US3131531A - Winding device for watches with both a manual winding and a self-winding mechanism - Google Patents

Winding device for watches with both a manual winding and a self-winding mechanism Download PDF

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Publication number
US3131531A
US3131531A US107970A US10797061A US3131531A US 3131531 A US3131531 A US 3131531A US 107970 A US107970 A US 107970A US 10797061 A US10797061 A US 10797061A US 3131531 A US3131531 A US 3131531A
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United States
Prior art keywords
winding
pinion
circular pitch
self
manual
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Expired - Lifetime
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US107970A
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English (en)
Inventor
Stamm Heinrich
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Individual
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Individual
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    • 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
    • G04B7/00—Combined normal and automatic winding up
    • 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
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • 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
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/027—Wheels; Pinions; Spindles; Pivots planar toothing: shape and design
    • 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

Definitions

  • This invention relates to winding devices for watches with both a manual winding and a self-winding mechanism and in particular to winding devices comprising a gear train composed of a manual winding pinion set on 'the winding stem, a crown wheel, a ratchet wheel and a driving pinion belonging to a self-winding gear train.
  • winding devices of this type which are known in the art, the axis of rotation of the manual winding pinion is perpendicular to that of the crown wheel which is meshing with said manual winding pinion.
  • the ratchet wheel which is secured on to the barrel arbor, it is meshing, on the one hand, with the crown wheel so as to enable its actuation by hand through said manual winding pinion and, on the other hand, with said driving pinion of the self-winding gear train, so as to bedriven'under the action of the self-winding mechanism.
  • the manufacture of a device of the type aforementioned has however to deal with a particular difficulty due to the meshing conditions to satisfy, on the one hand, between the manual winding pinion and the crown wheel and, on the other hand, between the self-winding pinion and the ratchet wheel.
  • the toothings of the crown wheel and of the manual winding pinion meshing therewith should preferably have a relatively great circular pitch, since these two gears are perpendicular to one another. With a crown wheel having a relatively great circular pitch the ratchet wheel and consequently the pinion of the self-winding mechanism meshing therewith also have till now been given toothings with the same circular pitch.
  • the driving pinion of the self-winding mechanism should, however, be provided with a toothing having a relatively small circular pitch, the ratchet wheel thereby obviously having the same small circular pitch.
  • the second solution which has already been proposed in the art consists in mounting two ratchet wheels above and coaxially to one another, one of said ratchet wheels being provided with a toothing having a great circular pitch and meshing with the crown wheel and the other ratchet wheel having a small circular pitch and meshing with the self-winding pinion driving the same.
  • the above-mentioned difficulty is satisfactorily solved as far as the meshing conditions of 3,131,531 Patented May 5, 1964 increase of the watch movement total height.
  • a more specific object of this invention consists in providing the crown wheel with a toothing having a circular pitch equal to a multiple of that of the toothing of the ratchet wheel.
  • the single figure is a diagrammatic plan view of said embodiment.
  • the winding device represented in the drawings belongs to a watch provided both with a manual winding mechanism and with a self-winding mechanism.
  • the manual winding mechanism comprises a pinion 1 located in the usual manner on a conventional winding and hand setting stem, the axis of which is perpendicular to that of the crown wheel 2 meshing with pinion 1, as with usual watch movements.
  • the toothing of crown wheel 2 meshes in turn with that of a ratchet wheel 3, which is secured as usual on to the barrel arbor (not shown) of the watch movement.
  • the ratchet wheel 3 itself meshes with a driving pinion 4-belonging to a gear train (not shown) forming part of said self-winding mechanism.
  • the toothing of crown wheel 2 has a circular pitch twice as great as that of the toothing of ratchet wheel 3, so that only every second tooth of the ratchet wheel 3 is engaged by the teeth of the crown wheel.
  • the crown wheel 2 and the ratchet wheel 3 have such diameters that this meshing arrangement is amply suflicient to ensure a satisfactory driving of the ratchet wheel 3 by means of the crown wheel 2 when the watch is wound manually through pinion 1.
  • These meshing conditions between the crown wheel and the ratchet wheel now enable providing very satisfactory meshing conditions between the crown wheel 2 and the manual winding pinion 1 since these two gears can be made with toothings having a relatively great circular pitch.
  • the toothing of crown wheel 2 can advantageously be obtained in the following manner: This crown wheel is first provided with a toothing corresponding exactly to that of the ratchet wheel, i.e. with a toothing having the same circular pitch as the ratchet wheel toothing. Every second tooth of the crown wheel is then cut, milled or punched out while providing notches 2a in wheel 2. As it may be observed in the drawings, the side edges 2b of said notches are almost parallel to one another and each extend from the root of one of the adjoining remaining teeth of the crown wheel.
  • the circular pitch ratio between the crown wheel toothing and the ratchet wheel toothing can, of course, also be chosen different from 2:1, the circular pitch of the crown wheel being, however, obviously always an integer multiple of the circular pitch of the ratchet wheel. It said ratio has for some reason to be greater than 2:1, the crown wheel can also be made by firstly providing it with a toothing corresponding to that of the ratchet wheel and by then cutting, milling or punching out an appropriate number of teeth to obtain the desired ratio between the circular pitches of said wheels.
  • the winding mechanism improved in accordance with this invention has still'a further advantage.
  • the meshing conditions between the manual winding pinion and the crown wheel are here even better than with the usual manual winding mechanisms in which said gears are provided with toothings having a relatively great circular pitch, because the conventional toothings, which are usually formed with involute teeth, are not very advantageous in the case of two wheels or pinions meshing at a right angle with one another.
  • the teeth of said gears are, of course, engaging one another along their edges thus causing a great wear of the same.
  • the involute teeth of the manual windingpinion 1 mesh with the parallel edges of the remaining teeth of the crown wheel 2 thus ensuring much better meshing conditions between these two gears than with conventional devices.
  • a Winding device including a manual winding mechanism and a self-winding mechanism, the winding device comprising a first winding ing mechanism and having a predetermined great circular pitch and an axis of rotation, said first winding toothed pinion having involute teeth a toothed crown wheel meshing with said first winding pinion and having a circular pitch equal to said predetermined great circular pitch and an axis of rotation perpendicular to said axis of rotation of said first winding toothed pinion, a toothed ratchet wheel meshing with said crown wheel and having a predetermined small circular pitch an aliquot part of said predetermined great circular pitch and an axis of rotation in parallel relation to said axis of rotation of said toothed crown Wheel, and a second winding toothed pinion operatively connected to the self-winding mechanism and having a circular pitch equal to said predetermined small circular pitch, said second winding pinion meshing with said ratchet wheel.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Gears, Cams (AREA)
US107970A 1960-05-06 1961-05-05 Winding device for watches with both a manual winding and a self-winding mechanism Expired - Lifetime US3131531A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH519360A CH362367A (de) 1960-05-06 1960-05-06 Aufzugräderwerk für Selbstaufzuguhr mit Handaufzug
CH3131531X 1960-05-06

Publications (1)

Publication Number Publication Date
US3131531A true US3131531A (en) 1964-05-05

Family

ID=61800696

Family Applications (1)

Application Number Title Priority Date Filing Date
US107970A Expired - Lifetime US3131531A (en) 1960-05-06 1961-05-05 Winding device for watches with both a manual winding and a self-winding mechanism

Country Status (5)

Country Link
US (1) US3131531A (de)
CH (1) CH362367A (de)
DE (1) DE1204146B (de)
FR (1) FR1288562A (de)
GB (1) GB903753A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983691A (en) * 1974-11-01 1976-10-05 A. Schild S.A. Winding and setting mechanism for watch movements

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211885B (de) * 1962-11-29 1966-03-03 Zeiss Ikon Ag Zahngesperre fuer Transportgetriebe u. dgl.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH289759A (fr) * 1951-05-02 1953-03-31 Rolex Montres Montre-bracelet à remontage automatique.
FR1055696A (fr) * 1951-05-18 1954-02-22 Dispositif de remontage automatique pour montre

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2928231A (en) * 1955-10-11 1960-03-15 Epple Kg Otero Uhren Automatic winding device, preferably for wrist-watches
DE1080809B (de) * 1956-06-27 1960-04-28 D Inv S Et De Brevets S E I B Rollenzaehlwerke, insbesondere fuer Fluessigkeitszapfvorrichtungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH289759A (fr) * 1951-05-02 1953-03-31 Rolex Montres Montre-bracelet à remontage automatique.
FR1055696A (fr) * 1951-05-18 1954-02-22 Dispositif de remontage automatique pour montre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983691A (en) * 1974-11-01 1976-10-05 A. Schild S.A. Winding and setting mechanism for watch movements

Also Published As

Publication number Publication date
FR1288562A (fr) 1962-03-24
GB903753A (en) 1962-08-22
CH362367A (de) 1962-02-15
DE1204146B (de) 1965-10-28

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