EP4530756A1 - Uhreinstellorgan mit verbessertem rückersystem - Google Patents

Uhreinstellorgan mit verbessertem rückersystem Download PDF

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Publication number
EP4530756A1
EP4530756A1 EP23199680.2A EP23199680A EP4530756A1 EP 4530756 A1 EP4530756 A1 EP 4530756A1 EP 23199680 A EP23199680 A EP 23199680A EP 4530756 A1 EP4530756 A1 EP 4530756A1
Authority
EP
European Patent Office
Prior art keywords
stud
balance
regulating member
holder
hairspring
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.)
Pending
Application number
EP23199680.2A
Other languages
English (en)
French (fr)
Inventor
Julien Christan
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP23199680.2A priority Critical patent/EP4530756A1/de
Priority to US18/819,297 priority patent/US20250103006A1/en
Priority to KR1020240119149A priority patent/KR20250046177A/ko
Priority to JP2024151930A priority patent/JP2025056727A/ja
Priority to CN202411314135.5A priority patent/CN119717469A/zh
Priority to CN202422296919.1U priority patent/CN223180573U/zh
Publication of EP4530756A1 publication Critical patent/EP4530756A1/de
Pending 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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/04—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat
    • G04B18/06—Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat by setting the collet or the stud of a hairspring
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/066—Manufacture of the spiral spring
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/325—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring in a fixed position, e.g. using a block
    • 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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/02—Regulator or adjustment devices; Indexing devices, e.g. raquettes
    • G04B18/026—Locking the hair spring in the indexing device, e.g. goupille of the raquette

Definitions

  • the invention relates to the field of watchmaking, and more particularly to the field of mechanical watchmaking, where the regulation of the driving energy is provided by a regulating organ.
  • the invention relates, more specifically, to a regulating organ provided with a precision index system, a watch movement comprising such a regulating organ, as well as a timepiece comprising such a watch movement.
  • the energy required to rotate the hands (e.g., the minute and hour hands) is stored in a barrel and then delivered by a balance-spring system, which includes a flywheel called a balance wheel, combined with a spring in the form of a spiral-wound ribbon called a balance spring.
  • a balance-spring system which includes a flywheel called a balance wheel, combined with a spring in the form of a spiral-wound ribbon called a balance spring.
  • the balance spring is fixed to a shaft which rotates with the balance wheel; at one external end, the balance spring is fixed to a stud mounted on a stud holder which is itself fixed to a fixed bridge (or balance cock).
  • the balance wheel's rotation is maintained - and its oscillations counted - by an escapement mechanism comprising an anchor driven by a low-amplitude oscillating movement, equipped with two pallets which engage the teeth of an escape wheel.
  • the escape wheel is imposed a step-by-step rotational movement whose frequency is determined by the oscillation frequency of the anchor, itself set to the oscillation frequency of the sprung balance.
  • the oscillation frequency is about 4 Hz, or about 28,800 vibrations per hour (A/h).
  • One objective of good watchmakers is to ensure isochronism and regularity of oscillations (or constancy of the rate) of the balance.
  • this index system is fixed in rotation relative to the balance spring axis.
  • the assembly comprising the bridge, the index system, the key, the stud holder, the stud, the shaft, the spring and the balance wheel is commonly referred to as the "regulating organ".
  • regulating organs are provided by the European patent EP3304215 and by the European patent EP2876504 , both in the name of the watch manufacturer ETA.
  • the stops are adjustable to tighten the hairspring to eliminate play, especially during operation of the hairspring.
  • the rate is first adjusted by moving the index key, then the hairspring is tightened with the key. But tightening the hairspring with the index key risks constraining it, and creating timekeeping defects, particularly by off-centering of the coils.
  • removing play also modifies the rate, and once the hairspring is tightened, we do not can no longer move the racket key along the hairspring to finish finely adjusting the rate.
  • hairsprings have an integrated adjustment device.
  • the rate is not adjusted by changing the effective length of the hairspring, but by applying a force or torque to an elastic element arranged in series with the hairspring. This allows the stiffness of the elastic element and therefore of the hairspring as a whole to be changed. By adjusting the stiffness of the hairspring, the rate of the regulating member can be adjusted.
  • Such a hairspring with an elastic element is, for example, described in the patent application EP4009115 .
  • the aim of the present invention is to overcome all or part of the drawbacks mentioned above by proposing a racket system compatible with this type of adjustment device.
  • the invention relates to a regulating organ for a watch movement comprising an inertial mass, for example a balance, a hairspring, a balance bridge, and an index system for adjusting the rate of the regulating organ, the index system comprising a stud holder comprising a first stud on which the hairspring is mounted.
  • the invention is remarkable in that the balance bridge has a second stud on which the balance spring is also mounted, the stud holder being movable in rotation relative to the balance bridge to adjust the rate of the regulating organ.
  • the rate of the regulating organ can be adjusted simply by changing the position of the stud holder, because this changes the position of the first stud relative to the second stud, which remains fixed relative to the plate.
  • the balance spring is carried by both studs, the stiffness of the balance spring is modified. Since the position of the second stud is not changed, the reference mark remains unchanged.
  • the index system comprises a return spring exerting a separation force between the stud holder and the balance bridge.
  • the stud holder and the spring are in one piece, preferably formed from the same material.
  • the racket system comprises a rotating movable cam, the cam cooperating with the piton holder to rotate it.
  • the piton holder comprises an arm in contact with the cam to be able to rotate the piton holder.
  • the spiral spring comprises a wound ribbon and means for adjusting the stiffness of the spiral spring provided with an elastic element arranged in series with the wound ribbon, the second stud being mechanically linked to the elastic element.
  • the flexible element is connected to a rigid support, the second stud being integral with the rigid support.
  • the adjustment means comprise pre-stressing means for applying a variable force or torque to the flexible element, the first stud being mechanically linked to the pre-stressing means.
  • the elastic element and the prestressing means are arranged between the first stud and the second stud, the first stud being movable relative to the second stud to actuate the prestressing means, the movement of the first stud relative to the second stud modifying the stiffness of the spiral spring.
  • the prestressing means comprise a lever connected to the flexible element, the first stud being integral with a free end of the lever.
  • the prestressing means comprise a rigid structure arranged in parallel with the flexible element, the lever being connected to the rigid structure.
  • the flexible element is connected to a rigid support, the second stud being integral with the rigid support.
  • the stud holder is arranged on the balance bridge around a bearing of the balance shaft.
  • the invention also relates to a clockwork movement comprising such a regulating organ.
  • the invention also relates to a timepiece, for example a watch, comprising such a timepiece movement.
  • THE figures 1 to 5 show a schematic representation of a first embodiment of a regulating organ 1, intended to be arranged in a clockwork movement, not shown in the figures.
  • a clockwork movement comprises for example a plate provided with a housing for receiving the regulating member 1, the regulating member 1 being provided with an inertial mass, and an elastic return element of the inertial mass configured to make it oscillate.
  • the regulating organ 1 further comprises a counter-balance system 20, an annular balance 23 as inertial mass, a balance shaft 24, a balance spring 25 as elastic return element, and a balance bridge 22.
  • the balance shaft 24 is centered and passes through the center of the balance 23, the balance spring 25 and the balance bridge 22.
  • the balance shaft 24 is held by two shock-absorbing bearings 28 arranged at both ends of the balance shaft 24.
  • a first bearing not shown in the figures, is arranged under the balance 23 and the balance bridge 22, and the second bearing 28 is held by the balance bridge 22.
  • the balance bridge 22 is provided with a hole, here through, in which the second bearing 28 is held.
  • the index system 20 is mounted on the balance bridge 22 and is arranged, in this embodiment, on the central axis of the balance shaft 24.
  • an example of a spiral spring 25 preferably extends substantially in one plane.
  • the spiral spring 25 comprises a flexible ribbon 2 wound on itself in several turns, the ribbon 2 having a predefined stiffness.
  • the internal end 9 of the ribbon 2 comes from a single material or is assembled to a support 3, generally called a collet.
  • the support 3 has a substantially triangular shape, and is threaded around the balance shaft 24.
  • the spiral spring 25 further comprises means for adjusting its stiffness.
  • the adjustment means are in particular operable by an operator when the regulating organ is mounted on the plate of the clock movement.
  • the adjustment means comprise a flexible element 5 arranged in series with the ribbon 2, the flexible element 5 connecting one end 4 of said ribbon 2 to a rigid support 17, and secured to one of the ends 4 of the ribbon 2.
  • the flexible element 5 is secured to the external end 4 of the ribbon 2.
  • the elastic element 5 is a different element from the ribbon 2.
  • the flexible element 5 adds additional stiffness to that of the strip 2.
  • the flexible element 5 preferably has a stiffness greater than that of the strip 2.
  • the flexible element 5 is here arranged in the extension of the strip 2.
  • the adjustment means and the strip 2 are in one piece, or even formed from the same material, for example silicon.
  • the flexible element 5 of the spiral spring 25 comprises a pivot with uncrossed flexible blades.
  • the pivot comprises two uncrossed flexible blades 11, 12 and a rigid part 18.
  • the flexible blades 11, 12 are joined, on the one hand laterally to a rigid support 17, and on the other hand to the rigid part 18 by approaching each other. Thus, preferably, the flexible blades 11, 12 move away from the rigid part 18 to the rigid support 17.
  • the external end 4 of the ribbon 2 is joined to the rigid part 18.
  • the rigid support 17 is stationary relative to the plate.
  • the rigid support 17 has an L shape, a first branch 46 of the L serving as a connection with the flexible blades 11, 12, the second branch 47 of the L being oriented on the side opposite the pivot with uncrossed blades so that it can be assembled to the clockwork movement.
  • the spiral spring adjustment means 25 further comprise pre-stressing means 6 for applying a variable force or torque to the flexible element 5.
  • pre-stressing means 6 for applying a variable force or torque to the flexible element 5.
  • the torque or force is continuously adjustable by the pre-stressing means 6.
  • the torque or force is not restricted to point values.
  • the stiffness of the flexible element 5 can be adjusted with great precision.
  • the prestressing means 6 comprise a secondary flexible blade 19, arranged on an opposite side of the rigid part 18 in the extension of the pivot with uncrossed blades.
  • the secondary flexible blade 19 is arranged tangentially to the strip 2, at the external end 4.
  • the secondary flexible blade 19 is connected by the other end to a curved lever 14 going around the strip 2.
  • the lever 14 is connected, in addition to the secondary flexible blade 19, to a rigid structure 27 linked to the rigid support 17.
  • the rigid structure 27 deforms partly when the lever 14 is actuated by force or torque.
  • the force or torque is exerted on the free end 15 of the lever 14.
  • the lever 14 of the prestressing means 6 transmits the force or torque to the flexible element 5 via the secondary flexible blade 19 and the rigid structure 27, so as to modify the stiffness of the spiral spring 25.
  • the spiral spring 25 has another configuration.
  • the uncrossed blades 11, 12, the rigid part 18 and the secondary flexible blade 19 are replaced by a single blade, the external end 4 of the lever 14 being attached to the single blade.
  • the regulating organ comprises a counter-rotation system 20.
  • the racket system 20 is provided with a piton holder 31 provided with a first piton 34.
  • the balance bridge 22 is provided with a second stud 35.
  • the stud holder 31 is mechanically linked to the lever 14 of the prestressing means 6, but it does not block the ribbon 2.
  • the stud holder 31 is in contact with the balance bridge 22, and is held and positioned by the shock absorber 28.
  • the stud holder 31 is rotatable around the balance shaft relative to the balance bridge 22, in order to be able to move the first stud 34 and act on the lever 14.
  • the piton holder 31 comprises a central ring 38 arranged around the second bearing 28.
  • the stud holder 31 comprises two protrusions 41, 42, extending radially from the central ring 38, a first protrusion 41 holding the first stud 34 downwards using a first screw 74.
  • the second protrusion 42 holding the second stud 35 downwards using a second screw.
  • first stud 34 and the second stud 35 are for example arranged in a substantially symmetrical manner relative to the balance shaft 24.
  • the first stud 34 cooperates with the free end 15 of the lever 14, and the second stud 35 cooperates with the second branch 47 of the rigid support 17.
  • the prestressing means 6 are supported by the racket system 20, and the elastic element 5 by the balance bridge 22 from which they are suspended.
  • the two studs 34, 35 are arranged on either side of the prestressing means 6 and the elastic element 5. Furthermore, the two studs 34, 35 are rigidly connected to the lever 14 and to the rigid support 17. In other words, the first 34 and the second stud 35 are respectively secured to the lever 14 by the free end 15 and to the rigid support 17 by the second branch 47.
  • the assembly of the studs and the spiral spring 25 is for example carried out by gluing, brazing, welding, by deformation of metallic glass, or by mechanical fixing.
  • the first stud 34 is movable relative to the second stud 35.
  • the stud holder 31 is movable relative to the balance bridge 22.
  • the stud holder 31 is movable in rotation around the second bearing 28.
  • the first stud 34 moves with the stud holder 31, the first stud 34 being movable in rotation around the second bearing 28.
  • the first stud 34 can for example be moved over an angular range of 20°, or even 10°.
  • the movement of the first stud 34 relative to the second stud 35 modifies the stiffness of the elastic element 5, because the movement exerts a more or less significant force or torque on the lever 14 of the prestressing means 6, so that the stiffness of the elastic element 5 varies, and thus the stiffness of the entire spiral spring 25.
  • the index system 20 thus makes it possible to adjust the rate of the regulating member 1.
  • the index system 20 makes it possible to modify the position of the first stud 34 relative to the second stud 35.
  • the stud holder 31 moves relative to the balance bridge 22, and consequently, the first stud 34 moves relative to the second stud 35 to modify the force or torque applied to the prestressing means 6 of the balance spring 25.
  • the piton holder 31 of the racket system 20 comprises an arm 63 extending radially outwards in the same plane.
  • the index system 20 comprises a rotating cam 55 arranged on the balance bridge 22.
  • the cam 55 cooperates with the arm 63 of the stud holder 31 to rotate it around the second bearing 28.
  • the end 56 of the arm 63 is preferably constantly in contact with the cam 55, so that the rotation of the cam 55 exerts a movement on the arm 63 according to the angular position of the cam 55.
  • the stud holder 31 of the index system 20 moves in rotation around the second bearing 28.
  • Such an index system 20 provided with a cam 55 makes it possible to vary the stiffness of the balance spring 25 with linearity.
  • the racket system 20 comprises a spring 57 exerting a return force on the stud holder 31.
  • the spring 57 has a substantially horseshoe shape, a first end 58 of the spring being assembled to the balance bridge 22, and a second end 59 of the spring 57 surrounding a retaining stud 60 extending from the stud holder 31.
  • the spring 57 is arranged in a recess 61 hollowed out in the balance bridge 22 below, on the side of the balance 23 and the balance spring 25.
  • the balance bridge 22 comprises a through hole 62 opening into the recess 61, the stud 60 extending into the recess 61 through the through hole 62.
  • the through hole 62 is sized to allow the stud 60 to move when the stud holder 31 rotates relative to the balance bridge 22.
  • the spring 57 exerts a return force on the stud holder 31 of the indexing system 20, the return force having the function of constantly maintaining the arm 63 of the stud holder in contact with the cam 55.
  • the stud holder 31 rotates to move the first stud 34 relative to the second stud 35, while undergoing a return force exerted by the spring 57, to allow the contact of the arm 63 of the stud holder 31 against the cam 55, in particular when the peripheral wall 64 of the cam 55 moves away from the arm 63.
  • the clockwork system 20 is configured to adjust the rate of the regulating organ 1 with a resolution less than or equal to 1 second per day, preferably less than or equal to 0.5 seconds per day, or even less than or equal to 0.1 seconds per day.
  • the configuration of the regulating organ 1 makes it possible to achieve such precision.
  • Adjustment marks 49 are further arranged on the cam 55.
  • the cam 55 is moved, for example by means of an adjustment knob (not shown in the figures), arranged on the cam 55, and which can be rotated.
  • the cam 55 is oriented according to a preferred mark.
  • the spring 72 is more or less constrained, and exerts a return force on the stud holder 71 to hold the arm 63 against the cam 55, whatever its position.
  • Such a stud holder 71 facilitates its assembly in the regulating organ, since there is only one component to be arranged on the balance bridge. In addition, storage is also simplified, since a single component replaces two components.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Springs (AREA)
  • Electromechanical Clocks (AREA)
  • Micromachines (AREA)
  • Transmission Devices (AREA)
EP23199680.2A 2023-09-26 2023-09-26 Uhreinstellorgan mit verbessertem rückersystem Pending EP4530756A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP23199680.2A EP4530756A1 (de) 2023-09-26 2023-09-26 Uhreinstellorgan mit verbessertem rückersystem
US18/819,297 US20250103006A1 (en) 2023-09-26 2024-08-29 Timepiece regulating member comprising an improved index system
KR1020240119149A KR20250046177A (ko) 2023-09-26 2024-09-03 개선된 인덱스 시스템을 포함하는 타임피스 조절 부재
JP2024151930A JP2025056727A (ja) 2023-09-26 2024-09-04 改善されたインデックスシステムを含む時計調節部材、時計ムーブメント及び時計
CN202411314135.5A CN119717469A (zh) 2023-09-26 2024-09-20 包括改进的快慢针系统的钟表调速机构
CN202422296919.1U CN223180573U (zh) 2023-09-26 2024-09-20 用于钟表机芯的调速机构、钟表机芯和钟表

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23199680.2A EP4530756A1 (de) 2023-09-26 2023-09-26 Uhreinstellorgan mit verbessertem rückersystem

Publications (1)

Publication Number Publication Date
EP4530756A1 true EP4530756A1 (de) 2025-04-02

Family

ID=88204226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23199680.2A Pending EP4530756A1 (de) 2023-09-26 2023-09-26 Uhreinstellorgan mit verbessertem rückersystem

Country Status (5)

Country Link
US (1) US20250103006A1 (de)
EP (1) EP4530756A1 (de)
JP (1) JP2025056727A (de)
KR (1) KR20250046177A (de)
CN (2) CN223180573U (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR488878A (fr) * 1917-02-17 1918-11-21 Fabriques Des Montres Zenith Successeur De Fabriqu Dispositif pour la fixation du piton fixe-spiral au pont de balancier d'une montre
CH305770A (de) * 1952-08-07 1955-03-15 Ag Felsa Reguliervorrichtung für Uhrwerke.
CH345852A (fr) * 1959-03-10 1960-04-15 Surdez Arthur Dispositif amortisseur de chocs pour l'axe du balancier d'un mouvement d'horlogerie
CH447042A (fr) * 1965-09-24 1968-03-15 Tissot Horlogerie Dispositif de fixation de l'extrémité extérieure d'un spiral réglant de pièce d'horlogerie
EP1798609A2 (de) * 2005-12-14 2007-06-20 Patek Philippe Sa Mechanische Vorrichtung zur Einstellung der Hemmung eines Regulierorgans
EP2876504A1 (de) 2013-11-20 2015-05-27 ETA SA Manufacture Horlogère Suisse Schraubenloser Spiralklötzchen-Träger für Uhr
EP3304215A1 (de) 2015-06-03 2018-04-11 ETA SA Manufacture Horlogère Suisse Resonator mit feineinstellung durch indexanordnung
EP4009115A1 (de) 2020-12-02 2022-06-08 Omega SA Spiralfeder für resonatormechanismus eines uhrwerks, der mit mitteln zum ausgleichen der starrheit ausgestattet ist

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH320004A (fr) * 1954-11-11 1957-03-15 Morf Ernest Dispositif de réglage de la longueur active d'un ressort-spiral
CH704687B1 (fr) * 2011-03-23 2015-11-30 Lvmh Swiss Mft Sa Organe réglant pour pièce d'horlogerie.
CH714480A2 (fr) * 2017-12-20 2019-06-28 Swatch Group Res & Dev Ltd Dispositif de réglage autonome de la longueur active d'un spiral.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR488878A (fr) * 1917-02-17 1918-11-21 Fabriques Des Montres Zenith Successeur De Fabriqu Dispositif pour la fixation du piton fixe-spiral au pont de balancier d'une montre
CH305770A (de) * 1952-08-07 1955-03-15 Ag Felsa Reguliervorrichtung für Uhrwerke.
CH345852A (fr) * 1959-03-10 1960-04-15 Surdez Arthur Dispositif amortisseur de chocs pour l'axe du balancier d'un mouvement d'horlogerie
CH447042A (fr) * 1965-09-24 1968-03-15 Tissot Horlogerie Dispositif de fixation de l'extrémité extérieure d'un spiral réglant de pièce d'horlogerie
EP1798609A2 (de) * 2005-12-14 2007-06-20 Patek Philippe Sa Mechanische Vorrichtung zur Einstellung der Hemmung eines Regulierorgans
EP2876504A1 (de) 2013-11-20 2015-05-27 ETA SA Manufacture Horlogère Suisse Schraubenloser Spiralklötzchen-Träger für Uhr
EP3304215A1 (de) 2015-06-03 2018-04-11 ETA SA Manufacture Horlogère Suisse Resonator mit feineinstellung durch indexanordnung
EP4009115A1 (de) 2020-12-02 2022-06-08 Omega SA Spiralfeder für resonatormechanismus eines uhrwerks, der mit mitteln zum ausgleichen der starrheit ausgestattet ist

Also Published As

Publication number Publication date
CN119717469A (zh) 2025-03-28
JP2025056727A (ja) 2025-04-08
KR20250046177A (ko) 2025-04-02
CN223180573U (zh) 2025-08-01
US20250103006A1 (en) 2025-03-27

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