US3811267A - Watch movement automatic rewinding assembly with rotating mass - Google Patents

Watch movement automatic rewinding assembly with rotating mass Download PDF

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Publication number
US3811267A
US3811267A US00394527A US39452773A US3811267A US 3811267 A US3811267 A US 3811267A US 00394527 A US00394527 A US 00394527A US 39452773 A US39452773 A US 39452773A US 3811267 A US3811267 A US 3811267A
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US
United States
Prior art keywords
rewinding
mass
pawl
bolt
assembly
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
US00394527A
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English (en)
Inventor
R Zaugg
J Fluck
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.)
A Schild SA
Original Assignee
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
Priority claimed from CH1348772A external-priority patent/CH570642B5/xx
Priority claimed from CH873873A external-priority patent/CH583928B5/xx
Application filed by A Schild SA filed Critical A Schild SA
Application granted granted Critical
Publication of US3811267A publication Critical patent/US3811267A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

  • ABSTRACT An automatic rewinding device with a rotating mass for use in watch movement, wherein the pinion of the rewinding mass meshes with a-setting-wheel mounted on a lever capable of moving in such manner as to cause the setting-wheel to mesh with or free the first wheel-and-pinion of the rewinding gear-train depending on the direction of rotation of the mass, this first setting-wheel being subjected to the action of a pawl,
  • the present invention is directed to an automatic rewinding device with a rotating mass for use in a watch movement, the pinion of the rewinding massmeshing with a setting wheel mounted on a lever which may move so as to make the setting wheel engage or release th'efrrst wheel-and-pinion of-the windingtrain depending on the sense of rotation'of the mass, this first wheeland-pinion being subjected to the action of a pawl.
  • Devicesof this-kind are already known. They provide the advantages of simple construction with respect to devices equipped with reversers allowing utilization of all the motions of the rewinding mass.'The use of these simplifieddevices utilizing only one rewinding direction has drawn renewed interest since studies showed their efficiency was practically the same or even superior to that of the devices acting in both directions and As regards the devices with a single rewinding direction and comprising a lever-and pawl, these organs are actuated by springs; the assembly .of which presents a number of difficulties. First, the pawl acts on'a wheeland-pinion ofthe rewinding train which pivots between the base plate and the upper bridge of the device.
  • the pawl and the lever are generally provided with two pivots that must penetrate bearings which are rigidly mounted in these two frame elements. Now the pawl and lever winding springs must be emplaced prior to fastening the upper bridge and the bottom plate to eachother. These organs being subjected to the actions of theirsprings before their two pivots penetrate the respective bearings, that pivot temporarily supporting alone the spring-action runs the risk of being damaged.
  • a staff 2 made up of a turned part comprising a base 3 and a shaft 4.
  • 'Base 3 is held underneath bottom plate 1 by two screws 5 so that the shaft 4 is located at the center of plate 1 and in an opening of the latter.
  • Shaft 4 is meant to receive a bush6 solidly connected to a pinion 7 and force-fitted to the hub 8 of a rewinding mass 9.
  • Mass 9 and pinion 7 therefore constitute a single organ pivoting on shaft .4.
  • the rotational motion of pinion 7 therefore is transmitted by a setting-wheel 10 to a first wheel-and-pinion ll of the automatic rewinding train.
  • First wheel-andpinion ll actuates a second wheel-and-pinion 12, which in turn meshes with a third wheel-and-pinion 13, the pinion of which meshes with a ratchet 14. Except for pinion 7 and setting-wheel 10, all the wheel-andpinions pivot between the bottom plate 1 and an upper bridge which rests on elevated parts of bottom plate 1 by meansof screws 16 and guiding or positioning feet 17.
  • setting-wheel 10 As regards setting-wheel 10, it is fixed to one of the ends of a lever 19 by means of a fiat-headed journal 18. This lever in turn is provided in the vicinity of its other end with two pivots penetrating into bearings rigidly connected with bottom plate 1- and bridge 15.
  • lever-l9 is arc-shaped and its pivoting point isso located that the teeth of setting wheel it) constantly engage those of pinion 7. When Therefore assembly of those devices requires great care.
  • the purpose of 'the' present invention is to create a device of the kind mentionedwhich will be free from To that end, the device of the invention is characterized by comprising a single spring acting on the lever and on the pawl and an energizing element which may be movedv from a releasing position toone of engagement; in the latter position, the energizing element will keep the spring inthe energized state, the energizing element lending itself to being actuated from outside the movement'after the latter has been assembled.
  • Theattachedv drawing illustratively shows two .em bodiments of the device of the invention, wherein:
  • FIG. 1 is a top view of the first embodiment, the rewinding mass and the upper bridge having been removed;
  • FIG, 2 is asection along line slightly large'rscale
  • FIG. 3 is similar to FIG. 1, showing the upper bridge inplace; 1
  • FIG. 4' is a top viewof the second embodiment
  • This latter wheeland-pinion furthermore is subjected to the action of a pawl 20 which also rotates between bottom plate-l and bridge 15, and which stretches at the level of thewheel of the wheel-and-pinion 11.
  • the arm of lever 19 is doubly bent approximately at mid-length so that its free end carrying setting-wheel 10 is located at the levelof the inner'side of bottom plate 1, whereas its other end, which stretches beyond the pivots, is located between this bottom plate and the upper bridge at the same level as pawl 20.
  • a leaf or strip-spring 21 stretching in straight line from pawl 20 to the vicinity of the rear end of lever 19 is fastened to the pawl 20.
  • This strip therefore extends into a groove and to the edge of bottom plate 1, and an elevated part 22 holding a bolt 23 ex-- tends. between this groove and the edge of the bottom plate.
  • the bolt consists of a plate cut into an S-shape, of which one end enlarges so as to constitute a base 24 which may be secured in a shallow housing fashioned in the elevated part 22 of bottom plate 1, whereas the other end-may move because of elastic bending of the bolt.
  • One of the loops of the S of bolt 23 extends into a second shallow recess of part 22. For the case shown in FIG. 1 this loop projects beyond the contour of bottom plate 1.
  • the bolt is provided at its free end with,
  • a catch 25 projecting downwardly and on the other a triangular enlargementv 26.
  • the bolt end extends approximately in a radial direction, in direction of the axis of shaft 4 to a distance from the latter slightly greater than the radius of pinion 7.
  • Catch 25 hooksa first notch 27 fashioned in bottom plate 1 so as to retain the bolt in the free position.
  • Notch 27 is near a second notch 28, which blocks the catch 25 into a locking position.
  • Bolt 23 extends above lever 19 and strip-spring 21 so that the downward folded catch 29 will be at the same height as the strip-spring. 1
  • a conical point may therefore be put through this opening that will'act. on bolt :23 by releasing its catch 25 fromthe recess 27.
  • the spring relaxes, catch 25 penetrates hollow 28 and triangular enlargement 26 passes between pinion 7 and bar 9, thereby ensuring .the locking of the rewinding mass with respect'to the axial direction and freeing mass 9.
  • Catch 25 ensures keeping the bolt in its locking position. Simultaneously catch 29 will move and contact the central part of the strip-spring 21. The latter thereforeis made to bend.
  • the device shown in FIGS. 4 and 5 is designed for small caliber's, especially for such as will be housed in lady-watch cases. It comprises a lower bridge 41 covering-almost the entire rear side of the movement and an upper bridge 42 of which the contour is shaped as Wheel-andpinion 41 except for two hollows 43 and 44 which will be. described further below. Bridge 42 is provided with various hollows on its inner side which are meant to house the various movable elements inside the device ensuring the rewinding operations. These wheel-and-pinions comprise the three wheels 45, 46 and 47 of the reducing train of the rewinding device.
  • Wheel-and-pinion 45 is the energizing wheel; wheeland-pinion 46 effects reduction, its-wheel meshing with the pinionof wheel-and-pinion 45; wheel-and-pinion 47 drives a ratchet-wheel, of which the wheel meshes with the pinion of wheel-and-pinion 46.
  • Lever 48 and pawl 49 also are assembled to pivot between the frame components 41 and 42. They are provided with staffs of which the ends pivot in bearings which may be of metal or jewels and force-fitted into circular openings fashioned in the slim parts of bridges 41 and 42.
  • a bolt 50 is located in a radial and straight groove in the inner side of upper bridge 42, which slides towards the center and, as described further below, will fasten the rewinding mass (now shown in FIG. 4).
  • the staff 52 of the oscillating mass is solidly connected to a base 52a fastened to the inside of bridge 42 by a screw 53.
  • Base 52a is triangular in shape and provided with two positioning elements 52b penetrating the corresponding hollows of bridge 41. It is further provided with a rim 52c at the inner edge of the central opening 54 of bridge 41 and keeps the latter against bridge 42. Therefore, when assembling, emplacing base 52a and fastening it by means of screw 53 result in the assembly of the various components of the automatic rewinding device so that the latter thereafter assumes the function of an assembly unit.
  • the central opening 54 will be circular, but it is provided with a hollow 55 at one point of its periphery.
  • FIG. 4 shows that bolt 50 is housed in a groove in the thickness of bridge 52 and is guided between the bottom of this groove and the inner side of bridge 41 so as to move in an essentially radial direction between the flanks of that groove. It is provided with a bent part 50a in the vicinity of its inner end so it may retain the set comprising pinion 56 and mass 57 by engaging its bent part between these two components.
  • the end portion of elastic arm 50b of bolt 50 penetrates one or the other of hollows 67 and 59 fashioned in the thickness of bridge 42 and in this manner locks the bolt in one of the two possible positions;-a release position shown in the drawing and a penetration position wherein the end of arm 50b rests againstthe flank of hollow 59 and the bent part 50a locks mass 57 with respect to the axial sense.
  • the functions of the two components 48 and 49 are assumed by one strip-spring 61.
  • the latter acts on the pawl and on the lever. it is fastened by its left end to that part of lever 48 extending beyond is axis of rotation and'stretches towards-pawl 49.
  • the latter comprises three arms extending in the same plane perpendicular to its axis of rotation and may rotate in such manner as to be in two different positions: an activation position, shown in dashed lines in FIG. 4 and a release position, provided for assembly.
  • arm 62 of pawl 49 extends in hollow 43 of bridge 42. This arm is manually accessible and allows moving the pawl from one position to the other.
  • Arm 63 is the one filling the role of the pawl proper.
  • This arm 63 also is provided with a stop 64 pressing against the flank of a hollow fashioned in the thickness of bridge 42 and coinciding with the edge of a control opening entirely crossing the tive position when the pawl set is in the release position shown in solid lines.
  • pawl 49 rotates in the counter-clockwise sense shown in FIG. 4, in order to achieve an actuation position, the end of arm 65 will touch the end of strip spring 61, arid once in the activation position, so activates the pawl that stop 64 presses against the hollow of the bridge and the tip of arm 63 engages the teeth of wheel 45.
  • lever 48 is actuated into counter-clockwise rotation and theteeth of setting-wheel 60 engage those of wheel 45, whereas the end of the setting-wheel shaft presses against one of the flanks of hollow 55.
  • arm 63 constitutes an energizing'element which may be placedin an activating position wherein it maintains spring 61 energized.
  • Another advantage of the described device consists in the feasibility of relaxing the motor-spring, if so desired, without thereby being forced to disassemble the automatic rewinding mechanism, it sufficing if pawl 49 is brought back into the rewinding position by means of arm 62. g I n It will furthermore be observedthat bolt 50 fills a safety role in that when in the release position in which the end of its arm 50b is being kept in hollow 58, the.
  • An automatic rewinding assembly for watch movements, comprising: a rotatable rewinding mass mounted in said assembly; a rewinding gear train; a pawl'movably mounted for engagement with one gear I of said gear train; a lever mounted for pivotal movement in said assembly; a setting wheel mounted on said lever for movement therewith, said setting wheel engaging said rewinding mass; a spring mounted for engagement with said lever and said pawl; and a movable energizing member accessible from outside said assembly and having a release position and an energizing position, wherein in said energizing position, said energizing member urges said spring into engagement with said lever and pawl such that said pawl is urged into contact with said one gear of said gear train and said lever is pivoted to urge said setting wheel into engagement with said gear train.
  • Apparatus as defined in claim 6, further comprising an upper bridge covering the bolt and provided with an aperture allowing engaging the pinion of the rewinding mass inside the assembly, this upper bridge being provided with hole for access to the bolt in order to allow positioning it for locking.
  • Apparatus as defined in claim 1 wherein the spring is a leaf or blade fastened at one of its ends to the lever and said energizing member comprises an energizing arm solidly connected to the. pawl and passing '12.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Mechanical Operated Clutches (AREA)
  • Electromechanical Clocks (AREA)
US00394527A 1972-09-14 1973-09-05 Watch movement automatic rewinding assembly with rotating mass Expired - Lifetime US3811267A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1348772A CH570642B5 (cs) 1972-09-14 1972-09-14
CH873873A CH583928B5 (cs) 1973-06-15 1973-06-15

Publications (1)

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US3811267A true US3811267A (en) 1974-05-21

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US00394527A Expired - Lifetime US3811267A (en) 1972-09-14 1973-09-05 Watch movement automatic rewinding assembly with rotating mass

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US (1) US3811267A (cs)
FR (1) FR2200557B1 (cs)
GB (1) GB1435777A (cs)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH287929A (fr) * 1950-07-18 1952-12-31 Le Coultre & Cie Montre à remontage automatique.
US2789413A (en) * 1952-02-06 1957-04-23 Ch Tissot & Fils S A Automatic winding mechanism for watches

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH330898A (fr) * 1956-03-23 1958-06-30 Roamer Watch Co Sa Pièce d'horlogerie à remontage automatique par masse oscillante
CH342896A (fr) * 1957-11-26 1959-11-30 Longines Montres Comp D Dispositif de verrouillage axial d'une masse de remontage automatique de montre tournant sur un pivot fixe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH287929A (fr) * 1950-07-18 1952-12-31 Le Coultre & Cie Montre à remontage automatique.
US2789413A (en) * 1952-02-06 1957-04-23 Ch Tissot & Fils S A Automatic winding mechanism for watches

Also Published As

Publication number Publication date
DE2339474A1 (de) 1974-03-21
FR2200557B1 (cs) 1977-05-13
DE2339474B2 (de) 1976-09-23
FR2200557A1 (cs) 1974-04-19
GB1435777A (en) 1976-05-12

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