US3827235A - Winding and setting mechanism for watches - Google Patents

Winding and setting mechanism for watches Download PDF

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Publication number
US3827235A
US3827235A US00370672A US37067273A US3827235A US 3827235 A US3827235 A US 3827235A US 00370672 A US00370672 A US 00370672A US 37067273 A US37067273 A US 37067273A US 3827235 A US3827235 A US 3827235A
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United States
Prior art keywords
wheel
winding
crown wheel
stem
setting
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Expired - Lifetime
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US00370672A
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English (en)
Inventor
P Bachmann
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.)
Ebauches Bettlach SA
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Ebauches Bettlach SA
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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
    • 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

  • PATENTEDAUG 61974 sum 2 OF 3 WINDING AND SETTING MECHANISM F WATCHES BACKGROUND OF THE INVENTION
  • Winding and setting mechanisms are already known in which the clutch pinion is provided with two opposing crown toothings and is fastened on the stem.
  • the toothing facing the center of the movement meshes with one of the toothings of a ratchet-driving runner when the stem is in winding position, while the other toothing comes into engagement with the setting wheel located in the vicinity of the periphery of the movement when the stem is brought into the outer position.
  • the ratchet-driving runner is formed of several parts and has a unidirectional clutch.
  • automatic winding watch movements are in general provided with an ordinary winding and setting mechanism which, however, in addition comprises a device for the unclutching of the crown wheel so as to prevent the clutch pinion and the stem from being driven in rotation when the automatic winding mechanism actuates the ratchet wheel of the barrel.
  • Some of these unclutching devices comprise a sliding crown wheel which can move in its plane while remaining in engagement with the winding pinion.
  • Thepresent invention provides a winding and setting mechanism for watch movements which is of a quite simple construction and the mounting of which is rapid and can be simply effected.
  • the mechanism of this invention nevertheless assures the functions of an ordinary mechanism, that is to say, permits manual winding when the stem is, in an inner position and setting when the stem is in outer position.
  • the winding and setting mechanism for watch movements in accordance with the invention is characterized by a drive pinion which is rigidly connected with the stem, by a sliding crown wheel mounted between the drive pinion and the center of the movement and cooperating with the winding ratchet wheel of the drive spring, and by a setting wheel mounted between the drive pinion and the periphery of the movement.
  • FIG. 1 is a top plan view
  • FIG. 2 is a sectional view along the axis of the stem
  • FIG. 3 is a sectional view along the line lII-Ill of FIG. I.
  • FIGS. 4 and 5 are sectional views along the lines IVIV and V-V, respectively, of FIG. 1.
  • FIG. 2 The main elements of the winding and setting mechanism shown in the drawing can be noted from FIG. 2.
  • a part of the pillar plate 1 of a watch movement and, above this plate, the barrel bridge 2 and the cock 3.
  • the elements of the winding mechanism that is to say, a stem 4 which constitutes the inner part of a drive device of the so-called broken stem type, the different parts of which will be described further below, a sliding crown wheel 5, a setting wheel 6 and a spring plate 7 which assures the positioning of the stem in the axial direction and at the same time serves as a click spring, as will be seen further below.
  • the cock 3 is fastened on the pillar plate 1 by a pillar 8 and a screw 38 (FIG. 5) in accordance with an ordinary arrangement; the same is true of the barrel bridge 2, the fastening pillar 9 being combined with the pivoting device of the click it). The latter acts on the ratchet wheel 11.
  • the cock 3 is located at a level slightly below that of the barrel bridge 2. Between the cock and the pillar plate, on the one hand, and between the barrel bridge and the pillar plate, on the other, are arranged two out plates which assure the spacing apart of these frame elements and constitute an outer support bracket 12 and an inner support bracket 13. These two out plates, visible in plan view in FIGS.
  • protrusions in their upper portions and their lower portions; the protrusion 14, which is arranged at the upper portion of the inner bracket 13, is of square cross section (FIG. 1).
  • the upper part of this protrusion penetrates into an opening provided in the barrel bridge 2 and, at its lower end, this protrusion connects with a flat portion of the plate 13 which forms two shoulders 15 and 16.
  • These shoulders support a crown core 17 which is a cutout part of circular shape having a small flat collar at its base and at its center a circular hub engaged within the opening of the sliding crown wheel 5.
  • the diameter of the opening of the wheel 5 is greater than that of the surface of the core 17, and the crown wheel can move laterally in accordance with the forces to which it is subjected.
  • the hub of the part 17 forms at its upper end a slight annular protrusion extending slightly higher than the level of the crown wheel 5 and resting against the lower face of the bridge 2. In this way the crown wheel is mounted with a clearance which can be adjusted and which permits it not only to turn but also to move laterally.
  • the bracket 13 also has an elongated opening 13 in which the pivot-shaped end 18 of the stem 4 engages.
  • the outer bracket 12 (FIG. 4), which is also cut from a metal plate, is fixed between the cock 3 and the pillar plate 1 by protrusions 19, 20 and 21.
  • One of the cutouts of this plate provides a clearance below the lower face of the cock 3 in which there is engaged a hook-shaped portion present on the elastic plate 7.
  • This portion 22 assures the hooking of the plate 7 which moreover has an open annular portion 23 located around the pillar 8 on a groove in said pillar.
  • the plate 7 is fastened below the frame element 3 along a plane parallel to the movement in such a manner that the lateral tongue 24 which it presents at approximately the middle of its length and which is slightly bent downward engages in one or the other of two notches 25 and 26 of open V shape which are cut in the stem 4.
  • the spring plate 7 also has a long arm 27 which extends in the direction of the pillar 9 and which rests against a portion of the click-stop 10.
  • the latter (FIG. 1) is also cut out from a metal plate, with a nose 28 which is engaged in the toothing of the ratchet wheel 11 and with a bearing element 29 which bears directly on the toothing of the wheel 11 so as to lock it.
  • the pillar plate has a first cutout 31 for the engagement of a portion of the winding pinion, which will be described below, and an opening 32 in which there is force-fitted the end of a pivot post 33 provided with a flat head which assures the pivoting of the setting wheel 6.
  • the latter is housed in the hollow 31 which, as stated previously, is provided at a place to permit the passage of the winding pinion.
  • the winding pinion 34 which has just been mentioned is integral with the stem 4. Its toothing may be out directly upon the manufacture of the stern so that it forms a single piece with the latter.
  • the pinion 34 is in the vicinity of the two grooves 25 and 26 on the inner side (FIG. 2). Beyond this pinion there extends a cylindrical surface which comes to a flat shoulder from where the pivot 18 protrudes.
  • the stem has a second cylin' drical surface which follows towards the outside, the two grooves 25 and 26, and then the elements of a clutch designated by 35 at an outer part of the stem.
  • the arrangement of the mechanism applies the use of a broken-stem system comprising the inner stem 4 housed within the movement upon the mounting of the latter and an outer stem (not shown) mounted on the case, bearing the crown and which engages with the inner stem upon the placing in the case.
  • This arrangement which is common in mono-shell cases and makes it possible to easily assure a good sealing of the stem, is well known and has already been used in numerous conventional movements.
  • the setting wheel 6 is mounted on the outer face of the pillar plate 1. It is in engagement with an intermediate wheel 36 (FIG. 1) which meshes directly with the minute wheel.
  • the bridge 3 has a lateral extension 37, the linear edge of which rests against the toothing of the crown wheel. This linear edge extends tangentially to the crown wheel (FIG. 1) and prevents it from moving in the direction of the axis of the stem.
  • the wheel 5 could also be held by an extension of the barrel bridge which is slightly bent so as to be located at the height of its toothing and which extends tangentially to the latter.
  • the ratchet wheel 11 will not turnin a direction opposite that of arrow 30.
  • the crown wheel 5 is turned in a clockwise direction by means of the stem, the portion of its toothing which engages the ratchet wheel 11 pushes against an immovable wheel; the central opening of the crown wheel moves on the core 17 by the action of the toothing of the pinion 34 pushing back that of the wheel 5 so as to cause a disengagement of the two.
  • the rotation of the stem has no effect on the ratchet wheel.
  • this mechanism is very simple to produce and can be easily assembled. In particular, there are no screws to put in place, which considerably simplifies the mounting.
  • the number of parts of the mechanism is very small. It comprises seven parts less than an ordinary mechanism, the parts which it has been possible to eliminate being the setting lever, the yoke, the setting-lever spring, the yoke spring, the setting-lever screw, the winding pinion and the clutch pinion.
  • the parts 13 and 12 which constitute the elements of the brackets could also be replaced by millings provided in the pillar plate and in the bridge, the latter being made in the form of thick parts and not in the form of fiat parts, as in the embodiment which has been described.
  • a final simplification is obtained by the fact that the inner bracket is held in place by the barrel bridge, while the outer bracket is held in place by another element of the frame, in the present case the cock 3.
  • This arrangement also facilitates assembly since, upon the putting in place of the barrel bridge, it is sufficient to be certain to place the inner bracket with the crown core and the crown wheel, but the stern proper, as well as the click spring, can be put in place upon the mounting of the cock.
  • a winding and setting mechanism for watch movements comprising:
  • a watch stem mounted for rotational and sliding movement, the latter between first and second axially displaced positions;
  • a ratchet wheel coupled to a drive spring and mounted for rotation to wind said spring and store energy therein;
  • a setting wheel mounted for rotation and coupled to the time indicating means of said watch movement for setting same, said setting wheel being mounted for rotation between the outer periphery of said watch movement and said drive pinion;
  • mounting means located between said drive pinion and the center of the watch movement, mounting said crown wheel for rotational and sliding movement, the latter between first and second positions, perpendicularly displaced with respect to the axis of said crown wheel;
  • said axially displaced positions of the watch stem being such that in said first axial position said drive pinion engages said crown wheel whereas in said second axial position said drive pinion engages said setting wheel.
  • a winding and setting mechanism further comprising: a fixed pivot element of circular shape, said crown wheel having a circular opening engaged with said fixed pivot element, said crown wheel opening having a larger diameter than said pivot element; and a bridge member extending tangentially to said crown wheel for maintaining said crown wheel in engagement with said pivot member.
  • a winding and setting mechanism according to claim 2, wherein said crown wheel is supported by a core housed below said bridge member, said core having a circular bearing surface on which the crown wheel pivots and a collar for supporting said crown wheel.
  • a winding and setting mechanism according to claim 3, further comprising first and second support brackets mounted on a base plate of said mechanism.
  • a winding and setting mechanism according to claim 4, wherein said first bracket has a hole to receive a pivot portion of the stem and a rectangular protrusion on which the crown core is fastened, said protrusion being engaged in an opening of the bridge member.
  • a winding and setting mechanism according to claim 4, wherein said second bracket has protrusions engaged in openings in the base plate in a further bridge member and a guiding cutout through which the stem passes.
  • a winding and setting mechanism further comprising: a click-stop member engaging said ratchet wheel; and a spring plate mounted on said movement and having a tongue for axially positioning said stem in said first and second positions and an arm engaging said click-stop member.
  • a winding and setting mechanism wherein said first bracket is fastened between the first bridge member and the base plate, the second bracket is fastened between the further bridge member and the base plate and the crown wheel is held in engagement with the drive pinion by a portion of the further bridge member.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Electromechanical Clocks (AREA)
  • Gears, Cams (AREA)
US00370672A 1972-06-30 1973-06-18 Winding and setting mechanism for watches Expired - Lifetime US3827235A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH989772A CH586417B5 (xx) 1972-06-30 1972-06-30

Publications (1)

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US3827235A true US3827235A (en) 1974-08-06

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ID=4356866

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Application Number Title Priority Date Filing Date
US00370672A Expired - Lifetime US3827235A (en) 1972-06-30 1973-06-18 Winding and setting mechanism for watches

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US (1) US3827235A (xx)
CH (2) CH989772A4 (xx)
DE (1) DE2329176C3 (xx)
FR (1) FR2191167B1 (xx)
IT (1) IT989476B (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4262564A (en) * 1978-07-07 1981-04-21 Dieter Kaltenbach Method of and a device for the elimination of play in feeding means of a cold-action circular saw
US4363554A (en) * 1981-01-16 1982-12-14 Eta S.A., Fabriques D'ebauches Setting mechanism for an analog display watch
US4415277A (en) * 1981-04-01 1983-11-15 Gebruder Junghans Gmbh Time adjusting mechanism for an electronic wristwatch with a manual adjusting stem
US4845693A (en) * 1987-10-02 1989-07-04 Shiojiri Kogyo Kabushiki Kaisha Apparatus for correcting a timepiece display
US20050157594A1 (en) * 2002-04-09 2005-07-21 Cyrille Clot Control mechanism for watch part
US20110110199A1 (en) * 2008-05-22 2011-05-12 Ct Time S.A. Timepiece mechanism and module comprising such a mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US523169A (en) * 1894-07-17 Norman t
US870109A (en) * 1907-06-06 1907-11-05 Gustav Bunzl Stem winding and setting watch.
US946906A (en) * 1909-06-10 1910-01-18 Philadelphia Watch Case Company Watch.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH281802A (fr) * 1950-05-10 1952-07-01 Schmitz Otto Mouvement de montre à remontage automatique à double effet par masse oscillante.
CH294399A (fr) * 1951-04-14 1953-11-15 Schmitz Otto Dispositif d'entraînement pour mécanisme de remontage d'une montre.
CH311289A (fr) * 1953-06-12 1955-11-30 Baumgartner Freres Sa Mécanisme de remontoir et de mise à l'heure pour mouvement d'horlogerie.
CH1705068A4 (xx) * 1968-11-15 1970-06-30

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US523169A (en) * 1894-07-17 Norman t
US870109A (en) * 1907-06-06 1907-11-05 Gustav Bunzl Stem winding and setting watch.
US946906A (en) * 1909-06-10 1910-01-18 Philadelphia Watch Case Company Watch.

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4262564A (en) * 1978-07-07 1981-04-21 Dieter Kaltenbach Method of and a device for the elimination of play in feeding means of a cold-action circular saw
US4363554A (en) * 1981-01-16 1982-12-14 Eta S.A., Fabriques D'ebauches Setting mechanism for an analog display watch
US4415277A (en) * 1981-04-01 1983-11-15 Gebruder Junghans Gmbh Time adjusting mechanism for an electronic wristwatch with a manual adjusting stem
US4845693A (en) * 1987-10-02 1989-07-04 Shiojiri Kogyo Kabushiki Kaisha Apparatus for correcting a timepiece display
US20050157594A1 (en) * 2002-04-09 2005-07-21 Cyrille Clot Control mechanism for watch part
US7083325B2 (en) * 2002-04-09 2006-08-01 Girard-Perregaux S.A. Control mechanism for watch part
US20110110199A1 (en) * 2008-05-22 2011-05-12 Ct Time S.A. Timepiece mechanism and module comprising such a mechanism
US8641269B2 (en) * 2008-05-22 2014-02-04 Ct Time S.A. Timepiece mechanism and module comprising such a mechanism

Also Published As

Publication number Publication date
DE2329176C3 (de) 1983-12-22
IT989476B (it) 1975-05-20
CH586417B5 (xx) 1977-03-31
CH989772A4 (xx) 1974-07-31
FR2191167B1 (xx) 1977-09-09
DE2329176A1 (de) 1974-01-24
DE2329176B2 (de) 1975-11-13
FR2191167A1 (xx) 1974-02-01

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