EP2336832B1 - Échappement à ancre suisse - Google Patents

Échappement à ancre suisse Download PDF

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Publication number
EP2336832B1
EP2336832B1 EP10405219.6A EP10405219A EP2336832B1 EP 2336832 B1 EP2336832 B1 EP 2336832B1 EP 10405219 A EP10405219 A EP 10405219A EP 2336832 B1 EP2336832 B1 EP 2336832B1
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EP
European Patent Office
Prior art keywords
teeth
escapement
pallets
pallet
escape wheel
Prior art date
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Active
Application number
EP10405219.6A
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German (de)
English (en)
French (fr)
Other versions
EP2336832A2 (fr
EP2336832A3 (fr
Inventor
Raphaël Cettour-Baron
Alexandre Chiuve
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.)
Rolex SA
Original Assignee
Rolex SA
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Publication date
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Application filed by Rolex SA filed Critical Rolex SA
Publication of EP2336832A2 publication Critical patent/EP2336832A2/fr
Publication of EP2336832A3 publication Critical patent/EP2336832A3/fr
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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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements

Definitions

  • the present invention relates to a Swiss lever escapement comprising an escapement wheel provided with teeth and an anchor provided on the one hand with an input pallet and an output pallet, in engagement alternately with the teeth of the escape wheel, on the other hand a fork periodically engaged with a pin of a plate secured to the shaft of a regulating balance.
  • the Swiss anchor type escapement is made up of an anchor pivoted around an axis, and an escape wheel integral with an escape pinion.
  • the teeth of the wheel as well as the pallets of the anchor with which they are alternately in contact are the connecting elements between the wheel and the anchor.
  • the dart an appendage located between the horns of the fork at the end of the anchor rod opposite the paddles, prevents any tilting of the anchor while the balance moves freely through an additional arc, until the next passage of the pin of the balance plate between the horns of the fork.
  • the release occurs when the balance makes contact in the fork of the anchor. This release causes a slight retreat of the escape wheel which depends on the angle of pulling of the pallet, this phase therefore consumes energy for the balance.
  • the energy put into play to unlock the anchor corresponds to a security which makes it possible to maintain the anchor in one of its two stable positions.
  • the edge of the anchor wheel tooth is pushed by the torque supplied by the barrel spring through the gear train against the impulse plane of the input pallet, which generates a torque around the pivot axis of the anchor. This torque puts the fork in contact with the pin of the balance plate and begins the transmission of energy to the balance. This is the A pulse.
  • the value of the engagement of the output pallet is called virtual engagement.
  • the phase that follows, called pulling results from the combined action of the force exerted by the tooth of the escape wheel on the pulling face of the pallet and the orientation of this face with respect to the axis d oscillation of the anchor, called the angle of draw.
  • the anchor thus regains its second stable position and marks the end of the entry function.
  • the General Theory of Watchmaking by L. Defossez (1952, The Swiss Chamber of Watchmaking ) details the different types of exhaust, among other things for free lever escapements. While the tooth of the wheel and the anchor each have an impulse plane, the escapement has a split impulse surface, the typical representative of which is the Swiss lever escapement. The split impulse surface escapement is clearly the most reliable for a wristwatch. In all the cases mentioned by L. Defossez, the impulse planes of the anchor vanes are longer than those of the escape wheel teeth.
  • the arc occupied by the pallets, in particular by the exit pallet Ls is> 6.5 °
  • the ratio between the angles described by the exit and entry pallets Ls, Le and one of the teeth d of the escape wheel corresponds to Ls / d> 2.5.
  • the object of the present invention is to improve the efficiency of a Swiss lever escapement, including compared to the solutions recommended by the state of the art.
  • this invention relates to a Swiss lever escapement according to claim 1.
  • the relative decrease in the width of the pallet is accompanied by the increase in the width of the tooth of the escape wheel to keep the same angular energy transmission sector and to exploit it to the maximum.
  • the pulse A when the edge of the tooth moves on the pulse plane of the pallet by exerting a thrust and the pulse B when the plane of momentum of the tooth moves relative to the edge of the pallet by exerting a thrust.
  • the figure 3 illustrates this dependence well. It can be seen that the fact of using small width pallets (length of the pulse plane less than 200 ⁇ m) makes it possible to obtain a better efficiency than that given in the US3628327 (49% against more than 51% in this case).
  • the number of teeth of the escape wheel has little influence on the performance of the exhaust, and can vary over a wide range (for example, between 16 and 30 teeth).
  • the angle formed by the line of centers (lines connecting the centers of the axes of the balance, of the anchor and of the anchor wheel) has no significant influence on the performance of the exhaust.
  • the ratio between the angle of lift of the balance and that of the anchor is situated in the case of the present invention between 3.7 and 7, preferably at 4.5.
  • the figure 5 shows an embodiment of a Swiss lever escapement according to the present invention. Its parameters correspond to reference 2 in Table 2 below.
  • This exhaust has a 24 tooth escape wheel.
  • the anchor is made by the Liga process in Ni with 0.125 mm thick paddles made in a classic way in ruby. For the wheel, two configurations are tested, a first in Ni with a board of 0.13 mm and a second in Si with a board of 0.15 mm. It is obvious that other materials can be used, for the anchor, the anchor paddles and the wheel. In particular, the anchor can be made in one piece with integrated pallets.
  • the figure 1 shows a Swiss lever escapement in a standard 20-tooth configuration, which serves as a basis for comparison. Its parameters correspond to reference 3 in Table 2.
  • the model used to calculate the values recorded in table 2 allows to predict an increase in efficiency of about 10% for the Ni solution and about 11% for the reduced Si version.
  • Table 1 below gives an overview of the amplitudes measured for the two configurations and the control escapement (standard Swiss anchor with an anchor wheel made of Ni).
  • the amplitudes given below are averages carried out on at least five parts, the standard deviation on these averages being typically 5 °.
  • ⁇ /b> Reference number table 2 Measured amplitude [°]
  • the relative width Lpl of each of the pallets is advantageously ⁇ 45%.
  • the ratio of the arc length Ls, Le of one of the output or input vanes to the arc length d of one of the teeth of the escape wheel is preferably less than 1.
  • La length of the pulse plane La of one of said pallets is advantageously less than 200 ⁇ m.
  • the ratio between the length of the impulse plane Lg of one of the teeth of the escape wheel and the length of the impulse plane La of one of the vanes is preferably greater than 1.5.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
  • Vibration Dampers (AREA)
  • Transmission Devices (AREA)
  • Handcart (AREA)
EP10405219.6A 2009-12-21 2010-11-12 Échappement à ancre suisse Active EP2336832B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH19592009 2009-12-21

Publications (3)

Publication Number Publication Date
EP2336832A2 EP2336832A2 (fr) 2011-06-22
EP2336832A3 EP2336832A3 (fr) 2018-01-10
EP2336832B1 true EP2336832B1 (fr) 2020-12-02

Family

ID=43856028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10405219.6A Active EP2336832B1 (fr) 2009-12-21 2010-11-12 Échappement à ancre suisse

Country Status (4)

Country Link
US (1) US8529122B2 (ja)
EP (1) EP2336832B1 (ja)
JP (1) JP5859197B2 (ja)
CN (1) CN102103357B (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2413202B1 (fr) * 2010-07-30 2017-11-15 ETA SA Manufacture Horlogère Suisse Procédé d'amélioration de tenue à l'usure et aux chocs d'un composant de mouvement d'horlogerie. Ancre pour mouvement d'horlogerie résistante à l'usure et aux chocs
JP5891076B2 (ja) * 2012-03-09 2016-03-22 セイコーインスツル株式会社 がんぎ歯、該がんぎ歯を備えたがんぎ車、アンクル脱進器、ムーブメント、並びに機械式時計及びトルク伝達方法
CH706532B1 (fr) * 2012-11-26 2013-11-29 Detra Sa Zi Echappement à ancre pour pièce d'horlogerie.
CH707471B1 (fr) 2013-08-05 2014-07-31 Rd Engineering Rudolf Dinger Système régulateur pour montre mécanique.
EP2871535B1 (fr) * 2013-11-06 2017-06-28 ETA SA Manufacture Horlogère Suisse Ancre d'horlogerie à cornes optimisées
EP2952971B1 (fr) * 2014-06-05 2016-10-12 Nivarox-FAR S.A. Ancre pour mécanisme d'échappement d'un mouvement de montre
CH713143A1 (fr) * 2016-11-17 2018-05-31 Richemont Int Sa Échappement pour pièce d'horlogerie.
JP7103041B2 (ja) * 2018-08-03 2022-07-20 セイコーエプソン株式会社 アンクル、ムーブメント、時計
EP4148505A1 (fr) 2021-09-08 2023-03-15 Rolex Sa Module horloger

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628327A (en) 1969-04-14 1971-12-21 Suwa Seikosha Kk Clubtooth lever escapement

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH731A (fr) * 1889-03-13 1889-06-24 Calame Louis Camille Echappement à ancre perfectionné, muni de levées ayant la forme de cylindres droits, dont les axes sont placés dans le même plan que celui de la roue
US1044054A (en) * 1912-01-24 1912-11-12 Paul E Jeanmairet Escapement-wheel.
US3538705A (en) * 1968-11-07 1970-11-10 Hamilton Watch Co Escapement
US3803830A (en) * 1972-06-29 1974-04-16 Bunker Ramo Plastic escapement lever
US4041693A (en) * 1972-09-01 1977-08-16 Les Fabriques D'assortiments Reunies Escapement for a timepiece
JP4607966B2 (ja) * 2004-10-26 2011-01-05 エルヴェーエムアッシュ スイス マニュファクチュール エスアー 腕時計用の調速機構、及び、当該調速機構を有する機械式ムーブメント
JP4894051B2 (ja) * 2005-07-04 2012-03-07 モントレ ブレゲ エスエー 高性能のレバー脱進機構
EP1892589B1 (fr) 2006-08-23 2012-09-05 Patek Philippe SA Genève Echappement à ancre suisse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628327A (en) 1969-04-14 1971-12-21 Suwa Seikosha Kk Clubtooth lever escapement

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
"Die Hemmungen", AUSZÜGEN
"It's about time", AUSZÜGEN
HENRY B. FRIED: "The Watch Escapement", 1959, BOOK CRAFTSMEN ASSOCIATES, INC., USA, ISBN: 0317170864, pages: 10 - 19 *
MERKMALSKOMBINATION
THE WATCH ESCAPEMENT

Also Published As

Publication number Publication date
EP2336832A2 (fr) 2011-06-22
CN102103357A (zh) 2011-06-22
CN102103357B (zh) 2016-01-20
JP5859197B2 (ja) 2016-02-10
US8529122B2 (en) 2013-09-10
US20110149696A1 (en) 2011-06-23
JP2011128153A (ja) 2011-06-30
EP2336832A3 (fr) 2018-01-10

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