US3921386A - Circuit for synchronizing watches driven by a coil-magnet system - Google Patents

Circuit for synchronizing watches driven by a coil-magnet system Download PDF

Info

Publication number
US3921386A
US3921386A US438157*A US43815774A US3921386A US 3921386 A US3921386 A US 3921386A US 43815774 A US43815774 A US 43815774A US 3921386 A US3921386 A US 3921386A
Authority
US
United States
Prior art keywords
transistor
coupled
circuit
collector
emitter
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
US438157*A
Other languages
English (en)
Inventor
Hans Keller
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
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 Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Application granted granted Critical
Publication of US3921386A publication Critical patent/US3921386A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C11/00—Synchronisation of independently-driven clocks
    • G04C11/08—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction
    • G04C11/081—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction using an electro-magnet
    • G04C11/084—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction using an electro-magnet acting on the balance

Definitions

  • T T AT1- ATZ ATZ Fig.1
  • the balance system is unnecessarily supplied with more energy than necessary by the one or more auxiliary driving pulses, so that the amplitude of vibrations of the balance is increased, the battery is additionally loaded, and unwanted transients are likely to appear during the control.
  • the entire circuitry of this conventional kind operates on the principle of phase comparison between the balance vibration frequency and the frequency of the synchronizing signal.
  • it comprises several multivibrator stages and one sawtooth generator for achieving the phase comparison.
  • the known circuit is tailored to a special kind of coil and magnet system employing two concentrical flat coils and one pair of magnet poles in the direction of vibration, so that in the coil limbs arranged in front and behind the reference position, there is generated per semi-vibration of the balance one positive and one negative pulse, from which there compulsorily results the aforementioned use of a bridge or parallel push-pull circuit.
  • This known synchronization method like-wise calls for an extensive electronic circuit, in particular for the derivation of the setting signal by means of a phase comparison, as well as for two two-coil systems of which the one serves as the driving system and the other one as the pick-up system for the phase comparison.
  • the applicant in its earlier German Patent Application P 22 10 542.6 has already proposed choosing the vibration frequency of the balance, as a function of the sign of the voltage as induced in the driving coil of the magnet system, with respect to the polarization of the supply voltage source and with respect to the conductivity type of the driving transistor of the automatic driving circuit, to be either somewhat higher or somewhat lower than half the frequency of the synchronizing signal, periodically once per semivibration of the balance, a current path of the automatic driving circuit in such a way that the energy con tent of the main driving pulse is more reduced, the more the vibration frequency of the balance deviates from half the synchronizing frequency, and to dimension the automatic driving circuit in such a way that upon reduction of the energy of the main driving pulse there is automatically generated an auxiliary driving pulse having the same polarity as the main driving pulse, and that as a function of the energy content of the main driving pulse, the charge of a capacitor as contained in the automatic driving circuit, is varied in the sense of keeping constant the entire energy content of both driving current
  • the arrangement proposed in this earlier application simplifies the aforementioned conventional types of synchronization arrangements in that the synchronization does not act upon each individual pulse of the induced voltage separately. but that both the forward and the backward driving pulses are used in mutual dependency for effecting the synchronization.
  • the present invention relates to the synchronization mechanical vibrators in utility clocks. in particular watches driven via a coilmagnet system. by means of a synchronizing signal whose frequency corresponds to the frequency of a quartz oscillator divided to the order of the vibrator frequency.
  • the driving coil each time during the forward and backward movement of the vibrator, is pulsewisely switched on via a mechanical or electronic switch for maintaining the vibrations. and is thus being passed through through by one or more driving current pulses in the same effective direction. with the frequency of the mechanical vibrator being affected by the synchronizing signal in that the one or more driving current pulses is (are) applied in dependence upon the frequency or phase difference either before and/or after the mechanical vibrator has assumed its rest position.
  • the one or more damping current pulses may be triggered during each complete or semi-vibration of the mechanical vibrator.
  • synchronization may also be realized in such a way that the one or more damping current pulses are only triggered as the result of an external disturbance, hence in the case of a wristwatch. in response to a strong movement of the arm. the frequency or the phase position of the mechanical vibrator is varied in excess of a given threshold value.
  • a resistor and/or a diode and/or a transistor For generating the one or more damping current pulses it has proved particularly suitable for a resistor and/or a diode and/or a transistor to be periodically connected in parallel with the driving coil, or for the driving coil to be periodically sh0rt-circuited Moreover. it may be of advantage to displace the rest position of the center axes of both the driving coil and the magnet system with respect to one another.
  • the one or more damping current pulses are to be triggered only upon exceeding a given limit with respect to the frequency or phase shift and when employing the aforementioned rectangular synchronizing signal. It has proved to be particularly suitable, for controlling the damping current pulses, to use a second synchronizing signal with a shorter switch-on time which is independent of the synchronizing signal controlling the driving current pulses, but of the same frequency. i.e. in such a way that neither the one or more driving current pulses nor the one or more damping current pulses are triggered during both particular periods of time lying between the edges of the two synchronizing signals.
  • the inventive arrangement can still be improved by designing the mechanical vibrator in such a way that its vibration frequency is dependent upon the amplitude of vibrations.
  • the mechanical vibrator. on one hand. may be designed to have such a frequencyamplitude dependence that the vibration frequency is increased as the amplitude of vibrations increases, and that by the one or more driving current pulses as occurring before the rest position of the vibrator. there is supplied more energy than by the one or more driving current pulses occurring after the rest position and, on
  • the other hand may also be provided with such a frequency-amplitude dependence that the vibration frequency is reduced as the amplitude of vibrations increases, and that by the one or more driving current pulses as occurring after the rest position of the vibrator, there is applied more energy than by those occurring before the rest position.
  • the aforementioned setting of the pulse duty factor of the rectangular synchronizing signal in accordance with the smallest spacing as a function of time between the forward and the backward driving current pulse at the highest frequency of the mechanical vibrator can be carried out, for example, in a simple way by means of the already existing frequency divider, in that the pulse width of the output pulse of the frequency divider is coupled to the pulse width of the output pulses of one or more preceding divider stages via either a gate circuit or a flip-flop circuit, so that the output pulse of the frequency divider will no longer have a 1:] pulseinterval ratio, and that instead the pulse width will be determined by the absolute width of the output pulse of one or more preceding frequency-divider stages transmitted at the 1:1 pulse-interval ratio.
  • a circuit for synchronizing watches driven by a coil-magnet system by means of a synchronizing signal having a frequency which corresponds to the frequency of the divided output of a quartz oscillator, said circuit powered by a source of supply voltage having positive and negative poles, comprising: a source of a first synchronizing signal; a driving coil having first and second terminals, said first terminal coupled to the positive pole of said source; a contact having first and second terminals, said first terminal coupled to the second terminal of said coil; a first transistor having base, emitter and collector terminals, said base coupled to said first synchronizing signal, said emitter coupled to the zero point of the circuit and said collector coupled to the second terminal of said contact; a diode; and a first resistor coupled in series with said diode between said diode and said collector.
  • FIGS. 1 to 6 of the accompanying drawings Details of the inventive method and circuit arrangements for carrying out the method will now be explained in greater detail with reference to FIGS. 1 to 6 of the accompanying drawings, in which:
  • FIG. 1 shows various shapes of curves relating to the physical facts of the case on which the invention is based
  • FIG. 2 shows various shapes of curves for explaining the principle on which the invention is based
  • FIG. 3 shows various shapes of curves for explaining the principle on which a further embodiment of the invention is based
  • FIG. 4 shows a simple circuit arrangement for carrying out the inventive method in connection with a contact-making clock system
  • FIG. 5 shows a further embodiment of the circuit arrangement according to FIG. 4,
  • FIG. 6 shows a circuit arrangement for carrying out the inventive method by employing an electronic single-coil circuit for maintaining the vibrations of the mechanical vibrator.
  • the actual vibration period T is composed of the sign-loaded sum of the undisturbed vibration period T and the times AT] and ATZ.
  • the time AT] indicates the time from the undisturbed zero-axis crossing to the point of intersection of both the zero axis and the tangent to the sinusoidal curve changed by the driving pulse N occurring after the rest position of the vibrator.
  • the time ATZ indicates the time between the next undisturbed zero-axis crossing and the point of intersection of the zero axis and the tangent to the sinusoidal curve changed by the driving pulse V as effected before the rest position of the vibrator, with this time thus having to be inserted in the aforementioned formula with a negative sign.
  • the dot-anddashline extending horizontally through FlG.la is supposed to denote the parallel shift of the center axes of both the coil and the magnet system or the aforementioned asymmetry in the case of an even number of magnet pole pairs, respectively.
  • FIGS. lb and It show the pulses N, V of the induced voltage u, as effected asymmetrically in relation to the zero position of the mechanical vibrator, as well as the associated pulse current i flowing in the coil, both as a function of the time t.
  • FIG. 2a shows the course of time of the rectangular synchronizing signal, with the pulse duty factor thereof corresponding to the magnitude B/(A-l-B) or with the pulse-interval ratio thereof corresponding to the magnitude B/A.
  • the time B is equal to (or shorter than) that particular period of time corresponding to the smallest spacing of time between the forward and the backward driving current pulse at both the highest frequency and the smallest amplitude of the mechanical vibrator.
  • FIG. 2b shows the course of time of the timing current pulses, wherein V indicates the driving current pulse triggered before the vibrator reaches its rest position, and wherein N indicates the driving current pulse triggered after the vibrator has reached its rest position.
  • V indicates the driving current pulse triggered before the vibrator reaches its rest position
  • N indicates the driving current pulse triggered after the vibrator has reached its rest position.
  • FIG. 2b shows a case in which the mechanical vibrator is at the same frequency as the synchronizing signal, but is not affected by the latter owing to its phase position.
  • FIG. 20 shows the case where the frequency of the mechanical vibrator is in such a way reduced with respect to the frequency of the synchronizing signal. or has changed to such an extent in its phase position that the driving current pulse N. with respect to time. partly intersects with the pulse component of the synchronizing signal as positively shown in FIG. 2a.
  • energy so to speak. is withdrawn from the mechanical vibrator during the intersecting period owing to the fact that in the driving coil there is flowing a damping current pulse in a direction of effect which is in opposition to that of the driving current pulse. In FIG. 2c. this is indicated by the negatively directed pulse portion N. Both the reduction of the driving current pulse and the additional damping after the vibrator has reached its rest position.
  • FIG. 2d shows a case in which the deviation between the frequency of the mechanical vibrator and the frequency of the synchronizing signal or the phase difference thereof, has already grown to such an extent for example. owing to some strong rotational delay effected upon the mechanical vibrator from the outside that only a damping current pulse N will still be flowing after the rest position of the vibrator. This still further increases the degree of synchronizatron.
  • FIG. 3a shows the shape of curve of the two synchronizing signals in accordance with a further embodiment of the invention.
  • the synchronizing signal I controls the driving current pulses while the synchronizing signal II controls the damping current pulses.
  • the times be tween the two leading edges and between the two trailing edges are indicated by the reference C in FIG. 3a; A and B indicate the times during which driving or damping current pulses may occur respectively.
  • FIG. 3b shows the case corresponding to that of FIG. 2b. i.e. in which the driving current pulses V or N are not being affected by the synchronizing signal.
  • the natural frequency of the mechanical vibrator is reduced or there exists a phase deviation.
  • the backward driving pulse N partly coincides with the positive pulse portion of the synchronizing signal I. Owing to the inventive proposal saying that neither a driving nor a damping current pulse is to be effected during the time C between the two leading edges of the synchronizing signal, the driving current pulse N is thus merely shortened.
  • FIG. 3d shows the case where the driving current pulse N. after the rest position of the vibrator. falls completely within the period of time between the two leading edges of the synchronizing signal, and is thus not at all effective.
  • the driving current pulse is shown to fall partly already within the period B of the dampingsynchronizing signal ll. thus being converted into a damping current pulse N having a direction of effect which is in opposition to the driving current pulse.
  • FIG. 3f. finally. shows the case where the driving current pulse. after the rest position of the vibrator. falls completely within the period B. so that the damping current pulse N appears with its maximum width.
  • FIG. 4 shows a simple circuit arrangement for carrying out the invention with a contact-making clock system.
  • the contact K as actuated by the magnetic balance type. is arranged in series with the driving coil L.
  • the resistor R or the series arrangement consisting of the resistor R and the diode D is disposed in parallel with this series arrangement.
  • This parallel connection is applied with its one end to the voltage-conducting pole of the source of supply voltage U while between the other end thereof and the zero point of the circuit there is connected the collector-emitter path of transistor T1, with the base electrode thereof being controlled by a synchronizing signal from a quartz oscillator and frequency divider 2.
  • the current flux time in the transistor T1 corresponds to the time A of FIG. 2a. It should be noted. however, that in this case, the polarity of the pulse shown in FIG. 2a must be inverted. However, if the transistor T1 is disconnected by the synchronizing signal before the contact K opens. the current direction of the current pulse as flowing in the driving coil L is reversed. because now the current flows across the resistor or across the resistor and the diode respectively, thus acting as a damping current which would thus correspond to the shape of curve shown in FIG. 2c. In this case, coil L acts as an electromotive voltage source since the magnetic system will act upon coil L, thus inducing a voltage. This voltage (see FIG. 1) now drives a current through resistor R and diode D, the direction of which is opposite to that of the above mentioned small current. This reverse current consumes energy and therefore dampens the vibrating system.
  • FIG. 5 shows a further embodiment of the circuit arrangement of FIG. 4 for practical application with a contact-making clock system.
  • the collector-emitter path of the further transistor T2 which is complementary to transistor T1.
  • the second synchronizing signal II from quartz oscillator and frequency divider 3 whose frequency is equal to the frequency, and whose pulse duty factor is equal to or smaller than that of the synchronizing signal as up plied to the base of transistor T1.
  • FIG. 6, finally, shows another circuit arrangement for carrying out the invention with an electronic single-coil circuit for clock drives.
  • This single-coil circuit for example, is substantially known from the applicants earlier German Patent Application corresponding to the German Offenlegungssehrift 2 I I 023. It substantially consists of the transistors T3, T4 and T5, of the resistors RI, R2, R3, R4, and of the capacitor C, as well as of the driving coil L.
  • the transistor T3 acts as a driving transistor and the transistor T4 which is complementary thereto, acts as a control transistor, whereas transistor T5 being of the same conductivity type as transistor T4, serves as an additional transistor.
  • the transistor Tl may now be provided for and which, in FIG. 6, is connected with its collector-emitter path between the base of the driving transistor T3 and the zero point of the circuit, while the synchronizing signal is again applied to the base thereof.
  • the base of the driving transistor T3 and the collector of the control transistor T4 during the current flux period of the transistor T1, are practically applied to the potential of the zero point of the circuit, and in the case of a synchronizing signal of corresponding polarity there will occur the same effects with respect to the driving current pulse or the damping current pulse as in the arrangement according to FIG. 4.
  • FIG. 6, moreover, also shows the further transistor T2 according to FIG. 5, whose emitter-collector path, across the resistor R which, accordingly, corresponds to the resistor R of FIGS. 4 and 5, is connected between the voltage-conducting pole of the source of supply voltage U and the end of the driving coil L not facing the source of supply voltage.
  • the frequency and the pulse duty factor of the second synchronizing signal as applied to the base of transistor T2 there is applicable analogously the same as has been said in connection with explaining FIG. 5 of the drawings. If, accordingly, the pulse duty factor of the synchronizing signals applied to transistors TI and T2 are different, there will again result the mode of operation which has already been explained hereinbefore with reference to FIG. 3.
  • a drive coil having first and second terminals, said first terminal coupled to said positive pole;
  • a first transistor having base, emitter and collector terminals, said base coupled to said first synchronizing signal and said emitter coupled to said negative pole of the circuit;
  • a second transistor having a base, emitter and collector, said base coupled to said second synchronizing signal and said emitter coupled to said positive pole;
  • a third transistor having a base. emitter and collector, the emitter of said third transistor coupled to said negative pole of the circuit and the base of said third transistor coupled to the collector of said first transistor;
  • a fourth transistor having a base, emitter and collector, said collector coupled to the collector of said first transistor
  • a voltage divider coupled between the collector of said third transistor and said negative pole of the circuit, the base of said fourth transistor coupled to a junction point of said voltage divider.
  • a fifth transistor having a base. emitter and collector, said base coupled to the second terminal of said driving coil. said emitter coupled to the emitter of said fourth transistor and said collector coupled to said negative pole of the circuit;

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)
US438157*A 1973-02-24 1974-01-31 Circuit for synchronizing watches driven by a coil-magnet system Expired - Lifetime US3921386A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732309291 DE2309291A1 (de) 1973-02-24 1973-02-24 Verfahren zum synchronisieren mechanischer schwinger von gebrauchsuhren

Publications (1)

Publication Number Publication Date
US3921386A true US3921386A (en) 1975-11-25

Family

ID=5872991

Family Applications (1)

Application Number Title Priority Date Filing Date
US438157*A Expired - Lifetime US3921386A (en) 1973-02-24 1974-01-31 Circuit for synchronizing watches driven by a coil-magnet system

Country Status (6)

Country Link
US (1) US3921386A (ja)
JP (1) JPS501776A (ja)
DE (1) DE2309291A1 (ja)
FR (1) FR2262344B3 (ja)
GB (1) GB1463990A (ja)
IT (1) IT1029540B (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106280A (en) * 1975-03-27 1978-08-15 Hansrichard Schulz Method and apparatus for synchronizing a mechanical oscillating system to the accuracy of a quartz standard
FR2408167A1 (fr) * 1977-11-02 1979-06-01 Haller Jauch & Pabst Urgos Uhr Pendule a balancier a mouvement mecanique et a dispositif de correction electronique
US4309675A (en) * 1978-10-30 1982-01-05 Siegas-Metallwarenfabrik Wilhelm Loh Gmbh & Co. Kg Control circuit for providing a synchronized drive signal to an oscillating system
US4340948A (en) * 1980-04-24 1982-07-20 General Time Corporation Single-coil balance wheel for driving a mechanical movement
US6520674B1 (en) * 1999-08-12 2003-02-18 Seiko Instruments Inc. Mechanical timepiece with posture detector
US6554468B1 (en) * 1999-11-11 2003-04-29 Seiko Instruments Inc. Mechanical timepiece with timed annular balance rotating angle control mechanism
WO2006045824A2 (fr) * 2004-10-26 2006-05-04 Tag Heuer Sa Organe reglant pour montre bracelet, et mouvement mecanique comportant un tel organe reglant
US20070093226A1 (en) * 2003-10-21 2007-04-26 Siemens Aktiengesellschaft Precisely timed execution of a measurement or control action and synchronization of several such actions
US9618905B2 (en) * 2012-10-30 2017-04-11 Fuzhou Xiaoshenlong Watch Technology Research Co., Ltd. Horologe

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451210A (en) * 1966-07-01 1969-06-24 Benrus Corp System for maintaining oscillations in an electric timing mechanism having an oscillatory element
US3576455A (en) * 1969-11-05 1971-04-27 Gen Time Corp Synchronous reluctance motor
US3597634A (en) * 1967-03-09 1971-08-03 Junghans Gmbh Geb Two or more transistor device to energize a driving coil
US3714773A (en) * 1971-11-01 1973-02-06 Timex Corp Amplitude control means for balance wheel oscillator
US3745760A (en) * 1972-01-10 1973-07-17 Timex Corp Electronic switch for timepieces
US3766454A (en) * 1969-08-12 1973-10-16 Co Montres Longines Francillon Electronic timepiece
US3798521A (en) * 1971-05-04 1974-03-19 Golay Bernard Sa Circuitry for synchronizing a mechanical resonator
US3805179A (en) * 1971-09-24 1974-04-16 Golay Bernard Sa Oscillation maintenance method for mechanical resonator and related apparatus
US3806781A (en) * 1971-06-29 1974-04-23 Bernard Sa Electric oscillation maintenance circuit for motor element oscillations
US3818376A (en) * 1972-03-04 1974-06-18 Itt Method and apparatus for synchronizing the balance system of clocks or wrist watches

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451210A (en) * 1966-07-01 1969-06-24 Benrus Corp System for maintaining oscillations in an electric timing mechanism having an oscillatory element
US3597634A (en) * 1967-03-09 1971-08-03 Junghans Gmbh Geb Two or more transistor device to energize a driving coil
US3766454A (en) * 1969-08-12 1973-10-16 Co Montres Longines Francillon Electronic timepiece
US3576455A (en) * 1969-11-05 1971-04-27 Gen Time Corp Synchronous reluctance motor
US3798521A (en) * 1971-05-04 1974-03-19 Golay Bernard Sa Circuitry for synchronizing a mechanical resonator
US3806781A (en) * 1971-06-29 1974-04-23 Bernard Sa Electric oscillation maintenance circuit for motor element oscillations
US3805179A (en) * 1971-09-24 1974-04-16 Golay Bernard Sa Oscillation maintenance method for mechanical resonator and related apparatus
US3714773A (en) * 1971-11-01 1973-02-06 Timex Corp Amplitude control means for balance wheel oscillator
US3745760A (en) * 1972-01-10 1973-07-17 Timex Corp Electronic switch for timepieces
US3818376A (en) * 1972-03-04 1974-06-18 Itt Method and apparatus for synchronizing the balance system of clocks or wrist watches

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106280A (en) * 1975-03-27 1978-08-15 Hansrichard Schulz Method and apparatus for synchronizing a mechanical oscillating system to the accuracy of a quartz standard
FR2408167A1 (fr) * 1977-11-02 1979-06-01 Haller Jauch & Pabst Urgos Uhr Pendule a balancier a mouvement mecanique et a dispositif de correction electronique
US4196579A (en) * 1977-11-02 1980-04-08 Urgos Uhrenfabrik Schwenningen, Haller, Jauch und Pabst GmbH & Co. Mechanically operating pendulum clock with an electronic correcting device
US4309675A (en) * 1978-10-30 1982-01-05 Siegas-Metallwarenfabrik Wilhelm Loh Gmbh & Co. Kg Control circuit for providing a synchronized drive signal to an oscillating system
US4340948A (en) * 1980-04-24 1982-07-20 General Time Corporation Single-coil balance wheel for driving a mechanical movement
US6520674B1 (en) * 1999-08-12 2003-02-18 Seiko Instruments Inc. Mechanical timepiece with posture detector
US6554468B1 (en) * 1999-11-11 2003-04-29 Seiko Instruments Inc. Mechanical timepiece with timed annular balance rotating angle control mechanism
US20070093226A1 (en) * 2003-10-21 2007-04-26 Siemens Aktiengesellschaft Precisely timed execution of a measurement or control action and synchronization of several such actions
US7457601B2 (en) * 2003-10-21 2008-11-25 Siemens Aktiengesellschaft Precisely timed execution of a measurement or control action and synchronization of several such actions
WO2006045824A3 (fr) * 2004-10-26 2006-08-17 Tag Heuer Sa Organe reglant pour montre bracelet, et mouvement mecanique comportant un tel organe reglant
US7396154B2 (en) 2004-10-26 2008-07-08 Tag Heuer Sa Regulating element for wristwatch and mechanical movement comprising one such regulating element
WO2006045824A2 (fr) * 2004-10-26 2006-05-04 Tag Heuer Sa Organe reglant pour montre bracelet, et mouvement mecanique comportant un tel organe reglant
KR100918186B1 (ko) 2004-10-26 2009-09-22 태그-호이어 에스.에이. 손목 시계용 조절 부재 및 이러한 조절 부재를 포함하는 기계식 무브먼트
EP2282240A2 (fr) 2004-10-26 2011-02-09 LVMH Swiss Manufactures SA Organe réglant pour montre bracelet, et mouvement mécanique comportant un tel organe réglant
EP2282240A3 (fr) * 2004-10-26 2011-02-23 LVMH Swiss Manufactures SA Organe réglant pour montre bracelet, et mouvement mécanique comportant un tel organe réglant
US9618905B2 (en) * 2012-10-30 2017-04-11 Fuzhou Xiaoshenlong Watch Technology Research Co., Ltd. Horologe

Also Published As

Publication number Publication date
DE2309291A1 (de) 1974-08-29
JPS501776A (ja) 1975-01-09
FR2262344B3 (ja) 1977-01-07
FR2262344A3 (ja) 1975-09-19
IT1029540B (it) 1979-03-20
GB1463990A (en) 1977-02-09

Similar Documents

Publication Publication Date Title
US3921386A (en) Circuit for synchronizing watches driven by a coil-magnet system
US3149274A (en) Electromagnetic vibrating drive
US6809485B2 (en) Driving device for oscillatory actuator
US3124731A (en) Electronic time pieces
US3238431A (en) Oscillating resonator for a timepiece with synchronized driving oscillator
US2950447A (en) Electromechanical transducer apparatus and systems embodying the same
US3618311A (en) Synchronized horological system
US3798521A (en) Circuitry for synchronizing a mechanical resonator
US3118098A (en) Oscillating drive electromagnetic motor system
US3421309A (en) Unitized tuning fork vibrator
US3509437A (en) Timepiece drive
US3818376A (en) Method and apparatus for synchronizing the balance system of clocks or wrist watches
US3481138A (en) Drive for a balance in an electric timepiece
US3859781A (en) Synchronization system for watches
US4340948A (en) Single-coil balance wheel for driving a mechanical movement
US3806781A (en) Electric oscillation maintenance circuit for motor element oscillations
US3534544A (en) Electronic watch
GB1128050A (en) Improvements in electrical circuitry for timekeeping instruments
US3892066A (en) Synchronized watch movement
US3209529A (en) Electronically controlled stop-watch
US3699762A (en) Synchronized contact watch
US3609487A (en) Dc motor and constant-speed control circuit
US3596461A (en) Electromagnetic driving system for timepieces
US3410081A (en) Drive system for tuning fork timepiece
US4007582A (en) Method and apparatus for synchronizing an electrodynamic clockwork drive