US3670492A - Balance wheel assembly - Google Patents

Balance wheel assembly Download PDF

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Publication number
US3670492A
US3670492A US40654A US3670492DA US3670492A US 3670492 A US3670492 A US 3670492A US 40654 A US40654 A US 40654A US 3670492D A US3670492D A US 3670492DA US 3670492 A US3670492 A US 3670492A
Authority
US
United States
Prior art keywords
balance wheel
magnet
circular plate
apertures
magnet receiving
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
US40654A
Other languages
English (en)
Inventor
Hirotoki Takamune
Yoshifumi Mochizuki
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
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
Priority claimed from JP4937269U external-priority patent/JPS484937Y1/ja
Priority claimed from JP5012669U external-priority patent/JPS484938Y1/ja
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Application granted granted Critical
Publication of US3670492A publication Critical patent/US3670492A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G04C3/04—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 balance
    • G04C3/06—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 balance using electromagnetic coupling between electric power source and balance
    • G04C3/065—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 balance using electromagnetic coupling between electric power source and balance the balance controlling gear-train by means of static switches, e.g. transistor circuits
    • G04C3/066—Constructional details, e.g. disposition of coils
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • 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
    • G04C3/04—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 balance
    • G04C3/06—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 balance using electromagnetic coupling between electric power source and balance
    • G04C3/065—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 balance using electromagnetic coupling between electric power source and balance the balance controlling gear-train by means of static switches, e.g. transistor circuits

Definitions

  • the weight member for distributing the weight in the desired manner is conformed in part to the configuration of the balance wheel and secured directly thereto by adhesives or the like.
  • the magnetic pieces are secured to the weight member and extend through perforations in the balance wheel per se.
  • the perforations may be beveled or formed with a plurality of circumferential fingers to securely grip the magnetic member extending therethrough.
  • a main object of the invention is to provide a balance wheel assembly capable of highly simplifying the manufacture and attachment of the counter balance weight, as well as the drive magnets.
  • the balance wheel proper is prefabricated from an equal thickness plate stock by punching or press job, the openings for attachment of the drive and or sensing magnets being simultaneously formed during the progress of said press job.
  • the amount of the unbalance as measured upon completion of the balance wheel assembly should be in the order of several g. cm for keeping the stepping of the timepiece movement at a commercially reacceptable accurate value.
  • the practical amount of the unbalance will amount to the order of as high as several hundreds g. cm, being mainly caused by commonly used degree of workmanship and attachment of the counter weight.
  • FIG. 1 is a sectional plan view of a first embodiment of the invention, the section being taken on the section line A-A shown in FIG. 2.
  • FIG. 2 is a sectional view of the first embodiment taken on the section line BB shown in FIG. 1.
  • FIGS. 3 and 4 are similar views to FIGS. 3 and 4 illustrative of the second embodiment, the section being taken along the section lines C-C' and DD', respectively.
  • FIGS. 5 and 6 are similar views to FIGS. 1 and 2, illustrating, however, a third embodiment of the invention.
  • FIGS. 7 and 8 are similar views to FIGS. 1 and 2, illustrating, however, a fourth embodiment of the invention.
  • FIG. 9 is a similar view to FIG. 1, illustrating, however, a fifth embodiment of the invention.
  • FIG. 10 is a schematic plan view of a modification destined for attaching the drive magnet in position.
  • FIG. 11 is a sectional view taken along the section line I-I shown in FIG. 10.
  • FIG. 12 is a still further modified device for attaching a drive magnet in position, the section being taken along the section line K-K shown in FIG. 13.
  • FIG. 13 is a plan view of the device shown in FIG. 12.
  • 11 denotes a balance staff which is fitted at a certain mutual distance with two nonferrous balance wheels proper l2 and 12' which are rigidly and tightly attached in turn with magnetic circuit proper 16 and 16', respectively.
  • the tight attachment of balance wheels 12 with the magnetic circuit means 16, for instance, is carried out preferably by sticking or the like conventional measure.
  • the balance wheels 12 and 12' are formed with openings 13 and 13', respectively, in which drive magnets 14 and 14 are rigidly received. In diametral op position to these magnet masses l4 and 14', as a whole and relative to the stafi 11, there is formed a counter balance weight part 15 having a substantial plan dimension.
  • the strengthening parts l2; l2 and balance wheels l6; 16' have been formed weight reducing apertures 19, 19' by punching from two overlapped plate stocks at one stroke of a punching press.
  • the material surrounding the magnet-reception opening 13 is thus continuous with the material consisting the counter balance weight part 15, the thickness of this unitary part being appreciably larger than that of the magnetic circuit means 16.
  • This constructional feature is naturally applied to the remaining balance wheel 12 relative to the reception opening 13 and the magnetic circuit means 16'. In this way, the magnetic circuit means 16 and 16' have been considerably made stiffened.
  • the plate stocks for the balance wheels 12 or 12' and magnetic circuit means 16 or 16' have respective precisely unified thicknesses for obtaining the desired effects.
  • Conventional roller table 21 fitted with an impulse pin 20 is also provided on the lower end part of balance staff 1 l.
  • FIGS. 3 and 4 has substantially similar constructional features as before.
  • FIG. 3 is a section taken along the section line C-C' in FIG. 4.
  • FIG. 4 is a section along the section line D-D in FIG. 3.
  • the thickness counter balance weight part 22 or 22' has a larger size than that of the balance wheels 12 or 12.
  • Other parts including those denoted 12 and 12 are similar as before so that same reference numerals are employed.
  • the counter balance weight part 15 or 15' (FIGS. 1 and 2) has a broader covering area on account of its thickness being equal to the remainder of the balance wheel 12 or 12', respectively.
  • the diametral width of the counter balance weight part 22 or 22 is substantially smaller than that employed in the first embodiment. Therefore, the whole mass of these parts 22 are positioned substantially nearer to the outside periphery of the whole balance wheel assembly. Therefore, the relationship of the moment of inertia of the assembly to the whole weight thereof is more favorable than before.
  • the numeral 11 represents as before the balance staff.
  • Numerals l2 and 12' represent two separated balance wheels proper prefabricated from nonferrous plate stock of a precisely uniform thickness as before.
  • the magnet attaching openings 13 and 13' are formed as before for mounting the cylindrical disc-like sensing and or drive magnets 14 and 14 as before.
  • counter balance part 36 or 36' is formed by the provision of a pair of large perforations and 100', each part thus representing a large size and broadly covering, semimoon like shape.
  • the part shown at 32a has been cut away for reducing the whole weight of the assembly.
  • FIG. 5 is a section taken on the line E-E shown in FIG. 6 which is a vertical section taken along the section line FF in FIG. 5.
  • Magnetic circuit means 35 and 35' covers from outside each pair of said magnets 13 and 13, so as to establish a magnetic circuit including the four magnets and two magnetic plates. Others are similar as before and thus represented by respective same reference numerals as before.
  • the fourth embodiment shown in FIGS. 7-8 is a slight modification from the foregoing that there is provided only one magnet at 24 or 24 for each wheel proper.
  • the part of the material surrounding each of the magnet 27 and 27' has been cut away, for minimizing a part of the balance wheel. This measure is advantageous for further decreasing the weight of the whole assembly.
  • FIGS. 10-13 represent several the attaching modes of the magnet to its receiving opening.
  • an arcuate support plate 40 which acts as a magnetic circuit means is secured by means of rivets 42 or the like to the balance wheel 44.
  • the balance wheel 44 is provided with two magnet receiving apertures 46.
  • the walls of the apertures are beveled inwardly in the direction away from the support plate 40 and at their smallest diameter, provide a circular opening having a diameter identical to, or slightly smaller than, the diameter of the magnets 14.
  • the magnets 14 are secured to support plate 40 by any suitable means and extend through the apertures 46 wherein they are securely gripped by the beveled edges, as best seen in FIG. 11.
  • FIGS. 12 and 13 is similar to the embodiment of FIGS. 10 and 11 with the exception that the beveled edges of the magnet receiving apertures are replaced by a plurality of radially, inwardly directed fingers.
  • the support plate 40' is secured by means of rivets 42' or the like to the balance wheel 44'.
  • the balance wheel is provided with a magnet receiving aperture 46' and a plurality of inwardly directed fingers 47 are disposed about the aperture 46'.
  • the ends of the fingers 47 define a circular opening having a diameter identical or less than the diameter of the magnet 14.
  • the magnet 14 is secured to the support plate 40' by any suitable means and extends through the aperture into frictional engagement with the fingers 47.
  • each of said driving balance wheels comprising a circular plate having suitable weight reducing apertures therein intermediate a magnet receiving portion and a counterweight portion, additional plate means secured to one surface of said circular plate in superposed relation thereto, magnet receiving apertures formed in one of said plates, magnet means secured to the other of said plates and extending through said magnet receiving apertures.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Electromechanical Clocks (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
US40654A 1969-05-28 1970-05-26 Balance wheel assembly Expired - Lifetime US3670492A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4937269U JPS484937Y1 (fr) 1969-05-28 1969-05-28
JP5012669U JPS484938Y1 (fr) 1969-05-29 1969-05-29

Publications (1)

Publication Number Publication Date
US3670492A true US3670492A (en) 1972-06-20

Family

ID=26389757

Family Applications (1)

Application Number Title Priority Date Filing Date
US40654A Expired - Lifetime US3670492A (en) 1969-05-28 1970-05-26 Balance wheel assembly

Country Status (4)

Country Link
US (1) US3670492A (fr)
DE (1) DE2026959A1 (fr)
FR (1) FR2043742B1 (fr)
GB (1) GB1317457A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765166A (en) * 1971-12-29 1973-10-16 Suwa Seikosha Kk Balance construction for electronic timepieces
US3851461A (en) * 1971-02-10 1974-12-03 Timex Corp Balance wheel
USRE28794E (en) * 1972-12-22 1976-05-04 Timex Corporation Balance wheel
US20050036405A1 (en) * 2003-01-10 2005-02-17 Asulab S.A. Timepiece having a mechanical movement associated with an electronic regulator
US20050073913A1 (en) * 2003-10-01 2005-04-07 Asulab S.A. Timepiece having a mechanical movement associated with an electronic regulator
US20060126444A1 (en) * 2000-08-01 2006-06-15 Brenda Ellner Watch for dispensing scents, vapor and/or droplets, and storage device
US20070201317A1 (en) * 2004-10-26 2007-08-30 Tag Heuer Sa Regulating element for wristwatch and mechanical movement comprising one such regulating element
WO2011051497A1 (fr) 2009-11-02 2011-05-05 Lvmh Swiss Manufactures Sa Organe réglant pour montre bracelet, et pièce d'horlogerie comportant un tel organe réglant
US20190187624A1 (en) * 2017-12-20 2019-06-20 The Swatch Group Research And Development Ltd. Timepiece comprising a mechanical oscillator associated with a regulation system
US20190187625A1 (en) * 2017-12-20 2019-06-20 The Swatch Group Research And Development Ltd Timepiece comprising a mechanical oscillator associated with a regulation system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056253A (en) * 1960-06-10 1962-10-02 Ebauches Sa Electrically operated oscillatory system for timepieces
US3156857A (en) * 1958-12-17 1964-11-10 Herr Fritz Electrodynamic rate regulator arrangement for clocks
US3161012A (en) * 1962-08-22 1964-12-15 Ebauches Sa Driving balance-wheel for an electrical timepiece
US3186157A (en) * 1961-08-24 1965-06-01 United States Time Corp Balance wheel assembly for an electric timepiece

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942205A (en) * 1955-03-31 1960-06-21 Clarence H Mcshan Electromechanical transducer apparatus and systems embodying the same
FR1224395A (fr) * 1959-03-24 1960-06-23 Hatot Leon Ets Perfectionnements aux appareils magnétoélectriques applicables notamment aux montres électroniques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156857A (en) * 1958-12-17 1964-11-10 Herr Fritz Electrodynamic rate regulator arrangement for clocks
US3056253A (en) * 1960-06-10 1962-10-02 Ebauches Sa Electrically operated oscillatory system for timepieces
US3186157A (en) * 1961-08-24 1965-06-01 United States Time Corp Balance wheel assembly for an electric timepiece
US3161012A (en) * 1962-08-22 1964-12-15 Ebauches Sa Driving balance-wheel for an electrical timepiece

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851461A (en) * 1971-02-10 1974-12-03 Timex Corp Balance wheel
US3765166A (en) * 1971-12-29 1973-10-16 Suwa Seikosha Kk Balance construction for electronic timepieces
USRE28794E (en) * 1972-12-22 1976-05-04 Timex Corporation Balance wheel
US20060126444A1 (en) * 2000-08-01 2006-06-15 Brenda Ellner Watch for dispensing scents, vapor and/or droplets, and storage device
US20050036405A1 (en) * 2003-01-10 2005-02-17 Asulab S.A. Timepiece having a mechanical movement associated with an electronic regulator
US7306364B2 (en) 2003-10-01 2007-12-11 Asulab S.A. Timepiece having a mechanical movement associated with an electronic regulator
US7016265B2 (en) 2003-10-01 2006-03-21 Asulab S.A. Timepiece having a mechanical movement associated with an electronic regulator
US20050073913A1 (en) * 2003-10-01 2005-04-07 Asulab S.A. Timepiece having a mechanical movement associated with an electronic regulator
US20070201317A1 (en) * 2004-10-26 2007-08-30 Tag Heuer Sa Regulating element for wristwatch and mechanical movement comprising one such regulating element
US7396154B2 (en) * 2004-10-26 2008-07-08 Tag Heuer Sa Regulating element for wristwatch and mechanical movement comprising one such regulating element
WO2011051497A1 (fr) 2009-11-02 2011-05-05 Lvmh Swiss Manufactures Sa Organe réglant pour montre bracelet, et pièce d'horlogerie comportant un tel organe réglant
US8534910B2 (en) 2009-11-02 2013-09-17 Lvmh Swiss Manufactures Sa Regulating member for a wristwatch, and timepiece comprising such a regulating member
US20190187624A1 (en) * 2017-12-20 2019-06-20 The Swatch Group Research And Development Ltd. Timepiece comprising a mechanical oscillator associated with a regulation system
US20190187625A1 (en) * 2017-12-20 2019-06-20 The Swatch Group Research And Development Ltd Timepiece comprising a mechanical oscillator associated with a regulation system
US11846915B2 (en) * 2017-12-20 2023-12-19 The Swatch Group Research And Development Ltd Timepiece comprising a mechanical oscillator associated with a regulation system
US11868092B2 (en) * 2017-12-20 2024-01-09 The Swatch Group Research And Development Ltd Timepiece comprising a mechanical oscillator associated with a regulation system

Also Published As

Publication number Publication date
FR2043742B1 (fr) 1973-12-07
GB1317457A (en) 1973-05-16
FR2043742A1 (fr) 1971-02-19
DE2026959A1 (de) 1971-01-07

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