US3779002A - Watch movement with off-center center wheel and pinion - Google Patents

Watch movement with off-center center wheel and pinion Download PDF

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Publication number
US3779002A
US3779002A US00327428A US3779002DA US3779002A US 3779002 A US3779002 A US 3779002A US 00327428 A US00327428 A US 00327428A US 3779002D A US3779002D A US 3779002DA US 3779002 A US3779002 A US 3779002A
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United States
Prior art keywords
wheel
pinion
center
bridge
train
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Expired - Lifetime
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US00327428A
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English (en)
Inventor
R Zaugg
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A Schild SA
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A Schild SA
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Publication of US3779002A publication Critical patent/US3779002A/en
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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
    • 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
    • G04B33/00—Calibers
    • G04B33/10—Calibers with seconds hand arranged in the centre of the dial

Definitions

  • ABSTRACT [30] Foreign Application Priority Data Jan. 27, 1972 Switzerland 1213/72 Watch movement with an off-center center wheel 1 driving a third wheel with a friction-coupled auxiliary [52] US. Cl. 58/59 pinion driving the minute hand which permits setting [51] Int. Cl. G04b 33/00 of the hand while the third wheel is continuously [58] Field of Search 58/59 driven, a fourth wheel extending at the same level as said off-center center wheel, resulting in a thinner [56] References Cited watch movement structure.
  • these known calibers were arranged in such a way that the center wheel extended beneath the barrel, i.e., between the inner face of the plate and the barrel, at the same height as the centered minute wheel.
  • the third wheel extended above the barrel and the fourth wheel especially when the fourth wheel and pinion were disposed in the center of the movement and on above the third wheel, i.e., between that wheel andthe train-wheel bridge.
  • the object of the present invention is to suggest a novel arrangement of the caliber in a watch move.
  • the subject of the present invention is a watch movement with an off-center center wheel and pinion in which the center wheel extends. above the barrel, and the shaft of the third wheel and pinion bears an auxiliary pinion connected to the shaft by a friction coupling, this auxiliary pinion being situated at the level of the centered minute wheel and engaging it, characterized in that the elements of the train are mounted between a train-wheel and a plate, the train-wheel bridge exhibits a recess in its inner face, the third wheel and the fourth wheel pinion are lodged in that recess, and the center wheel and the fourth wheel are situated at the same level.
  • FIG- URE is a partial sectional view through the axes of the various wheels and pinions of the gear train, an embodiment of the watch movement according to the invention.
  • the movement shown in the drawing is in the position corresponding to the mounting, i.e., the plate 1 is at the bottom of the movement, and the train-wheel bridge 2 is at the top.
  • Plate 1 has at its center a raised and thickened portion 3 into which is driven a pipe 4 which serves as a pivot for a minute wheel and pinion 5 on which is placed the hour-wheel 6.
  • Wheel and pinion 5 and hour-wheel 6 each have coaxial pipes which pass through the center opening of the dial, the one intended to bear the minute-hand at its extremity and the other the hour-hand.
  • wheel and pinion 5 are made up of two parts rigidly fixed to one another and have a pinion toothing 7 which will be caused to engage the usual minute wheel (not shown) and a wheel toothing 8 which is driven in rotation by a train wheel, as will be seen later on.
  • the movement also includes a fourth wheel and pinion 9, the shaft 10 of which is guided by pipe 4, and the pinion 11 of which, as well as the wheel 12, form part of the gear train which transmits the force of the mainspring to the escapement.
  • This train is composed of the barrel 13 which pivots between plate 1 and trainwheel bridge 2 or a special barrel-bar a center wheel and pinion 14, the pinion of which engages the peripheral toothing of the barrel'drurn l3 a third wheel and pinion 15 which will, be described in more detail below, and the wheel 16 of which engages pinion ll of the fourth wheel and pinion; and finally, an escape wheel and pinion 17, the pinion 18' of which is driven by wheel 12 of the fourth wheel and pinion.
  • Wheels and pinions l4, l5 and 17 pivot at boths ends of their shafts in jewels fixed to bridge 2 and to plate 1.
  • the wheel 19 of the center wheel and pinion extends between barrel l3 and bridge 2 at the same height as wheel 12 of the fourth wheel and pinion, and wheel 16 of the third wheel and pinion extends above these two last-mentioned wheels in a recess 20 contrived in the inner face of train-wheel bridge 2.
  • This recess is also large enough tohold pinion ll of the fourth wheel and pinion, as'well as the upper end of shaft 14 of the center wheel and pinion.
  • ing has four projections, two of which rest against the edges of the two bosses 23, and the other two of which rest in the bottom of groove 25. This ring ensures a friction coupling of regulated torque between shaft 21 and pinion 22. It will be noted in this connection that the moment of friction necessary on the shaft of the third wheel and pinion can be much less than would be the case if the friction coupling were effected between the two parts of wheel and pinion 5, as is usually the case. This maximum torque is, as a matter of fact, limited to about 25 g/mm.
  • the arrangement described makes it possible to win a certain amount of height for the automatic winding mechanism.
  • the stud 26 on which the winding weight (not shown) pivots is integral with a frame element 27 which extends above train-wheel bridge 2.
  • a booking portion 28 can be contrived in the outer face of bridge 2 around recess 20.
  • stud 26 can be integral with u thinned portion 29 of frame element .27, while the normally thick portion 30 of that frame element extends over bridge 2 beside hooking portion 28.
  • This thick portion serves to fasten to frame element 27 another frame element 31 which, for example, ensures the pivoting of the wheels and pinions of the reverser actuated by the movements of the automaticwinding weight.
  • the two frame elements 27 and 31 are fixed by one or two screws 32 and as can be seen from the drawing, the head(s) 33 of this screw or these screws can be lodged in one or more openings 34 contrived in bridge 2. Obviously, this arrangement makes it possible to win height equal to the whole thickness of heads 33.
  • the pin 35 serves to fix and adjust frame element 27 on bridge 2. A screw (not shown) will likewise ensure the fastening of element 27 on bridge 2.
  • the wheels and pinions of the gear train can be placed in the following order, for example escapement, fourth wheel, center wheel, third wheel.
  • the centered minute wheel and pinion will be put in place after the movement has been turned over onto the outer face of the plate, with the minute wheel (not shown) and the hour wheel.
  • a watch movement comprising a train-wheel bridge, a plate, and, between said train-wheel bridge and said plate, a barrel, an off-center center wheel and pinion, a third wheel and pinion, and a fourth wheel and pinion, the arrangement comprising said fourth wheel and pinion being situated at the center of the movement, a centered minute wheel and pinion lodged on theouter face of the plate at the center of the movement coaxially to said fourth wheel and pinion, an auxiliary pinion in meshing engagement with the wheel toothing of said minute wheel and pinion, said auxiliary pinion being mounted on the shaft of said third wheel and pinion, a friction coupling between said auxiliary pinion and said shaft, said third wheel pinion meshing with said off-center center wheel, a recess in the inner. face of said train-wheel bridge, said third wheel and said fourth pinion being lodged in said recess, said offcenter center wheel extending between said barrel and said train-wheel bridge, and said fourth wheel extending at the same level as said off-center center wheel
  • said third wheel and pinion comprising a pinion integral with said shaft, said integral pinion extending between said third wheel and said auxiliary pinion, adjacent to said third wheel.
  • an automatic winding device comprising a winding weight rotatably mounted on a fixed stud, said stud being integral with a supporting plate having a thin portion and a thick portion, said stud being made integral with said thin portion, said trainwheel bridge having a hooking portion (28) around said recess, and said thick portion being fixedly connected to the outer face of said train-wheel bridge on the side of said hooking portion.
  • said supporting plate having a frame element of said automatic winding device secured thereto, said element being secured to said supporting plate by at least one screw, said screw having a head, and said head being lodged in an aperture (34) provided through said trainwheel bridge.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Mechanical Operated Clutches (AREA)
US00327428A 1972-01-27 1973-01-29 Watch movement with off-center center wheel and pinion Expired - Lifetime US3779002A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH121372A CH575619B5 (xx) 1972-01-27 1972-01-27

Publications (1)

Publication Number Publication Date
US3779002A true US3779002A (en) 1973-12-18

Family

ID=4205146

Family Applications (1)

Application Number Title Priority Date Filing Date
US00327428A Expired - Lifetime US3779002A (en) 1972-01-27 1973-01-29 Watch movement with off-center center wheel and pinion

Country Status (5)

Country Link
US (1) US3779002A (xx)
JP (1) JPS4885174A (xx)
CH (2) CH575619B5 (xx)
FR (1) FR2169292B1 (xx)
GB (1) GB1410871A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5290075U (xx) * 1975-12-27 1977-07-05
US5155712A (en) * 1992-04-20 1992-10-13 Timex Corporation Wheel and pinion assembly with friction drive/slip coupling for a timepiece
CN102354096A (zh) * 2011-09-18 2012-02-15 烟台北极星股份有限公司 一种机械时钟机芯的设计方法及其机芯

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51149663U (xx) * 1975-05-23 1976-11-30

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728187A (en) * 1951-08-23 1955-12-27 D Ebauches Eta S A Fab Watch with indirectly driven minute hand
US2781630A (en) * 1954-02-16 1957-02-19 Amida S A Dial train for roskopf type watches
US2903846A (en) * 1955-05-13 1959-09-15 Amida S A Watch movement with a central seconds hand
US2981055A (en) * 1955-05-27 1961-04-25 Montres Perret Et Berthoud Sa Self-winding time-piece
US3138916A (en) * 1961-03-02 1964-06-30 Derby S A Watch movement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH262327A (fr) * 1947-08-21 1949-06-30 Co Cortebert Watch Mouvement de montre.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728187A (en) * 1951-08-23 1955-12-27 D Ebauches Eta S A Fab Watch with indirectly driven minute hand
US2781630A (en) * 1954-02-16 1957-02-19 Amida S A Dial train for roskopf type watches
US2903846A (en) * 1955-05-13 1959-09-15 Amida S A Watch movement with a central seconds hand
US2981055A (en) * 1955-05-27 1961-04-25 Montres Perret Et Berthoud Sa Self-winding time-piece
US3138916A (en) * 1961-03-02 1964-06-30 Derby S A Watch movement

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5290075U (xx) * 1975-12-27 1977-07-05
JPS6039829Y2 (ja) * 1975-12-27 1985-11-29 セイコーエプソン株式会社 電池時計
US5155712A (en) * 1992-04-20 1992-10-13 Timex Corporation Wheel and pinion assembly with friction drive/slip coupling for a timepiece
CN102354096A (zh) * 2011-09-18 2012-02-15 烟台北极星股份有限公司 一种机械时钟机芯的设计方法及其机芯

Also Published As

Publication number Publication date
DE2303926B2 (de) 1975-10-23
CH575619B5 (xx) 1976-05-14
FR2169292B1 (xx) 1975-10-31
JPS4885174A (xx) 1973-11-12
GB1410871A (en) 1975-10-22
FR2169292A1 (xx) 1973-09-07
CH121372A4 (xx) 1975-12-15
DE2303926A1 (de) 1973-08-02

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