EP1136894A1 - Device for return to zero in a chronograph timepiece - Google Patents

Device for return to zero in a chronograph timepiece Download PDF

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Publication number
EP1136894A1
EP1136894A1 EP00810240A EP00810240A EP1136894A1 EP 1136894 A1 EP1136894 A1 EP 1136894A1 EP 00810240 A EP00810240 A EP 00810240A EP 00810240 A EP00810240 A EP 00810240A EP 1136894 A1 EP1136894 A1 EP 1136894A1
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EP
European Patent Office
Prior art keywords
shuttle
fork
return
hammer
clutch
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.)
Granted
Application number
EP00810240A
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German (de)
French (fr)
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EP1136894B1 (en
Inventor
Sylvie Dubois
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.)
DTH Dubois Technique Horlogere SA
Original Assignee
DTH Dubois Technique Horlogere SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DTH Dubois Technique Horlogere SA filed Critical DTH Dubois Technique Horlogere SA
Priority to AT00810240T priority Critical patent/ATE342526T1/en
Priority to EP00810240A priority patent/EP1136894B1/en
Priority to DE60031236T priority patent/DE60031236D1/en
Publication of EP1136894A1 publication Critical patent/EP1136894A1/en
Application granted granted Critical
Publication of EP1136894B1 publication Critical patent/EP1136894B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
    • G04F7/0852—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with member having a rotational two-way movement, e.g. navette

Definitions

  • the present invention relates to a timepiece, in particular a device return to zero of a chronograph.
  • the chronographs usually used have two pushers, one for START / STOP function and the other for RESET (reset). It exists however another family of chronographs that use flight reset.
  • the principle is based on the support of a single pusher which causes the return of the needle at noon and, when the pusher is released, the needle is released. This function has been introduced for pilots who have to stay on course for a while and change to another course according to information received.
  • a flight reset device comprising a clutch friction, actuated by main declutching means, a pusher command and a reset hearts mechanism.
  • This device is characterized in that it comprises secondary declutching means acting when the control button activates the heart mechanism.
  • friction clutch is meant a two-disc clutch, held under pressure by an elastic element. During the return to flight function, the clutch is disengaged leaving free a hammer actuated by pressure on the pusher stop, and which acts on the hearts of counters mounted on a friction, said hammer being lifted by a spring.
  • FIG. 1 describes the system in the engaged state, a figure in which there is a clutch 1 with two discs 2, 3 kept under pressure by the action of a spring 12 ensuring greater precision at the start of the measurement of a short time.
  • the clutch 1 is in constant engagement with the train of the watch in a known manner by one of the wheels 11 of said train meshing with the mobile 3 .
  • the separation of the discs 2 , 3 of the clutch 1 is obtained by a known mechanism of a chronograph function by means of a movable fork 7 actuated by a cam 10 , said fork 7 being held by pressure under the effect of 'a spring 8 .
  • the return-to-flight function is operated by a hammer 4 actuated by the pressure of the STOP pusher and acting on the hearts of counters 5 , 6 mounted on a friction, said hammer being lifted by a spring 15 .
  • the clutch 1 is then disengaged as illustrated in FIGS. 2 and 3 .
  • This is obtained by a shuttle A comprising an inclined plane B , said shuttle A being actuated by a pin C secured to the hammer 4 .
  • the connection between the hammer 4 and the shuttle A is effected by an opening D placed on the shuttle A.
  • the pressure on the pusher of the watch causes, by means of an intermediate rocker 9 , the hammer 4 which will actuate the two hearts 5, 6 secured to the wheels carrying the display needles.
  • the hearts are instantly positioned on the planes 20, 30 resting on the hammer 4 ..
  • the declutching delay is synchronized by the pin C which simultaneously drives the shuttle A which, by its inclined plane B , will raise the fork 7 , disengaging thus clutch 1 .
  • the time delay is obtained by the position of the pin C which is slightly ahead of the action of the hearts 5, 6.
  • the shuttle A is not integral with the hammer 4 .
  • the shuttle A is pushed by the hammer 4 , and the return to the clutch position is ensured by a spring Z.
  • the shuttle acts on the fork 7 tangentially by means of different inclined planes.
  • the inclined plane described above on the shuttle A is located on the fork 7 .
  • the shuttle as well as the fork has inclined planes.

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

Abstract

The drive from the main timepiece mechanism (11) passes to the display axes through a friction clutch (1) maintained in contact by a spring (12). When a return to zero with the timepiece in motion is required a hammer (4) operates on the hearts (5,6) on the display axes and in addition actuates a shuttle (A) with an inclined plane (B) such that the upper disk (2) of the clutch is lifted against the spring

Description

La présente invention a pour objet une pièce d'horlogerie, en particulier un dispositif de retour à zéro d'un chronographe.The present invention relates to a timepiece, in particular a device return to zero of a chronograph.

Les chronographes usuellement utilisés possèdent deux poussoirs, l'un pour la fonction START/STOP et l'autre pour la fonction RESET (remise à zéro). Il existe néanmoins une autre famille de chronographe qui utilisent la remise à zéro en vol.The chronographs usually used have two pushers, one for START / STOP function and the other for RESET (reset). It exists however another family of chronographs that use flight reset.

Le principe est basé sur l'appui d'un seul poussoir qui provoque le retour de l'aiguille à midi et, lorsque le poussoir est relâché, l'aiguille est libérée. Cette fonction a été introduite pour les pilotes qui doivent garder un cap pendant un certain temps et changer pour un autre cap selon une information reçue.The principle is based on the support of a single pusher which causes the return of the needle at noon and, when the pusher is released, the needle is released. This function has been introduced for pilots who have to stay on course for a while and change to another course according to information received.

On connaít de tels systèmes appliqués à des chronographes dont l'enclenchement s'obtient par un engrenage en champ, au moyen d'une roue sur champ montée sur la roue de moyenne du rouage de finissage, laquelle par l'intermédiaire d'un renvoi, s'engrène avec la roue du chronographe. Ce système a une précision relative du fait de la pénétration des dentures d'un pas angulaire différent entre elles.We know of such systems applied to chronographs whose engagement is obtained by a field gear, by means of a field wheel mounted on the average wheel of the gear train, which by means of a reference, meshes with the chronograph wheel. This system has relative accuracy due to the fact of the penetration of the teeth of a different angular pitch therebetween.

De plus, lors d'une fonction de retour en vol, le fait de relever obligatoirement la bascule d'embrayage, comportant la roue sur champ et le renvoi, est complexe.In addition, during a return to flight function, the fact that the clutch lever, comprising the wheel on the field and the return, is complex.

Pour réaliser l'entraínement du mécanisme, un autre système est connu utilisant un embrayage par friction. Ce système a l'avantage d'être très précis car indépendant de la pénétration des dentures.To carry out the training of the mechanism, another system is known using a friction clutch. This system has the advantage of being very precise because it is independent penetration of the teeth.

Un tel système ne peut garantir une fiabilité à long terme, du fait des différents sens de rotation engendrés par la position des mobiles comportant les coeurs. Les frictions peuvent provoquer une usure de l'embrayage de la roue et de plus, les coeurs étant disposés sur des roues indirectes, la précision lors du retour à zéro est relative aux jeux d'engrenages. De surcroít, un maintien de la pression sur le marteau, de par les couples antagonistes des rouages, provoque un arrêt de la montre.Such a system cannot guarantee long-term reliability, due to the different senses of rotation generated by the position of the mobiles comprising the hearts. Friction can cause wear of the wheel clutch and more, the hearts being arranged on indirect wheels, the precision when returning to zero is relative to the gear sets. In addition, maintaining the pressure on the hammer, by the antagonistic pairs of cogs, causes the watch to stop.

C'est pourquoi le but de la présente invention est de disposer d'un système d'embrayage à friction qui n'a pas les inconvénients cités ci-dessus. This is why the aim of the present invention is to have a system friction clutch which does not have the drawbacks mentioned above.

Ce but est atteint par un dispositif de remise à zéro en vol comprenant un embrayage à friction, actionné par des moyens de débrayage principaux, un poussoir de commande et un mécanisme de coeurs de remise à zéro. Ce dispositif est caractérisé en ce qu'il comprend des moyens de débrayage secondaires agissant lorsque le poussoir de commande actionne le mécanisme des coeurs.This object is achieved by a flight reset device comprising a clutch friction, actuated by main declutching means, a pusher command and a reset hearts mechanism. This device is characterized in that it comprises secondary declutching means acting when the control button activates the heart mechanism.

Par embrayage à friction, on entend un embrayage à deux disques, maintenus sous pression par un élément élastique. Lors de la fonction de retour en vol, l'embrayage est débrayé laissant alors libre un marteau actionné par la pression sur le poussoir stop, et qui agit sur les coeurs de compteurs montés sur une friction, ledit marteau étant relevé par un ressort.By friction clutch is meant a two-disc clutch, held under pressure by an elastic element. During the return to flight function, the clutch is disengaged leaving free a hammer actuated by pressure on the pusher stop, and which acts on the hearts of counters mounted on a friction, said hammer being lifted by a spring.

La présente invention sera comprise plus en détail grâce aux dessins suivants, pris à titre non limitatifs, dans lesquels:

  • la figure 1 représente le mécanisme à l'état embrayé,
  • la figure 2 représente le mécanisme à l'état débrayé,
  • la figure 3 représente une vue de dessus du mécanisme de débrayage,
  • la figure 4 représente une vue de dessus d'une variante de l'invention.
The present invention will be understood in more detail by means of the following drawings, taken without limitation, in which:
  • FIG. 1 represents the mechanism in the engaged state,
  • FIG. 2 represents the mechanism in the disengaged state,
  • FIG. 3 represents a top view of the declutching mechanism,
  • Figure 4 shows a top view of a variant of the invention.

La figure 1 décrit le système à l'état embrayé, figure sur laquelle on distingue un embrayage 1 à deux disques 2, 3 maintenus en pression sous l'action d'un ressort 12 assurant une plus grande précision de départ de la mesure d'un temps court. L'embrayage 1 est en prise constante avec le rouage de la montre de manière connue par une des roues 11 dudit rouage s'engrenant avec le mobile 3. La séparation des disques 2, 3 de l'embrayage 1 s'obtient par un mécanisme connu d'une fonction chronographe au moyen d'une fourchette mobile 7 actionnée par une came 10, ladite fourchette 7 étant maintenue par pression sous l'effet d'un ressort 8. La fonction retour en vol s'opère par un marteau 4 actionné par la pression du poussoir STOP et agissant sur les coeurs de compteurs 5, 6 montés sur une friction, ledit marteau étant relevé par un ressort 15.FIG. 1 describes the system in the engaged state, a figure in which there is a clutch 1 with two discs 2, 3 kept under pressure by the action of a spring 12 ensuring greater precision at the start of the measurement of a short time. The clutch 1 is in constant engagement with the train of the watch in a known manner by one of the wheels 11 of said train meshing with the mobile 3 . The separation of the discs 2 , 3 of the clutch 1 is obtained by a known mechanism of a chronograph function by means of a movable fork 7 actuated by a cam 10 , said fork 7 being held by pressure under the effect of 'a spring 8 . The return-to-flight function is operated by a hammer 4 actuated by the pressure of the STOP pusher and acting on the hearts of counters 5 , 6 mounted on a friction, said hammer being lifted by a spring 15 .

Selon l'invention, au moment du retour à zéro à la volée, l'embrayage 1 est alors débrayé tel qu'illustré sur les figures 2 et 3. Ceci s'obtient par une navette A comportant un plan incliné B, ladite navette A étant actionnée par une goupille C solidaire du marteau 4. La liaison entre le marteau 4 et la navette A s'effectuant par une ouverture D placée sur la navette A.According to the invention, at the moment of return to zero on the fly, the clutch 1 is then disengaged as illustrated in FIGS. 2 and 3 . This is obtained by a shuttle A comprising an inclined plane B , said shuttle A being actuated by a pin C secured to the hammer 4 . The connection between the hammer 4 and the shuttle A is effected by an opening D placed on the shuttle A.

Lors de la fonction de retour en vol, la pression sur le poussoir de la montre entraíne, au moyen d'une bascule intermédiaire 9, le marteau 4 qui va actionner les deux coeurs 5, 6 solidaires des roues portant les aiguilles d'affichage. Les coeurs se positionnent instantanément sur les plans 20, 30 en appui sur le marteau 4.. La temporisation de débrayage est synchronisée par la goupille C qui entraíne simultanément la navette A qui, par son plan incliné B, va lever la fourchette 7, débrayant ainsi l'embrayage 1. La temporisation est obtenue par la position de la goupille C qui se trouve légèrement en avance sur l'action des coeurs 5, 6. Dès cette fonction terminée, un maintien de la pression, par le fait du débrayage, ne provoque pas l'arrêt de la montre.During the return to flight function, the pressure on the pusher of the watch causes, by means of an intermediate rocker 9 , the hammer 4 which will actuate the two hearts 5, 6 secured to the wheels carrying the display needles. The hearts are instantly positioned on the planes 20, 30 resting on the hammer 4 .. The declutching delay is synchronized by the pin C which simultaneously drives the shuttle A which, by its inclined plane B , will raise the fork 7 , disengaging thus clutch 1 . The time delay is obtained by the position of the pin C which is slightly ahead of the action of the hearts 5, 6. As soon as this function is completed, maintaining the pressure, by the fact of disengaging, does not cause the stop of the watch.

En relâchant cette pression, le système est ramené en arrière sous l'effet d'un ressort 15 en liaison avec la goupille C. Le système est ainsi parfaitement synchronisé et le comptage recommence depuis la position initiale.By releasing this pressure, the system is brought back under the effect of a spring 15 in connection with the pin C. The system is thus perfectly synchronized and counting starts again from the initial position.

Selon une variante de l'invention, la navette A n'est pas solidaire avec le marteau 4. Sur la figure 4, la navette A est poussée par le marteau 4, et le retour à la position d'embrayage est assurée par un ressort Z. La navette agit sur la fourchette 7 de manière tangentielle au moyen de différents plans inclinés.According to a variant of the invention, the shuttle A is not integral with the hammer 4 . In FIG. 4 , the shuttle A is pushed by the hammer 4 , and the return to the clutch position is ensured by a spring Z. The shuttle acts on the fork 7 tangentially by means of different inclined planes.

Selon une forme d'exécution, le plan incliné décrit précédemment sur la navette A est situé sur la fourchette 7. Selon une autre forme de réalisation, la navette de même que la fourchette comporte des plans inclinés.According to one embodiment, the inclined plane described above on the shuttle A is located on the fork 7 . According to another embodiment, the shuttle as well as the fork has inclined planes.

Le présente description est nullement limitative au mode d'actionnement des différents éléments, que ce soit de la navette, ou de l'embrayage. Il existe en effet d'autres pièces connues pour actionner de telles pièces mécaniques.The present description is in no way limiting on the mode of actuation of the different elements, whether it be the shuttle or the clutch. There is indeed other parts known to actuate such mechanical parts.

Toutes les pièces équivalentes qui visent le même but que l'invention, à savoir le débrayage d'un embrayage à friction d'un chronographe lors de sa remise à zéro en vol, est compris dans la présente invention.All equivalent parts which have the same aim as the invention, namely the declutching a friction clutch of a chronograph when resetting it to zero vol, is included in the present invention.

Claims (8)

Dispositif de remise à zéro en vol pour chronographe, comprenant un embrayage à friction (1), des moyens de débrayage principaux (7, 10), un poussoir de commande et un mécanisme de coeurs de remise à zéro (4, 5, 6), caractérisé en ce qu'il comprend des moyens de débrayage secondaires (A) agissant lorsque le poussoir de commande actionne le mécanisme des coeurs.Flight reset device for chronograph, comprising a friction clutch (1), main release means (7, 10), a control push-button and a reset hearts mechanism (4, 5, 6) , characterized in that it comprises secondary declutching means (A) acting when the control pusher actuates the mechanism of the hearts. Dispositif selon la revendication 1, caractérisé en ce que les moyens de débrayage principaux comprennent une fourchette (7) et en ce que les moyens de débrayage secondaires comprennent une navette (A) actionnée par un marteau (4) du mécanisme de coeurs.Device according to claim 1, characterized in that the main declutching means comprise a fork (7) and in that the secondary declutching means comprise a shuttle (A) actuated by a hammer (4) of the heart mechanism. Dispositif selon la revendication 2, caractérisé en ce que la navette (A) engage la fourchette (7) par la pression du marteau (4).Device according to claim 2, characterized in that the shuttle (A) engages the fork (7) by the pressure of the hammer (4). Dispositif selon la revendication 3, caractérisé en ce que l'engagement entre la navette (A) et la fourchette (7) se fait par un plan incliné (B).Device according to claim 3, characterized in that the engagement between the shuttle (A) and the fork (7) is by an inclined plane (B). Dispositif selon la revendication 4, caractérisé en ce que le plan incliné est placé sur la navette (A).Device according to claim 4, characterized in that the inclined plane is placed on the shuttle (A). Dispositif selon la revendication 4, caractérisé en ce que le plan incliné est placé sur la fourchette (7).Device according to claim 4, characterized in that the inclined plane is placed on the fork (7). Dispositif selon la revendication 4, caractérisé en ce que le plan incliné est placé sur la navette (A) et la fourchette (7).Device according to claim 4, characterized in that the inclined plane is placed on the shuttle (A) and the fork (7). Chronographe comprenant le dispositif selon l'une des revendications 1 à 7.Chronograph comprising the device according to one of claims 1 to 7.
EP00810240A 2000-03-20 2000-03-20 Device for return to zero in a chronograph timepiece Expired - Lifetime EP1136894B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT00810240T ATE342526T1 (en) 2000-03-20 2000-03-20 DEVICE FOR ZERO RESETTING IN A CHRONOGRAPH WATCH
EP00810240A EP1136894B1 (en) 2000-03-20 2000-03-20 Device for return to zero in a chronograph timepiece
DE60031236T DE60031236D1 (en) 2000-03-20 2000-03-20 Device for zero reset in a chronograph watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00810240A EP1136894B1 (en) 2000-03-20 2000-03-20 Device for return to zero in a chronograph timepiece

Publications (2)

Publication Number Publication Date
EP1136894A1 true EP1136894A1 (en) 2001-09-26
EP1136894B1 EP1136894B1 (en) 2006-10-11

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EP00810240A Expired - Lifetime EP1136894B1 (en) 2000-03-20 2000-03-20 Device for return to zero in a chronograph timepiece

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EP (1) EP1136894B1 (en)
AT (1) ATE342526T1 (en)
DE (1) DE60031236D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1406132A1 (en) * 2002-10-04 2004-04-07 ETA SA Manufacture Horlogère Suisse Coupling mechanism for a chronographe
EP1462882A2 (en) * 2003-03-27 2004-09-29 Seiko Instruments Inc. Chronograph timepiece having an hour/minute coupling lever
EP2410388A1 (en) * 2010-07-21 2012-01-25 Blancpain S.A. Time piece with double display
EP2541346A2 (en) 2011-06-29 2013-01-02 Rolex S.A. Device for resetting a component indicating a time-related magnitude to a predetermined position

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1412340A (en) * 1972-03-15 1975-11-05 Ebauches Sa Chronograph timepiece
EP0772104A1 (en) * 1995-10-31 1997-05-07 Montres Rolex Sa Timepiece with a chronograph mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1412340A (en) * 1972-03-15 1975-11-05 Ebauches Sa Chronograph timepiece
EP0772104A1 (en) * 1995-10-31 1997-05-07 Montres Rolex Sa Timepiece with a chronograph mechanism

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1406132A1 (en) * 2002-10-04 2004-04-07 ETA SA Manufacture Horlogère Suisse Coupling mechanism for a chronographe
SG107155A1 (en) * 2002-10-04 2004-11-29 Eta Sa Mft Horlogere Suisse Chronograph coupling mechanism
US7021818B2 (en) 2002-10-04 2006-04-04 Eta Sa Manufacture Horlogère Suisse Chronograph coupling mechanism
KR100972914B1 (en) 2002-10-04 2010-07-28 에타 쏘시에떼 아노님 마누팍투레 홀로게레 스위세 Chronograph coupling mechanism
EP1462882A2 (en) * 2003-03-27 2004-09-29 Seiko Instruments Inc. Chronograph timepiece having an hour/minute coupling lever
EP1462882A3 (en) * 2003-03-27 2006-01-04 Seiko Instruments Inc. Chronograph timepiece having an hour/minute coupling lever
CN102346426A (en) * 2010-07-21 2012-02-08 布朗潘有限公司 Time piece with double display
WO2012010392A2 (en) 2010-07-21 2012-01-26 Blancpain Sa Dual display timepiece
EP2410388A1 (en) * 2010-07-21 2012-01-25 Blancpain S.A. Time piece with double display
JP2012027023A (en) * 2010-07-21 2012-02-09 Blancpain Sa Dual display time piece
WO2012010392A3 (en) * 2010-07-21 2012-04-26 Blancpain Sa Dual display timepiece
CN102346426B (en) * 2010-07-21 2013-08-14 布朗潘有限公司 Time piece with double display
KR101375452B1 (en) * 2010-07-21 2014-03-17 불랑패인쏘시에떼아노님 Dual display timepiece
US8848488B2 (en) 2010-07-21 2014-09-30 Blancpain S.A. Dual display timepiece
EP2541346A2 (en) 2011-06-29 2013-01-02 Rolex S.A. Device for resetting a component indicating a time-related magnitude to a predetermined position
US9146541B2 (en) 2011-06-29 2015-09-29 Rolex S.A. Device for resetting to a predetermined position an indicator member indicative of a parameter connected with time
EP3800515A1 (en) 2011-06-29 2021-04-07 Rolex Sa Device for resetting a component indicating a time-related magnitude to a predetermined position

Also Published As

Publication number Publication date
EP1136894B1 (en) 2006-10-11
DE60031236D1 (en) 2006-11-23
ATE342526T1 (en) 2006-11-15

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