EP1612625B1 - Power reserve indicator for a mechanical timepiece - Google Patents

Power reserve indicator for a mechanical timepiece Download PDF

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Publication number
EP1612625B1
EP1612625B1 EP04405403A EP04405403A EP1612625B1 EP 1612625 B1 EP1612625 B1 EP 1612625B1 EP 04405403 A EP04405403 A EP 04405403A EP 04405403 A EP04405403 A EP 04405403A EP 1612625 B1 EP1612625 B1 EP 1612625B1
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EP
European Patent Office
Prior art keywords
wheel
mechanism according
spring
display
driven
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP04405403A
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German (de)
French (fr)
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EP1612625A1 (en
Inventor
Laurent Besse
Hugo Lopez
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Watch-U-License AG
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Watch-U-Licence AG
Watch U Licence AG
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Application filed by Watch-U-Licence AG, Watch U Licence AG filed Critical Watch-U-Licence AG
Priority to AT04405403T priority Critical patent/ATE402430T1/en
Priority to EP04405403A priority patent/EP1612625B1/en
Priority to DE602004015267T priority patent/DE602004015267D1/en
Priority to PCT/EP2005/052521 priority patent/WO2006013120A1/en
Publication of EP1612625A1 publication Critical patent/EP1612625A1/en
Application granted granted Critical
Publication of EP1612625B1 publication Critical patent/EP1612625B1/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
    • G04B9/00—Supervision of the state of winding, e.g. indicating the amount of winding
    • G04B9/005—Supervision of the state of winding, e.g. indicating the amount of winding by optical indication of the amount of winding

Definitions

  • the present invention relates to the field of mechanical watchmaking. It relates, more particularly, to a power reserve indicator mechanism of a mechanical watch movement, that is to say a mechanism for providing information on the amount of mechanical energy stored in the mainspring contained in his barrel CH 685 963 shows a timepiece that is driven by a high energy source consisting of two barrels in series.
  • a power reserve indicator mechanism of a mechanical watch movement that is to say a mechanism for providing information on the amount of mechanical energy stored in the mainspring contained in his barrel CH 685 963 shows a timepiece that is driven by a high energy source consisting of two barrels in series.
  • each barrel is equipped with a differential which one of the input mobile is coupled to the respective barrel shaft and the other mobile input is connected to the mobile of corresponding entry of the other barrel.
  • the two input mobiles are coupled together to the outer toothing of the cylinder which is engaged with the input wheel of the finishing train of the part.
  • such a mechanism comprises a power reserve indicator and a differential gear with a first input movable (ratchet) rotated during the clamping of the spring, a second input movable rotated during the disarming of the spring and an output mobile connected to the power reserve indicator, driving it in a first direction during winding and in a second direction during disarming.
  • the indicator is likely to traverse a given angle between two extreme positions, the first of which is occupied when the spring is fully armed and the second when it is completely disarmed.
  • the display thus procured does not translate sufficiently clearly the decrease in the amount of energy stored.
  • the visual effect is, in fact, substantially the same as if the movement had a single large capacity spring whose power reserve indicator would be divided into two synchronous displays.
  • the present invention aims to provide a power reserve indicator mechanism for displaying information on the amount of energy stored in the movement of the mainspring by means of several independent indicators.
  • the mechanism further comprises a counting member driven by the differential output mobile, each display train being moved successively by the counting member to respectively indicate complementary lower and upper fractions of the spring power reserve.
  • the counting member comprises a wheel performing a revolution in a period substantially equal to the walking capacity provided by the spring.
  • the first cylinder is kinematically coupled to a second cylinder.
  • the second board of the wheel of the counting member may be toothed on half of its periphery and the points of engagement of this board with the display trains are diametrically opposed.
  • the first and second display trains are respectively arranged to indicate when the power reserve is between 0 and 50% and between 50 and 100% of the walking capacity.
  • FIG 2 illustrates an exemplary implementation of the invention applied to a movement with first and second barrels 10a and 10b.
  • the plate and the bridges between which the various mobiles are pivoted have not been represented since this is a normal knowledge of the person skilled in the art.
  • the two barrels 10a-10b are kinematically connected by their toothing 12a-12b by means of an intermediate mobile 15. They drive the finishing gear of the movement (not shown) which, in a conventional manner, can mesh with any part of the chain formed by these three mobiles.
  • the first barrel 10a is provided with a differential 16 mounted on its shaft 13a. It comprises, from the bottom to the top, a first mobile input (hidden in the drawing by others), called ratchet, rotated, in a conventional manner, when winding the springs, a second mobile input 17 rotated during their disarming, as will appear later, and an output mobile 18.
  • a first mobile input hidden in the drawing by others
  • ratchet rotated, in a conventional manner, when winding the springs
  • a second mobile input 17 rotated during their disarming, as will appear later
  • an output mobile 18 an output mobile 18.
  • the mobile 18 of the differential meshes with a wheel 19 frictionally mounted on its axis and whose pinion 20 is engaged with a counting wheel 21. It comprises a lower plate 22 provided with teeth all around its periphery and meshing with the pinion 20, and an upper board 23 with a similar toothing, but only on a sector of 180 °.
  • the gear ratio between the first barrel 10a and the counting wheel 21 is determined so that this wheel performs a revolution in a time equal to the walking capacity of the movement.
  • the upper board 23 meshes with a wheel 24 frictionally mounted on its axis and whose pinion 25 is disposed beneath it, in the plane of the lower board 22 of the counting wheel 21.
  • This pinion 25 drives, via a reference 26, a first display mobile 27 which will be described later in detail.
  • the first set of display will be called the assembly constituted by the friction wheel 24, the pinion 25, the reference 26 and the mobile 27.
  • the upper board 23 also meshes with an intermediate wheel 28, the pinion 29 of which is disposed beneath it in the plane of the lower board 22, meshes with a second display unit 30.
  • the second set of displays will be called the assembly constituted by the wheel 28, the pinion 29 and the second display mobile 30.
  • the display mobiles 27 and 30 each consist of a wheel 31a-31b respectively engaged with the return 26 and the pinion 29 of the first and second display trains.
  • Each mobile 27 and 30 carries an indicator needle 32a-32b moving between a first and a second extreme positions.
  • the wheels 31a-31b are pierced with circular openings 33a-33b delimited by arms 34a-34b.
  • Pins 35 integral with the plate or a bridge of the movement take place in these openings and serve as stops on one side and the other of the opening, stopping the stroke of the needles in their extreme positions.
  • the gear ratio of the first and second display trains is determined in such a way that the needles go from a first to a second extreme position when the counting wheel 21 is rotated 180 ° by driving, respectively, the wheel 24. and the wheel 28.
  • Each display unit 27 and 30 is further provided with a return spring 36a-36b, for example a spiral spring fixed on one side to one of the pins 35 and, on the other hand, to the wheel 31a. 31b.
  • a return spring 36a-36b for example a spiral spring fixed on one side to one of the pins 35 and, on the other hand, to the wheel 31a. 31b.
  • the first display mobile 27 cooperates with a first angular dial 37 in which the needle 32a moves to indicate, in its first and second extreme positions, the 0 and 50% of the power reserve. At rest, the needle indicates 50%.
  • the second mobile display 30 cooperates, meanwhile, with a second angular dial 38 in which the needle 32b moves to indicate, in its first and second extreme positions, the 50 and 100% of the power reserve. At rest, the needle indicates 50%.
  • the intermediate mobile 15 is provided with a pinion gear 39 connected kinematically to the second mobile input 17 of the differential by two referrals 40 and 41.
  • the mobile 15 being driven by the two barrels 10a-10b, the mobile 17 is well trained in rotation when disarming springs.
  • the mechanism is adjusted so that the counting wheel 21 is engaged, at the end of the toothed sector of the board 23, with the second display train 28-29-30.
  • the indicator needle 32b indicates 100% on the dial 38, thus maintained by meshing with the wheel 21.
  • the first display train is not in engagement with the counting wheel 21.
  • the indicator needle 32a is held in its rest position by the spring 36a and indicates 50% on the dial 37. This situation is illustrated on the figure 3a .
  • the two barrels 10a and 10b disarm jointly, driving the finishing gear of the movement and the mobile output 18 of the differential 16 in a first direction.
  • the counting wheel 21 rotates, meshing with the board 22.
  • the board 23 then actuates the second display train 28-29-30, which moves the pointer 32b in the dial 38 and relaxes the spring 36b.
  • the first display train 24-25-26-27 remains stationary and the needle 32a is fixed at the 50% position, held by the spring 36a.
  • needle 32b changes in its dial 38. Then, when the counting wheel 21 has rotated 180 °, that is to say that the amount of energy stored has halved, needle 32b indicates 50% ( figure 3b ).
  • the board 23 leaves the contact of the second display train, the spring now the needle 32b to the 50% position.
  • the board 23 then drives the first display train and rotates the mobile 27, compressing the spring 36a.
  • the indicator needle 32a moves on its dial indicating from 50 to 0%.
  • the wearer of the watch must then manually raise the barrels 10a and 10b by a traditional winding and well known to those skilled in the art. During this operation, the ratchet rotates and drives the output mobile 18 in its second direction.
  • the counting wheel 21 thus turns, too, in the opposite direction to what has been described above. It rotates, by the toothed sector of its board 23, first the first display train.
  • the needle 32a returns to its initial position 50% and is held by the spring 36a when the wheel 24 is no longer engaged with the board 23. Then, it meshes with the wheel 28 and returns the needle 32b to its original position ( figure 3a ), keeping it in place by this meshing.
  • the friction wheels 19 and 24 present in the mechanism are there to avoid this problem, which could occur in case of slight maladjustment.
  • the carrier raises the barrels 10a-10b, if the needle 32a has reached the extreme position in which it indicates 50% and that the board 23 is still engaged with the wheel 24, then, the mobile 27 being in abutment the wheel 24 pivots frictionally on its axis, while the counting wheel 21 continues its rotation.
  • the carrier can continue reassembly, the counting wheel 21 then driving the second display train.
  • the carrier continues to raise the barrels while the needle 32b has reached the extreme position in which it indicates 100%, then, the mobile 30 being in abutment, it is the wheel 19 which pivots friction on its axis.
  • the wearer can continue reassembly, without the counting wheel becoming disfigured from the display.
  • the friction of the wheel 19 must be harder than that of the wheel 24, so that, when the first display mobile 27 is in abutment, the friction does not occur upstream of the counting wheel 21, which would prevent to train the second train of display.
  • the needle 32b indicates 50% and the needle 32a approaches 0. If, when it reaches this value and the wheel 31a is abutting on one of the pins 35a, the barrels continue to rotate, the wheel 19 rotates friction to allow the movement to operate for some time, without discomposing the display trains and the counting wheel 21.
  • the invention can be directly applied to a movement having only one cylinder, but which one would like to display the power reserve in two dials.
  • the meshing of the counting wheel with one or the other of the display trains may, particularly in the case of a movement with a cylinder, be associated with any power reserve fraction. For example, if the chronometric conditions are satisfied when the power reserve is greater than 10%, then the hand of the first dial indicates the amount of energy between 100 and 10%, while that of the second dial indicates the remaining amount.
  • the skilled person can change the importance of the toothed sector of the board 23 by adjusting the relative position of the meshing points of the display trains with this board. If the movement does not move the display trains, another solution is to add to the wheel 22, an additional board which, like the board 23, is partially toothed. Each partially toothed board meshes with one of the display trains. Their drive is adjusted by the relative positioning of the toothed sectors of these boards.
  • gear ratios of the display trains are adapted accordingly for the needle to scan the entire dial for the duration of its movement.
  • the indicator hands can be held in their rest position by various spring systems other than a spiral spring
  • the display can be done by means other than a needle
  • the counting function could, in particular, be obtained with a cam system and probe.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Distances Traversed On The Ground (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)

Abstract

The mechanism has a differential gear (16) with an output ratchet (18) driven in two directions during winding and unwinding of a mainspring. Two display units are coupled to the ratchet and are terminated by needles (32a, 32b). Each display unit is moved successively by a counting wheel (21), which is driven by the ratchet, to respectively indicate lower and upper fractions of a power reserve of the mainspring. One of the display units is constituted by a friction wheel (24), a pinion (25), a setting wheel (26) and a rotating display unit (27), and the other display unit is constituted by an intermediate wheel (28), a pinion (29) and a rotating display unit (30).

Description

La présente invention se rapporte au domaine da l'horlogerie mécanique. Elle concerne, plus particulièrement, un mécanisme indicateur de réserve de marche d'un mouvement de montre mécanique, c'est-à-dire un mécanisme destiné à fournir une information sur la quantité d'énergie mécanique stockée dans le ressort-moteur contenu dans son barillet
CH 685 963 montre une pièce d'horlogerie qui est mue par une source d'énergie élevée constituée par deux barillets en série. Pour permettra d'indiquer la réserve de marche chaque barillet est équipé d'un différentiel dont l'un des mobiles d'entrée est couplé à l' arbre du barillet respectif et dont l' autre mobile d'entrée est connecté au mobile d'entrée correspondant de l'autre barillet. Les deux mobiles d'entrée sont couplés ensemble à la denture extérieure du barillet qui est en prise avec la roue d'entrée du train de finissage de la pièce.The present invention relates to the field of mechanical watchmaking. It relates, more particularly, to a power reserve indicator mechanism of a mechanical watch movement, that is to say a mechanism for providing information on the amount of mechanical energy stored in the mainspring contained in his barrel
CH 685 963 shows a timepiece that is driven by a high energy source consisting of two barrels in series. To indicate the power reserve each barrel is equipped with a differential which one of the input mobile is coupled to the respective barrel shaft and the other mobile input is connected to the mobile of corresponding entry of the other barrel. The two input mobiles are coupled together to the outer toothing of the cylinder which is engaged with the input wheel of the finishing train of the part.

De manière classique, un tel mécanisme comporte un indicateur de réserve de marche et un engrenage différentiel avec un premier mobile d'entrée (rochet) entraîné en rotation lors de l'ermage du ressort, un deuxième mobile d'entrée entraîné en rotation lors du désarmage du ressort et un mobile de sortie relié à l' indicateur de réserve de marche, l' entraînant dans un premier sens au cours de l'armage et dans un deuxième sens lors du désarmage. L'indicateur est susceptible de parcourir un angle donné compris entre deux positions extrêmes dont la première est occupée lorsque le ressort est complètement armé et la seconde lorsqu'il est complètement désarmé.Conventionally, such a mechanism comprises a power reserve indicator and a differential gear with a first input movable (ratchet) rotated during the clamping of the spring, a second input movable rotated during the disarming of the spring and an output mobile connected to the power reserve indicator, driving it in a first direction during winding and in a second direction during disarming. The indicator is likely to traverse a given angle between two extreme positions, the first of which is occupied when the spring is fully armed and the second when it is completely disarmed.

Certains mouvements d'horlogerie comportent deux barillets entraînant ensemble le rouage de finissage. Leurs deux ressorts agissent toujours de manière simultanée. Il est connu de donner une indication de la réserve de marche d'un tel mouvement par un affichage double. Comme illustré par les figures 1a, 1b et 1c, deux aiguilles 1 et 2 disposées respectivement dans des cadrans 3 et 4, évoluent conjointement, au fur et à mesure que les ressorts se déchargent, d'une position 100% (figure 1a) lorsqu'ils sont complètement armés à une position 0% (figure 1c) lorsqu'ils sont désarmés, en passant par une position intermédiaire 50% (figure 1b).Some watch movements have two barrels together driving the finishing gear. Their two springs always act simultaneously. It is known to give an indication of the power reserve of such a movement by a dual display. As illustrated by Figures 1a, 1b and 1c , two needles 1 and 2 arranged respectively in the dials 3 and 4, evolve jointly, as the springs discharge, from a position 100% ( figure 1a ) when fully armed at a 0% position ( figure 1c ) when disarmed, passing through an intermediate position 50% ( figure 1b ).

Or, l'affichage ainsi procuré ne traduit pas de manière suffisamment claire la diminution de la quantité d'énergie stockée. L'effet visuel est, en effet, sensiblement le même que si le mouvement comportait un seul ressort de grande capacité dont l'indicateur de réserve de marche serait partagé en deux affichages synchrones.However, the display thus procured does not translate sufficiently clearly the decrease in the amount of energy stored. The visual effect is, in fact, substantially the same as if the movement had a single large capacity spring whose power reserve indicator would be divided into two synchronous displays.

Une problématique semblable se retrouve dans le cas d'un mouvement à un seul barillet, par exemple, lorsque la réserve de marche doit être supérieure à une valeur limite pour assurer une mesure chronométrique satisfaisante. Généralement la quantité d'énergie stockée est indiquée à l'aide d'un affichage unique, muni d'un repère qui marque cette valeur limite. Or, il pourrait être particulièrement intéressant pour l'utilisateur d'avoir un affichage double afin de représenter, respectivement, l'évolution de la réserve de marche au-delà et en-deçà de la valeur limite.A similar problem is found in the case of a movement with a single barrel, for example, when the power reserve must be greater than a limit value to ensure a satisfactory chronometric measurement. Generally the amount of stored energy is indicated using a single display, provided with a mark that marks this limit value. However, it could be particularly interesting for the user to have a dual display to represent, respectively, the evolution of the power reserve beyond and below the limit value.

La présente invention a pour but de proposer un mécanisme indicateur de réserve de marche permettant d'afficher une information sur la quantité d'énergie stockée dans le ressort-moteur du mouvement au moyen de plusieurs indicateurs indépendants.The present invention aims to provide a power reserve indicator mechanism for displaying information on the amount of energy stored in the movement of the mainspring by means of several independent indicators.

De façon plus précise, l'invention concerne un mécanisme destiné à indiquer la réserve de marche d'un ressort logé dans au moins un premier barillet comprenant:

  • un différentiel doté:
    • d'un premier mobile d'entrée entraîné en rotation lors de l'armage du ressort,
    • d'un deuxième mobile d'entrée entraîné en rotation lors du désarmage du ressort, et
    • d'un mobile de sortie entraîné dans un premier sens au cours de l'armage du ressort et dans un deuxième sens lors de son désarmage, et
  • au moins un premier et un deuxième trains d'affichage couplés au mobile de sortie et se terminant par un indicateur.
More specifically, the invention relates to a mechanism for indicating the power reserve of a spring housed in at least a first barrel comprising:
  • a differential equipped with:
    • a first input mobile driven in rotation during winding of the spring,
    • a second input movable rotated during the disarming of the spring, and
    • an output mobile driven in a first direction during the winding of the spring and in a second direction during its disarming, and
  • at least a first and a second display train coupled to the output mobile and ending with an indicator.

Selon l'invention, le mécanisme comporte, en outre, un organe de comptage entraîné par le mobile de sortie du différentiel, chaque train d'affichage étant mû successivement par l'organe de comptage pour indiquer respectivement des fractions inférieure et supérieure complémentaires de la réserve de marche du ressort.According to the invention, the mechanism further comprises a counting member driven by the differential output mobile, each display train being moved successively by the counting member to respectively indicate complementary lower and upper fractions of the spring power reserve.

L'organe de comptage comprend une roue accomplissant une révolution en une durée sensiblement égale à la capacité de marche procurée par le ressort.The counting member comprises a wheel performing a revolution in a period substantially equal to the walking capacity provided by the spring.

Cette roue comporte avantageusement:

  • une première planche pourvue d'une denture sur toute sa périphérie et entraînée par le mobile de sortie du différentiel, et
  • une deuxième planche pourvue d'une denture sur une portion de sa périphérie et entraînant au moins l'un des trains d'affichage.
This wheel advantageously comprises:
  • a first board provided with a toothing on its entire periphery and driven by the differential output mobile, and
  • a second board provided with teeth on a portion of its periphery and driving at least one of the display trains.

Le mécanisme comporte encore l'une ou l'autre des caractéristiques suivantes:

  • les indicateurs évoluent entre deux positions extrêmes et les rapports d'engrenage des trains d'affichage sont tels que l'organe de comptage entraîne ces indicateurs d'une position extrême à l'autre;
  • les positions extrêmes des indicateurs sont définies par des butées.
  • il comporte au moins un mobile monté à friction sur son axe et permettant au barillet de tourner lorsque les indicateurs sont en butée.
The mechanism further includes one or more of the following features:
  • the indicators move between two extreme positions and the gear ratios of the display trains are such that the counting device causes these indicators from one extreme position to the other;
  • the extreme positions of the indicators are defined by stops.
  • it comprises at least one mobile mounted friction on its axis and allowing the barrel to turn when the indicators are in abutment.

Dans une application particulièrement intéressante de l'invention, le premier barillet est couplé cinématiquement à un deuxième barillet.In a particularly advantageous application of the invention, the first cylinder is kinematically coupled to a second cylinder.

Dans ce dernier cas, la deuxième planche de la roue de l'organe de comptage peut être dentée sur la moitié de sa périphérie et les points d'engrènement de cette planche avec les trains d'affichage sont diamétralement opposés.In the latter case, the second board of the wheel of the counting member may be toothed on half of its periphery and the points of engagement of this board with the display trains are diametrically opposed.

Les premier et deuxième trains d'affichage sont respectivement agencés pour indiquer lorsque la réserve de marche est comprise entre 0 et 50% et entre 50 et 100% de la capacité de marche.The first and second display trains are respectively arranged to indicate when the power reserve is between 0 and 50% and between 50 and 100% of the walking capacity.

D'autres détails apparaîtront plus clairement à la lecture de la description qui suit, faite en référence au dessin annexé, dans lequel :

  • la figure 2 est une vue simplifiée du mécanisme selon l'invention, et
  • la figure 3 représente l'évolution de ses deux indicateurs de réserve de marche.
Other details will appear more clearly on reading the description which follows, made with reference to the appended drawing, in which:
  • the figure 2 is a simplified view of the mechanism according to the invention, and
  • the figure 3 represents the evolution of its two power reserve indicators.

La figure 2 illustre un exemple de mise en oeuvre de l'invention appliqué à un mouvement doté de premier et deuxième barillets 10a et 10b. Dans un souci de simplification, la platine et les ponts entre lesquels pivotent les différents mobiles n'ont pas été représentés car cela relève des connaissances normales de l'homme de métier.The figure 2 illustrates an exemplary implementation of the invention applied to a movement with first and second barrels 10a and 10b. For the sake of simplicity, the plate and the bridges between which the various mobiles are pivoted have not been represented since this is a normal knowledge of the person skilled in the art.

Les barillets 10a-10b comportent chacun respectivement :

  • un tambour 11a-11b qui sert de logement à un ressort-moteur et qui est muni d'une denture 12a-12b,
  • un arbre 13a-13b de pivotement, et
  • un couvercle 14a-14b qui ferme le tambour 11a-11b.
The barrels 10a-10b each comprise respectively:
  • a drum 11a-11b which serves as a housing for a mainspring and which is provided with a toothing 12a-12b,
  • a pivot shaft 13a-13b, and
  • a cover 14a-14b which closes the drum 11a-11b.

Les deux barillets 10a-10b sont reliés cinématiquement par leur denture 12a-12b au moyen d'un mobile intermédiaire 15. Ils entraînent le rouage de finissage du mouvement (non représenté) qui, de manière classique, peut engrener à un endroit quelconque de la chaîne formée par ces trois mobiles.The two barrels 10a-10b are kinematically connected by their toothing 12a-12b by means of an intermediate mobile 15. They drive the finishing gear of the movement (not shown) which, in a conventional manner, can mesh with any part of the chain formed by these three mobiles.

Le premier barillet 10a est doté d'un différentiel 16 monté sur son arbre 13a. Il comporte, du bas vers le haut, un premier mobile d'entrée (caché au dessin par les autres), appelé rochet, entraîné en rotation, de manière classique, lors de l'armage des ressorts, un deuxième mobile d'entrée 17 entraîné en rotation lors de leur désarmage, ainsi qu'il apparaîtra plus loin, et un mobile de sortie 18.The first barrel 10a is provided with a differential 16 mounted on its shaft 13a. It comprises, from the bottom to the top, a first mobile input (hidden in the drawing by others), called ratchet, rotated, in a conventional manner, when winding the springs, a second mobile input 17 rotated during their disarming, as will appear later, and an output mobile 18.

Le mobile 18 du différentiel engrène avec une roue 19 montée à friction sur son axe et dont le pignon 20 est en prise avec une roue de comptage 21. Celle-ci comporte une planche inférieure 22 pourvue de dents sur toute sa périphérie et engrenant avec le pignon 20, et une planche supérieure 23 dotée d'une denture semblable, mais seulement sur un secteur de 180°. Le rapport d'engrenage entre le premier barillet 10a et la roue de comptage 21 est déterminé de manière à ce que cette roue effectue une révolution en une durée égale à la capacité de marche du mouvement.The mobile 18 of the differential meshes with a wheel 19 frictionally mounted on its axis and whose pinion 20 is engaged with a counting wheel 21. It comprises a lower plate 22 provided with teeth all around its periphery and meshing with the pinion 20, and an upper board 23 with a similar toothing, but only on a sector of 180 °. The gear ratio between the first barrel 10a and the counting wheel 21 is determined so that this wheel performs a revolution in a time equal to the walking capacity of the movement.

La planche supérieure 23 engrène avec une roue 24 montée à friction sur son axe et dont le pignon 25 est disposé sous elle, dans le plan de la planche inférieure 22 de la roue de comptage 21. Ce pignon 25 entraîne, par l'intermédiaire d'un renvoi 26, un premier mobile d'affichage 27 qui sera décrit plus loin en détail. Par commodité, on appellera premier train d'affichage l'ensemble constitué par la roue à friction 24, le pignon 25, le renvoi 26 et le mobile 27.The upper board 23 meshes with a wheel 24 frictionally mounted on its axis and whose pinion 25 is disposed beneath it, in the plane of the lower board 22 of the counting wheel 21. This pinion 25 drives, via a reference 26, a first display mobile 27 which will be described later in detail. For convenience, the first set of display will be called the assembly constituted by the friction wheel 24, the pinion 25, the reference 26 and the mobile 27.

La planche supérieure 23 engrène aussi avec une roue intermédiaire 28 dont le pignon 29, disposé sous elle dans le plan de la planche inférieure 22, engrène avec un deuxième mobile d'affichage 30. On appellera deuxième train d'affichage l'ensemble constitué par la roue 28, le pignon 29 et le deuxième mobile d'affichage 30.The upper board 23 also meshes with an intermediate wheel 28, the pinion 29 of which is disposed beneath it in the plane of the lower board 22, meshes with a second display unit 30. The second set of displays will be called the assembly constituted by the wheel 28, the pinion 29 and the second display mobile 30.

On notera que les points d'engrènement de la roue de comptage 21 avec les premier et deuxième trains d'affichage, c'est-à-dire, respectivement, avec la roue à friction 24 et la roue intermédiaire 28, sont diamétralement opposés.It will be noted that the meshing points of the counting wheel 21 with the first and second display trains, that is to say, respectively, with the friction wheel 24 and the intermediate wheel 28, are diametrically opposed.

Les mobiles d'affichage 27 et 30 sont chacun constitués d'une roue 31 a-31 b, respectivement en prise avec le renvoi 26 et le pignon 29 des premier et deuxième trains d'affichage. Chaque mobile 27 et 30 porte une aiguille indicatrice 32a-32b évoluant entre une première et une deuxième positions extrêmes.The display mobiles 27 and 30 each consist of a wheel 31a-31b respectively engaged with the return 26 and the pinion 29 of the first and second display trains. Each mobile 27 and 30 carries an indicator needle 32a-32b moving between a first and a second extreme positions.

Pour définir avec précision ces positions extrêmes, les roues 31a-31b sont percées d'ouvertures circulaires 33a-33b délimitées par des bras 34a-34b. Des goupilles 35 solidaires de la platine ou d'un pont du mouvement prennent place dans ces ouvertures et servent de butées, d'un côté et de l'autre de l'ouverture, arrêtant la course des aiguilles dans leurs positions extrêmes.To define precisely these extreme positions, the wheels 31a-31b are pierced with circular openings 33a-33b delimited by arms 34a-34b. Pins 35 integral with the plate or a bridge of the movement take place in these openings and serve as stops on one side and the other of the opening, stopping the stroke of the needles in their extreme positions.

Le rapport d'engrenage des premier et deuxième trains d'affichage est déterminé de manière à ce que les aiguilles passent d'une première à une deuxième positions extrêmes lorsque la roue de comptage 21 pivote de 180° en entraînant, respectivement, la roue 24 et la roue 28.The gear ratio of the first and second display trains is determined in such a way that the needles go from a first to a second extreme position when the counting wheel 21 is rotated 180 ° by driving, respectively, the wheel 24. and the wheel 28.

Chaque mobile d'affichage 27 et 30 est encore doté d'un ressort de rappel 36a-36b, par exemple un ressort spiral fixé, d'un côté, sur une des goupilles 35 et, de l'autre, à la roue 31a-31b. Ainsi, les aiguilles indicatrices 32a-32b sont maintenues dans leur position de repos, ainsi qu'il sera expliqué ci-après.Each display unit 27 and 30 is further provided with a return spring 36a-36b, for example a spiral spring fixed on one side to one of the pins 35 and, on the other hand, to the wheel 31a. 31b. Thus, the indicator hands 32a-32b are held in their rest position, as will be explained below.

Comme on peut le voir sur la figure 3, le premier mobile d'affichage 27 coopère avec un premier cadran angulaire 37 dans lequel se déplace l'aiguille 32a pour indiquer, dans ses première et deuxième positions extrêmes, le 0 et le 50% de la réserve de marche. Au repos, l'aiguille indique 50%.As can be seen on the figure 3 , the first display mobile 27 cooperates with a first angular dial 37 in which the needle 32a moves to indicate, in its first and second extreme positions, the 0 and 50% of the power reserve. At rest, the needle indicates 50%.

Le deuxième mobile d'affichage 30 coopère, quant à lui, avec un deuxième cadran angulaire 38 dans lequel se déplace l'aiguille 32b pour indiquer, dans ses première et deuxième positions extrêmes, le 50 et le 100% de la réserve de marche. Au repos, l'aiguille indique 50%.The second mobile display 30 cooperates, meanwhile, with a second angular dial 38 in which the needle 32b moves to indicate, in its first and second extreme positions, the 50 and 100% of the power reserve. At rest, the needle indicates 50%.

Le mobile intermédiaire 15 est doté d'un pignon 39 relié cinématiquement au deuxième mobile d'entrée 17 du différentiel par deux renvois 40 et 41. Le mobile 15 étant entraîné par les deux barillets 10a-10b, le mobile 17 se trouve bien entraîné en rotation lors du désarmage des ressorts.The intermediate mobile 15 is provided with a pinion gear 39 connected kinematically to the second mobile input 17 of the differential by two referrals 40 and 41. The mobile 15 being driven by the two barrels 10a-10b, the mobile 17 is well trained in rotation when disarming springs.

En fonctionnement, lorsque les deux barillets 10a et 10b sont complètement chargés, le mécanisme est réglé de manière à ce que la roue de comptage 21 soit en prise, à la fin du secteur denté de la planche 23, avec le deuxième train d'affichage 28-29-30. L'aiguille indicatrice 32b indique 100% sur le cadran 38, ainsi maintenue par son engrènement avec la roue 21. Le premier train d'affichage n'est pas en prise avec la roue de comptage 21. De son côté, l'aiguille indicatrice 32a est maintenue dans sa position de repos par le ressort 36a et indique 50% sur le cadran 37. Cette situation est illustrée sur la figure 3a.In operation, when the two barrels 10a and 10b are fully loaded, the mechanism is adjusted so that the counting wheel 21 is engaged, at the end of the toothed sector of the board 23, with the second display train 28-29-30. The indicator needle 32b indicates 100% on the dial 38, thus maintained by meshing with the wheel 21. The first display train is not in engagement with the counting wheel 21. On its side, the indicator needle 32a is held in its rest position by the spring 36a and indicates 50% on the dial 37. This situation is illustrated on the figure 3a .

Puis, les deux barillets 10a et 10b se désarment conjointement, en entraînant le rouage de finissage du mouvement et le mobile de sortie 18 du différentiel 16 dans un premier sens. Ainsi, la roue de comptage 21 tourne, par engrènement avec la planche 22. La planche 23 actionne alors le deuxième train d'affichage 28-29-30, ce qui déplace l'aguille indicatrice 32b dans le cadran 38 et détend le ressort 36b. Le premier train d'affichage 24-25-26-27 reste immobile et l'aiguille 32a est fixe sur la position 50%, maintenue par le ressort 36a.Then, the two barrels 10a and 10b disarm jointly, driving the finishing gear of the movement and the mobile output 18 of the differential 16 in a first direction. Thus, the counting wheel 21 rotates, meshing with the board 22. The board 23 then actuates the second display train 28-29-30, which moves the pointer 32b in the dial 38 and relaxes the spring 36b. The first display train 24-25-26-27 remains stationary and the needle 32a is fixed at the 50% position, held by the spring 36a.

Les barillets continuent de se décharger et l'aiguille 32b évolue dans son cadran 38. Puis, quand la roue de comptage 21 a pivoté de 180°, c'est-à-dire que la quantité d'énergie stockée a diminué de moitié, l'aiguille 32b indique 50% (figure 3b). La planche 23 quitte le contact du deuxième train d'affichage, le ressort maintenant l'aiguille 32b sur la position 50%. La planche 23 entraîne alors le premier train d'affichage et fait pivoter le mobile 27, en compressant le ressort 36a. L'aiguille indicatrice 32a se déplace sur son cadran en indiquant de 50 à 0%.The barrels continue to discharge and the needle 32b changes in its dial 38. Then, when the counting wheel 21 has rotated 180 °, that is to say that the amount of energy stored has halved, needle 32b indicates 50% ( figure 3b ). The board 23 leaves the contact of the second display train, the spring now the needle 32b to the 50% position. The board 23 then drives the first display train and rotates the mobile 27, compressing the spring 36a. The indicator needle 32a moves on its dial indicating from 50 to 0%.

Lorsque les deux barillets sont vides, l'aiguille du deuxième train indique 50% et celle du premier 0 (figure 3c).When both barrels are empty, the needle of the second train indicates 50% and that of the first 0 ( figure 3c ).

Le porteur de la montre doit alors remonter manuellement les barillets 10a et 10b par un remontoir traditionnel et bien connu de l'homme du métier. Pendant cette opération, le rochet tourne et entraîne le mobile de sortie 18 dans son deuxième sens.The wearer of the watch must then manually raise the barrels 10a and 10b by a traditional winding and well known to those skilled in the art. During this operation, the ratchet rotates and drives the output mobile 18 in its second direction.

La roue de comptage 21 tourne donc, elle aussi, dans le sens inverse de ce qui a été décrit ci-dessus. Elle fait tourner, par le secteur denté de sa planche 23, d'abord le premier train d'affichage. L'aiguille 32a revient à sa position initiale 50% et y est maintenue par le ressort 36a lorsque la roue 24 n'est plus en prise avec la planche 23. Puis, celle-ci engrène avec la roue 28 et fait revenir l'aiguille 32b à sa position initiale (figure 3a), la maintenant en place par cet engrènement.The counting wheel 21 thus turns, too, in the opposite direction to what has been described above. It rotates, by the toothed sector of its board 23, first the first display train. The needle 32a returns to its initial position 50% and is held by the spring 36a when the wheel 24 is no longer engaged with the board 23. Then, it meshes with the wheel 28 and returns the needle 32b to its original position ( figure 3a ), keeping it in place by this meshing.

Il est primordial, tant lors de l'armage que du désarmage des barillets 10a-10b, d'éviter que le réglage initial soit modifié et que les indicateurs ne soient plus appairés avec le secteur denté de la roue de comptage 21. Autrement dit, il faut que, lorsque le point d'engrenage de la planche 23 se situe au niveau de l'une des extrémités de son secteur denté, l'aiguille indicatrice du train d'affichage avec lequel elle est en prise occupe l'une de ses positions extrêmes.It is essential, both during the arming and the disarming of the barrels 10a-10b, to avoid that the initial setting is changed and that the indicators are no longer matched with the toothed sector of the counting wheel 21. In other words, it is necessary that, when the gear point of the board 23 is at one of the ends of its toothed sector, the indicator needle of the train display in which it is engaged occupies one of its extreme positions.

Les roues à friction 19 et 24 présentes dans le mécanisme sont là pour éviter ce problème, qui pourrait survenir en cas de léger déréglage. Ainsi, lorsque le porteur remonte les barillets 10a-10b, si l'aiguille 32a a atteint la position extrême dans laquelle elle indique 50% et que la planche 23 est toujours en prise avec la roue 24, alors, le mobile 27 étant en butée, la roue 24 pivote à friction sur son axe, tandis que la roue de comptage 21 continue sa rotation. Le porteur peut poursuivre le remontage, la roue de comptage 21 entraînant ensuite le deuxième train d'affichage.The friction wheels 19 and 24 present in the mechanism are there to avoid this problem, which could occur in case of slight maladjustment. Thus, when the carrier raises the barrels 10a-10b, if the needle 32a has reached the extreme position in which it indicates 50% and that the board 23 is still engaged with the wheel 24, then, the mobile 27 being in abutment the wheel 24 pivots frictionally on its axis, while the counting wheel 21 continues its rotation. The carrier can continue reassembly, the counting wheel 21 then driving the second display train.

A nouveau, si le porteur continue à remonter les barillets alors que l'aiguille 32b a atteint la position extrême dans laquelle elle indique 100%, alors, le mobile 30 étant en butée, c'est la roue 19 qui pivote à friction sur son axe. Le porteur peut poursuivre le remontage, sans que la roue de comptage se désapparie de l'affichage.Again, if the carrier continues to raise the barrels while the needle 32b has reached the extreme position in which it indicates 100%, then, the mobile 30 being in abutment, it is the wheel 19 which pivots friction on its axis. The wearer can continue reassembly, without the counting wheel becoming disfigured from the display.

La friction de la roue 19 doit être plus dure que celle de la roue 24, de manière à ce que, lorsque le premier mobile d'affichage 27 est en butée, la friction ne se fasse pas en amont de la roue de comptage 21, ce qui empêcherait d'entraîner le deuxième train d'affichage.The friction of the wheel 19 must be harder than that of the wheel 24, so that, when the first display mobile 27 is in abutment, the friction does not occur upstream of the counting wheel 21, which would prevent to train the second train of display.

De même, vers la fin du dévidement des barillets, l'aiguille 32b indique 50% et l'aiguille 32a se rapproche de 0. Si, lorsqu'elle a atteint cette valeur et que la roue 31 a est en butée sur une des goupilles 35a, les barillets continuent à tourner, la roue 19 tourne à friction pour permettre au mouvement de fonctionner encore quelques temps, sans désappairer les trains d'affichage et la roue de comptage 21.Likewise, toward the end of the unwinding of the barrels, the needle 32b indicates 50% and the needle 32a approaches 0. If, when it reaches this value and the wheel 31a is abutting on one of the pins 35a, the barrels continue to rotate, the wheel 19 rotates friction to allow the movement to operate for some time, without discomposing the display trains and the counting wheel 21.

Ainsi est proposé un mécanisme d'affichage de la réserve d'un mouvement à deux barillets, permettant de représenter de manière séparée la réserve de marche de chacun des barillets.Thus is proposed a mechanism for displaying the reserve of a two-barrel movement, making it possible to separately represent the power reserve of each of the barrels.

Comme annoncé dans l'introduction, l'invention peut être directement appliquée à un mouvement ne comportant qu'un barillet, mais dont on voudrait afficher la réserve de marche dans deux cadrans.As announced in the introduction, the invention can be directly applied to a movement having only one cylinder, but which one would like to display the power reserve in two dials.

L'engrènement de la roue de comptage avec l'un ou l'autre des trains d'affichage peut, particulièrement dans le cas d'un mouvement à un barillet, être associé avec n'importe quelle fraction de réserve de marche. Par exemple, si les conditions chronométriques sont satisfaites quand la réserve de marche est supérieure à 10%, alors l'aiguille du premier cadran indique la quantité d'énergie comprise entre 100 et 10%, tandis que celle du deuxième indique la tranche restante.The meshing of the counting wheel with one or the other of the display trains may, particularly in the case of a movement with a cylinder, be associated with any power reserve fraction. For example, if the chronometric conditions are satisfied when the power reserve is greater than 10%, then the hand of the first dial indicates the amount of energy between 100 and 10%, while that of the second dial indicates the remaining amount.

Pour ce faire, l'homme du métier peut modifier l'importance du secteur denté de la planche 23 en ajustant la position relative des points d'engrènement des trains d'affichage avec cette planche. Si le mouvement ne permet pas de déplacer les trains d'affichage, une autre solution consiste à ajouter, à la roue 22, une planche supplémentaire qui, comme la planche 23, est partiellement dentée. Chaque planche partiellement dentée engrène avec l'un des trains d'affichage. Leur entraînement est ajusté par le positionnement relatif des secteurs dentés de ces planches.To do this, the skilled person can change the importance of the toothed sector of the board 23 by adjusting the relative position of the meshing points of the display trains with this board. If the movement does not move the display trains, another solution is to add to the wheel 22, an additional board which, like the board 23, is partially toothed. Each partially toothed board meshes with one of the display trains. Their drive is adjusted by the relative positioning of the toothed sectors of these boards.

Bien entendu, les rapports d'engrenages des trains d'affichages sont adaptés en conséquence pour que l'aiguille balaye la totalité du cadran pendant la durée de son déplacement.Of course, the gear ratios of the display trains are adapted accordingly for the needle to scan the entire dial for the duration of its movement.

La description ci-dessus n'a été donnée qu'à titre d'exemple et ne limite pas l'invention. L'homme du métier pourrait très facilement remplacer certains éléments décrits par d'autres assurant la même fonction. Par exemple, les aiguilles indicatrices peuvent être maintenues dans leur position de repos par divers systèmes ressorts autres qu'un ressort spiral, l'affichage peut se faire par un autre moyen qu'une aiguille et la fonction de comptage pourrait, notamment, être obtenue avec un système de came et palpeur.The above description has been given by way of example only and does not limit the invention. The person skilled in the art could very easily replace certain elements described by others performing the same function. For example, the indicator hands can be held in their rest position by various spring systems other than a spiral spring, the display can be done by means other than a needle and the counting function could, in particular, be obtained with a cam system and probe.

Claims (11)

  1. Mechanism designed to indicate the power reserve of a spring housed in at least one first barrel (10a), comprising:
    - a differential gear (16) equipped with:
    - a first input wheel driven in rotation when the spring is being armed,
    - a second input wheel (17) driven in rotation when the spring is being disarmed, and
    - an output wheel (18) driven in a first direction when the spring is being armed, and in a second direction when the spring is being disarmed,
    characterised in that it comprises
    - at least one first (24, 25, 26, 27) and one second (28, 29, 30) display gear trains coupled to said output wheel and each terminating with an indicator (32a, 32b), and further featuring a counting element driven by the output wheel (18) of the differential gear and comprising a wheel (21) which performs a revolution in a time that is substantially equal to the operating capacity provided by the spring, wherein each display gear train is moved successively by said element to indicate respectively complementary lower and greater fractions of the power reserve of the spring.
  2. Mechanism according to claim 1, characterised in that said wheel (21) comprises:
    - a first plate (22) equipped with teeth around its entire periphery and driven by the output wheel (18) of the differential gear, and
    - a second plate (23) equipped with teeth around part of its periphery and driven by at least one of said display gear trains.
  3. Mechanism according to any one of claims 1 and 2, wherein the indicators (32a, 32b) move between two extreme positions, characterised in that the gear ratios of the display gear trains are such that the counting element (21) drives said indicators from one extreme position to another.
  4. Mechanism according to claim 3, characterised in that said extreme positions are defined by stops (35).
  5. Mechanism according to claim 4, characterised in that it comprises at least one wheel (19, 24) friction mounted on its staff and permitting the barrel (10a) to turn when the indicators (32a, 32b) are against their stops.
  6. Mechanism according to claim 5, characterised in that a first friction mounted wheel (19) is inserted into the kinematics chain connecting said differential (16) to said counting element (21).
  7. Mechanism according to claim 6, characterised in that the display gear train driven during said lower fraction comprises a second friction mounted wheel (24).
  8. Mechanism according to claim 7, characterised in that the friction of the first wheel is greater than that of the second wheel.
  9. Mechanism according to any one of claims 1 to 8, characterised in that said barrel (10a) is kinematically coupled to a second barrel (10b).
  10. Mechanism according to claim 9, characterised in that the second plate (23) is equipped with teeth on half of its periphery and in that the meshing points of said second plate with the display gear trains are diametrically opposite one another.
  11. Mechanism according to any one of claims 9 and 10, characterised in that the first and second display gear trains are respectively laid out so that they indicate when the power reserve is between 0 and 50% and between 50 and 100% of the operating capacity.
EP04405403A 2004-07-01 2004-07-01 Power reserve indicator for a mechanical timepiece Expired - Lifetime EP1612625B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT04405403T ATE402430T1 (en) 2004-07-01 2004-07-01 POWER RESERVE INDICATOR FOR A MECHANICAL WATCH
EP04405403A EP1612625B1 (en) 2004-07-01 2004-07-01 Power reserve indicator for a mechanical timepiece
DE602004015267T DE602004015267D1 (en) 2004-07-01 2004-07-01 Power reserve indicator for a mechanical watch
PCT/EP2005/052521 WO2006013120A1 (en) 2004-07-01 2005-06-02 Running reserve indicator for a mechanical watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04405403A EP1612625B1 (en) 2004-07-01 2004-07-01 Power reserve indicator for a mechanical timepiece

Publications (2)

Publication Number Publication Date
EP1612625A1 EP1612625A1 (en) 2006-01-04
EP1612625B1 true EP1612625B1 (en) 2008-07-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405403A Expired - Lifetime EP1612625B1 (en) 2004-07-01 2004-07-01 Power reserve indicator for a mechanical timepiece

Country Status (4)

Country Link
EP (1) EP1612625B1 (en)
AT (1) ATE402430T1 (en)
DE (1) DE602004015267D1 (en)
WO (1) WO2006013120A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4057080A1 (en) * 2021-03-09 2022-09-14 ETA SA Manufacture Horlogère Suisse Device for timepiece display on several mobiles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH711005B1 (en) * 2015-04-30 2019-02-15 Vaucher Mft Fleurier S A Timepiece comprising a power reserve indication device.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH685963B5 (en) * 1993-11-25 1996-05-31 Nouvelle L Mania S A Piece of mechanical watchmaking indication of the power reserve.
EP0851320B1 (en) * 1996-12-20 2000-08-02 Asulab S.A. Timepiece driven by mechanical means and with reserve power indicating system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4057080A1 (en) * 2021-03-09 2022-09-14 ETA SA Manufacture Horlogère Suisse Device for timepiece display on several mobiles

Also Published As

Publication number Publication date
DE602004015267D1 (en) 2008-09-04
WO2006013120A1 (en) 2006-02-09
EP1612625A1 (en) 2006-01-04
ATE402430T1 (en) 2008-08-15

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