US3879933A - Hand-setting mechanism for back winding watch - Google Patents

Hand-setting mechanism for back winding watch Download PDF

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Publication number
US3879933A
US3879933A US499984A US49998474A US3879933A US 3879933 A US3879933 A US 3879933A US 499984 A US499984 A US 499984A US 49998474 A US49998474 A US 49998474A US 3879933 A US3879933 A US 3879933A
Authority
US
United States
Prior art keywords
hand
setting
gear
winding
winding stem
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.)
Expired - Lifetime
Application number
US499984A
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English (en)
Inventor
Yukio Ikehata
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Application granted granted Critical
Publication of US3879933A publication Critical patent/US3879933A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/02—Mechanical devices for setting the time indicating means by making use of the winding means

Definitions

  • the winding stem is used for winding the watch in its normal winding position and is displaceable axially by a crown thereon for coupling a transmission gear driven by the winding stem to a handsetting gear of a hand-setting gear train for setting the hands of a watch.
  • Semi-automatic means in the form of a spring biasing one of the two gears to be coupled by axial movement under control of the spring is enabled when the winding stem is displaced to its handsetting position and disenabled when it is returned to its normal winding position.
  • a hand-setting operation is effected by a transmission gear mounted on the end of a hand-setting stem which meshes with a setting gear or an intermediate gear which drives the minute gear when the winding crown on the stem is pulled up.
  • These known watches have several problems in that the transmission gear fails to mesh with the handsetting gear or intermediate setting gear when the teeth of the two gears are out of phase in respect to meshing with each other.
  • the transmission gear is generally fixedly mounted on the winding stern and the handsetting gear or intermediate setting gear to be coupled to the transmission gear is not axially displaceable or slidable. Therefore if the gears are out of phase for meshing of the two gears when the winding stem is pulled upwardly it can only be displaced to a halfway position.
  • Another object of the present invention is to provide a hand-setting mechanism in which the winding stem is axially movable to two operative positions without restriction even if gears to be coupled thereby are out of phase for being coupled.
  • a watch is provided with a hand-setting mechanism comprising the winding stern of the watch which is axially displaceable from a winding first position to a hand-setting second position.
  • the winding stem is activated by a crown for axially displacing it and rotating it.
  • a transmission gear is rotatably driven by the winding stem and a handsetting gear train has a hand-setting gear therein coupleable to the transmission gear.
  • Semi-automatic means enabled by the winding stem to couple the transmission gear and hand-setting gear are provided. This semi-automatic means is enabled to couple the transmission gear and the hand-setting gear even when the teeth of the transmission gear and hand-setting gear are out of phase for meshing.
  • Spring means provided bias one of the two gears that are to be coupled into engagement once the gear teeth thereof are in phase for meshing or coupling.
  • FIG. I is a fragmentary cross section view of a watch embodying a hand-setting mechanism according to the invention.
  • FIG. 2 is a second embodiment of a watch embodying a hand-setting mechanism according to the invention.
  • FIG. I a rotatable winding stem I is slidable axially in opposite directions and carries a winding crown 2 at its outer end which is outside of a watch casing member 3, for example a back cover. Inside of the casing the winding stem passes axially through openings in a barrel bridge 4 and plate 5. An inner portion of the winding stem is provided with a square stem portion lb through an interconnecting intermediate step portion la.
  • a transmission gear 6 is slidably mounted for axial movement on the winding stem square portion lb that is rotatable with the winding stem when it is rotatably driven.
  • a spring 7 disposed under the inner or lower surface of the transmission gear 6 urges the transmission gear on the stem in a direction toward the crown of the winding stern so that the transmission gear resiliently abuts on the step portion la of the winding stern.
  • An intermediate hand-setting gear 8 of a hand-setting gear train is rotatably mounted between the plate 5 and a setting lever spring 9 so as to mesh with the transmission gear whenever the winding stem 1 is pulled out for setting the hands of the watch.
  • a hand-setting gear 10 of a hand-setting gear train meshes with the intermediate or hand-setting gear 8 and likewise meshes with a minute gear 11.
  • the winding stem has thereon a winding gear 12 rotational on the winding stem for winding a ratchet gear wheel 13 that meshes therewith.
  • the winding gear 12 has ratchet teeth which mesh with a clutch gear 14 which rotates with the stern when the winding crown is rotated in the winding position illustrated in the drawing. This clutch is biased toward engagement and disengages or declutches from the winding gear 12 when the winding crown 2 is pulled upwardly from its winding or first position to a hand-setting or second position.
  • a collar on the winding stem moves it upwardly.
  • the winding crown 2 is pulledoutwardly from the first position shown to a second or hand-setting position.
  • the winding stem moves axially upwards as shown in the drawing or outwardly of the watch and at the same time the transmission gear 6 is biased axially of the stem by the spring 7.
  • the peripheral teeth of the transmission gear 6 are moved into engagement with the peripheral teeth of the intermediate gear 8 and both mesh smoothly with each other without hinderance once the gears are in the proper phase for meshing.
  • the winding stem 1 can be completely moved to its second axial position in spite of the transmission gear 6 being stopped in its axial travel at a time when it strikes against the intermediate gear 8 if the respective gear teeth of both gears are out of phase for meshing at the time since the transmission gear 6 is axially slidable on the winding stem.
  • the winding crown 2 can be rotated and the transmission gear 6 rotates together with the winding stem because it has an opening which is square in configuration into which the square portion lb of the winding stem fits.
  • the transmission gear 6 is properly lined-up with the intermediate gear 8 and the transmission gear is moved automatically into engagement with the hand-setting or intermediate gear 8 by the action of the spring 7 at a point where the teeth are in the proper phase for meshing. Whereby the cou pling is automatically rendered effective by the winding stem.
  • FIG. 1 A second embodiment of a watch embodying a handsetting mechanism according to the invention as illustrated in FIG. 1.
  • the parts corresponding to those of FIG. 1 have corresponding reference numerals which are primed.
  • a winding stem 1 is mounted in a watch extending thereto through a barrel bridge 4' and has a transmission gear 6' fixed thereto so that this gear is unable to slide axially relative the winding stem.
  • An intermediate hand-setting wheel 8' is pivotly mounted, between the barrel bridge 4' and setting lever spring 9', on an axle 15.
  • a spring 7' is disposed in a space defined between the intermediate hand-setting gear 8' and the axle 15.
  • the upper end of the spring 7 abuts on a shoulder a of the axle 15 while its lower end abuts on a washer 8'c of the intermediate hand-setting gear 8 provided with a set of lower peripheral teeth 8'b so that the lower surface of the intermediate hand-setting gear 8' is urged to resiliently abut against stop 16 which is mounted on the axle 15.
  • the intermediate hand-setting 8' is provided with upper peripheral teeth 8a.
  • the lower teeth 8'b of the intermediate hand-setting gear 8 ordinarily mesh with the hand-setting gear 10' which meshes with a minute gear 11'.
  • the stop 16 insures that the engagement position of the transmission gear with the upper teeth 8'a of the intermediate hand setting gear 8' takes place.
  • the intermediate hand-setting gear 8' is lifted against the action of the spring 7 since it is slidable axially onthe axle 15.
  • the winding stem 1 can be moved freely from its first position shown in the drawing to its second or hand-setting position.
  • the intermediate hand-settinglgear 8 which is usually biased downwardly by thespring 7' moves axially to a position against the stop 16, is automatically coupled to the transmission gear whereby the hand-setting may be effected.
  • the back winding watch provided with the hand-setting mechanism of the invention is provided with semi-automatic means for engaging the intermediate hand-setting gear with the transmission gear after the winding stem has been moved upwardly even if the teeth of the two gears are out of phase for meshing when the winding crown is pulled out to set the hands.
  • This is accomplished since either the transmission gear or the intermediate hand-setting gear are relatively axially slidable relative to a corresponding pivot shaft and are biased for automatic coupling by means of spring which urges either one of them to engage with the other gear. Therefore the inconveniences and drawbacks of the prior art mentioned above are entirely eliminated.
  • said semi-automatic means comprises means on said winding stem mounting said transmission gear for axial movement relative to said winding stem and for rotation therewith, and a spring biasing the transmission gear axially toward the crown on said stem.
  • said transmission gear' is fixed to said winding stem for movement therewith
  • said semi-automatic means comprises means mounting said hand-setting gear for axial movement and rotation thereon, and a spring biasing the'ha'nd-setting gear axially in a direction for meshing with said transmission gear.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US499984A 1973-08-24 1974-08-23 Hand-setting mechanism for back winding watch Expired - Lifetime US3879933A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48094337A JPS5044865A (fr) 1973-08-24 1973-08-24

Publications (1)

Publication Number Publication Date
US3879933A true US3879933A (en) 1975-04-29

Family

ID=14107457

Family Applications (1)

Application Number Title Priority Date Filing Date
US499984A Expired - Lifetime US3879933A (en) 1973-08-24 1974-08-23 Hand-setting mechanism for back winding watch

Country Status (5)

Country Link
US (1) US3879933A (fr)
JP (1) JPS5044865A (fr)
DE (1) DE2440247A1 (fr)
FR (1) FR2241816A1 (fr)
GB (1) GB1442708A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362395A (en) * 1979-10-19 1982-12-07 Corum, Ries, Bannwart & Co. Device for winding and setting a timepiece
EP0108412A1 (fr) * 1982-11-09 1984-05-16 Omega SA Dispositif de mise à l'heure
US20070025191A1 (en) * 2005-07-26 2007-02-01 Montres Breguet Sa Control stem device for a watch
US20140341004A1 (en) * 2013-05-17 2014-11-20 Julian VON BURG Watchcase
US20200356058A1 (en) * 2015-04-01 2020-11-12 Rolex Sa Mechanism for rewinding and/or correcting at least one clock function and device for selecting a clock function

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH642512B (fr) * 1980-10-24 Ebauchesfabrik Eta Ag Dispositif mecanique de mise a l'heure d'une montre a affichage analogique.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1476494A (en) * 1923-01-24 1923-12-04 Nathan S Cooper Stem-winding and stem-setting watch
US2253711A (en) * 1937-08-25 1941-08-26 Anthony P Kearns Change speed gearing
US3064415A (en) * 1960-06-21 1962-11-20 Movado Montres Arrangement for the winding and timesetting of a watch
US3499280A (en) * 1966-05-13 1970-03-10 Erard Raoul Henri Winding and setting pinions mounted in case independent of movement
US3555919A (en) * 1967-09-13 1971-01-19 Tuman S C A Combined marine box

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1476494A (en) * 1923-01-24 1923-12-04 Nathan S Cooper Stem-winding and stem-setting watch
US2253711A (en) * 1937-08-25 1941-08-26 Anthony P Kearns Change speed gearing
US3064415A (en) * 1960-06-21 1962-11-20 Movado Montres Arrangement for the winding and timesetting of a watch
US3499280A (en) * 1966-05-13 1970-03-10 Erard Raoul Henri Winding and setting pinions mounted in case independent of movement
US3555919A (en) * 1967-09-13 1971-01-19 Tuman S C A Combined marine box

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362395A (en) * 1979-10-19 1982-12-07 Corum, Ries, Bannwart & Co. Device for winding and setting a timepiece
EP0108412A1 (fr) * 1982-11-09 1984-05-16 Omega SA Dispositif de mise à l'heure
CH649674GA3 (fr) * 1982-11-09 1985-06-14
US20070025191A1 (en) * 2005-07-26 2007-02-01 Montres Breguet Sa Control stem device for a watch
US7563020B2 (en) * 2005-07-26 2009-07-21 Montres Breguet Sa Control stem device for a watch
CN1904770B (zh) * 2005-07-26 2010-06-09 蒙特雷布勒盖股份有限公司 用于手表的控制柄轴装置
US20140341004A1 (en) * 2013-05-17 2014-11-20 Julian VON BURG Watchcase
CN104166341A (zh) * 2013-05-17 2014-11-26 J.R.国际有限公司 表壳
US9658602B2 (en) * 2013-05-17 2017-05-23 J.R. International Gmbh Watchcase with manually rotatable ring
CN104166341B (zh) * 2013-05-17 2018-10-16 J.R.国际有限公司 表壳
US20200356058A1 (en) * 2015-04-01 2020-11-12 Rolex Sa Mechanism for rewinding and/or correcting at least one clock function and device for selecting a clock function

Also Published As

Publication number Publication date
DE2440247A1 (de) 1975-02-27
GB1442708A (en) 1976-07-14
JPS5044865A (fr) 1975-04-22
FR2241816A1 (fr) 1975-03-21

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