US3916615A - Winding mechanism for back winding watch - Google Patents

Winding mechanism for back winding watch Download PDF

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Publication number
US3916615A
US3916615A US500860A US50086074A US3916615A US 3916615 A US3916615 A US 3916615A US 500860 A US500860 A US 500860A US 50086074 A US50086074 A US 50086074A US 3916615 A US3916615 A US 3916615A
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US
United States
Prior art keywords
winding
gear
stem
rotation
axially
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
US500860A
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English (en)
Inventor
Katsutoshi Maeda
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 US3916615A publication Critical patent/US3916615A/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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/04—Rigidly-mounted keys, knobs or crowns
    • G04B3/043—Locking of the operating element, also by mounting in a concealed place

Definitions

  • ABSTRACT A winding mechanism for watches particularly back [21] Appl 500860 winding watches in which a winding stem has a winding gear rotational thereon provided with ratchet [30] Foreign Application P iority D t teeth. The winding gear meshes with a ratchet gear at Aug. 28, 1973 Japan 48-96462 all times- A Clutch gear is mounted for rotation with the winding stem and is axially slidable thereon. It is 52 US. 01. 58/68 biased by a Spring toward engagement with the ratchet 51 int. (31.
  • FIG. 2 1 A first figure.
  • This invention relates generally to a winding mechanism for a watch and more particularly to back winding watches and winding mechanisms therefore.
  • a winding gear is mounted on the winding stem and is engaged with a ratchet gear in a winding position of the winding crown and stem.
  • the winding gear is disengaged from the ratchet gear when the winding crown and stem are pulled axially to a hand-setting position.
  • trouble is encountered in coupling or engaging the winding gear with the ratchet gear teeth.
  • Another object of the present invention is to provide the winding mechanism for a thin-type back winding watch having a winding crown which may be reversely rotated and generates a sound signal to prevent damage of the gears.
  • the watch winding mechanism in accordance with the invention has a winding stem mounted for rotation and movable axially from a winding first position to a hand-setting second position.
  • a clutch gear is mounted coaxially with the winding gear and is axially slidable on the winding stem for rotation therewith.
  • Spring means constantly, resiliently biases the clutch gear axially of the winding stem in a direction for meshing with the driving gear clutch teeth.
  • the spring means allows the clutch gear to be displaced axially away from the clutch if the clutch gear is rotated by the winding stem in a direction opposite to the winding direction for winding the winding mechanism.
  • Means are provided on the winding stem to displace the clutch gear axially away from the winding gear against the biasing force of the spring means, when the winding stem is moved axially to its second position.
  • FIG. 1 is a fragmentary elevation view, partly in section, of a watch with a watch winding mechanism according to the invention.
  • FIG. 2 is a fragmentary elevation view, partly in section, of a second watch embodiment with a second embodiment of a winding mechanism in accordance with the invention.
  • FIG. 1 a winding stem 1 is rotationally and axially slidable in a watch structure.
  • the winding stem 1 is provided with a winding crown 2 secured to the winding stem 1 in a conventional manner and having a cylindrical portion 2a.
  • the winding stem extends axially through openings in a casing member 3, a barrel bridge 4 and a plate 5.
  • a round portion 1a thereof is rotatable in the barrel bridge.
  • the watch is provided with a hand-setting mechanism for setting the hands, not shown, of the watch comprising a hand-setting or intermediate gear 6 meshing with a gear train including a minute gear for setting the hands.
  • the intermediate gear 6 is actuated by a transmission gear 7 rotated by the winding stem 1 when it is in a hand-setting mode.
  • the winding mechanism comprises a winding gear 8 mounted for rotation on the winding stem 1 and has ratchet teeth 8a on an upper surface thereof with peripheral teeth meshing with a ratchet gear 10 that is used for winding the winding spring in the watch.
  • the ratchet gear 10 is constantly in mesh with the winding gear 8.
  • the winding gear 8 is protected by a winding gear guard 9 secured on the barrel bridge 4 and serves to control the axial movement of the winding wheel or gear 8 as later described.
  • the mechanism In order to wind the winding mechanism, the mechanism is provided with a clutch gear 11 mounted coaxially with the winding gear 8 and having teeth for meshing with the ratchet teeth 8a of the winding gear.
  • the clutch gear 11 is mounted on a square or rectangular cross-section portion 1b of the winding stem 1 for rotation with the winding stem and to allow axial movement of the clutch gear relative the winding stem.
  • the clutch gear 11 is biased by biasing spring 12 in a direction for meshing it with the clutch teeth of the winding gear.
  • the spring 12 is disposed within the cylindrical or tubular portion 2a of the crown 2. This reduces the thickness of the watch.
  • the crown 2 and winding stem 1 are pulled outwardly and the transmission gear 7 is meshed or engaged with the intermediate hand-setting gear 6 for setting the hands.
  • a collar 10 lifts the clutch gear 11 from engagement with the winding gear 8v against the biasing force of the spring 12 so that rotation of the crown for setting the hands does not affect the winding mechanism.
  • the winding mechanism When the winding stem is in the position illustrated in FIG. 1 the winding mechanism can be wound by rotating the winding stem into an angular position in which the clutch gear engages with the winding gear under the control of its biasing spring and the winding mechanism is accordingly wound.
  • the clutch gear teeth of the winding gear 8 cause the clutch gear 11 to move away axially from the winding gear against the resiliency of the spring 11 to prevent damage to the gears and winding mechanism.
  • a sound signal is effected.
  • the collar 1c of the winding stem engages a stepped portion 11a of the clutch wheel.
  • the clutch wheel or gear is moved against the resiliency of the spring 12.
  • the winding gear guard .9 prevents the winding gear 8 from moving with the winding stem in an axial direction wherebythe winding gear 8 is constantly kept in engagement with the ratchet gear 10 during the hand-setting operation.
  • the crown 2 is returned to the position as shown in FIG. 1 and the clutch gear 11 is biased by the spring 12 so that it again meshes with the ratchet teeth 8a of the winding gear 8 whenever the gears are in angular phase for this engagement.
  • FIG. 2 A second embodiment of the invention is illustrated in FIG. 2.
  • a winding stem 1' has a rectangular or square cross-section l'b and a crown not shown. It extends axially through a casing member, not shown, a barrel bridge 4 and a plate 5'.
  • the winding stem 1 drives a hand-setting mechanism having a hand-setting or intermediate gear 6' which is driven by a transmission gear 7 mounted on the winding stem 1 when it is moved to a hand winding position upwardly.
  • a winding mechanism is provided in. the present invention similarily to the first embodiment.
  • a winding gear 8' is rotationally mounted on the winding stem and meshes continuously with a winding gear
  • a clutch gear 11 is provided and in this instance is disengaged from the winding gear by a shoulder 1d which engages a shoulder ll'a of the clutch gear when a hand-setting operation is effected.
  • a guard plate 9' keeps the winding gear 8 meshing with the ratchet gear 10.
  • the clutch gear 11 is in this instance biased by a plate spring 12 which has a portion biasing the clutch gear and is anchored as shown to the watch.
  • a hand-setting gear 6' meshes with a transmission gear during a hand-setting operation as described before as to, the first embodiment.
  • the crown may be rotated in opposite directions without any problem. Moreover, it is possible to lessen the thickness of the watch because the spring 12 is housed in the-winding crown 2 or in a watch case as shown in FIG. 2. Shocks on the winding crown are absorbed by the winding gear 8 and the barrel bridge 4 by means of the flange 1c of the winding stem so that damage to the watch movement can be eliminated.
  • a winding mechanism comprising a winding stem mounted for rotation for winding a watch-winding mechanism in a winding first position and movable axially to a hand-setting second position for rotation for setting hand-setting mechanism, a winding crown mounting said winding stem for rotation and axial movement, a winding gear mounted for rotation about said winding stem and having peripheral teeth and ratchet teeth, a ratchet gear meshing with the peripheral teeth of said winding gear, a clutch gear mounted coaxially with said winding gear and axially slidable on said winding stem for rotation therewith, spring means housed in a space defined between said winding stem and said winding crown and constantly resiliently biasing the clutch gear axially on said winding stem in a direction for meshing with said ratchet teeth of the winding gear and allowing said clutch gear to be displaced axially away from said winding gear when said crown is rotated in a direction opposite to a winding direction for winding said winding
  • a winding mechanism according to claim I including guard means for preventing said winding gear from moving axially with said stern, whereby said winding gear and said ratchet gear mesh at all times.
  • a winding stem mounted for rotation for winding a watch-winding mechanism in a winding first position and movable axially to a hand-setting second position for rotation for setting hand-setting mechanism, means mounting said winding stem for rotation and axial movement, said winding mechanism comprising a winding gear mounted for rotation about said winding stem and having peripheral teeth and ratchet teeth, a ratchet gear meshing with the peripheral teeth of said winding gear, a clutch gear mounted coaxially with said winding gear axially slidable on said winding stem for rotation therewith; spring means constantly resiliently biasing the clutch gear axially on said winding stem in a direction for meshing with said driving gear clutch teeth and allowing said clutch gear to be displaced axially away from said clutch gear if said clutch gear is rotated by said winding system in a direction opposite to a winding direction for winding said winding mechanism, means on said winding stem to displace said clutch gear axially away from said winding gear against a biasing force
  • a winding stem mounted for rotation for wind-ng a watch-winding mechanism in a winding first position and movable axially to a hand-setting second position for rotation for setting hand-setting mechanism, means mounting said winding stern for rotation and axial movement, said winding mechanism comprising a winding gear mounted for rotation about said winding stem and having peripheral teeth and ratchet teeth, a ratchet gear meshing with the peripheral teeth of said winding gear, a clutch gear mounted coaxially with said winding gear axially slidable on said winding stem for rotation therewith, spring means constantly resiliently biasing the clutch gear axially on said winding stem in a direction for meshing with said driving gear clutch teeth and allowing said clutch gear to be displaced axially away from said clutch gear if said clutch gear is rotated by said winding system in a direction opposite to a winding direction for winding said winding mechanism, means on said winding stem to displace said clutch gear axially away from said winding gear against a bias
  • a winding stem mounted for rotation for winding a watch-winding mechanism in a winding first position and movable axially to a hand-setting second position for rotation for setting hand-setting mechanism; means mounting said winding stem for rotation displaced axially away from said clutch gear if said clutch gear is rotated by said winding system in a direction opposite to a winding direction for winding said winding mechanism, means on said winding stem to displace said clutch gear axially away from said winding gear against a biasing force of said spring means when said winding stem is moved axially to said second position thereof, and said spring means comprising a spring housed in said crown.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Pinball Game Machines (AREA)
  • Sanitary Thin Papers (AREA)
  • Mechanical Operated Clutches (AREA)
US500860A 1973-08-28 1974-08-27 Winding mechanism for back winding watch Expired - Lifetime US3916615A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48096462A JPS5046161A (de) 1973-08-28 1973-08-28

Publications (1)

Publication Number Publication Date
US3916615A true US3916615A (en) 1975-11-04

Family

ID=14165683

Family Applications (1)

Application Number Title Priority Date Filing Date
US500860A Expired - Lifetime US3916615A (en) 1973-08-28 1974-08-27 Winding mechanism for back winding watch

Country Status (6)

Country Link
US (1) US3916615A (de)
JP (1) JPS5046161A (de)
CH (1) CH607739B (de)
DE (1) DE2440248A1 (de)
FR (1) FR2242713A1 (de)
GB (1) GB1442709A (de)

Cited By (4)

* 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
US4459033A (en) * 1981-04-16 1984-07-10 Ebauches Electroniques S.A. Timepiece with improved pivots for pivotable members and method of assembly
CN104597738A (zh) * 2013-10-30 2015-05-06 里什蒙国际股份有限公司 用于计时器的固定和分度装置
RU2557403C1 (ru) * 2011-09-15 2015-07-20 Бланпэн Са Узел пружинного барабана часового механизма с сердечником уменьшенного диаметра

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US644381A (en) * 1899-08-02 1900-02-27 Adolf Reisser Stem-winding watch.
US739089A (en) * 1903-03-10 1903-09-15 Christopher Kuenzel Stem winding and setting watch.
US771227A (en) * 1904-04-19 1904-10-04 Francois Celestin Alfred Blanc Winding and setting mechanism for watches.
US2412493A (en) * 1945-04-23 1946-12-10 Hamilton Watch Co Timepiece setting mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040513A (en) * 1959-03-26 1962-06-26 Ebauches Sa Winding and setting device for watches

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US644381A (en) * 1899-08-02 1900-02-27 Adolf Reisser Stem-winding watch.
US739089A (en) * 1903-03-10 1903-09-15 Christopher Kuenzel Stem winding and setting watch.
US771227A (en) * 1904-04-19 1904-10-04 Francois Celestin Alfred Blanc Winding and setting mechanism for watches.
US2412493A (en) * 1945-04-23 1946-12-10 Hamilton Watch Co Timepiece setting mechanism

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
US4459033A (en) * 1981-04-16 1984-07-10 Ebauches Electroniques S.A. Timepiece with improved pivots for pivotable members and method of assembly
RU2557403C1 (ru) * 2011-09-15 2015-07-20 Бланпэн Са Узел пружинного барабана часового механизма с сердечником уменьшенного диаметра
CN104597738A (zh) * 2013-10-30 2015-05-06 里什蒙国际股份有限公司 用于计时器的固定和分度装置
CN104597738B (zh) * 2013-10-30 2018-06-29 里什蒙国际股份有限公司 用于计时器的固定和分度装置

Also Published As

Publication number Publication date
GB1442709A (en) 1976-07-14
CH607739GA3 (de) 1978-10-31
FR2242713A1 (de) 1975-03-28
JPS5046161A (de) 1975-04-24
DE2440248A1 (de) 1975-03-06
CH607739B (fr)

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