EP0029204A1 - Mechanismus zum Einstellen eines Zentrumrades - Google Patents

Mechanismus zum Einstellen eines Zentrumrades Download PDF

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Publication number
EP0029204A1
EP0029204A1 EP80106960A EP80106960A EP0029204A1 EP 0029204 A1 EP0029204 A1 EP 0029204A1 EP 80106960 A EP80106960 A EP 80106960A EP 80106960 A EP80106960 A EP 80106960A EP 0029204 A1 EP0029204 A1 EP 0029204A1
Authority
EP
European Patent Office
Prior art keywords
wheel
pinion
center wheel
positioning
center
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
EP80106960A
Other languages
English (en)
French (fr)
Other versions
EP0029204B1 (de
Inventor
Cyril Vuilleumier
Bruno Erni
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.)
SSIH Management Services SA
Original Assignee
SSIH Management Services SA
Societe Suisse pour lIindustrie Horlogere Management Services 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 SSIH Management Services SA, Societe Suisse pour lIindustrie Horlogere Management Services SA filed Critical SSIH Management Services SA
Publication of EP0029204A1 publication Critical patent/EP0029204A1/de
Application granted granted Critical
Publication of EP0029204B1 publication Critical patent/EP0029204B1/de
Expired 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
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears
    • 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
    • G04B13/00—Gearwork
    • G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands

Definitions

  • the present invention relates to a mechanism for positioning a center wheel in an electronic timepiece with analog display comprising a jumper, the first end set of which ends in two inclined planes cooperating with the toothing of the center wheel and the second of which end is rotatably mounted with greasy friction on the plate.
  • Such a mechanism is known from the prior art and is found to be applied in certain chronographs or in certain electronic watches with analog display with the aim of accurately positioning the seconds treble with respect to the indexes carried on the dial.
  • Precise positioning of the hand in relation to the index finger is even more desirable in electronic watches comprising an hour hand and a minute hand only and where the minute hand, driven by a stepping motor, advances one division per minute. It will be understood that in this case the eye has plenty of time to judge whether the hand is well positioned relative to the index, which can represent a guarantee as to the good quality of the watch.
  • the positioning of the jumping second or minute hands pa relative to the indexes of a dial depends on the play existing in the gear train which is located between the motor axis and the center wheel which carries the needle, the round of the mobiles and the regularity with which the divisions of the dial are marked.
  • a positioning jumper is generally used which acts directly on the teeth of the center wheel which is worn either by the minute hand or the second hand. In this way, the angular pitch of the needle is found to be strictly the same as that of the toothing of the wheel.
  • FIG. 1 shows a mechanism for positioning a center wheel according to the prior art.
  • This mechanism comprises a jumper 1 constituted by an elastic blade, the first end of which carries a ruby polyhedron 2 which cooperates with the toothing 3 of the center wheel 4. It is more simply possible to fold the end, emitted from the blade, to form a triangle whose two inclined planes cooperate with the teeth.
  • the other end of the jumper 1 is fixed on a 5 which can pivot frictionally about an axis 6 itself in solidarity with a stud 7. In this stud feels two oblong holes
  • the hole 8 receives a circular pin 10 fixed to the plate and the hole 9, a screw 11 screwed into the plate.
  • the center wheel is driven by the pinion 12 of an intermediate wheel 13 which meshes with the pinion 14 of a stepping motor.
  • FIG. 2 shows the cog train intended to drive the minute and hour hands of a timepiece.
  • the pinion 14 drives a mobile 29 composed of a wheel 16 and a pinion 17.
  • the central wheel solid with the axis 19 carrying the minute hand meshes on the pinion 17.
  • the axis 20 of the hour hand is rotated by the gear train composed of the pinion 21 secured to the center wheel 4 and the timer formed by the gears 22, 23 and 24.
  • the wheel 24 is formed in one piece with the axis 20 carrying the hour hand.
  • the axes of the various mobiles are rotatably mounted in bearings 25 and 26 driven into the plate 27 and the bridge 28 of the timepiece.
  • Figure 3 is a plan view of the same mechanism along the dotted line AA shown in Figure 2.
  • Figure 3 does does not represent the timer formed by the gears 21, 22, 23 and 24 which is not necessary for understanding the invention.
  • the mobile 29 is composed of a pinion 17 meshing with the center wheel 4 and a wheel 16 mounted with friction with respect to the said pinion 17.
  • FIG. 3 shows how the wheel 16 is made.
  • it is perforated in its center by stamping two circular parts 30 and two rectilinear parts 31 leading to a central circular recess 32.
  • This produces a wheel with four spokes 33 which connect its periphery to its center .
  • the diameter of said recess 32 is chosen slightly smaller than the diameter of the tigeron 18 (FIG. 2) of the mobile 29 so that when the wheel is inserted on the tigeron there is fatty friction on the one hand relative to the other.
  • FIG. 2 also shows that the upper part of the tigeron 18 comprises ur protrusion 34 which prevents the wheel 16 from coming out of its housing.
  • a good seat to the wheel 16 is ensured by practicing in the pinion 17 a circular groove 35.
  • the invention is not limited to the above description which explains a preferred embodiment of the mobile 29.
  • the wheel 16 may for example include six rays 33 distributed over the circumference. It can also be openwork; in this case, an elastic washer is superimposed on it which, retained by the protrusion 34, provides the requested friction.
  • FIGS. 2 and 3 show that the toothing 3 of the center wheel 4 cooperates with a jumper 1, one of the ends of which is terminated by a ruby polyhedron 2.
  • the other end of the jumper is secured to a ferrule 5 which is mounted with fatty friction on an axis 6 fixed to the plate as can be seen in FIG. 3.
  • this construction is notably simplified since it is no longer necessary to provide the stud 7, the pin 10 and the screw 11 shown in FIG. 1.
  • the invention can naturally also be applied to a center wheel which carries the second hand.
  • the invention relates above all to an electronic timepiece comprising a stepping motor, but could be extended to a mechanical chronograph watch to position the second hand.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
EP80106960A 1979-11-16 1980-11-12 Mechanismus zum Einstellen eines Zentrumrades Expired EP0029204B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7928761 1979-11-16
FR7928761A FR2469743A1 (fr) 1979-11-16 1979-11-16 Mecanisme de positionnement d'une roue de centre pour piece d'horlogerie

Publications (2)

Publication Number Publication Date
EP0029204A1 true EP0029204A1 (de) 1981-05-27
EP0029204B1 EP0029204B1 (de) 1983-06-29

Family

ID=9231962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106960A Expired EP0029204B1 (de) 1979-11-16 1980-11-12 Mechanismus zum Einstellen eines Zentrumrades

Country Status (5)

Country Link
US (1) US4408898A (de)
EP (1) EP0029204B1 (de)
JP (1) JPS56124077A (de)
DE (1) DE3063990D1 (de)
FR (1) FR2469743A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2034374A2 (de) 2007-09-07 2009-03-11 Lange Uhren GmbH Uhr
EP2241945A3 (de) * 2009-04-15 2016-12-21 Patek Philippe SA Genève Chronographenmechanismus und mit diesem Mechanismus ausgerüstete Uhr

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974989A (en) * 1983-08-22 1990-12-04 Larry Salter Method for reducing installation forces and costs in a tapered bolt installation
JP2011053019A (ja) * 2009-08-31 2011-03-17 Seiko Instruments Inc スリップ歯車構造体及びこれを備えた時計
EP2560057B1 (de) * 2011-08-17 2014-04-02 ETA SA Manufacture Horlogère Suisse Uhrwerk mit reduzierter Höhe und großer Gangreserve
US9678477B2 (en) * 2014-09-12 2017-06-13 Seiko Instruments Inc. Mechanical component, mechanical component manufacturing method, movement, and timepiece
EP3825779B1 (de) * 2019-11-21 2025-05-14 ETA SA Manufacture Horlogère Suisse Bewegliche uhrwerkskomponente mit einem durch reibung gehaltenen element

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1421043A (fr) * 1964-01-21 1965-12-10 United States Time Corp Train de minuterie pour montre
DE1932285A1 (de) * 1969-06-26 1971-01-07 Kieninger & Obergfell Radialfriktion fuer feinmechanische Getriebeanordnungen,insbesondere Uhrwerke
DE2647634A1 (de) * 1975-11-04 1977-05-05 Seiko Instr & Electronics Sekundenspringer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH184666A (fr) 1935-08-01 1936-06-15 Colomb Henri Dispositif pour assurer que la position relative de deux mobiles reliés par engrenage soit indépendante du sens dans lequel un effort a été appliqué en dernier lieu à l'un de ces deux mobiles.
CH312742A (fr) * 1953-10-08 1956-02-29 Ebauches Sa Pièce d'horlogerie avec mécanisme de seconde instantanée
US3487633A (en) * 1968-01-23 1970-01-06 Us Time Corp The Dial train friction device
JPS4917670Y1 (de) * 1969-09-25 1974-05-08
GB1343223A (en) * 1971-02-17 1974-01-10 Suwa Seikosha Kk Detent apparatus eg for use in an electronic timepiece

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1421043A (fr) * 1964-01-21 1965-12-10 United States Time Corp Train de minuterie pour montre
DE1932285A1 (de) * 1969-06-26 1971-01-07 Kieninger & Obergfell Radialfriktion fuer feinmechanische Getriebeanordnungen,insbesondere Uhrwerke
DE2647634A1 (de) * 1975-11-04 1977-05-05 Seiko Instr & Electronics Sekundenspringer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2034374A2 (de) 2007-09-07 2009-03-11 Lange Uhren GmbH Uhr
EP2034374A3 (de) * 2007-09-07 2009-07-15 Lange Uhren GmbH Uhr
US8038340B2 (en) 2007-09-07 2011-10-18 Lange Uhren Gmbh Timepiece
EP2241945A3 (de) * 2009-04-15 2016-12-21 Patek Philippe SA Genève Chronographenmechanismus und mit diesem Mechanismus ausgerüstete Uhr

Also Published As

Publication number Publication date
DE3063990D1 (en) 1983-08-04
FR2469743A1 (fr) 1981-05-22
EP0029204B1 (de) 1983-06-29
JPS56124077A (en) 1981-09-29
US4408898A (en) 1983-10-11
JPS6133473B2 (de) 1986-08-02
FR2469743B1 (de) 1982-09-17

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