EP1136892A1 - Ratschenantriebsmechanismus für Aufzugssperrad in einer Uhr - Google Patents

Ratschenantriebsmechanismus für Aufzugssperrad in einer Uhr Download PDF

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Publication number
EP1136892A1
EP1136892A1 EP00200998A EP00200998A EP1136892A1 EP 1136892 A1 EP1136892 A1 EP 1136892A1 EP 00200998 A EP00200998 A EP 00200998A EP 00200998 A EP00200998 A EP 00200998A EP 1136892 A1 EP1136892 A1 EP 1136892A1
Authority
EP
European Patent Office
Prior art keywords
spring
pawl
lever
barrel
range
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00200998A
Other languages
English (en)
French (fr)
Other versions
EP1136892B1 (de
Inventor
Giulio Papi
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.)
Audemars Piguet Renaud et Papi SA
Original Assignee
Audemars Piguet Renaud et Papi 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 Audemars Piguet Renaud et Papi SA filed Critical Audemars Piguet Renaud et Papi SA
Priority to AT00200998T priority Critical patent/ATE412204T1/de
Priority to EP00200998A priority patent/EP1136892B1/de
Priority to DE60040591T priority patent/DE60040591D1/de
Publication of EP1136892A1 publication Critical patent/EP1136892A1/de
Application granted granted Critical
Publication of EP1136892B1 publication Critical patent/EP1136892B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/02—Devices allowing the motion of a rotatable part in only one direction
    • G04B11/022—Devices allowing the motion of a rotatable part in only one direction with a ratchet which makes contact with the rotating member by means of teeth
    • 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
    • G04B9/00—Supervision of the state of winding, e.g. indicating the amount of winding
    • G04B9/02—Devices controlled by such state, e.g. device affording protection means against overwinding

Definitions

  • the present invention relates to a rotary drive mechanism a pawl retaining pawl, in particular a winding ratchet, this wheel allowing the winding of a barrel spring mounted on a plate of a timepiece, the pawl comprising a toothing cooperating with the teeth of the wheel, the rotation of this pawl being capable of recoiling to allow a recoil consecutive wheel especially at the end of reassembly, this mechanism comprising a spring acting on the pawl to recall its teeth in the teeth of the wheel when reassembly is interrupted.
  • the barrel turns freely on a tree and contains a mainspring, hooked by its external coil to the barrel and to the shaft by its coil interior.
  • the barrel has a toothing which meshes with the first pinion of the cog of the watch.
  • the barrel shaft has a cylindrical part called plug and fitted with a hook to which the inner end of the spring is attached.
  • the upper pivot of the tree is milled into a square shape to receive a ratchet linked to a winding pinion by a crown.
  • the shaft pivots on the one hand in the plate and the other in a barrel bridge.
  • the ratchet is a lever fitted with a beak that penetrates in the teeth of a wheel under the action of a spring.
  • the ratchet can be provided with or no hindsight.
  • Figure 1 which accompanies this description is a graph showing the torque Cp stored by the spring as a function of the number of winding turns N.
  • Curve a represents the winding of the spring and curve b its disarming.
  • Cp4 an excessive value
  • the watchmaker's known retractable snap has a disadvantage.
  • the angular recoil of the pawl is constant, that is to say that it always has the same recoil angle regardless of the arming level of the spring, as a result of which the recoil of the wheel or ratchet on which the pawl is always the same whether the spring is at the beginning or at the end of reassembly.
  • To wind the spring it will therefore require a number of movements to go and coming from the fingers on the winding crown which is important since after each winding rotation, the wheel or ratchet moves back which disarms the spring correspondingly and thus reduces the yield or the efficiency of reassembly.
  • the present invention in addition to satisfying the definition set out in the first paragraph of this description, is characterized in that that the pawl is provided with a finger on which is likely to exert a force dosed to balance the opposing force developed by the barrel spring at less in a determined range of unwinding of this spring, the angular recoil of said pawl being a measure of the instantaneous torque delivered by said barrel spring within said determined range.
  • Figure 2 illustrates according to the invention the rotary drive mechanism a retaining pawl 1 of a winding ratchet 2.
  • This ratchet 2 is fixed by means from a square 31 to a barrel shaft 5.
  • the barrel 5 has a toothing 33 used for drive the cog (not shown) of the timepiece.
  • the barrel spring is found enclosed (and therefore not visible) in a barrel drum and a cover 32 which covers it. The inner end of the spring is attached to the barrel shaft Figure 2 only shows square 31.
  • Ratchet 2 allows the barrel to be reassembled by means of a crown wheel not shown.
  • the barrel is mounted between a plate 6 and a barrel bridge, not shown.
  • the pawl 1 has a toothing 7 cooperating with the teeth 8 of the ratchet 2.
  • the rotation of this pawl is susceptible of recoil which allows a consecutive recoil of the ratchet especially at the end of winding when the winding crown is released, as described upper.
  • the mechanism also includes a spring 10 acting on the pawl 1 to recall its teeth 7 in the teeth 8 of the ratchet 2 when the reassembly is interrupted. This function will be better described when commenting on Figure 5.
  • the invention is remarkable in that the pawl 1 is provided with a finger 11 on which is likely to exert a force materialized by an arrow F, this force F being dosed to balance the opposing force, materialized by the arrow F ', developed by barrel spring 5. This balance takes place at least within a range determined BC for this spring. It will therefore be understood that the decline angular of the pawl 1, a measurement of the instantaneous torque Cp delivered by the spring of barrel in the determined range defined above.
  • the second range BC is chosen here as the determined range of development of the spring, this range being preferred because it corresponds to a range which it in any case it is advisable to go over to work the spring in a CD area where the torque remains substantially constant and where the proper functioning of the part watchmaking is guaranteed.
  • the force F exerted on the finger 11 of pawl 1 is generated by a spring lever 12.
  • the first end 13 of the spring lever 12 is fixed on the plate 6 or a bridge (not shown), and the second end 14 presses on finger 11 of pawl 1.
  • This spring lever 12 goes depend on the start B as well as the amplitude BC of the determined range which sees the couple of the spring go from Cp1 to Cp2.
  • the spring lever 12 can be oriented at level 13 of its attachment to the plate 6 to define the place B where the track begins determined, the amplitude BC of said range being defined by choosing judiciously the width L and the thickness P of said spring lever.
  • Figure 2 also shows that the second end 14 of the spring lever 12 cooperates with a stop 20 to limit the angular travel of the lever, this travel angular representing the determined range BC of unwinding of the barrel spring.
  • the stop 20 prevents excessive angular displacement of the pawl 1 and of the spring lever 12. In fact, a too large retreat of the pawl would make reassembly tiresome, because at each operation of the winding crown, we would only arm a few teeth the ratchet 2.
  • the second end 14 of the spring lever 12 has the shape of a U whose first branch 34 is arranged in extension of the lever 12 and the second branch 35 of which has an inner wall 36 in contact with the finger 11 of the pawl 1. The angular travel of the lever 12 is limited by the stop 20 likely to come into contact with either the inner wall 37 of the first branch 34, or with the inner wall 38 of the second branch 35.
  • Figure 2 also shows that the second end 14 of the spring lever 12 comprises a rack 25 whose teeth 26 mesh with the teeth 27 of a pinion 28.
  • This pinion carries an indicator needle 21 which materializes the measurement of the instantaneous torque Cp delivered by the barrel spring in the determined range of unfolding of this spring.
  • the indicator needle 21 moves on or in front of a dial 22 on which appear at least first and second indications 23 and 24 showing that the barrel spring is respectively at the start B or at the end C of the determined range BC of its course. So when the needle 21 found, as shown in Figure 2, halfway between the marks 23 and 24, this means that the barrel spring has a torque Cp located between the couples Cp1 and Cp2 corresponding to a number of winding turns located respectively between the letters B and C of the diagram in FIG. 1. This indication lets the bearer of the timepiece that he must wind his watch without delay if he wants to avoid this last is late. Reassembly brings the spring into a CD track where the sufficient torque to ensure proper operation of the instrument. In Figure 2, the right r indicates the angular position of the pawl when the spring is in the middle of the BC range.
  • Figure 4 illustrates the situation where the barrel spring is completely reassembled or armed. The number of winding turns is then between the marks D and G shown in Figure 1, while the torque stored by the spring is is located between the values Cp3 and Cp4. At this time, the internal wall 38 of the lever spring 20 presses against the stop 20. This extreme situation shows that the retreat of the pawl 1 is maximum and this as long as the spring lever 12 is pressed against the stop 20.
  • the straight line q indicates the angular position of the pawl when the spring is at the top of the frame.
  • Figure 4 there is shown in Figure 4, in addition to the line q which indicates the position angle of the pawl at the top of the reinforcement, the straight line p in Figure 3 and the straight line r in the figure 2.
  • the right p indicates the angular position of the pawl when the spring is in the range AB of spring unwinding, the straight line r the angular position of the pawl when the spring is in the middle of the range BC and the line q, the angular position of the pawl when the spring is in the DG range.
  • Figure 5 shows the mechanism of the invention when the barrel spring 5 is being reassembled.
  • Ratchet 2 then rotates in the direction of arrow R and the toothing 7 of the pawl 1 comes out of the teeth 8 of the ratchet 2 and somehow drags on these teeth.
  • the teeth 7 of the pawl are brought back into the teeth 8 of the ratchet 2 by the spring 10 which acts on the pawl.
  • the spring 10 acts on the finger 11 of the pawl 1, this same finger 11 serving jointly supporting the spring lever 12. It will be understood that when the crown winder is released, the pawl will take a place dependent on the degree of reassembly of the barrel spring.
  • the mechanism of the invention allows the measurement of the torque deployed by the spring barrel, mechanism which does not have to be confused with a mechanism allowing to assess the power reserve of the barrel spring.
  • Measuring and displaying the torque by means of an indicator provide information above all on the operating state of the spring and on its quality to perform the functions expected of it.
  • a power reserve indicator can complement the indicator mechanism of couple.
  • the power reserve indicator can indicate an arming maximum, while the torque indicator gives a low value: this is a sign of revision to be done on the movement, change the oils for example.
  • Figure 6 also illustrates other embodiments which can be implemented. work to achieve the goals set by the invention.
  • FIG. 6 it can be seen that the toothing 7 of the pawl 1 does not cooperate either directly with the ratchet 2, but with the teeth 9 of a wheel 3 itself engaged with another wheel 40 which meshes directly with the teeth 8 of the ratchet 2.
  • the winder can directly activate one of the wheels 3 or 40.
  • Figure 6 also shows that on the finger 11 of the pawl 1 acts a simple lever 15 (in place of the spring lever 12 described above), the second end of which 19 is hollowed out to receive the stop 20.
  • the first end 17 of the lever 15 is fixed on the plate 6 by means of a hinge 18.
  • On the lever 15 presses a leaf spring 16 which resembles in all points the spring lever 12 of the previous one execution as for its fixing on the plate and its elastic characteristics.
  • Figure 6 also shows that the second end 19 of the lever 15 has a rack 25 whose teeth 26 is engaged with a mobile 30 which causes in turn the teeth 27 of a pinion 28 secured to the indicator needle 21.
  • this arrangement makes it possible to obtain a more important needle 21.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Springs (AREA)
  • Indicating And Signalling Devices For Elevators (AREA)
  • Electromechanical Clocks (AREA)
EP00200998A 2000-03-20 2000-03-20 Ratschenantriebsmechanismus für Aufzugssperrad in einer Uhr Expired - Lifetime EP1136892B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT00200998T ATE412204T1 (de) 2000-03-20 2000-03-20 Ratschenantriebsmechanismus für aufzugssperrad in einer uhr
EP00200998A EP1136892B1 (de) 2000-03-20 2000-03-20 Ratschenantriebsmechanismus für Aufzugssperrad in einer Uhr
DE60040591T DE60040591D1 (de) 2000-03-20 2000-03-20 Ratschenantriebsmechanismus für Aufzugssperrad in einer Uhr

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00200998A EP1136892B1 (de) 2000-03-20 2000-03-20 Ratschenantriebsmechanismus für Aufzugssperrad in einer Uhr

Publications (2)

Publication Number Publication Date
EP1136892A1 true EP1136892A1 (de) 2001-09-26
EP1136892B1 EP1136892B1 (de) 2008-10-22

Family

ID=8171225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00200998A Expired - Lifetime EP1136892B1 (de) 2000-03-20 2000-03-20 Ratschenantriebsmechanismus für Aufzugssperrad in einer Uhr

Country Status (3)

Country Link
EP (1) EP1136892B1 (de)
AT (1) ATE412204T1 (de)
DE (1) DE60040591D1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006037367A1 (fr) * 2004-10-09 2006-04-13 Dalton Properties Inc Piece d’horlogerie mecanique ou automatique avec dispositif d’indication de la fiabilite de la chronometrie de la piece
WO2009152972A1 (fr) * 2008-06-18 2009-12-23 La Fabrique Du Temps Mouvement horloger comprenant un variateur de couple et piece d'horlogerie munie d'un tel mouvement
CN102057042A (zh) * 2008-06-06 2011-05-11 诺维信公司 家族44木葡聚糖酶变体
EP2339410A1 (de) * 2009-12-28 2011-06-29 Blancpain S.A. Dynamometrische Vorrichtung zur Anzeige der Drehmomentreserve des Federgehäuses einer Uhr
EP3361324A1 (de) * 2017-02-13 2018-08-15 Rolex Sa Steckverschlusssystem für uhr
CN110083044A (zh) * 2018-01-26 2019-08-02 精工电子有限公司 机芯和钟表
RU2699924C1 (ru) * 2017-11-24 2019-09-11 Бланпэн Са Часовой подвижный узел с однонаправленным зубчатым колесом

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH300362A (fr) * 1952-07-16 1954-07-31 S A Oris Watch Co Mouvement d'horlogerie.
US4015421A (en) * 1975-01-23 1977-04-05 Pforzheimer Uhren-Rohwerke Rudolf Wehmer Mainspring mechanism and spring barrel assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH300362A (fr) * 1952-07-16 1954-07-31 S A Oris Watch Co Mouvement d'horlogerie.
US4015421A (en) * 1975-01-23 1977-04-05 Pforzheimer Uhren-Rohwerke Rudolf Wehmer Mainspring mechanism and spring barrel assembly

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006037367A1 (fr) * 2004-10-09 2006-04-13 Dalton Properties Inc Piece d’horlogerie mecanique ou automatique avec dispositif d’indication de la fiabilite de la chronometrie de la piece
CN102057042A (zh) * 2008-06-06 2011-05-11 诺维信公司 家族44木葡聚糖酶变体
CN102057042B (zh) * 2008-06-06 2014-07-16 诺维信公司 家族44木葡聚糖酶变体
WO2009152972A1 (fr) * 2008-06-18 2009-12-23 La Fabrique Du Temps Mouvement horloger comprenant un variateur de couple et piece d'horlogerie munie d'un tel mouvement
US8356930B2 (en) 2009-12-28 2013-01-22 Blancpain S.A. Dynamometric device for indicating the remaining barrel torque in a timepiece
CN102183884A (zh) * 2009-12-28 2011-09-14 布朗潘有限公司 用于指示钟表中的剩余发条盒力矩的测力装置
JP2011137819A (ja) * 2009-12-28 2011-07-14 Blancpain Sa 時計の香箱残存トルクを指示するための動力測定デバイス
CN102183884B (zh) * 2009-12-28 2013-09-18 布朗潘有限公司 用于指示钟表中的剩余发条盒力矩的测力装置
EP2339410A1 (de) * 2009-12-28 2011-06-29 Blancpain S.A. Dynamometrische Vorrichtung zur Anzeige der Drehmomentreserve des Federgehäuses einer Uhr
EP3361324A1 (de) * 2017-02-13 2018-08-15 Rolex Sa Steckverschlusssystem für uhr
US10890877B2 (en) 2017-02-13 2021-01-12 Rolex Sa Horology pawl system
RU2699924C1 (ru) * 2017-11-24 2019-09-11 Бланпэн Са Часовой подвижный узел с однонаправленным зубчатым колесом
CN110083044A (zh) * 2018-01-26 2019-08-02 精工电子有限公司 机芯和钟表
CN110083044B (zh) * 2018-01-26 2021-10-29 精工电子有限公司 机芯和钟表

Also Published As

Publication number Publication date
EP1136892B1 (de) 2008-10-22
DE60040591D1 (de) 2008-12-04
ATE412204T1 (de) 2008-11-15

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