US3324646A - Pivoting device of a watch movement train element - Google Patents

Pivoting device of a watch movement train element Download PDF

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Publication number
US3324646A
US3324646A US471918A US47191865A US3324646A US 3324646 A US3324646 A US 3324646A US 471918 A US471918 A US 471918A US 47191865 A US47191865 A US 47191865A US 3324646 A US3324646 A US 3324646A
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US
United States
Prior art keywords
shaft
stem
bed
pivoting device
frame element
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
US471918A
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English (en)
Inventor
Schneider Jean-Claude
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.)
Tissot SA
Original Assignee
Fabrique dHorlogerie CHS Tissot et Fils 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
Application filed by Fabrique dHorlogerie CHS Tissot et Fils SA filed Critical Fabrique dHorlogerie CHS Tissot et Fils SA
Application granted granted Critical
Publication of US3324646A publication Critical patent/US3324646A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/02—Shock-damping bearings
    • 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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor

Definitions

  • the present invention relates to a pivoting device of a watch movement train element having at least two active elements carried on a shaft.
  • some of the train elements comprise only one active element such as for example the intermediate or setting wheel or the crown or transmission wheel, which generally are pivoted on studs provided on the bottom plate or on another element of the frame.
  • the train elements such as those of the gear train, which generally comprise two active elements, namely a wheel and a pinion present at both ends of their shaft pivots engaged in bearings mounted in the frame elements which hold the train element in place.
  • the prime object of the present invention is to realize a pivoting device of simple construction adapted to reduce to a large extent the bending moment to which the shaft ends are submitted.
  • the shaft comprises at least at one of its ends an axial bed forming a bearing engaged on a pivot stem protruding from a frame element of the movement.
  • FIGURES 1 and 2 are partial sectional views of a first and second embodiment respectively.
  • FIGURES 3 and 4 are partial sectional views of the end of the shaft of a third and fourth embodiment respectively.
  • reference numeral 1 designates a train element of the gear train of a watch movement comprising a wheel 2, a pinion 3, and a shaft 4.
  • This train element is made of one piece. It'is carried by a plate 5 presenting a truncated projecting part 7.
  • This part 7 presents a plane and annular upper face 8 and in the center of this face a bruise or dent 9 in the middle of which extends a bed 10 of cylindrical shape.
  • a straight cylindrical stem 11 is forced into this bed 10 and protrudes for the major part of its length beyond the dent 9. This stem solely ensures the pivoting of the train element 1.
  • the latter presents at the lower end of its shaft 4 an axial bed which comprises a cylindrical conical entry 12 and an upper cylindrical portion 13 adjusted to the outer dimension of the stem 11.
  • the entry 12 extends upwardly to the level of the upper face of the wheel 2 while the portion 13 which forms the bearing of the bearing block extends upwardly with respect to the shaft 4 to the pinion 3.
  • the pinion 3 is adapted to cooperate with a wheel 14 the toothing of which meshes with that of the pinion 3 at a level inferior to that of the base of the bed 12, 13.
  • the portion of the bed 13 which forms the bearing of the bearing block is limited in height on the one hand by the upper portion of the stem 11 and on the other hand by the upper edge of the entry 12.
  • This bearing extends in height between the wheels 14 and 2 so that the resultice-*- ant of the radial forces exerted onto the wheel 2 by an element (not represented) meshing with this wheel, and on the pinion 3 by the wheel 14 is transmitted to the stem 11 in form of a radial force.
  • the bending moments compensate each other to a large extent.
  • the stem 11 is sufiiciently stiif to withstand the radial force to which it is submitted without bending. It maintains the train element 1 in a perpendicular position with respect to the plate 5 and affords for its turning about its shaft.
  • the lower end of shaft 4 is constituted by an annular projection 15 extending upwardly beyond the level of wheel 2 around the entry of the bed 12 and resting on the abutment face 8.
  • the shaft 14 presents V a conical abutment member 16 which is engaged within the conical bed of similar shape 17 provided in a projection 18 of the frame element 19. The latter forms one of the bridges of the movement.
  • the bed 17 is adapted to guide and retain the abutment 16 .in the case of exaggerated shake of pivot 11 in its bearing.
  • FIGURE 3 illustrates another embodiment of the upper portion of shaft 4 and of the abutment 16.
  • the upper face of this abutment is plain and the bridge 19 presents a projection 20 at its lower plane face which extends 0pposite the abutment 16 to limit the axial shake of the train element.
  • FIGURE 4 Still another modification is illustrated in FIGURE 4 in which the abutment 16' is formed by a plane annular face enclosing a conical bed provided in the end of shaft 4.
  • the bridge 19 has a conical projection 20'.
  • FIGURE 2 illustrates the pivoting of a balance 21 comprising a felloe 22 mounted on a shaft 23 and a table roller (not shown) also mounted on shaft 23.
  • the balance is pivoted between the plate 5 and the bridge 19 and its shaft 23 traverses a profiled opening 24 made in a pallet bridge 25, the roller extending below this bridge.
  • the plate 5 presents in the axis of an opening 26 a cylindrical bed 27 into the center of which is forced a pivot stem 28.
  • the bridge 19 also is provided with a bed 29 similar to the bed 27 into which is forced a stem 30 coaxially with respect to stem 28.
  • a bed 29 similar to the bed 27 into which is forced a stem 30 coaxially with respect to stem 28.
  • cylindrical beds 31 axially penetrating the shaft and provided with a conical entry 32 similar to the conical entry 12.
  • the entries 32 extend to the corresponding end of the shaft and are limited by an annular face 33 which forms an axial abutment opposite the base of the beds 27 and 29, respectively.
  • the pivoting of the balance 21 is ensured by the two stems 28 and 30 fixed to the frame element by one of their ends, while the other is engaged in the cylindrical portionof the bed 31, which forms the bearing of the bearing block. Between these two ends each of the stems 28 and 30 has a tree portion of sufficient length to resiliently bend when the balance undergoes shock. The bending of the stems 28 and 30 is limited by the cylindrical lateral face of the shaft 23 abutting in the recesses 27 and 29.
  • the described pivoting device thus forms a dampening bearing of extremely simple construction.
  • the balance shaft may be made of plastic material and the stems 28 and 30 of steel, for example.
  • a pivoting device for a watch movement gear a shaft having an axis of rotation and a pair of toothed members fixedly connected to said shaft and projecting radially with respect to said shaft axis at positions spaced along said shaft axis, a frame element adjacent one end of said shaft, a pivot stem protruding from said frame element, an abutment face provided on said frame element around said stem, an annular shoulder formed at said one end of said shaft and abutting said abutment face, and an axial passage forming a bed in said one end of said shaft about said stern, said axial bed including a cylindrical bearing surface engaging an upper portion of said stein, said bed including an entry portion of greater radial dimensions than said cylindrical bearing surface and extending axially from the lower end of said cylindrical bearing surface to said annular shoulder in spaced relation to said stem, said stern and shaft contacting each other solely along a contacting portion extending from the upper end of said stem to the lower end of said cylindrical bearing surface, said contacting portion being limited
  • the combination further including, another frame element adjacent the other end of said shaft and having a stationary abutment element formed thereon, and a corresponding abutment element formed at the other end of said shaft cooperable with the stationary abutment element formed in said other frame element.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gears, Cams (AREA)
  • Electromechanical Clocks (AREA)
  • Rolls And Other Rotary Bodies (AREA)
US471918A 1964-08-07 1965-07-14 Pivoting device of a watch movement train element Expired - Lifetime US3324646A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH1035064A CH420993A (fr) 1964-08-07 1964-08-07 Dispositif de pivotement d'un mobile pour mouvement d'horlogerie
CH1276556X 1964-08-07
FR24113A FR1438983A (fr) 1964-08-07 1965-07-09 Dispositif de pivotement d'un mobile, notamment d'un mobile pour mouvement d'horlogerie

Publications (1)

Publication Number Publication Date
US3324646A true US3324646A (en) 1967-06-13

Family

ID=61627813

Family Applications (1)

Application Number Title Priority Date Filing Date
US471918A Expired - Lifetime US3324646A (en) 1964-08-07 1965-07-14 Pivoting device of a watch movement train element

Country Status (5)

Country Link
US (1) US3324646A (fr)
CH (2) CH420993A (fr)
DE (1) DE1276556B (fr)
FR (1) FR1438983A (fr)
GB (1) GB1105155A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626443A (en) * 1969-09-26 1971-12-07 Tissot Horlogerie Pivoting arrangement for moving parts of timepieces
US4102123A (en) * 1975-12-17 1978-07-25 Kabushiki Kaisha Daini Seikosha Bearing for a timepiece train
US4496246A (en) * 1980-10-21 1985-01-29 Kabushiki Kaisha Suwa Seikosha Timepiece construction

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5526867Y2 (fr) * 1975-05-23 1980-06-27

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR485286A (fr) * 1917-02-02 1917-12-27 Henri Rotschi Système de pivotement pour mobiles d'horlogerie, de compteurs et d'autres appareils de ce genre
FR986403A (fr) * 1946-03-01 1951-07-31 United States Time Corp Perfectionnements aux pièces d'horlogerie et autres instruments
FR1181801A (fr) * 1956-08-31 1959-06-18 Montage antichoc pour balancier de pendules
US3248867A (en) * 1963-11-07 1966-05-03 Sunbeam Corp Clock motor and movement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE117388C (fr) *
US1830032A (en) * 1924-01-08 1931-11-03 John H Kohler Staff for rotating apparatus
DE1105682B (de) * 1957-09-18 1961-04-27 Luise Kretschmer Gespritztes Kunststoffzapfenlager fuer Uhren und feinmechanische Geraete
CH343908A (fr) * 1958-12-15 1959-12-31 Erismann Gerard Axe de balancier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR485286A (fr) * 1917-02-02 1917-12-27 Henri Rotschi Système de pivotement pour mobiles d'horlogerie, de compteurs et d'autres appareils de ce genre
FR986403A (fr) * 1946-03-01 1951-07-31 United States Time Corp Perfectionnements aux pièces d'horlogerie et autres instruments
FR1181801A (fr) * 1956-08-31 1959-06-18 Montage antichoc pour balancier de pendules
US3248867A (en) * 1963-11-07 1966-05-03 Sunbeam Corp Clock motor and movement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626443A (en) * 1969-09-26 1971-12-07 Tissot Horlogerie Pivoting arrangement for moving parts of timepieces
US4102123A (en) * 1975-12-17 1978-07-25 Kabushiki Kaisha Daini Seikosha Bearing for a timepiece train
US4496246A (en) * 1980-10-21 1985-01-29 Kabushiki Kaisha Suwa Seikosha Timepiece construction

Also Published As

Publication number Publication date
CH420993A (fr) 1966-04-15
DE1276556B (de) 1968-08-29
FR1438983A (fr) 1966-05-13
GB1105155A (en) 1968-03-06
CH1035064A4 (fr) 1966-04-15

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