US3893290A - Automatic winding mechanism for watch movements - Google Patents

Automatic winding mechanism for watch movements Download PDF

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Publication number
US3893290A
US3893290A US523749A US52374974A US3893290A US 3893290 A US3893290 A US 3893290A US 523749 A US523749 A US 523749A US 52374974 A US52374974 A US 52374974A US 3893290 A US3893290 A US 3893290A
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US
United States
Prior art keywords
arbor
gear
winding mechanism
wheel
toothing
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
US523749A
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English (en)
Inventor
Josef Fluck
Roland Zaugg
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A Schild SA
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A Schild 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 A Schild SA filed Critical A Schild SA
Application granted granted Critical
Publication of US3893290A publication Critical patent/US3893290A/en
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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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/10—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited
    • G04B5/12—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited acting in one direction only

Definitions

  • Winding mechanisms of this kind are already known. They present the particularity that the movements of the winding weight are utilized to wind the mainspring only when the weight moves in a certain direction. whereas the weight idles when it rotates in the opposite. non-winding direction.
  • Mechanism of this kind have been known for many years now. it was long thought preferable to construct mechanisms equipped with a reverser instead of the unidirectional clutch in order to utilize the movements of the weight regardless of their direction.
  • the development of winding mechanisms with unidirectional clutches was not pursued. and the undirectional clutches of winding mechanisms winding in only one direction still present numerous drawbacks.
  • these known mechanisms comprise coupling members with resilient tongues which exert axially directed forces upon the arbor of the winding weight. and this tends to brake the movements of the weight.
  • the reliability of these known clutches leaves something to be desired.
  • the object of the present invention is therefore to provide an automatic winding mechanism of the type which winds in only one direction and which is equipped with such a unidirectional clutch.
  • the retaining device for the barrel-arbor comprises a clickpinion which cooperates with the wheel-toothing of one of the gears. preferably the first one. of the multiplying gcar-train of the automatic winding mechanism.
  • FIG. I is a top plan view of the mechanism.
  • FIG. 2. is a section taken on the line I
  • the ratchct-wheel 2 is automatically wound by means of a rotary weight I0, a portion of which is shown in FIG. 2.
  • the weight I0 is integral in rotation with an arbor II, to which it is secured by means of a rigid disc 12 and a resilient disc 13.
  • the resilient disc 13 has a circular central opening; it is engaged in a circular recess in the winding weight 10 and around a protruding head of the arbor II and is held in place by the rigid disc 12, which has a keyhole-shaped opening engaging under the protruding head of the arbor II and being blocked under that head.
  • the weight 10 and the arbor 11 are rigidly con nected as long as the torque exerted by the weight I0 does not exceed a given limit. When that limit is reached. the weight 10 can slide beneath the resilient disc 13, thus protecting the transmission mechanism.
  • any other rigid fixing means might be provided between the weight I0 and the arbor II which would cause the arbor II to rotate when the weight 10 moves owing to its heaviness or inertia.
  • a cylindrical bearing surface 14 of the arbor II pivots in a circular opening in the thinnest portion of the bridge 3, and a pivot-shank 15 at the end of the arbor ll remote from the weight pivots in a corresponding opening in the bridge 4.
  • the movements of the oscillating weight 10 and of the arbor 11 are transmitted to the ratchet-wheel 2 by a gear-train comprising a first wheel-and-pinion 16 coaxial with the arbor 11.
  • This wheel-and-pinion consists of a pinion 17, engaged on a cylindrical bearing surface 18 of the arbor 11, and a ring-wheel 19 which has an inner toothing 19a and is secured to the pinion 17.
  • the inner toothing 19a has an odd number of slightly spaced triangular teeth, as may be seen in FIG. 1.
  • the pinion 17 meshes with the wheel of a speed-reducer wheel-and-pinion 20 which pivots between the bridges 3 and 4, and the pinion of which is engaged with the wheel of a wheel-and-pinion 21.
  • the asymmetry of the teeth of the pinion 29 is such that if the wheel of the wheel-and-pinion 20 rotates counterclockwise, as viewed in FIG. 1, two adjacent teeth of the pinion 29 simultaneously come in contact with two adjacent teeth of the wheel 20, and the gearing is blocked by the pressure of the apex of one of the teeth of the click-pinion 29 on the arcuate apex of one of the teeth of the wheel 20. It will be noted that the arcuate apices of these teeth all lie on the circumference of a circle coaxial with the wheel 20. If the wheel 20 rotates clockwise, the relative positioning of the wheel 20 and the click-pinion 29 changes because their respective toothings are engaged with a relatively substantial amount of play.
  • the pinion of the wheel-and-pinion 20 drives the wheel of the wheel-and-pinion 21 counterclockwise, so that the ratchet-wheel 2 is driven clockwise, the ratio of reduction between the speeds of rotation of the weight and the ratchet-wheel, respectively, being about 1:150.
  • the ratchetwheel 2 is likewise equipped with a conventional retaining click which prevents the mainspring from upwinding.
  • the unidirectional clutch device of the mechanism described is mounted coaxially with the arbor ll, its size may be such that it operates reliably and is resis tant to wear without its taking up too much space with respect to the rest of the mechanism.
  • a last advantage of the mechanism described here is that the automatic winding assembly a whole is completely independent of the basic caliber. It thus enables the manufacture of movements to be carried out more efficiently by creating groups of related calibers.
  • a basic caliber without automatic winding may be transformed into an automatic-winding movement simply by adding the assembly, without making any changes in the rest of the movement.
  • said blocking device comprises a click-pinion having an asymmetrical toothing engaged in said toothing of a gear and so disposed that two of its teeth block said gear by butting upon rotation of said gear in one direction. whereas said click-pinion is rotatingly driven upon rotation of said gear in the opposite direction.
  • a winding mechanism in accordance with claim 1. wherein said arbor and the gears of said gear-train are borne by said elements. and said elements are secured to one another and constitute an assembly. said assembly comprising means for positioning it upon and securing it to a watch movement.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Mechanical Operated Clutches (AREA)
US523749A 1973-11-21 1974-11-14 Automatic winding mechanism for watch movements Expired - Lifetime US3893290A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1635773A CH591104A (ja) 1973-11-21 1973-11-21

Publications (1)

Publication Number Publication Date
US3893290A true US3893290A (en) 1975-07-08

Family

ID=4416641

Family Applications (1)

Application Number Title Priority Date Filing Date
US523749A Expired - Lifetime US3893290A (en) 1973-11-21 1974-11-14 Automatic winding mechanism for watch movements

Country Status (7)

Country Link
US (1) US3893290A (ja)
JP (1) JPS5086370A (ja)
CH (2) CH1635773A4 (ja)
DE (1) DE2453124C3 (ja)
FR (1) FR2251855B1 (ja)
GB (1) GB1480369A (ja)
IT (1) IT1025258B (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6354731B1 (en) * 1998-05-07 2002-03-12 Janvier S.A. Oscillating winding weight for a timepiece with an automatic movement and timepiece fitted with such a winding weight
US20100149928A1 (en) * 2008-12-15 2010-06-17 Les Artisans Horlogers Sarl Unit that comprises a winding ratchet that is attached to a barrel arbor and barrel arbor for this unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2264550A1 (fr) * 2009-06-16 2010-12-22 Samep S.A. - Montres Emile Pequignet Roue pour dispositif inverseur, procédé de fabrication d'une telle roue, et dispositifs inverseurs pour mouvement horloger comportant une telle roue

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752751A (en) * 1952-07-12 1956-07-03 Vaucher Eric Automatic winding gear for watches
US2765679A (en) * 1951-02-28 1956-10-09 Bulova Watch Co Inc Unidirectional driving gear
US3838567A (en) * 1973-02-16 1974-10-01 Ebauchesfabrik Eta Ag Unidirectional coupling device for a watch movement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765679A (en) * 1951-02-28 1956-10-09 Bulova Watch Co Inc Unidirectional driving gear
US2752751A (en) * 1952-07-12 1956-07-03 Vaucher Eric Automatic winding gear for watches
US3838567A (en) * 1973-02-16 1974-10-01 Ebauchesfabrik Eta Ag Unidirectional coupling device for a watch movement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6354731B1 (en) * 1998-05-07 2002-03-12 Janvier S.A. Oscillating winding weight for a timepiece with an automatic movement and timepiece fitted with such a winding weight
US20100149928A1 (en) * 2008-12-15 2010-06-17 Les Artisans Horlogers Sarl Unit that comprises a winding ratchet that is attached to a barrel arbor and barrel arbor for this unit
US8038341B2 (en) * 2008-12-15 2011-10-18 Francois Durafourg Unit that comprises a winding ratchet that is attached to a barrel arbor and barrel arbor for this unit

Also Published As

Publication number Publication date
JPS5086370A (ja) 1975-07-11
DE2453124B2 (de) 1977-07-28
CH1635773A4 (ja) 1976-12-15
GB1480369A (en) 1977-07-20
IT1025258B (it) 1978-08-10
DE2453124A1 (de) 1975-05-28
FR2251855A1 (ja) 1975-06-13
CH591104B5 (ja)
DE2453124C3 (de) 1978-03-09
FR2251855B1 (ja) 1976-12-31
CH591104A (ja) 1977-09-15

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