US3538705A - Escapement - Google Patents

Escapement Download PDF

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Publication number
US3538705A
US3538705A US774123A US3538705DA US3538705A US 3538705 A US3538705 A US 3538705A US 774123 A US774123 A US 774123A US 3538705D A US3538705D A US 3538705DA US 3538705 A US3538705 A US 3538705A
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US
United States
Prior art keywords
pallet
impulse
escapement
escape wheel
wheel
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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
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US774123A
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English (en)
Inventor
Malcolm R Perry
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.)
Hamilton Watch Co
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Hamilton Watch Co
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Publication date
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Publication of US3538705A publication Critical patent/US3538705A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1502—Escapement

Definitions

  • the locking and impulse surfaces on the pallet, as well as on the escape wheel teeth, are formed with corner radii.
  • the present escapement provides for an effective deep lock. of about 3, a drop of about 4, neutral draw, and high impulse energy near the zero beat position, to improve self-starting characteristics, minimize input torque motions sensitivity and substantially eliminate the possibility of setting or locking on an impulse surface.
  • the present invention relates to an escapement for clockwork and watch mechanisms and particularly relates to an improved escapement formed to accept broad manufacturing tolerances and having corner radii on the cooperating surfaces of the escapement as well as other features.
  • the present escapement includes a pallet and an escape wheel which are formed to accept broad or liberal tolerances and yet satisfactorily and reliably perform their intended timekeeping function.
  • Unique functional features discussed below such as, for example, neutral draw, a deep lock, minimum input torque sensitivity, impulse areas in shapes calculated to provide high impulse near the zero beat position, etc., are provided the present escapement making it possible to accept such liberal manufacturing tolerances, whereby the escapement may be manufactured for less cost, adjustment of its parts, jobbing, etc, as compared with conventional escapements.
  • the parts of the present invention can be readily manufactured.
  • the completed and assembled escapement can function as a high precision timekeeping mechanism within a predetermined accuracy.
  • One unique aspect of the present escapement provides for the formation of corner radii between adjoining locking and impulse surfaces on the pallet stones and escape wheel teeth.
  • corner radii By designing the escapement with such corner radii, liberal tolerances can be assigned making it possible to permit the formation of the pallet and escape wheel solely by a stamping operation or other manufacturing techniques such as injection molding, aluminum die casting, and the like, wherein the usual extremely close tolerances required in conventional escapements cannot be obtained.
  • the provision of corner radii also permits the formation of a flat pallet and escape wheel.
  • Another unique aspect of the present escapement provides for neutral draw.
  • the usual backing-up action of the escape wheel and often the gear train unlocking the pallet in conventional escapements is eliminated.
  • the energy dissipation which normally occurs when the pallet is unocked is thus completely eliminated.
  • the elimination of draw facilitates self-starting, provides for less input torque sensitivity and permits a deeper lock, i.e., the escapement is less lock sensitive.
  • a further feature hereof provides for improvement'of the self-starting characteristics of the timepiece as well as minimizing the possibility of setting or locking on an impulse surface.
  • the balance wheel hairspring is set to provide no force at the zero beat position and the pallet and balance are formed to provide a high balance wheel to pallet angular displacement ratio.
  • the force of the hairspring in returning the balance to the zero beat position is significantly greater than in conventional escapements thereby facilitating unlocking of the pallet.
  • the possibility of setting on an impulse face is substantially decreased.
  • the impulse and locking surfaces of the pallet stones and escape wheel teeth are shaped to provide maximum impulse energy to the balance near the zero beat position.
  • the ratio of angular displacement of the pallet and the escape wheel when the pallet passes through the zero beat position is about 1:1 whereas the escape wheel rotates about 2 for every degree of rotation of the pallet during the latter half of the impulse period.
  • the higher mechanical advantage of the escape Wheel near the zero beat position of the pallet thus increases the self-starting characteristics of the present escapement and avoids setting on impulse surfaces.
  • FIG. 1 is a plan view of an escapement constructed in accordance with the present invention
  • FIGS. 2a-2d are reduced plan views of the escapement illustrating a complete cycle of operation
  • FIGS. 3 and 4 are fragmentary enlarged plan views respectively illustrating the pallet arms in locked position with the teeth of the index wheel;
  • FIG. 5 is a graph illustrating pallet displacement as a function of scape wheel rotation
  • FIG. 6 is a side elevational view of the escapement illustrated in FIG. 1;
  • FIGS. 7-8 are fragmentary enlarged plan views of the pallet arms and index wheel teeth.
  • FIGS. 9-10 are enlarged fragmentary plan views of another form of pallet arm surfaces.
  • FIGS. 1 and 6 there is shown an escapement comprising a pallet and an escape wheel 10 and 12, respectively, which form an integral part of a timepiece or watch mchanism.
  • Pallet 10 is mounted on a pallet staff 14 pivotally carried by base plates, one of which is shown at 15 (FIG. 6), mounted in a timekeeping mechanism and escape wheel 12 is mounted on a staff 13 pivotally car- 4 movement of pallet 10 about staff 14.
  • Index wheel 12 is geared to the gear train of the timepiece or watch in the usual manner.
  • a balance assembly generally indicated at 26 cooperates with the pallet 10 to oscillate the latter about axis 14 and comprises a balance staif 28 carrying an indexing roller 30 mounting a depending roller pin 32.
  • Balance staff 28 is suitably drivingly connected in the usual manner to a balance wheel and hairspring assembly, not shown, whereby roller pin 32 oscillates about the axis of staff 28.
  • a guard roller 34 having a recess 36 formed in the periphery thereof is also carried by staff 28 and cooperates with a guard pin 38 carried on pallet 10 to prevent overbanking. It will thus be seen that roller pin 32 releasably engages within recess 22 to oscillate pallet 10 about pivot 14, the oscillatory excursion in either direction being arrested by the engagement of pallet 10 against respective banking pins 10.
  • FIG. 2a the escape wheel and pallet are illustrated in the Zero beat position with no torque applied to escape wheel 12.
  • impulse surface 201 of an escape wheel tooth 20 engages the impulse surface 18I of pallet arm 18.
  • the impulse surface 201 of the engaged tooth 20 cooperates with impulse surface 181 on pallet arm 18 to drive pallet 10 in a clockwise direction against a banking pin 40 as illustrated in FIG. 2b.
  • the impulse provided pallet 10 by index wheel 12 drives and pivots roller pin 32 out of engagement in recess 22 in a counterclockwise direction against the bias of the hairspring, not shown. It will be noted that, when pallet 10 is impulsed against banking pin 40, the impulse tooth 20 rotates beyond and clears pallet arm 18 and, with continued torque applied to index wheel 12 by the mainspring or other energy source of the timepiece as indicated at 10, the index wheel 12 rotates until the locking surface 20L of an index wheel tooth 20 engages the locking surface 16L of pallet arm 16 whereby further rotation of index wheel 12 is restrained.
  • the hairspring drives roller pin 32 in the opposite clockwise direction to engage in recess 22 and pivot pallet 10 in a counterclockwise direction as illustrated in FIG. 2c.
  • the locking surface 16L is withdrawn from engagement with the locking surface 20L on the index wheel tooth 20 such that the impulse surface 201 on tooth 20 engages the impulse surface 161 of pallet arm 16.
  • the continued torque applied to index wheel 12 as well as the continued oscillatory clockwise excursion of roller pin 32 pivots pallet 10 to the opposite banked position illustrated in FIG. 2d.
  • Balance assembly 26 is also impulsed by pallet 10 such that roller pin 32 continues on its clockwise oscillatory excursion against the bias of the hairspring, not shown. It will be noted that the pivoting action of pallet 10 past its center position perm-its the impulse tooth 20 to advance beyond and clear pallet arm 16 with rotational movement of index wheel 12 then being restrained (FIG. 2d) by the engagement of the locking surface 20L of a next index wheel tooth 20 against the locking surface 18L of pallet arm 18. Upon completion of the clockwise oscillatory excursion of roller table 39, roller pin 32 returns on its counterclockwise excursion to engage in recess 22 and pivot pallet 10 clockwise.
  • the impulse surface 201 of tooth 20 thus engages the impulse surface 181 of pallet arm 18 to impulse pallet 10 and balance assembly 26 thereby displacing the pallet and the balance assembly to the position illustrated in FIG. 2b. This cyclic movement is repeated for so long as torque is applied to escape wheel 12.
  • the pallet and escape wheel and 12, respectively are formed to accept broader tolerances in the manufacture thereof than heretofore accomplished and that the present escapement has excellent performance and reliability characteristics contrary to that which might normally be expected with such broader tolerances.
  • conventional clock and timer escapements are tolerated at .0002 to .0005.
  • This conventional design criteria therefore requires precision manufacture of the parts forming the escapement.
  • all prior escapements are high precision mechanisms designed for sharp corners on the cooperating pallet arms and index wheel teeth and have close tolerances on the order of those mentioned above.
  • the forming and machining operations such as the bending, cutting and/or milling operations nec essary to achieve such close tolerances are, of course, time consuming and expensive.
  • the present escapement is formed to accept broader tolerances on the order of .005 to .0020. This provides a less tolerance sensitive escapement than is conventional and one which can be readily and easily manufactured at less cost and adjustment as well as other features to be described.
  • the pallet and escape wheel are formed fiat. That is, the teeth on escape wheel 12 and the pallet arms 16 and 18 including their respective locking and impulse surfaces lie wholly within the corresponding planes of index wheel 12 and pallet 10.
  • Pallet 10 and index wheel 12 are preferably stamped from sheet metal, for example, stainless steel, and assembled in operative relation one to the other without additional manufacture.
  • the formation of the pallet and index wheel are complementary one to the other and tha a flat pallet formed in accordance with the above-noted criteria would be ineffective if employed with an index wheel formed employing usual design criteria.
  • an index Wheel formed in accordance with the present invention would also be ineffective if employed with a pallet formed in a conventional manner.
  • the pallet and escape wheel can be formed flat by other manufacturing operations.
  • the parts of the present escapement may be manufactured to the required semi-precision by injection molding, aluminum die casting, powder metallurgy or the like.
  • guard pin 38 is preferably staked to pallet 10 although it could be formed as an integral part thereof when employing any of the manufacturing processes noted above.
  • the present escapement provides for corner radii on the pallet arms or stones and escape wheel teeth.
  • corner radii the corners between the locking and impulse surfaces 16L, 18L and 1 61, 18L respectively, and between the impulse surfaces 16I, 181 and leading edges 16E, 18E, respectively, have radii by design in contradistinction to the normally provided sharp or pointed corners on conventional escapements of this type.
  • the pallet and escape wheel may be manufactured flat and by a sheet metal stamping operation. Additionally, punch and die life are increased.
  • the pallet stone and index wheel teeth are shaped to compensate for corner radii to provide optimum performance characteristics such as improved self-starting characteristics, neutral draw, minimum input torque sensitivity, high impulse energy near the zero beat position, and others discussed hereinafter.
  • FIGS. 7 and 8 there is shown straight line impulse surfaces 161 and 18I and in FIGS. 9-10, while is illustrated cam type impulse scrfaces 161C and 181C.
  • Both straight and cam impulse surfaces are designed to provide greater energy during the initial impulse period and less energy during the latter part of the period to provide less input torque motion sensitivity and decrease the possibility of setting on impulse surfaces as hereinafter more fully described.
  • the employment of one or the other depends on the degree of performance (accuracy, self-starting) that is desired and it will be noted that the cam impulse surfaces are defined by combined arcuate and straight edges.
  • the index Wheel 12 has 12 equally-spaced teeth, radii of .1825 and .1888 inch at points 1 and 2, respectively, a tooth width of .0195 inch at 3, and corner radii of .0020 inch.
  • the locking surfaces 20L of the teeth lie on radii of the wheel 12.
  • the wheel is preferably formed of stainless steel with the locking and impulse surfaces having a number 16 polish.
  • the center to center distance of the balance to pallet staffs and the pallet staff to the index wheel staff is .3500 and .2300 inch, respectively, with lines extending from the balance and index wheel axes through the pivot axis of the pallet forming a right angle.
  • the following tables provide dimensions in X and Y directions as seen in FIG. 1 of the numbered positions of the pallet arms 16 and 18 (FIGS. 710) from a reference coincident with the axis of pallet 10, the reference point having an X and Y value of 2.000.
  • the present escapement is characterized by improved self-starting characteristics.
  • a high balancepallet angular displacement ratio is employed. Since the hairspring can thus store more energy for the same pallet displacement than would otherwise be the case, unlocking of the escapement is greatly facilitated.
  • the ratio of the total displacement of the balance wheel while engaged with the pallet to the total displacement of the pallet is about 4.2.
  • the balance wheel With the hairspring on the balance wheel set to provide no force at the zero beat position, the balance wheel will zero beat itself after power has been removed.
  • one or the other of the impulse surfaces 161 or 181 is always aligned with an escape wheel tooth impulse surface 201 thus avoiding alignment of the pallet and escape wheel in a locked condition.
  • pallet stones 16 and 18 and escape wheel teeth 20 are shaped such that the force applied by the escape wheel tooth is very nearly normal to the pallet impulse surfaces at the Zero beat position of the pallet thereby further improving the self-starting characteristics of the present escapement.
  • This high impulse energy near the zero beat position improves the self-starting characteristics hereof by providing a sulfcient initial impulse to the pallet and hence to the balance assembly when the escapement is in the rest position to insure unlocking of theescapement and avoid the possibility of setting on an impulse surface.
  • draw that is, the force of an escape wheel tooth on the pallet stone locking surface which would normally pull the stone deeper into the escape wheel or conversely the force conventionally required to back up a gear train in order to unlock the pallet.
  • draw that is, the force of an escape wheel tooth on the pallet stone locking surface which would normally pull the stone deeper into the escape wheel or conversely the force conventionally required to back up a gear train in order to unlock the pallet.
  • draw also provides for a deeper lock. While conventional escapements have a 1 lock, the effective lock angle of the present escapement is 3". To be locked, the pallet must be displaced from zero to 3 or more.
  • An escapement for a timekeeping mechanism comprising a pallet mounted for oscillatory movement and having a pair of pallet arms, each of said arms having integral impulse and locking surfaces, means for oscillating said pallet, an escape wheel carrying a plurality of teeth, each of said teeth having impulse and locking surfaces cooperatively engageable with corresponding surfaces carried by said pallet arms, means for imparting a torque to said escape wheel, the impulse and locking surfaces of each of the pallet arms and escape wheel teeth being angularly related one to the other with a corner radius therebetween, said corresponding surfaces cooperating to provide unidirectional rotary motion of said escape wheel in response to oscillatory movement of said pallet.
  • An escapement for a timekeeping mechanism comprising a pallet mounted for oscillatory movement and having a pair of pallet arms, means for oscillating said pallet, an escape wheel carrying a plurality of teeth cooperatively engageable with said pallet arms, and means for imparting a torque to said escape wheel, the cooperating surfaces of the pallet arms and escape wheel teeth providing unidirectional rotary motion to said escape Wheel in response tooscillatory movement of said pallet, said pallet including said arms and said escape wheel including said teeth being formed flat and lying in coplanar relation one with the other.
  • An escapement for a timekeeping mechanism comprising a pallet mounted for oscillatory movement and having a pair of pallet arms, means for oscillating said pallet, an escape wheel carrying a plurality of teeth cooperatively engageable with said pallet arms, means for imparting a torque to said escape wheel, the cooperating surfaces of the pallet arms and escape wheel teeth each including angularly related surfaces having a corner radius therebetween and providing uni-directional rotary motion of said escape wheel in response to oscillatory movement of said pallet, at least major portions of said pallet and escape wheel including their respective pallet arms and teeth lying in co-planar relation one with the other.
  • An escapement for a timekeeping mechanism comprising a pallet mounted for oscillatory movement and having a pair of pallet arms, means for oscillating said pallet, an escape wheel carrying a plurality of teeth cooperatively engageable with said pallet arms, means for imparting a torque to said escape wheel, the cooperating surfaces of the pallet arms and escape wheel teeth each including angularly related surfaces having a corner radius therebetween and providing uni-directional rotary motion of said escape wheel in response to oscillatory movement of said pallet, at least a major portion of the pallet including the pallet arms lying in a single common plane, the angularly related surfaces of said pallet arms comprising impulse and locking surfaces extending in next adjacent angular relation one to the other, each pallet arm having a third surface extending in said plane at an angle and next adjacent to the associated impulse surface, said third surface and impulse surfaces having a radius therebetween.
  • An escapement for a timekeeping mechanism comprising a pallet mounted for oscillatory movement and having a pair of pallet arms, means for oscillating said pallet, an escape wheel carrying a plurality of teeth cooperatively engageable with said pallet arms, means for imparting a torque to said escape wheel, the cooperating surfaces of the pallet arms and escape wheel teeth each including angularly related surfaces having a corner radius therebetween and permitting uni-directional rotary motion of said escape wheel in response to oscillatory movement of said pallet, both said pallet and said escape wheel 10 lying in a single common plane, each of said pallet arms and said escape wheel teeth having adjacent locking, impulse and third surfaces extending in angular relation one to the other, said arms and said teeth having corner radii disposed between said adjacent surfaces.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gears, Cams (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
US774123A 1968-11-07 1968-11-07 Escapement Expired - Lifetime US3538705A (en)

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US77412368A 1968-11-07 1968-11-07

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US3538705A true US3538705A (en) 1970-11-10

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US (1) US3538705A (fr)
CH (1) CH1661869A4 (fr)
DE (1) DE1956207A1 (fr)
FR (1) FR2024811A1 (fr)
GB (1) GB1287795A (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050122848A1 (en) * 2003-12-04 2005-06-09 Montres Breguet S.A. Detent escapement for a timepiece
US20050122847A1 (en) * 2003-12-04 2005-06-09 Montres Breguet Sa Detent escapement for timepiece
US20050128880A1 (en) * 2003-12-16 2005-06-16 Montres Breguet S.A. Detent escapement for timepiece
EP1596260A1 (fr) * 2004-05-11 2005-11-16 Watch-U-License AG Procédé de réalisation d'une roue dentée
US7097350B1 (en) * 2005-03-30 2006-08-29 Montres Breguet Sa Detent escapement for timepiece
US20060221774A1 (en) * 2005-03-30 2006-10-05 Montres Breguet S.A. Detent escapement for timepiece
US20080008051A1 (en) * 2006-06-23 2008-01-10 Omega S.A. Mobile micromechanical element with shock controlled rotation
US20080279052A1 (en) * 2005-04-06 2008-11-13 Rolex S.A. Watch Escapement
US20100214881A1 (en) * 2009-02-26 2010-08-26 Rolex S.A Direct-impulse escapement, especially of detent type, for a horological movement
CN102103357A (zh) * 2009-12-21 2011-06-22 劳力士有限公司 瑞士杠杆擒纵机构
CN103309224A (zh) * 2012-03-09 2013-09-18 精工电子有限公司 擒纵齿、具备该擒纵齿的擒纵轮、锚形擒纵器、机芯以及机械式钟表和转矩传递方法
US8579498B2 (en) * 2009-11-25 2013-11-12 Sergio Ferrara High efficiency escapement
CN104364719A (zh) * 2012-06-07 2015-02-18 迪特拉有限公司 用于计时器的擒纵装置
US9164483B2 (en) * 2011-12-21 2015-10-20 Vaucher Manufacture Fleurier S.A. Escapement mechanism
CN109997084A (zh) * 2016-11-17 2019-07-09 里什蒙国际公司 用于钟表的具有优化的扭矩传递的擒纵机构
US20240192640A1 (en) * 2022-12-08 2024-06-13 Eta Sa Manufacture Horlogère Suisse Self-starting profile for timepiece escapement
EP4498173A1 (fr) * 2023-07-28 2025-01-29 Flexous Mechanisms IP B.V. Montre mécanique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6210535B2 (ja) * 2013-07-25 2017-10-11 セイコーインスツル株式会社 脱進機、時計用ムーブメントおよび時計
EP4194959B1 (fr) * 2021-12-09 2025-09-17 Montres Breguet S.A. Echappement naturel pour mouvement d'horlogerie et mouvement d'horlogerie comprenant un tel echappement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979028A (en) * 1932-10-20 1934-10-30 Teleregister Corp Pawl and ratchet mechanism
US3017742A (en) * 1958-07-28 1962-01-23 Joseph A Reinhardt Escapement for a time rate mechanism
FR1473355A (fr) * 1966-02-19 1967-03-17 Citizen Watch Co Ltd Mécanisme d'échappement et montres ou appareils similaires équipés de ce mécanisme
US3425212A (en) * 1967-05-12 1969-02-04 Gen Time Corp Quiet clockwork escapement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979028A (en) * 1932-10-20 1934-10-30 Teleregister Corp Pawl and ratchet mechanism
US3017742A (en) * 1958-07-28 1962-01-23 Joseph A Reinhardt Escapement for a time rate mechanism
FR1473355A (fr) * 1966-02-19 1967-03-17 Citizen Watch Co Ltd Mécanisme d'échappement et montres ou appareils similaires équipés de ce mécanisme
US3425212A (en) * 1967-05-12 1969-02-04 Gen Time Corp Quiet clockwork escapement

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050122847A1 (en) * 2003-12-04 2005-06-09 Montres Breguet Sa Detent escapement for timepiece
US6942378B2 (en) * 2003-12-04 2005-09-13 Montres Breguet Sa Detent escapement for timepiece
US7040803B2 (en) * 2003-12-04 2006-05-09 Montres Breguet Sa Detent escapement for a timepiece
US20050122848A1 (en) * 2003-12-04 2005-06-09 Montres Breguet S.A. Detent escapement for a timepiece
US7192180B2 (en) * 2003-12-16 2007-03-20 Montres Breguet S.A. Detent escapement for timepiece
US20050128880A1 (en) * 2003-12-16 2005-06-16 Montres Breguet S.A. Detent escapement for timepiece
EP1596260A1 (fr) * 2004-05-11 2005-11-16 Watch-U-License AG Procédé de réalisation d'une roue dentée
US7097350B1 (en) * 2005-03-30 2006-08-29 Montres Breguet Sa Detent escapement for timepiece
US20060221774A1 (en) * 2005-03-30 2006-10-05 Montres Breguet S.A. Detent escapement for timepiece
US7494268B2 (en) * 2005-03-30 2009-02-24 Montres Brequet Sa Detent escapement for timepiece
US20080279052A1 (en) * 2005-04-06 2008-11-13 Rolex S.A. Watch Escapement
US7686503B2 (en) * 2005-04-06 2010-03-30 Rolex S.A. Watch escapement
US20080008051A1 (en) * 2006-06-23 2008-01-10 Omega S.A. Mobile micromechanical element with shock controlled rotation
US7708454B2 (en) 2006-06-23 2010-05-04 Omega S.A. Mobile micromechanical element with shock controlled rotation
US20100214881A1 (en) * 2009-02-26 2010-08-26 Rolex S.A Direct-impulse escapement, especially of detent type, for a horological movement
US8087819B2 (en) * 2009-02-26 2012-01-03 Rolex S.A. Direct-impulse escapement, especially of detent type, for a horological movement
US8579498B2 (en) * 2009-11-25 2013-11-12 Sergio Ferrara High efficiency escapement
CN102103357B (zh) * 2009-12-21 2016-01-20 劳力士有限公司 瑞士杠杆擒纵机构
CN102103357A (zh) * 2009-12-21 2011-06-22 劳力士有限公司 瑞士杠杆擒纵机构
US9164483B2 (en) * 2011-12-21 2015-10-20 Vaucher Manufacture Fleurier S.A. Escapement mechanism
JP2013186078A (ja) * 2012-03-09 2013-09-19 Seiko Instruments Inc 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
CN103309224A (zh) * 2012-03-09 2013-09-18 精工电子有限公司 擒纵齿、具备该擒纵齿的擒纵轮、锚形擒纵器、机芯以及机械式钟表和转矩传递方法
CN104364719A (zh) * 2012-06-07 2015-02-18 迪特拉有限公司 用于计时器的擒纵装置
CN104364719B (zh) * 2012-06-07 2017-03-15 迪特拉有限公司 用于计时器的擒纵装置
CN109997084A (zh) * 2016-11-17 2019-07-09 里什蒙国际公司 用于钟表的具有优化的扭矩传递的擒纵机构
CN109997084B (zh) * 2016-11-17 2021-03-12 里什蒙国际公司 用于钟表的具有优化的扭矩传递的擒纵机构
US20240192640A1 (en) * 2022-12-08 2024-06-13 Eta Sa Manufacture Horlogère Suisse Self-starting profile for timepiece escapement
EP4498173A1 (fr) * 2023-07-28 2025-01-29 Flexous Mechanisms IP B.V. Montre mécanique

Also Published As

Publication number Publication date
GB1287795A (en) 1972-09-06
CH1661869A4 (fr) 1971-11-30
DE1956207A1 (de) 1970-08-27
FR2024811A1 (fr) 1970-09-04

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