de positionnement, dans la position illustrée par la figure 7. Dans cette position, la partie 19c de l'organe de positionnement 19 rencontre la saillie 21a', du frein d'arrêt 21a et le soulève à l'encontre de son ressort de rappel 22, libérant ainsi la roue de sortie 12g de l'engrenage planétaire, permettant au ressort de rappel 16 de ramener la première roue de sortie 12g dans sa position initiale. Au cours de ce déplacement de la roue 12g, la roue 18 est entraînée dans le sens des aiguilles de la montre et l'extrémité opposée de l'ouverture en arc de cercle 18a rencontre la cheville 19a et ramène l'organe de positionnement dans sa position initiale illustrée par la figure 8.Consequently, when this finger 26b returns to zero at the end of the counting of the last 30 minute period of the minute counters, it encounters the end 19d of the positioning member and leads it to a new pitch of the sector. toothed 19b of the positioning member, in the position illustrated by the figure 7 . In this position, the portion 19c of the positioning member 19 meets the projection 21a 'of the stop brake 21a and lifts it against its return spring 22, thus releasing the output wheel 12g of the planetary gear, allowing the return spring 16 to return the first output wheel 12g to its initial position. During this movement of the wheel 12g, the wheel 18 is driven clockwise and the opposite end of the opening in a circular arc 18a meets the pin 19a and brings the positioning member back into position. initial position illustrated by the figure 8 .

Comme on peut le constater, le compteur d'heures selon la présente invention ne comporte aucun marteau de remise à zéro et aucun dispositif d'embrayage, le différentiel étant constamment entraîné au même titre que le rouage de finissage de la pièce d'horlogerie, les freins d'arrêt 21a, 21b permettant d'arrêter sélectivement et alternativement les roues de sortie 12g, 12f pour mettre en marche ou arrêter le mécanisme de chronographe, la remise à zéro étant obtenue par la libération des roues de sortie 12g, 12f, la position de retour ou de remise à zéro étant définie par l'organe de positionnement comme décrit en détail précédemment.As can be seen, the hour meter according to the present invention does not include any reset hammer and no clutch device, the differential being constantly driven in the same way as the finishing gear of the timepiece, the stop brakes 21a, 21b for selectively and alternatively stopping the output wheels 12g, 12f to start or stop the chronograph mechanism, the zeroing being obtained by the release of the output wheels 12g, 12f, the return or reset position being defined by the positioning member as described in detail above.

Claims (4)

  1. Timepiece provided with a chronograph mechanism comprising a going barrel (B), a going train controlled by an escapement, a retrograde minute counter (6, 25, 26, 27), an hour counter (12, 14, 17), and means (1) for the manual selective, starting and stopping of said counters, said timepiece being characterized in that the hour counter (12, 14, 17) comprises an epicyclic gear (12) comprising a force-taking wheel unit (12a) connected kinematically with the going train and carrying planet wheel units (12b) in mesh with a sun wheel unit (12c), two output wheel units, of which the first (12g), which is able to move between two limit positions, is attached to the sun wheel unit (12c) and is connected kinematically to an hour counting wheel unit (17), and of which the second (12f) is connected kinematically to the planet wheel units (12b), two stop members (21a, 21b) connected kinematically to said means for the manual selective starting and stopping of said counters (1), in order to stop correspondingly and selectively the two output wheel units (12g, 12f), and elastic return means (16) that tend constantly to return said first output wheel unit (12g) to its first limit position.
  2. Timepiece according to Claim 1 in which the first output wheel unit (12g) of the epicyclic gear is in mesh with a device for positioning it in its two limit positions that comprises a wheel unit (18) connected kinematically to this first output wheel unit and in mesh with a movable positioning member (19) that has, on the one hand, a release member (19c) for one (21a) of said stop members (21a, 21b) and, on the other hand, positioning teeth (19b) in mesh with a jumper (20) to keep this movable positioning member (19) elastically in three positions, a first or stop position of the first output wheel unit (12g) in its first limit position controlled by said elastic return means (16), a second position controlled by the movement of the first output wheel unit (12g) of the epicyclic train in opposition to said elastic return means (16), in which position said movable positioning member (19) is placed in mesh with a control wheel unit (26b) connected kinematically to the retrograde minute counter (6), and a third position, controlled by the retrograde movement of the minute counter on said control wheel unit (26b) kinematically connected to it, in which the disengagement element (19c) of said positioning member is in mesh with said stop members (21a, 21b) in order to disengage them from the output wheel units (12g, 12f) of the epicyclic train.
  3. Timepiece according to Claim 2, in which the retrograde minute counter (6, 25, 26, 27) comprises a rocker (27) with one arm having a toothed sector (27a) in mesh with a toothed pinion (26a) of said control wheel unit (26b) of said positioning member (19), while the other arm of this rocker (27) serves to follow the profile of a retrograde return cam (6b) attached to a wheel unit (6) of the minute counter and return means (28) of said control wheel unit (26b) that tend to keep the other arm of said rocker (27) against the profile of the retrograde return cam (6b).
  4. Timepiece according to Claim 1, in which two control cams (24a, 24b) of said stop members (21a, 21b) attached to each other are mounted on a common arbor carrying a pinion (24d) in mesh with a pinion (1a) attached to said means for the manual selective starting and stopping of said counters (1).
EP07816201A 2006-11-07 2007-10-19 Timepiece provided with a chronograph mechanism Active EP2080069B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07816201A EP2080069B1 (en) 2006-11-07 2007-10-19 Timepiece provided with a chronograph mechanism

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06405470A EP1921524A1 (en) 2006-11-07 2006-11-07 Mit einem Chronographenmechanismus ausgerüstete mechanische Uhr
EP07816201A EP2080069B1 (en) 2006-11-07 2007-10-19 Timepiece provided with a chronograph mechanism
PCT/CH2007/000518 WO2008055368A1 (en) 2006-11-07 2007-10-19 Timepiece provided with a chronograph mechanism

Publications (2)

Publication Number Publication Date
EP2080069A1 EP2080069A1 (en) 2009-07-22
EP2080069B1 true EP2080069B1 (en) 2010-02-24

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EP06405470A Withdrawn EP1921524A1 (en) 2006-11-07 2006-11-07 Mit einem Chronographenmechanismus ausgerüstete mechanische Uhr
EP07816201A Active EP2080069B1 (en) 2006-11-07 2007-10-19 Timepiece provided with a chronograph mechanism

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06405470A Withdrawn EP1921524A1 (en) 2006-11-07 2006-11-07 Mit einem Chronographenmechanismus ausgerüstete mechanische Uhr

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EP (2) EP1921524A1 (en)
AT (1) ATE459027T1 (en)
DE (1) DE602007005018D1 (en)
WO (1) WO2008055368A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9477206B2 (en) 2014-11-13 2016-10-25 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Split-seconds device with epicycloidal train for a timepiece

Families Citing this family (2)

* 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.
CH704775A2 (en) * 2011-04-08 2012-10-15 Richemont Int Sa chronograph mechanism.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH61025A (en) * 1912-09-24 1913-09-01 Adrien Aubert Chronograph-counter watch
US2325539A (en) * 1939-08-22 1943-07-27 Firm Soc Ind De Soneeboz Sa Timepiece with chronograph
GB534672A (en) * 1939-08-22 1941-03-13 Sonceboz Sa Improvements in or relating to time piece with chronograph

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9477206B2 (en) 2014-11-13 2016-10-25 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Split-seconds device with epicycloidal train for a timepiece

Also Published As

Publication number Publication date
ATE459027T1 (en) 2010-03-15
DE602007005018D1 (en) 2010-04-08
WO2008055368A1 (en) 2008-05-15
EP2080069A1 (en) 2009-07-22
EP1921524A1 (en) 2008-05-14

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