EP1825336B1 - Animated timepiece - Google Patents

Animated timepiece Download PDF

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Publication number
EP1825336B1
EP1825336B1 EP05819155A EP05819155A EP1825336B1 EP 1825336 B1 EP1825336 B1 EP 1825336B1 EP 05819155 A EP05819155 A EP 05819155A EP 05819155 A EP05819155 A EP 05819155A EP 1825336 B1 EP1825336 B1 EP 1825336B1
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EP
European Patent Office
Prior art keywords
wheel
pinion unit
movement
rotation
indicator member
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EP05819155A
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German (de)
French (fr)
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EP1825336A2 (en
Inventor
Christophe Claret
Jan Dubois
Pierre C/o PIALLO GmbH KOUKJIAN
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Christophe Claret SA
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Christophe Claret SA
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    • 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
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0023—Inscriptions or pictures moved by the clockwork, e.g. for advertising
    • 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
    • G04B13/00—Gearwork
    • G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/26—Clocks or watches with indicators for tides, for the phases of the moon, or the like
    • G04B19/268—Clocks or watches with indicators for tides, for the phases of the moon, or the like with indicators for the phases of the moon

Definitions

  • the present invention relates to the field of watchmaking. More particularly, it relates to a movement for a timepiece comprising a mechanism arranged to drive an indicator member in a periodically activated furtive rotation movement, with a predefined period.
  • the watch movement comprises a finishing gear, the mechanism further comprising a first mobile comprising a first wheel, at least indirectly engaged with the finishing gear, a second mobile mounted coaxial with the first mobile, having at least one stopping zone and a second wheel, integral in rotation, a second kinematic connection connecting the second wheel to the indicator member, an elastic member connecting the first mobile to the second mobile so that its state of charge is a function of the respective angular positions of the first and second mobile, locking means arranged to cooperate with the stopping zone of the second mobile to lock the latter in rotation between two successive movements of the indicator member.
  • the indicating member carries a sign, which may or may not be representative of a time information, this sign being made visible to a user, through a dial opening of the timepiece, only during at least part of the stealth rotation movement.
  • jumping mechanisms are known from the state of the art, in particular in motions intended to drive one or the other of the time indicating members jumping or intermittently.
  • many movements of the type called “dead second” are known in which the indicator member of the second is driven by jumps at a lower frequency than that of the time base of the movement, typically an escapement.
  • the patent US 2,591,876 presents an embodiment of a movement of this type.
  • these mechanisms use two wheels, one of which is driven continuously by the finishing train and the other only intermittently, by the discharge of an elastic member loading between two successive jumps, under the effect of the continuous rotation of the first wheel.
  • Locking means similar to an escape anchor are conventionally used to retain the second wheel between two movements, by interaction with a toothing thereof.
  • the main object of the present invention is to propose a compact and reliable alternative to the known mechanisms of the prior art.
  • Another object of the present invention is to display information furtively, with a speed that allows to ensure visibility.
  • the invention relates to a watch movement of the type mentioned above, characterized in that the first mobile comprises a cam, coaxial and secured to the first wheel, arranged to act on the locking means, at each period, to unlock momentarily and allow a furtive rotation of the second mobile of a predefined angle, under the effect of the elastic member.
  • the movement is further characterized by the fact that its mechanism also comprises a retarder device cooperating with the second mobile so as to limit its stealth rotation speed.
  • the watch movement can be of any known type and level of complication without its mechanism for intermittent driving of an indicator organ imposes significant constraints on its manufacturer.
  • a retarder acts on the second mobile makes it possible to limit the speed of movement of a sign carried by the indicator member, to improve its visibility with the wearer of the corresponding timepiece.
  • the second mobile comprises a control wheel in the periphery of which is formed the stopping zone, in the form of a notch.
  • the locking means comprise one, preferably two, long springs, a free end is arranged to cooperate with this notch to ensure the rotational locking of the control wheel.
  • the cam preferably has a general shape of disc of predetermined radius, less than an activation radius, defined between the axis of rotation of the second mobile and the bottom of the notch, the cam further comprising a finger located at a distance from the axis of rotation greater than the activation radius and for pushing the free end of or of one of the long springs at each period.
  • the indicator member is made of a transparent material and bears a sign representing a shooting star, the latter being superimposed on a disc indicating the phases of the Moon. Thanks to these particular characteristics, the watch movement offers an exclusive animation to the wearer of the corresponding watch, by superimposing on a display member a temporal information.
  • the present invention also relates to a timepiece in which such a movement is implemented.
  • the figure 1 partially shows a wheel center 1 driven clockwise and meshing, via two referrals 2 and 3, with a first mobile 4.
  • the first mobile comprises a pinion 5 connected to a cam 6, coaxially, and carries a first end (not visible) of a spiral spring 7.
  • the cam has a general shape of disc, of predefined radius, of which a part of the periphery is elongated to define a finger 8. Thus, in the central region of his finger, the cam has a radius greater than its mean radius.
  • the other end 9 of the spiral spring is fixed to a second mobile 10 mounted coaxially with the first mobile. More precisely the end 9 is secured to a pin 11 carried by a control wheel 12 of the second mobile. The latter also comprises a lower wheel 13 coaxial and secured to the control wheel 12.
  • the control wheel has a notch 14 intended to receive alternately the free ends 15 and 16, diametrically opposite, two arms 17, 18 of a U-shaped double long spring 19.
  • the two arms 17 and 18 extend from a common base 20, fixedly mounted on a frame member of the movement by means of a screw 21.
  • the long springs provide a locking function by interaction with the notch defining a stopping zone of the control wheel.
  • the rotation of the pinion 5 in the counterclockwise direction has the effect of cocking the spiral spring 7 until the finger 8 of the cam 6 comes to lift the free end 15 of the first arm 17 of the spring 19.
  • the wheel 12 is thus released and, subjected to the action of the spiral spring 7, is rapidly driven 180 ° in the counterclockwise direction until the free end 16 of the second arm 18 of the spring 19 falls into its notch 14 and immobilizes it.
  • the speed of rotation of the control wheel is determined by the force of the spiral spring 7 as well as its pre-setting angle.
  • an activation radius is defined as corresponding to the distance separating the center of the cam from the bottom of the notch, it is sufficient for the radius of the cam in the region of its finger to be greater than this activation radius so that it can lift the free ends of the arms 17, 18.
  • the control wheel 12 drives the lower wheel 13. It meshes with the pinion (not visible) of a wheel whose wheel 23 meshes itself with the external toothing of an indicator member comprising a wheel 24, or toothed disk, carrying a metallization 25 which represents a shooting star.
  • the mechanism is designed so that this half-turn rotation of the wheel 23 rotates the metallization of an entire turn in the counter-clockwise direction.
  • the gear ratio of the system can be chosen such that the fast motion of the shooting star occurs every six minutes, for example.
  • the disk 24 carrying the shooting star 25 is sapphire and disposed in front of the disk 26 of a moon phase display mechanism, well known to those skilled in the art. The rest position of the star is obviously hidden under the dial.
  • the arms or long springs 17, 18 also act as a retarder device of the control wheel when it is released to perform a turn around.
  • Their free ends 15, 16 thus have shapes, represented in a non-limiting manner, particularly adapted both to the locking of the control wheel and to the exercise of a predetermined friction force to adjust its speed of rotation when is released.
  • at each moment of operation of the illustrated movement at least one of the two free ends 15 and 16 is disposed in abutment on the periphery of the control wheel.
  • the arrangement of the free ends 15, 16 so that they are substantially diametrically opposed relative to the control wheel 12 minimizes the stresses on the latter, particularly at its pivot. This particular feature contributes to improving the behavior over time of the mechanism according to the present invention.
  • the speed of movement of the shooting star opposite a dial window of the corresponding timepiece can be adjusted so that it moves stealthily while being clearly visible for the wearer of the piece.
  • the elastic member providing the connection between the first and second mobile can take a shape other than that of a spiral spring, without departing from the scope of the invention.
  • gear ratios and time values mentioned above are indicative and not limitative and can be adapted at will.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)
  • Gears, Cams (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Abstract

A timepiece movement is disclosed which may comprise a going train, and a mechanism having a first cinematic connection with the going train and arranged to drive an indicator member in a stealthy rotational movement, the latter being activated periodically with a predefined period. The mechanism may also comprise a first wheel-and-pinion unit comprising a first wheel at least indirectly in engagement with the going train, a second wheel-and-pinion unit, mounted coaxially with the first wheel-and-pinion unit and, having at least one stop region and a second wheel, these being integral in rotation. A second cinematic connection connects the second wheel to the indicator member, an elastic member connecting the first wheel-and-pinion unit to the second wheel-and-pinion unit in such a way that its degree of tension is a function of respective angular positions of the first and second wheel-and-pinion units. The mechanism may further comprise locking means designed to prevent the second wheel-and-pinion unit from rotating between two successive movements of the indicator member, as well as release means designed to act on the locking means, in each period, in order to release them momentarily and permit stealthy rotation of the second wheel-and-pinion unit through a predefined angle The mechanism may also comprise a retarding device acting on the second wheel-and-pinion unit in such a way as to limit its speed of stealthy rotation.

Description

Domaine techniqueTechnical area

La présente invention se rapporte au domaine de l'horlogerie. Elle concerne, plus particulièrement, un mouvement pour pièce d'horlogerie comprenant un mécanisme agencé pour entraîner un organe indicateur dans un mouvement de rotation furtif activé de manière périodique, avec une période prédéfinie.The present invention relates to the field of watchmaking. More particularly, it relates to a movement for a timepiece comprising a mechanism arranged to drive an indicator member in a periodically activated furtive rotation movement, with a predefined period.

Dans la suite du présent texte, il faudra comprendre l'utilisation du terme "furtif", en relation avec la notion de période, comme étant associée à un événement dont la durée est nettement plus courte que celle de cette période. A titre d'exemple non limitatif, on pourra considérer que le mouvement de rotation est activé une fois par minute et dure 3 secondes à chaque activation.In the remainder of this text, it will be necessary to understand the use of the term "stealth", in relation with the notion of period, as being associated with an event whose duration is much shorter than that of this period. By way of non-limiting example, it can be considered that the rotational movement is activated once a minute and lasts 3 seconds at each activation.

Plus précisément, le mouvement horloger comporte un rouage de finissage, le mécanisme comportant en outre
un premier mobile comprenant une première roue, au moins indirectement en prise avec le rouage de finissage,
un deuxième mobile monté coaxial par rapport au premier mobile, présentant au moins une zone d'arrêt et une deuxième roue, solidaires en rotation, une deuxième liaison cinématique reliant la deuxième roue à l'organe indicateur,
un organe élastique reliant le premier mobile au deuxième mobile de manière à ce que son état de charge soit fonction des positions angulaires respectives des premier et deuxième mobiles,
des moyens de verrouillage agencés pour coopérer avec la zone d'arrêt du deuxième mobile pour verrouiller ce dernier en rotation entre deux mouvements successifs de l'organe indicateur.More specifically, the watch movement comprises a finishing gear, the mechanism further comprising
a first mobile comprising a first wheel, at least indirectly engaged with the finishing gear,
a second mobile mounted coaxial with the first mobile, having at least one stopping zone and a second wheel, integral in rotation, a second kinematic connection connecting the second wheel to the indicator member,
an elastic member connecting the first mobile to the second mobile so that its state of charge is a function of the respective angular positions of the first and second mobile,
locking means arranged to cooperate with the stopping zone of the second mobile to lock the latter in rotation between two successive movements of the indicator member.

Dans un mode de réalisation préféré de l'invention, l'organe indicateur porte un signe, qui peut être représentatif ou non d'une information horaire, ce signe étant rendu visible pour un utilisateur, au travers d'une ouverture de cadran de la pièce d'horlogerie correspondante, uniquement pendant au moins une partie du mouvement de rotation furtif.In a preferred embodiment of the invention, the indicating member carries a sign, which may or may not be representative of a time information, this sign being made visible to a user, through a dial opening of the timepiece, only during at least part of the stealth rotation movement.

Etat de la techniqueState of the art

De nombreux mécanismes sautants sont connus de l'état de la technique, en particulier dans des mouvements destinés à entraîner l'un ou l'autre des organes d'indication de l'heure de manière sautante ou intermittente. A titre d'exemple, de nombreux mouvements du type appelé "à seconde morte" sont connus dans lesquels l'organe indicateur de la seconde est entraîné par sauts à une fréquence moindre que celle de la base de temps du mouvement, typiquement un échappement. Le brevet US 2,591,876 présente un mode de réalisation d'un mouvement de ce type.Numerous jumping mechanisms are known from the state of the art, in particular in motions intended to drive one or the other of the time indicating members jumping or intermittently. For example, many movements of the type called "dead second" are known in which the indicator member of the second is driven by jumps at a lower frequency than that of the time base of the movement, typically an escapement. The patent US 2,591,876 presents an embodiment of a movement of this type.

Généralement, ces mécanismes mettent en oeuvre deux roues dont l'une est entraînée de manière continue par le rouage de finissage et, l'autre seulement par intermittence, par la décharge d'un organe élastique se chargeant entre deux sauts successifs, sous l'effet de la rotation continue de la première roue. Des moyens de verrouillage similaires à une ancre d'échappement sont conventionnellement utilisés pour retenir la deuxième roue entre deux mouvements, par interaction avec une denture de cette dernière.Generally, these mechanisms use two wheels, one of which is driven continuously by the finishing train and the other only intermittently, by the discharge of an elastic member loading between two successive jumps, under the effect of the continuous rotation of the first wheel. Locking means similar to an escape anchor are conventionally used to retain the second wheel between two movements, by interaction with a toothing thereof.

Toutefois, ces mécanismes sont parfois encombrants, souvent sensibles aux chocs et ne permettent de transmettre que des mouvements très brusques à l'organe indicateur entraîné par intermittence.However, these mechanisms are sometimes bulky, often sensitive to shocks and only transmit very sudden movements to the indicator member driven intermittently.

Divulgation de l'inventionDisclosure of the invention

La présente invention a pour but principal de proposer une alternative, peu encombrante et fiable, aux mécanismes connus de l'art antérieur.The main object of the present invention is to propose a compact and reliable alternative to the known mechanisms of the prior art.

Un autre but de la présente invention est d'afficher une information de manière furtive, avec une vitesse qui permette d'en assurer la visibilité.Another object of the present invention is to display information furtively, with a speed that allows to ensure visibility.

A cet effet, l'invention concerne un mouvement horloger du type mentionné plus haut, caractérisé par le fait que le premier mobile comprend une came, coaxiale et solidaire de la première roue, agencée de manière à agir sur les moyens de verrouillage, à chaque période, pour les déverrouiller momentanément et permettre une rotation furtive du deuxième mobile d'un angle prédéfini, sous l'effet de l'organe élastique.To this end, the invention relates to a watch movement of the type mentioned above, characterized in that the first mobile comprises a cam, coaxial and secured to the first wheel, arranged to act on the locking means, at each period, to unlock momentarily and allow a furtive rotation of the second mobile of a predefined angle, under the effect of the elastic member.

Le mouvement est en outre caractérisé par le fait que son mécanisme comporte également un dispositif ralentisseur coopérant avec le deuxième mobile de manière à limiter sa vitesse de rotation furtive.The movement is further characterized by the fact that its mechanism also comprises a retarder device cooperating with the second mobile so as to limit its stealth rotation speed.

Grâce à ces caractéristiques particulières, le mouvement horloger peut être de tout type et de tout niveau de complication connus sans que son mécanisme d'entraînement intermittent d'un organe indicateur n'impose de contrainte importante à son constructeur.Thanks to these particular characteristics, the watch movement can be of any known type and level of complication without its mechanism for intermittent driving of an indicator organ imposes significant constraints on its manufacturer.

En outre, le fait qu'un ralentisseur agit sur le deuxième mobile permet de limiter la vitesse de déplacement d'un signe porté par l'organe indicateur, pour améliorer sa visibilité auprès du porteur de la pièce d'horlogerie correspondante. Ainsi, grâce au mouvement selon la présente invention, il est possible de rendre visible un tel signe, de manière furtive, ce qui n'est pas le cas des mécanismes de l'art antérieur dont le but est de remplacer un signe par un autre en un minimum de temps, et avec lesquels les déplacements de ces signes sont trop rapides pour répondre au but ci-dessus.In addition, the fact that a retarder acts on the second mobile makes it possible to limit the speed of movement of a sign carried by the indicator member, to improve its visibility with the wearer of the corresponding timepiece. Thus, thanks to the movement according to the present invention, it is possible to make such a sign visible, furtively, which is not the case of the mechanisms of the prior art whose purpose is to replace one sign with another. in a minimum of time, and with which the movements of these signs are too fast to meet the above purpose.

Dans un mode de réalisation préféré, le deuxième mobile comprend une roue de commande dans la périphérie de laquelle est ménagée la zone d'arrêt, sous la forme d'une échancrure. En outre, les moyens de verrouillage comprennent un, préférablement deux, ressorts longs dont une extrémité libre est agencée pour coopérer avec cette échancrure pour assurer le verrouillage en rotation de la roue de commande.In a preferred embodiment, the second mobile comprises a control wheel in the periphery of which is formed the stopping zone, in the form of a notch. In addition, the locking means comprise one, preferably two, long springs, a free end is arranged to cooperate with this notch to ensure the rotational locking of the control wheel.

Par ailleurs, la came présente préférablement une forme générale de disque de rayon prédéfini, inférieur à un rayon d'activation, défini entre l'axe de rotation du deuxième mobile et le fond de l'échancrure, la came comprenant en outre un doigt situé à une distance de l'axe de rotation supérieure au rayon d'activation et destiné à repousser l'extrémité libre du ou de l'un des ressorts longs à chaque période.Furthermore, the cam preferably has a general shape of disc of predetermined radius, less than an activation radius, defined between the axis of rotation of the second mobile and the bottom of the notch, the cam further comprising a finger located at a distance from the axis of rotation greater than the activation radius and for pushing the free end of or of one of the long springs at each period.

Dans ce cas, à chaque instant du fonctionnement du mécanisme, l'une au moins des extrémités libres respectives des ressorts longs est disposée en appui contre la périphérie de la roue de commande, jouant ainsi le rôle de ralentisseur.In this case, at each moment of the operation of the mechanism, at least one of the respective free ends of the long springs is disposed in abutment against the periphery of the control wheel, thus acting as a retarder.

Dans un mode de réalisation préféré, l'organe indicateur est réalisé en un matériau transparent et porte un signe représentant une étoile filante, celui-ci étant superposé à un disque indicateur des phases de la Lune. Grâce à ces caractéristiques particulières, le mouvement horloger offre une animation exclusive au porteur de la montre correspondante, par superposition à un organe d'affichage d'une information temporelle.In a preferred embodiment, the indicator member is made of a transparent material and bears a sign representing a shooting star, the latter being superimposed on a disc indicating the phases of the Moon. Thanks to these particular characteristics, the watch movement offers an exclusive animation to the wearer of the corresponding watch, by superimposing on a display member a temporal information.

La présente invention concerne également une pièce d'horlogerie dans laquelle un tel mouvement est mis en oeuvre.The present invention also relates to a timepiece in which such a movement is implemented.

Brève description des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description détaillée qui suit, faite en référence à la figure 1 annexée, présentée à titre d'exemple non limitatif et, représentant une vue schématique de dessus d'un mode de réalisation préféré d'une partie du mouvement selon la présente invention, notamment du mécanisme permettant de transmettre un mouvement de rotation furtif périodique à un organe indicateur.Other characteristics and advantages of the invention will appear more clearly on reading the detailed description which follows, made with reference to the figure 1 attached, presented by way of non-limiting example and, showing a schematic top view of a preferred embodiment of a part of the movement according to the present invention, including the mechanism for transmitting a periodic stealth rotation movement to a indicator organ.

Mode(s) de réalisation de l'inventionMode (s) of realization of the invention

La figure 1 montre partiellement une roue de centre 1 entraînée dans le sens horaire et engrenant, par l'intermédiaire de deux renvois 2 et 3, avec un premier mobile 4.The figure 1 partially shows a wheel center 1 driven clockwise and meshing, via two referrals 2 and 3, with a first mobile 4.

Le premier mobile comporte un pignon 5 lié à une came 6, de manière coaxiale, et porte une première extrémité (non visible) d'un ressort spiral 7. La came présente une forme générale de disque, de rayon prédéfini, dont une partie de la périphérie est allongée pour définir un doigt 8. Ainsi, dans la région centrale de son doigt, la came présente un rayon supérieur à son rayon moyen.The first mobile comprises a pinion 5 connected to a cam 6, coaxially, and carries a first end (not visible) of a spiral spring 7. The cam has a general shape of disc, of predefined radius, of which a part of the periphery is elongated to define a finger 8. Thus, in the central region of his finger, the cam has a radius greater than its mean radius.

L'autre extrémité 9 du ressort spiral est fixée à un deuxième mobile 10 monté coaxial au premier mobile. Plus précisément l'extrémité 9 est solidaire d'une goupille 11 portée par une roue de commande 12 de ce deuxième mobile. Ce dernier comporte également une roue inférieure 13 coaxiale et solidaire de la roue de commande 12.The other end 9 of the spiral spring is fixed to a second mobile 10 mounted coaxially with the first mobile. More precisely the end 9 is secured to a pin 11 carried by a control wheel 12 of the second mobile. The latter also comprises a lower wheel 13 coaxial and secured to the control wheel 12.

La roue de commande présente une échancrure 14 destinée à recevoir alternativement les extrémités libres 15 et 16, diamétralement opposées, de deux bras 17, 18 d'un double ressort long 19 en forme de U. Les deux bras 17 et 18 s'étendent à partir d'une base commune 20, montée fixe sur un élément de bâti du mouvement au moyen d'une vis 21.The control wheel has a notch 14 intended to receive alternately the free ends 15 and 16, diametrically opposite, two arms 17, 18 of a U-shaped double long spring 19. The two arms 17 and 18 extend from a common base 20, fixedly mounted on a frame member of the movement by means of a screw 21.

De ce fait, les ressorts longs assurent une fonction de verrouillage par interaction avec l'échancrure définissant une zone d'arrêt de la roue de commande.As a result, the long springs provide a locking function by interaction with the notch defining a stopping zone of the control wheel.

La rotation du pignon 5 dans le sens anti-horaire a pour effet d'armer le ressort spiral 7 jusqu'à ce que le doigt 8 de la came 6 vienne soulever l'extrémité libre 15 du premier bras 17 du ressort 19. La roue de commande 12 se trouve ainsi libérée et, soumise à l'action du ressort spiral 7, est rapidement entraînée de 180° dans le sens anti-horaire jusqu'à ce que l'extrémité libre 16 du deuxième bras 18 du ressort 19 tombe dans son échancrure 14 et l'immobilise. La vitesse de rotation de la roue de commande est déterminée par la force du ressort spiral 7 ainsi que par son angle de préarmage.The rotation of the pinion 5 in the counterclockwise direction has the effect of cocking the spiral spring 7 until the finger 8 of the cam 6 comes to lift the free end 15 of the first arm 17 of the spring 19. The wheel 12 is thus released and, subjected to the action of the spiral spring 7, is rapidly driven 180 ° in the counterclockwise direction until the free end 16 of the second arm 18 of the spring 19 falls into its notch 14 and immobilizes it. The speed of rotation of the control wheel is determined by the force of the spiral spring 7 as well as its pre-setting angle.

Si on définit un rayon d'activation comme correspondant à la distance séparant le centre de la came du fond de l'échancrure, il suffit que le rayon de la came dans la région de son doigt soit supérieur à ce rayon d'activation pour que celui-ci puisse soulever les extrémités libres des bras 17, 18.If an activation radius is defined as corresponding to the distance separating the center of the cam from the bottom of the notch, it is sufficient for the radius of the cam in the region of its finger to be greater than this activation radius so that it can lift the free ends of the arms 17, 18.

Lors de cette rotation d'un demi-tour, la roue de commande 12 entraîne la roue inférieure 13. Celle-ci engrène avec le pignon (non visible) d'un mobile dont une roue 23 engrène elle-même avec la denture externe d'un organe indicateur comprenant une roue 24, ou disque denté, portant une métallisation 25 qui représente une étoile filante. Le mécanisme est conçu pour que cette rotation d'un demi-tour de la roue 23 fasse tourner la métallisation d'un tour entier dans le sens anti-horaire.During this rotation of a half-turn, the control wheel 12 drives the lower wheel 13. It meshes with the pinion (not visible) of a wheel whose wheel 23 meshes itself with the external toothing of an indicator member comprising a wheel 24, or toothed disk, carrying a metallization 25 which represents a shooting star. The mechanism is designed so that this half-turn rotation of the wheel 23 rotates the metallization of an entire turn in the counter-clockwise direction.

La rotation du pignon 5 se poursuivant, le même processus se répétera périodiquement, les rôles des extrémités libres 15, 16 des bras 17 et 18 s'inversant à chaque fois.The rotation of the pinion 5 continues, the same process will be repeated periodically, the roles of the free ends 15, 16 of the arms 17 and 18 reversing each time.

Le rapport d'engrenage du système peut être choisi de telle manière que le mouvement rapide de l'étoile filante se produit toutes les six minutes, à titre d'exemple.The gear ratio of the system can be chosen such that the fast motion of the shooting star occurs every six minutes, for example.

Selon un mode de réalisation avantageux, le disque 24 portant l'étoile filante 25 est en saphir et disposé devant le disque 26 d'un mécanisme d'affichage des phases de la Lune, bien connu de l'homme de métier. La position de repos de l'étoile est évidemment cachée sous le cadran.According to an advantageous embodiment, the disk 24 carrying the shooting star 25 is sapphire and disposed in front of the disk 26 of a moon phase display mechanism, well known to those skilled in the art. The rest position of the star is obviously hidden under the dial.

La description ci-dessus s'attache à décrire des modes de réalisation particuliers à titre d'illustration non limitative et, l'invention n'est pas limitée, par exemple, à la forme et au nombre de ressorts 17, 18 permettant d'assurer le verrouillage de la roue de commande. On peut notamment prévoir qu'un seul ressort de ce type est mis en oeuvre, ou encore que deux ressorts indépendants l'un de l'autre sont fixés à l'élément de bâti du mouvement.The above description attempts to describe particular embodiments by way of non-limiting illustration and the invention is not limited, for example, to the shape and the number of springs 17, 18 making it possible to lock the control wheel. In particular it can be provided that a single spring of this type is implemented, or that two springs independent of each other are attached to the frame member of the movement.

Il apparaît de ce qui précède qu'en plus de remplir la fonction de verrouillage de la roue de commande, les bras ou ressorts longs 17, 18 assurent également le rôle de dispositif ralentisseur de la roue de commande lorsqu'elle est libérée pour effectuer un demi-tour. Leurs extrémités libres 15, 16 présentent ainsi des formes, représentées à titre non limitatif, particulièrement adaptées à la fois au blocage de la roue de commande et à l'exercice d'une force de frottement prédéfinie pour ajuster sa vitesse de rotation lorsqu'elle est libérée. En effet, il est apparent que, de manière avantageuse, à chaque instant du fonctionnement du mouvement illustré, l'une au moins des deux extrémités libres 15 et 16 est disposée en appui sur la périphérie de la roue de commande. En outre, la disposition des extrémités libres 15, 16 de telle manière qu'elles soient sensiblement diamétralement opposées par rapport à la roue de commande 12 permet de minimiser les contraintes sur cette dernière, notamment au niveau de son pivot. Cette caractéristique particulière contribue à améliorer la tenue dans le temps du mécanisme selon la présente invention.It appears from the above that in addition to fulfilling the locking function of the control wheel, the arms or long springs 17, 18 also act as a retarder device of the control wheel when it is released to perform a turn around. Their free ends 15, 16 thus have shapes, represented in a non-limiting manner, particularly adapted both to the locking of the control wheel and to the exercise of a predetermined friction force to adjust its speed of rotation when is released. Indeed, it is apparent that, advantageously, at each moment of operation of the illustrated movement, at least one of the two free ends 15 and 16 is disposed in abutment on the periphery of the control wheel. In addition, the arrangement of the free ends 15, 16 so that they are substantially diametrically opposed relative to the control wheel 12 minimizes the stresses on the latter, particularly at its pivot. This particular feature contributes to improving the behavior over time of the mechanism according to the present invention.

De manière alternative, on pourrait mettre en oeuvre un ressort lame supplémentaire, par exemple, agencé de manière à présenter un contact permanent avec la périphérie de la roue de commande. De même, l'homme du métier pourra adapter la forme de la périphérie de la roue de commande à ses propres besoins, sans sortir du cadre de la présente invention. Une forme non régulière de cette périphérie permet de faire varier la vitesse de rotation de la roue de commande au cours d'un mouvement de rotation furtif particulier.Alternatively, it could implement an additional leaf spring, for example, arranged to have a permanent contact with the periphery of the control wheel. Similarly, the skilled person can adapt the shape of the periphery of the control wheel to his own needs, without departing from the scope of this invention. A non-regular shape of this periphery makes it possible to vary the speed of rotation of the control wheel during a particular stealth rotation movement.

Grâce à ces caractéristiques, la vitesse de déplacement de l'étoile filante en regard d'un guichet de cadran de la pièce d'horlogerie correspondante peut être ajustée de telle manière qu'elle s'y déplace de manière furtive tout en étant clairement visible pour le porteur de la pièce.Thanks to these characteristics, the speed of movement of the shooting star opposite a dial window of the corresponding timepiece can be adjusted so that it moves stealthily while being clearly visible for the wearer of the piece.

Par ailleurs, l'organe élastique assurant la liaison entre les premier et deuxième mobile peut prendre une autre forme que celle d'un ressort spiral, sans sortir du cadre de l'invention. De même les rapports d'engrenage et les valeurs temporelles mentionnés ci-dessus le sont à titre indicatif non limitatif et peuvent être adaptés à volonté.Furthermore, the elastic member providing the connection between the first and second mobile can take a shape other than that of a spiral spring, without departing from the scope of the invention. Similarly gear ratios and time values mentioned above are indicative and not limitative and can be adapted at will.

Claims (12)

  1. A timepiece movement comprising
    a going train (1), and
    a mechanism having a first kinematic connection (2, 3) with said going train and arranged to drive an indicator member (24, 25) in a stealthy rotational movement, said movement being activated periodically, with a predefined period,
    said mechanism also comprising
    a first wheel-and-pinion unit (4) comprising a first wheel (5) at least indirectly in engagement with said going train,
    a second wheel-and-pinion unit (10) mounted coaxially with said first wheel-and-pinion unit (4), having at least one stop region (14) and a second wheel (12), these being integral in rotation, while a second kinematic connection (23) connects said second wheel to said indicator member,
    an elastic member (7) connecting said first wheel-and-pinion unit (4) to said second wheel-and-pinion unit (10) in such a way that its degree of tension is a function of the respective angular positions of said first and second wheel-and-pinion units, and
    locking means (15, 16, 17, 18, 19) designed to engage with said stop region (14) of said second wheel-and-pinion unit to prevent the latter from rotating between two successive movements of said indicator member,
    characterized in that said first wheel-and-pinion unit comprises a cam (6) coaxial with and fixed to said first wheel (5) and designed to act on said locking means (15, 16, 17, 18, 19), in each period, in order to release them momentarily and permit stealthy rotation of said second wheel-and-pinion unit (10) through a predefined angle, under the action of said elastic member (7), and
    in that said mechanism also comprises a retarding device (15, 16) acting on said second wheel-and-pinion unit in such a way as to limit its speed of stealthy rotation.
  2. Movement according to claim 1, characterized in that said elastic member is a spiral spring (7) whose first end is attached to said first wheel-and-pinion unit while its second end (9) is attached to said second wheel-and-pinion unit (10).
  3. Movement according to claim 1 or 2, characterized in that said second wheel-and-pinion unit comprises a drive wheel (12), said stop region being formed in its periphery in the form of a notch (14), and
    in that said locking means comprise a first long spring (17, 18) with a free end (15, 16) designed to engage in said notch (14) and lock it.
  4. Movement according to claim 3, characterized in that said free end (15, 16) of the long spring (17, 18) is in permanent contact with the periphery of said drive wheel (12) to fulfill the function of said retarding device.
  5. Movement according to claim 3, characterized in that said locking means comprise a second long spring (18, 17) arranged in such a way that its free end (16, 15) is situated in a position approximately diametrically opposed to the position of the free end (15, 16) of said first long spring (17, 18) with reference to said drive wheel (12), in contact with the latter.
  6. Movement according to claim 5, characterized in that said first and second long springs (17, 18) are arranged in such a way that, at every instant, at least one of their respective free ends (15, 16) is bearing against the periphery of said drive wheel (12).
  7. Movement according to any one of claims 3 to 6, characterized in that the general shape of said cam (6) is that of a disk of predefined radius, shorter than a radius of activation, defined between the axis of rotation of said second wheel-and-pinion unit (10) and the bottom of the notch (14) of said drive wheel (12), said cam also comprising a nose (8) situated at a distance from said axis of rotation greater than said radius of activation and designed to push the free end (15, 16) of said long spring or springs (17, 18) out of said locking means in each period.
  8. Movement according to any one of the preceding claims, characterized in that said indicator member is connected to an indicator wheel (24), said second kinematic connection comprising a gear (23) connecting said second wheel (13) to said indicator wheel (24), and the latter elements being respectively numbered in such a way that said indicator member (24, 25) performs a half revolution in each of said stealthy rotational movements.
  9. A timepiece comprising a movement as claimed in any one of the preceding claims.
  10. A timepiece comprising a case containing a movement as claimed in claim 8, in which said indicator member (24, 25) carries a sign (25) designed to permit a distinction between the respective states of rotation and immobility of said indicator member, said movement being surmounted by a dial comprising at least one window through which said sign can be made visible during each of said stealthy rotational movements.
  11. Timepiece according to claim 10, characterized in that said indicator member and at least the plate of said indicator wheel (24) are made of one or more essentially transparent materials, preferably sapphire.
  12. Timepiece according to claim 11, characterized in that said indicator member and said indicator wheel (24) are on top of a member (26) for displaying the phases of the moon.
EP05819155A 2004-12-03 2005-12-05 Animated timepiece Active EP1825336B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH02004/04A CH697018A5 (en) 2004-12-03 2004-12-03 animated timepiece.
PCT/EP2005/056480 WO2006058925A2 (en) 2004-12-03 2005-12-05 Animated timepiece

Publications (2)

Publication Number Publication Date
EP1825336A2 EP1825336A2 (en) 2007-08-29
EP1825336B1 true EP1825336B1 (en) 2008-03-19

Family

ID=34974577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05819155A Active EP1825336B1 (en) 2004-12-03 2005-12-05 Animated timepiece

Country Status (8)

Country Link
US (1) US7420883B2 (en)
EP (1) EP1825336B1 (en)
AT (1) ATE389903T1 (en)
CH (1) CH697018A5 (en)
DE (1) DE602005005520T2 (en)
ES (1) ES2304027T3 (en)
PT (1) PT1825336E (en)
WO (1) WO2006058925A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH702842B1 (en) * 2010-03-17 2014-11-14 Bulgari Horlogerie Sa Timepiece fitted with a retrograde display mechanism moon phase ..
CH704997A1 (en) * 2011-05-24 2012-11-30 Richemont Int Sa Shows including an animation display mechanism.
CH717359B1 (en) * 2020-04-29 2022-11-30 Van Cleef & Arpels SA Device for triggering a watch mechanism.

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH198192A (en) * 1936-06-18 1938-06-15 Ed Jaeger Societe Anonyme Ets Clock with transparent dial and invisible mechanism.
US2591876A (en) * 1949-07-01 1952-04-08 Ebauches Sa Dead-second watch mechanism
US2643506A (en) * 1950-03-29 1953-06-30 Jaeger Ets Ed Clock
CH351543A (en) * 1958-11-27 1961-01-15 Schneider Gustave Waldemar Timepiece
CH446198A (en) * 1965-04-20 1968-03-15 Ebauchesfabrik Eta Ag Date clock with jerky date change
JPS5151647Y2 (en) * 1971-03-04 1976-12-10
DE2218690C3 (en) * 1972-04-18 1974-08-29 Otero Uhrenrohwerke Otto Epple Kg, 7535 Koenigsbach Clock with digital time display
CH584928B5 (en) * 1973-07-13 1977-02-15 Ebauchesfabrik Eta Ag
CH1195873A4 (en) 1973-08-20 1975-12-31
US4063411A (en) * 1975-11-06 1977-12-20 Pforzheimer Uhren-Rohwerke Rudolf Wehner Stepping mechanism
CH682285B5 (en) * 1991-12-20 1994-02-28 Ebauchesfabrik Eta Ag Timepiece of the mechanical or electromechanical type comprising a drive wheel driving at least a display device such as a display of dates.
EP1321832A1 (en) * 2001-12-20 2003-06-25 Frédéric Piguet S.A. Timepiece comprising a mechanism for indicating lunar phases with backward reversal
EP1372047A1 (en) * 2002-06-13 2003-12-17 Desco von Schulthess AG Timepiece with retrograde display

Also Published As

Publication number Publication date
ATE389903T1 (en) 2008-04-15
WO2006058925A2 (en) 2006-06-08
US20080106978A1 (en) 2008-05-08
ES2304027T3 (en) 2008-09-01
DE602005005520D1 (en) 2008-04-30
CH697018A5 (en) 2008-03-14
DE602005005520T2 (en) 2009-05-07
US7420883B2 (en) 2008-09-02
EP1825336A2 (en) 2007-08-29
WO2006058925A3 (en) 2007-02-08
PT1825336E (en) 2008-07-01

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