EP1538491B1 - Detent escapement for watches - Google Patents

Detent escapement for watches Download PDF

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Publication number
EP1538491B1
EP1538491B1 EP03027929A EP03027929A EP1538491B1 EP 1538491 B1 EP1538491 B1 EP 1538491B1 EP 03027929 A EP03027929 A EP 03027929A EP 03027929 A EP03027929 A EP 03027929A EP 1538491 B1 EP1538491 B1 EP 1538491B1
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EP
European Patent Office
Prior art keywords
pallet
escapement
finger
roller
stone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03027929A
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German (de)
French (fr)
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EP1538491A1 (en
Inventor
Nicolas Georges Hayek
Thierry Conus
Jurin Andrés Cabezas
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
Original Assignee
Montres Breguet 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 Montres Breguet SA filed Critical Montres Breguet SA
Priority to AT03027929T priority Critical patent/ATE487963T1/en
Priority to DE60334916T priority patent/DE60334916D1/en
Priority to EP03027929A priority patent/EP1538491B1/en
Priority to SG200407226A priority patent/SG112956A1/en
Priority to US11/000,404 priority patent/US7040803B2/en
Priority to CNB2004100969416A priority patent/CN100547502C/en
Priority to JP2004352953A priority patent/JP4708775B2/en
Publication of EP1538491A1 publication Critical patent/EP1538491A1/en
Priority to HK05106167.9A priority patent/HK1073699A1/en
Application granted granted Critical
Publication of EP1538491B1 publication Critical patent/EP1538491B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements

Definitions

  • the present invention relates to a detent escapement for a timepiece comprising an escape wheel, a rocker on the axis of which is fixed a large plate equipped with a pulse pallet and a first finger of actuation, a blocker in the form of rocker hinged on an axis, this blocker carrying a pallet rest, a second actuating finger and a probe terminated by a spout, said escapement further comprising an elastic member acting on one of the fingers of actuating to drive the other finger and actuate the blocker when the plate rotates in a first direction and to bypass the other finger without driving it when the plate rotates in a second direction opposite to the first, the axis of the balance carrying in addition a small plateau in the circular periphery of which is made a notch into which penetrates the nozzle of the probe when the pallet of rest emerges from the escape wheel.
  • the axis 40 of the balance carries a large plate 41, a first small plate 42 carrying a notch 43 and a second plate 44 carrying an actuating finger 45.
  • the trigger-rocker 46 is pivoted on an axis 47. It carries a pallet 48, a pin 49, a spout 50 and a leaf spring 51. The trigger-rocker 46 is brought to rest by a spiral rest spring 53.
  • the nose 50 penetrates into the notch 43 at the same time as the escape wheel 52 advances by one step.
  • the spout 50 is clear of the notch 43 and is close to the circular periphery 54 of the first small plate 42 in the position illustrated in the figure.
  • This arrangement has the advantage of preventing a tooth of the wheel 52 from leaving the pallet rest 48 when the timepiece receives a shock.
  • the spout 50 briefly presses against the circular periphery 54 of the first small plate 42 which stops the trigger-rocker 46 which is immediately brought to rest by the return spring spiral 53.
  • the expansion escapement of the present invention in addition to meeting the definition of the first paragraph of this description, is remarkable, as defined by claim 1, in that the return of the pallet to the position of rest is caused by a rising edge of said notch arranged in such a way that said spout climbs said flank when the small plate rotates in said first direction.
  • the figures 2 , 3 and 4 illustrate the escapement relaxation object of the present invention.
  • the exhaust comprises an escape wheel 2 provided with teeth 3. Without this being shown, the escape wheel is driven by the wheel of the watch which receives its driving force from the barrel.
  • the figures show a large plate 4 mounted on the axis 16 of a beam (not shown).
  • the large plate 4 is equipped with a first actuating finger 14 and a pallet 5 receiving pulses by the teeth 3 of the wheel 2.
  • the system also shows a blocker 6 in the form of a rocker articulated on an axis 8.
  • the blocker 6 carries a rest pallet 7, a second actuating finger 11 and a probe 20 terminated by a spout 21.
  • the rest pallet cooperates with the teeth 3 of the wheel 2.
  • the escapement further comprises an element spring 12 acting on one of the actuating fingers - in the case of Figures 2 to 4 on the finger 14 - to drive the other finger - in this case the finger 11 - and operate the blocker 6 when the plate 4 rotates in a first direction and to bypass the other finger - here the finger 11 - without the lead when the plate rotates in a second direction b opposite the first.
  • FIGS. 2 to 4 show further that the axis 16 of the balance carries a small plate 23 in the circular periphery 24 which is formed a notch 22. As will be shown later, the nozzle 21 of the sensor 20 enters the notch 22 when the pallet of rest 7 emerges teeth 3 of the escape wheel 2.
  • Figures 2 to 4 show that the blocker 6 comprises a first branch 9 which carries the rest pallet 7 and a second leg 10 which carries the second actuating finger and the probe 20 terminated by the spout 21. More precisely also, these same figures suggest that the elastic member 12 acts on the first actuating finger 14. In this the construction illustrated in FIGS. Figures 2 to 4 differs from that shown in figure 1 representing the prior art.
  • the prior art also provides a small plate cooperating with a feeler to make the escapement resistant to shocks exerted on the timepiece, but does not save a spiral spring reducing the blocker in the rest position. It is the object of the present invention to provide a construction that does without any return spring by taking advantage of the rotation of the plate to perform this recall.
  • the escapement of the present invention is remarkable in that the return of the pallet 7 in the rest position is caused by a rising edge 25 of the notch 22 formed in the periphery 24 of the small plate 23, this flank being inclined such that the spout 21 terminating the probe 20 escalates said flank 25 when the small plate rotates in the first direction a.
  • the described embodiment shows an elastic member 12 located between the large and small plates 4 and 23.
  • This organ will not be described here in detail because it can be in various forms, its essential role being to act on the first finger 14 to drive the second finger 11 in a direction of rotation has trays and to retract or circumvent this finger 11 in the opposite direction of rotation b.
  • the elastic member could be arranged on the blocker 6 and act on the finger 11 of said blocker. At this moment the finger 14 would be a finger implanted fixedly on the plate 4.
  • the invention could be applied to the escapement described above in the prior art, provided that the first small plate 42 has a notch 43 with a properly inclined flank, which would make it possible to dispense with the spiral return spring 53. (see figure 1 ).
  • the plate 4 rotates in the direction of the arrow a.
  • the second finger 14 on which acts the elastic member 12 comes into contact with the first finger 11 of the blocker 6.
  • the pallet of rest 7 of the blocker 6 is fully engaged in the tooth 60 of the escape wheel 2 which is blocked .
  • the nozzle 21 of the probe 20 is at the inlet of the notch 22.
  • the plate 4 continues its course in the direction of the arrow a.
  • the second finger 14 drives the first finger 11 of the blocker 6 and tilts the latter in the direction of the arrow c, bringing the pallet rest 7 to the limit of the clearance of the tooth 60.
  • the spout 21 sinks into the notch 22.
  • the end of the impulse is presented in figure 9 .
  • the tooth 61 is about to leave the pallet 5.
  • the small plate 23 has been driven by the tooth 61 in the direction of the arrow a, which caused the forced climbing of the spout 21 on the flank 25 and forced the pallet rest 7 to be introduced into the space between the teeth 60 and 62, the blocker 6 then rotating in the direction of the arrow f.
  • the tooth 62 has come into contact with the pallet rest 7.
  • the kinetic energy of the wheel 2 is then exerted on the pallet 7 by the tooth 62 which forces the pallet 7 to stop at the bottom of the tooth 62 and the blocker 6 to abut against a locking pin 63 as shown in FIG. figure 11 .
  • This is a safety device for holding the jammer while the rocker exerts its additional oscillation arc, a device called a pull which opposes a resistance to the release of the pallet 7 during shocks applied to the timepiece .
  • the draft is generally defined by an angle ⁇ formed by the rest plane 70 of the pallet 7 and a perpendicular 71 raised on a radius 72 of the blocker, at the point of contact 73 of the tooth 60 and the pallet 7 (see FIG. figure 2 ).
  • the figure 11 shows again that the spout 21 of the probe 20 is out of the notch 22. It can be seen that in this situation the spout 21 which terminates the probe 20 is arranged to be stationary close to the circular periphery 24 of the small plate 23 but without touching it. latest. The trays 4 and 23 are therefore completely free to go through their additional oscillation, alternating in the direction of the arrow and then alternating in the opposite direction, after which a cycle starts again with the situation presented in FIG. figure 5 .
  • the notch 22 has a V-shaped opening.
  • the inlet or descending flank 80 must be shaped so as not to impede the introduction of the spout 21 when the pallet of rest 7 disengages from the spur wheel. exhaust 2.
  • exit flank or upright 25 must be shaped so as to be sure that at the end of the impulse function, the rest pallet 7 is on the trajectory of a tooth of the escape wheel in order to intercept and stop it.

Abstract

The escapement has a jaw (21) that is inserted in a notch (22), when a stable pallet (7) of a blocker (6) disengages from teeth (3) of an escape wheel. The return of the pallet in a rest position is caused by a raising flank (25) of the notch. The flank is inclined in a manner that the jaw is forced to follow and to ascend the flank when a small plate (23) rotates.

Description

La présente invention est relative à un échappement à détente pour pièce d'horlogerie comprenant une roue d'échappement, un balancier sur l'axe duquel est fixé un grand plateau équipé d'une palette d'impulsion et d'un premier doigt d'actionnement, un bloqueur en forme de bascule articulée sur un axe, ce bloqueur portant une palette de repos, un second doigt d'actionnement et un palpeur terminé par un bec, ledit échappement comprenant encore un organe élastique agissant sur l'un des doigts d'actionnement pour entraîner l'autre doigt et actionner le bloqueur quand le plateau tourne dans un premier sens et pour contourner ledit autre doigt sans l'entraîner quand le plateau tourne dans un second sens opposé au premier, l'axe du balancier portant en outre un petit plateau dans le pourtour circulaire duquel est pratiquée une entaille dans laquelle pénètre le bec du palpeur quand la palette de repos se dégage de la roue d'échappement.The present invention relates to a detent escapement for a timepiece comprising an escape wheel, a rocker on the axis of which is fixed a large plate equipped with a pulse pallet and a first finger of actuation, a blocker in the form of rocker hinged on an axis, this blocker carrying a pallet rest, a second actuating finger and a probe terminated by a spout, said escapement further comprising an elastic member acting on one of the fingers of actuating to drive the other finger and actuate the blocker when the plate rotates in a first direction and to bypass the other finger without driving it when the plate rotates in a second direction opposite to the first, the axis of the balance carrying in addition a small plateau in the circular periphery of which is made a notch into which penetrates the nozzle of the probe when the pallet of rest emerges from the escape wheel.

Un échappement à détente répondant à la description ci-dessus a déjà été proposé et décrit dans l'ancien brevet suisse CH-3299 dû à Emile James . La figure 1 de la présente description illustre l'arrangement proposé qui montre une détente-bascule pivotée à l'une de ses extrémités selon une construction classique de ce genre d'échappement.A detent escapement as described above has already been proposed and described in the old Swiss patent CH-3299 due to Emile James. The figure 1 DESCRIPTION OF THE PREFERRED EMBODIMENT This invention illustrates the proposed arrangement which shows a rocker arm pivoted at one of its ends according to a conventional construction of this type of escapement.

L'axe 40 du balancier porte un grand plateau 41, un premier petit plateau 42 portant une entaille 43 et un second plateau 44 portant un doigt d'actionnement 45. La détente-bascule 46 est pivotée sur un axe 47. Elle porte une palette de repos 48, une goupille 49, un bec 50 et un ressort-lame 51. La détente-bascule 46 est ramenée au repos par un ressort spiral de repos 53.The axis 40 of the balance carries a large plate 41, a first small plate 42 carrying a notch 43 and a second plate 44 carrying an actuating finger 45. The trigger-rocker 46 is pivoted on an axis 47. It carries a pallet 48, a pin 49, a spout 50 and a leaf spring 51. The trigger-rocker 46 is brought to rest by a spiral rest spring 53.

Au moment où le doigt d'actionnement 45 soulève la détente-bascule 46 à l'aide du ressort-lame 51, le bec 50 pénètre dans l'entaille 43 en même temps que la roue d'échappement 52 avance d'un pas. Pendant l'arc supplémentaire le bec 50 est dégagé de l'entaille 43 et se trouve à proximité du pourtour circulaire 54 du premier petit plateau 42 dans la position illustrée sur la figure.At the moment when the actuating finger 45 lifts the rocker trigger 46 by means of the leaf spring 51, the nose 50 penetrates into the notch 43 at the same time as the escape wheel 52 advances by one step. During the additional arc the spout 50 is clear of the notch 43 and is close to the circular periphery 54 of the first small plate 42 in the position illustrated in the figure.

Cette disposition a l'avantage d'empêcher qu'une dent de la roue 52 ne quitte la palette de repos 48 lorsque la pièce d'horlogerie reçoit un choc. A ce moment en effet, le bec 50 vient appuyer un court instant contre le pourtour circulaire 54 du premier petit plateau 42 ce qui arrête la détente-bascule 46 qui est tout de suite ramenée au repos par le ressort spiral de rappel 53.This arrangement has the advantage of preventing a tooth of the wheel 52 from leaving the pallet rest 48 when the timepiece receives a shock. At this moment, the spout 50 briefly presses against the circular periphery 54 of the first small plate 42 which stops the trigger-rocker 46 which is immediately brought to rest by the return spring spiral 53.

Cette même description met le doigt sur une faiblesse affectant l'échappement à détente, à savoir celle d'être sensible aux chocs aussi cet échappement est-il réservé surtout aux chronomètres de marine peu sollicités mécaniquement, cet échappement ayant la réputation de ne pas bien convenir aux montres-bracelet.This same description puts one finger on a weakness affecting the detent escapement, namely that of being sensitive to shocks also this exhaust is it reserved especially for marine chronometers not mechanically stressed, this exhaust having the reputation of not being well suited to the wristwatches.

Si l'on revient au brevet suisse cité, on remarque cependant que l'extraction du bec 50 hors de l'entaille 43 n'est possible que grâce au ressort spiral 53 qui exerce un effort de rappel sur la détente-bascule 46. Sur la figure de l'art antérieur on observe que l'entaille 43 porte des flancs abrupts, quasi radiaux empêchant toute sortie du bec qui serait provoquée par la seule rotation du plateau lui-même.If we return to the Swiss patent cited, however, we note that the extraction of the nose 50 out of the notch 43 is only possible thanks to the spiral spring 53 which exerts a restoring force on the trigger-rocker 46. the figure of the prior art it is observed that the notch 43 has steep, almost radial flanks preventing any output of the nozzle that would be caused by the single rotation of the plate itself.

On pourrait ainsi faire l'économie du ressort de rappel si l'on conformait l'entaille et le bec qui vient s'y introduire de telle façon que le rappel de la détente soit provoqué par la rotation même du plateau. C'est le but que se propose d'atteindre la présente invention.One could thus save the return spring if one conformed the notch and the beak which is introduced in such a way that the recall of the trigger is caused by the same rotation of the plate. This is the aim of the present invention.

Ainsi l'échappement à détente de la présente invention, en plus qu'il répond à la définition du premier paragraphe de cette description, est-il remarquable, comme défini par la revendication 1, en ce que le retour de la palette en position de repos est provoqué par un flanc montant de ladite entaille arrangé de telle façon que ledit bec escalade ledit flanc quand le petit plateau tourne dans ledit premier sens.Thus, the expansion escapement of the present invention, in addition to meeting the definition of the first paragraph of this description, is remarkable, as defined by claim 1, in that the return of the pallet to the position of rest is caused by a rising edge of said notch arranged in such a way that said spout climbs said flank when the small plate rotates in said first direction.

L'invention va être expliquée maintenant en détail ci-dessous par un mode d'exécution donné à titre d'exemple, cette exécution étant illustrée par les dessins annexés dans lesquels :

  • la figure 1 montre un échappement à détente de l'art antérieur discuté dans le préambule de cette description,
  • la figure 2 est une vue en plan d'un mode d'exécution de l'échappement selon l'invention,
  • la figure 3 est une vue en perspective de l'échappement montré en figure 2,
  • la figure 4 est un agrandissement de la zone IV de la figure 3,
  • les figures 5 à 11 sont des vues en plan explicitant plusieurs phases de fonctionnement de l'échappement selon l'invention.
The invention will now be explained in detail below by an embodiment given by way of example, this embodiment being illustrated by the appended drawings in which:
  • the figure 1 shows a detent escapement of the prior art discussed in the preamble of this description,
  • the figure 2 is a plan view of an embodiment of the exhaust according to the invention,
  • the figure 3 is a perspective view of the exhaust shown in figure 2 ,
  • the figure 4 is an enlargement of the IV zone of the figure 3 ,
  • the Figures 5 to 11 are plan views explaining several operating phases of the exhaust according to the invention.

Les figures 2, 3 et 4, illustrent l'échappement à détente objet de la présente invention. L'échappement comprend une roue d'échappement 2 munie de dents 3. Sans que cela soit représenté, la roue d'échappement est entraînée par le rouage de la montre qui reçoit sa force motrice du barillet. Les figures montrent un grand plateau 4 monté sur l'axe 16 d'un balancier (non représenté). Le grand plateau 4 est équipé d'un premier doigt d'actionnement 14 et d'une palette 5 recevant des impulsions par les dents 3 de la roue 2. Le système montre encore un bloqueur 6 en forme de bascule articulée sur un axe 8. Le bloqueur 6 porte une palette de repos 7, un second doigt d'actionnement 11 et un palpeur 20 terminé par un bec 21. La palette de repos coopère avec les dents 3 de la roue 2. L'échappement comprend encore un organe élastique 12 agissant sur l'un des doigts d'actionnement ― dans le cas des figures 2 à 4 sur le doigt 14 - pour entraîner l'autre doigt - en l'occurrence le doigt 11 - et actionner le bloqueur 6 quand le plateau 4 tourne dans un premier sens a et pour contourner ledit autre doigt ― ici le doigt 11 - sans l'entraîner quand le plateau tourne dans un second sens b opposé au premier.The figures 2 , 3 and 4 , illustrate the escapement relaxation object of the present invention. The exhaust comprises an escape wheel 2 provided with teeth 3. Without this being shown, the escape wheel is driven by the wheel of the watch which receives its driving force from the barrel. The figures show a large plate 4 mounted on the axis 16 of a beam (not shown). The large plate 4 is equipped with a first actuating finger 14 and a pallet 5 receiving pulses by the teeth 3 of the wheel 2. The system also shows a blocker 6 in the form of a rocker articulated on an axis 8. The blocker 6 carries a rest pallet 7, a second actuating finger 11 and a probe 20 terminated by a spout 21. The rest pallet cooperates with the teeth 3 of the wheel 2. The escapement further comprises an element spring 12 acting on one of the actuating fingers - in the case of Figures 2 to 4 on the finger 14 - to drive the other finger - in this case the finger 11 - and operate the blocker 6 when the plate 4 rotates in a first direction and to bypass the other finger - here the finger 11 - without the lead when the plate rotates in a second direction b opposite the first.

On trouve donc là le principe de tout échappement à détente dans lequel l'impulsion au balancier n'est donnée qu'une fois par oscillation pendant laquelle la roue d'échappement tourne d'un pas angulaire tandis que, dans l'échappement à ancre, ladite roue avance d'un demi-pas à chaque alternance. On mesure ici un des avantages apporté par l'échappement à détente puisque l'énergie perdue par suite de l'inertie de la roue d'échappement n'intervient qu'une fois par oscillation au lieu d'une fois par alternance.We thus find there the principle of any escapement with expansion in which the impulse with the balance is given only once by oscillation during which the escape wheel turns of an angular step whereas, in the escapement with anchor said wheel advances by half a step at each alternation. Here, one of the advantages of the detent escapement is measured since the energy lost as a result of the inertia of the escape wheel only occurs once per oscillation instead of once alternately.

Les figures 2 à 4 montrent en outre que l'axe 16 du balancier porte un petit plateau 23 dans le pourtour circulaire 24 duquel est pratiquée une entaille 22. Comme cela sera montré plus loin, le bec 21 du palpeur 20 pénètre dans l'entaille 22 quand la palette de repos 7 se dégage des dents 3 de la roue d'échappement 2.The Figures 2 to 4 show further that the axis 16 of the balance carries a small plate 23 in the circular periphery 24 which is formed a notch 22. As will be shown later, the nozzle 21 of the sensor 20 enters the notch 22 when the pallet of rest 7 emerges teeth 3 of the escape wheel 2.

Plus précisément les figures 2 à 4 montrent que le bloqueur 6 comporte une première branche 9 qui porte la palette de repos 7 et une seconde branche 10 qui porte le second doigt d'actionnement et le palpeur 20 terminé par le bec21. Plus précisément aussi, ces mêmes figures suggèrent que l'organe élastique 12 agit sur le premier doigt d'actionnement 14. En cela la construction illustrée aux figures 2 à 4 diffère de celle montrée en figure 1 représentant l'art antérieur.More specifically, Figures 2 to 4 show that the blocker 6 comprises a first branch 9 which carries the rest pallet 7 and a second leg 10 which carries the second actuating finger and the probe 20 terminated by the spout 21. More precisely also, these same figures suggest that the elastic member 12 acts on the first actuating finger 14. In this the construction illustrated in FIGS. Figures 2 to 4 differs from that shown in figure 1 representing the prior art.

Comme cela a été dit plus haut, l'art antérieur prévoit aussi un petit plateau coopérant avec un palpeur pour rendre l'échappement résistant aux chocs exercés sur la pièce d'horlogerie, mais ne fait pas l'économie d'un ressort spiral ramenant le bloqueur en position de repos. C'est le but de la présente invention de proposer une construction qui se passe de tout ressort de rappel en mettant à profit la rotation du plateau pour effectuer ce rappel. Dans cette perspective, l'échappement de la présente invention est remarquable en ce que le retour de la palette 7 en position de repos est provoqué par un flanc montant 25 de l'entaille 22 pratiquée dans le pourtour 24 du petit plateau 23, ce flanc étant incliné de telle façon que le bec 21 terminant le palpeur 20 escalade ledit flanc 25 quand le petit plateau tourne dans le premier sens a.As has been said above, the prior art also provides a small plate cooperating with a feeler to make the escapement resistant to shocks exerted on the timepiece, but does not save a spiral spring reducing the blocker in the rest position. It is the object of the present invention to provide a construction that does without any return spring by taking advantage of the rotation of the plate to perform this recall. In this perspective, the escapement of the present invention is remarkable in that the return of the pallet 7 in the rest position is caused by a rising edge 25 of the notch 22 formed in the periphery 24 of the small plate 23, this flank being inclined such that the spout 21 terminating the probe 20 escalates said flank 25 when the small plate rotates in the first direction a.

Le mode d'exécution décrit montre un organe élastique 12 situé entre les grand et petit plateaux 4 et 23. Cet organe ne sera pas décrit ici en détail car il peut se présenter sous différentes formes, son rôle essentiel étant d'agir sur le premier doigt 14 pour entraîner le second doigt 11 dans un sens de rotation a des plateaux et pour s'escamoter ou contourner ce doigt 11 dans le sens de rotation opposé b. On observera ici que l'organe élastique pourrait être disposé sur le bloqueur 6 et agir sur le doigt 11 dudit bloqueur. A ce moment le doigt 14 serait un doigt implanté fixement sur le plateau 4.The described embodiment shows an elastic member 12 located between the large and small plates 4 and 23. This organ will not be described here in detail because it can be in various forms, its essential role being to act on the first finger 14 to drive the second finger 11 in a direction of rotation has trays and to retract or circumvent this finger 11 in the opposite direction of rotation b. It will be observed here that the elastic member could be arranged on the blocker 6 and act on the finger 11 of said blocker. At this moment the finger 14 would be a finger implanted fixedly on the plate 4.

Enfin l'invention pourrait être appliquée à l'échappement décrit plus haut dans l'art antérieur, à condition que le premier petit plateau 42 porte une entaille 43 à flanc correctement incliné, ce qui permettrait de se passer du ressort spiral de rappel 53. (voir figure 1).Finally, the invention could be applied to the escapement described above in the prior art, provided that the first small plate 42 has a notch 43 with a properly inclined flank, which would make it possible to dispense with the spiral return spring 53. (see figure 1 ).

On va décrire maintenant en détail le fonctionnement de l'échappement à détente en s'aidant des figures 5 à 11 qui illustrent différentes phases de ce fonctionnement.We will now describe in detail the operation of the detent escapement with the help of Figures 5 to 11 which illustrate different phases of this operation.

En figure 5, le plateau 4 tourne dans le sens de la flèche a. Le second doigt 14 sur lequel agit l'organe élastique 12 entre en contact avec le premier doigt 11 du bloqueur 6. La palette de repos 7 du bloqueur 6 est engagée à fond dans la dent 60 de la roue d'échappement 2 qui est bloquée. Le bec 21 du palpeur 20 se présente à l'entrée de l'entaille 22.In figure 5 , the plate 4 rotates in the direction of the arrow a. The second finger 14 on which acts the elastic member 12 comes into contact with the first finger 11 of the blocker 6. The pallet of rest 7 of the blocker 6 is fully engaged in the tooth 60 of the escape wheel 2 which is blocked . The nozzle 21 of the probe 20 is at the inlet of the notch 22.

En figure 6, le plateau 4 continue sa course dans le sens de la flèche a. Le second doigt 14 entraîne le premier doigt 11 du bloqueur 6 et fait basculer ce dernier dans le sens de la flèche c, amenant la palette de repos 7 à la limite du dégagement de la dent 60. Le bec 21 s'enfonce dans l'entaille 22.In figure 6 , the plate 4 continues its course in the direction of the arrow a. The second finger 14 drives the first finger 11 of the blocker 6 and tilts the latter in the direction of the arrow c, bringing the pallet rest 7 to the limit of the clearance of the tooth 60. The spout 21 sinks into the notch 22.

En figure 7, la roue d'échappement 2 est libre et tourne dans le sens de la flèche c. Sa dent 61 entre en contact avec la palette 5 du grand plateau 4, ce qui a pour effet de donner une nouvelle impulsion audit plateau qui tourne dans le sens de la flèche e avec le balancier qui lui est lié. Le second doigt 14 est sur le point de décrocher d'avec le premier doigt 11.In figure 7 , the escape wheel 2 is free and rotates in the direction of the arrow c. Its tooth 61 comes into contact with the pallet 5 of the large plate 4, which has the effect of giving a new impetus to said plate which rotates in the direction of the arrow e with the pendulum which is connected thereto. The second finger 14 is about to pick up with the first finger 11.

En figure 8, l'impulsion de la dent 61 sur la palette 5 est en cours ; le second doigt 14 a décroché d'avec le premier doigt 11 entraînant le bec 21 du palpeur au début du flanc 25 de l'entaille 22 pratiquée dans le petit plateau 23.In figure 8 the pulse of the tooth 61 on the pallet 5 is in progress; the second finger 14 has unhooked with the first finger 11 causing the nozzle 21 of the probe at the beginning of the flank 25 of the notch 22 formed in the small plate 23.

La fin de l'impulsion est présentée en figure 9. La dent 61 est sur le point de quitter la palette 5. Le petit plateau 23 a été entraîné par la dent 61 dans le sens de la flèche a, ce qui a provoqué l'escalade forcée du bec 21 sur le flanc 25 et obligé la palette de repos 7 à s'introduire dans l'espace séparant les dents 60 et 62, le bloqueur 6 tournant alors dans le sens de la flèche f.The end of the impulse is presented in figure 9 . The tooth 61 is about to leave the pallet 5. The small plate 23 has been driven by the tooth 61 in the direction of the arrow a, which caused the forced climbing of the spout 21 on the flank 25 and forced the pallet rest 7 to be introduced into the space between the teeth 60 and 62, the blocker 6 then rotating in the direction of the arrow f.

En figure 10, la dent 62 vient d'entrer en contact avec la palette de repos 7. L'énergie cinétique de la roue 2 s'exerce alors sur la palette 7 par la dent 62 ce qui oblige la palette 7 à s'arrêter au fond de la dent 62 et le bloqueur 6 à venir buter contre une goupille d'arrêt 63 comme le montre la figure 11. Dès cet instant le bloqueur 6 - plus précisément sa branche 10 - est maintenue contre la butée de limitation 63 avec une certaine force. Il s'agit là d'un dispositif de sûreté de maintien du bloqueur pendant que le balancier exerce son arc d'oscillation supplémentaire, dispositif appelé tirage qui oppose une résistance au dégagement de la palette 7 lors de chocs appliqués à la pièce d'horlogerie. Le tirage est généralement défini par un angle α formé par le plan de repos 70 de la palette 7 et une perpendiculaire 71 élevée sur un rayon 72 du bloqueur, au point de contact 73 de la dent 60 et de la palette 7 (voir figure 2).In figure 10 , the tooth 62 has come into contact with the pallet rest 7. The kinetic energy of the wheel 2 is then exerted on the pallet 7 by the tooth 62 which forces the pallet 7 to stop at the bottom of the tooth 62 and the blocker 6 to abut against a locking pin 63 as shown in FIG. figure 11 . From this moment on blocker 6 - more precisely its branch 10 - is held against the limit stop 63 with a certain force. This is a safety device for holding the jammer while the rocker exerts its additional oscillation arc, a device called a pull which opposes a resistance to the release of the pallet 7 during shocks applied to the timepiece . The draft is generally defined by an angle α formed by the rest plane 70 of the pallet 7 and a perpendicular 71 raised on a radius 72 of the blocker, at the point of contact 73 of the tooth 60 and the pallet 7 (see FIG. figure 2 ).

La figure 11 montre encore que le bec 21 du palpeur 20 est sorti de l'entaille 22. On voit que dans cette situation le bec 21 qui termine le palpeur 20 est arrangé pour être immobile à proximité du pourtour circulaire 24 du petit plateau 23 mais sans toucher ce dernier. Les plateaux 4 et 23 sont dès lors totalement libres de parcourir leur oscillation supplémentaire, soit une alternance dans le sens de la flèche a puis une alternance dans le sens opposé après quoi un cycle recommence avec la situation présentée en figure 5.The figure 11 shows again that the spout 21 of the probe 20 is out of the notch 22. It can be seen that in this situation the spout 21 which terminates the probe 20 is arranged to be stationary close to the circular periphery 24 of the small plate 23 but without touching it. latest. The trays 4 and 23 are therefore completely free to go through their additional oscillation, alternating in the direction of the arrow and then alternating in the opposite direction, after which a cycle starts again with the situation presented in FIG. figure 5 .

On remarquera pour finir que l'entaille 22 présente une ouverture en forme de V. Le flanc d'entrée ou descendant 80 devra être conformé pour ne pas gêner l'introduction du bec 21 quand la palette de repos 7se dégage de la roue d'échappement 2.Finally, it will be noted that the notch 22 has a V-shaped opening. The inlet or descending flank 80 must be shaped so as not to impede the introduction of the spout 21 when the pallet of rest 7 disengages from the spur wheel. exhaust 2.

De façon analogue le flanc de sortie ou montant 25 devra être conformé de façon à être sûr qu'à la fin de la fonction impulsion, la palette de repos 7 soit sur la trajectoire d'une dent de la roue d'échappement afin de l'intercepter puis de l'arrêter.Similarly, the exit flank or upright 25 must be shaped so as to be sure that at the end of the impulse function, the rest pallet 7 is on the trajectory of a tooth of the escape wheel in order to intercept and stop it.

Claims (4)

  1. Detent escapement for a timepiece including an escapement wheel (2), a balance on the pin (16) of which are fixed a large roller (4), fitted with an impulse pallet stone (5) and a first actuating finger (14), a blocking member in the form of a lever (6) hinged on a pin, said blocking member carrying a locking pallet stone (7), a second actuating finger (11) and a follower (20) which ends in a beak (21), said escapement further including an elastic member (12) acting on one of the actuating finger (14) to drive the other finger (11) and actuate the blocking member when the roller (4) rotates in a first direction (a) and to move around said other finger (11) without driving the roller (4) when said roller (4) rotates in a second direction (b) opposite to the first, the pin (16) of the balance further carrying a small roller (23) in the circular periphery (24) of which a notch (22) is made in which the beak (21) of the follower (20) penetrates when the locking pallet-stone (7) releases itself from the escapement wheel (2), characterised in that the return of the pallet-stone (7) in the locking position is caused by a rising flank (25) of said notch, said rising flank being slanted such that the beak (21) climbs over said flank when the small roller (23) rotates in said first direction (a).
  2. Escapement according to claim 1, characterised in that a first arm (9) carrying the locking pallet-stone (7) and a second branch (10) carrying the actuating finger (11) and the follower (20) terminated by the beak (21), the elastic member (12) acting on the first actuating member (14).
  3. Escapement according to claim 2, characterised in that the elastic member (12) is disposed between the large roller (4) and the small roller (23).
  4. Escapement according to claim 1 or 2, characterised in that the follower (20) is arranged so that its beak shaped end is immobilized near the circular periphery (24) of the small roller (23) but without touching it, when the locking pallet-stone (7) is fully engaged in the escapement wheel (2).
EP03027929A 2003-12-04 2003-12-04 Detent escapement for watches Expired - Lifetime EP1538491B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
AT03027929T ATE487963T1 (en) 2003-12-04 2003-12-04 CHRONOMETER ESCAPEMENT FOR WATCHES
DE60334916T DE60334916D1 (en) 2003-12-04 2003-12-04 Chronometer escapement for watches
EP03027929A EP1538491B1 (en) 2003-12-04 2003-12-04 Detent escapement for watches
SG200407226A SG112956A1 (en) 2003-12-04 2004-11-26 Detent escapement for a timepiece
US11/000,404 US7040803B2 (en) 2003-12-04 2004-12-01 Detent escapement for a timepiece
CNB2004100969416A CN100547502C (en) 2003-12-04 2004-12-06 The escapement that is used for clock and watch
JP2004352953A JP4708775B2 (en) 2003-12-04 2004-12-06 Watch detent escapement
HK05106167.9A HK1073699A1 (en) 2003-12-04 2005-07-21 Detent escapement for a timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03027929A EP1538491B1 (en) 2003-12-04 2003-12-04 Detent escapement for watches

Publications (2)

Publication Number Publication Date
EP1538491A1 EP1538491A1 (en) 2005-06-08
EP1538491B1 true EP1538491B1 (en) 2010-11-10

Family

ID=34442959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03027929A Expired - Lifetime EP1538491B1 (en) 2003-12-04 2003-12-04 Detent escapement for watches

Country Status (8)

Country Link
US (1) US7040803B2 (en)
EP (1) EP1538491B1 (en)
JP (1) JP4708775B2 (en)
CN (1) CN100547502C (en)
AT (1) ATE487963T1 (en)
DE (1) DE60334916D1 (en)
HK (1) HK1073699A1 (en)
SG (1) SG112956A1 (en)

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DE602005005633T2 (en) 2005-03-30 2009-04-16 Montres Breguet S.A. Chronometer escapement for watches
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EP1770452A1 (en) * 2005-09-30 2007-04-04 Peter Baumberger Detent escapement for timepieces
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ATE433136T1 (en) * 2007-03-09 2009-06-15 Eta Sa Mft Horlogere Suisse ESCAPEMENT WITH TANGENTIAL IMPULSES
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DE602007004446D1 (en) * 2007-04-18 2010-03-11 Eta Sa Mft Horlogere Suisse Direct impulse inhibition for watches
EP2105806B1 (en) * 2008-03-27 2013-11-13 Sowind S.A. Escapement mechanism
JP5366318B2 (en) * 2009-09-14 2013-12-11 セイコーインスツル株式会社 Detent escapement and method of manufacturing detent escapement operating lever
JP5366319B2 (en) * 2009-09-14 2013-12-11 セイコーインスツル株式会社 Detent escapement and mechanical watch having the same
IT1396734B1 (en) * 2009-11-25 2012-12-14 Ferrara ESCAPEMENT FOR HIGH PERFORMANCE CLOCKS.
JP5441168B2 (en) * 2010-03-10 2014-03-12 セイコーインスツル株式会社 Detent escapement and mechanical watch
JP5729665B2 (en) * 2010-09-14 2015-06-03 セイコーインスツル株式会社 Watch detent escapement and mechanical watch
JP5729666B2 (en) * 2010-09-14 2015-06-03 セイコーインスツル株式会社 Watch detent escapement and mechanical watch
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Also Published As

Publication number Publication date
SG112956A1 (en) 2005-07-28
HK1073699A1 (en) 2005-10-14
ATE487963T1 (en) 2010-11-15
DE60334916D1 (en) 2010-12-23
JP4708775B2 (en) 2011-06-22
CN1624607A (en) 2005-06-08
US20050122848A1 (en) 2005-06-09
EP1538491A1 (en) 2005-06-08
CN100547502C (en) 2009-10-07
US7040803B2 (en) 2006-05-09
JP2005164599A (en) 2005-06-23

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