US3855779A - Pivoting device for the winding weight of an automatic watch - Google Patents

Pivoting device for the winding weight of an automatic watch Download PDF

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Publication number
US3855779A
US3855779A US00436921A US43692174A US3855779A US 3855779 A US3855779 A US 3855779A US 00436921 A US00436921 A US 00436921A US 43692174 A US43692174 A US 43692174A US 3855779 A US3855779 A US 3855779A
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United States
Prior art keywords
boss
weight
winding
banking
fixed
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Expired - Lifetime
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US00436921A
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English (en)
Inventor
U Giger
F Perrot
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.)
Ebauchesfabrik ETA AG
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Ebauchesfabrik ETA AG
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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
    • G04B5/18—Supports, suspensions or guide arrangements, for oscillating weights
    • G04B5/19—Suspension of the oscillating weight at its centre of rotation

Definitions

  • ABSTRACT A pivotingdevice for a wi nding weight of an auto-' matic watch movement comprising a frame'element support withla circular opening, a one piece boss rotatively fit in the Circular opening and-'attached to the winding weight,the boss containingan eccentric stud v for drivinga winding train.
  • the support 3 is'a frame element which canbefixed to one of the bars of the movement by conventional
  • the present invention relates to a pivoting device for i the winding weightof an automatic watch, one of the parts of which has acylindrical sliding surface andtwo opposed, annular, axial banking surfaces, and the other part of which consists of a flat ring disposed around the sliding surface and between the banking surfaces.
  • a device of this type is described in Swiss Pat.;No. 485,257. It was designedwith the object of providing j a thin device capable of being set in place on the watch mO ⁇ ement and removed as a unit.
  • this known device
  • the winding weight has a center aperture into which a ring-shaped winding weight pinion is fitted.rThis ring carries an inner part :which constitutes a second flat ring guided axially between two fixed discs and around a cylindrical interposed part. Thus the pinion is'situated y above the oscillating-weight support to which the discs and the interposed part are fixed.
  • the oscillatingweight support held between the upper face of the rim 4 and the lower face of the thick portion 2a of the typedefined above, is characterized. by a one-piece boss having the sliding surface and one of the axial annular axial banking surface, the boss constituting the first member of the automatic winding train, and the flat ring constitutingpart of an oscillating-weight support intended to be fixed to the frame of the movement.
  • Pivoting devic'esfor winding weights are also known weight 2, is then fixed to the frame of the movement, e'.g. on the train bar.
  • the stud 8 then projects between the weight support and the movement so as to ensure j 1 the driving of the winding train in a manner-known per 3 se.
  • the lower annular'surface of the thickened portion l of the winding weight which is a plane surface, is on a level with the top of the shoulder 6 and forms the upper axial banking surface cooperating with the weight support. Opening out of this surface are holes 10 which are distributed around the boss and make it possible to lubricat e the slidingjsurfaces of the bearing.
  • FIG. 2 shows a second embodimentof the pivoting device according to the invention. This embodiment differs from the first one chiefly in that the boss 11 is j connected to the winding weight 12 by a screw 20.
  • the boss 11 is j connected to the winding weight 12 by a screw 20.
  • bossll' has a threaded center aperture 21 in which the screw is engaged.
  • the flattened prolongation 17 serves which include ball bearings.
  • a boss fixed to the winding weight has a peripheral collar which, together with an upper ring likewise kept .in place by theboss, constitutes the inner ball-race of l the bearing. This design is completelydifferent from the one which is the subject of the present invention.
  • FIGS. land 2 of the drawing are axial sectional
  • the pivoting device shown in FIG. 1 ensures the pivoting of a winding weight in an'automaticwatch movement. It is composed of three parts a boss 1, a banking 2a, and an oscillating-weight support 3.
  • the banking 2a forms part of the winding weight 2.
  • the boss 1 is a gen- T er-ally cylindrical-shaped P Provided with a rim 4 projecting laterally from its lower portion.
  • the upper annular face of the rim 4 forms a first axial banking surface of the device described. Extending from the inner edge of this annular surface is'a cylindrical bearing surface 5 which is limited at its upper end by an annular shoulder 6.
  • the boss 1 further has an upper prolongation 7 which extends axially from the inside edge of the shoulder 6.
  • theboss can be .ever, thisadvantage entails .to center the boss in the center aperture 19 of the weight 12.
  • the shoulder 16, the cylindrical bearing surface 15, the projecting rim 14, and the winding-weight support 13 have the same functions as the corresponding parts in the first embodiment.
  • the holes 10 likewise serve for the lubrication of the pivoting and banking surfaces.
  • the means provided here for driving the winding train consists of a toothing 18 which is contrived in the outer edge of the projecting portion 14.
  • the one shown in FIG. 2 has the advantage that the winding weight can be separated from the weight support. l-lowcated manufacture.
  • the weight 12 of FIG. 2 could also be driven or clinched on the boss 11 as shown in FIG. L
  • the prolongations 7 and 17 are made of a different material from the weights 2 or 12.
  • the prolongations 7 or 17 would then consist of a detachable flat ring.
  • a pivoting device for a winding weight of an auto matic watch movement comprising a winding weight support having a flat ring shaped portion with a circular opening therein, said support being intended to be fixed to the frame of said movement, a one-piece boss a somewhat more compli-' including a cylindrical sliding surface, a first banking surface and means for driving a winding train of said movement, and furtherta member, integral with said winding weight, rigidly secured to said boss and including a second banking surface, said second banking surface extending opposite said first banking surface, said ring shaped portion extending between said banking surfaces and said circular opening engaging said cylindrical sliding surface.
  • a device according to claim 4 wherein the boss'is permanently fixed to .the weight by being driven in or i clinched or riveted r 6.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Sliding-Contact Bearings (AREA)
US00436921A 1973-02-22 1974-01-28 Pivoting device for the winding weight of an automatic watch Expired - Lifetime US3855779A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH253273A CH573135B5 (en)) 1973-02-22 1973-02-22

Publications (1)

Publication Number Publication Date
US3855779A true US3855779A (en) 1974-12-24

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Family Applications (1)

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US00436921A Expired - Lifetime US3855779A (en) 1973-02-22 1974-01-28 Pivoting device for the winding weight of an automatic watch

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US (1) US3855779A (en))
CH (2) CH253273A4 (en))
FR (1) FR2219454B1 (en))
GB (1) GB1458406A (en))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999371A (en) * 1975-01-06 1976-12-28 A. Schild S.A. Automatic winding device for a watch movement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2670591A (en) * 1949-10-21 1954-03-02 Eta A G Bearing for oscillating weight in watches with automatic winding mechanism
US2686397A (en) * 1948-03-01 1954-08-17 Roulements A Billes Miniatures Ball bearing for winding rockers in self-winding watch and clock movements
US2749779A (en) * 1951-12-15 1956-06-12 Bulova Watch Co Inc Reversible input unidirectional output transmission gearing
US2948573A (en) * 1954-12-22 1960-08-09 Eta A G Bearing means for the rotatable winding weight of a selfwinding watch
US3517500A (en) * 1968-01-30 1970-06-30 Ebauchesfabrik Eta Ag Frictional bearing arrangement for the winding weight in a self-winding watch
US3707841A (en) * 1970-12-28 1973-01-02 Suwa Seikosha Kk Eccentric cam structure for an automatically wound watch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686397A (en) * 1948-03-01 1954-08-17 Roulements A Billes Miniatures Ball bearing for winding rockers in self-winding watch and clock movements
US2670591A (en) * 1949-10-21 1954-03-02 Eta A G Bearing for oscillating weight in watches with automatic winding mechanism
US2749779A (en) * 1951-12-15 1956-06-12 Bulova Watch Co Inc Reversible input unidirectional output transmission gearing
US2948573A (en) * 1954-12-22 1960-08-09 Eta A G Bearing means for the rotatable winding weight of a selfwinding watch
US3517500A (en) * 1968-01-30 1970-06-30 Ebauchesfabrik Eta Ag Frictional bearing arrangement for the winding weight in a self-winding watch
US3707841A (en) * 1970-12-28 1973-01-02 Suwa Seikosha Kk Eccentric cam structure for an automatically wound watch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999371A (en) * 1975-01-06 1976-12-28 A. Schild S.A. Automatic winding device for a watch movement

Also Published As

Publication number Publication date
FR2219454A1 (en)) 1974-09-20
CH253273A4 (en)) 1975-07-15
FR2219454B1 (en)) 1978-03-10
DE2404992B2 (de) 1976-10-21
DE2404992A1 (de) 1974-09-05
CH573135B5 (en)) 1976-02-27
GB1458406A (en) 1976-12-15

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