EP0853264A2 - Chronograph watch provided with a mechanism having a reduced height - Google Patents

Chronograph watch provided with a mechanism having a reduced height Download PDF

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Publication number
EP0853264A2
EP0853264A2 EP97100334A EP97100334A EP0853264A2 EP 0853264 A2 EP0853264 A2 EP 0853264A2 EP 97100334 A EP97100334 A EP 97100334A EP 97100334 A EP97100334 A EP 97100334A EP 0853264 A2 EP0853264 A2 EP 0853264A2
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EP
European Patent Office
Prior art keywords
wheel
chronograph
reset
counter
seconds
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.)
Withdrawn
Application number
EP97100334A
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German (de)
French (fr)
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EP0853264A3 (en
Inventor
Erik Favre
Alphonse Bron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ETA SA Manufacture Horlogere Suisse
Ebauchesfabrik ETA AG
Original Assignee
Ebauchesfabrik ETA AG
Eta SA Fabriques dEbauches
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Publication date
Application filed by Ebauchesfabrik ETA AG, Eta SA Fabriques dEbauches filed Critical Ebauchesfabrik ETA AG
Priority to EP97100334A priority Critical patent/EP0853264A3/en
Publication of EP0853264A2 publication Critical patent/EP0853264A2/en
Publication of EP0853264A3 publication Critical patent/EP0853264A3/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph

Definitions

  • the present invention relates to a chronograph watch with analog display whose mechanism is arranged so that the height is reduced.
  • the present invention relates more precisely to a special arrangement of the reset mechanism reducing the thickness of the movement of chronograph.
  • the resetting of a counter is generally carried out at by means of a set of rockers and levers and a hammer acting on a reset heart, said heart generally supporting a training finger and being rotated on the same axis as that of the wheel and the needle of said counter.
  • the present invention aims to obtain an additional gain in thickness thanks to a particular arrangement of the reset core of minus a counter.
  • the invention relates to a chronograph watch with analog display including a movement and a chronograph mechanism comprising on a dial with several counters driven by a wheel clutchable on a PTO of the movement, said mechanism can be reset to zero by actuation of levers and hammers acting on each surrender heart to zero associated with the wheels of the respective counters, characterized in that at least one reset core is off-center with respect to the associated counter wheel in being pivoted on the axis of an additional wheel meshing with said counter wheel being in a 1/1 ratio with it.
  • This construction is applicable to a counter any but find the preferred application for the reset a counter in the center of the dial to display of the seconds using the hand chronograph by providing a height gain at the place where it is most useful, corresponding substantially to the thickness of the heart.
  • this additional wheel can introduce a frolic which can easily be reduced by the use of a specially adapted gear profile.
  • taking force is achieved by a wheel driven on the axis of the seconds wheel of the basic movement.
  • the chronograph watch which will be described comprises in a known manner a watch, mechanical or electronic to display on a dial, a share the current time using two hands in the center and a small second at 9 o'clock, on the other hand a time timed using a chronograph hand at center, a minute counter at 3 o'clock and a counter hours at 6 o'clock, this distribution on the dial of the small seconds, counters and their number can obviously be modified at the option of the manufacturers.
  • the watch movement represented schematically by block 1 has at its outlet at least one axis of force corresponding to the second 2 axis secured to a wheel seconds 3 engaged with an intermediate wheel 4 supported by an axis 5 pivoted between an upper plate 6 and a lower plate 7.
  • the intermediate wheel 4 is engaged with a wheel 8, in a 1/1 ratio with the wheel 3, to drive the small seconds hand by through an axis 9.
  • Axis 5 also supports a sliding pinion 11 which can engage by friction with the wheel 4 when starting the chronograph.
  • This clutch is controlled by means known by actuation of a pusher carried by the housing and acting on a set of levers and springs not represented.
  • This pinion 11 is in engagement with the wheel of chronograph 39, which is in a 1/1 ratio with the wheel 3 and which is supported by a driving shaft 13 the chronograph hand for display 40 of the second.
  • the chronograph wheel 39 has along of the shaft 13 only one other pinion 14, held by a elastic washer 15 bearing against an annular rim 16 of the shaft 13, and serving as a PTO for a intermediate wheel 17 driving the other counters 20, 30.
  • a reduction pinion 18 mounted on the axis of the intermediate wheel 17, is engaged in a hand with the minute wheel 19, on the other hand with a gear train consisting of wheels and pinions associates 25, 26 and 27, 28 causing the counter of 29 hours.
  • the delivery to zero of the minute counter hand 20 and the hour counter hand 30 is made so usual by reset hearts rotated on the same axes as the wheels 19, 29.
  • the heart of resetting the chronograph hand 41 is not supported by the shaft 13 of the chronograph wheel 39 but by the axis 38 of an additional wheel 37, engaged with said chronograph wheel 12 and having with it a 1/1 ratio.
  • This construction therefore makes it possible to obtain center of movement gain in height substantially equal to the thickness of the core 41, that is to say at a place particularly desirable to reserve a space necessary for the other cogs in the movement that drive the canons of the display of the current time.
  • This construction results from this construction according to the invention a more judicious distribution of reset hearts at the periphery, allowing in consequence of simplifying the design of levers and hammers (not shown) which will act on them, or to adapt other devices more easily such as that described in the document US 5,113,382 already cited.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Abstract

Stop-watch has seconds, minutes and hours wheel (39,19,29). The seconds wheel is driven through a friction clutch (11,4) and the drive is passed on to the minutes and hours wheels through pinions (25,26) and (27,28). The seconds,hours and minutes wheels (39,19,29) may each be reset to zero using levers and hammers acting on heart-shaped resetting cans (21,31,41). At least one of the resetting cans, in this case, the seconds reset (41) is offset from the corresponding counter wheel (39) by being mounted on the axis (38) of supplementary wheel (37) which engages with the counter wheel (39) and runs at the same speed.

Description

La présente invention concerne une montre-chronographe à affichage analogique dont le mécanisme est agencé de telle sorte que la hauteur en soit réduite.The present invention relates to a chronograph watch with analog display whose mechanism is arranged so that the height is reduced.

Dans les perfectionnements apportés aux chronographes, de nombreux dispositifs visent à réduire tant en surface qu'en épaisseur l'encombrement du mécanisme, c'est-à-dire l'espace nécessaire d'une part pour les rouages formant la chaíne cinématique, d'autre part pour les pièces mobiles permettant d'assurer les fonctions propres d'un chronographe, à savoir la mise en marche, l'arrêt et la remise à zero.In the improvements made to chronographs, many devices aim to reduce both in surface and in thickness the size of the mechanism, i.e. the space required on the one hand for the cogs forming the kinematic chain, other share for moving parts to ensure proper functions of a chronograph, namely setting on, off and reset.

La présente invention concerne plus précisément un agencement particulier du mécanisme de remise à zéro permettant de réduire l'épaisseur du mouvement de chronographe.The present invention relates more precisely to a special arrangement of the reset mechanism reducing the thickness of the movement of chronograph.

Dans les chronographes connus de l'art antérieur, la remise à zéro d'un compteur est généralement effectuée au moyen d'un jeu de bascules et leviers et d'un marteau agissant sur un coeur de remise à zéro, ledit coeur supportant généralement un doigt d'entraínement et étant pivoté sur le même axe que celui de la roue et de l'aiguille dudit compteur.In known chronographs of the prior art, the resetting of a counter is generally carried out at by means of a set of rockers and levers and a hammer acting on a reset heart, said heart generally supporting a training finger and being rotated on the same axis as that of the wheel and the needle of said counter.

Dans le document US 5 113 382, une réduction de l'encombrement global du mécanisme de remise à zéro est obtenue par une répartition plus judicieuse des leviers de commande, notamment des marteaux et des bascules, sur la totalité de la surface du mouvement grâce à des cames annulaires, les coeurs de remise à zéro ayant une configuration et un montage classiques.In document US 5 113 382, a reduction of the overall size of the reset mechanism is obtained by a more judicious distribution of the levers of control, including hammers and toggles, on the entire movement surface thanks to cams annulars, the reset hearts having a classic configuration and mounting.

Dans le document US 5 280 460, une diminution de la hauteur du mécanisme de chronographe est obtenue en donnant aux coeurs de remise à zéro une configuration particulière permettant de faire l'économie du doigt d'entraínement, lesdits coeurs étant néanmoins positionnés de façon classique sur les axes des compteurs respectifs.In US 5,280,460, a decrease in the height of the chronograph mechanism is obtained by giving the reset hearts a configuration special to save the finger of training, said hearts being nevertheless positioned conventionally on the axes of the respective counters.

Par rapport aux mécanismes connus, illustrés par les deux documents précités, la présente invention vise à obtenir un gain supplémentaire en épaisseur grâce à un agencement particulier du coeur de remise à zéro d'au moins un compteur.Compared to known mechanisms, illustrated by two aforementioned documents, the present invention aims to obtain an additional gain in thickness thanks to a particular arrangement of the reset core of minus a counter.

A cet effet, l'invention a pour objet une montre-chronographe à affichage analogique comprenant un mouvement et un mécanisme de chronographe comportant sur un cadran plusieurs compteurs entraínés par une roue embrayable sur une prise de force du mouvement, ledit mécanisme pouvant être remis à zéro par actionnement de leviers et de marteaux agissant sur chaque coeur de remise à zéro associé aux roues des compteurs respectifs, caractérisé en ce qu'au moins un coeur de remise à zéro est décentré par rapport à la roue de compteur associée en étant pivoté sur l'axe d'une roue supplémentaire engrenant avec ladite roue de compteur en étant dans un rapport 1/1 avec celle-ci.To this end, the invention relates to a chronograph watch with analog display including a movement and a chronograph mechanism comprising on a dial with several counters driven by a wheel clutchable on a PTO of the movement, said mechanism can be reset to zero by actuation of levers and hammers acting on each surrender heart to zero associated with the wheels of the respective counters, characterized in that at least one reset core is off-center with respect to the associated counter wheel in being pivoted on the axis of an additional wheel meshing with said counter wheel being in a 1/1 ratio with it.

Cette construction est applicable à un compteur quelconque, mais trouve sont application préférée pour la remise à zéro d'un compteur au centre du cadran pour l'affichage des secondes au moyen de l'aiguille de chronographe en procurant un gain en hauteur à l'endroit où cela est le plus utile, correspondant sensiblement à l'épaisseur du coeur. Dans la position de remise à zéro cette roue supplémentaire peut introduire un ébat d'engrenage qui peut facilement être réduit par l'utilisation d'un profil d'engrenage spécialement adapté.This construction is applicable to a counter any but find the preferred application for the reset a counter in the center of the dial to display of the seconds using the hand chronograph by providing a height gain at the place where it is most useful, corresponding substantially to the thickness of the heart. In the reset position this additional wheel can introduce a frolic which can easily be reduced by the use of a specially adapted gear profile.

Dans le mode de réalisation préféré, la prise de force est réalisée par une roue chassée sur l'axe de la roue de secondes du mouvement de base.In the preferred embodiment, taking force is achieved by a wheel driven on the axis of the seconds wheel of the basic movement.

L'invention sera mieux comprise à la lecture de la description suivante d'un mode de réalisation préféré, donné à titre d'exemple non limitatif, en référence aux dessins annexés dans lesquels :

  • la figure 1 représente une vue schématique de dessus du mécanisme de chronographe, et
  • la figure 2 représente une vue en coupe selon la ligne II-II de la figure 1 passant par le mécanisme de remise à zéro de l'aiguille de chronographe.
The invention will be better understood on reading the following description of a preferred embodiment, given by way of nonlimiting example, with reference to the appended drawings in which:
  • FIG. 1 represents a schematic top view of the chronograph mechanism, and
  • 2 shows a sectional view along line II-II of Figure 1 passing through the reset mechanism of the chronograph hand.

La montre-chronographe qui va être décrite comporte de façon connue un mouvement horloger, mécanique ou électronique permettant d'afficher sur un cadran, d'une part l'heure courante au moyen de deux aiguilles au centre et d'une petite seconde à 9h, d'autre part un temps chronométré au moyen d'une aiguille de chronographe au centre, d'un compteur des minutes à 3h et d'un compteur des heures à 6h, cette répartition sur le cadran de la petite seconde, des compteurs et de leur nombre pouvant évidemment être modifiés au gré des constructeurs. Ces éléments qui sont connus de l'art antérieur ne seront donc pas décrits davantage.The chronograph watch which will be described comprises in a known manner a watch, mechanical or electronic to display on a dial, a share the current time using two hands in the center and a small second at 9 o'clock, on the other hand a time timed using a chronograph hand at center, a minute counter at 3 o'clock and a counter hours at 6 o'clock, this distribution on the dial of the small seconds, counters and their number can obviously be modified at the option of the manufacturers. These elements which are known from the prior art will therefore not not described further.

En outre, pour une meilleure compréhension de l'invention on a représenté aux figures 1 et 2 uniquement les mobiles de la chaíne cinématique de chronographe nécessaires à la description d'un mécanisme selon l'invention appliquée à la remise à zéro d'une aiguille de chronographe 40. Dans un souci de clarté, les dents des différentes roues ne sont représentées qu'au niveau de leur engrenage, et les emplacements des compteurs sont symbolisés par des vecteurs en pointillé à partir des axes entraínant les aiguilles.In addition, for a better understanding of the invention is shown in Figures 1 and 2 only the mobiles of the chronograph kinematic chain necessary for the description of a mechanism according to the invention applied to the resetting of a needle chronograph 40. For the sake of clarity, the teeth of different wheels are only shown at their gears, and the locations of the counters are symbolized by dotted vectors from the axes driving the needles.

Le mouvement horloger représenté schématiquement par le bloc 1 comporte à sa sortie au moins un axe de force correspondant à l'axe des secondes 2 solidaire d'une roue des secondes 3 en prise avec une roue intermédiaire 4 supportée par un axe 5 pivoté entre une platine supérieure 6 et une platine inférieure 7. La roue intermédiaire 4 est en prise avec une roue 8, dans un rapport 1/1 avec la roue 3, pour entraíner l'aiguille de la petite seconde par l'intermédiaire d'un axe 9. L'axe 5 supporte également un pignon baladeur 11 pouvant embrayer par friction avec la roue 4 lors de la mise en marche du chronographe. Cet embrayage est commandé selon des moyens connus par actionnement d'un poussoir porté par le boítier et agissant sur un jeu de leviers et ressorts non représentés. Ce pignon 11 est en prise avec la roue de chronographe 39, qui est dans un rapport 1/1 avec la roue 3 et qui est supportée par un arbre 13 entraínant l'aiguille de chronographe pour l'affichage 40 de la seconde. Comme on le voit sur la coupe représentée à la figure 2, la roue de chronographe 39 ne comporte le long de l'arbre 13 qu'un seul autre pignon 14, maintenu par une rondelle élastique 15 en appui contre un rebord annulaire 16 de l'arbre 13, et servant de prise de force pour une roue intermédiaire 17 entraínant les autres compteurs 20, 30.The watch movement represented schematically by block 1 has at its outlet at least one axis of force corresponding to the second 2 axis secured to a wheel seconds 3 engaged with an intermediate wheel 4 supported by an axis 5 pivoted between an upper plate 6 and a lower plate 7. The intermediate wheel 4 is engaged with a wheel 8, in a 1/1 ratio with the wheel 3, to drive the small seconds hand by through an axis 9. Axis 5 also supports a sliding pinion 11 which can engage by friction with the wheel 4 when starting the chronograph. This clutch is controlled by means known by actuation of a pusher carried by the housing and acting on a set of levers and springs not represented. This pinion 11 is in engagement with the wheel of chronograph 39, which is in a 1/1 ratio with the wheel 3 and which is supported by a driving shaft 13 the chronograph hand for display 40 of the second. As seen in the section shown in the Figure 2, the chronograph wheel 39 has along of the shaft 13 only one other pinion 14, held by a elastic washer 15 bearing against an annular rim 16 of the shaft 13, and serving as a PTO for a intermediate wheel 17 driving the other counters 20, 30.

En se référant plus particulièrement à la figure 1 et selon un schéma classique, un pignon de réduction 18 monté sur l'axe de la roue intermédiaire 17, est en prise d'une part avec la roue des minutes 19, d'autre part avec un train d'engrenages constitué par des roues et pignons associés 25, 26 et 27, 28 entraínant le compteur des heures 29. Dans le mode de réalisation décrit, la remise à zéro de l'aiguille du compteur de minutes 20 et de l'aiguille du compteur d'heures 30 est effectuée de façon habituelle par des coeurs de remise à zéro pivotés sur les mêmes axes que les roues 19, 29. Par contre, contrairement aux mécanismes connus de l'art antérieur, le coeur de remise à zéro 41 de l'aiguille de chronographe n'est pas supporté par l'arbre 13 de la roue de chronographe 39 mais par l'axe 38 d'une roue supplémentaire 37, en prise avec ladite roue de chronographe 12 et ayant avec celle-ci un rapport 1/1. Cette construction permet donc d'obtenir au centre du mouvement un gain en hauteur sensiblement égal à l'épaisseur du coeur 41, c'est-à-dire à un endroit particulièrement souhaitable pour réserver un espace nécessaire aux autres rouages du mouvement qui entraínent les canons de l'affichage de l'heure courante. On observera également qu'il résulte de cette construction selon l'invention une répartition plus judicieuse des coeurs de remise à zéro à la périphérie, permettant en conséquence de simplifier la conception des leviers et des marteaux (non représentés) qui agiront sur eux, ou d'adapter plus facilement d'autres dispositifs d'actionnement tel que celui décrit dans le document US 5 113 382 déjà cité.With particular reference to Figure 1 and according to a conventional scheme, a reduction pinion 18 mounted on the axis of the intermediate wheel 17, is engaged in a hand with the minute wheel 19, on the other hand with a gear train consisting of wheels and pinions associates 25, 26 and 27, 28 causing the counter of 29 hours. In the embodiment described, the delivery to zero of the minute counter hand 20 and the hour counter hand 30 is made so usual by reset hearts rotated on the same axes as the wheels 19, 29. By cons, unlike to the mechanisms known from the prior art, the heart of resetting the chronograph hand 41 is not supported by the shaft 13 of the chronograph wheel 39 but by the axis 38 of an additional wheel 37, engaged with said chronograph wheel 12 and having with it a 1/1 ratio. This construction therefore makes it possible to obtain center of movement gain in height substantially equal to the thickness of the core 41, that is to say at a place particularly desirable to reserve a space necessary for the other cogs in the movement that drive the canons of the display of the current time. We will also observe that it results from this construction according to the invention a more judicious distribution of reset hearts at the periphery, allowing in consequence of simplifying the design of levers and hammers (not shown) which will act on them, or to adapt other devices more easily such as that described in the document US 5,113,382 already cited.

Bien que l'invention ait été décrite en référence à la remise à zéro de l'aiguille de chronographe, il est possible, sans sortir du cadre de l'invention, d'effectuer diverses modifications ou adaptations, par exemple en appliquant la même construction à d'autres compteurs pour jouir d'une plus grande liberté dans le positionnement des coeurs de remise à zero.Although the invention has been described with reference to resetting the chronograph hand it's possible, without departing from the scope of the invention, to carry out various modifications or adaptations, for example in applying the same construction to other counters for enjoy greater freedom in positioning reset hearts.

Claims (2)

Montre-chronographe à affichage analogique comprenant un mouvement (1) et un mécanisme de chronographe comportant sur un cadran plusieurs compteurs (20, 30, 40) entraínés par une roue (11) embrayable sur une prise de force (4) du mouvement, ledit mécanisme pouvant être remis à zéro par l'actionnement de leviers et de marteaux agissant sur chaque coeur de remise à zéro (21, 31, 41) associé aux roues (19, 29, 39) des compteurs respectifs (20, 30, 40), caractérisé en ce qu'au moins un coeur de remise à zéro est décentré par rapport à la roue de compteur associée en étant pivoté sur l'axe (38) d'une roue supplémentaire (37) engrenant avec ladite roue de compteur en étant dans rapport 1/1 avec celle ci.Chronograph watch with analog display comprising a movement (1) and a mechanism for chronograph with several counters on a dial (20, 30, 40) driven by a gear (11) which can be engaged on a PTO (4) of the movement, said mechanism can be reset to zero by operating levers and of hammers acting on each reset core (21, 31, 41) associated with the wheels (19, 29, 39) of the counters respective (20, 30, 40), characterized in that at least one reset core is off-center with respect to the wheel associated counter by being pivoted on the axis (38) of a additional wheel (37) meshing with said wheel counter being in 1/1 ratio with this one. Montre chronographe selon la revendication 1, caractérisé en ce que le coeur décentré porté par la roue supplémentaire (37) est le coeur de remise à zéro (41) du compteur (40) au centre du cadran pour l'affichage des secondes au moyen de l'aiguille de chronographe.Chronograph watch according to claim 1, characterized in that the off-center core carried by the wheel additional (37) is the reset core (41) of the counter (40) in the center of the dial for displaying seconds using the chronograph hand.
EP97100334A 1997-01-10 1997-01-10 Chronograph watch provided with a mechanism having a reduced height Withdrawn EP0853264A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97100334A EP0853264A3 (en) 1997-01-10 1997-01-10 Chronograph watch provided with a mechanism having a reduced height

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Application Number Priority Date Filing Date Title
EP97100334A EP0853264A3 (en) 1997-01-10 1997-01-10 Chronograph watch provided with a mechanism having a reduced height

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EP0853264A2 true EP0853264A2 (en) 1998-07-15
EP0853264A3 EP0853264A3 (en) 1999-11-24

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113382A (en) 1990-04-12 1992-05-12 Eta Sa Fabriques D'ebauches Chronograph watch
US5280460A (en) 1990-05-21 1994-01-18 Eta S.A. Fabriques D'ebauches Gear mechanism especially for timepiece

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US234768A (en) * 1880-11-23 Carl gantzhoen
CH273743A (en) * 1948-08-26 1951-02-28 Rolex Montres Timepiece with hour and minute counters.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113382A (en) 1990-04-12 1992-05-12 Eta Sa Fabriques D'ebauches Chronograph watch
US5280460A (en) 1990-05-21 1994-01-18 Eta S.A. Fabriques D'ebauches Gear mechanism especially for timepiece

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