EP4357857A1 - Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der steifigkeit - Google Patents

Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der steifigkeit Download PDF

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Publication number
EP4357857A1
EP4357857A1 EP22202267.5A EP22202267A EP4357857A1 EP 4357857 A1 EP4357857 A1 EP 4357857A1 EP 22202267 A EP22202267 A EP 22202267A EP 4357857 A1 EP4357857 A1 EP 4357857A1
Authority
EP
European Patent Office
Prior art keywords
force
spiral spring
flexible element
ribbon
elongated flexible
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
EP22202267.5A
Other languages
English (en)
French (fr)
Inventor
Ivan Hernandez
Romain Le Moal
Roberto Frosio
Pierre Cusin
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.)
Omega SA
Original Assignee
Omega 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 Omega SA filed Critical Omega SA
Priority to EP22202267.5A priority Critical patent/EP4357857A1/de
Priority to US18/474,448 priority patent/US20240126209A1/en
Priority to JP2023172639A priority patent/JP2024059581A/ja
Priority to CN202311358329.0A priority patent/CN117908351A/zh
Publication of EP4357857A1 publication Critical patent/EP4357857A1/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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • G04B17/345—Details of the spiral roll
    • 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
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • G04B17/34—Component parts or constructional details, e.g. collet, stud, virole or piton for fastening the hairspring onto the balance
    • 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
    • G04B18/023—Regulator or adjustment devices; Indexing devices, e.g. raquettes with means for fine adjustment of the indexing device
    • 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 a spiral spring for a watch resonator mechanism, the spiral spring being provided with means for adjusting the stiffness of said spiral spring.
  • the invention also relates to a watch resonator mechanism provided with such a spiral spring.
  • the sprung balance constitutes the time base of the watch. It is also called a resonator.
  • the balance spring must generally be adjustable to improve the accuracy of a watch.
  • means are used for adjusting the stiffness of the spiral spring, such as a racket to modify the effective length of the spring.
  • the effectiveness of a traditional snowshoe for adjusting gait remains limited, and it is not always effective in making the adjustment sufficiently precise, of the order of a few seconds or a few tens of seconds per day.
  • adjustment means comprising one or more screws arranged in the rim of the balance wheel.
  • screws By acting on the screws, we modify the inertia of the balance, which has the effect of modifying its course.
  • this adjustment mode is not easy to carry out, because it disrupts the balancing of the balance, and still does not make it possible to obtain sufficient fineness of adjustment of the operation of the oscillator.
  • the aim of the present invention is to overcome all or part of the drawbacks mentioned above, by proposing a spiral spring provided with effective and precise adjustment means, configured in particular to adjust the rate of a timepiece by modifying the stiffness effective of said hairspring.
  • the invention relates to a spiral spring, in particular for a watch resonator mechanism, the spiral spring comprising a flexible ribbon wound on itself in several turns, the ribbon having a predefined stiffness, the spring -spiral comprising means for adjusting its stiffness, the adjustment means comprising a single elongated flexible element arranged in series with the ribbon, the elongated flexible element connecting one end of said ribbon to a fixed support, so as to add stiffness additional to the ribbon, the adjustment means comprising prestressing means to apply at least two different forces on the elongated flexible element.
  • the invention is remarkable in that the prestressing means comprise a first lever attached to the end of the ribbon to be able to adjust a first force, the prestressing means comprising a second lever also attached to the end of the ribbon to be able to adjust a second effort independently of the first effort.
  • the invention it is possible to modify the stiffness of the elongated flexible element, such as a flexible blade.
  • the stiffness of the elongated flexible element With a single effort applied, whether force or torque, the stiffness of the elongated flexible member remains the same. With two perpendicular forces on the blade, longitudinally and orthogonally, we obtain an overall force, which varies the stiffness of the elongated flexible element. With a force and a torque, we also modify the stiffness. The combination of two efforts is essential to succeed in modifying the stiffness.
  • the intensity level of the stress is modulated, which results in a modification of the stiffness of the assembly comprising the flexible element and the ribbon.
  • the flexible element placed in series with the ribbon provides additional stiffness, which combines with that of the ribbon.
  • a flexible element in series of the ribbon is placed between one end of the ribbon and the fixed support.
  • This flexible element provides additional adjustable stiffness between the ribbon and the ribbon attachment point, and thus provides additional flexibility to the resonator.
  • the effective stiffness of the resonator includes the stiffness of the ribbon and the stiffness of the flexible element.
  • Variable forces are then applied to pre-stress the flexible element, preferably without pre-stressing the ribbon.
  • pre-stressing the flexible element By pre-stressing the flexible element, its stiffness changes, while the stiffness of the ribbon remains substantially unchanged.
  • the stiffness of the resonator changes, which consequently modifies the operation of the resonator.
  • the two levers each allow preload adjustment to be made independently of each other, so that a more precise adjustment is obtained.
  • the levers are different from each other, we obtain two settings of different intensities.
  • the first force is provided either by a first traction/compression force directed substantially in the longitudinal direction of the elongated flexible element, or by a first force directed substantially in a direction substantially orthogonal to the longitudinal direction of the elongated flexible element, or by a first torque, preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.
  • the second force is provided either by a second traction/compression force directed substantially in the longitudinal direction of the elongated flexible element, or by a second force directed substantially in a substantially orthogonal direction to the longitudinal direction of the elongated flexible element, or by a second torque, preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.
  • the prestressing means are configured to exert a third force on the elongated flexible element, the third force being provided, respectively to the first force, either by a force directed substantially in a direction substantially orthogonal to the longitudinal direction of the elongated flexible element, or by a torque, preferably a bending moment .
  • the prestressing means are configured to exert a third force on the elongated flexible element, the third force being provided, respectively to the first force, either by the first traction/compression force, either by the first substantially orthogonal force, or by the first couple.
  • the third effort is adjustable by the first lever.
  • the third effort is adjustable by the first lever.
  • the prestressing means are configured to exert a fourth force on the elongated flexible element, the fourth force being supplied, respectively to the second force, either by the second traction/compression force, either by the second substantially orthogonal force, or by the second couple.
  • the fourth effort is adjustable by the second lever.
  • the prestressing means are configured to exert a fifth force on the elongated flexible element, the fifth force being supplied, respectively to the first force and to the third force, or by the first force of traction/compression, either by the first substantially orthogonal force, or by the first couple.
  • the fifth effort is adjustable by the first lever.
  • the prestressing means are configured to exert a sixth force on the elongated flexible element, the sixth force being provided, respectively to the second and to the fourth force, or by the second traction force /compression, either by the second substantially orthogonal force, or by the second couple.
  • the sixth effort is adjustable by the second lever.
  • the longitudinal flexible element is a single flexible blade.
  • the flexible element is arranged in a radial direction of the spiral spring.
  • the first and the second lever are flexible.
  • the first and the second are curved and surround at least partly the wound ribbon.
  • the first and the second lever comprise a first free end actuable by a movement of said first free end in order to apply said forces on the elongated flexible element.
  • the second lever comprises a second free end actuable by a movement of said second free end in order to apply said forces on the elongated flexible element.
  • the end of the ribbon comprises an appendage, the prestressing means and the elongated flexible element being joined to the appendage.
  • the longitudinal force(s), and possibly the torque are continuously adjustable by the prestressing means.
  • the flexible element is arranged at an external end of the ribbon.
  • the end of the ribbon is more rigid than the elongated flexible element and the ribbon.
  • the elongated flexible element and the levers are arranged at an external end of the ribbon.
  • the elongated flexible element comprises a flexible neck.
  • the first and the second lever are configured to allow adjustment of the effort(s) to different intensities.
  • the first and the second lever have a stiffness or a section different from one another.
  • the invention also relates to a rotary resonator mechanism, in particular for a watch movement, comprising an oscillating mass and such a spiral spring.
  • FIG. 1 shows a schematic representation of an embodiment of a spiral spring 1, in particular for a watch resonator mechanism.
  • the spiral spring 1 extends substantially in the same plane.
  • the spiral spring 1 comprises a flexible ribbon 2 wound on itself in several turns, the ribbon 2 having a predefined stiffness.
  • the spiral spring 1 includes means for adjusting its stiffness.
  • the adjustment means are particularly operable when the spiral spring 1 is mounted on a plate of a clock movement, not shown in the figures.
  • the adjustment means comprise an elongated flexible element 5 extending longitudinally, which is arranged in series with the ribbon 2, the flexible element 5 connecting one end 4 of said ribbon 2 to a fixed support 11.
  • the ribbon 2 is connected to the fixed support 11 only by this flexible element 5.
  • the flexible element 5 is secured to one of the ends 4 of the ribbon 2.
  • the embodiments described below include a flexible element 5 secured to the external end 4 of the ribbon 2.
  • the internal end 19 of the ribbon 2 is intended to be assembled to a support 3 of an oscillating mass of the resonator 1.
  • the flexible element 5 adds additional stiffness to that of the ribbon 2.
  • the flexible element 5 preferably has a stiffness greater than that of the ribbon 2.
  • the flexible element 5 is here arranged in the extension of the ribbon 2.
  • the adjustment means 5 and the ribbon 2 are in one piece, or even made of the same material.
  • the end of the ribbon 2 is here curved perpendicularly to form an appendix 9.
  • the appendix 9 serves as an attachment point, and allows forces to be received. It is preferably substantially rigid, that is to say at least more rigid than the ribbon 2 and/or the elongated flexible element 5, to minimize its influence on the stiffness of the ribbon 2.
  • the longitudinal flexible element 5 is a single flexible blade 13, 15 connecting the appendix 9 to the fixed support 11, 14.
  • the single flexible blade 13 is arranged in the extension of the appendage 9.
  • the single flexible blade 13 is arranged in a direction perpendicular to the end of the ribbon 2.
  • the single flexible blade 13 is arranged in a radial direction, preferably passing through the center of the spiral spring 1, in the rest position of the spiral spring 1.
  • the spiral spring 1 further comprises prestressing means 6 for applying to the flexible element 5 at least two different forces, a first force and a second force.
  • the first force is provided either by a first traction/compression force directed substantially in the longitudinal direction F L 1 of the elongated flexible element, or by a first force directed substantially in a direction substantially orthogonal F T 1 to the longitudinal direction of the elongated flexible element, or by a first couple M 1 , preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.
  • the second force is provided either by a second traction/compression force directed substantially in the longitudinal direction F L 2 of the elongated flexible element, or by a second force directed substantially in a direction substantially orthogonal F T 2 to the longitudinal direction of the elongated flexible element 5, or by a second couple M 2 , preferably a bending moment, so as to vary the stiffness of the elongated flexible element as a function of the prestress level.
  • the first force is the first longitudinal traction-compression force F L 1
  • the second force is the second orthogonal force F T 2 , which are variable.
  • the two forces preferably belong to the plane of the spiral spring 1.
  • the stiffness of the spiral spring 1 can be finely adjusted, in particular to improve the precision of the movement.
  • the prestressing means 6 allow the flexible element 5 to undergo a compressive or tensile force depending on the value of the forces. Thus, the stiffness of the flexible element 5 is varied.
  • the forces such as the longitudinal forces F L 1 , F L 2 and orthogonal forces F T 1 , F T 2 , are continuously adjustable by the prestressing means 6.
  • the forces are not restricted to discrete values.
  • the stiffness of the flexible element 5 can be adjusted with great precision.
  • the prestressing means 6 comprise a first lever 8 joined to the external end 4 of the ribbon 2.
  • the first lever 8 is curved and surrounds a part of the rolled up ribbon 2.
  • the first lever 8 has the shape of a semi-circle, or arc of a circle with an angle at the center close to 180°, attached to the appendix 9 of the end 4 of the ribbon 2.
  • the first lever 8 further comprises a first free end 12 actuable by a movement of said first free end 12, in order to apply said forces.
  • the first lever 8 is preferably flexible.
  • the first free end 12 is arranged opposite the appendix 9.
  • the first lever 8 is preferably arranged in the plane of the spiral spring 1. The first lever 8 thus makes it possible to adjust the first force.
  • the prestressing means 6 comprise a second lever 15 joined to the outer end 4 of the ribbon 2.
  • the second lever 15 is curved and surrounds a part of the rolled up ribbon 2, preferably on the other side of the ribbon 2 relative to the first lever 8.
  • the second lever 15 has the shape of a semi-circle, or an arc of a circle with a central angle close to 90°, attached to the appendix 9 of the end 4 of the ribbon 2.
  • the second lever 15 further comprises a second free end 16 actuable by a movement of said first free end 16, in order to apply said forces.
  • the second free end 16 is arranged opposite the appendix 9.
  • the second lever 16 is preferably flexible.
  • the second lever 15 is preferably arranged in the plane of the spiral spring 1. The second lever 15 thus makes it possible to adjust the second force.
  • the first 8 and the second lever 15 come together and are joined to the same appendix 9 of the curved part of the end 4 of the ribbon 2.
  • the first lever 8 allows the first force to be adjusted, while the second lever 15 allows the second force to be adjusted.
  • the two forces are adjustable independently of each other.
  • the prestressing means 6 are preferably configured to exert other forces on the elongated flexible element 5 by means of the first 8 and the second lever 15.
  • Each lever 8, 15 preferably exerts several forces, independently of one of the 'other, here three efforts simultaneously.
  • the prestressing means 6 are configured to exert a third force on the elongated flexible element.
  • the third force being provided, respectively to the first force, either by the first traction/compression force F L 1 , or by the first substantially orthogonal force F T 1 , or by the first couple M 1 .
  • the third force is the first substantially orthogonal force F T 1 .
  • the third effort is adjustable using the first lever 8.
  • the first lever 8 makes it possible to simultaneously adjust the first and third forces.
  • the prestressing means 6 are further configured to exert a fourth force on the elongated flexible element 5, the fourth force being supplied, respectively to the second force, either by the second traction/compression force F L 1 , or by the second substantially orthogonal force F T 2 , or by the second couple M 2 .
  • the fourth force is the second substantially longitudinal force F L 2 .
  • the fourth effort is adjustable using the second lever 15.
  • the prestressing means 6 are further configured to exert a fifth force on the elongated flexible element 5, the fifth force being provided, respectively at the first force and at the third force, either by the first traction/compression force F L 1 , or by the first substantially orthogonal force F T 1 , or by the first couple M 1 .
  • the fifth effort is the first couple M 1 .
  • the fifth effort is adjustable using the first lever 8.
  • the fifth effort is adjustable using the first lever 8.
  • the prestressing means 6 are also configured to exert a sixth force on the elongated flexible element 5, the sixth force being supplied, respectively to the second and to the fourth force, either by the second traction/compression force F L 2 , or by the second substantially orthogonal force F T 2 , or by the second couple M 2 .
  • the sixth effort is the second couple M 2 .
  • the sixth effort is adjustable by the second lever 15.
  • each lever 8, 15 is opposite, except for the longitudinal forces F L 1 , F L 2 which have a identical meaning.
  • the first 8 and the second lever 15 have a similar effect on the stiffness of the elongated flexible element 5. The more one raises a lever 8, 15, the more the stiffness of the elongated flexible element 5 increases.
  • Each lever makes it possible to individually modify the stiffness of the elongated flexible element 5, because it provides at least two forces.
  • the first 8 and the second lever 18 are configured to allow adjustment of the forces it applies to different intensities.
  • one lever allows adjustment within a wider adjustment range, and the other lever allows adjustment within a finer adjustment range.
  • the section of the two levers 8, 15 is for example chosen different, or else the stiffness of each lever 8, 15 is chosen different.
  • the forces or torques applied are less with a smaller section or stiffness than with a larger section or stiffness, so that the two levers 8, 15 make it possible to modify the stiffness of the elongated flexible element 5 on two different scales.
  • Such levers 8, 15 make it possible to keep a spiral spring 1 with a reduced bulk, the dimensions being restricted to be able to be inserted in a watch movement.
  • the prestressing means 6 have a shape which matches the ribbon 2, so as to keep the dimensions sufficiently small, because each part of the prestressing means 6 is close to the ribbon 2.
  • the width of the spiral spring 1 is therefore little modified by the prestressing means.
  • the spiral spring 1 is sufficiently compact to be able to be easily inserted into a movement.
  • the actuation of the first lever 8 produces on the end 4 of the ribbon 2 the longitudinal force F L 1 directed according to the longitudinal axis of the longitudinal flexible element 5, as well as an orthogonal force F T 1 directed in an orthogonal direction.
  • the actuation of the first lever 8 also produces a torque or a bending moment M 1 on the single blade 5, represented by a curved arrow.
  • Actuation of the second lever 15 produces the longitudinal force F L 2 directed in the same direction as the longitudinal force F L 1 , the orthogonal force F T 2 directed in the opposite direction of the orthogonal force F T 1 , and a torque M 2 in the opposite direction of the couple M 1 .
  • the stiffness of the single blade 13 is modified, and therefore of the assembly comprising the ribbon 2 and the single flexible blade 13.
  • the longitudinal forces F L 1 , F L 2 and orthogonal forces F T 1 , F T 2 are varied as well as the torques M 1 , M 2 by the movement of the first free end 12 of the first lever 8 and by the movement of the second free end 16 of the second lever 15.
  • the first 12 and the second free end 16 are preferably rigid to facilitate their actuation.
  • the stiffness of the flexible element 5 and therefore of the assembly comprising the flexible element 5 and the ribbon 2 is varied.
  • the invention also relates to a watch movement comprising such a spiral spring 1.
  • the spiral spring is in particular used to actuate the movement of a balance wheel.
  • the flexible blades described in the different embodiments of the spiral spring can be continuous flexible blades, as is generally the case in the figures, or else blades with rigid sections and flexible necks. connecting the sections.
  • the single flexible blade can take orientations other than radial and orthogonal to the spiral spring. Thus, it can be oriented in any direction between the radial and orthogonal directions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Springs (AREA)
EP22202267.5A 2022-10-18 2022-10-18 Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der steifigkeit Pending EP4357857A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22202267.5A EP4357857A1 (de) 2022-10-18 2022-10-18 Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der steifigkeit
US18/474,448 US20240126209A1 (en) 2022-10-18 2023-09-26 Spiral spring for a horological resonator mechanism provided with means for adjusting the stiffness
JP2023172639A JP2024059581A (ja) 2022-10-18 2023-10-04 剛性を調整する手段を備える計時器用共振器機構のための渦巻きばね
CN202311358329.0A CN117908351A (zh) 2022-10-18 2023-10-18 用于钟表谐振器机构的设有用于调节刚度的装置的螺旋游丝

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22202267.5A EP4357857A1 (de) 2022-10-18 2022-10-18 Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der steifigkeit

Publications (1)

Publication Number Publication Date
EP4357857A1 true EP4357857A1 (de) 2024-04-24

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Application Number Title Priority Date Filing Date
EP22202267.5A Pending EP4357857A1 (de) 2022-10-18 2022-10-18 Spiralfeder für resonatormechanismus einer uhr mit mitteln zur einstellung der steifigkeit

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US (1) US20240126209A1 (de)
EP (1) EP4357857A1 (de)
JP (1) JP2024059581A (de)
CN (1) CN117908351A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2138912B1 (de) * 2008-06-24 2012-07-04 Michel Belot Spiralfeder für Uhrwerk mit konzentrischer Entwicklung
CH703273B1 (fr) * 2010-06-10 2015-02-27 Montres Breguet Sa Spiral Breguet à double courbe terminale.
EP4009115A1 (de) * 2020-12-02 2022-06-08 Omega SA Spiralfeder für resonatormechanismus eines uhrwerks, der mit mitteln zum ausgleichen der starrheit ausgestattet ist

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2138912B1 (de) * 2008-06-24 2012-07-04 Michel Belot Spiralfeder für Uhrwerk mit konzentrischer Entwicklung
CH703273B1 (fr) * 2010-06-10 2015-02-27 Montres Breguet Sa Spiral Breguet à double courbe terminale.
EP4009115A1 (de) * 2020-12-02 2022-06-08 Omega SA Spiralfeder für resonatormechanismus eines uhrwerks, der mit mitteln zum ausgleichen der starrheit ausgestattet ist

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JP2024059581A (ja) 2024-05-01
CN117908351A (zh) 2024-04-19
US20240126209A1 (en) 2024-04-18

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