EP2941673B1 - Escapement device for a clock movement - Google Patents

Escapement device for a clock movement Download PDF

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Publication number
EP2941673B1
EP2941673B1 EP14725591.3A EP14725591A EP2941673B1 EP 2941673 B1 EP2941673 B1 EP 2941673B1 EP 14725591 A EP14725591 A EP 14725591A EP 2941673 B1 EP2941673 B1 EP 2941673B1
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EP
European Patent Office
Prior art keywords
escape wheel
cam
wheel
transmission means
balance
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.)
Not-in-force
Application number
EP14725591.3A
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German (de)
French (fr)
Other versions
EP2941673A2 (en
Inventor
Tu Xuan Mai
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.)
Detra SA
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Detra SA
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Publication of EP2941673A2 publication Critical patent/EP2941673A2/en
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Publication of EP2941673B1 publication Critical patent/EP2941673B1/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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • 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
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel

Definitions

  • the present invention relates to an exhaust device for a timepiece, in particular for a spiral balance type wristwatch.
  • the patent EP 0018796 B1 proposes a tangential drive exhaust.
  • This escapement has an escape wheel consisting of two superimposed gears (10) and a rocker having 2 locking vanes (20,21), 2 impulse vanes (25,26) and a plateau pin (18).
  • the figure 7 patent EP 0018796 B1 discloses a variant with an exhaust wheel at a level.
  • the object of the present invention is to overcome the drawbacks mentioned above by providing a tangential drive exhaust device with two active alternations per oscillation period of the balance spring, with a single-level escape wheel.
  • the figure 2 represents the start of clearance of the first rest position of the exhaust of the figure 1 .
  • the tooth 11 of the escape wheel is based on the first rest surface 211.
  • the surface 211 is generally concave. This concave surface may be a continuous surface or formed by two inclined planes to create the entry rest position Re for the end of the tooth of the escape wheel. With the balance plate rotating in the clockwise direction, the pin 31 comes into contact with the second cam 22 and releases the rocker 2 from the rest position Re.
  • the figure 3 represents the escape of the figure 1 during the impulse phase when the pendulum rotates clockwise.
  • the escape wheel released from the rest position, advances in the anti-clockwise direction under the action of the cylinder torque and gives the mechanical impulse to the balance by the action of the tooth 12 of the escape wheel on the pallet 32.
  • the figure 4 represents the end of the impulse phase when the pendulum rotates clockwise.
  • the tooth 12 of the escape wheel leaves the pallet 32 while the end of the tooth 11 of the escape wheel and the second resting surface 221 come closer together.
  • the figure 5 represents the start of clearance of the second rest position of the exhaust of the figure 1 .
  • the tooth 11 of the escape wheel rests on the second resting surface 221.
  • the surface 221 is also concave and the end of the tooth 11 is locked at the exit rest position Rs.
  • the figure 6 represents the escape of the figure 1 during the impulse phase when the pendulum rotates counter-clockwise.
  • the escape wheel released from the rest position, advances in the counterclockwise direction under the action of the barrel pair and gives the impulse mechanical pendulum through the cam 22 of the rocker 2 by the action of the tooth 11 of the escape wheel on the pulse surface 222.
  • the figure 7 represents the end of the impulse phase when the pendulum rotates counter-clockwise.
  • the tooth 11 of the escape wheel leaves the impulse surface 222 while the end of the tooth 15 of the escape wheel and the first resting surface 211 come closer together.
  • the tooth 15 of the escape wheel will be blocked on the resting surface 211 at the resting position Re and the process starts again.
  • the figure 8 represents the angle ⁇ between the input and output rest positions as seen from the axis of the escape wheel and the angle ⁇ between the input rest position and the axis of the rocker 2 also seen from the axis of the escape wheel. It can be seen that in the case of the escapement according to the invention, the angle ⁇ is smaller than the angle ⁇ , unlike the exhaust device presented in the patent. EP 0018796 B1 .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)

Description

La présente invention concerne un dispositif d'échappement pour une pièce d'horlogerie, notamment pour une montre bracelet de type balancier spiral.The present invention relates to an exhaust device for a timepiece, in particular for a spiral balance type wristwatch.

On connaît le rôle important de l'échappement dans une montre mécanique qui entretient l'oscillation du balancier spiral et synchronise le mouvement du rouage avec la fréquence de l'oscillateur mécanique.The important role of the escapement in a mechanical watch which maintains the oscillation of the balance spring and synchronizes the movement of the gear with the frequency of the mechanical oscillator is known.

Pour éviter les problèmes d'usure et de lubrification rencontrés dans les échappements à ancre suisse, le brevet EP 0018796 B1 propose un échappement à entrainement tangentiel. Cet échappement possède une roue d'échappement composée de deux roues dentées superposées (10) et une bascule comportant 2 palettes de verrouillage (20,21), 2 palettes d'impulsion (25,26) et une cheville de plateau (18). La figure 7 du brevet EP 0018796 B1 divulgue une variante avec une roue d'echappement à un niveau.To avoid the problems of wear and lubrication encountered in Swiss anchor escapements, the patent EP 0018796 B1 proposes a tangential drive exhaust. This escapement has an escape wheel consisting of two superimposed gears (10) and a rocker having 2 locking vanes (20,21), 2 impulse vanes (25,26) and a plateau pin (18). The figure 7 patent EP 0018796 B1 discloses a variant with an exhaust wheel at a level.

L'inconvénient de ces échappements est le doublement des éléments fonctionnels par rapport à l'échappement à ancre suisse (roue d'échappement à deux niveaux et/ou double nombre de palettes). L'augmentation de l'inertie de la roue d'échappement à 2 niveaux diminue le rendement et/ou le doublement des palettes complique le réglage final de l'échappement.The disadvantage of these exhausts is the doubling of the functional elements compared to the Swiss lever escapement (escape wheel with two levels and / or double number of pallets). Increasing the inertia of the 2-level escapement wheel reduces the efficiency and / or the doubling of the pallets complicates the final adjustment of the exhaust.

Le but de la présente invention est de remédier aux inconvénients mentionnés ci-dessus en proposant un dispositif d'échappement à entraînement tangentiel à deux alternances actives par période d'oscillation du balancier spiral, avec une roue d'échappement à un seul niveau.The object of the present invention is to overcome the drawbacks mentioned above by providing a tangential drive exhaust device with two active alternations per oscillation period of the balance spring, with a single-level escape wheel.

A cet effet, le dispositif d'échappement tel que définit dans la revendication 1 possède une roue d'échappement à un seul niveau grâce à l'agencement des positions de repos et des cames. On peut également noter que selon cet agencement, le nombre total des palettes est réduit.

  • La figure 1 représente une vue générale d'une forme d'exécution du dispositif d'échappement selon l'invention
  • La figure 2 représente le début de dégagement de la première position de repos du dispositif d'échappement de la figure 1.
  • La figure 3 représente l'échappement de la figure 1 pendant la phase d'impulsion lorsque le balancier tourne dans le sens horaire.
  • La figure 4 représente la fin de la phase d'impulsion lorsque le balancier tourne dans le sens horaire.
  • La figure 5 représente le début de dégagement de la deuxième position de repos du dispositif d'échappement de la figure 1.
  • La figure 6 représente l'échappement de la figure 1 pendant la phase d'impulsion lorsque le balancier tourne dans le sens anti-horaire.
  • La figure 7 représente la fin de la phase d'impulsion lorsque le balancier tourne dans le sens anti-horaire.
  • La figure 8 représente les angles α et β vus de l'axe de la roue d'échappement.
For this purpose, the exhaust device as defined in claim 1 has a single-level escape wheel through the arrangement of the rest positions and cams. It can also be noted that according to this arrangement, the total number of pallets is reduced.
  • The figure 1 represents a general view of an embodiment of the exhaust device according to the invention
  • The figure 2 represents the start of clearance of the first rest position of the exhaust system of the figure 1 .
  • The figure 3 represents the escape of the figure 1 during the impulse phase when the pendulum rotates clockwise.
  • The figure 4 represents the end of the impulse phase when the pendulum rotates clockwise.
  • The figure 5 represents the beginning of clearance of the second rest position of the exhaust system of the figure 1 .
  • The figure 6 represents the escape of the figure 1 during the impulse phase when the pendulum rotates counter-clockwise.
  • The figure 7 represents the end of the impulse phase when the pendulum rotates counter-clockwise.
  • The figure 8 represents the angles α and β seen from the axis of the escape wheel.

La figure 1 représente une vue générale en plan et en coupe partielle d'une forme d'exécution du dispositif d'échappement selon l'invention. Ce dispositif comprend :

  • une roue d'échappement 1 entraînée par le barillet à travers les roues de transmission ; cette roue d'échappement tourne autour de l'axe 10 dans le sens anti-horaire.
  • une bascule 2 pivotant autour de l'axe 20 et comportant une première came 21 coopérant dans un premier plan avec la roue d'échappement 1 et une deuxième came 22 coopérant dans un deuxième plan avec la cheville 31 du plateau de balancier. La première came 21 possède une première surface de repos 211 de forme concave, une deuxième surface de repos 221 également de forme concave ainsi qu'une surface d'impulsion 222 adjacente à la deuxième surface de repos 221.
  • un plateau de balancier 3 pivotant autour de l'axe 30. Ce plateau comporte une cheville 31 et une palette 32 coopérant avec la roue d'échappement 1.
The figure 1 represents a general view in plan and in partial section of an embodiment of the exhaust device according to the invention. This device comprises:
  • an escape wheel 1 driven by the barrel through the transmission wheels; this escape wheel rotates about the axis 10 in the counterclockwise direction.
  • a rocker 2 pivoting about the axis 20 and having a first cam 21 cooperating in a first plane with the escape wheel 1 and a second cam 22 cooperating in a second plane with the pin 31 of the balance plate. The first cam 21 has a first resting surface 211 of concave shape, a second resting surface 221 also of concave shape and a pulse surface 222 adjacent to the second resting surface 221.
  • a balance plate 3 pivoting about the axis 30. This plate comprises a pin 31 and a pallet 32 cooperating with the escape wheel 1.

Les figures qui suivent décrivent les principales étapes de fonctionnement du dispositif d'échappement selon invention. La figure 2 représente le début de dégagement de la première position de repos de l'échappement de la figure 1. Dans cette figure la dent 11 de la roue d'échappement s'appuie sur la première surface de repos 211. Pour assurer le verrouillage de la roue d'échappement, la surface 211 est en général de forme concave. Cette surface concave peut être une surface continue ou formée par 2 plans inclinés afin de créer la position de repos d'entrée Re pour l'extrémité de la dent de la roue d'échappement. Le plateau du balancier tournant dans le sens horaire, la cheville 31 vient en contact avec la deuxième came 22 et dégage la bascule 2 de la position de repos Re.The following figures describe the main operating steps of the exhaust device according to the invention. The figure 2 represents the start of clearance of the first rest position of the exhaust of the figure 1 . In this figure the tooth 11 of the escape wheel is based on the first rest surface 211. To ensure the locking of the escape wheel, the surface 211 is generally concave. This concave surface may be a continuous surface or formed by two inclined planes to create the entry rest position Re for the end of the tooth of the escape wheel. With the balance plate rotating in the clockwise direction, the pin 31 comes into contact with the second cam 22 and releases the rocker 2 from the rest position Re.

La figure 3 représente l'échappement de la figure 1 pendant la phase d'impulsion lorsque le balancier tourne dans le sens horaire. Dans cette figure, la roue d'échappement, libérée de la position de repos, avance dans le sens anti-horaire sous l'action du couple de barillet et donne l'impulsion mécanique au balancier par l'action de la dent 12 de la roue d'échappement sur la palette 32.The figure 3 represents the escape of the figure 1 during the impulse phase when the pendulum rotates clockwise. In this figure, the escape wheel, released from the rest position, advances in the anti-clockwise direction under the action of the cylinder torque and gives the mechanical impulse to the balance by the action of the tooth 12 of the escape wheel on the pallet 32.

La figure 4 représente la fin de la phase d'impulsion lorsque le balancier tourne dans le sens horaire. Dans cette figure, la dent 12 de la roue d'échappement quitte la palette 32 tandis que l'extrémité de la dent 11 de la roue d'échappement et la deuxième surface de repos 221 se rapprochent.The figure 4 represents the end of the impulse phase when the pendulum rotates clockwise. In this figure, the tooth 12 of the escape wheel leaves the pallet 32 while the end of the tooth 11 of the escape wheel and the second resting surface 221 come closer together.

La figure 5 représente le début de dégagement de la deuxième position de repos de l'échappement de la figure 1. Dans cette figure la dent 11 de la roue d'échappement s'appuie sur la deuxième surface de repos 221. Pour assurer le verrouillage de la roue d'échappement, la surface 221 est également de forme concave et l'extrémité de la dent 11 est verrouillée à la position de repos de sortie Rs. Le plateau du balancier tournant dans le sens anti-horaire, la cheville 31 vient en contact avec la deuxième came 22 et dégage la bascule 2 de la position de repos Rs.The figure 5 represents the start of clearance of the second rest position of the exhaust of the figure 1 . In this figure the tooth 11 of the escape wheel rests on the second resting surface 221. To ensure the locking of the escape wheel, the surface 221 is also concave and the end of the tooth 11 is locked at the exit rest position Rs. With the balance plate rotating in the counter-clockwise direction, the pin 31 comes into contact with the second cam 22 and releases the rocker 2 from the rest position Rs.

La figure 6 représente l'échappement de la figure 1 pendant la phase d'impulsion lorsque le balancier tourne dans le sens anti-horaire. Dans cette figure, la roue d'échappement, libérée de la position de repos, avance dans le sens anti-horaire sous l'action du couple de barillet et donne l'impulsion mécanique au balancier à travers la came 22 de la bascule 2 par l'action de la dent 11 de la roue d'échappement sur la surface d'impulsion 222.The figure 6 represents the escape of the figure 1 during the impulse phase when the pendulum rotates counter-clockwise. In this figure, the escape wheel, released from the rest position, advances in the counterclockwise direction under the action of the barrel pair and gives the impulse mechanical pendulum through the cam 22 of the rocker 2 by the action of the tooth 11 of the escape wheel on the pulse surface 222.

La figure 7 représente la fin de la phase d'impulsion lorsque le balancier tourne dans le sens anti-horaire. Dans cette figure, la dent 11 de la roue d'échappement quitte la surface d'impulsion 222 tandis que l'extrémité de la dent 15 de la roue d'échappement et la première surface de repos 211 se rapprochent. La dent 15 de la roue d'échappement va être bloquée sur la surface de repos 211 à la position de repos d'entrée Re et le processus recommenceThe figure 7 represents the end of the impulse phase when the pendulum rotates counter-clockwise. In this figure, the tooth 11 of the escape wheel leaves the impulse surface 222 while the end of the tooth 15 of the escape wheel and the first resting surface 211 come closer together. The tooth 15 of the escape wheel will be blocked on the resting surface 211 at the resting position Re and the process starts again.

La figure 8 représente l'angle α entre les positions de repos d'entrée et de sortie vu de l'axe de la roue d'échappement ainsi que l'angle β entre la position de repos d'entrée et l'axe de la bascule 2 également vu de l'axe de la roue d'échappement. On constate que dans le cas de l'échappement selon l'invention, l'angle α est plus petit que l'angle β, contrairement au dispositif d'échappement présenté dans le brevet EP 0018796 B1 .The figure 8 represents the angle α between the input and output rest positions as seen from the axis of the escape wheel and the angle β between the input rest position and the axis of the rocker 2 also seen from the axis of the escape wheel. It can be seen that in the case of the escapement according to the invention, the angle α is smaller than the angle β, unlike the exhaust device presented in the patent. EP 0018796 B1 .

On comprendra que diverses modifications et/ou améliorations évidentes pour l'homme du métier peuvent être apportées aux différents modes de réalisation de l'invention décrits dans la présente description sans sortir du cadre de l'invention défini par les revendications annexées.It will be understood that various modifications and / or improvements obvious to those skilled in the art can be made to the various embodiments of the invention described in the present description without departing from the scope of the invention defined by the appended claims.

Claims (5)

  1. An escapement device for a clockwork movement with two active alternations between a balance roller (3) and an escape wheel (1), comprising:
    - a rocker (2) comprising a first cam (21) located in a first plane, and a second cam (22) located in a second plane,
    - first mechanical transmission means (222) and blocking means (211, 221) acting between the first cam (21) and the escape wheel,
    - second mechanical transmission means (22, 31) acting between the second cam and the balance roller,
    - third mechanical transmission means (32) acting between the escape wheel and the balance roller,
    wherein:
    - the first cam is capable of blocking the escape wheel at each alternation of oscillation of the balance wheel,
    - the first cam is able to receive a mechanical impulse from the escape wheel at each period of oscillation of the balance wheel by said first mechanical transmission means (222) and capable of transmitting this mechanical impulse to the balance wheel by said second mechanical transmission means (22, 31),
    - the balance roller is capable of receiving a mechanical impulse from the escape wheel at each period of oscillation of the balance wheel by said third mechanical transmission means (32),
    characterized:
    - in that the angle α between the input and output resting positions, seen from the axis (10) of the escape wheel, is smaller than the angle β between the input resting position and the axis (20) of the rocker (2), seen from the axis (10) of the escape wheel,
    - in that one of the first blocage means (221) is adjacent to the first mechanical transmission means (222).
  2. The escapement device according to claim 1, characterized in that the mechanical impulse passing directly from the escape wheel to the balance roller by said third mechanical transmission means (32) occurs immediately after the release of the escape wheel from the input resting position (Re).
  3. Escapement device according to claim 1 or according to claim 2, characterized in that the input and output resting surfaces (211, 221) of the first cam (21) are concave surfaces.
  4. The escapement device according to claim 1 or according to claim 2, characterized in that the input and output resting surfaces (211, 221) of the first cam (21) are formed by 2 inclined planes.
  5. A timepiece equipped with an escapement device according to one of the preceding claims.
EP14725591.3A 2013-04-03 2014-03-21 Escapement device for a clock movement Not-in-force EP2941673B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00711/13A CH707862A2 (en) 2013-04-03 2013-04-03 An exhaust device for a timepiece movement.
PCT/CH2014/000037 WO2014161098A2 (en) 2013-04-03 2014-03-21 Escapement device for a clock movement

Publications (2)

Publication Number Publication Date
EP2941673A2 EP2941673A2 (en) 2015-11-11
EP2941673B1 true EP2941673B1 (en) 2016-08-17

Family

ID=50771354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14725591.3A Not-in-force EP2941673B1 (en) 2013-04-03 2014-03-21 Escapement device for a clock movement

Country Status (3)

Country Link
EP (1) EP2941673B1 (en)
CH (1) CH707862A2 (en)
WO (1) WO2014161098A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3982203A1 (en) 2020-10-07 2022-04-13 Patek Philippe SA Genève Timepiece escapement with semi-direct pulse
EP3982206A1 (en) 2020-10-07 2022-04-13 Patek Philippe SA Genève Timepiece oscillator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3074589B1 (en) * 2017-12-02 2022-03-25 Jean Pommier HORLOGICAL EXHAUST WITH A COUP LOST ANCHOR

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018796B1 (en) 1979-04-30 1984-11-07 George Daniels Watches, clocks and chronometers and escapements therefor
DE602007008077D1 (en) * 2007-05-30 2010-09-09 Omega Sa Anchor escapement for watches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3982203A1 (en) 2020-10-07 2022-04-13 Patek Philippe SA Genève Timepiece escapement with semi-direct pulse
EP3982206A1 (en) 2020-10-07 2022-04-13 Patek Philippe SA Genève Timepiece oscillator

Also Published As

Publication number Publication date
WO2014161098A2 (en) 2014-10-09
CH707862A2 (en) 2014-10-15
WO2014161098A3 (en) 2015-04-23
EP2941673A2 (en) 2015-11-11

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