EP1973013A1 - Unruh für Uhrwerk - Google Patents

Unruh für Uhrwerk Download PDF

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Publication number
EP1973013A1
EP1973013A1 EP07005731A EP07005731A EP1973013A1 EP 1973013 A1 EP1973013 A1 EP 1973013A1 EP 07005731 A EP07005731 A EP 07005731A EP 07005731 A EP07005731 A EP 07005731A EP 1973013 A1 EP1973013 A1 EP 1973013A1
Authority
EP
European Patent Office
Prior art keywords
balance
arms
weights
hub
balance according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07005731A
Other languages
English (en)
French (fr)
Other versions
EP1973013B1 (de
Inventor
Laurent Rougny
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.)
Richemont International SA
Original Assignee
Richemont International 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 Richemont International SA filed Critical Richemont International SA
Priority to DE200760011393 priority Critical patent/DE602007011393D1/de
Priority to EP20070005731 priority patent/EP1973013B1/de
Priority to CNA200810086895XA priority patent/CN101271315A/zh
Publication of EP1973013A1 publication Critical patent/EP1973013A1/de
Priority to HK08112497.5A priority patent/HK1118617A1/xx
Application granted granted Critical
Publication of EP1973013B1 publication Critical patent/EP1973013B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/08—Oscillators with coil springs stretched and unstretched axially

Definitions

  • the subject of the present invention is a pendulum for a clockwork movement that makes it possible to achieve high performances, that is to say to present higher quality factors than current balances both in horizontal position (Qh) and in position. vertical (Qv).
  • a first object of the present invention is to provide a balance whose quality factors Qh and Qv are the highest possible.
  • a second object of the invention is to provide a balance having good Qh and Qv intrinsic quality factors but which is optimized in the sense that the difference between quality factors Qh and Qv is reduced in order to reduce the differences in amplitudes. in flat-hung and thus ensure that the energy losses for the operation of an exhaust regulator provided with such a pendulum undergo variations as low as possible depending on the position of the balance in space.
  • the pendulum for a watch movement according to the present invention is distinguished by the features set forth in claim 1.
  • the performance of a pendulum for a watch movement is characterized by its ability to oscillate in various positions.
  • the oscillation capacity of a balance spring system is measured by quality factors Qv in vertical position and Qh in horizontal position.
  • Q ⁇ ⁇ tps . freq ln ( 300 ) - ln 200
  • ⁇ is the constant pi freq is the oscillation frequency of the pendulum tps is the time elapsed to go from 300 degrees to 200 degrees.
  • the factor Qv is naturally worse than the factor Qh because the friction in the bearings of the balance shaft are greater in the vertical position thereof than in horizontal position.
  • the objective of the present invention is to provide a better performing balance therefore can lead to quality factors Qv and Qh improved significantly.
  • the balance according to the present invention comprises a hub 1 intended to be fixed on a balance shaft connected to at least two weights 3 by arms 2.
  • the weights 3 are independent, that is to say they are not in contact with each other, but preferably they all have the same size and the same shape and they are evenly distributed around the hub 1.
  • the balance illustrated at Figures 1 and 2 comprises two flyweights 3, but in variants the balance could comprise three, four, or even more flyweights 3.
  • the cumulative angle of the arcs formed by all the flyweights is an angle which is considerably lower than 360 ° so that, compared to conventional balances, the beam of the rod according to the invention is effectively partially reduced or eliminated reducing accordingly the surfaces in contact with the air and thus the friction forces that derive therefrom.
  • this cumulative angle is less than or equal to 225 °, but in certain preferred embodiments (such as those of Figures 1 and 2 ), this cumulative angle is equal to or less than 90 °.
  • the balance is made of a single high density material, such as platinum, gold or their alloys.
  • the two arms 2 are perforated and thin to reduce the weight in order to concentrate the weight of the balance as far as possible from the axis.
  • the arms are profiled so as to oppose less resistance to air during pendulum oscillations.
  • the frontal slices 2a, 2b of the arms are not perpendicular to the plane of the balance but inclined V-shaped or C to allow better penetration into the air during their oscillations.
  • each weight 3 is connected to the hub 1 by a single arm 2, so that each arm 2 carries its own weight 3 at its end.
  • a flyweight can be connected to the hub 1 by several arms, the arms being preferably thinner and / or more perforated in this case.
  • the arms 2 may have a variable geometric section so that they are wider near the hub 1 and thinner near the weights 3.
  • the geometry of the arms is optimized to tend to a beam of equal strength which reduces the thickness or width of the arms towards their ends.
  • the arms are therefore thinner from the center to the outside which allows to obtain a minimum weight and stresses tending to be substantially constant along the arms. These arms are therefore more variable section to the center than to the end thus allowing to lighten the arms.
  • weights 3 Most of the weight of the balance is concentrated in the weights 3 fixed on or come from a workpiece with the ends of the arms, These weights 3 comprise front portions 3a, 3b contoured to optimize their penetration into the air.
  • Each weight 3 comprises peripheral housing 4 in which are arranged the heads of the adjusting screws 5 screwed into the counterweight and allowing balancing and perfect adjustment of the balance.
  • Compared to a traditional balance wheel balance according to the invention allows to reduce the weight for a given size by the removal of the continuous serge which is replaced by individual weights and the openwork of the arms.
  • the rocker according to the invention can significantly reduce the friction with air moving parts, the surfaces in contact being reduced and the arms and the weights being aerodynamically profiled.
  • the second embodiment of the pendulum according to the invention illustrated in FIG. figure 2 is a bi-material balance.
  • the arms 2 are made of a light material such as titanium, aluminum, magnesium or their alloys or even a lightweight composite material and are also openwork.
  • the weights 3 are similar to those described with reference to the first embodiment and are fixed by screws, rivets or overmoulding, gluing or any other way on the end of the arms 2. As in the first form of The execution of the arms 2 and the weights 3 are aerodynamically profiled to reduce friction in the air.
  • This improvement in efficiency (loss of energy dissipated) of the balance according to the invention makes it possible to substantially increase the choice or combination of either the power reserve or the operating amplitude.
  • the balance is made of one or more materials it always comprises several, at least two, arms distributed uniformly around a hub 1, each of these arms 2 carrying a weight 3 independent.
  • all the weights have the same size and the same shape,
  • each weight 3 is preferably connected by a single arm to said hub.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Gyroscopes (AREA)
EP20070005731 2007-03-21 2007-03-21 Unruh für Uhrwerk Active EP1973013B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE200760011393 DE602007011393D1 (de) 2007-03-21 2007-03-21 Unruh für Uhrwerk
EP20070005731 EP1973013B1 (de) 2007-03-21 2007-03-21 Unruh für Uhrwerk
CNA200810086895XA CN101271315A (zh) 2007-03-21 2008-03-20 时计运转装置的平衡器
HK08112497.5A HK1118617A1 (en) 2007-03-21 2008-11-14 Balance for a timepiece movement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070005731 EP1973013B1 (de) 2007-03-21 2007-03-21 Unruh für Uhrwerk

Publications (2)

Publication Number Publication Date
EP1973013A1 true EP1973013A1 (de) 2008-09-24
EP1973013B1 EP1973013B1 (de) 2010-12-22

Family

ID=38983366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070005731 Active EP1973013B1 (de) 2007-03-21 2007-03-21 Unruh für Uhrwerk

Country Status (4)

Country Link
EP (1) EP1973013B1 (de)
CN (1) CN101271315A (de)
DE (1) DE602007011393D1 (de)
HK (1) HK1118617A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH700640A1 (fr) * 2009-03-19 2010-09-30 Mhvj Manufacture Horlogere Val Piece d'horlogerie allegee et renforcee.
WO2013084043A1 (fr) * 2011-12-09 2013-06-13 Cartier Creation Studio S.A. Procede d'adaptation d'un mouvement d'horlogerie prevu pour fonctionner a la pression atmospherique ambiante a un fonctionnement dans une atmosphere a basse pression
USD805942S1 (en) * 2016-03-23 2017-12-26 Robert W. Koelewyn Hub and hands of a watch

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2410387B1 (de) * 2010-07-19 2016-07-06 Nivarox-FAR S.A. Unruh mit Trägheitsregulierung ohne Einsatzteil
EP3667432B1 (de) * 2018-12-13 2022-05-11 ETA SA Manufacture Horlogère Suisse Uhrresonator, der mindestens eine flexible führung umfasst
EP3839656B1 (de) * 2019-12-18 2023-12-13 Nivarox-FAR S.A. Unruh für uhrwerk

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1079370A (en) * 1964-11-16 1967-08-16 Hugo Hettich Movement control for a clock
CH551033A (de) * 1971-04-02 1974-06-28
WO2006045824A2 (fr) * 2004-10-26 2006-05-04 Tag Heuer Sa Organe reglant pour montre bracelet, et mouvement mecanique comportant un tel organe reglant

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1079370A (en) * 1964-11-16 1967-08-16 Hugo Hettich Movement control for a clock
CH551033A (de) * 1971-04-02 1974-06-28
WO2006045824A2 (fr) * 2004-10-26 2006-05-04 Tag Heuer Sa Organe reglant pour montre bracelet, et mouvement mecanique comportant un tel organe reglant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH700640A1 (fr) * 2009-03-19 2010-09-30 Mhvj Manufacture Horlogere Val Piece d'horlogerie allegee et renforcee.
WO2013084043A1 (fr) * 2011-12-09 2013-06-13 Cartier Creation Studio S.A. Procede d'adaptation d'un mouvement d'horlogerie prevu pour fonctionner a la pression atmospherique ambiante a un fonctionnement dans une atmosphere a basse pression
US9535404B2 (en) 2011-12-09 2017-01-03 Cartier International Ag Method for adapting a timepiece movement provided to operate in ambient atmospheric pressure so as to operate in a low-pressure atmosphere
USD805942S1 (en) * 2016-03-23 2017-12-26 Robert W. Koelewyn Hub and hands of a watch

Also Published As

Publication number Publication date
CN101271315A (zh) 2008-09-24
HK1118617A1 (en) 2009-02-13
EP1973013B1 (de) 2010-12-22
DE602007011393D1 (de) 2011-02-03

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