US2949727A - Electric timepiece - Google Patents

Electric timepiece Download PDF

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Publication number
US2949727A
US2949727A US565452A US56545256A US2949727A US 2949727 A US2949727 A US 2949727A US 565452 A US565452 A US 565452A US 56545256 A US56545256 A US 56545256A US 2949727 A US2949727 A US 2949727A
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US
United States
Prior art keywords
timepiece
tuning fork
tine
base plate
ratchet wheel
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
US565452A
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English (en)
Inventor
Hetzel Max
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.)
Bulova Watch Co Inc
Original Assignee
Bulova Watch Co Inc
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 Bulova Watch Co Inc filed Critical Bulova Watch Co Inc
Application granted granted Critical
Publication of US2949727A publication Critical patent/US2949727A/en
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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
    • G04C3/08—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
    • G04C3/102—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 of the mechanical oscillator or of the coil
    • 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
    • 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
    • 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
    • G04C3/107—Controlling frequency or amplitude of the oscillating system
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10G—REPRESENTATION OF MUSIC; RECORDING MUSIC IN NOTATION FORM; ACCESSORIES FOR MUSIC OR MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR, e.g. SUPPORTS
    • G10G7/00—Other auxiliary devices or accessories, e.g. conductors' batons or separate holders for resin or strings
    • G10G7/02—Tuning forks or like devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/24—Constructional features of resonators of material which is not piezoelectric, electrostrictive, or magnetostrictive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1526—Oscillation or reciprocation to intermittent unidirectional motion
    • Y10T74/1553—Lever actuator
    • Y10T74/1555—Rotary driven element

Definitions

  • the present invention relates to electric timepieces of the type ⁇ disclosed in copending application Serial No. 436,949, filed June 15, 1954, now abandoned, and entitled Electronic Device for the Operation of a Timepiece Movement of which the present lapplica-tion is a continuation-impart.
  • One of the objects of the present invention is to provide an electrical timepiece capable of being connected to the storage battery of an automobile to be operated thereby or capable of carrying its own source of electrical energy.
  • Another object of the present invention is to provide an electrical timepiece with a means for converting the oscillations of a tuning fork or the like into rotary movements of the hands of the timepiece.
  • An additional object of the present invention is to provide an electrical timepiece with a means for adjusting the natural frequency of one of the tines of a tuning fork of the timepiece so as to regulate the latter.
  • the present invention mainly consists of an electrical timepiece which includes a 4base plate which carries a tuning fork having a pair of tines spaced from the base plate.
  • a pawl or the like is connected to one of the tines and cooperates with a ratchet wheel which in turn cooperates with a gear train for converting the oscillations of the tuning fork into a rotary movement capable of being used for moving the hands of a timepiece.
  • Fig.v 1 is a plan View of the interior of a timepiece according to the present invention when seen from the rear of the timepiece, Fig. il showing diagrammatically ho-w the electrical leads may be connected to a storage battery or the like when the timepiece forms a clock of an automobile, for example;
  • Fig. 2 is a sectional elevational View taken along line A-B-C-D-E-F of Fig. 1 in the direction of the arrows;
  • Fig. 3 is a side elevational view of the structure of Fig. 1 as seen from the left side of the latter;
  • Fig. 4 is a fragmentary plan View similar to Fig. 1
  • Fig. 5 is a fragmentary perspective view of part of a pawl of the present invention as seen in the direction of arrow G of Fig. 1;
  • Fig. 6 is a perspective view illustrating the connection of a pawl to the tine of a tuning fork, the structure of Fig. 6 ybeing shown in the direction of arrow H of Fig. l;
  • Fig. 7 is a wiring ⁇ diagram of the electrical circuit of the structure shown in the drawings.
  • the timepiece includes a base plate 1 which is made of a' A tuning.
  • fork 2 is fixed to a member 5 as by soldering or welding or the like, and this member 5 is in turn fixed to the base plate 1 by the pair of screws 5a.
  • the member 5 is connected to the tuning fork 2 only at the part thereof which interconnects thev tines 3 and 4, so that the latter are maintained in spaced relation to the ⁇ base plate 1 and are free t0 oscillate.
  • a permanent magnet 6 in the form of a hollow cylinder which is openA at one end and which has an end ywall 6b closing the cylinder 6c, this end wall 6b carrying a magnetic bar 6a which is of a very strong magnetic material suchv as Alnico, for example.
  • the other tine 4 of the tuning fork 2 carries a balance Weight 7 at its free end, this balance weight 7 simply lbeing in the form of a cylindrical Ablock fixed in themanner shown in Fig. 1 to the free end of the tine 4.
  • the tines 3 and 4 .and the masses of the permanent magnet 6 and balance weight 7 are so chosen that the tine 3 and permanent magnet 6 on the one hand and the tine 4 and balance Weight 7 on the other hand have approximately the same natural frequency so that the tuning fork will not require an undesirably large amount of damping.
  • the balance weight 7 is provided with a threaded bore 7a in which a screw member S shorter than the length of lthe threaded bore is threadedly located so that this screw member may lbe shifted toward or away from the tine 4' along the line forming an extension of the latter, and by this shifting of the screw 8 it is possible to vary the natural frequency of the tine 4. inasmuch as the natural frequency of ⁇ the entire tuning fork is the average of the natural frequencies of the two tines, it is possible to change the natural frequency of the entire tuning fork by shifting the screw 8. In this way it is possible to regulate the time which is kept by the timepiece. Thus, if there are relatively small variations between the natural l frequencies of the tines and the weight and permanent magnet respectively carried thereby, such small variations able the time piece to keep accurate time within this range of plus or minus three minutes per month, for example.
  • a tubular carrier 10 which is fixed to a support 13, the latter in turn being fixed to the base plate 1 by if the screw members 14, as is evident from Figsjl and 3. 5:
  • This tubular member v10 freely surrounds the core 6a?? without contacting the latter, and the tubular member 10' carries a pair of coils 11 and 12, the coil 12 having ap- -proxmately tive times as many convolutions as the coil ⁇ 'l' Patented Aug. 23, 1960A tion.
  • the core ⁇ 6a has sufficient clearance within the tube 10 to avoid contacting the latter during the oscillations of the tuning fork.
  • the coils form with the permanent magnet 6 a transducer which together with the tuningV fork 2 forms a tuning' fork ⁇ oscillator of the same general type as that disclosed in the above mentioned cependingY application.
  • the support 13 At the left face of the support 13, as viewed in Fig. 1, and as is shown in Fig. 3, there is iixed a resilient stnap 33 which serves to mount ou the support 13 a condenser 34, a resistance 35, a transistor 19, and a capacitance 40. Furthermore, the support 13 carries a pair of insulated electrical terminals 15 and 16 which are electrically connected to the lines 22 and 23 which in turn are connected to a source of electrical energy. According to the embodiment of the invention shown in Fig. 1, the source of energy is the storage battery 17 of an automobile. In general the voltage of such an automobile battery is too great for the purposes of operating a timepiece of the type disclosed, so that this battery is not connected directly to the timepiece.
  • the lines 22 and 23 are connected in the manner shown in Fig l1 to the resistance 18, and the end 18a ⁇ of the line 23 forms with the resistance 18v a voltage divider, this voltage divider being located outside of the timepiece, although it could of course be located within the casing of the timepiece and fixed to the base plate 1, if desired.
  • a pawl 2t]y is fixed to the tine 4 of the tuning fork 2, this pawl 20 being in the -form of a relatively light leaf spring.
  • a pin 20" is fix-ed to and extends downwardly from the tine 4, as viewed in Fig. 1. That is, the pin 20" is fixed to they face of the tine y4 which is directed toward the front of the timepiece ⁇ and extends toward the front of the timepiece.
  • the tine 4Y is formed with a relatively shallow bore which does not extend more than one quarter of the way through the tine 4 and into which the pin 20' is pressed, so that in this way the natural frequency of the tine 4 is hardly influenced to ⁇ any appreciable extent at all.
  • the leaf spring 20 is fixed to the pin 20r as by being soldered thereto, in the manner shown in Fig. 6, and at its free end leaf spring 20 carries the tooth member 20a made of a very hard material such as glass or hardened steel. Also, precious or semi-precious stones such as rubies or Sapphires are particularly suitable for this purpose. As is evident from Fig. 5, the member 20a is wider than the leaf spring 20 and extends beyond the latter, and this member 20a is fixed to the leaf spring 20' by a suitable adhesive material, for example. The member 20a is so thin that it need not be provided Witha special bevel yor the like to form a tooth.
  • This member 20a of the pawl cooperatesrwith the teeth of the ratchet wheel 21 so that the oscillations of the tine 4 transmit turning impulses to the ratchet wheel 21 through the pawl 20.
  • the ratchet wheel 21 is turned through a predetermined angle at every oscilla-
  • the ratchet wheel 21 yand the pinion 21a are fixed to a common shaft which extends'through the base platel 1.
  • this common shaft extends through Van opening of a dished spring 33 which bears against part of the ratchet wheel 21 and urges the latter away from the base plate 1, so that dished spring 33 acts as a brake retarding the turning movement of the ratchet wheel 21.
  • the spring 33, the ratchet wheel 21, as well as the pawl 20 and member 20a are carefully designed and chosen so that at each oscillation the turning movement transferred to the ratchet wheel 21 by the leaf spring 2t) will result only in a turning of the ratchet wheel in the desired direction through a distance of one tooth.
  • the arrangement is such that the ratchet wheel 21 cannot overrun or turn freely beyond the distance through which it is turned by the pawl.
  • the frictional resistance provided by the spring 3-3 is such that during the return movement of the pawl 20 the ratchet wheel 21 also does not turn and the tooth member 20a runs over a tooth of the pawl to engage in the next space between the teeth. In this way a turning movement is imparted to the ratchet wheel 21 which compels the latter to turn through a number of revolutions which have a direct relation to the rate of oscillation of the tuning fork 2.
  • the ratchet wheel Z1 also turns at a constant speed and in one direction.
  • a gear train is provided to transmit the turning of the ratchet wheel I21 to thehands of the clock, and this gear train includes in Vaddition to the pawl the pinion 21a, the gear 22 meshing with the pinion '21a and turning together with the pinion 212s which meshes with the gear 23 which turns together with the pinion 23a.
  • the pinion 23a meshes with the gear 24 Which turns the pinion 24a, the latter meshing with the gear 25 which turns together with the pinion 25a.
  • the gear 25 is fixed as by a press fit to the shaft 25h to whichthe pinion 25a also is fixed, and this shaft ZSb extends all the way up to the unllustrated face of the clock which carries the numbers.
  • the frequency of oscillations of the tuning fork and the number of teeth of the ratchet wheel 21 as well as the different transmission ratios between the several driving and driven gears are so chosen that the shaft 2517 makes one complete revolution in an hour.
  • the minute hand is fixed to the shaft 25b.y
  • the speed of the minute gear 52S is reduced to one twelfth in a known way.
  • the gear 25a meshes with a gear 26 which turns together with the pinion 26a, the latter yin turn meshing with a gear 27 aixed toi the sleeve 28 freely turnable on the slt-aft 25h.
  • These gears 25a, 26, 26a, and '27 give to the sleeve 284 a speed of rotation which is one twelfth that of the shaft 25h, so that the sleeve 28 turns through a complete revolution in twelve hours, and thus the hour hand is fixedV to the sleeve 28.
  • the various pinions and gears can have the following numbers of teeth to provide the desired transmission to enable accurate time to be kept from ⁇ the tuning fork.
  • Pinion or gear Number of teeth Ratchet wheel 21 360 Pinion 21a 6 Gear 22 f 30 Pinion 22a 6 Gear 23 e 36 Pinion 23ay 6 Gear 24 42 Pinion 24a 6 Minute wheel 25 50 Pinion 25a 10 Gear 26 30 Pinion 26a -..1 8
  • Hour wheel 27 32 A consideration of the above numbers of teeth will show that the minute wheel makes one revolution an hour and the hour wheel makes one revolution in twelve hours.
  • Fig. 4 shows an arrangement where the base plate 1 is provided with a depression which receives a miniature battery 32 which may have a terminal voltage of 1.35 volts, and this battery 32 is maintained within the depression 32a of the base plate 1 by an electrically conductive springy member 30 which is aXed by a screw 31 to a block 29 of insulating material, this block being Xed in a known Way as by a screw or the like to the base plate 1.
  • the force of the spring 30 keeps the battery 32 in position within the recess 31.
  • the caslng of the battery 32 which engages the electrically conductive base plate 1 forms the negative pole of the battery While the positive pole thereof is formed by the cover of the battery which engages the member 30.
  • This member 30 is insulated from the base plate 1 by the block 29, although if desired the member 30 can also be insulated from block 29 and screw 31 in any' suitable Way as by suitable washers and a suitable sleeve into which the screw 31 extends.
  • the electrically conductive springy member 30 is connected with a suitable lead to the positive terminal 16 carried by the support 13 While the negative terminal 15 is in this case connected electrically with the base plate 1.
  • FIG. 7 A wiring diagram illustrating the electrical circuit is shown in Fig. 7.
  • the transistor 19 is shown with its emitter. base, and collector terminals respectively indicated by the letters E, B, and C, respectively.
  • the terminal 16 is connected electrically with the emitter connection E, while the collector connection C is connected with one end of the coil 12 which has approximately five times the number of convolutions of the coil 11, as was pointed out above, the other end of the coil 12 being connected to the negative terminal 15.
  • the capacitance 40 which serves to prevent undesired oscillations.
  • the condenser 34 and resistance 3S are interconnected between the coils 11 and 12, in the manner shown in Fig. 7, and the coil 11 is connected electrically to the base connection of the transistor 19, in the manner shown in Fig. 7.
  • a base plate in combination, a base plate; a tuning fork carried by said base plate and having a pair of tines spaced from said base plate; a permanent magnet carried by one of said tines, electrical coils disposed to cooperate with said permanent magnet for maintaining the oscillations of the tuning fork; a balance Weight carried by the other of said tines and formed with a bore, said other tine and balance weight having a natural frequency substantially equal to the natural frequency of said one tine and permanent magnet; a member located within and shiftable along said bore of said balance weight for adjusting the natural frequency of said other tine and balance weight, ⁇ and means including a pawl connected to the other tine of said fork and a ratchet wheel engageable by' said pawl to convert the oscillations of said fork into a rotary movement.
  • a base plate a tuning fork carried by said base plate and having a pair of tines spaced from said base plate; a permanent magnet carried by one of said tines; electrical coils xedly mounted on said base plate in cooperative relation to said permanent magnet for maintaining the oscillations of the tuning fork; ⁇ a balance weight carried by the other of said tines and formed with a threaded bore; a screw member shorter than said bore located within and threadedly engaging said balance weight in said bore thereof, so that by turning said screw member along said bore the natural frequency of said other tine and balance weight may be regulated, and means including a pawl connected to the other tine of said fork and a ratchet Wheel engageable by said pawl to convert the oscillations of said fork into a rotary movement.
US565452A 1953-06-19 1956-02-14 Electric timepiece Expired - Lifetime US2949727A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH761609X 1953-06-19
CH818678X 1955-02-16

Publications (1)

Publication Number Publication Date
US2949727A true US2949727A (en) 1960-08-23

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US565452A Expired - Lifetime US2949727A (en) 1953-06-19 1956-02-14 Electric timepiece
US665480A Expired - Lifetime US2971323A (en) 1953-06-19 1957-06-13 Electronically-controlled timepiece

Family Applications After (1)

Application Number Title Priority Date Filing Date
US665480A Expired - Lifetime US2971323A (en) 1953-06-19 1957-06-13 Electronically-controlled timepiece

Country Status (8)

Country Link
US (2) US2949727A (de)
CA (3) CA609691A (de)
CH (4) CH312290A (de)
DE (4) DE971059C (de)
FR (4) FR1102373A (de)
GB (4) GB761609A (de)
IT (4) IT558253A (de)
NL (2) NL6410473A (de)

Cited By (4)

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US3057147A (en) * 1956-07-30 1962-10-09 Bulova Watch Co Inc Motion converter
US3106124A (en) * 1961-07-21 1963-10-08 Melpar Inc Tuning forks
US3122047A (en) * 1960-04-25 1964-02-25 Gen Electric Tuning fork
US4205451A (en) * 1979-02-12 1980-06-03 Caterpillar Tractor Co. Displacement transducer

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CA576917A (en) * 1953-06-19 1959-06-02 Bulova Watch Company Inc. Electronic device for the operation of a time piece movement
US2962643A (en) * 1955-04-26 1960-11-29 Omega Brandt & Freres Sa Louis Time-piece
DE1117054B (de) * 1956-04-14 1961-11-09 Kieninger & Obergfell Zeithaltende elektrische Vorrichtung, insbesondere elektrische Uhr
DE1043963B (de) * 1957-02-15 1958-11-13 Kieninger & Obergfell Gangregler fuer eine Uhr, vorzugsweise fuer eine elektrische Uhr
US3118098A (en) * 1957-06-07 1964-01-14 Jahresuhren Fabrik G M B H Oscillating drive electromagnetic motor system
US2957116A (en) * 1957-06-14 1960-10-18 Hurd Lock & Mfg Company Mechano-electric clocks
DE1217883B (de) * 1960-04-06 1966-05-26 Baehni & Co S A Elektrische Uhr mit einem Impulsgeber und einem Antriebsorgan fuer das Raederwerk, unter Verwendung eines magnetostriktiven Schwingers
US3079748A (en) * 1960-06-27 1963-03-05 Sylvania Electric Prod Illuminated electronic time piece
US3202847A (en) * 1960-07-28 1965-08-24 Marcellus S Merrill Tunable vibration pick-up device
DE1279557B (de) * 1961-01-19 1968-10-03 Bulova Watch Co Inc Stimmgabel als zeitbestimmendes Glied fuer eine elektrische Uhr
US3184981A (en) * 1961-01-19 1965-05-25 Bulova Watch Co Inc Electronically-controlled timepiece and motion transformer therefor
US3187082A (en) * 1961-02-01 1965-06-01 Cool Fin Electronics Corp Heat dissipating electrical shield
DE1673740B2 (de) * 1961-05-24 1972-05-10 Fabriques Movado, La Chaux-de-Fonds (Schweiz) Elekrtomechanisches schwingungssystem, insbesondere fuer eine elektrische uhr
GB1017765A (en) * 1961-10-21 1966-01-19 Nihon Denki Tokei Company Ltd Magnetic escapement
DE1235824B (de) * 1962-01-05 1967-03-02 Georges Ceppi Einrichtung zum Antrieb eines zeithaltenden elektrischen Geraets
DE1236423B (de) * 1962-01-05 1967-03-09 Georges Ceppi Oszillator fuer Uhren
US3243951A (en) * 1962-03-28 1966-04-05 Toko Radio Coil Kenkyusho Kk Flexure vibration type electrical vibrator and transistor oscillator utilizing the same
DE1190046B (de) * 1962-06-29 1965-04-01 Diehl Fa Transistor-Schaltverstaerker, insbesondere zur Anwendung bei sich selbst steuernden Uhrenantrieben
DE1274038B (de) * 1962-07-12 1968-07-25 Nihon Denki Tokei Co Ltd Stimmgabeluhr
CH405171A (fr) * 1962-08-11 1965-09-15 Lavet Marius Jean Appareil horaire et procédé de fabrication de cet appareil
BE635700A (de) * 1962-08-15
DE1267619B (de) * 1962-08-22 1968-05-02 Manuf Des Montres Universal Torsionsoszillator fuer elektronische Uhren
US3187575A (en) * 1963-01-07 1965-06-08 Bulova Watch Co Inc Resonant bolometer
CH81663A4 (de) * 1963-01-22 1965-02-15
DE1209961B (de) * 1963-02-20 1966-01-27 Junghans Geb Ag Schaltungsanordnung fuer den elektrisch angetriebenen Schwinger eines zeithaltenden Geraetes
DE1291689B (de) * 1963-03-16 1969-03-27 United States Time Corp Zeithaltendes Geraet
DE1226046B (de) * 1963-05-08 1966-09-29 Bulova Watch Co Inc Mechanischer Schwinger mit magnetischen Steuer- und Triebelementen
DE1235823B (de) * 1963-07-16 1967-03-02 Bulova Watch Co Inc Verbesserungen an mechanischen UEbertragungs-vorrichtungen elektrisch gesteuerter Uhren
CH638164A4 (fr) * 1964-05-15 1966-09-30 Baehni & Co S A Montre électronique
DE1523934A1 (de) * 1965-06-08 1970-03-26 Junghans Gmbh Geb Auf elektromagnetischem Wege in Schwingung gehaltene Stimmgabel
CH483045A (fr) * 1965-08-12 1969-08-29 Movado Montres Dispositif de stabilisation de la fréquence d'oscillation d'un oscillateur mécanique pour appareil destiné à la mesure du temps
US3410081A (en) * 1965-10-04 1968-11-12 Gen Time Corp Drive system for tuning fork timepiece
DE1287519B (de) * 1966-04-22 1969-01-16 Kienzle Uhrenfabriken Gmbh Vorrichtung zur Umwandlung der Schwingungen einer Stimmgabel in eine fortschreitende Drehbewegung
CH478427A (fr) * 1966-05-27 1969-01-31 Centre Electron Horloger Dispositif de limitation de l'amplitude d'oscillation d'un résonateur mécanique pour pièce d'horlogerie électromécanique
US3754152A (en) * 1971-11-03 1973-08-21 Bulova Watch Co Inc Incrementally adjustable capacitor unit for tuning a crystal-controlled oscillator
EP2466401B1 (de) 2010-12-15 2013-08-14 Asgalium Unitec SA Magnetischer Resonator für eine mechanische Uhr
EP2574994A1 (de) 2011-09-29 2013-04-03 Asgalium Unitec SA Stimmgabelresonator für ein mechanisches Uhrwerk
CH707471B1 (fr) 2013-08-05 2014-07-31 Rd Engineering Rudolf Dinger Système régulateur pour montre mécanique.
EP2942673A1 (de) 2014-05-05 2015-11-11 Asgalium Unitec S.A. Mechanischer Stimmgabel-Oszillator für Uhrwerk
CH710691A2 (fr) * 2015-02-03 2016-08-15 Eta Sa Mft Horlogere Suisse Résonateur isochrone d'horlogerie.

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Also Published As

Publication number Publication date
US2971323A (en) 1961-02-14
CH353311A (de) 1961-03-31
DE971059C (de) 1958-12-04
FR1102373A (fr) 1955-10-19
GB818678A (en) 1959-08-19
DE1124433B (de) 1962-02-22
CH333403A (de) 1958-10-15
CA609691A (en) 1960-11-29
IT591162A (de)
DE1023417B (de) 1958-01-23
DE1030263B (de) 1958-05-14
GB761609A (en) 1956-11-14
IT517679A (de)
GB797851A (en) 1958-07-09
CA576917A (en) 1959-06-02
CH334217A (de) 1958-11-15
CA577869A (en) 1959-06-16
FR70323E (fr) 1959-04-06
IT547049A (de)
IT558253A (de)
GB854196A (en) 1960-11-16
FR74802E (fr) 1961-03-03
NL228637A (de)
FR70710E (fr) 1959-07-10
NL6410473A (de) 1964-10-26
CH312290A (de) 1955-12-31

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