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EP1801668B1 - Anti-tripping device for timepiece escapement - Google Patents

Anti-tripping device for timepiece escapement Download PDF

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Publication number
EP1801668B1
EP1801668B1 EP05112521A EP05112521A EP1801668B1 EP 1801668 B1 EP1801668 B1 EP 1801668B1 EP 05112521 A EP05112521 A EP 05112521A EP 05112521 A EP05112521 A EP 05112521A EP 1801668 B1 EP1801668 B1 EP 1801668B1
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EP
European Patent Office
Prior art keywords
balance
rotation
pinion
beyond
normal angle
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.)
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Application number
EP05112521A
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German (de)
French (fr)
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EP1801668A1 (en
Inventor
Dominique Léchot
Alain Zaugg
Thierry Conus
Andréas Cabezas Jurin
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.)
Montres Breguet SA
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Montres Breguet SA
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Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to DE602005005209T priority Critical patent/DE602005005209T2/en
Priority to EP05112521A priority patent/EP1801668B1/en
Priority to AT05112521T priority patent/ATE388428T1/en
Priority to SG200608687-0A priority patent/SG133528A1/en
Priority to US11/610,961 priority patent/US7527424B2/en
Priority to JP2006336611A priority patent/JP4795218B2/en
Priority to CN2006101687844A priority patent/CN1987686B/en
Publication of EP1801668A1 publication Critical patent/EP1801668A1/en
Priority to HK07109651.4A priority patent/HK1104621A1/en
Application granted granted Critical
Publication of EP1801668B1 publication Critical patent/EP1801668B1/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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/26—Compensation of mechanisms for stabilising frequency for the effect of variations of the impulses

Definitions

  • the present invention relates to an antigalop device for a timepiece escapement essentially comprising a balance spring, this device to prevent the angular extension of said balance beyond a normal angle of rotation.
  • This device is implemented on an escapement comprising inter alia a spiral composed of several turns and a rocker provided with at least one arm, this rocker being pivotally mounted between a plate and a bridge.
  • the device comprises a finger fixed on the balance arm, two columns between which can pass the finger when the pendulum is in motion, these columns being integral with the balance bridge, and a locking arm attached to the outer turn of the balance spring.
  • the locking arm is capable of interposing between these columns and this finger to prevent the rotation of the balance beyond an angle exceeding its normal operating angle.
  • This device is implemented in so-called expansion escapements that are suitable for large timepieces such as marine chronometers. These parts are appreciated for their great precision, which is why it is very often called a relaxation exhaust itself renowned for its high accuracy.
  • This exhaust has a significant defect, namely its sensitivity to shocks. Because of this, it is deemed not to be well suited to wristwatches. Indeed a shock applied to the timepiece can cause the pendulum to rotate beyond a normal operating angle. It then occurs, at least for a direction of rotation of the balance, a gallop because two clearances and two pulses occur during the same alternation.
  • the solution proposed by Alois Irk described above could be applied to a wristwatch but seems to immediately have at least two disadvantages.
  • the first drawback appears to be the use of a locking arm attached to an elastic element, in this case the outer coil of the spiral. It is a non-mechanical solution, prone to all kinds of hazards related to the elasticity of the hairspring that can deform unexpectedly, and precisely following a shock applied to the watch.
  • the second disadvantage lies in the fact that the Irk system operates only in a direction of rotation of the balance, the direction of the largest expansion of the spiral. In the other direction, the direction of the contraction of the hairspring, the exhaust can also gallop and the Irk system remains ineffective.
  • the present invention besides it obeys the generic definition in the first paragraph of this description, is remarkable in that the shaft which is equipped with the balance is provided with a gear meshing with means preventing said balance to rotate beyond a normal angle of rotation, regardless of the direction of rotation.
  • the attached figures show two embodiments of the antigalop device according to the invention.
  • This device is intended for a clock escapement, more particularly, but not exclusively for a detent escapement, of which only the elements necessary for the understanding of the invention are represented in the figures, namely essentially a spiral balance 1.
  • the device antigalop aims to prevent the angular extension of the balance beyond a normal angle of operation or rotation.
  • the expansion escapement is taken here as an example to which the antigalop device can be applied.
  • This exhaust further includes the following elements: shown in the drawings, but clearly visible in the document EP-A 1,538,491 mentioned above, namely: an escape wheel provided with generally pointed teeth which rest in turn on a pallet of rest, a toggle blocker, this blocker carrying at its first end said pallet rest and its second end a first actuating finger capable of being actuated by a second actuating finger carried by a plate integral with the balance, this plate also carrying a pulse pallet adapted to receive pulses from the teeth of the wheel 'exhaust.
  • the pallet rest is released from the tooth of the escape wheel and another tooth of the same wheel, acting on the pulse pallet, gives a pulse to the balance.
  • the second actuating finger is arranged so as to actuate the first finger of the blocker only in a direction of rotation of the balance, that is to say at the first oscillation alternation following what is the impulse?
  • the rocker rotates in the other direction, that is to say during the second alternation of the oscillation, the first finger of the blocker is not actuated because the second finger carried by the plate is arranged for s' then hide from what no impulse occurs.
  • the first finger of the blocker can be operated a second time. There is then a second pulse during the same alternation, which causes the escapement to gallop. It will also be understood that if the second alternation causes the balance to rotate beyond its normal range of operation, the second finger carried by the plate can retract a second time following which, by changing the direction of rotation of the plate, said second finger causes the release of the pallet of rest, then an unwanted pulse, thus distorting the isochronism of the oscillator.
  • the present invention is remarkable in that, and as shown in all the accompanying figures, the shaft 2 which is equipped with the balance 1 is equipped with a gear 3 meshing with means 4 preventing said balance 1 to rotate beyond a normal rotation angle and this whatever the direction of this rotation.
  • the Figures 1 and 2 show a first embodiment of the invention.
  • the means 4 preventing the rocker 1 from rotating beyond a normal angle of rotation consist of a gear 5 meshing with the pinion 3 carried by the shaft 2 of the rocker 1.
  • This wheel 5 carries at least two spokes 6 and 7 likely to abut against a fixed stop 8 if the rocker 1 is driven beyond its normal angle of rotation.
  • the figure 2 shows more precisely that the fixed stop 8 is a pin 13 driven into the plate 15 that includes the timepiece.
  • the Figures 3 and 4 show a second embodiment of the invention.
  • the means 4 preventing the balance 1 from turning beyond a normal angle of rotation consist of a pivoted toothed sector forming a rake 9.
  • This rake 9 carries two terminal rays 10 and 11 may abut against a fixed stop 8 if the pendulum is driven beyond its normal angle of rotation.
  • the figure 4 shows more precisely that the fixed stop 8 is a pin 14 screwed into the plate 15 that includes the timepiece.
  • the spokes 6 and 7 of the wheel 5 and the terminal radii 10 and 11 of the rake 9 prevent the balance 1 from turning beyond its normal operating angle, whatever its meaning. rotation, which has an advantage over the system proposed above by Alois Irk where this limitation occurs only in a direction of rotation of the balance. It will also be observed that the present invention uses a mechanical connection that could be called rigid between the balance and the means of limiting its stroke since it uses a gear connection without any elastic element as proposed by Alois Irk .
  • the toothed wheel 5 may only carry one spoke, in this case, of course, the gear ratio will be adopted between this wheel and the pinion 3 so that the arm abuts against the fixed stop. 8 if the pendulum is driven beyond the normal angle.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gears, Cams (AREA)
  • Transmission Devices (AREA)
  • Electromechanical Clocks (AREA)
  • Mechanical Operated Clutches (AREA)
  • Control Of Turbines (AREA)
  • Saccharide Compounds (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Abstract

The device has a sprung balance (1) and an arbour fitted to the balance which has a pinion (3) meshing for preventing the balance from rotating beyond normal angle of rotation, whatever the direction of rotation. A toothed wheel meshing with the pinion for carrying out several spoke to abut against a fixed stop member (8) such as pin (14) if the balance is driven beyond the normal angle of rotation.

Description

La présente invention est relative à un dispositif antigalop pour un échappement de pièce d'horlogerie incluant essentiellement un balancier-spiral, ce dispositif visant à empêcher l'extension angulaire dudit balancier au delà d'un angle normal de rotation.The present invention relates to an antigalop device for a timepiece escapement essentially comprising a balance spring, this device to prevent the angular extension of said balance beyond a normal angle of rotation.

On trouve dans la littérature plusieurs systèmes de dispositif antigalop. Un de ceux-ci a été décrit dans l'ouvrage intitulé " Der Chronometer Gang" dû au professeur Alois Irk et publié par Deutsche Uhrmacher Zeitung. Berlin 1923 . On se référera particulièrement aux paragraphes 116 à 120 (pages 74 à 77) et à la figure 25 de l'ouvrage cité. Ce dispositif est mis en oeuvre sur un échappement comprenant entre autres un spiral composé de plusieurs spires et un balancier pourvu d'au moins un bras, ce balancier étant monté à pivotement entre une platine et un pont. Le dispositif comprend un doigt fixé sur le bras du balancier, deux colonnes entre lesquelles peut passer le doigt quand le balancier est en mouvement, ces colonnes étant solidaires du pont de balancier, et un bras de blocage fixé sur la spire extérieure du spiral. Le bras de blocage est susceptible de s'interposer entre ces colonnes et ce doigt pour empêcher la rotation du balancier au delà d'un angle dépassant son angle de fonctionnement normal.Several antigalop device systems are found in the literature. One of these has been described in the book entitled " Der Chronometer Gang "by Professor Alois Irk and published by Deutsche Uhrmacher Zeitung Berlin 1923 . Reference is made to paragraphs 116 to 120 (pages 74 to 77) and figure 25 of the cited work. This device is implemented on an escapement comprising inter alia a spiral composed of several turns and a rocker provided with at least one arm, this rocker being pivotally mounted between a plate and a bridge. The device comprises a finger fixed on the balance arm, two columns between which can pass the finger when the pendulum is in motion, these columns being integral with the balance bridge, and a locking arm attached to the outer turn of the balance spring. The locking arm is capable of interposing between these columns and this finger to prevent the rotation of the balance beyond an angle exceeding its normal operating angle.

Un dispositif pareil est aussi divulgué dans CH 28540 .A similar device is also disclosed in CH 28540 .

Ce dispositif est mis en oeuvre dans les échappements dits à détente qui conviennent à des pièces d'horlogerie de grande dimension comme des chronomètres de marine. Ces pièces sont appréciées pour leur grande précision, raison pour laquelle il est fait appel très souvent à un échappement à détente lui-même réputé pour sa grande précision. Cet échappement cependant présente un défaut important, à savoir sa sensibilité aux chocs. De ce fait, il est réputé ne pas bien convenir aux montres-bracelet. En effet un choc appliqué à la pièce d'horlogerie peut amener son balancier à tourner au-delà d'un angle normal de fonctionnement. Il se produit alors, au moins pour un sens de rotation du balancier, un galop car deux dégagements et deux impulsions ont lieu pendant la même alternance.This device is implemented in so-called expansion escapements that are suitable for large timepieces such as marine chronometers. These parts are appreciated for their great precision, which is why it is very often called a relaxation exhaust itself renowned for its high accuracy. This exhaust, however, has a significant defect, namely its sensitivity to shocks. Because of this, it is deemed not to be well suited to wristwatches. Indeed a shock applied to the timepiece can cause the pendulum to rotate beyond a normal operating angle. It then occurs, at least for a direction of rotation of the balance, a gallop because two clearances and two pulses occur during the same alternation.

Lorsque l'on désire équiper une pièce d'horlogerie de petite dimension, par exemple une montre-bracelet, d'un échappement à détente pour remplacer par exemple l'échappement à ancre classique et la faire bénéficier ainsi des avantages conférés par cet échappement, il s'agira d'utiliser de nouvelles techniques différentes de celles connues jusqu'à aujourd'hui si l'on ne veut pas aboutir à un échec. Diverses solutions ont été proposées récemment pour pallier le manque d'énergie développée par le balancier-spiral d'une montre-bracelet pour vaincre les forces agissant sur la détente d'un échappement à détente. Une solution est exposée, par exemple, dans le document EP-A 1 538 491 . Il n'est reste pas moins que le problème du galop demeure et qu'il s'agit de le résoudre lorsqu'on a affaire à un spiral de petite dimension, tel celui monté sur une montre-bracelet.When it is desired to equip a small timepiece, for example a wristwatch, with a detent escapement to replace for example the classic anchor escapement and thus benefit from the advantages conferred by this escapement, it will be using new techniques different from those known until today if we do not want to lead to failure. Various solutions have been proposed recently to overcome the lack of energy developed by the sprung balance of a wristwatch to overcome the forces acting on the trigger of a detent escapement. A solution is exposed, for example, in the document EP-A 1,538,491 . Nevertheless, the problem of galloping remains and it is to solve it when dealing with a small spiral, such as the one mounted on a wristwatch.

La solution proposée par Alois Irk décrite ci-dessus pourrait être appliquée à une montre-bracelet mais semble présenter d'emblée au moins deux inconvénients. Le premier inconvénient parait être l'emploi d'un bras de blocage fixé sur un élément élastique, en l'occurrence la spire extérieure du spiral. C'est une solution peu mécanique, sujette à toutes sortes d'aléas liés à l'élasticité du spiral qui peut se déformer de façon inattendue, et précisément à la suite d'un choc appliqué à la montre. Le second inconvénient réside dans le fait que le système Irk ne fonctionne que dans un sens de rotation du balancier, le sens de la plus grande expansion du spiral. Dans l'autre sens, le sens de la contraction du spiral, l'échappement peut aussi galoper et le système Irk reste alors inefficace.The solution proposed by Alois Irk described above could be applied to a wristwatch but seems to immediately have at least two disadvantages. The first drawback appears to be the use of a locking arm attached to an elastic element, in this case the outer coil of the spiral. It is a non-mechanical solution, prone to all kinds of hazards related to the elasticity of the hairspring that can deform unexpectedly, and precisely following a shock applied to the watch. The second disadvantage lies in the fact that the Irk system operates only in a direction of rotation of the balance, the direction of the largest expansion of the spiral. In the other direction, the direction of the contraction of the hairspring, the exhaust can also gallop and the Irk system remains ineffective.

Pour pallier les inconvénients cités, la présente invention, outre qu'elle obéit à la définition générique posée au premier paragraphe de cette description, est remarquable en ce que l'arbre dont est équipé le balancier est muni d'un pignon engrenant avec des moyens empêchant ledit balancier de tourner au delà d'un angle normal de rotation, quel que soit le sens de cette rotation.To overcome the disadvantages mentioned, the present invention, besides it obeys the generic definition in the first paragraph of this description, is remarkable in that the shaft which is equipped with the balance is provided with a gear meshing with means preventing said balance to rotate beyond a normal angle of rotation, regardless of the direction of rotation.

Les caractéristiques et avantages de la présente invention ressortiront de la description qui va suivre, faite en regard des dessins annexés, et donnant à titre d'exemple explicatif, mais nullement limitatif, deux formes avantageuses de réalisation, dessins dans lesquels:

  • la figure 1 est une vue en plan du dispositif antigalop selon une première forme d'exécution,
  • la figure 2 est une vue en coupe de la forme d'exécution montrée en figure 1,
  • la figure 3 est une vue en plan du dispositif antigalop selon une seconde forme d'exécution, et
  • la figure 4 est une vue en coupe de la forme d'exécution montrée en figure 3.
The features and advantages of the present invention will emerge from the description which follows, given with reference to the appended drawings, and giving by way of illustrative but not limiting example two advantageous embodiments, drawings in which:
  • the figure 1 is a plan view of the antigalop device according to a first embodiment,
  • the figure 2 is a sectional view of the embodiment shown in figure 1 ,
  • the figure 3 is a plan view of the antigalop device according to a second embodiment, and
  • the figure 4 is a sectional view of the embodiment shown in figure 3 .

Les figures annexées montrent deux formes d'exécution du dispositif antigalop selon l'invention. Ce dispositif est destiné à un échappement d'horlogerie, plus particulièrement, mais pas exclusivement à un échappement à détente dont ne sont représentés aux figures que les éléments nécessaires à la compréhension de l'invention à savoir essentiellement un balancier-spiral 1. Le dispositif antigalop vise à empêcher l'extension angulaire du balancier au delà d'un angle normal de fonctionnement ou de rotation.The attached figures show two embodiments of the antigalop device according to the invention. This device is intended for a clock escapement, more particularly, but not exclusively for a detent escapement, of which only the elements necessary for the understanding of the invention are represented in the figures, namely essentially a spiral balance 1. The device antigalop aims to prevent the angular extension of the balance beyond a normal angle of operation or rotation.

L'échappement à détente est pris ici comme exemple auquel peut s'appliquer le dispositif antigalop. Cet échappement comporte en outre les éléments suivants non représentés aux dessins, mais bien apparents dans le document EP-A 1 538 491 cité ci-dessus, à savoir: une roue d'échappement munie de dents généralement pointues qui reposent à tour de rôle sur une palette de repos, un bloqueur à bascule, ce bloqueur portant à sa première extrémité ladite palette de repos et à sa seconde extrémité un premier doigt d'actionnement susceptible d'être actionné par un second doigt d'actionnement porté par un plateau solidaire du balancier, ce plateau portant en outre une palette d'impulsion apte à recevoir des impulsions en provenance des dents de la roue d'échappement. A chaque oscillation du balancier, la palette de repos est dégagée de la dent de la roue d'échappement et une autre dent de la même roue, agissant sur la palette d'impulsion, donne une impulsion au balancier. On observera que le second doigt d'actionnement est arrangé de façon à n'actionner le premier doigt du bloqueur que dans un sens de rotation du balancier, c'est-à-dire lors de la première alternance de l'oscillation en suite de quoi a lieu l'impulsion. Quand le balancier tourne dans l'autre sens, c'est-à-dire lors de la seconde alternance de l'oscillation, le premier doigt du bloqueur n'est pas actionné car le second doigt porté par le plateau est arrangé pour s'escamoter ensuite de quoi aucune impulsion ne se produit.The expansion escapement is taken here as an example to which the antigalop device can be applied. This exhaust further includes the following elements: shown in the drawings, but clearly visible in the document EP-A 1,538,491 mentioned above, namely: an escape wheel provided with generally pointed teeth which rest in turn on a pallet of rest, a toggle blocker, this blocker carrying at its first end said pallet rest and its second end a first actuating finger capable of being actuated by a second actuating finger carried by a plate integral with the balance, this plate also carrying a pulse pallet adapted to receive pulses from the teeth of the wheel 'exhaust. At each oscillation of the balance, the pallet rest is released from the tooth of the escape wheel and another tooth of the same wheel, acting on the pulse pallet, gives a pulse to the balance. It will be observed that the second actuating finger is arranged so as to actuate the first finger of the blocker only in a direction of rotation of the balance, that is to say at the first oscillation alternation following what is the impulse? When the rocker rotates in the other direction, that is to say during the second alternation of the oscillation, the first finger of the blocker is not actuated because the second finger carried by the plate is arranged for s' then hide from what no impulse occurs.

Les explications qui viennent d'être données font comprendre que si la première alternance amène le balancier à tourner au-delà d'une amplitude normale qui est de l'ordre de 320 degrés, par exemple à la suite d'un choc appliqué à la montre, le premier doigt du bloqueur peut être actionné une seconde fois. Il se produit alors une seconde impulsion pendant la même alternance, ce qui entraîne l'échappement à galoper. On comprendra aussi que si la seconde alternance amène le balancier à tourner au delà de son amplitude normale de fonctionnement, le second doigt porté par le plateau peut s'escamoter une seconde fois en suite de quoi, par changement de sens de rotation du plateau, ledit second doigt provoque le dégagement de la palette de repos, puis une impulsion non désirée, faussant ainsi l'isochronisme de l'oscillateur.The explanations that have just been given make it clear that if the first alternation causes the balance to rotate beyond a normal amplitude which is of the order of 320 degrees, for example following a shock applied to the shows, the first finger of the blocker can be operated a second time. There is then a second pulse during the same alternation, which causes the escapement to gallop. It will also be understood that if the second alternation causes the balance to rotate beyond its normal range of operation, the second finger carried by the plate can retract a second time following which, by changing the direction of rotation of the plate, said second finger causes the release of the pallet of rest, then an unwanted pulse, thus distorting the isochronism of the oscillator.

Pour empêcher l'extension angulaire du balancier et éviter ainsi les inconvénients cités au paragraphe ci-dessus, la présente invention est remarquable en ce que, et comme le font voir toutes les figures annexées, l'arbre 2 dont est équipé le balancier 1 est muni d'un pignon 3 engrenant avec des moyens 4 empêchant ledit balancier 1 de tourner au delà d'un angle normal de rotation et cela quel que soit le sens de cette rotation.To prevent the angular extension of the balance and thus avoid the disadvantages mentioned in the paragraph above, the present invention is remarkable in that, and as shown in all the accompanying figures, the shaft 2 which is equipped with the balance 1 is equipped with a gear 3 meshing with means 4 preventing said balance 1 to rotate beyond a normal rotation angle and this whatever the direction of this rotation.

Les figures 1 et 2 montrent une première forme d'exécution de l'invention. Ici les moyens 4 empêchant le balancier 1 de tourner au-delà d'un angle normal de rotation consistent en une roue dentée 5 engrenant avec le pignon 3 porté par l'arbre 2 du balancier 1. Cette roue 5 porte au moins deux rayons 6 et 7 susceptibles de venir buter contre un arrêt fixe 8 si le balancier 1 est entraîné au delà de son angle normal de rotation. La figure 2 montre plus précisément que l'arrêt fixe 8 est une goupille 13 chassée dans la platine 15 que comporte la pièce d'horlogerie.The Figures 1 and 2 show a first embodiment of the invention. Here the means 4 preventing the rocker 1 from rotating beyond a normal angle of rotation consist of a gear 5 meshing with the pinion 3 carried by the shaft 2 of the rocker 1. This wheel 5 carries at least two spokes 6 and 7 likely to abut against a fixed stop 8 if the rocker 1 is driven beyond its normal angle of rotation. The figure 2 shows more precisely that the fixed stop 8 is a pin 13 driven into the plate 15 that includes the timepiece.

Les figures 3 et 4 montrent une seconde forme d'exécution de l'invention. Ici les moyens 4 empêchant le balancier 1 de tourner au-delà d'un angle normal de rotation consistent en un secteur denté pivotant formant un râteau 9. Ce râteau 9 porte deux rayons terminaux 10 et 11 susceptibles de venir buter contre un arrêt fixe 8 si le balancier est entraîné au-delà de son angle normal de rotation. La figure 4 montre plus précisément que l'arrêt fixe 8 est une goupille 14 vissée dans la platine 15 que comporte la pièce d'horlogerie.The Figures 3 and 4 show a second embodiment of the invention. Here the means 4 preventing the balance 1 from turning beyond a normal angle of rotation consist of a pivoted toothed sector forming a rake 9. This rake 9 carries two terminal rays 10 and 11 may abut against a fixed stop 8 if the pendulum is driven beyond its normal angle of rotation. The figure 4 shows more precisely that the fixed stop 8 is a pin 14 screwed into the plate 15 that includes the timepiece.

On voit que pour les deux formes d'exécution, les rayons 6 et 7 de la roue 5 et les rayons terminaux 10 et 11 du râteau 9 empêchent le balancier 1 de tourner au delà de son angle normal de fonctionnement, quel que soit son sens de rotation, ce qui présente un avantage par rapport au système proposé plus haut par Alois Irk où cette limitation n'a lieu que dans un sens de rotation du balancier. On observera aussi que la présente invention fait appel à une liaison mécanique que l'on pourrait appeler rigide entre le balancier et les moyens de limitation de sa course puisqu'il fait appel à une liaison par engrenages sans aucun élément élastique comme proposé par Alois Irk.It can be seen that for the two embodiments, the spokes 6 and 7 of the wheel 5 and the terminal radii 10 and 11 of the rake 9 prevent the balance 1 from turning beyond its normal operating angle, whatever its meaning. rotation, which has an advantage over the system proposed above by Alois Irk where this limitation occurs only in a direction of rotation of the balance. It will also be observed that the present invention uses a mechanical connection that could be called rigid between the balance and the means of limiting its stroke since it uses a gear connection without any elastic element as proposed by Alois Irk .

Les deux formes d'exécution prises en exemple montrent que le pignon 3 du balancier 1 comporte neuf ailes. La roue 5 de la figure 1 ainsi que le râteau 9 de la figure 3 (si on le rapporte à une roue complète) comprennent chacun trente-huit dents d'où un rapport d'engrenage de 9/38 = 0.24. Or on a indiqué plus haut que l'amplitude normale du balancier est de l'ordre de 320 degrés, ce qui conduit le râteau 9 de la figure 3 à tourner d'un angle de 320 x 0.24 = 76.8 degrés. Comme le montre la figure 3, en limitant la rotation du râteau à un angle ∝ =80°, d'une part on est assuré du bon fonctionnement de l'échappement et d'autre part on va empêcher toute velléité de galop. Cette limitation a lieu quand le rayon terminal 11 bute contre la goupille 14. Il en va de même pour l'autre sens de rotation du balancier où le rayon terminal 10 rencontre la goupille 14 et pour lequel on trouve le même angle de 80°, mais qui n'a pas été représenté en dessin.Both exemplary embodiments show that the pinion 3 of the balance 1 has nine wings. Wheel 5 of the figure 1 as well as the rake 9 of the figure 3 (if reported to a complete wheel) each include thirty-eight teeth from which a gear ratio of 9/38 = 0.24. Now it has been indicated above that the normal amplitude of the balance is of the order of 320 degrees, which leads the rake 9 of the figure 3 to rotate at an angle of 320 x 0.24 = 76.8 degrees. As shown in figure 3 , limiting the rotation of the rake at an angle α = 80 °, firstly we are assured of the proper operation of the exhaust and secondly we will prevent any galloping. This limitation occurs when the terminal radius 11 abuts against the pin 14. The same applies to the other direction of rotation of the balance where the terminal radius 10 meets the pin 14 and for which we find the same angle of 80 °, but which has not been represented in drawing.

Comme la roue 5, ou le râteau 9, est en prise permanente avec le pignon 3 du balancier sans cesse en mouvement, il est important de choisir pour ces éléments des matériaux présentant un coefficient de frottement très bas. L'expérience a montré de bons résultats si le pignon 3 est en acier et si la roue 5, ou le râteau 9, est en laiton.As the wheel 5, or the rake 9, is in permanent engagement with the pinion 3 of the ever-moving balance, it is important to choose for these elements materials having a very low coefficient of friction. The experiment has shown good results if the pinion 3 is steel and if the wheel 5, or the rake 9, is brass.

Des deux modes d'exécution qui viennent d'être présentés, on accordera une légère préférence à celle mettant en oeuvre le râteau 9. En effet cet élément est plus léger qu'une roue entière. Se pose cependant le problème d'équilibrage du râteau 9. La figure 3 montre qu'on a fait usage d'un contre poids 16 opposé à la denture du râteau et placé le plus près possible du centre de rotation pour abaisser le moment d'inertie de tout l'ensemble.Of the two embodiments that have just been presented, a slight preference will be given to that using the rake 9. In fact this element is lighter than a whole wheel. However, there is the problem of balancing the rake 9. The figure 3 shows that we used a counterweight 16 opposite to the teeth of the rake and placed as close as possible to the center of rotation to lower the moment of inertia of the whole assembly.

Selon une variante de réalisation non représentée la roue dentée 5 peut ne porter qu'un rayon, dans ce cas, on adoptera bien entendu le rapport d'engrange entre cette roue et le pignon 3 pour que le bras vienne buter contre l'arrêt fixe 8 si le balancier est entraîné au delà de l'angle normal.According to a variant embodiment not shown, the toothed wheel 5 may only carry one spoke, in this case, of course, the gear ratio will be adopted between this wheel and the pinion 3 so that the arm abuts against the fixed stop. 8 if the pendulum is driven beyond the normal angle.

Claims (5)

  1. Anti-trip device for a timepiece escapement including a sprung balance (1) provided with an arbour (2), said device preventing the angular extension of said balance beyond a normal angle of rotation, characterized in that it includes a pinion (3) mounted on said arbour (2) and means (4) meshing with said pinion (3) and preventing said balance (1) from rotating beyond said normal angle of rotation whatever the direction of said rotation.
  2. Anti-trip device according to claim 1, characterized in that said means (4) consist of a toothed wheel (5) meshing with said pinion (3) and carrying at least one spoke (6, 7) able to abut against a fixed stop member (8) if the balance (1) is driven beyond said normal angle of rotation.
  3. Anti-trip device according to claim 1, characterized in that said means (4) consist of a pivoting toothed sector forming a rack (9) and carrying two end spokes (10, 11) able to abut against a fixed stop member (8) if the balance (1) is driven beyond said normal angle of rotation.
  4. Anti-trip device according to claim 2 or claim 3, characterized in that said fixed stop member (8) is a pin (13, 14) fixed in the plate (15) comprised in the timepiece.
  5. Anti-trip device according to claim 1, characterized in that the gear ratio between the pinion (3) and said means (4) driven by said pinion is of the order of 0.24.
EP05112521A 2005-12-20 2005-12-20 Anti-tripping device for timepiece escapement Active EP1801668B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE602005005209T DE602005005209T2 (en) 2005-12-20 2005-12-20 Device for gallop protection for clock escapement
EP05112521A EP1801668B1 (en) 2005-12-20 2005-12-20 Anti-tripping device for timepiece escapement
AT05112521T ATE388428T1 (en) 2005-12-20 2005-12-20 DEVICE FOR CATERING PROTECTION FOR WATCH ESCULATION
SG200608687-0A SG133528A1 (en) 2005-12-20 2006-12-13 Anti-trip device for timepiece escapement
US11/610,961 US7527424B2 (en) 2005-12-20 2006-12-14 Anti-trip device for timepiece escapement
JP2006336611A JP4795218B2 (en) 2005-12-20 2006-12-14 Trip prevention device for watch movement
CN2006101687844A CN1987686B (en) 2005-12-20 2006-12-20 Anti-tripping device for timepiece escapement
HK07109651.4A HK1104621A1 (en) 2005-12-20 2007-09-05 Anti-trip device for timepiece escapement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05112521A EP1801668B1 (en) 2005-12-20 2005-12-20 Anti-tripping device for timepiece escapement

Publications (2)

Publication Number Publication Date
EP1801668A1 EP1801668A1 (en) 2007-06-27
EP1801668B1 true EP1801668B1 (en) 2008-03-05

Family

ID=37116146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05112521A Active EP1801668B1 (en) 2005-12-20 2005-12-20 Anti-tripping device for timepiece escapement

Country Status (8)

Country Link
US (1) US7527424B2 (en)
EP (1) EP1801668B1 (en)
JP (1) JP4795218B2 (en)
CN (1) CN1987686B (en)
AT (1) ATE388428T1 (en)
DE (1) DE602005005209T2 (en)
HK (1) HK1104621A1 (en)
SG (1) SG133528A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2690506A1 (en) 2012-07-25 2014-01-29 Nivarox-FAR S.A. Anti-tripping clock hairspring
WO2014072317A2 (en) 2012-11-09 2014-05-15 Nivarox-Far S.A. Method for the production of a multistable flexible element

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2450757B1 (en) 2010-11-04 2014-10-15 Nivarox-FAR S.A. Anti-tripping device for escapement mechanism
EP2450756B1 (en) * 2010-11-04 2015-01-07 Nivarox-FAR S.A. Anti-tripping device for escapement mechanism
CH704051B1 (en) 2010-11-04 2013-10-15 Nivarox Sa Exhaust for synchronous clockwork.
JP5953628B2 (en) * 2012-02-17 2016-07-20 セイコーインスツル株式会社 Escapement machine and mechanical watch
EP3147725B1 (en) * 2015-09-28 2018-04-04 Nivarox-FAR S.A. Oscillator with rotary detent

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Publication number Priority date Publication date Assignee Title
US710823A (en) * 1901-12-04 1902-10-07 Frederick Hermann Voigt Escapement for timepieces.
CH28540A (en) * 1903-07-17 1904-05-15 Maurice Woog Further development of the detent escapement of watches
US867015A (en) * 1906-10-15 1907-09-24 Henri Coullery Escapement mechanism for timepieces.
US2591876A (en) * 1949-07-01 1952-04-08 Ebauches Sa Dead-second watch mechanism
US3041819A (en) * 1952-04-15 1962-07-03 Elgin Nat Watch Co Oscillating balance with hairspring and expansion limiting means
US2806344A (en) * 1956-05-17 1957-09-17 Hamilton Watch Co Overbanking preventive means
FR1274665A (en) * 1960-09-17 1961-10-27 Lip Sa Method of adjusting a watch escapement or the like and escapement for its implementation
EP1143307A4 (en) * 1999-11-11 2005-07-27 Seiko Instr Inc Mechanical timepiece with timed annular balance rotating angle control mechanism
JP3804563B2 (en) * 2002-03-26 2006-08-02 セイコーエプソン株式会社 Mainspring device and watch equipped with the mainspring device
ATE487963T1 (en) 2003-12-04 2010-11-15 Montres Breguet Sa CHRONOMETER ESCAPEMENT FOR WATCHES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2690506A1 (en) 2012-07-25 2014-01-29 Nivarox-FAR S.A. Anti-tripping clock hairspring
WO2014072317A2 (en) 2012-11-09 2014-05-15 Nivarox-Far S.A. Method for the production of a multistable flexible element

Also Published As

Publication number Publication date
JP2007171176A (en) 2007-07-05
JP4795218B2 (en) 2011-10-19
US7527424B2 (en) 2009-05-05
ATE388428T1 (en) 2008-03-15
CN1987686B (en) 2010-04-21
DE602005005209T2 (en) 2009-03-26
SG133528A1 (en) 2007-07-30
HK1104621A1 (en) 2008-01-18
US20070140066A1 (en) 2007-06-21
CN1987686A (en) 2007-06-27
EP1801668A1 (en) 2007-06-27
DE602005005209D1 (en) 2008-04-17

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