US3727396A - Oscillating motor - Google Patents

Oscillating motor Download PDF

Info

Publication number
US3727396A
US3727396A US00243392A US3727396DA US3727396A US 3727396 A US3727396 A US 3727396A US 00243392 A US00243392 A US 00243392A US 3727396D A US3727396D A US 3727396DA US 3727396 A US3727396 A US 3727396A
Authority
US
United States
Prior art keywords
rotor
housing
oscillating motor
ratchet wheel
accordance
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
US00243392A
Other languages
English (en)
Inventor
M Hetzel
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.)
Omega Louis Brandt and Frere SA
Original Assignee
Omega Louis Brandt and Frere 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 Omega Louis Brandt and Frere SA filed Critical Omega Louis Brandt and Frere SA
Application granted granted Critical
Publication of US3727396A publication Critical patent/US3727396A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/10—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means
    • G04C3/101—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details
    • 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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/02—Devices allowing the motion of a rotatable part in only one direction
    • G04B11/04—Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/10—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means

Definitions

  • An oscillating motor for a watch comprises a driven Apr. 27, 1971 Switzerland ..6l55/7l tuning fork or mechanical resonator a ratchet wheel.
  • the fork carries a hermetically sealed housing [52] L8. Cl.
  • ratchet wheel floats 58 Field of Search ..310/21, 22, 25, 37, on a liquid film in the housing and is driven y pawls 310 51; 58/23 D 23 TF, 23 V, 28 D 23 R; when the fork vibrates.
  • the rotation of the ratchet is 74/126, 133, 142 conveyed to the watch mechanism by the other half of the magnetic coupling, which is pivotally mounted outside the housing.
  • SHEET 3 [1F 3 BACKGROUND OF THE INVENTION
  • An oscillating motor mechanism including a tuning fork mounted on an arm, the oscillatory movement of which is converted into a rotary movement used in time measuring devices such as Wristwatches and wall clocks.
  • a ratchet wheel is mounted near the oscillating element for engagement by a pawl carried by the oscillating element so that it acts during movement of the oscillating member on the teeth of the ratchet wheel to thereby convert oscillating movement into rotary movement.
  • These known mechanisms despite attempted improvements thereof, have certain inherent disadvantages, such as; sensitivity to mechanical impact, temperature variation, and difficulty in maintaining the prescribed mechanical limits.
  • an oscillating motor includes a liquid-filled housing enclosing a pair of constraining blocks, and a rotor including a ratchet wheel located between the constraining blocks.
  • the diameter of the ratchet wheel is smaller than the distance between the constraining blocks and a pair of pawls is mounted within the housing to cooperate with the ratchet wheel at diametrically located points.
  • the housing is reciprocated and its reciprocating movement is transmitted by the pawls to the ratchet wheel and thereby converted into a unidirectional rotary move ment of the rotor.
  • a magnetic coupling means is associated with the rotor and couples the rotor movement to'a coupling member mounted externally of the housing or a wheel for driving a watch mechanism.
  • ing may be carried by an arm of an electrically actuated tuning fork.
  • FIG. 1 is a diagrammatic plan view of the housing portion of an oscillatory motor according to the present invention and illustrates the arrangement of the principal operative elements of the motor;
  • FIG. 2 is a schematic plan view of the magnetic disc portion of the rotor and illustrates the magnetic field of the said disc;
  • FIG. 3 is a section through the housing of FIG. I, and a part of the coupling member
  • FIG. 4 is a schematic depiction setting forth the arrangement of the housing when mounted in a wristwatch.
  • FIGS. 5 to are plan and sectional views of mounting embodiments incorporating a hydrodynamic bearing, which are utilizable in the present invention.
  • the oscillating motor shown in FIGS. 1-3 comprises a rotor including a ratchet wheel, which is provided on its circumference with fine ratchet teeth, not shown in the drawings.
  • the ratchet wheel is mounted so as to be freely rotatable between stop surfaces 2 and 3, of constraining blocks 17, 18.
  • the wheel is displaceable at right angles to its axis within certain limits and the surfaces 2 and 3, which are spaced a distance slightly exceeding the diameter of wheel 1, act as constraints upon reciprocating, side to side movement of the wheel.
  • the wheel 1 and blocks 17, 18 are enclosed within a housing 10 which is reciprocated, as indicated by arrow A, as will be hereinafter described.
  • pawls 4 and 5 mounted within housing 10 engage the teeth of the ratchet wheel 1, these acting in a manner also described hereinafter.
  • ratchet wheel 1 is firmly joined to a magnetic disc or ring 6, FIG. 3, which in turn is joined to a discshaped bearing block 20.
  • the ratchet wheel 1 and magnetic disc 6 are annular and formed with central holes 19, 19'. In both cases the hole facilitates the injection of adhesive used to join the parts 1, 6 and 20 together. In the case of the ratchet wheel 1 the hole helps to locate the teeth and in the case of the magnetic disc 6 the hole serves to reduce the weight.
  • the disc 6 is magnetized so that four poles are formed with the lines of force 6a emanating at right angles to the disc plane, as indicated by the vector notation at the respective N and S poles, and extending in the disc material between the adjacent 0pposite poles.
  • the disc 6 is coupled magnetically to a second magnet disc 7, FIG. 3, which with the first gear wheel 8 of the watch movement is coaxially mounted on an axle 11 fastened on a plate or bridge 31 of the watch.
  • the disc 7 and wheel 8 are pivotally mounted within an amagnetic bushing 32 and jewel bearing 33.
  • the constraining blocks 17 and 18 are secured to the bottom 25 of the housing 10.
  • the housing edge or rim is formed by two L -shaped parts 10 and 10".
  • the pawls 4 and 5 are carried by flat leaf springs 4a and 5a which are retained between the abutting surfaces of the rim parts 10, 10''.
  • a cover or lid 22, FIG. 3, is tightly connected with the rim providing a hermetic space, filled with a liquid 29, within which the parts 1, 4, 4a, 5, 5a, 6, 17, 18 and 20, and a second disc-shaped bearing block 21, connected to the bottom 25 of the'housing 10, are located.
  • the liquid 29 must be non-corrosive and non-poisonous, and have a low viscosity, and may, for example, comprise kerosene or a similar light oil.
  • the housing 10, as shown in FIG. 4, is fastened to an arm 15 of a turning fork 9 so that the direction of reciprocation of the housing 10, as indicated by arrow A, is substantially parallel to the springs 4a and 5a of stepping pawls 4 and 5.
  • the tuning fork is coupled to a driving coil 16 and the latter is connected to an amplifier or oscillator (not shown) to excite the turning fork into oscillation.
  • the resultant oscillatory movement executed by the arm 15 of the turning fork 9 reciprocates the housing 10 and the parts 4, 5, l7 and 18 to rotate the ratchet wheel 1 and thereby drive, through the magnetic coupling 6-7, the gear wheel 8.
  • This reciprocating movement rotates the ratchet wheel 1, retained by the pawls 4 and 5, one tooth at a time about its axis.
  • a hydrodynamic mounting for the rotor is provided in the hermetically sealed housing 10.
  • the liquid 29, filling the housing 10 forms a film 28 between the lower bearing surface 13 of thebearing block 20 secured to the magnetic disc 6 and the upper bearing surface 14 of the bearing block 21 mounted on the bottom housing wall 25, the oil or other liquid 29 circulating between the two surfaces 13 and 14. Due to the liquid film 28 located between the bearing surfaces 13 and 14, the rotation and radial rela tive displacement of the rotor in the housing occurs extremely smoothly.
  • the rotor consisting of the parts 1, 6 and 20, remains substantially in the axial position shown, even when the housing 10 is inverted, or when axial impacts act in a downward direction because the axial force of attraction between the two magnetic coupling members 6-7 is several times the weight of the rotor.
  • the cover or lid 22 of the housing 10 has a depression 27 formed therein, the inside surface of 12 of which acts as an axial stop for shock displacements.
  • the liquid located between the cover surface 12 and the ratchet wheel 1 damps the impacts andprevents friction and wear.
  • the hydrodynamic mounting has the advantage that the rotor is subject to a minimum of bearing resistance in any direction of movement parallel to the surfaces 13, 14.
  • the hydrodynamic mounting of the rotor produces a substantial improvement in the efficiency and shock-resistance of the drive mechanism and watch movement.
  • FIG. 5 discloses a modification according to which the facing surfaces 13a and 14a of bearing blocks a and 210 have rounded outer edge portions which enables easier penetration of the liquid between the surfaces 13a and 14a.
  • FIGS. 6 and 7 show a further embodiment wherein the lower bearing block is divided into two spaced segments 2lb.which enables improved liquid circulation between the surfaces 13 and 14b as well as between the segments.
  • the two segments may be further subdivided into four segments.
  • the modified embodiment shown in FIG. 8 comprises two bearing blocks 20c and 21 0 formed as planoconvex lenses the curved surfaces 13c and 140 ofwhich have an approximate radius of curvature of 2.5cm.
  • the opposed convex surfaces 130 and 140 accommodates greater liquid circulation.
  • the bearing block'2ld has in its bearing surface 14d two U-notches 30 which project inwards by half the As shown in FIG. 3, the bearing block 20 may be provided with a central bore, to promote the liquid supply and circulation between the bearing surfaces.
  • An oscillating motor for mounting on a reciprocating vibratory member and particularly for driving a timepiece movement, comprising:
  • a second magnetic coupling member external of said housing and magnetically coupled to said first magnetic coupling member, for transmitting the rotary motion thereof to a mechanical movement.
  • said first magnetic coupling member comprises a magnetized disc fixed to the ratchet wheel
  • said rotor also comprises a bearing block fixed therewith and carrying one of said abutting surfaces.
  • each of said abutting surfaces is flat with a rounded outer edge.
  • An oscillating motor is accordance with claim 8, wherein the radius of curvature of the convex face of 5 said block is approximately 2.50m.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromechanical Clocks (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Sliding-Contact Bearings (AREA)
US00243392A 1971-04-27 1972-04-12 Oscillating motor Expired - Lifetime US3727396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH615571A CH533867A (de) 1971-04-27 1971-04-27 Schwingungsmotor für Zeitmessgerät

Publications (1)

Publication Number Publication Date
US3727396A true US3727396A (en) 1973-04-17

Family

ID=4305151

Family Applications (1)

Application Number Title Priority Date Filing Date
US00243392A Expired - Lifetime US3727396A (en) 1971-04-27 1972-04-12 Oscillating motor

Country Status (4)

Country Link
US (1) US3727396A (xx)
CH (2) CH615571A4 (xx)
DE (1) DE2214915C3 (xx)
FR (1) FR2134387B1 (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4793199A (en) * 1985-12-19 1988-12-27 Messerschmitt-Bolkow-Blohm Gmbh Electromagnetic precision rotary drive
US5654597A (en) * 1995-09-08 1997-08-05 Kabushiki Kaisha Sankyo Seiki Seisakusho Magnetic disk drive motor
US20070225536A1 (en) * 2006-03-23 2007-09-27 Eugene Frederick Lutz Olefin conversion process and olefin recovery process
US20100253088A1 (en) * 2009-03-09 2010-10-07 Miw Associates, Llc Energy generator
US20130279302A1 (en) * 2010-12-15 2013-10-24 Asgalium Unitec Sa Magnetic resonator for a mechanical timepiece
US20160357155A1 (en) * 2013-12-23 2016-12-08 The Swatch Group Research And Development Ltd Device intended to control the angular speed of a train in a timepiece movement and including a magnetic escapement
US20160370766A1 (en) * 2013-12-23 2016-12-22 Eta Sa Manufacture Horlogere Suisse Mechanical clock movement with magnetic escapement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451280A (en) * 1965-07-29 1969-06-24 Centre Electron Horloger Device for transforming the movement for an electronic watch
US3631276A (en) * 1968-12-19 1971-12-28 Centre Electron Horloger Mechanical resonator for time-measuring apparatus
US3691754A (en) * 1969-11-13 1972-09-19 Omega Brandt & Freres Sa Louis Vibratory drive systems

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1107410A (fr) * 1954-09-09 1955-12-30 Dispositif de correction des écarts de marche des montres dans leurs différentes positions d'utilisation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451280A (en) * 1965-07-29 1969-06-24 Centre Electron Horloger Device for transforming the movement for an electronic watch
US3631276A (en) * 1968-12-19 1971-12-28 Centre Electron Horloger Mechanical resonator for time-measuring apparatus
US3691754A (en) * 1969-11-13 1972-09-19 Omega Brandt & Freres Sa Louis Vibratory drive systems

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4793199A (en) * 1985-12-19 1988-12-27 Messerschmitt-Bolkow-Blohm Gmbh Electromagnetic precision rotary drive
US5654597A (en) * 1995-09-08 1997-08-05 Kabushiki Kaisha Sankyo Seiki Seisakusho Magnetic disk drive motor
US20070225536A1 (en) * 2006-03-23 2007-09-27 Eugene Frederick Lutz Olefin conversion process and olefin recovery process
US20100253088A1 (en) * 2009-03-09 2010-10-07 Miw Associates, Llc Energy generator
US8476778B2 (en) 2009-03-09 2013-07-02 Miw Associates, Llc Energy generator
US20130279302A1 (en) * 2010-12-15 2013-10-24 Asgalium Unitec Sa Magnetic resonator for a mechanical timepiece
US8794823B2 (en) * 2010-12-15 2014-08-05 Asgalium Unitec Sa Magnetic resonator for a mechanical timepiece
US20160357155A1 (en) * 2013-12-23 2016-12-08 The Swatch Group Research And Development Ltd Device intended to control the angular speed of a train in a timepiece movement and including a magnetic escapement
US20160370766A1 (en) * 2013-12-23 2016-12-22 Eta Sa Manufacture Horlogere Suisse Mechanical clock movement with magnetic escapement
US9715217B2 (en) * 2013-12-23 2017-07-25 The Swatch Group Research And Development Ltd Device intended to control the angular speed of a train in a timepiece movement and including a magnetic escapement
US9804570B2 (en) * 2013-12-23 2017-10-31 Eta Sa Manufacture Horlogere Suisse Mechanical clock movement with magnetic escapement

Also Published As

Publication number Publication date
FR2134387B1 (xx) 1976-10-29
DE2214915B2 (de) 1973-07-05
DE2214915C3 (de) 1974-01-31
DE2214915A1 (de) 1972-11-09
CH533867A (de) 1972-08-31
CH615571A4 (xx) 1972-08-31
FR2134387A1 (xx) 1972-12-08

Similar Documents

Publication Publication Date Title
JP4607966B2 (ja) 腕時計用の調速機構、及び、当該調速機構を有する機械式ムーブメント
US5023853A (en) Electric apparatus with silent alarm
CN100480901C (zh) 具有与电子调速器相联的机械机芯的时计
CN1603981A (zh) 具有与电子调速器相联的机械机芯的时计
US3727396A (en) Oscillating motor
US3860844A (en) Low friction miniature gear drive for transmitting small forces
US3792578A (en) Low friction miniature gear drive for transmitting small forces, and method of making same
US2960817A (en) Electrical timepiece
US2968756A (en) Motor
US3469389A (en) Electromechanical vibrator assembly for a timepiece
US3635013A (en) Biassed oscillator arrangement
US3618311A (en) Synchronized horological system
US6826124B2 (en) Timepiece with power reserve indication
US3487629A (en) Drive balance wheel arrangement for timepiece
US3070951A (en) Frequency-adjustable tuning fork type vibrator for an electrically energized timepiece
US3744326A (en) Motion transformer
US3184981A (en) Electronically-controlled timepiece and motion transformer therefor
US3641761A (en) Watch transducer
US3708974A (en) Pallet attracting construction
US3744327A (en) Motion transformer
US3779093A (en) Motion transformer
US2929196A (en) Electric timepiece
US3670493A (en) Indexing mechanism for electric/electronic timepieces
US3312053A (en) Step by step drvie mechanism for timepiece
GB1324340A (en) Vibratory drive systems