EP1772783A1 - Watch movement with constant-force device - Google Patents

Watch movement with constant-force device Download PDF

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Publication number
EP1772783A1
EP1772783A1 EP05022045A EP05022045A EP1772783A1 EP 1772783 A1 EP1772783 A1 EP 1772783A1 EP 05022045 A EP05022045 A EP 05022045A EP 05022045 A EP05022045 A EP 05022045A EP 1772783 A1 EP1772783 A1 EP 1772783A1
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EP
European Patent Office
Prior art keywords
wheel
star
average
gear
minute
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.)
Granted
Application number
EP05022045A
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German (de)
French (fr)
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EP1772783B1 (en
Inventor
Eric Goeller
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.)
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Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to AT05022045T priority Critical patent/ATE471538T1/en
Priority to EP05022045A priority patent/EP1772783B1/en
Priority to DE602005021883T priority patent/DE602005021883D1/en
Priority to SG200606730-0A priority patent/SG131854A1/en
Priority to CN2006101495365A priority patent/CN1949101B/en
Priority to JP2006276132A priority patent/JP5032086B2/en
Priority to US11/548,261 priority patent/US7473027B2/en
Publication of EP1772783A1 publication Critical patent/EP1772783A1/en
Application granted granted Critical
Publication of EP1772783B1 publication Critical patent/EP1772783B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
    • G04B17/285—Tourbillons or carrousels
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/22—Compensation of changes in the motive power of the mainspring
    • G04B1/225—Compensation of changes in the motive power of the mainspring with the aid of an interposed power-accumulator (secondary spring) which is always tensioned
    • 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
    • G04B15/10—Escapements with constant impulses for the regulating mechanism

Definitions

  • the present invention relates to a mechanical movement watch whose escapement is driven through a constant force device.
  • the term "constant force deviceā€ has been used for more than a century to designate a member interposed in the gear train connecting the mainspring to the exhaust and comprising a permanently loaded intermediate spring, in order to to transmit a relatively constant torque to the escapement, corresponding to the tension of the intermediate spring.
  • This tension oscillates somewhat, but in a small margin and its average value remains constant over the hours.
  • the variations in the state of armature of the mainspring do not vary the forces applied to the mechanical oscillator, whose amplitude and frequency are then more stable.
  • the constant force device temporarily blocks the part of the wheel train upstream, then a periodic release that retension the intermediate spring.
  • the rate of deblocking is once per second and this makes it possible to blow at this rate a second indicator hand, commonly called "second dead".
  • Constant force devices are thus almost always combined with the seconds wheel, with a second dead display.
  • Various examples of such combinations and their operation are described in patent publications CH 47 297 , CH 98 828 , CH 120 028 , EP 1 319 997 and EP 1,528,443 .
  • the last cited publication further provides that the regulator member driven by the constant force device may be a vortex, which is integral with the output wheel of the constant force device.
  • the mechanism for stopping and releasing the dead-second device periodically must be controlled from the wheel that follows the seconds wheel, and therefore the escape wheel.
  • the first organ undergoing blockage is usually called a "whip", because at the moment it is released, it performs a very fast rotation over a complete revolution or a fraction of a turn, until it is again blocked.
  • the element that blocks the whip is usually an N-shaped star, making a turn in N seconds to release the whip once a second.
  • this star is integral with the escape wheel, because it runs at a speed (one turn in six seconds) which corresponds to an acceptable number of branches of the star.
  • Instant rotation and consecutive sudden stop are accompanied by all the gear located upstream and by the display members associated therewith.
  • the inertia of these elements means that the stop mechanism transmits significant shocks to the exhaust via the star. In this way, a substantial part of the advantages due to a constant driving force of the escapement are lost.
  • the present invention aims at avoiding the above-mentioned drawbacks of the prior art by providing a watch movement with a constant-force device whose instantaneous movements disturb as little as possible the operating conditions of the escapement and the mechanical oscillator. .
  • An additional object is to be able to drive a vortex in good conditions with such a constant-force device.
  • the invention relates to a watch whose movement comprises a constant force device interposed in a work train connecting a spring barrel to an exhaust, the wheel having an average wheel which turns in several minutes and causes a one-second spinning gear per minute, the constant-force device comprising an input member, an output member coaxial with the input member and mechanically connected to a multi-limbed star, a spiral spring resiliently interconnecting rotating the input member to the output member, and a stop gear meshing with the input member and provided with a stop wheel having at least one finger arranged to abut against a branch of said star, the watch being characterized in that the input element of the constant-force device is the moving average, the output element of said device being a second average wheel connected by meshing with the pinion of seconds.
  • the exhaust thus receives a motor torque as constant as possible.
  • the watch comprises a display said dead minute, by a minute hand driven by the finishing train, the number of branches of the star being equal to the number of minutes during which the The star makes a turn, so that the rotation of the star releases the cogwheel, the moving average and the minute hand once a minute.
  • the fact that the minute hand jumps from one division to the next on the minute scale of the watch dial provides an unprecedented visual effect and makes it easier to read the time.
  • the arrangement of the invention of the device on the minute makes it easy to arrange it outside the vortex mechanism
  • a spring-loaded barrel 2 rotates the pinion 3 of an intermediate wheel 4, called the eight-wheel, which meshes with the center pinion 5.
  • a center wheel 6 making one turn per hour.
  • the presence of the intermediate wheel 4 in this example is not directly related to the invention; it is due to the fact that the movement 1 comprises several unrepresented complications to be driven by the barrel 2, which is provided with a longer spring and rotates faster than ordinary barrels.
  • the winding of the mainspring can be manual or automatic.
  • a roadway carrying a minute hand 7 is frictionally mounted on the shaft 8 of the center wheel 6 and rotatably supports a hour wheel carrying a 9 hour hand.
  • the hands of this time display device are shown in the drawings, and this very schematically.
  • the center wheel 6 meshes with the pinion 11 of a mobile of average 12 comprising a first average wheel 13.
  • the mobile 12 is associated with the constant-force device 14 shown in detail in FIGS. 3 and 4.
  • the mobile 12 having an axis of rotation 15, further comprises a plate 16 having a short tubular shaft (not visible in the drawings) which is mounted by a bearing 17 in a bridge 18 and driven into the central hole of the wheel 13.
  • the mobile 12, being driven by the couple motor provided by the barrel 2 forms the input element of the constant-force device 14.
  • a second average wheel 20, forming the output element of the constant-force device 14, is coaxial with the first average wheel 13, this wheel 20 being fixed on a shaft 21 rotatably mounted at the center of the mobile 12.
  • a spiral spring 22 is placed between the plate 16 and the wheel 20, which connects one to the other in rotation in an elastic manner, the inner end of the spring being fixed in a hole 24 of a branch of the wheel 20, while the outer end of the spring is fixed to the plate 16.
  • An eight-pointed star 26 is attached to the upper end of the shaft 21, which further comprises a pivot 27 supported by a bearing in a bridge 28.
  • the star 26 serves as a locking member for a gear train. stopping 30 driven by the first medium wheel 13. Indeed, it meshes with a pinion 31 of a shaft 32 rotatably mounted in the bridges 18 and 28 and provided with a wheel 33 above the
  • the stop gear 30 terminates with a stop wheel 35 driven by the wheel 33 through a deflection wheel 34 to rotate in the opposite direction to the star.
  • the wheels 34 and 35 are supported by the bridge 28.
  • the wheel 35 is provided with an off-center finger 36 which abuts successively against each branch of the star 26 during the rotation thereof, as the whip of the devices of the prior art. As long as the star thus prevents the rotation of the wheel 35 and thus the stop gear 30, the rotation of the first medium wheel 13 and all the previous wheel is stopped.
  • the second average wheel 20 meshes with a second gear 38 which is one revolution per minute and which, in the present example, is attached to the cage 41 of a vortex 40 which conventionally contains the escapement and the oscillator mechanical balancer-balance, which we see the balance 42 centered on the axis of rotation 44 of the cage 41.
  • This can carry a second hand 45, as shown schematically in Figure 1.
  • the teeth of the pinion seconds 38 and the second average wheel 20 are dimensioned so that the wheel 20 and the star 26 take a turn in eight minutes.
  • the relative positions of the plate 16 and the wheel 20 are fixed by means of the stop gear 30 so that the spiral spring 22 is preloaded with the desired torque to operate from optimally the watch movement regulating member, in this case the tourbillon 40.
  • the spring 22 preferably has several turns, so that the torque that it transmits from the mobile 12 to the wheel 20 does not vary substantially while this wheel performs one eighth of a turn while the plate 16 is stopped.
  • the rotations of the elements of the movement 1 are effected in the directions indicated by arrows in FIG. 1.
  • the rate of rotation is that of the escape wheel contained in the vortex, for example six steps per second if the oscillation frequency of the balance 42 is 3 Hz.
  • Upstream of the constant-force device intermittent rotations occur at one step per minute for the following reasons.
  • the average wheel 12 remains locked and immobilizes all the wheelwork upstream, including the display by the hands. 7 and 9.
  • the exhaust loaded by the spring 22 maintains the oscillation of the balance 42 and allows the second average wheel 20 and its star 26 to rotate at the speed of one eighth of a revolution per minute.
  • the finger 36 pressed against the branch 25 of the star ends up being released, which allows the stop wheel 35, driven from the barrel 2, to turn quickly until the finger 36 it is stopped by the next branch of the star 26.
  • this rotation allows the mobile of average 12 to turn quickly one eighth of a turn and catch up and the second average wheel 20 by resetting the spring 22.
  • the almost instantaneous rotation of the average mobile 12 allows a rotation of one-sixtieth of a turn of the center wheel 6, so also of the floor and the minute hand 7 All these elements are then immobilized for one minute by the star 26.
  • the number of branches of the star 26 could be different from eight if the transmission ratio between the second average wheel 20 and the second gear 38 is different.
  • the star is not necessarily secured to the wheel 20, to which it could be connected by meshing to be placed next to and cooperate with a finger placed on the wheel 33, for example.
  • Another variant could include more than one finger 36 on the stop wheel 35, which would be only a fraction of a turn every minute.
  • the invention is applicable without difficulty to a movement of the type where the roadway is not carried by the center wheel 6, but by a wheel driven by the average gear, as is the usual practice. with a tree of the second central.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Vehicle Body Suspensions (AREA)
  • Body Structure For Vehicles (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

The watch has a movement (1) with a constant force device (14) comprising a mobile, a third wheel (20), a spiral spring (22) rotatively connecting the mobile to the wheel and a stop gear-train (30). The wheel (20) is integrated to a star (26) which frees the gear-train only once per minute so as to carry out a display at dead minute in order that a minute hand (7) effectuates a jump at each minute. The star acts as a locking unit for the gear-train that is driven by a third wheel (13).

Description

ArriĆØre-plan de l'inventionBackground of the invention

La prƩsente invention concerne une montre Ơ mouvement mƩcanique dont l'Ʃchappement est entraƮnƩ Ơ travers un dispositif Ơ force constante.The present invention relates to a mechanical movement watch whose escapement is driven through a constant force device.

Dans l'horlogerie mĆ©canique, l'expression Ā« dispositif Ć  force constante Ā» est utilisĆ©e depuis plus d'un siĆØcle pour dĆ©signer un organe interposĆ© dans le rouage reliant le ressort moteur Ć  l'Ć©chappement et comportant un ressort intermĆ©diaire chargĆ© en permanence, afin de transmettre Ć  l'Ć©chappement un couple relativement constant, correspondant Ć  la tension du ressort intermĆ©diaire. Cette tension oscille quelque peu, mais dans une faible marge et sa valeur moyenne reste constante au fil des heures. Ainsi, les variations de l'Ć©tat d'armage du ressort moteur ne font pas varier les forces appliquĆ©es Ć  l'oscillateur mĆ©canique, dont l'amplitude et la frĆ©quence sont alors plus stables.In mechanical watchmaking, the term "constant force device" has been used for more than a century to designate a member interposed in the gear train connecting the mainspring to the exhaust and comprising a permanently loaded intermediate spring, in order to to transmit a relatively constant torque to the escapement, corresponding to the tension of the intermediate spring. This tension oscillates somewhat, but in a small margin and its average value remains constant over the hours. Thus, the variations in the state of armature of the mainspring do not vary the forces applied to the mechanical oscillator, whose amplitude and frequency are then more stable.

Le dispositif Ć  force constante effectue un blocage temporaire de la partie du rouage situĆ©e en amont, puis un dĆ©blocage pĆ©riodique qui permet de retendre le ressort intermĆ©diaire. En gĆ©nĆ©ral, la cadence de dĆ©blocage est d'une fois par seconde et cela permet de faire sauter Ć  ce rythme une aiguille indicatrice des secondes, appelĆ©e couramment Ā« seconde morte Ā». Les dispositifs Ć  force constante sont donc presque toujours combinĆ©s Ć  la roue des secondes, avec un affichage Ć  seconde morte. DiffĆ©rents exemples de telles combinaisons et leur fonctionnement sont dĆ©crits dans les publications de brevets CH 47 297 , CH 98 828 , CH 120 028 , EP 1 319 997 et EP 1 528 443 . La derniĆØre publication citĆ©e prĆ©voit en outre que l'organe rĆ©gulateur entraĆ®nĆ© par le dispositif Ć  force constante peut ĆŖtre un tourbillon, lequel est solidaire de la roue de sortie du dispositif Ć  force constante.The constant force device temporarily blocks the part of the wheel train upstream, then a periodic release that retension the intermediate spring. In general, the rate of deblocking is once per second and this makes it possible to blow at this rate a second indicator hand, commonly called "second dead". Constant force devices are thus almost always combined with the seconds wheel, with a second dead display. Various examples of such combinations and their operation are described in patent publications CH 47 297 , CH 98 828 , CH 120 028 , EP 1 319 997 and EP 1,528,443 . The last cited publication further provides that the regulator member driven by the constant force device may be a vortex, which is integral with the output wheel of the constant force device.

Le mĆ©canisme d'arrĆŖt et dĆ©blocage pĆ©riodique du dispositif Ć  seconde morte doit ĆŖtre commandĆ© Ć  partir de la roue qui suit la roue des secondes, donc la roue d'Ć©chappement. Le premier organe subissant le blocage est gĆ©nĆ©ralement appelĆ© Ā« fouet Ā», parce qu'Ć  l'instant oĆ¹ il est libĆ©rĆ©, il effectue une rotation trĆØs rapide sur un tour complet ou une fraction de tour, jusqu'Ć  ce qu'il soit Ć  nouveau bloquĆ©. L'Ć©lĆ©ment qui bloque le fouet est gĆ©nĆ©ralement une Ć©toile Ć  N branches, faisant un tour en N secondes afin de libĆ©rer le fouet une fois par seconde. Typiquement, comme le montre le brevet CH 47 297 , cette Ć©toile est solidaire de la roue d'Ć©chappement, car celle-ci tourne Ć  une vitesse (un tour en six secondes) qui correspond Ć  un nombre de branches acceptable de l'Ć©toile. La rotation instantanĆ©e et l'arrĆŖt brusque consĆ©cutif sont accompagnĆ©s par tout le rouage situĆ© en amont et par les organes d'affichage liĆ©s Ć  celui-ci. L'inertie de ces Ć©lĆ©ments fait que le mĆ©canisme d'arrĆŖt transmet des chocs non nĆ©gligeables Ć  l'Ć©chappement via l'Ć©toile. On perd ainsi une part substantielle des avantages dus Ć  une force constante d'entraĆ®nement de l'Ć©chappement.The mechanism for stopping and releasing the dead-second device periodically must be controlled from the wheel that follows the seconds wheel, and therefore the escape wheel. The first organ undergoing blockage is usually called a "whip", because at the moment it is released, it performs a very fast rotation over a complete revolution or a fraction of a turn, until it is again blocked. The element that blocks the whip is usually an N-shaped star, making a turn in N seconds to release the whip once a second. Typically, as shown in the patent CH 47 297 , this star is integral with the escape wheel, because it runs at a speed (one turn in six seconds) which corresponds to an acceptable number of branches of the star. Instant rotation and consecutive sudden stop are accompanied by all the gear located upstream and by the display members associated therewith. The inertia of these elements means that the stop mechanism transmits significant shocks to the exhaust via the star. In this way, a substantial part of the advantages due to a constant driving force of the escapement are lost.

RƩsumƩ de l'inventionSummary of the invention

La prƩsente invention vise Ơ Ʃviter les inconvƩnients susmentionnƩs de l'art antƩrieur, en dotant un mouvement de montre d'un dispositif Ơ force constante dont les mouvements instantanƩs perturbent le moins possible les conditions de fonctionnement de l'Ʃchappement et de l'oscillateur mƩcanique. Un but additionnel est de pouvoir entraƮner un tourbillon dans de bonnes conditions avec un tel dispositif Ơ force constante.The present invention aims at avoiding the above-mentioned drawbacks of the prior art by providing a watch movement with a constant-force device whose instantaneous movements disturb as little as possible the operating conditions of the escapement and the mechanical oscillator. . An additional object is to be able to drive a vortex in good conditions with such a constant-force device.

Dans ce but, l'invention concerne une montre dont le mouvement comporte un dispositif Ć  force constante interposĆ© dans un rouage de finissage reliant un barillet Ć  ressort Ć  un Ć©chappement, ce rouage comportant un mobile de moyenne qui fait un tour en plusieurs minutes et entraĆ®ne un pignon de secondes faisant un tour par minute, le dispositif Ć  force constante comprenant un Ć©lĆ©ment d'entrĆ©e, un Ć©lĆ©ment de sortie coaxial Ć  l'Ć©lĆ©ment d'entrĆ©e et reliĆ© mĆ©caniquement Ć  une Ć©toile Ć  plusieurs branches, un ressort spiral reliant Ć©lastiquement en rotation l'Ć©lĆ©ment d'entrĆ©e Ć  l'Ć©lĆ©ment de sortie, et un rouage d'arrĆŖt engrenĆ© avec l'Ć©lĆ©ment d'entrĆ©e et pourvu d'une roue d'arrĆŖt ayant au moins un doigt agencĆ© pour buter contre une branche de ladite Ć©toile, la montre Ć©tant caractĆ©risĆ©e en ce que l'Ć©lĆ©ment d'entrĆ©e du dispositif Ć  force constante est le mobile de moyenne, l'Ć©lĆ©ment de sortie dudit dispositif Ć©tant une seconde roue moyenne reliĆ©e par engrĆØnement au pignon des secondes.For this purpose, the invention relates to a watch whose movement comprises a constant force device interposed in a work train connecting a spring barrel to an exhaust, the wheel having an average wheel which turns in several minutes and causes a one-second spinning gear per minute, the constant-force device comprising an input member, an output member coaxial with the input member and mechanically connected to a multi-limbed star, a spiral spring resiliently interconnecting rotating the input member to the output member, and a stop gear meshing with the input member and provided with a stop wheel having at least one finger arranged to abut against a branch of said star, the watch being characterized in that the input element of the constant-force device is the moving average, the output element of said device being a second average wheel connected by meshing with the pinion of seconds.

Ainsi, les chocs causĆ©s par le fouet constituĆ© par le doigt du rouage d'arrĆŖt, lorsqu'il bute contre l'Ć©toile, ne se rĆ©percutent pratiquement pas dans l'Ć©chappement, car il existe un engrenage Ć  fort rapport de multiplication entre l'Ć©lĆ©ment de sortie du dispositif Ć  force constante et la roue d'Ć©chappement, avec un mobile intermĆ©diaire qui est le mobile des secondes. L'Ć©chappement reƧoit donc un couple moteur aussi constant que possible.Thus, the shocks caused by the whip formed by the finger of the stop train, when it abuts against the star, do not substantially affect the exhaust, because there is a gear with a high multiplication ratio between the output element of the constant force device and the escape wheel, with an intermediate mobile which is the mobile seconds. The exhaust thus receives a motor torque as constant as possible.

Selon un mode de rĆ©alisation prĆ©fĆ©rĆ© de l'invention, la montre comporte un affichage dit Ć  minute morte, par une aiguille des minutes entraĆ®nĆ©e par le rouage de finissage, le nombre de branches de l'Ć©toile Ć©tant Ć©gal au nombre de minutes durant lesquelles l'Ć©toile fait un tour, de sorte que la rotation de l'Ć©toile libĆØre le rouage d'arrĆŖt, le mobile de moyenne et l'aiguille des minutes une fois par minute. Le fait que l'aiguille des minutes saute ainsi d'une division Ć  la suivante sur l'Ć©chelle des minutes du cadran de la montre procure un effet visuel inĆ©dit et facilite la lecture de l'heure.According to a preferred embodiment of the invention, the watch comprises a display said dead minute, by a minute hand driven by the finishing train, the number of branches of the star being equal to the number of minutes during which the The star makes a turn, so that the rotation of the star releases the cogwheel, the moving average and the minute hand once a minute. The fact that the minute hand jumps from one division to the next on the minute scale of the watch dial provides an unprecedented visual effect and makes it easier to read the time.

On notera Ć©galement que dans le cas oĆ¹ la montre comprend un mĆ©canisme de tourbillon, l'arrangement de l'invention du dispositif sur la minute permet de le disposer aisĆ©ment Ć  l'extĆ©rieur du mĆ©canisme de tourbillon,Note also that in the case where the watch comprises a vortex mechanism, the arrangement of the invention of the device on the minute makes it easy to arrange it outside the vortex mechanism,

Description sommaire des dessinsBrief description of the drawings

D'autres caractƩristiques et avantages de la prƩsente invention ressortiront de la description suivante, qui prƩsente un mode de rƩalisation avantageux Ơ titre d'exemple non limitatif en se rƩfƩrant aux dessins annexƩs, dans lesquels :

  • la figure 1 reprĆ©sente les principaux Ć©lĆ©ments d'un mouvement de montre pourvu d'un tourbillon et d'un dispositif Ć  force constante selon l'invention, en vue de dessus, avec une reprĆ©sentation schĆ©matique des aiguilles affichant le temps,
  • la figure 2 est une vue de dessous du mouvement reprĆ©sentĆ© en figure 1,
  • la figure 3 est une vue Ć©clatĆ©e du dispositif Ć  force constante, et
  • la figure 4 est une vue en perspective du dispositif Ć  force constante, sans les ponts qui le supportent.
Other features and advantages of the present invention will emerge from the following description, which shows an advantageous embodiment by way of non-limiting example with reference to the appended drawings, in which:
  • FIG. 1 represents the main elements of a watch movement provided with a tourbillon and a constant force device according to the invention, seen from above, with a schematic representation of the hands displaying the time,
  • FIG. 2 is a bottom view of the movement represented in FIG. 1,
  • FIG. 3 is an exploded view of the constant-force device, and
  • Figure 4 is a perspective view of the constant force device, without the bridges that support it.

Description dƩtaillƩe d'un mode de rƩalisationDetailed description of an embodiment

Dans le mouvement de montre 1 reprĆ©sentĆ© de maniĆØre simplifiĆ©e dans les figures 1 et 2, un barillet 2 Ć  ressort entraĆ®ne en rotation le pignon 3 d'une roue intermĆ©diaire 4, dite roue de huitaine, qui s'engrĆØne avec le pignon de centre 5 d'une roue de centre 6 faisant un tour par heure. La prĆ©sence de la roue intermĆ©diaire 4 dans cet exemple n'est pas liĆ©e directement Ć  l'invention ; elle est due au fait que le mouvement 1 comporte plusieurs complications non reprĆ©sentĆ©es devant ĆŖtre entraĆ®nĆ©es par le barillet 2, lequel est pourvu d'un ressort plus long et tourne plus vite que les barillets ordinaires. Le remontage du ressort de barillet peut ĆŖtre manuel ou automatique. Comme dans un mouvement classique, une chaussĆ©e portant une aiguille des minutes 7 est montĆ©e Ć  friction sur l'arbre 8 de la roue de centre 6 et supporte de maniĆØre rotative une roue des heures portant une aiguille des heures 9. Pour des raisons de clartĆ©, seules les aiguilles de ce dispositif d'affichage de l'heure sont reprĆ©sentĆ©es dans les dessins, et ceci de faƧon trĆØs schĆ©matique.In the watch movement 1 shown in a simplified manner in FIGS. 1 and 2, a spring-loaded barrel 2 rotates the pinion 3 of an intermediate wheel 4, called the eight-wheel, which meshes with the center pinion 5. a center wheel 6 making one turn per hour. The presence of the intermediate wheel 4 in this example is not directly related to the invention; it is due to the fact that the movement 1 comprises several unrepresented complications to be driven by the barrel 2, which is provided with a longer spring and rotates faster than ordinary barrels. The winding of the mainspring can be manual or automatic. As in a conventional movement, a roadway carrying a minute hand 7 is frictionally mounted on the shaft 8 of the center wheel 6 and rotatably supports a hour wheel carrying a 9 hour hand. For the sake of clarity , only the hands of this time display device are shown in the drawings, and this very schematically.

La roue de centre 6 s'engrĆØne sur le pignon 11 d'un mobile de moyenne 12 comprenant une premiĆØre roue moyenne 13. Le mobile 12 est associĆ© au dispositif Ć  force constante 14 reprĆ©sentĆ© en dĆ©tail dans les figures 3 et 4. Le mobile 12, ayant un axe de rotation 15, comprend en outre un plateau 16 ayant un court arbre tubulaire (non visible dans les dessins) qui est montĆ© par un palier 17 dans un pont 18 et chassĆ© dans le trou central de la roue 13. Le mobile 12, Ć©tant entraĆ®nĆ© par le couple moteur fourni par le barillet 2, forme l'Ć©lĆ©ment d'entrĆ©e du dispositif Ć  force constante 14. Une seconde roue moyenne 20, formant l'Ć©lĆ©ment de sortie du dispositif Ć  force constante 14, est coaxiale Ć  la premiĆØre roue moyenne 13, cette roue 20 Ć©tant fixĆ©e sur un arbre 21 montĆ© de maniĆØre rotative au centre du mobile 12. Un ressort spiral 22 est placĆ© entre le plateau 16 et la roue 20, qu'il relie l'un Ć  l'autre en rotation de maniĆØre Ć©lastique, l'extrĆ©mitĆ© intĆ©rieure du ressort Ć©tant fixĆ©e dans un trou 24 d'une branche de la roue 20, tandis que l'extrĆ©mitĆ© extĆ©rieure du ressort est fixĆ©e au plateau 16.The center wheel 6 meshes with the pinion 11 of a mobile of average 12 comprising a first average wheel 13. The mobile 12 is associated with the constant-force device 14 shown in detail in FIGS. 3 and 4. The mobile 12 , having an axis of rotation 15, further comprises a plate 16 having a short tubular shaft (not visible in the drawings) which is mounted by a bearing 17 in a bridge 18 and driven into the central hole of the wheel 13. The mobile 12, being driven by the couple motor provided by the barrel 2, forms the input element of the constant-force device 14. A second average wheel 20, forming the output element of the constant-force device 14, is coaxial with the first average wheel 13, this wheel 20 being fixed on a shaft 21 rotatably mounted at the center of the mobile 12. A spiral spring 22 is placed between the plate 16 and the wheel 20, which connects one to the other in rotation in an elastic manner, the inner end of the spring being fixed in a hole 24 of a branch of the wheel 20, while the outer end of the spring is fixed to the plate 16.

Une Ć©toile 26 Ć  huit branches 25 est fixĆ©e Ć  l'extrĆ©mitĆ© supĆ©rieure de l'arbre 21, qui comporte en outre un pivot 27 supportĆ© par un palier dans un pont 28. L'Ć©toile 26 sert d'organe de blocage pour un rouage d'arrĆŖt 30 entraĆ®nĆ© par la premiĆØre roue moyenne 13. En effet, celle-ci s'engrĆØne sur un pignon 31 d'un arbre 32 montĆ© de maniĆØre rotative dans les ponts 18 et 28 et muni d'une roue 33 au-dessus du niveau de la roue 20. Le rouage d'arrĆŖt 30 se termine par une roue d'arrĆŖt 35 entraĆ®nĆ©e par la roue 33 par l'entremise d'une roue de renvoi 34 afin de tourner dans le sens opposĆ© Ć  l'Ć©toile. Les roues 34 et 35 sont supportĆ©es par le pont 28. La roue 35 est munie d'un doigt dĆ©centrĆ© 36 qui bute successivement contre chaque branche de l'Ć©toile 26 pendant la rotation de celle-ci, comme le fouet des dispositifs de l'art antĆ©rieur. Tant que l'Ć©toile empĆŖche ainsi la rotation de la roue 35 et donc du rouage d'arrĆŖt 30, la rotation de la premiĆØre roue moyenne 13 et de tout le rouage prĆ©cĆ©dent est arrĆŖtĆ©e.An eight-pointed star 26 is attached to the upper end of the shaft 21, which further comprises a pivot 27 supported by a bearing in a bridge 28. The star 26 serves as a locking member for a gear train. stopping 30 driven by the first medium wheel 13. Indeed, it meshes with a pinion 31 of a shaft 32 rotatably mounted in the bridges 18 and 28 and provided with a wheel 33 above the The stop gear 30 terminates with a stop wheel 35 driven by the wheel 33 through a deflection wheel 34 to rotate in the opposite direction to the star. The wheels 34 and 35 are supported by the bridge 28. The wheel 35 is provided with an off-center finger 36 which abuts successively against each branch of the star 26 during the rotation thereof, as the whip of the devices of the prior art. As long as the star thus prevents the rotation of the wheel 35 and thus the stop gear 30, the rotation of the first medium wheel 13 and all the previous wheel is stopped.

La seconde roue moyenne 20 s'engrĆØne sur un pignon de secondes 38 qui fait un tour par minute et qui, dans le prĆ©sent exemple, est fixĆ© Ć  la cage 41 d'un tourbillon 40 contenant de maniĆØre classique l'Ć©chappement et l'oscillateur mĆ©canique Ć  balancier-spiral, dont on voit le balancier 42 centrĆ© sur l'axe de rotation 44 de la cage 41. Celle-ci peut porter une aiguille des secondes 45, comme le montre schĆ©matiquement la figure 1. Les dentures du pignon de secondes 38 et de la seconde roue moyenne 20 sont dimensionnĆ©es de faƧon que la roue 20 et l'Ć©toile 26 fassent un tour en huit minutes.The second average wheel 20 meshes with a second gear 38 which is one revolution per minute and which, in the present example, is attached to the cage 41 of a vortex 40 which conventionally contains the escapement and the oscillator mechanical balancer-balance, which we see the balance 42 centered on the axis of rotation 44 of the cage 41. This can carry a second hand 45, as shown schematically in Figure 1. The teeth of the pinion seconds 38 and the second average wheel 20 are dimensioned so that the wheel 20 and the star 26 take a turn in eight minutes.

Lors de l'assemblage du dispositif Ć  force constante 14, les positions relatives du plateau 16 et de la roue 20 sont fixĆ©es au moyen du rouage d'arrĆŖt 30 de faƧon que le ressort spiral 22 soit prĆ©chargĆ© avec le couple souhaitĆ© pour faire fonctionner de maniĆØre optimale l'organe rĆ©gulateur du mouvement de montre, en l'occurrence le tourbillon 40. Le ressort 22 a de prĆ©fĆ©rence plusieurs spires, afin que le couple qu'il transmet du mobile 12 Ć  la roue 20 ne varie pas sensiblement pendant que cette roue effectue un huitiĆØme de tour alors que le plateau 16 est arrĆŖtĆ©.During the assembly of the constant force device 14, the relative positions of the plate 16 and the wheel 20 are fixed by means of the stop gear 30 so that the spiral spring 22 is preloaded with the desired torque to operate from optimally the watch movement regulating member, in this case the tourbillon 40. The spring 22 preferably has several turns, so that the torque that it transmits from the mobile 12 to the wheel 20 does not vary substantially while this wheel performs one eighth of a turn while the plate 16 is stopped.

En fonctionnement, les rotations des Ć©lĆ©ments du mouvement 1 s'effectuent dans les directions indiquĆ©es par des flĆØches dans la figure 1. Du cĆ“tĆ© aval du dispositif Ć  force constante 14, la cadence des rotations est celle de la roue d'Ć©chappement contenue dans le tourbillon, par exemple six pas par seconde si la frĆ©quence d'oscillation du balancier 42 est de 3 Hz. En amont du dispositif Ć  force constante, les rotations intermittentes s'effectuent Ć  raison d'un pas par minute, pour les raisons suivantes.In operation, the rotations of the elements of the movement 1 are effected in the directions indicated by arrows in FIG. 1. On the downstream side of the constant force device 14, the rate of rotation is that of the escape wheel contained in the vortex, for example six steps per second if the oscillation frequency of the balance 42 is 3 Hz. Upstream of the constant-force device intermittent rotations occur at one step per minute for the following reasons.

Tant que la branche 25 (voir figure 4) de l'Ć©toile 26 retient le doigt 36 du rouage d'arrĆŖt 30, le mobile de moyenne 12 reste bloquĆ© et immobilise tout le rouage situĆ© en amont, y compris l'affichage par les aiguilles 7 et 9. Pendant cette phase, l^Ć©chappement chargĆ© par le ressort 22 entretient l'oscillation du balancier 42 et laisse tourner la seconde roue moyenne 20 et son Ć©toile 26 Ć  la vitesse d'un huitiĆØme de tour par minute. Par cette rotation, le doigt 36 appuyĆ© contre la branche 25 de l'Ć©toile finit par ĆŖtre libĆ©rĆ©, ce qui permet Ć  la roue d'arrĆŖt 35, entraĆ®nĆ©e Ć  partir du barillet 2, de tourner rapidement jusqu'Ć  ce que le doigt 36 soit arrĆŖtĆ© par la branche suivante de l'Ć©toile 26. A travers le rouage d'arrĆŖt 30 ayant un rapport de dĆ©multiplication de 1 :8, cette rotation permet au mobile de moyenne 12 de tourner rapidement d'un huitiĆØme de tour et de rattraper ainsi la seconde roue moyenne 20 en rĆ©armant le ressort 22. La rotation quasi instantanĆ©e du mobile de moyenne 12 permet une rotation d'un soixantiĆØme de tour de la roue de centre 6, donc aussi de la chaussĆ©e et de l'aiguille des minutes 7. Tous ces Ć©lĆ©ments sont ensuite immobilisĆ©s durant une minute par l'Ć©toile 26.As long as the branch 25 (see FIG. 4) of the star 26 retains the finger 36 of the stop train 30, the average wheel 12 remains locked and immobilizes all the wheelwork upstream, including the display by the hands. 7 and 9. During this phase, the exhaust loaded by the spring 22 maintains the oscillation of the balance 42 and allows the second average wheel 20 and its star 26 to rotate at the speed of one eighth of a revolution per minute. By this rotation, the finger 36 pressed against the branch 25 of the star ends up being released, which allows the stop wheel 35, driven from the barrel 2, to turn quickly until the finger 36 it is stopped by the next branch of the star 26. Through the stop gear 30 having a reduction ratio of 1: 8, this rotation allows the mobile of average 12 to turn quickly one eighth of a turn and catch up and the second average wheel 20 by resetting the spring 22. The almost instantaneous rotation of the average mobile 12 allows a rotation of one-sixtieth of a turn of the center wheel 6, so also of the floor and the minute hand 7 All these elements are then immobilized for one minute by the star 26.

La construction dĆ©crite ci-dessus et reprĆ©sentĆ©e dans les dessins n'est qu'un exemple parmi d'autres modes de rĆ©alisation possibles de l'invention. En particulier, le nombre de branches de l'Ć©toile 26 pourrait diffĆ©rent de huit si le rapport de transmission entre la seconde roue moyenne 20 et le pignon des secondes 38 est diffĆ©rent. En outre, l'Ć©toile n'est pas obligatoirement solidaire de la roue 20, Ć  laquelle elle pourrait ĆŖtre reliĆ©e par engrĆØnement pour ĆŖtre placĆ©e Ć  cĆ“tĆ© et coopĆ©rer avec un doigt placĆ© sur la roue 33, par exemple. Une autre variante pourrait comporter plus d'un doigt 36 sur la roue d'arrĆŖt 35, laquelle ne ferait qu'une fraction de tour chaque minute. Il faut aussi mentionner que l'invention est applicable sans difficultĆ©s Ć  un mouvement du type oĆ¹ la chaussĆ©e n'est pas portĆ©e par la roue de centre 6, mais par une roue entraĆ®nĆ©e par le pignon de moyenne, comme c'est l'usage avec un arbre des seconde centrale.The construction described above and shown in the drawings is only one of a number of other possible embodiments of the invention. In particular, the number of branches of the star 26 could be different from eight if the transmission ratio between the second average wheel 20 and the second gear 38 is different. In addition, the star is not necessarily secured to the wheel 20, to which it could be connected by meshing to be placed next to and cooperate with a finger placed on the wheel 33, for example. Another variant could include more than one finger 36 on the stop wheel 35, which would be only a fraction of a turn every minute. It should also be mentioned that the invention is applicable without difficulty to a movement of the type where the roadway is not carried by the center wheel 6, but by a wheel driven by the average gear, as is the usual practice. with a tree of the second central.

Claims (6)

Montre dont le mouvement comporte un dispositif Ć  force constante (14) interposĆ© dans un rouage de finissage reliant un barillet Ć  ressort (2) Ć  un Ć©chappement et comportant un mobile de moyenne (12) qui fait un tour en plusieurs minutes et entraĆ®ne un pignon de secondes (38) faisant un tour par minute, le dispositif Ć  force constante (14) comprenant un Ć©lĆ©ment d'entrĆ©e (12), un Ć©lĆ©ment de sortie (20) coaxial Ć  l'Ć©lĆ©ment d'entrĆ©e et reliĆ© mĆ©caniquement Ć  une Ć©toile (26) Ć  plusieurs branches, un ressort spiral (22) reliant Ć©lastiquement en rotation l'Ć©lĆ©ment d'entrĆ©e (12) Ć  l'Ć©lĆ©ment de sortie (20), et un rouage d'arrĆŖt (30) engrenĆ© avec l'Ć©lĆ©ment d'entrĆ©e et pourvu d'une roue d'arrĆŖt (35) ayant au moins un doigt (36) agencĆ© pour buter contre une branche de ladite Ć©toile (36),
caractĆ©risĆ©e en ce que l'Ć©lĆ©ment d'entrĆ©e du dispositif Ć  force constante (14) est le mobile de moyenne (12), l'Ć©lĆ©ment de sortie dudit dispositif (14) Ć©tant une seconde roue moyenne (20) reliĆ©e par engrĆØnement au pignon de secondes (38).Watch whose movement comprises a device with constant force (14) interposed in a work train connecting a spring barrel (2) to an exhaust and having a moving average (12) which turns in several minutes and drives a pinion of seconds (38) making one revolution per minute, the constant force device (14) comprising an input element (12), an output element (20) coaxial with the input element and mechanically connected to a star (26) with a plurality of branches, a spiral spring (22) elastically connecting the input element (12) to the output element (20) in rotation and a gear train (30) meshing with the element input and provided with a stop wheel (35) having at least one finger (36) arranged to abut against a branch of said star (36),
characterized in that the input member of the constant force device (14) is the average moving member (12), the output member of said device (14) being a second average wheel (20) connected by meshing with the pinion seconds (38). Montre selon la revendication 1, caractĆ©risĆ©e en ce qu'elle comporte un affichage Ć  minute morte par une aiguille des minutes (7) entraĆ®nĆ©e par le rouage de finissage, le nombre des branches (25) de l'Ć©toile (26) Ć©tant Ć©gal au nombre de minutes durant lesquelles l'Ć©toile fait un tour, de sorte que la rotation de l'Ć©toile libĆØre le rouage d'arrĆŖt (30) et le mobile de moyenne (12) une fois par minute.Watch according to claim 1, characterized in that it comprises a dead-minute display by a minute hand (7) driven by the finishing train, the number of branches (25) of the star (26) being equal to number of minutes during which the star makes a turn, so that the rotation of the star releases the cogwheel (30) and the moving average (12) once per minute. Montre selon la revendication 1 ou 2, caractĆ©risĆ©e en ce que l'Ć©toile (26) est solidaire de la seconde roue moyenne (20).Watch according to claim 1 or 2, characterized in that the star (26) is integral with the second medium wheel (20). Montre selon la revendication 3, caractĆ©risĆ©e en ce que le rouage d'arrĆŖt (30) comporte un arbre (32) parallĆØle Ć  l'axe de rotation (15) du mobile de moyenne (12) et ayant un pignon (31) engrenĆ© sur une premiĆØre roue moyenne (13) dudit mobile (12), ledit arbre Ć©tant muni d'une roue (33) reliĆ©e par engrĆØnement Ć  la roue d'arrĆŖt (35) via une roue de renvoi (34).Watch according to claim 3, characterized in that the stop gear (30) comprises a shaft (32) parallel to the axis of rotation (15) of the average wheel (12) and having a gear (31) geared on a first medium wheel (13) of said mobile (12), said shaft being provided with a wheel (33) connected by meshing with the stop wheel (35) via a return wheel (34). Montre selon la revendication 4, caractĆ©risĆ©e en ce que le mobile de moyenne (12) comprend un plateau (16), auquel est fixĆ©e une extrĆ©mitĆ© dudit ressort spiral (22), et est supportĆ© au moyen d'un pont (18) situĆ© entre ledit plateau (16) et la premiĆØre roue moyenne (13).Watch according to claim 4, characterized in that the average wheel (12) comprises a plate (16), to which is fixed an end of said spiral spring (22), and is supported by means of a bridge (18) located between said plate (16) and the first middle wheel (13). Montre selon l'une des revendications prĆ©cĆ©dentes, caractĆ©risĆ©e en ce que le pignon de secondes (38) est solidaire de la cage (41) d'un tourbillon (40) dans lequel se trouve l'Ć©chappement.Watch according to one of the preceding claims, characterized in that the second pinion (38) is integral with the cage (41) of a vortex (40) in which the exhaust is located.
EP05022045A 2005-10-10 2005-10-10 Watch movement with constant-force device Active EP1772783B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT05022045T ATE471538T1 (en) 2005-10-10 2005-10-10 CLOCK MOVEMENT WITH CONSTANT FORCE DEVICE
EP05022045A EP1772783B1 (en) 2005-10-10 2005-10-10 Watch movement with constant-force device
DE602005021883T DE602005021883D1 (en) 2005-10-10 2005-10-10 Movement with constant force device
SG200606730-0A SG131854A1 (en) 2005-10-10 2006-09-27 Watch whose movement includes a constant force device
CN2006101495365A CN1949101B (en) 2005-10-10 2006-10-09 Watch core including a constant force device
JP2006276132A JP5032086B2 (en) 2005-10-10 2006-10-10 Watch with a constant force device in the movement
US11/548,261 US7473027B2 (en) 2005-10-10 2006-10-10 Watch whose movement includes a constant force device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05022045A EP1772783B1 (en) 2005-10-10 2005-10-10 Watch movement with constant-force device

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EP1772783A1 true EP1772783A1 (en) 2007-04-11
EP1772783B1 EP1772783B1 (en) 2010-06-16

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US (1) US7473027B2 (en)
EP (1) EP1772783B1 (en)
JP (1) JP5032086B2 (en)
CN (1) CN1949101B (en)
AT (1) ATE471538T1 (en)
DE (1) DE602005021883D1 (en)
SG (1) SG131854A1 (en)

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EP2034374A3 (en) * 2007-09-07 2009-07-15 Lange Uhren GmbH Clock
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EP2034374A2 (en) 2007-09-07 2009-03-11 Lange Uhren GmbH Clock
WO2009059441A1 (en) * 2007-11-09 2009-05-14 Eterna Ag Uhrenfabrik Mechanical watch having constant spring force
US8550701B2 (en) 2007-11-09 2013-10-08 Eterna Ag Uhrenfabrik Mechanical watch having constant spring force
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CN102269967A (en) * 2010-06-07 2011-12-07 å¤©ę“„ęµ·éø„č”Øäøšé›†å›¢ęœ‰é™å…¬åø Constant force device of watch
EP2397920A1 (en) 2010-06-17 2011-12-21 Blancpain S.A. Mechanism for a jumping tourbillon or karussel cage
WO2011157591A1 (en) 2010-06-17 2011-12-22 Blancpain Sa Mechanism for advancing a karrusel cage by periodic jumps
WO2011157797A1 (en) 2010-06-17 2011-12-22 Blancpain Sa Mechanism for advancing a tourbillon cage or a karrusel cage by periodic jumps
EP2397921A1 (en) 2010-06-17 2011-12-21 Blancpain S.A. Mechanism for a jumping tourbillon cage
US9052692B2 (en) 2010-06-17 2015-06-09 Blancpain S.A. Mechanism for advancing a karussel cage or tourbillon cage by periodic jumps
US9058020B2 (en) 2010-06-17 2015-06-16 Blancpain Sa Mechanism for advancing a karussel cage by periodic jumps
CN104423241A (en) * 2013-09-04 2015-03-18 ē²¾å·„ē”µå­ęœ‰é™å…¬åø Operation stabilization mechanism, movement, and mechanical timepiece
CN104423241B (en) * 2013-09-04 2018-05-04 ē²¾å·„ē”µå­ęœ‰é™å…¬åø Having stable behavior mechanism, movement and mechanical clock
EP3032349A1 (en) * 2014-12-11 2016-06-15 Blancpain SA. Drive mechanism of a skipping member
EP3032348A1 (en) * 2014-12-11 2016-06-15 Blancpain SA. Drive mechanism of a skipping member
US9429914B2 (en) 2014-12-11 2016-08-30 Blancpain Sa Mechanism for driving a jumping element
RU2739148C2 (en) * 2014-12-11 2020-12-21 Š‘Š»Š°Š½ŠæэŠ½ Š”Š° Mechanism for activation of slipping element
EP3339974A1 (en) * 2016-12-22 2018-06-27 Montres Breguet S.A. Mechanism for clearance compensation between a first kinematic chain and a second kinematic chain of a clockwork mechanism

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US7473027B2 (en) 2009-01-06
DE602005021883D1 (en) 2010-07-29
JP5032086B2 (en) 2012-09-26
CN1949101B (en) 2011-10-12
ATE471538T1 (en) 2010-07-15
CN1949101A (en) 2007-04-18
SG131854A1 (en) 2007-05-28
JP2007108177A (en) 2007-04-26
US20070127319A1 (en) 2007-06-07
EP1772783B1 (en) 2010-06-16

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