EP2221676B1 - Timepiece including a chronograph and a watch - Google Patents

Timepiece including a chronograph and a watch Download PDF

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Publication number
EP2221676B1
EP2221676B1 EP09153518A EP09153518A EP2221676B1 EP 2221676 B1 EP2221676 B1 EP 2221676B1 EP 09153518 A EP09153518 A EP 09153518A EP 09153518 A EP09153518 A EP 09153518A EP 2221676 B1 EP2221676 B1 EP 2221676B1
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EP
European Patent Office
Prior art keywords
wheel
chronograph
resonator
barrel
gear train
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP09153518A
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German (de)
French (fr)
Other versions
EP2221676A1 (en
Inventor
Dominique Léchot
Alain Zaugg
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.)
Montres Breguet SA
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Montres Breguet 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 Montres Breguet SA filed Critical Montres Breguet SA
Priority to CH00274/09A priority Critical patent/CH700459A2/en
Priority to EP09153518A priority patent/EP2221676B1/en
Priority to AT09153518T priority patent/ATE517373T1/en
Priority to CN2010101417818A priority patent/CN101833279B/en
Priority to JP2010038424A priority patent/JP5255008B2/en
Priority to US12/711,399 priority patent/US8328413B2/en
Publication of EP2221676A1 publication Critical patent/EP2221676A1/en
Application granted granted Critical
Publication of EP2221676B1 publication Critical patent/EP2221676B1/en
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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
    • G04B15/00—Escapements
    • 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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • 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 comprising a chronograph whose hands are driven by a first train causing in turn a first resonator and a watch whose hands are driven by a second wheel independent of the first, this second train causing in turn a second resonator.
  • the document EP1333345 proposes a device comprising a watch whose hourly indicators are driven by a first cylinder connected to a first wheel and a first regulating member, and an autonomous chronograph module whose indicators are driven by a second cylinder independent of the first, connected to a second wheel and a second regulating member.
  • the device described above guarantees the independence of the two movements and therefore an undisturbed movement of the watch when the chronograph is in operation. This independence, however, comes at the cost of a complicated system including a double barrel.
  • the present invention overcomes this state of affairs. Indeed, the timepiece that it offers, in addition that it obeys what is exposed in the first paragraph of this description is original in that the first and second wheels are driven from a single source of energy.
  • Timepiece 1 of figures 1 and 2 is composed of a chronograph whose hands 2 and 3 are driven by a first wheel 4 causing in turn a first resonator 5.
  • the chronograph taken here as an example is equipped with a second-hand needle 2 and a needle 3 equipping a retrograde minute counter.
  • the needles 2 and 3 are driven by the first wheel 4 shown in figure 2 where the second-hand hand 2, not shown, is mounted on the second mobile 21 forming part of this first gear 4.
  • the minute counter driving the retrograde hand 3 is not shown in the drawing, but is linked by a This first gear 4 in turn drives a first resonator 5 at the end of its travel.
  • This resonator comprises a balance-spring 22 on the axis of which is fixed a plate 23 provided with a pin actuated by an anchor 24 cooperating with an escape wheel 25 driven by the last wheel 50 of the train 4.
  • the timepiece figures 1 and 2 also includes a watch whose hands 6 and 7 are driven by a second wheel 8, independent of the first wheel 4, the second wheel 8 causing in turn a second resonator 9.
  • the watch taken here as an example is equipped with a minute hand 6 and a hand of hour 7.
  • the hands are driven by the second wheel 8 shown in FIG. figure 2 .
  • Said needles are fitted in a known manner, but not shown on the figure 2 , on a center pinion 26, this pinion forming the first mobile of the second wheel 8.
  • This second wheel 8 in turn drives a second resonator 9.
  • This resonator comprises a balance spring 27 on the axis of which is fixed a plate 28 provided with an anchor actuated by an anchor 29 cooperating with an escape wheel 30 driven by the last wheel 31 of the wheel 8.
  • figures 1 , 2 and 3 clearly show that the first and second wheels 4 and 8 are driven from a single energy source 10, which distinguishes the present invention from the device EP1333345 previously cited, where the chronograph and watch wheels are each driven by a source of energy.
  • the energy source is a barrel 10 freely rotating around a shaft 11, this barrel 10 containing a mainspring 12 as clearly shown in FIG. figure 3 .
  • the shaft 11 pivots between a plate 44 and a bridge 45.
  • the barrel 10 usually carries a crown wheel 13 in direct contact with the center gear 26 departure of the second train 8 driving the watch mechanism. It is also conceivable to make this crown wheel 13 leave also the first gear train driving the chronograph mechanism in which case the main characteristic of the present invention would also be satisfied, namely to drive the first and second wheels 4 and 8 from a cylinder unique.
  • the setting in function of the chronograph does not affect in any way the march of the watch because the wheel of the chronograph is not arranged in derivation of the wheel of the watch.
  • This solution not described here in detail requires the use of a clutch disconnecting the barrel gear of the chronograph when the latter is at a standstill.
  • the barrel 10 carries a crown wheel 13 in engagement with the second wheel 8.
  • the first mobile of this second wheel is the center gear 26 on which are fitted a roadway 32 carrying the minute hand 6 and a wheel with barrel 33 carrying the hour hand 7.
  • the barrel 10 contains the mainspring 12 and freely rotates around the shaft 11.
  • a first set 14 (see also figure 4 ) composed of a ratchet 15 and a wolf wheel 16 is integral with the shaft 11 and is fixed by means of a screw 34.
  • the armature ratchet 15 allows the winding of the spring 12 and is therefore linked to a winding mechanism which is not shown in the drawing.
  • the barrel still carries a second set 17 (see also figure 5 )
  • This second assembly rotates freely around the shaft 11 and has a driver ratchet 18 and at least one pawl 19 (here two pawls 19 are used) cooperating with the teeth 20 that present the wolf wheel 16.
  • Springs 38 support the pawls 19 on the wolf wheel 16.
  • the driver ratchet 18 is engaged with the first gear 4, in this case with the first mobile 37 of this first wheel comprising a pinion 35 and a wheel 36.
  • the barrel spring 12 is raised by the crown 43 fitted to the winding mechanism.
  • the first assembly 14 comprising the armature ratchet 15 and the wolf wheel 16 rotates counterclockwise.
  • the second set 17 comprising the coach ratchet 18 and the pawls 19 is held stationary by a brake (not shown in the drawing) preventing the center wheel 40 belonging to the second mobile 21 to rotate.
  • the pawls 19 jump on the teeth 20 of the wolf wheel 16 and no torque is imparted to the driver ratchet 18.
  • the spring is armed so that the crown wheel 13 the barrel 10 rotates counterclockwise and drives the center pinion 26 of the watch clockwise and with it the hour and minute hands that are related thereto.
  • the brake acting on the center wheel 40 of said chronograph is released.
  • the wolf wheel 16 begins to rotate clockwise, that is to say in the opposite direction to the one she had when reassembling.
  • the pawls 19 are caught by the toothing of the wolf-tooth wheel 16, which causes the driver ratchet 18 to turn clockwise and to drive the first wheel 4 of the chronograph.
  • the second mobile 21 linked to the train 4 will also rotate in the clockwise direction by the interposition of the mobile 37 composed of the pinion 35 and the wheel 36.
  • the chronograph may have a single push button for starting, stopping and resetting its second hand or two pushers as shown on the figure 1 where the right pusher 41 allows the start and stop of the needles 2 and 3 and where the left pusher 42 allows the reset of the same needles.
  • the timepiece that has just been described comprises two resonators 5 and 9.
  • the resonator 9 of the watch is dimensioned such that its balance 27 executes 18'000 vibrations per hour which leads to a display at 1/5 of a second.
  • the resonator 5 of the chronograph can be sized such that its balance 22 executes 36,000 vibrations per hour which allows a display to 1/10 of a second for the chronograph second hand. So we can take advantage of the presence of two separate resonators to make oscillating the chronograph resonator at a frequency higher than the frequency of the resonator of the watch.

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

Abstract

The timepiece has a chronograph comprising sweep second hand and minute hand driven by a gear train (4), which in turn drives a resonator (5). A watch comprises minute and hour hands driven by another gear train (8) independent of the former gear train. The latter gear train in turn drives another resonator (9). The frequency of the former resonator is higher than that of the latter resonator. The gear trains are driven using a single energy source i.e. barrel (10). The barrel is freely rotated around a rod, where the barrel contains a mainspring.

Description

La présente invention est relative à une pièce d'horlogerie comprenant un chronographe dont les aiguilles sont entraînées par un premier rouage entraînant à son tour un premier résonateur et une montre dont les aiguilles sont entraînées par un second rouage indépendant du premier, ce second rouage entraînant à son tour un second résonateur.The present invention relates to a timepiece comprising a chronograph whose hands are driven by a first train causing in turn a first resonator and a watch whose hands are driven by a second wheel independent of the first, this second train causing in turn a second resonator.

Comme c'est généralement le cas dans une pièce d'horlogerie réunissant une montre et un chronographe le rouage entraînant le chronographe est placé en dérivation du rouage entraînant la montre, cette pièce d'horlogerie ne comportant qu'une seule source d'énergie et qu'un seul résonateur. Pour prendre un cas concret, cité dans l'ouvrage de B. Humbert « Le Chronographe » aux éditions Scriptar SA La Conversion (Suisse), 1990 , on prolonge le pivot supérieur du mobile de seconde de la montre pour y ajuster une roue sur champ ou première roue entraîneuse de chronographe. Cette dernière est en prise permanente avec une roue intermédiaire solidaire d'une bascule d'embrayage commandée par une roue à colonnes commandée à son tour par un bouton poussoir. Quand la bascule est activée, la roue intermédiaire, appelée aussi roue d'embrayage, entraîne un mobile de chronographe solidaire d'une aiguille trotteuse faisant un tour en une minute.As is generally the case in a timepiece uniting a watch and a chronograph, the gear train driving the chronograph is placed in shunting of the train driving the watch, this timepiece having only one source of energy and only one resonator. To take a concrete case, quoted in the book B. Humbert "The Chronograph" by Scriptar SA La Conversion (Switzerland), 1990 , the upper pivot of the second mobile of the watch is extended to fit a wheel on the field or first chronograph driving wheel. The latter is permanently engaged with an intermediate wheel secured to a clutch rocker controlled by a column wheel controlled in turn by a push button. When the rocker is activated, the intermediate wheel, also called clutch wheel, causes a chronograph mobile solidarity with a second-hand hand making a turn in one minute.

On comprendra que la façon de faire qui vient d'être sommairement décrite entraîne une instabilité de l'heure affichée par la montre lors du fonctionnement du chronographe cette instabilité étant provoquée par une perte de couple entraînant une diminution de l'énergie d'impulsion transmise au balancier-spiral. Ainsi la précision de marche de la montre est-elle affectée lors du fonctionnement du chronographe.It will be understood that the procedure just described briefly causes an instability of the time displayed by the watch during operation of the chronograph, this instability being caused by a loss of torque resulting in a reduction of the pulse energy transmitted. the balance-spring. Thus the accuracy of the watch is affected during operation of the chronograph.

Il a été proposé un remède pour s'affranchir des inconvénients cités ci-dessus. Le document EP1333345 propose un dispositif comportant une montre dont les indicateurs horaires sont entraînés par un premier barillet relié à un premier rouage et un premier organe régulateur, et un module chronographe autonome dont les indicateurs sont entraînés par un second barillet indépendants du premier, relié à un second rouage et un second organe régulateur.It has been proposed a remedy to overcome the disadvantages mentioned above. The document EP1333345 proposes a device comprising a watch whose hourly indicators are driven by a first cylinder connected to a first wheel and a first regulating member, and an autonomous chronograph module whose indicators are driven by a second cylinder independent of the first, connected to a second wheel and a second regulating member.

Le dispositif décrit ci-dessus garantit bien l'indépendance des deux mouvements et donc une marche non perturbée de la montre lorsque le chronographe est en fonction. Cette indépendance cependant se fait au prix d'un système compliqué faisant appel notamment à un double barillet.The device described above guarantees the independence of the two movements and therefore an undisturbed movement of the watch when the chronograph is in operation. This independence, however, comes at the cost of a complicated system including a double barrel.

La présente invention remédie à cet état de fait. En effet la pièce d'horlogerie qu'elle propose, en plus qu'elle obéit à ce qui est exposé au premier paragraphe de cette description est originale en ce que les premier et second rouages sont entraînés à partir d'une seule source d'énergie.The present invention overcomes this state of affairs. Indeed, the timepiece that it offers, in addition that it obeys what is exposed in the first paragraph of this description is original in that the first and second wheels are driven from a single source of energy.

L'invention, qui est définie par les revendications annexées, va être expliquée maintenant en détail ci-dessous par un mode d'exécution donné à titre d'exemple non limitatif, cette exécution étant illustrée par les dessins annexés dans lesquels :

  • la figure 1 est une vue générale en plan de la pièce d'horlogerie exécutée selon la présente invention,
  • la figure 2 est une vue en perspective de la partie essentielle du mécanisme réalisé selon l'invention et incorporé dans la pièce d'horlogerie,
  • la figure 3 est une coupe dans la source d'énergie alimentant la pièce d'horlogerie selon l'invention, cette source d'énergie étant en prise d'une part avec le rouage de la montre et d'autre part avec le rouage du chronographe,
  • la figure 4 est une vue en perspective du rochet d'armage qui équipe la source d'énergie de l'invention, et
  • la figure 5 est une vue en perspective du rochet d'entraînement du chronographe qui équipe la source d'énergie de l'invention.
The invention, which is defined by the appended claims, will now be explained in detail below by an embodiment given by way of non-limiting example, this embodiment being illustrated by the appended drawings in which:
  • the figure 1 is a general plan view of the timepiece executed according to the present invention,
  • the figure 2 is a perspective view of the essential part of the mechanism produced according to the invention and incorporated in the timepiece,
  • the figure 3 is a section in the energy source supplying the timepiece according to the invention, this source of energy being engaged on the one hand with the wheel of the watch and on the other hand with the wheel of the chronograph,
  • the figure 4 is a perspective view of the armature ratchet which equips the energy source of the invention, and
  • the figure 5 is a perspective view of the chronograph drive ratchet that equips the energy source of the invention.

La pièce d'horlogerie 1 des figures 1 et 2 est composée d'un chronographe dont les aiguilles 2 et 3 sont entraînées par un premier rouage 4 entraînant à son tour un premier résonateur 5. En particulier et comme le montre la figure 1, le chronographe pris ici en exemple, est équipé d'une aiguille trotteuse 2 et d'une aiguille 3 équipant un compteur de minutes rétrograde. Les aiguilles 2 et 3 sont entraînées par le premier rouage 4 montré en figure 2 où l'aiguille trotteuse 2, non représentée, est montée sur le mobile de seconde 21 faisant partie de ce premier rouage 4. Le compteur de minutes entraînant l'aiguille rétrograde 3 n'est pas représenté au dessin, mais est lié d'une manière connue au premier rouage 4. Ce premier rouage 4 entraîne à son tour et en fin de parcours un premier résonateur 5. Ce résonateur comporte un balancier-spiral 22 sur l'axe duquel est fixé un plateau 23 muni d'une cheville actionnée par une ancre 24 coopérant avec une roue d'échappement 25 entraînée par la dernière roue 50 du rouage 4.Timepiece 1 of figures 1 and 2 is composed of a chronograph whose hands 2 and 3 are driven by a first wheel 4 causing in turn a first resonator 5. In particular and as shown in FIG. figure 1 , the chronograph taken here as an example, is equipped with a second-hand needle 2 and a needle 3 equipping a retrograde minute counter. The needles 2 and 3 are driven by the first wheel 4 shown in figure 2 where the second-hand hand 2, not shown, is mounted on the second mobile 21 forming part of this first gear 4. The minute counter driving the retrograde hand 3 is not shown in the drawing, but is linked by a This first gear 4 in turn drives a first resonator 5 at the end of its travel. This resonator comprises a balance-spring 22 on the axis of which is fixed a plate 23 provided with a pin actuated by an anchor 24 cooperating with an escape wheel 25 driven by the last wheel 50 of the train 4.

La pièce d'horlogerie des figures 1 et 2 comporte également une montre dont les aiguilles 6 et 7 sont entraînées par un second rouage 8, indépendant du premier rouage 4, ce second rouage 8 entraînant à son tour un second résonateur 9. En particulier et comme le montre la figure 1, la montre prise ici en exemple est équipée d'une aiguille de minute 6 et d'une aiguille d'heure 7. Les aiguilles sont entraînées par le second rouage 8 montré en figure 2. Lesdites aiguilles sont emmanchées de manière connue, mais non représentée sur la figure 2, sur un pignon de centre 26, ce pignon formant le premier mobile du second rouage 8. Ce second rouage 8 entraîne à son tour et en fin de parcours un second résonateur 9. Ce résonateur comporte un balancier-spiral 27 sur l'axe duquel est fixé un plateau 28 muni d'une cheville actionnée par une ancre 29 coopérant avec une roue d'échappement 30 entraînée par la dernière roue 31 du rouage 8.The timepiece figures 1 and 2 also includes a watch whose hands 6 and 7 are driven by a second wheel 8, independent of the first wheel 4, the second wheel 8 causing in turn a second resonator 9. In particular and as shown in FIG. figure 1 , the watch taken here as an example is equipped with a minute hand 6 and a hand of hour 7. The hands are driven by the second wheel 8 shown in FIG. figure 2 . Said needles are fitted in a known manner, but not shown on the figure 2 , on a center pinion 26, this pinion forming the first mobile of the second wheel 8. This second wheel 8 in turn drives a second resonator 9. This resonator comprises a balance spring 27 on the axis of which is fixed a plate 28 provided with an anchor actuated by an anchor 29 cooperating with an escape wheel 30 driven by the last wheel 31 of the wheel 8.

Selon la caractéristique principale de la présente invention, les figures 1, 2 et 3 montrent clairement que les premier et second rouages 4 et 8 sont entraînés à partir d'une seule source d'énergie 10, ce qui distingue la présente invention du dispositif EP1333345 précédemment cité, où les rouages de chronographe et de montre sont entraînés chacun par une propre source d'énergie.According to the main feature of the present invention, figures 1 , 2 and 3 clearly show that the first and second wheels 4 and 8 are driven from a single energy source 10, which distinguishes the present invention from the device EP1333345 previously cited, where the chronograph and watch wheels are each driven by a source of energy.

En particulier, dans la pièce d'horlogerie prise ici en exemple, la source d'énergie est un barillet 10 tournant librement autour d'un arbre 11, ce barillet 10 contenant un ressort moteur 12 comme le montre bien la figure 3. L'arbre 11 pivote entre une platine 44 et un pont 45.In particular, in the timepiece taken here as an example, the energy source is a barrel 10 freely rotating around a shaft 11, this barrel 10 containing a mainspring 12 as clearly shown in FIG. figure 3 . The shaft 11 pivots between a plate 44 and a bridge 45.

Le barillet 10 porte de façon habituelle une roue de couronne 13 en prise directe avec le pignon de centre 26 départ du second rouage 8 entraînant le mécanisme de la montre. On peut imaginer faire partir également de cette roue de couronne 13 le premier rouage entraînant le mécanisme du chronographe auquel cas la caractéristique principale de la présente invention serait également satisfaite, à savoir entraîner les premier et second rouages 4 et 8 à partir d'un barillet unique. Dans cette configuration en effet, la mise en fonction du chronographe n'affecte en rien la marche de la montre car le rouage du chronographe n'est pas disposé en dérivation du rouage de la montre. Cette solution non décrite ici dans le détail, nécessite l'utilisation d'un embrayage déconnectant du barillet le rouage du chronographe quand ce dernier se trouve à l'arrêt.The barrel 10 usually carries a crown wheel 13 in direct contact with the center gear 26 departure of the second train 8 driving the watch mechanism. It is also conceivable to make this crown wheel 13 leave also the first gear train driving the chronograph mechanism in which case the main characteristic of the present invention would also be satisfied, namely to drive the first and second wheels 4 and 8 from a cylinder unique. In this configuration indeed, the setting in function of the chronograph does not affect in any way the march of the watch because the wheel of the chronograph is not arranged in derivation of the wheel of the watch. This solution not described here in detail, requires the use of a clutch disconnecting the barrel gear of the chronograph when the latter is at a standstill.

On va décrire maintenant une solution originale permettant l'entraînement direct des premier et second rouages 4 et 8 par le barillet de construction particulièrement simple et qui évite l'utilisation de l'embrayage cité au paragraphe ci-dessus. On se référera pour cela plus particulièrement aux figures 3, 4 et 5.We will now describe an original solution for the direct drive of the first and second wheels 4 and 8 by the barrel of particularly simple construction and avoids the use of the clutch mentioned in the paragraph above. For this purpose, reference will be made to figures 3 , 4 and 5 .

Comme le montre la coupe de la figure 3, le barillet 10 porte une roue de couronne 13 en prise avec le second rouage 8. Le premier mobile de ce second rouage est le pignon de centre 26 sur lequel sont emmanchées une chaussée 32 portant l'aiguille des minutes 6 et une roue à canon 33 portant l'aiguille des heures 7. Le barillet 10 contient le ressort moteur 12 et tourne librement autour de l'arbre 11. Un premier ensemble 14 (voir aussi figure 4) composé d'un rochet d'armage 15 et d'une roue à dents de loup 16 est solidaire de l'arbre 11 et y est fixé au moyen d'une vis 34. Le rochet d'armage 15 permet le remontage du ressort 12 et se trouve donc lié à un mécanisme de remontage qui n'est pas représenté au dessin. Le barillet porte encore un second ensemble 17 (voir aussi figure 5) disposé entre le premier ensemble 14 et le barillet 10. Ce second ensemble tourne librement autour de l'arbre 11 et présente un rochet entraîneur 18 et au moins un cliquet 19 (ici deux cliquets 19 sont utilisés) coopérant avec les dents 20 que présente la roue à dents de loup 16. Des ressorts 38 appuient les cliquets 19 sur la roue à dents de loup 16. Le rochet entraîneur 18 est en prise avec le premier rouage 4, en l'occurrence avec le premier mobile 37 de ce premier rouage comportant un pignon 35 et une roue 36.As shown in the section of the figure 3 , the barrel 10 carries a crown wheel 13 in engagement with the second wheel 8. The first mobile of this second wheel is the center gear 26 on which are fitted a roadway 32 carrying the minute hand 6 and a wheel with barrel 33 carrying the hour hand 7. The barrel 10 contains the mainspring 12 and freely rotates around the shaft 11. A first set 14 (see also figure 4 ) composed of a ratchet 15 and a wolf wheel 16 is integral with the shaft 11 and is fixed by means of a screw 34. The armature ratchet 15 allows the winding of the spring 12 and is therefore linked to a winding mechanism which is not shown in the drawing. The barrel still carries a second set 17 (see also figure 5 ) This second assembly rotates freely around the shaft 11 and has a driver ratchet 18 and at least one pawl 19 (here two pawls 19 are used) cooperating with the teeth 20 that present the wolf wheel 16. Springs 38 support the pawls 19 on the wolf wheel 16. The driver ratchet 18 is engaged with the first gear 4, in this case with the first mobile 37 of this first wheel comprising a pinion 35 and a wheel 36.

Le dispositif qui vient d'être décrit fonctionne de la façon suivante :The device that has just been described operates as follows:

On remonte le ressort 12 de barillet 10 par la couronne 43 équipant le mécanisme de remontoir. Le premier ensemble 14 comprenant le rochet d'armage 15 et la roue à dents de loup 16 tourne dans le sens antihoraire. Lors de cette opération le second ensemble 17 comprenant le rochet entraîneur 18 et les cliquets 19 est maintenu immobile par un frein (non représenté au dessin) empêchant la roue de centre 40 appartenant au mobile de seconde 21 de tourner. Les cliquets 19 sautent sur les dents 20 de la roue à dents de loup 16 et aucun couple n'est imparti au rochet entraîneur 18. Pendant l'opération de remontage et après cette opération le ressort est armé de sorte que la roue de couronne 13 du barillet 10 tourne dans le sens antihoraire et entraîne le pignon de centre 26 de la montre dans le sens horaire et avec lui les aiguilles d'heure et de minute qui lui sont liées.The barrel spring 12 is raised by the crown 43 fitted to the winding mechanism. The first assembly 14 comprising the armature ratchet 15 and the wolf wheel 16 rotates counterclockwise. During this operation the second set 17 comprising the coach ratchet 18 and the pawls 19 is held stationary by a brake (not shown in the drawing) preventing the center wheel 40 belonging to the second mobile 21 to rotate. The pawls 19 jump on the teeth 20 of the wolf wheel 16 and no torque is imparted to the driver ratchet 18. During the winding operation and after this operation the spring is armed so that the crown wheel 13 the barrel 10 rotates counterclockwise and drives the center pinion 26 of the watch clockwise and with it the hour and minute hands that are related thereto.

Lorsqu'on enclenche le chronographe on libère le frein agissant sur la roue de centre 40 dudit chronographe. Sous l'effet du ressort 12 de barillet 10, la roue à dents de loup 16 se met à tourner dans le sens horaire, c'est-à-dire dans le sens opposé à celui qu'elle avait lors du remontage. De ce fait les cliquets 19 sont pris par la denture de la roue à dents de loup 16 ce qui conduit le rochet entraîneur 18 à tourner dans le sens horaire et à entraîner le premier rouage 4 du chronographe. Le mobile de seconde 21 lié au rouage 4, va aussi tourner dans le sens horaire par l'interposition du mobile 37 composé du pignon 35 et de la roue 36.When the chronograph is engaged, the brake acting on the center wheel 40 of said chronograph is released. Under the effect of the spring 12 of the barrel 10, the wolf wheel 16 begins to rotate clockwise, that is to say in the opposite direction to the one she had when reassembling. As a result, the pawls 19 are caught by the toothing of the wolf-tooth wheel 16, which causes the driver ratchet 18 to turn clockwise and to drive the first wheel 4 of the chronograph. The second mobile 21 linked to the train 4, will also rotate in the clockwise direction by the interposition of the mobile 37 composed of the pinion 35 and the wheel 36.

Ainsi de la description qui vient d'être donnée, on a compris que les rouages 4 et 8 respectivement relatifs au chronographe et à la montre sont totalement indépendants l'un de l'autre et que la marche ou l'arrêt du chronographe n'a aucune influence sur la précision de marche de la montre. Tout au plus le fonctionnement du chronographe diminue-t-il la réserve de marche de la pièce d'horlogerie.Thus, from the description that has just been given, it has been understood that the gear wheels 4 and 8 respectively relating to the chronograph and the watch are completely independent of each other and that the chronograph's running or stopping has no influence on the accuracy of the watch. At most the operation of the chronograph decreases the power reserve of the timepiece.

On s'est abstenu dans la description ci-dessus d'exposer comment se réalisent la mise en marche, l'arrêt et la remise à zéro des aiguilles du chronographe qui sont connus de l'homme du métier. En particulier on utilise couramment pour ces fonctions une roue à colonnes ou une came dont la description peut être lue dans l'ouvrage « Le Chronographe » cité dans le préambule de ce document. De même, le chronographe peut présenter un seul poussoir permettant le démarrage, l'arrêt et la remise à zéro de sa trotteuse ou deux poussoirs comme représentés sur la figure 1 où le poussoir de droite 41 permet le démarrage et l'arrêt des aiguilles 2 et 3 et où le poussoir de gauche 42 permet la remise à zéro des mêmes aiguilles.In the description above, it has been refrained from explaining how the starting, stopping and resetting of the chronograph hands which are known to those skilled in the art take place. In particular, it is common for these functions to use a column wheel or a cam whose description can be read in the book "The Chronograph" cited in the preamble of this document. Similarly, the chronograph may have a single push button for starting, stopping and resetting its second hand or two pushers as shown on the figure 1 where the right pusher 41 allows the start and stop of the needles 2 and 3 and where the left pusher 42 allows the reset of the same needles.

La pièce d'horlogerie qui vient d'être décrite comporte deux résonateurs 5 et 9. Généralement le résonateur 9 de la montre est dimensionné de telle façon que son balancier 27 exécute 18'000 alternances à l'heure ce qui conduit à un affichage au 1/5 de seconde. Le résonateur 5 du chronographe peut être dimensionné de telle façon que son balancier 22 exécute 36'000 alternances à l'heure ce qui permet un affichage au 1/10 de seconde pour la trotteuse du chronographe. Ainsi on peut profiter de la présence des deux résonateurs distincts pour faire osciller le résonateur du chronographe à une fréquence plus élevée que la fréquence du résonateur de la montre.The timepiece that has just been described comprises two resonators 5 and 9. Generally the resonator 9 of the watch is dimensioned such that its balance 27 executes 18'000 vibrations per hour which leads to a display at 1/5 of a second. The resonator 5 of the chronograph can be sized such that its balance 22 executes 36,000 vibrations per hour which allows a display to 1/10 of a second for the chronograph second hand. So we can take advantage of the presence of two separate resonators to make oscillating the chronograph resonator at a frequency higher than the frequency of the resonator of the watch.

Claims (4)

  1. Timepiece (1) including a chronograph, whose hands (2, 3) are driven by a first gear train (4), which in turn drives a first resonator (5), and a watch whose hands (6, 7) are driven by a second gear train (8) independent of the first gear train, wherein said second gear train in turn drives a second resonator (9), characterized in that the first (4) and second (8) gear trains are driven from a single energy source (10).
  2. Timepiece according to claim 1, characterized in that the energy source is a barrel (10) arranged to rotate freely about an arbour (11), wherein said barrel contains a mainspring (12).
  3. Timepiece according to claim 2, characterized in that the barrel (10) carries a crown wheel (13) meshed with the second gear train (8) and in that a first assembly (14) formed of a winding ratchet (15) and a wolf tooth wheel (10) is secured to the arbour (11) of the barrel (10), wherein a second assembly (17) is arranged between the first assembly (14) and the barrel (10), said second assembly (17) arranged to rotate freely about said arbour (11) and has a drive ratchet (18) meshed with the first gear train (4) and at least one click (19) hinged on said drive ratchet (18), and said click (19) cooperates with the teeth (20) of the wolf tooth wheel (16).
  4. Timepiece according to claim 1, characterized in that the first resonator (5) has a higher frequency than the frequency of the second resonator (9).
EP09153518A 2009-02-24 2009-02-24 Timepiece including a chronograph and a watch Active EP2221676B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CH00274/09A CH700459A2 (en) 2009-02-24 2009-02-24 Timepiece, has chronograph comprising second and minute hands driven by gear train, and watch comprising minute and hour hands driven by another gear train, where gear trains are independent and driven using single energy source i.e. barrel
EP09153518A EP2221676B1 (en) 2009-02-24 2009-02-24 Timepiece including a chronograph and a watch
AT09153518T ATE517373T1 (en) 2009-02-24 2009-02-24 WATCH CONSISTING OF A CHRONOGRAPH AND A MOVEMENT
CN2010101417818A CN101833279B (en) 2009-02-24 2010-02-23 Timepiece including a chronograph and a watch
JP2010038424A JP5255008B2 (en) 2009-02-24 2010-02-24 Clock with chronograph and watch
US12/711,399 US8328413B2 (en) 2009-02-24 2010-02-24 Timepiece comprising a chronograph and a watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09153518A EP2221676B1 (en) 2009-02-24 2009-02-24 Timepiece including a chronograph and a watch

Publications (2)

Publication Number Publication Date
EP2221676A1 EP2221676A1 (en) 2010-08-25
EP2221676B1 true EP2221676B1 (en) 2011-07-20

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Family Applications (1)

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EP09153518A Active EP2221676B1 (en) 2009-02-24 2009-02-24 Timepiece including a chronograph and a watch

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US (1) US8328413B2 (en)
EP (1) EP2221676B1 (en)
JP (1) JP5255008B2 (en)
CN (1) CN101833279B (en)
AT (1) ATE517373T1 (en)
CH (1) CH700459A2 (en)

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Also Published As

Publication number Publication date
US20100214879A1 (en) 2010-08-26
US8328413B2 (en) 2012-12-11
JP2010197392A (en) 2010-09-09
CN101833279B (en) 2013-05-01
JP5255008B2 (en) 2013-08-07
CN101833279A (en) 2010-09-15
ATE517373T1 (en) 2011-08-15
EP2221676A1 (en) 2010-08-25
CH700459A2 (en) 2010-08-31

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