US3917965A - Transmission device for a horological mechanism - Google Patents

Transmission device for a horological mechanism Download PDF

Info

Publication number
US3917965A
US3917965A US149173A US14917371A US3917965A US 3917965 A US3917965 A US 3917965A US 149173 A US149173 A US 149173A US 14917371 A US14917371 A US 14917371A US 3917965 A US3917965 A US 3917965A
Authority
US
United States
Prior art keywords
teeth
poles
track
accordance
pitch
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
US149173A
Other languages
English (en)
Inventor
Gaston Raval
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 US3917965A publication Critical patent/US3917965A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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

Definitions

  • nozx 7/06 tiled member has a Comb formed into a plurality of 581 Field of Search 310/21, 22, 37, 25; 58/23, individual P0189 Pitch of Said Poles being 53/23 D 23 TF, 98, 23 v, n6 equal to the pitch of the teeth on the said track so that all the poles of the magnetized member are simulta- 5 References Cited neously in the same relative positions with respect to UNITED STATES PATENTS the teeth of the track.
  • the present invention concerns a device for convert ing vibratory movement into rotary movement in an horological mechanism, and comprising at least one oscillated magnetized member and an index wheel presenting at least one profiled track, also magnetized. on which there are periodically repeated teeth of uniform shape.
  • the object of the present invention is to provide a transmission device of the above mentioned type which ensures starting in a predetermined direction, and synchronous rotation without the assistance of a particular starting mechanism.
  • the device of the present invention is characterised in that the said magnetized member presents a comb containing a plurality of poles, the pitch of the poles being equal to the pitch of the teeth on the wheel track so that all the poles of the magnetized member are simultaneously in the same relative positions each with respect to one of the teeth on the track.
  • the pitch of the poles being equal to the pitch of the teeth on the wheel track so that all the poles of the magnetized member are simultaneously in the same relative positions each with respect to one of the teeth on the track.
  • FIG. 1 represents schematically the main parts of a horological mechanism
  • FIG. 2 represents in detail the form of the poles ofthe (magnetized) index member and the teeth of the index wheel
  • FIG. 3 is a view from above of a first embodiment of an index track
  • FIG. 4 is a view from above of another index track.
  • the horological movement schematically represented in FIG. 1 has a resonator in the form ofa tuning fork 1.
  • This tuning fork is coupled to a coil 2 connected to an appropriate driving circuit 3.
  • the members I to 3 constitute a known type of oscillator having a stable frequency in the audible range.
  • the coil 4 of a vibratory motor is connected in series with the coil 2 and is thus traversed by an alternating or pulsating current of the frequency of the tuning fork l.
  • the coil 4 acts on a permanent magnet S of the vibratory motor, this per manent magnet 5 being mounted on an arm 6 pivoted on an axle 7.
  • the other end of the arm 6 carries an index member 8 mounted so as to face an index wheel track 9.
  • the surface of the member 8 adjacent the index wheel track 9 presents a comb having poles 10.
  • the circumferential surface ofthe index wheel presents tracks described below. forming teeth H.
  • the relative shape and dimensions of these members are shown in FIG. 2.
  • the or each index track 9 and the index mem ber 8 are made of a material of high coercive force, the teeth 10 of the member 8 and the teeth ll of the index wheel track 9 being magnetized to form opposite poles such as are indicated in FlG. 2.
  • the teeth 11 are thus attracted by the poles 10 of the member 8, which produces a coupling effect, and indexing described below between the member 8 and the index wheel track 9.
  • FIG. 3 represents a relatively simple embodiment of the track 9 of an index wheel.
  • This track presents teeth 11 which each comprise a circumferential part lla and an inclined part llh.
  • the track is formed from two series of teeth axially and circumferentially offset so that the parts llb of these teeth are axially overlapped.
  • Each of these series of teeth is made from a stamping in which the parts of the teeth llb are cut out and bent into the form shown.
  • the circumferential pitch between two teeth ll of the same series is equal to the pitch between two poles 10 of the index member 8.
  • Five poles 10 are indicated in FlG. 3. It can be seen that all the poles 10 are arranged in the same position with respect to the successive teeth ll of one series on the index wheel. These poles 10 are shown in their neutral or rest positions.
  • the magnet 5, the arm 6 and the index member 8 are moved in a circulatory form of vibration around the axle 7.
  • the poles 10 thus oscillate in a direction perpendicular to the plane of the drawings FIGS. l and 2, and transversely to the circumferential direction of rotation of the index wheel in FIG. 3.
  • the amplitude of the index member 8 is chosen so that the axial displacement of the poles I0 substantially corresponds to the axial width of the track, i.e.. the distance between the roots ofthe two series of teeth I].
  • FIG. 4 represents a more complex index device which is more effective than that of FIG. 3.
  • Teeth 11 in the form shown in FIG. 3, are disposed in another way, ie with the circumferential parts 110 back to back and the inclined parts llb directed outwardly.
  • the index wheel presents three series of teeth or of auxiliary teeth.
  • the auxiliary teeth [2 are arranged half-way between the free ends of the parts 11b of two successive teeth 11.
  • the teeth 13 are disposed between the in' clined parts of each pair of teeth 11.
  • This embodiment has two index members 8 the poles of which are designated by 10' and 10'' respectively. Whilst the pairs of teeth ll of the two main tracks are not offset circumferentially. the poles l and are offset by half a pitch. When the poles of one index member, for example. the teeth 10 are opposite the teeth I] of the associated main track. the poles of the other index member, in this particular case numbered 10'. are in a position which is practically midway between two successive teeth ll.
  • the two index members are mounted on the same arm 6 of a vibratory motor and thus oscillate in synchronism and in phase in the axial direction ofthe index wheel.
  • FIG. 4 represents the rest position of the poles of the index members.
  • the poles l0 attract the teeth of the main left hand track.
  • the poles l0 and 10" are slightly displaced toward the left.
  • the poles 10' have a tendency to displace the index wheel downwardly with reference to the drawing.
  • the poles [0' approach the teeth 11 of the right hand track and thus exert a slight attraction downwardly.
  • the poles l0 have a tendency to displace the index wheel upwardly.
  • the poles 10' approach the teeth 12 of the right hand auxiliary track which are now slightly displaced upwardly.
  • the poles l0" attract the teeth l2 of the auxiliary track downwardly and thus prevent the index wheel from starting to turn the wrong way.
  • the poles 10' clear the outer ends of the teeth 11.
  • the poles l0" sufficiently approach the teeth ll of the main right hand track to draw them downwardly.
  • the poles l0 approach the teeth T2 of the auxiliary left hand track and exert some attraction downwardly.
  • the teeth ll of the main right hand track now remain under the poles l0" and are again displaced downwardly when the poles l0" oscillate towards the right and leave the ends of the teeth 11.
  • the index wheel is thus displaced downwardly in synchronism with the oscillation of the two index members.
  • the relatively strong poles of the auxiliary medial teeth 13 similarly prevent starting in the wrong direction.
  • the poles 10' When the poles 10' are displaced inwardly i.e. to the right. they first have a tendency to displace the index wheel upwardly. This could possibly leave the teeth with their circumferential parts lla. near the poles. which could produce a start in the wrong direction. This effect. though theoretically possible. is prevented by the relatively strong poles 13 which remain under the poles of the index members after starting. so that it is impossible for the poles 10 to leave the teeth ll via their circumferential parts Ila and this induce starting in the wrong direction.
  • all the teeth 11 and all the teeth 12 and 13 of the index wheel shown in FIG. 4 are magnetized with a polarity opposite to that of the poles l0 and 10''.
  • index member 8 more particularly made with duplicate pole having two toothing rows, is relatively heavy. It is advantageous to use the particular type of vibratory motor such as is represented in FIG. I. However, it is possible to mount the index member 8 directly on a tine of a resonator, such as a tuning fork.
  • a transmission device for converting vibratory movement into rotary movement in a horological mechanism comprising at least one oscillatable magnetized member and one index wheel presenting at least one toothed track, said wheel also being of magnetizable material and both said member and said wheel having periodically repeated toothlike poles of the same pitch thereon, said magnetized member having a comb formed into a plurality of individual poles, the pitch of said poles being equal to the pitch of the teeth on the said track so that all the poles of the magnetized member are simultaneously in the same relative posi tions with respect to the teeth of the track, said track being formed from at least two stampings on which said teeth extend from the base material and are bent laterally. and means for oscillating said magnetized member in a direction substantially parallel to the axis of said index wheel.
  • a device in accordance with claim 1, comprising two symmetrical tracks and two corresponding sets of poles on the oscillated member.
  • a device in accordance with claim 5, comprising at least one auxiliary track having teeth placed between the free ends of the inclined parts of the symmetrical track teeth.
  • each tooth is approximately opposite the neutral position of a pole. and wherein the circumferential parts and the said auxiliary track are opposite respective end positions of the normal oscillation of the poles.
  • a device in accordance with claim 7, comprising two auxiliary tracks each associated with a respective symmetrical track.
  • a third auxiliary central track being provided having one tooth between each pair of inclined parts of the adjacent teeth of the two tracks.
  • said or each of the said auxiliary tracks are formed from a disc stamping.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Linear Motors (AREA)
  • Electromechanical Clocks (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
US149173A 1970-06-24 1971-06-02 Transmission device for a horological mechanism Expired - Lifetime US3917965A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH953070A CH559932A (fr) 1970-06-24 1970-06-24 Dispositif pour convertir un mouvement vibratoire en un mouvement rotatif dans une piece d'horlogerie.

Publications (1)

Publication Number Publication Date
US3917965A true US3917965A (en) 1975-11-04

Family

ID=4352960

Family Applications (1)

Application Number Title Priority Date Filing Date
US149173A Expired - Lifetime US3917965A (en) 1970-06-24 1971-06-02 Transmission device for a horological mechanism

Country Status (4)

Country Link
US (1) US3917965A (enrdf_load_stackoverflow)
CH (2) CH559932A (enrdf_load_stackoverflow)
DE (1) DE2126669C3 (enrdf_load_stackoverflow)
GB (1) GB1347291A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130279302A1 (en) * 2010-12-15 2013-10-24 Asgalium Unitec Sa Magnetic resonator for a mechanical timepiece
US20150177697A1 (en) * 2013-12-23 2015-06-25 The Swatch Group Research And Development Ltd Angular speed regulating device for a wheel set in a timepiece movement including a magnetic escapement mechanism
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171991A (en) * 1962-01-08 1965-03-02 Baumer Herbert Electromagnetically actuated tuning fork drive adapted for clockwork
US3451280A (en) * 1965-07-29 1969-06-24 Centre Electron Horloger Device for transforming the movement for an electronic watch
US3474270A (en) * 1966-06-28 1969-10-21 Hatot Leon Ets Vibrators
US3518464A (en) * 1967-12-30 1970-06-30 Hattori Tokeiten Kk Electromagnetic driving mechanism
US3566167A (en) * 1968-11-02 1971-02-23 Omega Brandt & Freres Sa Louis Apparatus for conversion of reciprocating motion into rotating motion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171991A (en) * 1962-01-08 1965-03-02 Baumer Herbert Electromagnetically actuated tuning fork drive adapted for clockwork
US3451280A (en) * 1965-07-29 1969-06-24 Centre Electron Horloger Device for transforming the movement for an electronic watch
US3474270A (en) * 1966-06-28 1969-10-21 Hatot Leon Ets Vibrators
US3518464A (en) * 1967-12-30 1970-06-30 Hattori Tokeiten Kk Electromagnetic driving mechanism
US3566167A (en) * 1968-11-02 1971-02-23 Omega Brandt & Freres Sa Louis Apparatus for conversion of reciprocating motion into rotating motion

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20150177697A1 (en) * 2013-12-23 2015-06-25 The Swatch Group Research And Development Ltd Angular speed regulating device for a wheel set in a timepiece movement including a magnetic escapement mechanism
US20150177698A1 (en) * 2013-12-23 2015-06-25 The Swatch Group Research And Development Ltd Angular speed regulating device for a wheel set in a timepiece movement including a magnetic escapement mechanism
US9465366B2 (en) * 2013-12-23 2016-10-11 The Swatch Group Research And Development Ltd Angular speed regulating device for a wheel set in a timepiece movement including a magnetic escapement mechanism
US9483026B2 (en) * 2013-12-23 2016-11-01 The Swatch Group Research And Development Ltd. Angular speed regulating device for a wheel set in a timepiece movement including a magnetic escapement mechanism
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
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

Also Published As

Publication number Publication date
DE2126669A1 (de) 1971-12-30
DE2126669C3 (de) 1974-02-28
CH953070A4 (enrdf_load_stackoverflow) 1974-10-15
GB1347291A (en) 1974-02-27
CH559932A (fr) 1975-03-14
DE2126669B2 (de) 1973-08-09
CH559932B5 (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US3803433A (en) Permanent magnet rotor synchronous motor
US3790834A (en) Low speed synchronous motor
US4004168A (en) Electric rotating machine
US3818690A (en) Stepping motor for watch movement
GB1197660A (en) Magnetic Driving Mechanism.
US2864018A (en) Impulse motor
US3917965A (en) Transmission device for a horological mechanism
US3171991A (en) Electromagnetically actuated tuning fork drive adapted for clockwork
US3860842A (en) Electromagnetic rotative step by step motor
DE3879289D1 (de) Elektromechanisches zeitmessgeraet mit schrittmotor.
US3719839A (en) Device for magnetically regulating each stop position of an intermittently rotating output member
US4167848A (en) Driving device for an electric timepiece
US3435311A (en) Oscillatory electromechanical converter
US4115714A (en) Stepping motor
US3869627A (en) Synchronous motor
US3609958A (en) Magnetic device for transforming an oscillatory motion into a rotary motion
US2977750A (en) Indexing mechanism
US3351788A (en) Apparatus for mechanically converting the oscillating movement of an electro-mechanical oscillator
US3816779A (en) Bistable electromechanical transducer
US2469834A (en) Electric clock motor and system
US3566167A (en) Apparatus for conversion of reciprocating motion into rotating motion
US3354329A (en) Magnet arrangement for electric and electronic clocks
US3766729A (en) Quartz controlled chronometer
US3095690A (en) Contact and index system for an electric watch
US3485032A (en) Tuning fork assembly for use with rotary timepiece movement