EP3004991B1 - Timepiece comprising a device for displaying the equation of time - Google Patents

Timepiece comprising a device for displaying the equation of time Download PDF

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Publication number
EP3004991B1
EP3004991B1 EP14729287.4A EP14729287A EP3004991B1 EP 3004991 B1 EP3004991 B1 EP 3004991B1 EP 14729287 A EP14729287 A EP 14729287A EP 3004991 B1 EP3004991 B1 EP 3004991B1
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EP
European Patent Office
Prior art keywords
time
equation
support
index
curve
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EP14729287.4A
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German (de)
French (fr)
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EP3004991A2 (en
Inventor
Christophe NEBOISA
Stephen Forsey
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GFPI SA
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GFPI 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
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/223—Arrangements for indicating different local apparent times; Universal time pieces with rotary disc, rotary bezel, or rotary dial
    • 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
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • 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

Definitions

  • the present invention relates to mechanical timepieces. It relates more particularly to a timepiece comprising a device for displaying the equation of time.
  • the equation of time is a parameter used in astronomy to account for the relative apparent motion of the Sun with respect to the mean sun, which can differ from each other by plus or minus about 15 minutes over the course of a period of time. year. From one year to the next, the annual evolution curve of this parameter is repeated almost identically.
  • Mean solar time is based on the mean sun, defined as an object that, throughout the year, moves on the equator at a constant speed, such that the length of the mean solar day is exactly 24 hours.
  • Solar time or true time is a measurement of time based on the true sun, as given by a sundial.
  • solar noon corresponds to the moment of the day when the Sun reaches its highest point in the sky.
  • the equation of time is the amount that must be added or subtracted each day to pass from true time to mean time, and corresponds, at a given moment, to the difference between mean solar time and true solar time .
  • a positive value of the equation of time indicates that the true sun is lagging behind the mean sun, i.e. more to the east, and a negative value that it is ahead, i.e. that is, more to the west.
  • the equation of time is + 8 minutes, it means that it is 12:08 a.m. of mean solar time when the sundial indicates true noon.
  • An aim of the present invention is to provide a timepiece, such as a wristwatch, allowing a new display of the dynamic and original equation of time.
  • a timepiece such as a wristwatch, comprising a frame and a device for displaying the equation of time.
  • the device for displaying the equation of time comprises a first support and a second support superimposed, respectively mounted movable in rotation with respect to the frame, the first support carrying a curve representative of the equation of time, and the second support carrying an index arranged so that the intersection of the index with the curve is apparent, and means for driving the first and second supports arranged so that the first and second supports rotate at respective speeds allowing to display the value of the equation of time at the intersection of the index with the curve.
  • the first support can be positioned on the display side and comprise a transparent zone on which the curve is represented.
  • the first support can be made of a transparent material.
  • the second support can be positioned on the side of the display and include a transparent zone on which is represented the index.
  • the second support can be made of a transparent material.
  • the first medium can also carry at least one of the cyclical information items linked to time chosen from the group comprising the months, the seasons, the equinoxes, the solstices.
  • the index may be in the form of a graduated scale arranged radially.
  • the index may be in the form of a scale graduated from -16 to + 14.
  • the index may be in the form of a scale graduated from 0 to 16, the curve representative of the equation of time then comprising first zones for which the value of the equation of time indicated by l 'index is negative and of the second zones for which the value of the equation of time indicated by the index is positive.
  • the user will be able to make a quick and easy reading of the equation of time by reading the value of the equation of time at the intersection of the index with the curve of the equation of time.
  • the representation of the entire equation of time curve enables the user to be given the trend of the evolution of the equation of time for the months to come by following the curve represented.
  • a display device 1 of the equation of time used according to the invention comprising a first support 2 and a second support 4 superimposed, respectively mounted to be movable in rotation with respect to the frame.
  • the first and second supports 2 and 4 are respectively solid, concentric discs, subsequently referred to as first disc 2 and second disc 4.
  • the first disc 2 carries a curve 6 representative of the equation of time.
  • the curves making it possible to represent the equation of time being known to those skilled in the art, their determination will not be described here.
  • the curves are however chosen to represent the evolution of the equation of time over a year and to present a closed form.
  • the shape shown on figures 1 to 3 is chosen to represent the equation of time varying from + 14 minutes to - 16 minutes.
  • the first disc 2 also comprises 12 angular sectors 8 regularly distributed corresponding to the 12 months of the year.
  • the name of a month is entered by sector 8.
  • Curve 6 of the equation of time is positioned on the first disk 2 with respect to the months entered in sectors 8.
  • the first disc 2 also comprises 4 angular sectors 10 regularly distributed with respect to the sectors 8 and corresponding to the four seasons. The name of a season is entered by sector 10.
  • the second disc 4 carries an index 12 in the form of a graduated scale arranged radially.
  • the index 12 is in the form of a graduated scale from -16 to + 14.
  • the first disc 2 is made of a transparent material. It is obvious that it would suffice to provide at least one transparent zone on which the curve 6 is represented.
  • said driving means are arranged so that the first and second discs 2 and 4 rotate at respective speeds making it possible to display the value of the equation of time corresponding to the graduation of index 12 at the intersection with curve 6.
  • first disc 2 integral with a first axis 14.
  • Said axis 14 is also integral with a toothed wheel 15 meshing with a toothed wheel 16 of the cog of the movement of the timepiece.
  • the second disc 4 is made integral with a second axis 17, also integral with a toothed wheel 18 meshing with a toothed wheel 19 of the cog of the movement of the timepiece.
  • Those skilled in the art know how to choose the dimensions and the number of teeth of the wheels 15, 16, 18 and 19 so that the first disc 2 rotates at a speed of 330 ° per month and that the second disc 4 rotates at a speed of 360. ° per month.
  • the driving of the first and second discs 2 and 4 can be done by means of any other known driving mechanism, such as a differential, provided that the speed ratios of the first and second discs 2 and 4 are adapted to the equation of time to be displayed, i.e. 11 revolutions per year for the first disc 2 and 12 revolutions per year for the second disc 4.
  • the speed difference between the first and second disks 2 and 4 of 30 ° per month causes a shift between curve 6 of the equation of time and index 12.
  • the user will be able to read the equation of time at the intersection of curve 6 and index 12 at all times.
  • the user reads that for February 11, the value of the equation of time is +14 minutes.
  • the index 12 provided on the second disc 4 is in the form of a graduated scale from 0 to 16.
  • This variant makes it possible to offer easier reading with a scale offering better readability.
  • the curve 6 of the equation of time represented on the first disc 2 comprises first zones 6a for which the value of the equation of time indicated by the index is negative and second zones 6b for which the value of the equation of time indicated by the index is positive.
  • the first zones 6a correspond to the mean solar time lagging behind the true solar time and the second zones 6b correspond to the mean solar time ahead of the true solar time.
  • the zones 6a and 6b can be represented of different color, or according to different patterns, to distinguish them.
  • the first disc 2 carries, as for the first variant, the sectors of the months 8, and the sectors of the seasons 10. In addition, there is provided a representation of the equinoxes and solstices in the form of a cross 20 carried by the first. disc 2.
  • the first disc 2 is made of a transparent material and the second disc 4 comprises around the index 12 a colored zone 22 improving the contrast to facilitate the reading of the equation of time.
  • the second disc 4 also comprises a colored peripheral zone 24 improving the contrast to facilitate the reading of the months, the seasons, the equinoxes and the solstices.
  • the user reads that for February 11, the value of the equation of time is +14 minutes since the index is in an area for which the values of the equation of time are positive.
  • first and second discs 2 and 4 can be clockwise or counterclockwise, depending on the desired configuration.
  • the shape of the equation of time curve can be modified by adapting in particular the speed ratios between the first and second discs.
  • the shape of the equation of time curve 6 can be represented in the form of a so-called “standard” polar curve (as represented on the figures 1 to 3 ), but also in the form of an inverted absolute polar curve (as represented on the figure 5 ) or in the form of an absolute polar curve (as represented on the figure 6 ).
  • standard as represented on the figures 1 to 3
  • an inverted absolute polar curve as represented on the figure 5
  • an absolute polar curve as represented on the figure 6
  • the first disc 2 is positioned above the second disc 4, on the dial side, as close as possible to the gaze of a user who is looking at the display.
  • the second disc can be positioned on the display side and include a transparent zone on which the index is represented.
  • the second disc is made of a transparent material.
  • the first support can also be in the form of a circular element resulting from a photolithography process comprising the curve as well as the inscriptions (months, years, solstices, etc ... ) cut out and without a physical substrate, only the arms of the first support connecting the rim to the central hub.
  • the second support may be in the form of an element resulting from a photolithography process comprising only the scale. cut out.
  • the second support could also be in the form of a needle directly carrying the graduated scale.
  • first and second supports can be arranged non-concentrically.
  • the second support is then in the form of a satellite arranged non-concentrically with respect to the first support.
  • the second support comprises an external toothing arranged to cooperate on the one hand with an internal toothing provided on the first support and on the other hand with the toothing of an additional pinion mounted fixed or movable on the frame.
  • the second support comprises a graduation (+14; -16) adapted as a function of the shape of the curve representative of the equation of time as well as of the relative rotational speeds between the first support and the second support.
  • the first support When the first support is driven in rotation, it engages, through its internal teeth, with the external teeth of the second support, which will therefore also start to rotate and mesh with the teeth of the additional pinion.
  • the second support will rotate around its own axis and around the additional pinion.
  • the equation of time will be read at the intersection of the curve representative of the equation of time carried by the first support and the graduation carried by the second support. The reading will then take place each time at a different location around the first support.
  • the second support will rotate around its own axis, but without rotating around the additional pinion.
  • the equation of time will always be read at the intersection of the curve representative of the equation of time and the graduation carried by the second support, but in this case always at the same place on the first support.

Description

Domaine techniqueTechnical area

La présente invention se rapporte aux pièces d'horlogerie mécaniques. Elle concerne plus particulièrement une pièce d'horlogerie comprenant un dispositif d'affichage de l'équation du temps.The present invention relates to mechanical timepieces. It relates more particularly to a timepiece comprising a device for displaying the equation of time.

Etat de la techniqueState of the art

L'équation du temps est un paramètre utilisé en astronomie pour rendre compte du mouvement apparent relatif du Soleil par rapport au soleil moyen, lesquels peuvent différer l'un par rapport à l'autre de plus ou moins 15 minutes environ au cours d'une année. D'une année sur l'autre, la courbe d'évolution annuelle de ce paramètre se répète quasiment à l'identique.The equation of time is a parameter used in astronomy to account for the relative apparent motion of the Sun with respect to the mean sun, which can differ from each other by plus or minus about 15 minutes over the course of a period of time. year. From one year to the next, the annual evolution curve of this parameter is repeated almost identically.

Le temps solaire moyen est basé sur le soleil moyen, défini comme un objet qui, tout au long de l'année, se déplacerait sur l'équateur à une vitesse constante, telle que la durée du jour solaire moyen soit de 24 heures exactement.Mean solar time is based on the mean sun, defined as an object that, throughout the year, moves on the equator at a constant speed, such that the length of the mean solar day is exactly 24 hours.

Le temps solaire ou temps vrai est une mesure du temps basée sur le soleil vrai, tel que donné par un cadran solaire. En particulier, le midi solaire correspond à l'instant de la journée où le Soleil atteint son point le plus élevé dans le ciel.Solar time or true time is a measurement of time based on the true sun, as given by a sundial. In particular, solar noon corresponds to the moment of the day when the Sun reaches its highest point in the sky.

Par convention, l'équation du temps est la quantité qu'il faut chaque jour ajouter ou retrancher pour passer du temps vrai au temps moyen, et correspond, à un instant donné, à la différence entre le temps solaire moyen et le temps solaire vrai.By convention, the equation of time is the amount that must be added or subtracted each day to pass from true time to mean time, and corresponds, at a given moment, to the difference between mean solar time and true solar time .

Une valeur positive de l'équation du temps indique que le soleil vrai est en retard sur le soleil moyen, c'est-à-dire plus à l'est, et une valeur négative qu'il est en avance, c'est-à-dire plus à l'ouest. Par exemple, lorsque l'équation du temps vaut + 8 minutes, cela signifie qu'il est 12 h 08 du temps solaire moyen lorsque le cadran solaire indique midi vrai.A positive value of the equation of time indicates that the true sun is lagging behind the mean sun, i.e. more to the east, and a negative value that it is ahead, i.e. that is, more to the west. For example, when the equation of time is + 8 minutes, it means that it is 12:08 a.m. of mean solar time when the sundial indicates true noon.

Il existe déjà différents modes d'affichage de l'équation du temps qui utilisent généralement une aiguille commandée par une came de l'équation du temps prévue à l'intérieur d'un mouvement horloger, ladite aiguille se déplaçant le long de graduations fixes affichées sur le cadran, pour permettre d'afficher la valeur de l'équation du temps. Une telle complication est par exemple représentée schématiquement par I. Vardi « La marche du soleil - Un affichage naturel de l'équation du temps », Bulletin de la Société suisse de Chronométrie, SSC, Neuchâtel, CH, n° 62, 1 décembre 2009, pages 37-44 . Toutefois, selon cette construction, l'aiguille indiquant l'équation du temps ne donne aucune tendance de l'évolution de l'équation du temps pour les mois à venir. L'utilisateur ne sait pas si la différence entre le temps solaire moyen et le temps solaire vrai va diminuer, ou au contraire va augmenter.There are already different display modes of the equation of time which usually use a hand controlled by an equation of time cam. provided inside a watch movement, said hand moving along fixed graduations displayed on the dial, to allow the value of the equation of time to be displayed. Such a complication is for example represented schematically by I. Vardi "The march of the sun - A natural display of the equation of time", Bulletin of the Swiss Chronometry Society, SSC, Neuchâtel, CH, n ° 62, December 1, 2009, pages 37-44 . However, according to this construction, the hand indicating the equation of time gives no trend of the evolution of the equation of time for the months to come. The user does not know if the difference between the mean solar time and the true solar time will decrease, or on the contrary will increase.

Un but de la présente invention est de proposer une pièce d'horlogerie, telle qu'une montre bracelet, permettant un nouvel affichage de l'équation du temps dynamique et original.An aim of the present invention is to provide a timepiece, such as a wristwatch, allowing a new display of the dynamic and original equation of time.

Divulgation de l'inventionDisclosure of the invention

A cet effet, et conformément à la présente invention, il est proposé une pièce d'horlogerie, telle qu'une montre-bracelet, comprenant un bâti et un dispositif d'affichage de l'équation du temps.To this end, and in accordance with the present invention, there is provided a timepiece, such as a wristwatch, comprising a frame and a device for displaying the equation of time.

Selon l'invention, le dispositif d'affichage de l'équation du temps comprend un premier support et un second support superposés, respectivement montés mobiles en rotation par rapport au bâti, le premier support portant une courbe représentative de l'équation du temps, et le second support portant un index agencé pour que l'intersection de l'index avec la courbe soit apparente, et des moyens d'entrainement des premier et second supports agencés pour que les premier et second supports tournent à des vitesses respectives permettant d'afficher la valeur de l'équation du temps à l'intersection de l'index avec la courbe.According to the invention, the device for displaying the equation of time comprises a first support and a second support superimposed, respectively mounted movable in rotation with respect to the frame, the first support carrying a curve representative of the equation of time, and the second support carrying an index arranged so that the intersection of the index with the curve is apparent, and means for driving the first and second supports arranged so that the first and second supports rotate at respective speeds allowing to display the value of the equation of time at the intersection of the index with the curve.

Selon une première variante, le premier support peut être positionné du côté de l'affichage et comprendre une zone transparente sur laquelle est représentée la courbe. Avantageusement, le premier support peut être réalisé dans un matériau transparent.According to a first variant, the first support can be positioned on the display side and comprise a transparent zone on which the curve is represented. Advantageously, the first support can be made of a transparent material.

Selon une deuxième variante, le second support peut être positionné du côté de l'affichage et comprendre une zone transparente sur laquelle est représenté l'index. Avantageusement, le second support peut être réalisé dans un matériau transparent.According to a second variant, the second support can be positioned on the side of the display and include a transparent zone on which is represented the index. Advantageously, the second support can be made of a transparent material.

D'une manière avantageuse, le premier support peut porter également au moins l'une des informations cycliques liées au temps choisies parmi le groupe comprenant les mois, les saisons, les équinoxes, les solstices.Advantageously, the first medium can also carry at least one of the cyclical information items linked to time chosen from the group comprising the months, the seasons, the equinoxes, the solstices.

De préférence, l'index peut se présenter sous la forme d'une échelle graduée disposée radialement.Preferably, the index may be in the form of a graduated scale arranged radially.

Selon une variante, l'index peut être sous la forme d'une échelle graduée de -16 à + 14.According to one variant, the index may be in the form of a scale graduated from -16 to + 14.

Selon une autre variante, l'index peut être sous la forme d'une échelle graduée de 0 à 16, la courbe représentative de l'équation du temps comprenant alors des premières zones pour lesquelles la valeur de l'équation du temps indiquée par l'index est négative et des deuxièmes zones pour lesquelles la valeur de l'équation du temps indiquée par l'index est positive.According to another variant, the index may be in the form of a scale graduated from 0 to 16, the curve representative of the equation of time then comprising first zones for which the value of the equation of time indicated by l 'index is negative and of the second zones for which the value of the equation of time indicated by the index is positive.

Ainsi, à tout moment, l'utilisateur pourra faire une lecture simple et rapide de l'équation du temps en lisant la valeur de l'équation du temps à l'intersection de l'index avec la courbe d'équation du temps.Thus, at any time, the user will be able to make a quick and easy reading of the equation of time by reading the value of the equation of time at the intersection of the index with the curve of the equation of time.

De plus, la représentation de la totalité de la courbe d'équation du temps permet de donner à l'utilisateur la tendance de l'évolution de l'équation du temps pour les mois à venir en suivant la courbe représentée.In addition, the representation of the entire equation of time curve enables the user to be given the trend of the evolution of the equation of time for the months to come by following the curve represented.

Brève description des dessinsBrief description of the drawings

L'invention sera mieux comprise à la lecture de la description qui va suivre, de modes de réalisation, donnés à titre d'exemples et faits en référence aux dessins dans lesquels:

  • les figures 1 à 3 représentent une première forme de réalisation de l'affichage de l'équation du temps à différentes périodes de l'année,
  • la figure 4 représente une vue schématique du dispositif d'affichage utilisé dans la présente invention,
  • la figure 5 représente une deuxième forme de réalisation de l'affichage de l'équation du temps, et
  • la figure 6 représente une troisième forme de réalisation de l'affichage de l'équation du temps.
The invention will be better understood on reading the following description of embodiments, given by way of examples and made with reference to the drawings in which:
  • the figures 1 to 3 represent a first embodiment of the display of the equation of time at different periods of the year,
  • the figure 4 represents a schematic view of the display device used in the present invention,
  • the figure 5 shows a second embodiment of the display of the equation of time, and
  • the figure 6 shows a third embodiment of the display of the equation of time.

Mode(s) de réalisation de l'inventionMode (s) for carrying out the invention

En référence aux figures 1 et 4, il est représenté un dispositif d'affichage 1 de l'équation du temps utilisé selon l'invention et comprenant un premier support 2 et un second support 4 superposés, respectivement montés mobiles en rotation par rapport au bâti. Dans cette variante de réalisation, les premier et second supports 2 et 4 sont respectivement des disques pleins, concentriques, référencés par la suite premier disque 2 et second disque 4.With reference to figures 1 and 4 , there is shown a display device 1 of the equation of time used according to the invention and comprising a first support 2 and a second support 4 superimposed, respectively mounted to be movable in rotation with respect to the frame. In this variant embodiment, the first and second supports 2 and 4 are respectively solid, concentric discs, subsequently referred to as first disc 2 and second disc 4.

Le premier disque 2 porte une courbe 6 représentative de l'équation du temps. Les courbes permettant de représenter l'équation du temps étant connues de l'homme du métier, leur détermination ne sera pas décrite ici. Les courbes sont toutefois choisies pour représenter l'évolution de l'équation du temps sur une année et pour présenter une forme fermée. La forme représentée sur les figures 1 à 3 est choisie pour représenter l'équation du temps variant de + 14 minutes à - 16 minutes.The first disc 2 carries a curve 6 representative of the equation of time. The curves making it possible to represent the equation of time being known to those skilled in the art, their determination will not be described here. The curves are however chosen to represent the evolution of the equation of time over a year and to present a closed form. The shape shown on figures 1 to 3 is chosen to represent the equation of time varying from + 14 minutes to - 16 minutes.

Le premier disque 2 comprend également 12 secteurs angulaires 8 régulièrement répartis correspondant aux 12 mois de l'année. Le nom d'un mois est inscrit par secteur 8. La courbe 6 de l'équation du temps est positionnée sur le premier disque 2 par rapport aux mois inscrits dans les secteurs 8.The first disc 2 also comprises 12 angular sectors 8 regularly distributed corresponding to the 12 months of the year. The name of a month is entered by sector 8. Curve 6 of the equation of time is positioned on the first disk 2 with respect to the months entered in sectors 8.

Le premier disque 2 comprend également 4 secteurs angulaires 10 régulièrement répartis par rapport aux secteurs 8 et correspondant aux quatre saisons. Le nom d'une saison est inscrit par secteur 10.The first disc 2 also comprises 4 angular sectors 10 regularly distributed with respect to the sectors 8 and corresponding to the four seasons. The name of a season is entered by sector 10.

Le second disque 4 porte un index 12 se présentant sous la forme d'une échelle graduée disposée radialement.The second disc 4 carries an index 12 in the form of a graduated scale arranged radially.

Dans la variante représentée sur les figures 1 à 3, l'index 12 est sous la forme d'une échelle graduée de -16 à + 14.In the variant shown on figures 1 to 3 , the index 12 is in the form of a graduated scale from -16 to + 14.

Afin de laisser visibles tous les points d'intersection de l'index 12 avec la courbe d'équation du temps 6, le premier disque 2 est réalisé dans un matériau transparent. Il est bien évident qu'il suffirait de prévoir au moins une zone transparente sur laquelle est représentée la courbe 6.In order to leave visible all the points of intersection of the index 12 with the equation of time curve 6, the first disc 2 is made of a transparent material. It is obvious that it would suffice to provide at least one transparent zone on which the curve 6 is represented.

Il est également prévu des moyens d'entrainement du premier disque 2 et du deuxième disque 4. Selon l'invention, lesdits moyens d'entrainement sont agencés pour que les premier et deuxième disques 2 et 4 tournent à des vitesses respectives permettant d'afficher la valeur de l'équation du temps correspondant à la graduation de l'index 12 à l'intersection avec la courbe 6.There are also provided means for driving the first disc 2 and the second disc 4. According to the invention, said driving means are arranged so that the first and second discs 2 and 4 rotate at respective speeds making it possible to display the value of the equation of time corresponding to the graduation of index 12 at the intersection with curve 6.

En référence à la figure 4, une construction possible est de rendre solidaire le premier disque 2 d'un premier axe 14. Ledit axe 14 est également solidaire d'une roue dentée 15 engrenant avec une roue dentée 16 du rouage du mouvement de la pièce d'horlogerie. De même, le second disque 4 est rendu solidaire d'un second axe 17, également solidaire d'une roue dentée 18 engrenant avec une roue dentée 19 du rouage du mouvement de la pièce d'horlogerie. L'homme du métier sait choisir les dimensions et le nombre de dents des roues 15, 16, 18 et 19 pour que le premier disque 2 tourne à une vitesse de 330° par mois et que le second disque 4 tourne à une vitesse de 360° par mois. Il est bien évident que l'entrainement des premier et second disques 2 et 4 peut se faire par le biais de tout autre mécanisme d'entrainement connu, tel qu'un différentiel, à condition que les rapports de vitesse des premier et second disques 2 et 4 soient adaptés à l'équation du temps à afficher, soit 11 tours par an pour le premier disque 2 et 12 tours par an pour le second disque 4.With reference to the figure 4 , one possible construction is to make the first disc 2 integral with a first axis 14. Said axis 14 is also integral with a toothed wheel 15 meshing with a toothed wheel 16 of the cog of the movement of the timepiece. Likewise, the second disc 4 is made integral with a second axis 17, also integral with a toothed wheel 18 meshing with a toothed wheel 19 of the cog of the movement of the timepiece. Those skilled in the art know how to choose the dimensions and the number of teeth of the wheels 15, 16, 18 and 19 so that the first disc 2 rotates at a speed of 330 ° per month and that the second disc 4 rotates at a speed of 360. ° per month. It is obvious that the driving of the first and second discs 2 and 4 can be done by means of any other known driving mechanism, such as a differential, provided that the speed ratios of the first and second discs 2 and 4 are adapted to the equation of time to be displayed, i.e. 11 revolutions per year for the first disc 2 and 12 revolutions per year for the second disc 4.

La différence de vitesse entre les premier et second disques 2 et 4 de 30° par mois provoque un décalage entre la courbe 6 de l'équation du temps et l'index 12. L'utilisateur pourra lire l'équation du temps à l'intersection de la courbe 6 et de l'index 12 en tout temps.The speed difference between the first and second disks 2 and 4 of 30 ° per month causes a shift between curve 6 of the equation of time and index 12. The user will be able to read the equation of time at the intersection of curve 6 and index 12 at all times.

Ainsi, selon la figure 1, l'utilisateur lit que pour le 11 février, la valeur de l'équation du temps est +14 minutes.Thus, according to the figure 1 , the user reads that for February 11, the value of the equation of time is +14 minutes.

Selon la figure 2, l'utilisateur lit que pour le 16 avril, la valeur de l'équation du temps est 0 minute.According to figure 2 , the user reads that for April 16, the value of the equation of time is 0 minutes.

Selon la figure 3, l'utilisateur lit que pour le 4 novembre, la valeur de l'équation du temps est -16 minutes.According to figure 3 , the user reads that for November 4, the value of the equation of time is -16 minutes.

En référence à la figure 5, il est représenté une autre variante de réalisation de la pièce selon l'invention, selon laquelle l'index 12 prévu sur le second disque 4 est sous la forme d'une échelle graduée de 0 à 16. Cette variante permet d'offrir une lecture plus aisée avec une échelle offrant une meilleure lisibilité.With reference to the figure 5 , there is shown another variant embodiment of the part according to the invention, according to which the index 12 provided on the second disc 4 is in the form of a graduated scale from 0 to 16. This variant makes it possible to offer easier reading with a scale offering better readability.

Dans ce cas, la courbe 6 de l'équation du temps représentée sur le premier disque 2 comprend des premières zones 6a pour lesquelles la valeur de l'équation du temps indiquée par l'index est négative et des deuxièmes zones 6b pour lesquelles la valeur de l'équation du temps indiquée par l'index est positive.In this case, the curve 6 of the equation of time represented on the first disc 2 comprises first zones 6a for which the value of the equation of time indicated by the index is negative and second zones 6b for which the value of the equation of time indicated by the index is positive.

Ainsi, les premières zones 6a correspondent au temps solaire moyen en retard par rapport au temps solaire vrai et les deuxièmes zones 6b correspondent au temps solaire moyen en avance par rapport au temps solaire vrai. Les zones 6a et 6b peuvent être représentées de couleur différente, ou selon des motifs différents, pour les distinguer.Thus, the first zones 6a correspond to the mean solar time lagging behind the true solar time and the second zones 6b correspond to the mean solar time ahead of the true solar time. The zones 6a and 6b can be represented of different color, or according to different patterns, to distinguish them.

Le premier disque 2 porte, comme pour la première variante, les secteurs des mois 8, et les secteurs des saisons 10. De plus, il est prévu une représentation des équinoxes et des solstices sous la forme d'une croix 20 portée par le premier disque 2.The first disc 2 carries, as for the first variant, the sectors of the months 8, and the sectors of the seasons 10. In addition, there is provided a representation of the equinoxes and solstices in the form of a cross 20 carried by the first. disc 2.

Le premier disque 2 est réalisé dans un matériau transparent et le second disque 4 comprend autour de l'index 12 une zone colorée 22 améliorant le contraste pour faciliter la lecture de l'équation du temps. Le second disque 4 comprend également une zone périphérique colorée 24 améliorant le contraste pour faciliter la lecture des mois, des saisons, des équinoxes et des solstices.The first disc 2 is made of a transparent material and the second disc 4 comprises around the index 12 a colored zone 22 improving the contrast to facilitate the reading of the equation of time. The second disc 4 also comprises a colored peripheral zone 24 improving the contrast to facilitate the reading of the months, the seasons, the equinoxes and the solstices.

Ainsi, selon la figure 5, l'utilisateur lit que pour le 11 février, la valeur de l'équation du temps est +14 minutes puisque l'index se trouve dans une zone pour laquelle les valeurs de l'équation du temps sont positives.Thus, according to the figure 5 , the user reads that for February 11, the value of the equation of time is +14 minutes since the index is in an area for which the values of the equation of time are positive.

Il est bien évident que le sens de rotation des premier et second disques 2 et 4 peut être horaire ou antihoraire, selon la configuration souhaitée.It is obvious that the direction of rotation of the first and second discs 2 and 4 can be clockwise or counterclockwise, depending on the desired configuration.

Ainsi, il est représenté sur la figure 6, une autre variante de réalisation selon l'invention. Les références indiquent les mêmes éléments que ceux décrits ci-dessus. Dans cette variante, le sens de rotation du système est antihoraire. Les indications se trouvant sur le premier disque 2, telles que les saisons, les mois, les solstices et les équinoxes, sont inversées.Thus, it is represented on the figure 6 , another variant embodiment according to the invention. The references indicate the same elements as those described above. In this variant, the direction of rotation of the system is counterclockwise. The indications on the first disc 2, such as seasons, months, solstices and equinoxes, are reversed.

Il est bien évident également que la forme de la courbe d'équation du temps peut être modifiée en adaptant notamment les rapports de vitesse entre les premier et second disques. D'une manière générale, la forme de la courbe d'équation du temps 6 peut être représentée sous la forme d'une courbe polaire dite « standard » (telle que représentée sur les figures 1 à 3), mais également sous la forme d'une courbe polaire absolue inversée (telle que représentée sur la figure 5) ou encore sous la forme d'une courbe polaire absolue (telle que représentée sur la figure 6). L'homme du métier connait d'autres formes de la courbe d'équation du temps qu'il pourra utiliser selon ses préférences.It is also quite obvious that the shape of the equation of time curve can be modified by adapting in particular the speed ratios between the first and second discs. In general, the shape of the equation of time curve 6 can be represented in the form of a so-called “standard” polar curve (as represented on the figures 1 to 3 ), but also in the form of an inverted absolute polar curve (as represented on the figure 5 ) or in the form of an absolute polar curve (as represented on the figure 6 ). Those skilled in the art are aware of other forms of the equation of time curve which they can use according to their preferences.

Dans les variantes ici représentées, le premier disque 2 est positionné au-dessus du second disque 4, côté cadran, au plus près du regard d'un utilisateur qui regarde l'affichage.In the variants shown here, the first disc 2 is positioned above the second disc 4, on the dial side, as close as possible to the gaze of a user who is looking at the display.

Il est bien évident qu'une construction inverse est possible en adaptant les zones de transparence pour permettre de rendre visible chacun des points d'intersection de la courbe d'équation du temps avec l'index.It is obvious that an inverse construction is possible by adapting the transparency zones to make it possible to make visible each of the points of intersection of the equation of time curve with the index.

Plus particulièrement, le second disque peut être positionné du côté de l'affichage et comprendre une zone transparente sur laquelle est représenté l'index. Avantageusement, le second disque est réalisé dans un matériau transparent.More particularly, the second disc can be positioned on the display side and include a transparent zone on which the index is represented. Advantageously, the second disc is made of a transparent material.

Il est également possible de prévoir un empilement de plusieurs disques transparents permettant d'afficher différentes informations par superposition.It is also possible to provide a stack of several transparent disks making it possible to display different information by superposition.

Selon d'autres variantes de réalisation non représentées, le premier support peut également se présenter sous la forme d'un élément circulaire issu d'un procédé de photolithographie comportant la courbe ainsi que les inscriptions (mois, années, solstices, etc...) détourées et sans substrat physique, seuls les bras du premier support reliant la serge au moyeu central.According to other variant embodiments not shown, the first support can also be in the form of a circular element resulting from a photolithography process comprising the curve as well as the inscriptions (months, years, solstices, etc ... ) cut out and without a physical substrate, only the arms of the first support connecting the rim to the central hub.

De même le second support peut se présenter sous la forme d'un élément issu d'un procédé de photolithographie comportant seulement l'échelle détourée. Le second support pourrait également se présenter sous la forme d'une aiguille portant directement l'échelle graduée.Likewise, the second support may be in the form of an element resulting from a photolithography process comprising only the scale. cut out. The second support could also be in the form of a needle directly carrying the graduated scale.

Dans une autre variante de réalisation non représentée, les premier et second supports peuvent être agencés de manière non concentrique. Le second support se présente alors sous la forme d'un satellite disposé de manière non concentrique par rapport au premier support. Le second support comporte une denture extérieure agencée pour coopérer d'une part avec une denture intérieure prévue sur le premier support et d'autre part avec la denture d'un pignon additionnel monté fixe ou mobile sur le bâti. Le second support comporte une graduation (+14 ; -16) adaptée en fonction de la forme de la courbe représentative de l'équation du temps ainsi que des vitesses de rotation relatives entre le premier support et le second support.In another alternative embodiment not shown, the first and second supports can be arranged non-concentrically. The second support is then in the form of a satellite arranged non-concentrically with respect to the first support. The second support comprises an external toothing arranged to cooperate on the one hand with an internal toothing provided on the first support and on the other hand with the toothing of an additional pinion mounted fixed or movable on the frame. The second support comprises a graduation (+14; -16) adapted as a function of the shape of the curve representative of the equation of time as well as of the relative rotational speeds between the first support and the second support.

Lorsque le premier support est entraîné en rotation, il engrène, par le biais de sa denture intérieure, avec la denture extérieure du second support, qui va donc également se mettre à tourner et engrener avec la denture du pignon additionnel.When the first support is driven in rotation, it engages, through its internal teeth, with the external teeth of the second support, which will therefore also start to rotate and mesh with the teeth of the additional pinion.

Si ce pignon additionnel est fixe, le second support va tourner autour de son propre axe et autour du pignon additionnel. La lecture de l'équation du temps se fera à l'intersection de la courbe représentative de l'équation du temps portée par le premier support et de la graduation portée par le second support. La lecture se fera alors à chaque fois à un autre endroit autour du premier support.If this additional pinion is fixed, the second support will rotate around its own axis and around the additional pinion. The equation of time will be read at the intersection of the curve representative of the equation of time carried by the first support and the graduation carried by the second support. The reading will then take place each time at a different location around the first support.

Si le pignon additionnel est mobile, le second support va tourner autour de son propre axe, mais sans tourner autour du pignon additionnel. La lecture de l'équation du temps se fera toujours à l'intersection de la courbe représentative de l'équation du temps et de la graduation portée par le second support, mais dans ce cas toujours au même endroit sur le premier support.If the additional pinion is movable, the second support will rotate around its own axis, but without rotating around the additional pinion. The equation of time will always be read at the intersection of the curve representative of the equation of time and the graduation carried by the second support, but in this case always at the same place on the first support.

Claims (10)

  1. Timepiece comprising a frame and a device (1) for displaying the equation of time, in which the device (1) for displaying the equation of time comprises a first support (2) and a second support (4) that are superposed, respectively mounted so that they are able to rotate relative to the frame, the first support (2) bearing a curve (6) representing the equation of time, and the second support (4) bearing an index (12) arranged so that the intersection of the index (12) with the curve (6) is visible, and means for driving the first (2) and second (4) supports arranged so that the first (2) and second (4) supports rotate at respective speeds that make it possible to display the value of the equation of time at the intersection of the index (12) with the curve (6).
  2. Timepiece according to Claim 1, characterized in that the first support (2) is positioned on the side of the display and comprises a transparent zone on which the curve (6) is shown.
  3. Timepiece according to Claim 2, characterized in that the first support (2) is made from a transparent material.
  4. Timepiece according to Claim 1, characterized in that the second support (4) is positioned on the side of the display and comprises a transparent zone on which the index (12) is shown.
  5. Timepiece according to Claim 4, characterized in that the second support (4) is made from a transparent material.
  6. Timepiece according to any one of the preceding claims, characterized in that the first support (2) also bears at least one of the pieces of cyclical information relating to time selected from the group comprising the months, the seasons, the equinoxes and the solstices.
  7. Timepiece according to any one of the preceding claims, characterized in that the index (12) takes the form of a radially-positioned graduated scale.
  8. Timepiece according to Claim 7, characterized in that the index (12) is in the form of a graduated scale from -16 to +14.
  9. Timepiece according to Claim 7, characterized in that the index (12) is in the form of a graduated scale from 0 to 16, and in that the curve (6) representing the equation of time comprises first zones (6a) for which the value of the equation of time indicated by the index (12) is negative and second zones (6b) for which the value of the equation of time indicated by the index (12) is positive.
  10. Timepiece according to any one of the preceding claims, characterized in that the first support (2) rotates at a speed of 330° per month and in that the second support (4) rotates at a speed of 360° per month.
EP14729287.4A 2013-06-06 2014-06-05 Timepiece comprising a device for displaying the equation of time Active EP3004991B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01076/13A CH708215B1 (en) 2013-06-06 2013-06-06 Timepiece comprising a device for displaying the equation of time.
PCT/EP2014/061684 WO2014195403A2 (en) 2013-06-06 2014-06-05 Timepiece comprising a device for displaying the equation of time

Publications (2)

Publication Number Publication Date
EP3004991A2 EP3004991A2 (en) 2016-04-13
EP3004991B1 true EP3004991B1 (en) 2021-11-03

Family

ID=48578733

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Application Number Title Priority Date Filing Date
EP14729287.4A Active EP3004991B1 (en) 2013-06-06 2014-06-05 Timepiece comprising a device for displaying the equation of time

Country Status (4)

Country Link
US (1) US9483023B2 (en)
EP (1) EP3004991B1 (en)
CH (1) CH708215B1 (en)
WO (1) WO2014195403A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3270236B1 (en) * 2016-07-15 2020-02-12 Montres Breguet S.A. Running time equation mechanism controlled by a differential device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2192750A (en) * 1938-11-21 1940-03-05 Everett K Mead Clock time sundial
US3303567A (en) * 1963-11-01 1967-02-14 John P Blanks Sun dial
US4645354A (en) * 1986-02-26 1987-02-24 J. R. Mercer P.E. Company Universal heliochronometer
CH696218A5 (en) * 2001-08-07 2007-02-15 Piguet Frederic Sa Timepiece in calendar including a running equation of time device.
US6523270B1 (en) * 2001-08-08 2003-02-25 University Of Hong Kong Universal heliodon-sundial
EP2503412B1 (en) * 2011-03-23 2013-08-28 Montres Breguet SA Uhrwerk, das eine Vorrichtung mit fortschreitender Zeitgleichung umfasst
CN104246627B (en) * 2012-02-27 2017-02-22 布朗潘有限公司 Universal running equation of time mechanism, and method for setting such a mechanism

Also Published As

Publication number Publication date
WO2014195403A2 (en) 2014-12-11
US9483023B2 (en) 2016-11-01
CH708215A8 (en) 2015-03-13
CH708215B1 (en) 2018-02-15
EP3004991A2 (en) 2016-04-13
US20160124387A1 (en) 2016-05-05
WO2014195403A3 (en) 2015-06-25
CH708215A1 (en) 2014-12-15

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