EP3740821B1 - Timepiece mechanism for the display of information - Google Patents

Timepiece mechanism for the display of information Download PDF

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Publication number
EP3740821B1
EP3740821B1 EP19704047.0A EP19704047A EP3740821B1 EP 3740821 B1 EP3740821 B1 EP 3740821B1 EP 19704047 A EP19704047 A EP 19704047A EP 3740821 B1 EP3740821 B1 EP 3740821B1
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EP
European Patent Office
Prior art keywords
follower
cam
drive wheel
timepiece mechanism
elastic means
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EP19704047.0A
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German (de)
French (fr)
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EP3740821A1 (en
Inventor
Marc Lemonnier
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Publication of EP3740821A1 publication Critical patent/EP3740821A1/en
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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
    • 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
    • G04B19/262—Clocks or watches with indicators for tides, for the phases of the moon, or the like with indicators for astrological informations
    • 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

Definitions

  • the present invention relates to a timepiece mechanism, and more particularly a timepiece mechanism making it possible to display information relating to astronomy such as the times of sunrise and sunset on the dial of a watch.
  • a rake comprises a feeler which, by the action of a return spring on the rake, rests on the periphery of a cam integral in rotation with a wheel which drives it. .
  • Rotation of the cam moves the rake angularly allowing the toothed sector of the rake to rotate a drive wheel which carries an indicator member.
  • the indicator member generally a hand, indicates on the dial of the watch the value read on the cam.
  • the information to be displayed corresponds to the variable radius of the cam.
  • the arcuate travel of the rake introduces a reading error which must be compensated for by correcting the shape of the cam.
  • This reading error is all the greater as the variations in radius of the cam are great.
  • the shape of the cam is specific to a given point (latitude, longitude) of the globe. The closer this point is to the poles, the more the shape of the cam is marked and the greater the reading error will be.
  • the calculation of the shape of the cam must therefore take into account a corrective factor which also varies according to the angular position of the cam.
  • the gear ratio between the toothed sector of the rake and the drive wheel allowing the exact display of information depends on the shape of the cam. In the context of displaying the time of getting up or sunset, or in any other application where the shape of the cam is specific to a given point on the globe, changing the cam in order to display information relating to another latitude/longitude requires adapting the ratio of gear.
  • this timepiece mechanism produces friction and relatively large pivoting games and requires the assembly of a large number of parts.
  • two respective rakes and two respective return springs must be provided, as well as the axes of rotation for the rakes.
  • a device for displaying sunrise and sunset times comprising a sun wheel bearing a representation of the sun, a first flap integral in rotation with a first toothing, a second flap integral in rotation with a second toothing, said shutters and said sun wheel being pivoted about a common axis of rotation, and a rack-and-pinion actuating member carrying out a reciprocating movement in translation under the action of a cam and whose racks cooperate respectively with the first and second toothing in order to cause said flaps to pivot around said common axis of rotation.
  • a first objective of the present invention consists in proposing a watchmaking mechanism for the display of information whose shape of the cams is easier to calculate than in the case of the aforementioned mechanism with cam and rake and whose cams can be easily replaced by differently shaped cams.
  • a second objective of the present invention is to provide such a watch mechanism which reduces friction and play and which is simple to assemble.
  • the present invention proposes a timepiece mechanism for displaying information comprising a first cam set in motion by a pivoting means, first elastic means holding a first follower member against the first cam, a first indicator drive wheel set in motion by the first follower, a second cam set in motion by the pivoting means, second elastic means maintaining a second follower against the second cam and a second indicator drive wheel moved by the second follower member, the first and second follower members being guided in translation, the first indicator drive wheel cooperating with a side face of the first follower member substantially parallel to its direction of displacement, so as to allow the first cam to pivot the first indicator drive wheel by the intermediary of the first follower member, the second indicator drive wheel cooperating with a side face of the second follower member substantially parallel to its direction of movement, so as to allow the second cam to cause the second drive wheel to pivot indicator via the second follower member.
  • the first and second follower members are guided in translation respectively by the first elastic means and by the second elastic means.
  • the invention also relates to a watch comprising a timepiece mechanism as defined above.
  • the appended figure is a plan view of a timepiece mechanism according to the invention, making it possible to indicate the times of sunrise and sunset.
  • the invention aims to propose a watchmaking mechanism for displaying information at the level of a dial of a watch, simple to design and to assemble.
  • the watch movement will not be described in its entirety, but only a mechanism for displaying the times of sunrise and sunset according to the invention.
  • the dial of the watch is not represented in the figure either, in order to facilitate understanding of the invention by the reader.
  • the figure illustrates a particular and non-limiting embodiment of a watch mechanism 20 according to the invention, allowing the sunrise time to be displayed on the dial of a watch.
  • the power take-off of the watch mechanism 20 consists of a pinion 22 meshing with a first wheel 24A.
  • the first wheel 24A is mounted in rotation around a first pivot axis 26A, so as to allow the pinion 22 to drive the pivoting of the wheel 24A around the first pivot axis 26A.
  • the first wheel 24A rotates at the rate of one revolution per year. It could nevertheless rotate at another speed, for example one revolution in two years.
  • a first cam 28A is integral in rotation with the first wheel 24A.
  • the position as well as the shape of the periphery of said cam 28A are chosen so as to describe a variation in the time of sunrise during the year. More precisely, the radius passing through the center and a side face 32A of the first cam 28A varies along its periphery. The perimeter of the cam 28A is delimited by its side face 32A.
  • 34A marking on the first cam 28A indicates the watchmaker angular position that should have the first cam 28A on January 1 of the year.
  • the invention comprises a first follower member 36A of longitudinal shape, one end 38A of which is in contact with the periphery of the first cam 28A.
  • the first follower member 36A is connected to a first movable rigid part 40A via two flexible blades 42A.
  • the flexible blades 42A are substantially parallel to each other.
  • the extremities flexible blades 42A are joined to a first side face 44A of the first follower member 36A and to a side face 46A of the first movable rigid part 40A.
  • the flexible blades 42A are configured to work in flexion when the first cam 28A moves the first follower member 36A.
  • the flexible blades 42A are arranged so as to keep the end 38A of the first follower member 36A bearing against the periphery of the first cam 28A, and limit the displacement of the first follower member 36A by the first cam 28A to one movement. translation substantially parallel to its longitudinal direction 52A.
  • the first mobile rigid part 40A is also linked to a base 48 by means of two flexible strips 42A, so as to form a system with flexible double guidance of the first follower member 36A.
  • the base 48 is intended to be fixed to a frame 49, typically the frame of the watch movement, and thus to be kept fixed relative to the dial of the watch.
  • a flexible double guide system limits the phenomena of parasitic displacements and allows the first follower member 36A to move according to a pure translation.
  • the flexible blades holding the first movable rigid part 40A to the base 48 are similar to the flexible blades holding the first movable rigid part 40A to the first follower member 36A.
  • the first follower member 36A comprises, at a second side face 50A, opposite its first side face 44A and substantially parallel to its longitudinal direction 52A, a series of teeth 54A forming a rack. These teeth 54A cooperate with the teeth of a first indicator drive wheel 56A.
  • the first indicator drive wheel 56A is rotatably mounted about a second pivot axis 58 parallel or substantially parallel to the first pivot axis 26A of the first wheel 24A.
  • the first indicator drive wheel 56A carries a first indicator member 57A such as a first hand, so as to be able to indicate the time of sunrise in cooperation with a scale present on the dial of the watch.
  • the pivoting of the first cam 28A by the first wheel 24A causes a rectilinear displacement of the first follower member 36A along its longitudinal direction 52A against an elastic return action exerted by the flexible blades 42A.
  • the displacement of the first follower member 36A corresponds to the variation of the radius of the first cam 28A along its periphery, without reading error and without the shape of the first cam 28A needing to be corrected.
  • replacement of the first cam 28A by a cam of a different shape is possible, to display the time of sunrise at another point on the Earth, without having to modify the gear ratio between the first follower member 36A and the first indicator drive wheel 56A.
  • the flexible blades 42A more precisely the flexible guide system 40A, 42A, 48, perform the dual function of guiding the first follower member 36A in translation and of elastically biasing the first follower member 36A against the first cam 28A.
  • No means of guiding in translation other than the system 40A, 42A, 48 is necessary and the friction between the first follower member 36A and the frame 49 can be eliminated or at least reduced. Any phenomenon of seizing or blocking of the first follower member 36A due to its guidance is also avoided.
  • the watch mechanism 20 is also configured to display the time of sunset.
  • the power take-off of this mechanism is constituted by the pinion 22 mentioned above, which meshes with a second wheel 24B.
  • the second wheel 24B is mounted in rotation about a pivot axis 26B parallel to the first pivot axis 26A, so as to allow the pinion 22 to drive said wheel 24B to pivot about said axis 26B.
  • the second wheel 24B rotates at a rate of one turn per year. It could nevertheless rotate at another speed, for example one revolution in two years.
  • a second cam 28B is integral in rotation with the second wheel 24B.
  • the position as well as the shape of the periphery of said cam 28B are chosen so as to describe a variation in the time of sunset during the year. More precisely, the radius passing through the center and a side face 32B of the second cam 28B varies along its periphery. The periphery of the cam 28B is delimited by its side face 32B.
  • 34B marking on the second cam 28B indicates the watchmaker angular position that should have second cam 28B on January 1 of the year.
  • the invention comprises a second follower member 36B of longitudinal shape, one end 38B of which is in contact with the periphery of the second cam 28B.
  • the second follower member 36B is connected to a second mobile rigid part 40B via two flexible strips 42B.
  • the flexible blades 42B are substantially parallel to each other. The ends of the flexible blades 42B are joined to a first side face 44B of the second follower member 36B and to a side face 46B of the second movable rigid part 40B.
  • the flexible blades 42B are configured to work in flexion when the second cam 28B moves the second follower member 36B.
  • the flexible blades 42B are arranged so as to hold the end 38B of the second follower member 36B in abutment against the periphery of the second cam 28B, and limit the movement of the second follower member 36B by the second cam 28B to one movement. translation substantially parallel to its longitudinal direction 52B.
  • the flexible blades 42B are substantially identical to the flexible blades 42A described above.
  • the second mobile rigid part 40B is also linked to the base 48 by means of two flexible blades 42B, so as to form a system with flexible double guidance of the second follower member 36B.
  • the second follower member 36B comprises at a second side face 50B, opposite to its first side face 44B and substantially parallel to its longitudinal direction 52B, a series of teeth 54B forming a rack. These teeth 54B cooperate with a deflection wheel 60 driving a second indicator drive wheel 56B rotatably mounted around the second pivot axis 58 but free to rotate with respect to the first indicator drive wheel 56A. It should be noted that only part of the second indicator drive wheel 56B is represented in the figure, in order to allow the reader to visualize more easily the cooperation between the first follower member 36A and the first drive wheel. indicator 56A.
  • the second indicator drive wheel 56B carries a second indicator member 57B, such as a second hand, so as to be able to indicate the sunset time in cooperation with a scale present on the dial of the watch.
  • Idler wheel 60 because it drives second indicator drive wheel 56B, is also an indicator drive wheel.
  • the watch mechanism for displaying the time of sunset is simpler to design and more easily adaptable to other cam shapes, generates less friction and less backlash and is easier to assemble.
  • the watch mechanism 20 with its two cams 28A, 28B and its two follower members 36A, 36B allows precise measurement of sunrise and sunset times, by making the measurement of sunrise times independent of that of sunset times. This independence of the two measurements makes it possible to take into account the fact that the phenomena of sunrise and sunset are not perfectly symmetrical.
  • the assembly comprising the follower members 36A, 36B, the flexible blades 42A, 42B, the rigid moving parts 40A, 40B and the base 48 is made in one piece, for example by deep reactive ion etching (DRIE) in silicon or any other suitable material, by LIGA (lithography, electroplating, casting) in nickel, nickel-phosphorus or any other suitable material, or by spark erosion in steel (Durnico ® or other) or any other suitable material, thus reducing the number of parts and facilitating assembly.
  • DRIE deep reactive ion etching
  • the present invention is applicable to displays other than sunrise and sunset, in particular to other displays of astronomical information, for example to a display of the hours of tide.
  • the timepiece mechanism 20 advantageously comprises a cam 28A moved about a first pivot axis 26A by a pivot means 22, elastic means 42A holding a follower member 36A against the cam 28A and an indicator drive wheel 56A mounted around a second pivot axis 58 and set in motion by the follower member 36A, the follower member 36A being guided in translation, the drive wheel d indicator 56A cooperating with a side face 50A of the follower member 36A substantially parallel to its direction of movement 52A, so as to allow the cam 28A to cause the indicator drive wheel 56A to pivot via the follower 36A to indicate information.
  • the watch mechanism 20 also comprises another cam 28B set in motion by the pivoting means 22, other elastic means 42B holding another follower member 36B against said other cam 28B, said other follower member 36B being guided in translation, and another indicator drive wheel 56B/60 moved by said other follower 36B.

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  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)

Description

DOMAINE TECHNIQUE AUQUEL SE RAPPORTE L'INVENTIONTECHNICAL FIELD TO WHICH THE INVENTION RELATES

La présente invention concerne un mécanisme horloger, et plus particulièrement un mécanisme horloger permettant d'afficher une information relative à l'astronomie telle que les heures du lever et du coucher du soleil au niveau du cadran d'une montre.The present invention relates to a timepiece mechanism, and more particularly a timepiece mechanism making it possible to display information relating to astronomy such as the times of sunrise and sunset on the dial of a watch.

ARRIERE-PLAN TECHNOLOGIQUETECHNOLOGICAL BACKGROUND

Il est connu de l'état de la technique des mécanismes horlogers pour afficher une ou plusieurs informations au niveau du cadran d'une montre. Selon un exemple typique de tel mécanisme, un râteau comporte un palpeur qui, par l'action d'un ressort de rappel sur le râteau, s'appuie sur le pourtour d'une came solidaire en rotation d'une roue qui l'entraîne. La rotation de la came déplace angulairement le râteau permettant au secteur denté du râteau de faire tourner une roue d'entraînement qui porte un organe indicateur. L'organe indicateur, généralement une aiguille, indique sur le cadran de la montre la valeur lue sur la came.It is known from the state of the art of watch mechanisms to display one or more information on the dial of a watch. According to a typical example of such a mechanism, a rake comprises a feeler which, by the action of a return spring on the rake, rests on the periphery of a cam integral in rotation with a wheel which drives it. . Rotation of the cam moves the rake angularly allowing the toothed sector of the rake to rotate a drive wheel which carries an indicator member. The indicator member, generally a hand, indicates on the dial of the watch the value read on the cam.

Dans un tel mécanisme à came, l'information à afficher correspond au rayon, variable, de la came. Toutefois, la course en arc de cercle du râteau introduit une erreur de lecture qu'il faut compenser en corrigeant la forme de la came. Cette erreur de lecture est d'autant plus grande que les variations de rayon de la came sont grandes. Dans le cas d'un affichage de l'heure de lever ou de coucher du soleil, la forme de la came est propre à un point donné (latitude, longitude) du globe. Plus ce point est proche des pôles, plus la forme de la came est marquée et plus l'erreur de lecture sera grande. Le calcul de la forme de la came doit donc prendre en compte un facteur correctif qui en outre varie en fonction de la position angulaire de la came.In such a cam mechanism, the information to be displayed corresponds to the variable radius of the cam. However, the arcuate travel of the rake introduces a reading error which must be compensated for by correcting the shape of the cam. This reading error is all the greater as the variations in radius of the cam are great. In the case of a sunrise or sunset time display, the shape of the cam is specific to a given point (latitude, longitude) of the globe. The closer this point is to the poles, the more the shape of the cam is marked and the greater the reading error will be. The calculation of the shape of the cam must therefore take into account a corrective factor which also varies according to the angular position of the cam.

De plus, le rapport d'engrenage entre le secteur denté du râteau et la roue d'entraînement permettant l'affichage exact de l'information dépend de la forme de la came. Dans le contexte de l'affichage de l'heure de lever ou de coucher du soleil, ou dans toute autre application où la forme de la came est propre à un point donné du globe, changer la came dans le but d'afficher une information relative à une autre latitude/longitude requiert d'adapter le rapport d'engrenage.In addition, the gear ratio between the toothed sector of the rake and the drive wheel allowing the exact display of information depends on the shape of the cam. In the context of displaying the time of getting up or sunset, or in any other application where the shape of the cam is specific to a given point on the globe, changing the cam in order to display information relating to another latitude/longitude requires adapting the ratio of gear.

Selon d'autres inconvénients, ce mécanisme horloger produit des frottements et des jeux de pivotement relativement importants et nécessite l'assemblage d'un grand nombre de pièces. En particulier, pour afficher les heures de lever et de coucher du soleil, en plus des deux cames (une pour le lever, l'autre pour le coucher), deux râteaux respectifs et deux ressorts de rappel respectifs doivent être prévus, ainsi que les axes de rotation pour les râteaux.According to other drawbacks, this timepiece mechanism produces friction and relatively large pivoting games and requires the assembly of a large number of parts. In particular, to display the times of sunrise and sunset, in addition to the two cams (one for sunrise, the other for sunset), two respective rakes and two respective return springs must be provided, as well as the axes of rotation for the rakes.

On connaît aussi par le document CH 712374 un dispositif d'affichage des heures de lever et de coucher du soleil comprenant un mobile du soleil portant une représentation du soleil, un premier volet solidaire en rotation d'une première denture, un second volet solidaire en rotation d'une seconde denture, lesdits volets et ledit mobile du soleil étant pivotés autour d'un axe de rotation commun, et un organe d'actionnement à crémaillères effectuant un mouvement de va-et-vient en translation sous l'action d'une came et dont les crémaillères coopèrent respectivement avec les première et seconde dentures afin de faire pivoter lesdits volets autour dudit axe de rotation commun.We also know from the document CH 712374 a device for displaying sunrise and sunset times comprising a sun wheel bearing a representation of the sun, a first flap integral in rotation with a first toothing, a second flap integral in rotation with a second toothing, said shutters and said sun wheel being pivoted about a common axis of rotation, and a rack-and-pinion actuating member carrying out a reciprocating movement in translation under the action of a cam and whose racks cooperate respectively with the first and second toothing in order to cause said flaps to pivot around said common axis of rotation.

Un premier objectif de la présente invention consiste à proposer un mécanisme horloger pour l'affichage d'information dont la forme des cames soit plus facile à calculer que dans le cas du mécanisme susmentionné à came et râteau et dont les cames puissent être aisément remplacées par des cames de forme différente.A first objective of the present invention consists in proposing a watchmaking mechanism for the display of information whose shape of the cams is easier to calculate than in the case of the aforementioned mechanism with cam and rake and whose cams can be easily replaced by differently shaped cams.

Un second objectif de la présente invention est de proposer un tel mécanisme horloger qui diminue les frottements et les jeux et qui soit simple à assembler.A second objective of the present invention is to provide such a watch mechanism which reduces friction and play and which is simple to assemble.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Afin de répondre, en partie au moins, au premier objectif, la présente invention propose un mécanisme horloger pour l'affichage d'information comprenant une première came mise en mouvement par un moyen de pivotement, des premiers moyens élastiques maintenant un premier organe suiveur contre la première came, une première roue d'entraînement d'indicateur mise en mouvement par le premier organe suiveur, une deuxième came mise en mouvement par le moyen de pivotement, des deuxièmes moyens élastiques maintenant un deuxième organe suiveur contre la deuxième came et une deuxième roue d'entraînement d'indicateur mise en mouvement par le deuxième organe suiveur, les premier et deuxième organes suiveurs étant guidés en translation, la première roue d'entraînement d'indicateur coopérant avec une face latérale du premier organe suiveur sensiblement parallèle à sa direction de déplacement, de manière à permettre à la première came de faire pivoter la première roue d'entraînement d'indicateur par l'intermédiaire du premier organe suiveur, la deuxième roue d'entraînement d'indicateur coopérant avec une face latérale du deuxième organe suiveur sensiblement parallèle à sa direction de déplacement, de manière à permettre à la deuxième came de faire pivoter la deuxième roue d'entraînement d'indicateur par l'intermédiaire du deuxième organe suiveur.In order to respond, at least in part, to the first objective, the present invention proposes a timepiece mechanism for displaying information comprising a first cam set in motion by a pivoting means, first elastic means holding a first follower member against the first cam, a first indicator drive wheel set in motion by the first follower, a second cam set in motion by the pivoting means, second elastic means maintaining a second follower against the second cam and a second indicator drive wheel moved by the second follower member, the first and second follower members being guided in translation, the first indicator drive wheel cooperating with a side face of the first follower member substantially parallel to its direction of displacement, so as to allow the first cam to pivot the first indicator drive wheel by the intermediary of the first follower member, the second indicator drive wheel cooperating with a side face of the second follower member substantially parallel to its direction of movement, so as to allow the second cam to cause the second drive wheel to pivot indicator via the second follower member.

Afin de répondre, en partie au moins, au second objectif, les premiers et deuxièmes organes suiveurs sont guidés en translation respectivement par les premiers moyens élastiques et par les deuxièmes moyens élastiques.In order to respond, at least in part, to the second objective, the first and second follower members are guided in translation respectively by the first elastic means and by the second elastic means.

L'invention concerne également une montre comportant un mécanisme horloger tel que défini ci-dessus.The invention also relates to a watch comprising a timepiece mechanism as defined above.

DESCRIPTION DE LA FIGUREFIGURE DESCRIPTION

La description qui va suivre en regard de la figure annexée, donnée à titre d'exemple non limitatif, permettra de mieux comprendre en quoi consiste l'invention et comment elle peut être réalisée. La figure annexée est une vue en plan d'un mécanisme horloger selon l'invention, permettant d'indiquer les heures de lever et de coucher du soleil.The description which will follow with regard to the appended figure, given by way of non-limiting example, will make it possible to better understand what the invention consists of and how it can be implemented. The appended figure is a plan view of a timepiece mechanism according to the invention, making it possible to indicate the times of sunrise and sunset.

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

Pour rappel, l'invention vise à proposer un mécanisme horloger pour l'affichage d'information au niveau d'un cadran d'une montre, simple à concevoir et à assembler.As a reminder, the invention aims to propose a watchmaking mechanism for displaying information at the level of a dial of a watch, simple to design and to assemble.

Dans ce qui suit, on ne décrira pas le mouvement d'horlogerie dans sa totalité, mais seulement un mécanisme d'affichage des heures du lever et du coucher du soleil selon l'invention. Le cadran de la montre n'est pas non plus représenté sur la figure, afin de faciliter la compréhension de l'invention par le lecteur.In what follows, the watch movement will not be described in its entirety, but only a mechanism for displaying the times of sunrise and sunset according to the invention. The dial of the watch is not represented in the figure either, in order to facilitate understanding of the invention by the reader.

La figure illustre un mode de réalisation particulier et non limitatif d'un mécanisme horloger 20 selon l'invention, permettant l'affichage de l'heure du lever du soleil au niveau du cadran d'une montre. La prise de force du mécanisme horloger 20 est constituée par un pignon 22 engrenant avec une première roue 24A. La première roue 24A est montée en rotation autour d'un premier axe de pivotement 26A, de manière à permettre au pignon 22 d'entraîner le pivotement de la roue 24A autour du premier axe de pivotement 26A. La première roue 24A tourne à raison d'un tour par an. Elle pourrait néanmoins tourner à une autre vitesse, par exemple un tour en deux ans.The figure illustrates a particular and non-limiting embodiment of a watch mechanism 20 according to the invention, allowing the sunrise time to be displayed on the dial of a watch. The power take-off of the watch mechanism 20 consists of a pinion 22 meshing with a first wheel 24A. The first wheel 24A is mounted in rotation around a first pivot axis 26A, so as to allow the pinion 22 to drive the pivoting of the wheel 24A around the first pivot axis 26A. The first wheel 24A rotates at the rate of one revolution per year. It could nevertheless rotate at another speed, for example one revolution in two years.

Une première came 28A est solidaire en rotation de la première roue 24A. La position ainsi que la forme du pourtour de ladite came 28A sont choisies de manière à décrire une variation de l'heure du lever du soleil au cours de l'année. Plus précisément, le rayon passant par le centre et une face latérale 32A de la première came 28A varie le long de son pourtour. Le pourtour de la came 28A est délimité par sa face latérale 32A. Le marquage 34A figurant sur la première came 28A indique à l'horloger la position angulaire que doit avoir la première came 28A le 1er janvier de l'année.A first cam 28A is integral in rotation with the first wheel 24A. The position as well as the shape of the periphery of said cam 28A are chosen so as to describe a variation in the time of sunrise during the year. More precisely, the radius passing through the center and a side face 32A of the first cam 28A varies along its periphery. The perimeter of the cam 28A is delimited by its side face 32A. 34A marking on the first cam 28A indicates the watchmaker angular position that should have the first cam 28A on January 1 of the year.

L'invention comprend un premier organe suiveur 36A de forme longitudinale, dont une extrémité 38A est en contact avec le pourtour de la première came 28A. Le premier organe suiveur 36A est relié à une première partie rigide mobile 40A par l'intermédiaire de deux lames flexibles 42A. Les lames flexibles 42A sont sensiblement parallèles entre elles. Les extrémités des lames flexibles 42A sont jointes à une première face latérale 44A du premier organe suiveur 36A et à une face latérale 46A de la première partie rigide mobile 40A. Les lames flexibles 42A sont configurées pour travailler en flexion lorsque la première came 28A déplace le premier organe suiveur 36A. Plus précisément, les lames flexibles 42A sont agencées de sorte à maintenir l'extrémité 38A du premier organe suiveur 36A en appui contre le pourtour de la première came 28A, et limiter le déplacement du premier organe suiveur 36A par la première came 28A à un mouvement de translation sensiblement parallèle à sa direction longitudinale 52A.The invention comprises a first follower member 36A of longitudinal shape, one end 38A of which is in contact with the periphery of the first cam 28A. The first follower member 36A is connected to a first movable rigid part 40A via two flexible blades 42A. The flexible blades 42A are substantially parallel to each other. The extremities flexible blades 42A are joined to a first side face 44A of the first follower member 36A and to a side face 46A of the first movable rigid part 40A. The flexible blades 42A are configured to work in flexion when the first cam 28A moves the first follower member 36A. More specifically, the flexible blades 42A are arranged so as to keep the end 38A of the first follower member 36A bearing against the periphery of the first cam 28A, and limit the displacement of the first follower member 36A by the first cam 28A to one movement. translation substantially parallel to its longitudinal direction 52A.

La première partie rigide mobile 40A est également liée à une base 48 par l'intermédiaire de deux lames flexibles 42A, de sorte à former un système à double guidage flexible du premier organe suiveur 36A. La base 48 est destinée à être fixée à un bâti 49, typiquement le bâti du mouvement de montre, et à être ainsi maintenue fixe par rapport au cadran de la montre. De façon avantageuse, un système à double guidage flexible limite les phénomènes de déplacements parasites et permet au premier organe suiveur 36A de se déplacer selon une translation pure. Selon le présent exemple, les lames flexibles maintenant la première partie rigide mobile 40A à la base 48 sont similaires aux lames flexibles maintenant la première partie rigide mobile 40A au premier organe suiveur 36A. Au repos, c'est-à-dire avant que le premier organe suiveur 36A soit mis en coopération avec la première came 28A, toutes les lames flexibles 42A sont droites et parallèles entre elles. La présente invention n'exclut toutefois pas que les lames flexibles 42A soient, au repos, droites et non parallèles, ou courbes et parallèles, ou courbes et non parallèles.The first mobile rigid part 40A is also linked to a base 48 by means of two flexible strips 42A, so as to form a system with flexible double guidance of the first follower member 36A. The base 48 is intended to be fixed to a frame 49, typically the frame of the watch movement, and thus to be kept fixed relative to the dial of the watch. Advantageously, a flexible double guide system limits the phenomena of parasitic displacements and allows the first follower member 36A to move according to a pure translation. According to the present example, the flexible blades holding the first movable rigid part 40A to the base 48 are similar to the flexible blades holding the first movable rigid part 40A to the first follower member 36A. At rest, that is to say before the first follower member 36A is brought into cooperation with the first cam 28A, all the flexible blades 42A are straight and parallel to each other. The present invention does not however exclude that the flexible blades 42A are, at rest, straight and not parallel, or curved and parallel, or curved and not parallel.

Le premier organe suiveur 36A comporte au niveau d'une deuxième face latérale 50A, opposée à sa première face latérale 44A et sensiblement parallèle à sa direction longitudinale 52A, une série de dents 54A formant une crémaillère. Ces dents 54A coopèrent avec la denture d'une première roue d'entraînement d'indicateur 56A. La première roue d'entraînement d'indicateur 56A est montée en rotation autour d'un deuxième axe de pivotement 58 parallèle ou sensiblement parallèle au premier axe de pivotement 26A de la première roue 24A. La première roue d'entraînement d'indicateur 56A porte un premier organe indicateur 57A tel qu'une première aiguille, de manière à pouvoir indiquer l'heure du lever du soleil en coopération avec une graduation présente sur le cadran de la montre.The first follower member 36A comprises, at a second side face 50A, opposite its first side face 44A and substantially parallel to its longitudinal direction 52A, a series of teeth 54A forming a rack. These teeth 54A cooperate with the teeth of a first indicator drive wheel 56A. The first indicator drive wheel 56A is rotatably mounted about a second pivot axis 58 parallel or substantially parallel to the first pivot axis 26A of the first wheel 24A. The first indicator drive wheel 56A carries a first indicator member 57A such as a first hand, so as to be able to indicate the time of sunrise in cooperation with a scale present on the dial of the watch.

Ainsi, le pivotement de la première came 28A par la première roue 24A entraîne un déplacement rectiligne du premier organe suiveur 36A le long de sa direction longitudinale 52A contre une action de rappel élastique exercée par les lames flexibles 42A. Le déplacement du premier organe suiveur 36A correspond à la variation du rayon de la première came 28A le long de son pourtour, sans erreur de lecture et sans que la forme de la première came 28A ait besoin d'être corrigée. De plus, un remplacement de la première came 28A par une came de forme différente est possible, pour afficher l'heure du lever du soleil en un autre point de la Terre, sans devoir modifier le rapport d'engrenage entre le premier organe suiveur 36A et la première roue d'entraînement d'indicateur 56A.Thus, the pivoting of the first cam 28A by the first wheel 24A causes a rectilinear displacement of the first follower member 36A along its longitudinal direction 52A against an elastic return action exerted by the flexible blades 42A. The displacement of the first follower member 36A corresponds to the variation of the radius of the first cam 28A along its periphery, without reading error and without the shape of the first cam 28A needing to be corrected. In addition, replacement of the first cam 28A by a cam of a different shape is possible, to display the time of sunrise at another point on the Earth, without having to modify the gear ratio between the first follower member 36A and the first indicator drive wheel 56A.

Un autre avantage de l'invention est que les lames flexibles 42A, plus exactement le système à guidage flexible 40A, 42A, 48, remplissent la double fonction de guider en translation le premier organe suiveur 36A et de rappeler élastiquement le premier organe suiveur 36A contre la première came 28A. Aucun autre moyen de guidage en translation que le système 40A, 42A, 48 n'est nécessaire et les frottements entre le premier organe suiveur 36A et le bâti 49 peuvent être supprimés ou au moins réduits. On évite aussi tout phénomène de grippage ou de blocage du premier organe suiveur 36A dû à son guidage.Another advantage of the invention is that the flexible blades 42A, more precisely the flexible guide system 40A, 42A, 48, perform the dual function of guiding the first follower member 36A in translation and of elastically biasing the first follower member 36A against the first cam 28A. No means of guiding in translation other than the system 40A, 42A, 48 is necessary and the friction between the first follower member 36A and the frame 49 can be eliminated or at least reduced. Any phenomenon of seizing or blocking of the first follower member 36A due to its guidance is also avoided.

Le mécanisme horloger 20 selon l'invention est également configuré pour afficher l'heure du coucher du soleil. La prise de force de ce mécanisme est constituée par le pignon 22 mentionné ci-dessus, qui engrène avec une deuxième roue 24B. La deuxième roue 24B est montée en rotation autour d'un axe de pivotement 26B parallèle au premier axe de pivotement 26A, de manière à permettre au pignon 22 d'entraîner le pivotement de ladite roue 24B autour dudit axe 26B. La deuxième roue 24B tourne à raison d'un tour par an. Elle pourrait néanmoins tourner à une autre vitesse, par exemple un tour en deux ans.The watch mechanism 20 according to the invention is also configured to display the time of sunset. The power take-off of this mechanism is constituted by the pinion 22 mentioned above, which meshes with a second wheel 24B. The second wheel 24B is mounted in rotation about a pivot axis 26B parallel to the first pivot axis 26A, so as to allow the pinion 22 to drive said wheel 24B to pivot about said axis 26B. The second wheel 24B rotates at a rate of one turn per year. It could nevertheless rotate at another speed, for example one revolution in two years.

Une deuxième came 28B est solidaire en rotation de la deuxième roue 24B. La position ainsi que la forme du pourtour de ladite came 28B sont choisies de manière à décrire une variation de l'heure du coucher du soleil au cours de l'année. Plus précisément, le rayon passant par le centre et une face latérale 32B de la deuxième came 28B varie le long de son pourtour. Le pourtour de la came 28B est délimité par sa face latérale 32B. Le marquage 34B figurant sur la deuxième came 28B indique à l'horloger la position angulaire que doit avoir la deuxième came 28B le 1er janvier de l'année.A second cam 28B is integral in rotation with the second wheel 24B. The position as well as the shape of the periphery of said cam 28B are chosen so as to describe a variation in the time of sunset during the year. More precisely, the radius passing through the center and a side face 32B of the second cam 28B varies along its periphery. The periphery of the cam 28B is delimited by its side face 32B. 34B marking on the second cam 28B indicates the watchmaker angular position that should have second cam 28B on January 1 of the year.

L'invention comprend un deuxième organe suiveur 36B de forme longitudinale, dont une extrémité 38B est en contact avec le pourtour de la deuxième came 28B. Le deuxième organe suiveur 36B est relié à une deuxième partie rigide mobile 40B par l'intermédiaire de deux lames flexibles 42B. Les lames flexibles 42B sont sensiblement parallèles entre elles. Les extrémités des lames flexibles 42B sont jointes à une première face latérale 44B du deuxième organe suiveur 36B et à une face latérale 46B de la deuxième partie rigide mobile 40B. Les lames flexibles 42B sont configurées pour travailler en flexion lorsque la deuxième came 28B déplace le deuxième organe suiveur 36B. Plus précisément, les lames flexibles 42B sont agencées de sorte à maintenir l'extrémité 38B du deuxième organe suiveur 36B en appui contre le pourtour de la deuxième came 28B, et limiter le déplacement du deuxième organe suiveur 36B par la deuxième came 28B à un mouvement de translation sensiblement parallèle à sa direction longitudinale 52B. Selon le présent exemple, les lames flexibles 42B sont sensiblement identiques aux lames flexibles 42A décrites ci-dessus.The invention comprises a second follower member 36B of longitudinal shape, one end 38B of which is in contact with the periphery of the second cam 28B. The second follower member 36B is connected to a second mobile rigid part 40B via two flexible strips 42B. The flexible blades 42B are substantially parallel to each other. The ends of the flexible blades 42B are joined to a first side face 44B of the second follower member 36B and to a side face 46B of the second movable rigid part 40B. The flexible blades 42B are configured to work in flexion when the second cam 28B moves the second follower member 36B. More specifically, the flexible blades 42B are arranged so as to hold the end 38B of the second follower member 36B in abutment against the periphery of the second cam 28B, and limit the movement of the second follower member 36B by the second cam 28B to one movement. translation substantially parallel to its longitudinal direction 52B. According to the present example, the flexible blades 42B are substantially identical to the flexible blades 42A described above.

La deuxième partie rigide mobile 40B est également liée à la base 48 par l'intermédiaire de deux lames flexibles 42B, de sorte à former un système à double guidage flexible du deuxième organe suiveur 36B.The second mobile rigid part 40B is also linked to the base 48 by means of two flexible blades 42B, so as to form a system with flexible double guidance of the second follower member 36B.

Le deuxième organe suiveur 36B comporte au niveau d'une deuxième face latérale 50B, opposée à sa première face latérale 44B et sensiblement parallèle à sa direction longitudinale 52B, une série de dents 54B formant une crémaillère. Ces dents 54B coopèrent avec une roue de renvoi 60 entraînant une deuxième roue d'entraînement d'indicateur 56B montée en rotation autour du deuxième axe de pivotement 58 mais libre en rotation par rapport à la première roue d'entraînement d'indicateur 56A. Il est à noter qu'une partie seulement de la deuxième roue d'entraînement d'indicateur 56B est représentée sur la figure, afin de permettre au lecteur de visualiser plus aisément la coopération entre le premier organe suiveur 36A et la première roue d'entraînement d'indicateur 56A. La deuxième roue d'entraînement d'indicateur 56B porte un deuxième organe indicateur 57B, tel qu'une deuxième aiguille, de manière à pouvoir indiquer l'heure du coucher du soleil en coopération avec une graduation présente sur le cadran de la montre. La roue de renvoi 60, du fait qu'elle entraîne la deuxième roue d'entraînement d'indicateur 56B, est elle aussi une roue d'entraînement d'indicateur.The second follower member 36B comprises at a second side face 50B, opposite to its first side face 44B and substantially parallel to its longitudinal direction 52B, a series of teeth 54B forming a rack. These teeth 54B cooperate with a deflection wheel 60 driving a second indicator drive wheel 56B rotatably mounted around the second pivot axis 58 but free to rotate with respect to the first indicator drive wheel 56A. It should be noted that only part of the second indicator drive wheel 56B is represented in the figure, in order to allow the reader to visualize more easily the cooperation between the first follower member 36A and the first drive wheel. indicator 56A. The second indicator drive wheel 56B carries a second indicator member 57B, such as a second hand, so as to be able to indicate the sunset time in cooperation with a scale present on the dial of the watch. Idler wheel 60, because it drives second indicator drive wheel 56B, is also an indicator drive wheel.

Pour les mêmes raisons que celles mentionnées ci-dessus concernant le mécanisme horloger d'affichage de l'heure du lever du soleil, le mécanisme horloger d'affichage de l'heure du coucher du soleil est plus simple à concevoir et plus aisément adaptable à d'autres formes de came, génère moins de frottements et moins de jeux et est plus facile à assembler.For the same reasons as those mentioned above concerning the watch mechanism for displaying the time of sunrise, the watch mechanism for displaying the time of sunset is simpler to design and more easily adaptable to other cam shapes, generates less friction and less backlash and is easier to assemble.

Le mécanisme horloger 20 avec ses deux cames 28A, 28B et ses deux organes suiveurs 36A, 36B permet une mesure précise des heures de lever et de coucher du soleil, en rendant la mesure des heures de lever indépendante de celle des heures de coucher. Cette indépendance des deux mesures permet de tenir compte du fait que les phénomènes de lever et de coucher du soleil ne sont pas parfaitement symétriques.The watch mechanism 20 with its two cams 28A, 28B and its two follower members 36A, 36B allows precise measurement of sunrise and sunset times, by making the measurement of sunrise times independent of that of sunset times. This independence of the two measurements makes it possible to take into account the fact that the phenomena of sunrise and sunset are not perfectly symmetrical.

De préférence, l'ensemble comprenant les organes suiveurs 36A, 36B, les lames flexibles 42A, 42B, les parties rigides mobiles 40A, 40B et la base 48 est réalisé de manière monobloc, par exemple par gravure ionique réactive profonde (DRIE) en silicium ou tout autre matériau approprié, par LIGA (lithographie, galvanoplastie, moulage) en nickel, nickel-phosphore ou tout autre matériau approprié, ou par électroérosion en acier (Durnico® ou autre) ou tout autre matériau approprié, diminuant ainsi le nombre de pièces et facilitant l'assemblage.Preferably, the assembly comprising the follower members 36A, 36B, the flexible blades 42A, 42B, the rigid moving parts 40A, 40B and the base 48 is made in one piece, for example by deep reactive ion etching (DRIE) in silicon or any other suitable material, by LIGA (lithography, electroplating, casting) in nickel, nickel-phosphorus or any other suitable material, or by spark erosion in steel (Durnico ® or other) or any other suitable material, thus reducing the number of parts and facilitating assembly.

Bien que les systèmes à double guidage flexible utilisés dans l'invention décrite ci-dessus soient particulièrement avantageux, l'emploi de systèmes à simple guidage flexible peut être envisagé. Dans ce cas, seulement une paire de lames flexibles serait prévue pour le mécanisme d'affichage de l'heure du lever du soleil, respectivement pour le mécanisme d'affichage de l'heure du coucher du soleil, et ces lames relieraient directement l'organe suiveur correspondant à une base fixe. On peut même envisager de remplacer les systèmes à guidage flexible par des glissières, avec toutefois l'inconvénient d'augmenter les frottements, les jeux et les risques de grippage.Although the double flexible guide systems used in the invention described above are particularly advantageous, the use of single flexible guide systems can be envisaged. In this case, only one pair of flexible blades would be provided for the sunrise time display mechanism, respectively for the sunset time display mechanism, and these blades would directly connect the follower member corresponding to a fixed base. It is even possible to consider replacing the flexible guide systems with slideways, with however the disadvantage of increasing friction, play and the risk of seizing.

Il apparaîtra clairement à l'homme du métier que la présente invention est applicable à d'autres affichages que le lever et le coucher du soleil, en particulier à d'autres affichages d'une information astronomique, par exemple à un affichage des heures de marée.It will clearly appear to those skilled in the art that the present invention is applicable to displays other than sunrise and sunset, in particular to other displays of astronomical information, for example to a display of the hours of tide.

Comme il résulte de ce qui précède, le mécanisme horloger 20 selon l'invention comprend avantageusement une came 28A mise en mouvement autour d'un premier axe de pivotement 26A par un moyen de pivotement 22, des moyens élastiques 42A maintenant un organe suiveur 36A contre la came 28A et une roue d'entraînement d'indicateur 56A montée autour d'un deuxième axe de pivotement 58 et mise en mouvement par l'organe suiveur 36A, l'organe suiveur 36A étant guidé en translation, la roue d'entraînement d'indicateur 56A coopérant avec une face latérale 50A de l'organe suiveur 36A sensiblement parallèle à sa direction de déplacement 52A, de manière à permettre à la came 28A de faire pivoter la roue d'entraînement d'indicateur 56A par l'intermédiaire de l'organe suiveur 36A afin d'indiquer une information. Avantageusement, le mécanisme horloger 20 comprend aussi une autre came 28B mise en mouvement par le moyen de pivotement 22, d'autres moyens élastiques 42B maintenant un autre organe suiveur 36B contre ladite autre came 28B, ledit autre organe suiveur 36B étant guidé en translation, et une autre roue d'entraînement d'indicateur 56B/60 mise en mouvement par ledit autre organe suiveur 36B.As follows from the foregoing, the timepiece mechanism 20 according to the invention advantageously comprises a cam 28A moved about a first pivot axis 26A by a pivot means 22, elastic means 42A holding a follower member 36A against the cam 28A and an indicator drive wheel 56A mounted around a second pivot axis 58 and set in motion by the follower member 36A, the follower member 36A being guided in translation, the drive wheel d indicator 56A cooperating with a side face 50A of the follower member 36A substantially parallel to its direction of movement 52A, so as to allow the cam 28A to cause the indicator drive wheel 56A to pivot via the follower 36A to indicate information. Advantageously, the watch mechanism 20 also comprises another cam 28B set in motion by the pivoting means 22, other elastic means 42B holding another follower member 36B against said other cam 28B, said other follower member 36B being guided in translation, and another indicator drive wheel 56B/60 moved by said other follower 36B.

Claims (15)

  1. Timepiece mechanism (20) for displaying information comprising a first cam (28A) set in motion by a pivot means (22), first elastic means (42A) keeping a first follower (36A) against the first cam (28A), a first indicator drive wheel (56A) set in motion by the first follower (36A), characterised in that it comprises a second cam (28B) set in motion by the pivot means (22), second elastic means (42B) keeping a second follower (36B) against the second cam (28B) and a second indicator drive wheel (60) set in motion by the second follower (36B), the first and second followers (36A, 36B) being guided in translation, the first indicator drive wheel (56A) cooperating with a lateral face (50A) of the first follower (36A) substantially parallel to its direction of displacement (52A) so as to permit the first cam (28A) to cause pivoting of the first indicator drive wheel (56A) by means of the first follower (36A), the second indicator drive wheel (60) cooperating with a lateral face (50B) of the second follower (36B) substantially parallel to its direction of displacement (52B) so as to permit the second cam (28B) to cause pivoting of the second indicator drive wheel (60) by means of the second follower (56B).
  2. Timepiece mechanism (20) as claimed in the preceding claim, characterised in that the first and second followers (36A, 36B) are guided in translation respectively by the first elastic means (42A) and by the second elastic means (42B).
  3. Timepiece mechanism (20) as claimed in any one of the preceding claims, characterised in that the first elastic means (42A) comprise first flexible strips (42A) connecting the first follower (36A) to a frame (49) and the second elastic means (42B) comprise second flexible strips (42B) connecting the second follower (36B) to the frame (49).
  4. Timepiece mechanism (20) as claimed in claim 3, characterised in that the first follower (36A) is connected to a first mobile rigid part (40A) by means of at least two of the first flexible strips (42A), the first mobile rigid part (40A) is connected to the frame (49) by means of at least two others of the first flexible strips (42A), the second follower (36B) is connected to a second mobile rigid part (40B) by means of at least two of the second flexible strips (42B), and the second mobile rigid part (40B) is connected to the frame (49) by means of at least two others of the second flexible strips (42B).
  5. Timepiece mechanism (20) as claimed in claim 4, characterised in that the first flexible strips (42A) are connected to the same lateral face (46A) of the first mobile rigid part (40A) and the second flexible strips (42B) are connected to the same lateral face (46B) of the second mobile rigid part (40B).
  6. Timepiece mechanism (20) as claimed in claim 5, characterised in that the lateral face (46A) of the first mobile rigid part (40A) connected to the first flexible strips (42A) is substantially parallel to the direction (52A) of displacement by the first cam (28A) of the first follower (36A) and the lateral face (46B) of the second mobile rigid part (40B) connected to the second flexible strips (42B) is substantially parallel to the direction (52B) of displacement by the second cam (28B) of the second follower (36B).
  7. Timepiece mechanism (20) as claimed in any one of claims 3 to 6, characterised in that the first flexible strips (42A), at rest, are substantially parallel to each other and the second flexible strips (42B), at rest, are substantially parallel to each other.
  8. Timepiece mechanism (20) as claimed in any one of claims 1 to 7, characterised in that the first elastic means (42A) and the first follower (36A) form part of the same single-piece part and the second elastic means (42B) and the second follower (36B) form part of the same single-piece part.
  9. Timepiece mechanism (20) as claimed in any one of claims 1 to 8, characterised in that the first elastic means (42A), the first follower (36A), the second elastic means (42B) and the second follower (36B) form part of the same single-piece part.
  10. Timepiece mechanism (20) as claimed in any one of claims 1 to 9, characterised in that the second elastic means (42B) are substantially identical to the first elastic means (42A).
  11. Timepiece mechanism (20) as claimed in any one of claims 1 to 10, characterised in that the lateral face (50A) of the first follower (36A) in contact with the first indicator drive wheel (56A) comprises first teeth (54A) so as to form a first rack, the first indicator drive wheel (56A) comprises second teeth which cooperate with the first rack, the lateral face (50B) of the second follower (36B) in contact with the second indicator drive wheel (60) comprises third teeth (54A) so as to form a second rack and the second indicator drive wheel (60) comprises fourth teeth which cooperate with the second rack.
  12. Timepiece mechanism (20) as claimed in any one of claims 1 to 11, characterised in that it further comprises a first indicator member (57A) driven by the first indicator drive wheel (56A), and a second indicator member (57B) driven by the second indicator drive wheel (60), these indicator members (57A, 57B) permitting the display of information on a dial of a watch.
  13. Timepiece mechanism (20) as claimed in any one of claims 1 to 12, characterised in that it permits the display of astronomical information.
  14. Timepiece mechanism (20) as claimed in any one of claims 1 to 13, characterised in that it permits the display of the time of sunrise and sunset.
  15. Watch comprising a timepiece mechanism (20) as claimed in any one of claims 1 to 14.
EP19704047.0A 2018-01-17 2019-01-15 Timepiece mechanism for the display of information Active EP3740821B1 (en)

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EP18152022.2A EP3514633A1 (en) 2018-01-17 2018-01-17 Timepiece mechanism for displaying information
PCT/IB2019/050286 WO2019142090A1 (en) 2018-01-17 2019-01-15 Timepiece mechanism for displaying information

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EP3740821A1 EP3740821A1 (en) 2020-11-25
EP3740821B1 true EP3740821B1 (en) 2022-01-26

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EP4202567A1 (en) 2021-12-22 2023-06-28 Montres Breguet S.A. Assembly of flexible head-to-tail guides for timepiece movement, in particular for a display device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH706767B1 (en) * 2012-07-27 2016-10-14 Richemont Int Sa Control device for retrograde display mechanism.
CH712096A2 (en) * 2016-02-04 2017-08-15 Krayon Sàrl Clockwork movement with astronomical information display.
CH712374A1 (en) * 2016-04-19 2017-10-31 Mft Et Fabrique De Montres Et Chronomètres Ulysse Nardin Le Locle S A Device for displaying the times of sunrise and sunset.

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WO2019142090A1 (en) 2019-07-25
EP3514633A1 (en) 2019-07-24
EP3740821A1 (en) 2020-11-25

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