CH707593B1

CH707593B1 - Timepiece.

Info

Publication number: CH707593B1
Application number: CH00467/13A
Authority: CH
Inventors: Schiesser Alain
Original assignee: Red & White Intellectual Property Man Sa
Priority date: 2013-02-15
Filing date: 2013-02-15
Publication date: 2018-03-29
Also published as: CH707593A2

Abstract

L’invention concerne une pièce d’horlogerie comportant au moins un barillet doté d’un ressort relié, par une première de ses extrémités, intérieure, à un arbre (12) du barillet et par sa deuxième extrémité, extérieure, à un tambour du barillet, ledit barillet étant agencé pour fournir de l’énergie par une première prise de force et par une deuxième prise de force, respectivement à un premier rouage associé à un premier mécanisme et à un deuxième rouage associé à un deuxième mécanisme, et un système de remontage (16) agencé pour armer le ressort du barillet. Selon l’invention, la pièce d’horlogerie comporte en outre un système de distribution (18) intercalé entre la première prise de force du barillet et le premier rouage de la pièce d’horlogerie, agencé de manière à ce que le premier et le deuxième rouages soient simultanément soumis à un couple, y compris pendant l’armage du ressort de barillet.The invention relates to a timepiece comprising at least one barrel having a spring connected, by a first of its ends, inside, to a shaft (12) of the barrel and by its second end, external, to a drum of the barrel, said barrel being arranged to supply energy by a first power take-off and a second power take-off, respectively to a first gear associated with a first mechanism and a second gear associated with a second mechanism, and a system winding device (16) arranged to arm the spring of the barrel. According to the invention, the timepiece further comprises a distribution system (18) interposed between the first take-off of the barrel and the first wheel of the timepiece, arranged so that the first and the second wheels are simultaneously subjected to a torque, including during the winding of the mainspring.

Description

Description Domaine technique [0001] La présente invention se rapporte au domaine de l’horlogerie. Elle concerne, plus particulièrement, une pièce d’horlogerie comportant un barillet doté d’un ressort relié, par une première de ses extrémités, intérieure, à un arbre du barillet et par sa deuxième extrémité, extérieure, à un tambour. Le barillet est agencé pour fournir de l’énergie par une première prise de force et par une deuxième prise de force, respectivement à un premier rouage associé à un premier mécanisme et à un deuxième rouage associé à un deuxième mécanisme. La pièce d’horlogerie comporte encore un système de remontage agencé pour armer le ressort du barillet.Description TECHNICAL FIELD [0001] The present invention relates to the field of watchmaking. More particularly, it relates to a timepiece comprising a barrel with a spring connected, by a first of its inner ends, to a shaft of the barrel and by its second end, outer, to a drum. The barrel is arranged to supply energy by a first power take-off and a second power take-off respectively to a first gear train associated with a first mechanism and a second gear train associated with a second mechanism. The timepiece further comprises a winding system arranged to arm the spring of the barrel.

Etat de la technique [0002] On connaît des pièces d’horlogerie dotée d’un ou de plusieurs barillets alimentant le rouage de finissage d’un mouvement, sous le contrôle d’un organe réglant. Lorsque ces pièces comportent un mécanisme additionnel consommant beaucoup d’énergie, comme une sonnerie, ce mécanisme additionnel est généralement doté de sa propre source d’énergie indépendante, afin de ne pas perturber la marche du mouvement et de ne pas péjorer sa réserve de marche.State of the art [0002] Timepieces are known which have one or more barrels supplying the finishing gear of a movement, under the control of a regulating member. When these parts have an additional mechanism consuming a lot of energy, such as a bell, this additional mechanism is usually provided with its own independent energy source, so as not to disrupt the movement and not to spoil its power reserve. .

[0003] On peut également augmenter la réserve de marche en disposant plusieurs barillets en série. On dispose alors d’une seule prise de force qui alimente le mouvement, depuis lequel on peut alimenter en énergie divers mécanismes additionnels ou complications.One can also increase the power reserve by having several barrels in series. We then have a single power take-off which feeds the movement, from which we can supply energy to various additional mechanisms or complications.

[0004] Rarement, une source d’énergie unique formée par un barillet ou plusieurs barillets interconnectés, est utilisée pour alimenter à la fois, directement depuis le barillet, le rouage de finissage et le mécanisme additionnel. En effet, dans ce cas, on utilise le tambour de barillet pour transmettre un couple, mais également l’arbre du barillet qui sert à la fois au remontage du barillet et à la transmission du couple emmagasiné par le barillet. Cependant, on doit prévoir un système de sécurité permettant de débrayer le système de remontage lors de l’alimentation du rouage de finissage et du mécanisme additionnel. De plus, le mécanisme additionnel ne peut fonctionner lors de l’armage du barillet.Rarely, a single energy source formed by a cylinder or several interconnected barrels, is used to feed both directly from the barrel, the gear train and the additional mechanism. Indeed, in this case, the barrel drum is used to transmit a torque, but also the shaft of the barrel which is used both for winding the barrel and for transmitting the torque stored by the barrel. However, there must be a safety system to disengage the winding system during the feeding of the gear train and the additional mechanism. In addition, the additional mechanism can not operate during the winding of the barrel.

[0005] La présente invention a pour but de résoudre ces inconvénients.The present invention aims to solve these disadvantages.

Divulguation de l’invention [0006] De façon plus précise, l’invention concerne une pièce d’horlogerie telle que définie dans la revendication 1.Disclosure of the invention [0006] More specifically, the invention relates to a timepiece as defined in claim 1.

Brève description des dessins [0007] D’autres détails de l’invention apparaîtront plus clairement à la lecture de la description qui suit, faite en référence au dessin annexé dans lequel: les fig. 1a et 1b sont respectivement des vues de dessus et en coupe d’un premier mode de réalisation d’une pièce d’horlogerie selon l’invention, les fig. 2a et 2b sont respectivement des vues de dessus et en coupe d’un deuxième mode de réalisation d’une pièce d’horlogerie selon l’invention, et la fig. 3 représente un mode de réalisation supplémentaire.BRIEF DESCRIPTION OF THE DRAWINGS [0007] Other details of the invention will appear more clearly on reading the description which follows, made with reference to the appended drawing in which: FIGS. 1a and 1b are respectively views from above and in section of a first embodiment of a timepiece according to the invention, FIGS. 2a and 2b are respectively views from above and in section of a second embodiment of a timepiece according to the invention, and FIG. 3 represents a further embodiment.

Mode de réalisation de l’invention [0008] L’invention concerne une pièce d’horlogerie comportant un barillet 10 doté, de manière conventionnelle, d’un ressort non représenté. Ce dernier est relié, par une première de ses extrémités, intérieure, à un arbre 12 du barillet et par sa deuxième extrémité, extérieure, à un tambour 14 du barillet. La pièce d’horlogerie comporte encore un système de remontage 16 agencé pour armer le ressort du barillet 10. Ce système de remontage 16 peut être de type automatique et/ou manuel, comme le connaît parfaitement l’homme du métier.Embodiment of the Invention [0008] The invention relates to a timepiece comprising a barrel 10 conventionally provided with a spring (not shown). The latter is connected, by a first of its ends, inside, to a shaft 12 of the barrel and by its second end, external, to a drum 14 of the barrel. The timepiece further comprises a winding system 16 arranged to arm the spring of the barrel 10. This winding system 16 may be automatic and / or manual type, as is well known to those skilled in the art.

[0009] Le barillet 10 est agencé pour fournir de l’énergie par une première prise de force et par une deuxième prise de force. Autrement dit, il n’y a pas de cliquet de blocage au niveau d’un röchet ou du système de remontage 16, qui, de manière générale, contraint le ressort de barillet 10 à ne se dévider qu’au niveau du tambour 14. On peut utiliser l’une quelconque de ces prises de force pour alimenter un rouage de finissage permettant de transmettre l’énergie du barillet 10 à un organe régulateur et l’autre de ces prises de force pour alimenter un mécanisme de sonnerie. On pourrait également utiliser cette deuxième prise de force pour alimenter un deuxième organe régulateur ou une complication additionnelle, comme une seconde morte. Plus généralement, la première prise de force et la deuxième prise de force sont respectivement reliées à un premier rouage associé à un premier mécanisme et à un deuxième rouage associé à un deuxième mécanisme.The barrel 10 is arranged to provide energy by a first power take-off and a second power take-off. In other words, there is no locking pawl at a röchet or the winding system 16, which generally forces the mainspring spring 10 to unwind only at the level of the drum 14. Any one of these power take-offs can be used to feed a finishing gear train enabling the energy of the barrel 10 to be transmitted to a regulating member and the other of these power take-offs to supply a striking mechanism. This second power take-off could also be used to feed a second regulator member or an additional complication, such as a second dead. More generally, the first PTO and the second PTO are respectively connected to a first gear associated with a first mechanism and a second gear associated with a second mechanism.

[0010] Selon l’invention, la pièce d’horlogerie comporte en outre un système de distribution 18 intercalé entre l’une des prises de force du barillet 10 et le premier rouage alimenté en énergie par la première prise de force.According to the invention, the timepiece further comprises a distribution system 18 interposed between one of the power take-offs of the barrel 10 and the first gear powered by the first power take-off.

[0011] Comme dans lesfig. 1 et 2, le système de distribution 18 peut être relié d’une part à l’arbre 12 du barillet et agencé de manière à recevoir un couple d’armage du système de remontage 16 et à le transmettre au ressort de barillet 10. D’autre part, le système de distribution 18 est relié à la première prise de force, pour lui transmettre un couple fourni par le ressort de barillet 10 lorsqu’il est armé.As in thefig. 1 and 2, the distribution system 18 can be connected firstly to the shaft 12 of the barrel and arranged to receive a winding torque of the winding system 16 and to transmit it to the mainspring spring 10. D on the other hand, the dispensing system 18 is connected to the first power take-off, to transmit to it a torque provided by the barrel spring 10 when it is armed.

[0012] Le système de distribution 18 comprend encore un ressort auxiliaire 20 reliant élastiquement la première prise de force au premier rouage. Le système de distribution 18 est agencé de manière à ce que le premier et le deuxième rouages soient simultanément soumis à un couple, y compris pendant l’armage du ressort de barillet 10.The dispensing system 18 further comprises an auxiliary spring 20 resiliently connecting the first power take-off at the first wheel. The dispensing system 18 is arranged so that the first and second wheels are simultaneously subjected to a torque, including during the winding of the mainspring spring 10.

[0013] Nous allons maintenant décrire en détail différents modes de réalisation, avec des systèmes de distribution différents.We will now describe in detail different embodiments, with different distribution systems.

[0014] Un premier mode de réalisation est proposé aux fig. 1a et 1b. Le système de distribution 18 comprend: - un röchet 22 lié cinématiquement au système de remontage 16 et solidaire de l’arbre 12 du barillet 10, - une roue d’encliquetage 24 solidaire de l’arbre 12 du barillet 10, et - une roue de sortie 26 reliée de manière unidirectionnelle avec la roue d’encliquetage 24.A first embodiment is proposed in FIGS. 1a and 1b. The dispensing system 18 comprises: - a röchet 22 kinematically connected to the winding system 16 and integral with the shaft 12 of the cylinder 10, - a ratchet wheel 24 integral with the shaft 12 of the cylinder 10, and - a wheel output 26 connected unidirectionally with the ratchet wheel 24.

[0015] La roue d’encliquetage 24 présente, typiquement, une denture de type dents de scie. Au moins un cliquet 28 est disposé sur la roue de sortie 26 de manière à coopérer avec la roue d’encliquetage 24 sous l’action de ressorts, afin de lier en rotation ladite roue de sortie 26 et ladite roue d’encliquetage 24 lors de la marche normale de la pièce d’horlogerie et de manière à ne pas transmettre à la roue de sortie, une rotation de la roue d’encliquetage induite par un armage du ressort de barillet 10 via le röchet 22. En effet, lors de la marche normale de la montre, c’est-à-dire lorsque le ressort de barillet 10 se détend, la roue d’encliquetage 24 est entraînée, en référence à la fig. 1a, dans le sens inverse des aiguilles d’une montre. Le cliquet 28 est alors maintenu engagé dans la denture et entraîne la roue de sortie 26 également dans le sens inverse des aiguilles d’une montre. Lors d’un remontage, la roue d’encliquetage 24 est entraînée dans le sens des aiguilles d’une montre. Le cliquet décliquète 28 et la roue de sortie 26 n’est pas entraînée par la roue d’encliquetage.The latching wheel 24 has, typically, a sawtooth type toothing. At least one pawl 28 is disposed on the output wheel 26 so as to cooperate with the ratchet wheel 24 under the action of springs, in order to link in rotation said output wheel 26 and said ratchet wheel 24 when the normal running of the timepiece and so as not to transmit to the output wheel, a rotation of the ratchet wheel induced by an arming of the mainspring spring 10 via the ratchet 22. Indeed, during the normal operation of the watch, that is to say when the mainspring spring 10 expands, the ratchet wheel 24 is driven, with reference to FIG. 1a, counterclockwise. The pawl 28 is then kept engaged in the toothing and drives the output wheel 26 also in the opposite direction of clockwise. When reassembling, the ratchet wheel 24 is driven in the clockwise direction. The pawl opens 28 and the output wheel 26 is not driven by the ratchet wheel.

[0016] Dans un mode de réalisation préféré, la roue de sortie 26 est en prise avec une roue du rouage de finissage de la pièce d’horlogerie, plus particulièrement avec une roue de grande moyenne 30. Cette dernière doit être soumise en permanence à l’action d’un couple, afin de ne pas stopper le fonctionnement de l’organe régulateur. Ainsi, lors d’un armage du ressort de barillet 10 par le système de remontage 16, même si le couple du barillet 10 est toujours disponible au niveau de l’arbre 12 du barillet 10, la grande moyenne 30 ne serait plus soumise à ce couple. Pour pallier cet inconvénient, le système de distribution 18 comprend encore un ressort auxiliaire 20 pour être connecté élastiquement à la roue de grande moyenne 30.In a preferred embodiment, the output wheel 26 is engaged with a wheel of the finishing train of the timepiece, more particularly with a wheel of high average 30. The latter must be permanently subject to the action of a couple, so as not to stop the operation of the regulating organ. Thus, during winding of the mainspring spring 10 by the winding system 16, even if the torque of the barrel 10 is still available at the shaft 12 of the barrel 10, the large average 30 would no longer be subject to this condition. couple. To overcome this drawback, the dispensing system 18 further comprises an auxiliary spring 20 to be connected elastically to the wheel of medium 30.

[0017] Plus précisément, la roue de sortie 26 est en prise avec un pignon 32 solidaire d’une douille 34 à laquelle est fixée une première extrémité de l’organe ressort auxiliaire 20, dont une deuxième extrémité est reliée à la roue de grande moyenne 30, librement montée sur la douille 34. Le ressort auxiliaire 20 peut être un spiral, comme représenté, ou d’un autre type. En fonctionnement normal, le ressort auxiliaire 20 est maintenu armé par le ressort de barillet 10 et, lors d’un armage, le ressort auxiliaire 20 prend le relais du ressort de barillet 10 pour exercer un couple sur la roue de grande moyenne 30 pendant que l’arbre 12 est entraîné dans le sens des aiguilles d’une montre.More specifically, the output wheel 26 is engaged with a pinion 32 integral with a sleeve 34 to which is fixed a first end of the auxiliary spring member 20, a second end is connected to the wheel of large mean 30, freely mounted on the sleeve 34. The auxiliary spring 20 may be a spiral, as shown, or of another type. In normal operation, the auxiliary spring 20 is kept armed by the mainspring spring 10 and, during a winding, the auxiliary spring 20 takes over the mainspring spring 10 to exert a torque on the medium wheel 30 while the shaft 12 is driven in the direction of clockwise.

[0018] Afin d’éviter que le ressort auxiliaire 20 se dévide du côté de la roue de sortie 26, la position angulaire de la roue de sortie doit être maintenue en cours d’armage. Pour ce faire, la roue de sortie coopère en outre avec au moins un cliquet de blocage 36, agencé pour maintenir la position angulaire de la roue de sortie 26 lors d’un armage du ressort.To prevent the auxiliary spring 20 is unwound on the side of the output wheel 26, the angular position of the output wheel must be maintained during arming. To do this, the output wheel cooperates further with at least one locking pawl 36, arranged to maintain the angular position of the output wheel 26 during winding of the spring.

[0019] Ainsi, lorsque le ressort de barillet 10 est armé, il fournit un couple au niveau de son tambour 14, qui définit la deuxième prise de force. Ce tambour 14 peut être relié cinématiquement à un mécanisme de sonnerie ou autre, pour lui fournir de l’énergie lorsqu’il est actionné par son propre système de déclenchement. Bien que non représenté, l’homme du métier pourra, sans effort, imaginer la manière dont le tambour 14 de barillet 10 peut alimenter un mécanisme de sonnerie. Le ressort de barillet 10 fournit également, simultanément, un couple au niveau de son arbre 12 qui définit la première prise de force. Par l’intermédiaire du système de distribution 18, le ressort de barillet 10 alimente en énergie le rouage de finissage. Lors de l’armage du barillet 10, un couple est toujours transmis à la deuxième prise de force, ce qui fait que le mécanisme de sonnerie peut fonctionner si une fonction est déclenchée en cours d’armage. Grâce au système de distribution 18, même pendant le remontage, un couple est fourni au rouage de finissage, le cas échéant par le ressort auxiliaire 20.Thus, when the barrel spring 10 is armed, it provides a torque at its drum 14, which defines the second PTO. This drum 14 can be kinematically connected to a striking mechanism or the like, to provide energy when actuated by its own trigger system. Although not shown, those skilled in the art can, without effort, imagine how the barrel drum 14 can feed a striking mechanism. The barrel spring 10 also simultaneously provides a torque at its shaft 12 which defines the first PTO. Through the dispensing system 18, the barrel spring 10 supplies energy to the finishing gear train. During the winding of the barrel 10, a torque is always transmitted to the second PTO, so that the striking mechanism can work if a function is triggered during arming. Thanks to the dispensing system 18, even during reassembly, a torque is supplied to the work train, if necessary by the auxiliary spring 20.

[0020] Dans un deuxième mode de réalisation illustré sur les fig. 2a et 2b, le système de distribution 18 comprend un différentiel 40 avec: - une entrée reliée cinématiquement au système de remontage 16, - une entrée/sortie reliée à un röchet 22 solidaire de l’arbre 12 du barillet 10, et - une sortie reliée élastiquement au rouage du premier mécanisme.In a second embodiment illustrated in FIGS. 2a and 2b, the distribution system 18 comprises a differential 40 with: - an input kinematically connected to the winding system 16, - an input / output connected to a socket 22 integral with the shaft 12 of the cylinder 10, and - an output elastically connected to the gear of the first mechanism.

[0021] Plus précisément, l’entrée est un porte-satellites 42 doté d’une denture périphérique en prise avec le système de remontage 16 et monté libre en rotation sur l’axe du différentiel. Au moins un satellite 44 est monté libre en rotation sur le porte-satellite, avec un pignon de chaque côté du porte-satellite, chacun étant respectivement en prise avec un premier etMore specifically, the input is a planet carrier 42 having a peripheral toothing engaged with the winding system 16 and rotatably mounted on the axis of the differential. At least one satellite 44 is rotatably mounted on the planet carrier, with a pinion on each side of the planet carrier, each being respectively engaged with a first and

Claims

a second sun gear. The solar gears are secured respectively to a first 46 and a second 48 solar wheels, each pair pinion-solar wheel is free on the axis of the differential. Also, the input / output is one of the solar wheels 46, 48, in engagement with a fixed röchet of the shaft 12 of the barrel 10. Thus, a winding torque provided by the winding system 16 causes the rotation of the planet carrier 42 and the first 46 of the solar wheels. The winding torque is thus transmitted to the röchet. The satellite is in fact locked in rotation on itself, by the fact that the second 48 of the solar wheels, which defines the output of the differential, is connected to a cog that blocks it. If the output is connected to the work train and to a regulating member cooperating with an escapement, the stopping phases of the escapement make it possible to block in rotation the second sun gear relative to the first sun gear. Like the one proposed in the first embodiment, the second sun gear 48 which defines the output of the differential, is engaged with a pinion 32 elastically connected to a wheel of high average 30. The pinion 32 is integral with a bush 34 to which is fixed a first end of the auxiliary spring 20, a second end is connected to the wheel of medium 30, freely mounted on the sleeve. The angular position of the output of the differential is also maintained by a locking pawl 36, in order to prevent the auxiliary spring 20 from unwinding on the side of the differential 40. [0024] Thus, when the mainspring spring 10 is armed, it provides a torque at its drum 14, which defines the second PTO. This drum 14 can be kinematically connected to a striking mechanism or the like, to provide energy when actuated by its own trigger system. Although not shown, those skilled in the art can, without effort, imagine how the barrel drum 14 can feed a striking mechanism. The barrel spring 10 also simultaneously provides a torque at its shaft 12 which defines the first PTO. The planet carrier 42 is then blocked by the winding system 16 and the torque supplied to the first sun gear 46 is transmitted to the second sun gear 48 by the rotation on itself of the satellite 44. Thus, via the distribution system 18, the barrel spring 10 supplies energy to the finishing gear train. During the winding of the barrel 10, a torque is always transmitted to the second PTO, so that the striking mechanism can work if a function is triggered during arming. Thanks to the dispensing system 18, even during reassembly, a torque is provided to the work train, where appropriate by the auxiliary spring 20, as explained above. In FIG. 3 is proposed a further embodiment, wherein the winding system 16 is connected to the barrel 10 by the drum 14. The drum 14 also defines the first PTO as explained below. The dispensing system 18 comprises a ratchet wheel 24 mounted free to rotate on the shaft 12 of the cylinder 10 and unidirectionally connected to the drum 14. At least one pawl 28 is mounted on the drum 14 so as to drive the wheel latching 24 during the normal running of the timepiece, but so as to unclip when winding the spring. The dispensing system 18 further comprises an output wheel 26 integral with the ratchet wheel and elastically connected to the gear of the first mechanism, typically to the large average 30, according to the examples above. The second PTO is arranged at the shaft of the barrel, which can carry a drive wheel 50. [0026] Thus is it proposed to associate a dispensing system 18 to the barrel 10, to allow it to receive a pair of arming and transmit a torque from the barrel 10 via a second power take-off, which accumulates with the first defined by the drum 14 of the cylinder 10. The two power take-offs are still functional and, where appropriate during the winding of the barrel spring 10, an auxiliary spring 20 may be provided, particularly in the case where the second power take-off is connected to the finishing gear train, in order to permanently maintain a torque on the regulating member. The above examples use a single barrel 10, but the skilled person can directly associate in series (or parallel) other barrel (s), the dispensing system 18 being associated with the barrel. one of the power take-offs of the energy source. claims

1. Timepiece comprising: - at least one barrel (10) provided with a spring connected, by a first of its ends, inside, to a shaft (12) of the barrel (10) and its second end, outer, a drum (14) of the barrel (10), said barrel (10) being arranged to supply energy by a first power take-off and by a second power take-off respectively to a first gear train associated with a first mechanism and a second gear associated with a second mechanism, and - a winding system (16) arranged to arm the spring of the barrel (10), characterized in that it further comprises a distribution system (18) interposed between the first take-off of the barrel (10) and the first wheel of the timepiece, said dispensing system (18) comprising an auxiliary spring (20) elastically connecting said first power take-off to said first gear, said dispensing system (18). ) being arranged so that the first and second wheels are simultaneously subjected to a torque, including during the winding of the mainspring (10).

2. Timepiece according to claim 1, characterized in that the dispensing system (18) comprises an outlet arranged to be rotated by the barrel during the normal running of the timepiece and not to be driven during winding of the mainspring (10).

Timepiece according to one of claims 1 and 2, characterized in that the dispensing system (18) is further arranged to receive the winding system (16) and to transmit to said barrel spring (10). ), a couple of arming.

4. Timepiece according to one of claims 2 and 3, characterized in that said dispensing system (18) comprises: - a röchet (22) cinematically connected to the winding system (16) and secured to the shaft (12) of the barrel (10), - a locking wheel integral with the shaft (12) of the barrel (10), and - an output wheel (26) forming said output and connected unidirectionally with the wheel of latching, defining said first power take-off.

5. Timepiece according to claim 4, characterized in that it comprises at least one pawl (28) disposed on the output wheel so as to cooperate with the ratchet wheel (24), so as to bind in rotating said output wheel (26) and said ratchet wheel during the normal running of the timepiece and so as not to transmit to said output wheel, a rotation of the ratchet wheel induced by an armature the barrel spring (10) via the lock (22).

6. Timepiece according to one of claims 4 and 5, characterized in that said output wheel (26) further cooperates with at least one locking pawl (36), arranged to maintain the angular position of said wheel output when winding the mainspring.

7. Timepiece according to one of claims 4 to 6, characterized in that the output wheel (26) is engaged with a pinion (32), integral with a sleeve (34) to which is fixed a first end of the auxiliary spring (20), a second end is connected to a wheel of the first gear, freely mounted on said sleeve.

8. Timepiece according to one of claims 2 and 3, characterized in that said distribution system (18) comprises a differential (40) with: - an input kinematically connected to the winding system (16), - a input / output connected to a socket integral with the shaft (12) of the cylinder (10), and - said output defining said first PTO.

9. Timepiece according to claim 8, characterized in that said input is a planet carrier (42) engaged with the winding system (16) and in that said input / output is a first sun gear (46). ) engaged with said pin and connected to a satellite (44) carried by the planet carrier, so that a winding torque provided by the winding system (16) is transmitted to said röchet.

10. Timepiece according to claim 9, characterized in that the output is a second sun gear (48) connected to said satellite (44) and engaged with a pinion (32), integral with a bushing (34) to which is fixed a first end of the auxiliary spring (20), a second end is connected to a wheel of the first gear, freely mounted on said sleeve.

11. Timepiece according to one of the preceding claims, characterized in that said first wheel is a finishing train connecting the barrel (10) to a regulating member.