EP3070537A1 - Zeitbasiseinheit, die eine hemmung mit direktimpuls und konstanter kraft umfasst - Google Patents

Zeitbasiseinheit, die eine hemmung mit direktimpuls und konstanter kraft umfasst Download PDF

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Publication number
EP3070537A1
EP3070537A1 EP15159758.0A EP15159758A EP3070537A1 EP 3070537 A1 EP3070537 A1 EP 3070537A1 EP 15159758 A EP15159758 A EP 15159758A EP 3070537 A1 EP3070537 A1 EP 3070537A1
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EP
European Patent Office
Prior art keywords
wheel
impulse
pulse
balance
time base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15159758.0A
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English (en)
French (fr)
Inventor
Karsten Fraessdorf
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.)
L Leroy SA
Original Assignee
L Leroy 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 L Leroy SA filed Critical L Leroy SA
Priority to EP15159758.0A priority Critical patent/EP3070537A1/de
Publication of EP3070537A1 publication Critical patent/EP3070537A1/de
Withdrawn legal-status Critical Current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
    • 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
    • G04B15/06—Free 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
    • G04B15/10—Escapements with constant impulses for the regulating mechanism

Definitions

  • the present invention relates to a time base, for a watch movement, comprising a balance associated with a return member arranged in such a way that the balance is able to perform periodic oscillations around a balance axis, the balance being associated with an exhaust comprising an escape wheel, intended to be kinematically connected to a source of mechanical energy of the watch movement, and an anchor comprising, on the one hand, a pair of vanes arranged to cooperate with the escape wheel and, on the other hand, a fork arranged to cooperate with a plateau pin carried by a pendulum plate integral in rotation with the balance wheel , the balance being further secured to an additional balance plate carrying a pulse pallet for periodically receiving pulses of the exhaust.
  • Time bases of this type, direct impulse, have been known for a long time even if they are not widespread in mechanical timepieces sold today.
  • the patent CH101849 issued in 1923 in the name of Jules Pellaton, describes a particular realization.
  • this document describes a time base comprising a sprung balance associated with a direct impulse escapement comprising an escape wheel, connected to a barrel via a finishing train, and an anchor carrying two pallets. , an input and an output, arranged to cooperate alternately with the escape wheel.
  • the balance is secured to a conventional balance plate carrying a plate pin cooperating with a fork of the anchor to rotate the latter at each alternation of the balance.
  • the balance is also secured to an additional tray carrying a pallet pulse, also arranged to cooperate with the escape wheel, for the purpose of receiving a pulse directly from the latter during a pulse alternation, that is to say every alternate alternation.
  • a main object of the present invention is to propose a time base, for a watch movement, whose oscillation frequency is independent of the state of charge of the source of mechanical energy from which it receives the energy to ensure the maintenance of oscillations.
  • the invention relates more particularly to a time base, for a watch movement, of the type mentioned above, characterized in that the escapement comprises a pulse wheel coaxial with the escape wheel and arranged to cooperate with the pulse pallet, during pulse alternations, to ensure the maintenance of oscillations of the pendulum, the escape and impulse wheels having respective teeth having the same number of teeth and being connected to one another by an elastic return member, and in that the anchor comprises an additional pair of pallets arranged to cooperate with the impulse wheel.
  • the pulse is transmitted to the balance from the energy stored in the elastic return member, which is independent of that stored in the main mechanical energy source of the watch movement, thus leading to an exhaust constant force type.
  • the elastic return member discharges a small amount of energy, when the pulse wheel is released to transmit a pulse to the pulse pallet, but is immediately reloaded with the same amount of energy, by rotating the escape wheel at the same angle as that traveled by the impulse wheel.
  • the impulse wheel has a reduced inertia with reference to the escape wheel, because it does not carry a pinion and is not in contact with the finishing gear, which allows it to limit the disturbances due to its interaction with the pendulum.
  • safety devices guaranteeing the reliability of the time base can be provided.
  • it preferably comprises two limiting pins arranged on either side of a rod of the anchor to define an angular range of rotation of the anchor.
  • the anchor carries a sting capable of cooperating with the periphery of the balance plate to prevent a reversal, the balance plate having a notch arranged to allow periodically the passage of the stinger from one side to the other. other of the line joining the pivot axes of the anchor and the balance plate.
  • the vanes are arranged relative to the escape wheel and, on the other hand, that the additional vanes are arranged relative to the impulse wheel so that the impulse wheel is released before the escape wheel during pulse alternations.
  • the pallets are arranged relative to the escape wheel and, on the other hand, the additional pallets are arranged relative to the impulse wheel in such a way that the wheel Exhaust is released during the pulse alternations after the pulse pallet has crossed the line joining the pivot axes of the impulse wheel and the balance plate.
  • the vanes are arranged relative to the escape wheel so that the latter performs a rotation of a half-step at each alternation.
  • the additional pallets are arranged relative to the impulse wheel in such a way that, in one oscillation, the impulse wheel travels at a higher rotational angle, preferably four times higher, when alternation of impulse than that which it traverses during the complementary alternation.
  • the additional pair of pallets comprises an entry pallet and an exit pallet, the exit pallet being shaped in such a way that the impulse wheel transmits an impulse when it is released at course of the alternation complementary to the alternation of impulse.
  • the invention also relates to a watch movement comprising a time base meeting the characteristics just described and a timepiece equipped with such a watch movement.
  • the time base comprises a spiral balance (not shown) associated with a constant force and direct impulse type escapement.
  • the time base here comprises two coaxial escapement wheels, one of which will be called the escape wheel 2 and the second will be called the impulse wheel 4.
  • the two wheels 2 and 4 have the same number of teeth and substantially the same diameter of teeth.
  • the escape wheel 2 carries an exhaust pinion (not visible) intended to be kinematically connected to a source of mechanical energy of a watch movement via a finishing train.
  • the impulse wheel 4 is connected to the escape wheel 2 by means of an elastic return member, for example a spiral spring (not visible).
  • an elastic return member for example a spiral spring (not visible).
  • a double anchor 6 is associated with the two wheels 2 and 4.
  • the anchor 6 is intended to be pivotally mounted on the frame of the watch movement, along an axis of rotation defined by a span screw 8 housed in a suitable hole of the anchor 6. It comprises a base 10 having a rod 12 arranged between two limit pins 14, intended to be assembled to the frame of the watch movement, to define a range of rotation of the anchor 6.
  • the range of rotation of the anchor 6 may be of the order of a few degrees, preferably about 3 degrees.
  • the base 10 carries a first pair of vanes, including an entry pallet 16 and an outlet pallet 17, arranged on either side of the axis of rotation of the anchor to cooperate with the escape wheel 2 .
  • the base 10 also comprises a fork 18, at its free end opposite the rod 12, arranged to cooperate with a plate pin 20.
  • the plate pin 20 is housed in a hole 22 formed in a plate 24 integral with rotation of the balance.
  • the hole 22 is made here in a manner similar to an anchor cell, that is to say that it extends in a radial direction with reference to the plate 24, so that the Tray pin 20 may have a portion arranged radially projecting with reference to the hole 22 in order to periodically cooperate with the fork 18 and pivot the anchor 6.
  • the plate 24 has a generally cylindrical shape delimited by two substantially flat faces, the hole 22 being open on at least one of the two faces, so that a tool can be inserted between the plate pin 20 and the bottom of the hole 22, to be able to easily act on the plate pin 20, if necessary, and push it out of the hole 22 to increase the length of its projecting portion.
  • the plate pin 20 further has a symmetrical shape with reference to a median radial plane of the hole 22, to cooperate equivalently with the fork 18 regardless of the direction of rotation of the balance.
  • the plate pin 20 has an end portion (outer) whose width is greater than that of the hole 22, but slightly smaller than that of the fork 18 of the anchor 6.
  • the anchor 6 comprises an additional base 26 carrying a second pair of vanes, including an entry pallet 28 and an outlet pallet 29, arranged to cooperate with the toothing of the impulse wheel. 4.
  • the relative orientation of the additional base 26 on the base 10 is preferably adjustable.
  • the first and second pairs of vanes 16, 17, 28, 29, on the one hand, and the teeth of the wheels 2, 4, on the other hand, are arranged in such a way that the vanes 16, 17 of the first pair cooperate. with the escape wheel 2 and the pallets 28, 29 of the second pair cooperate with the impulse wheel 4 with a slight time shift.
  • the kinematics of the exhaust will be explained in detail in the following description.
  • the balance is rotatably connected to an additional plate 30 carrying a pulse pallet 32 arranged to cooperate with the toothing of the pulse wheel 4.
  • the pulse pallet 32 receives a pulse from the wheel pulse 4 all the alternation of the pendulum out of two. This pulse is therefore direct, from the impulse wheel 4 to the balance, and therefore has a better efficiency than in the case of an impulse transmitted via an anchor.
  • the plate 24 advantageously comprises a notch (not visible) arranged to cooperate with a dart 34 (shown in FIG. figure 5 ) carried by the anchor 6 to prevent a reversal of the exhaust, in known manner.
  • the figure 1 illustrates a first state in which the anchor 6 abuts against one of the limiting pins 14.
  • the escape wheel 2 rests on the entry pallet 16 by one of its teeth, while the impulse wheel 4 rests on the additional entry pallet 28 by one of its teeth.
  • the sprung balance rotates counter-clockwise, as indicated by the arrow F1.
  • the figure 2 illustrates the following state, corresponding to the input of the plate pin 20 in the fork 18 to pivot the anchor 6, the latter being always disposed in abutment against the limiting pin 14 in the state illustrated on the figure 2 .
  • the plateau pin 20 acts on the tooth of the fork located downstream, as is apparent from the view of the figure 3 , to begin to rotate the anchor 6 in the clockwise direction.
  • the impulse pallet 32 is passed past a tooth of the impulse wheel 4 without touching it, in a position that allows it to receive a pulse.
  • the figure 3a illustrates a detail of the representation of the figure 3 , more precisely the positions of the entry pallets 16 and 28 in relation to the wheels 2 and 4.
  • the impulse wheel 4 When the impulse wheel 4 is released, as illustrated on the figure 4 , it starts to rotate in the direction of clockwise rotation under the effect of the action of the elastic return member arranged between it and the escape wheel 2. One of its teeth then comes into contact with the pulse pallet 32 of the additional balance plate 30 to transmit a pulse to maintain the periodic oscillations of the sprung balance.
  • the escape wheel 2 remains locked by the entry pallet 16 during this phase.
  • the state illustrated on the figure 5 corresponds to the instant at which the escape wheel 2 is released by the entry pallet 16 of the anchor 6.
  • the stinger 34 of the anchor 6 crosses the line joining the pivot axes of the anchor 6 and the balance plate 24 at this time, thanks to the notch (not visible) of the plate 24.
  • the anchor 6 In its rotation, the anchor 6 has modified the position of the output vanes 17 and 29, to place them on the path of the wheels 2 and 4, as illustrated in FIG. figure 6 .
  • a comparative view of the states of figures 1 and 6 shows that the escape wheel 2 has rotated a half-step during the pulse alternation that has just been described, while the impulse wheel has performed about 4/5 th to not.
  • the sprung balance reverses its direction of rotation in order to turn in the clockwise direction during the alternation complementary to the pulse alternation, as illustrated in FIG. figure 7 by the arrow F2.
  • the position of the impulse wheel 4 in this state is such that the impulse pallet 32 can pass in front of its nearest teeth without coming into contact with them.
  • the plateau peg 20 begins to enter the fork 18 at this time, as shown in FIG. figure 8 , a short moment after the one shown on the figure 7 .
  • the figure 8 represents the moment at which the plate pin 20 comes into contact with one of the horns of the fork 18 to begin to pivot the anchor 6 in the anti-clockwise direction of rotation.
  • the additional output pallet 29 is shaped such that the impulse wheel transmits a pulse, shown schematically by the arrow F3, when released during the alternation complementary to the pulse alternation. More specifically, the output pallet 29 has the impulse wheel 4 an outlet face 36 whose inclination is inverted with reference to the direction of inclination provided on the other pallets. Due to this inverted inclination of the output face 36, the tooth of the impulse wheel 4 exerts a slight force on the additional output pallet 29 when the impulse wheel 4 is released and begins to rotate. Note, however, that this pulse is low and essentially useful when starting the oscillations of the sprung balance or when the latter oscillates with a small amplitude.
  • the escape wheel 2 is released by the output pallet 17 during the pulse phase of the impulse wheel 4 to the additional output pallet 29.
  • the figure 10 illustrates the next moment, when the impulse wheel 4 finally leaves the additional output pallet 29, immediately after the release of the escape wheel 2.
  • the anchor 6 By pivoting, the anchor 6 has brought the input vanes 16 and 28 on the path of the teeth of the wheels 2 and 4 which then travel lost paths.
  • the escape wheel 2 travels a half-step before its next tooth makes contact with the entry pallet 16, while the impulse wheel 4 travels a fifth of a step before its next tooth enters in contact with the additional entry pallet 28.
  • the sprung balance continues to rotate in the clockwise direction up to the maximum amplitude, at the end of alternation complementary to the pulse alternation, before changing direction of rotation and turning in the anti-clockwise direction, to return to the state shown on the figure 1 and start a new oscillation.
  • the escape wheel 2 defining the rotation rate of the mobile of the work train and therefore the display members performs a half-step at each alternation, which advantageously results in a regular displacement of the display members.
  • a limiting pin to the other which is low, preferably of the order of 3 degrees, can limit the disturbances that apply to the pendulum when passing from the plateau peg into the anchor fork.
  • the oscillations of the sprung balance can be restarted easily from a stopped state, as soon as the main mechanical energy source starts to be recharged.
  • the main source of mechanical energy may be a barrel housing a spring and it is sufficient in this case a few turns of winding crown to restart the oscillations of the sprung balance.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
EP15159758.0A 2015-03-18 2015-03-18 Zeitbasiseinheit, die eine hemmung mit direktimpuls und konstanter kraft umfasst Withdrawn EP3070537A1 (de)

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Application Number Priority Date Filing Date Title
EP15159758.0A EP3070537A1 (de) 2015-03-18 2015-03-18 Zeitbasiseinheit, die eine hemmung mit direktimpuls und konstanter kraft umfasst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15159758.0A EP3070537A1 (de) 2015-03-18 2015-03-18 Zeitbasiseinheit, die eine hemmung mit direktimpuls und konstanter kraft umfasst

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EP3070537A1 true EP3070537A1 (de) 2016-09-21

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EP15159758.0A Withdrawn EP3070537A1 (de) 2015-03-18 2015-03-18 Zeitbasiseinheit, die eine hemmung mit direktimpuls und konstanter kraft umfasst

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3557335A1 (de) * 2018-04-17 2019-10-23 Dominique Renaud SA Direkter freier hemmungsmechanismus für uhr
EP3570117A1 (de) * 2018-05-16 2019-11-20 Dominique Renaud SA Hemmungsmechanismus für uhr
WO2019219679A1 (fr) * 2018-05-16 2019-11-21 Dominique Renaud Sa Mécanisme d'échappement pour pièce d'horlogerie
WO2020015889A1 (de) * 2018-07-20 2020-01-23 Creaditive Ag Hemmungssystem und das hemmungssystem umfassendes messgerät
WO2020007619A3 (fr) * 2018-07-02 2020-05-14 Complitime Sa Mecanisme d'echappement horloger
CN112114508A (zh) * 2019-06-19 2020-12-22 爱彼制表公司 用于钟表机芯的杠杆式擒纵机构组件
CN113495474A (zh) * 2020-03-18 2021-10-12 斯沃奇集团研究和开发有限公司 设有包括锚状件的擒纵机构的机械钟表机芯
US11397408B2 (en) 2018-05-25 2022-07-26 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Automatically starting and secured detent escapement for a timepiece

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH101849A (fr) 1922-10-25 1923-11-16 Pellaton Jules Echappement de mouvement de montre.
CH353679A (fr) * 1959-03-24 1961-04-15 Theurillat Xavier Echappement dit à force constante
CH703420A2 (it) * 2010-07-09 2012-01-13 Giovanni Cefis Scappamento per meccanismi ad orologeria.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH101849A (fr) 1922-10-25 1923-11-16 Pellaton Jules Echappement de mouvement de montre.
CH353679A (fr) * 1959-03-24 1961-04-15 Theurillat Xavier Echappement dit à force constante
CH703420A2 (it) * 2010-07-09 2012-01-13 Giovanni Cefis Scappamento per meccanismi ad orologeria.

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11860575B2 (en) 2018-04-17 2024-01-02 François Besse Free direct escapement mechanism for a timepiece
WO2019201977A1 (fr) * 2018-04-17 2019-10-24 Dominique Renaud Sa Mécanisme d'échappement direct libre pour piece d'horlogerie
EP3557335A1 (de) * 2018-04-17 2019-10-23 Dominique Renaud SA Direkter freier hemmungsmechanismus für uhr
CN112334843A (zh) * 2018-04-17 2021-02-05 埃里克·弗雷蒙德 用于钟表的自由直接式擒纵机构
CN112334843B (zh) * 2018-04-17 2022-04-05 埃里克·弗雷蒙德 用于钟表的自由直接式擒纵机构
EP3570117A1 (de) * 2018-05-16 2019-11-20 Dominique Renaud SA Hemmungsmechanismus für uhr
WO2019219679A1 (fr) * 2018-05-16 2019-11-21 Dominique Renaud Sa Mécanisme d'échappement pour pièce d'horlogerie
US11860576B2 (en) 2018-05-16 2024-01-02 François Besse Escapement mechanism for timepiece
US11397408B2 (en) 2018-05-25 2022-07-26 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Automatically starting and secured detent escapement for a timepiece
WO2020007619A3 (fr) * 2018-07-02 2020-05-14 Complitime Sa Mecanisme d'echappement horloger
US11988993B2 (en) 2018-07-02 2024-05-21 Complitime Sa Timepiece escapement mechanism
US20210141340A1 (en) * 2018-07-02 2021-05-13 Complitime Sa Timepiece escapement mechanism
WO2020015889A1 (de) * 2018-07-20 2020-01-23 Creaditive Ag Hemmungssystem und das hemmungssystem umfassendes messgerät
CN112114508B (zh) * 2019-06-19 2023-07-25 爱彼制表公司 用于钟表机芯的杠杆式擒纵机构组件
CN112114508A (zh) * 2019-06-19 2020-12-22 爱彼制表公司 用于钟表机芯的杠杆式擒纵机构组件
CN113495474A (zh) * 2020-03-18 2021-10-12 斯沃奇集团研究和开发有限公司 设有包括锚状件的擒纵机构的机械钟表机芯

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