US3792577A - Quartz crystal wrist watch - Google Patents

Quartz crystal wrist watch Download PDF

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Publication number
US3792577A
US3792577A US00308214A US3792577DA US3792577A US 3792577 A US3792577 A US 3792577A US 00308214 A US00308214 A US 00308214A US 3792577D A US3792577D A US 3792577DA US 3792577 A US3792577 A US 3792577A
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US
United States
Prior art keywords
correcting
circuit means
electro
switch
quartz crystal
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
US00308214A
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English (en)
Inventor
K Fujita
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Individual
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Individual
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Publication of US3792577A publication Critical patent/US3792577A/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G5/00—Setting, i.e. correcting or changing, the time-indication
    • G04G5/02—Setting, i.e. correcting or changing, the time-indication by temporarily changing the number of pulses per unit time, e.g. quick-feed method
    • 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
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
    • G04F8/006—Apparatus for measuring unknown time intervals by electromechanical means running only during the time interval to be measured, e.g. stop-watch

Definitions

  • the quartz wrist watch de- This invention relates to time correction of a quartz 5 picted consists ofan oscillator including quartz crystal crystal wrist watch having an electro-mechanical converter such as a pulse motor operated by low frequency driving signals of the order of several Hz or less.
  • Quartz crystal wrist watches have high accuracies, their monthly error being on the order of t 5 seconds. For this reason, the time indication of such watches is seldom incorrect. However, because of the accuracy involved, wearers become anxious about errors within the range of several seconds which arise after long use and may be eager to correct such errors. In conventional quartz crystal watches, the correction of such small errors, if the error was a lag, required stopping the watch once, advancing the minute hand, and resetting the watch. This complicated procedure detracts from the otherwise valuable high accuracy provided by such watches.
  • means is provided so that correction of operation of a single manualswitch.
  • a quartz crystal wrist watch having a quartz crystal time standard oscillator for producing a high frequency time standard signal, an integrated pulse shaper circuit means including counters for reducing the frequency of said time standard signals to a low frequency timing signal, and an electro-mechanical converter means for driving the time keeping apparatus of the watch in response to said time keeping signal.
  • a manual correcting switch and a quick-feed correcting circuit operated by said correcting switch are provided for the selective application of pulses to said electromechanical converter means for correcting the second hand of the watch.
  • the correcting circuit means may include a monostable multivibrator. Said correcting'switch is also connected so as to serve as a preset switch for a counter circuit of said pulse shaper means, when operated.
  • an object of this invention is to provide means for insuring an easy and sure correction of the second hand in a quartz crystal time piece.
  • FIG. 1 is a'block and schematic diagram of the electric circuitry and time indication mechanism of a quartz crystal wrist watch in accordance with the invention
  • FIG. 2 is a waveform diagram showing the current waveforms at five locations in the circuit of FIG. 1.
  • Said pulse shaper consists of a series of divider circuits for reducing the frequency of the high frequency time standard signal from the oscillator to low frequency timing signals at output terminals OUT, and OUT;.
  • the output from output terminal OUT is applied through inverters I is applied through inverters I and I, to one end of motor driving coil L.
  • the output of output terminal OUT is applied through NOR gate NR, and inverter I, to the other end of said motor driving coil.
  • the current i passes through said driving coil.
  • pulse shaper C may have 15 binary counter stages.
  • the waveforms for such an embodiment are depicted in FIG. 2.
  • the motor driving current i consists of alternating pulses at one second intervals to alternately generate north and south poles in stator S.
  • Rotor RT is polarized into six poles as shown in FIG. 1, so that said rotor is turned by I signal from switch SW and a feedback signal from the output of inverter 1,.
  • the signal applied to NOR is designated OUT Resistor R and capacitor C determine the time constant of operation of the multivibrator.
  • Switch SW is also connected to terminal PR of pulse shaper C, which terminal is connectedso as to preset one of the counters of the chain of counters in pulse shaper C each time switch SW is closed.
  • the pulse width of the signal OUT is made equal to the pulse width of the signal at output OUT
  • a capacitor is connected in parallel with switch SW.
  • the foregoing circuitry can be formed from complementary field-effect transistors, with the exception of a few exterior parts such as the capacitors, so as to limit the power drain.
  • the pulse shaper C may be formed completely from such complementary field-effect transistors. If this approach is utilized to produce monolithic integrated circuits 1C, a strong driving signal may be produced in a compact quartz crystal watch. 7
  • a quartz crystal wrist watch comprising quartz crystal oscillator means for producing a high frequency a time standard signal; pulse shaper circuit means for receiving said high frequency time standard signal; a time indication drive train including a second hand; an electro-mechanical converter means for driving said time keeping drive train and second hand in response to said timing signals; a manual correcting switch; and quickfeed correcting circuit means for applying a time correction pulse to said electro-mechanical converter in response to the operation of said correcting switch for advancing said second hand an incremental distance, said pulse shaper circuit means including a plurality of counter stages, said correcting circuit means being adapted to operatively connect said correcting switch to at least one of said counter stages for applying a presetting signal to said counter stage in response to the operation of said correcting switch, said correcting circuit means being adapted so that a time correcting pulse is applied to said electro-mcchanical converter means when said correcting switch is closed, and the counter to which said correcting switch is connected is preset when said correcting switch is closed.
  • a quartz crystal wrist watch comprising quartz crystal oscillator means for producing a high frequency time standard signal; pulse shaper circuit means for receiving said high frequency time standard signal; a time indication drive train including a second hand; an electro-mechanical converter means for driving said time keeping drive train and second hand in response to said timing signals; a manual correcting switch; and quickfeed correcting circuit means for applying a time correcting pulse to said electro-mechanical converter in response to each operation of said correcting switch for advancing said second hand an incremental distance, said correcting circuit means including a monostable multivibrator circuit means intermediate said correcting switch and said electro-mechanical converter means.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)
  • Control Of Stepping Motors (AREA)
US00308214A 1971-11-18 1972-10-20 Quartz crystal wrist watch Expired - Lifetime US3792577A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46091893A JPS4857678A (xx) 1971-11-18 1971-11-18

Publications (1)

Publication Number Publication Date
US3792577A true US3792577A (en) 1974-02-19

Family

ID=14039225

Family Applications (1)

Application Number Title Priority Date Filing Date
US00308214A Expired - Lifetime US3792577A (en) 1971-11-18 1972-10-20 Quartz crystal wrist watch

Country Status (8)

Country Link
US (1) US3792577A (xx)
JP (1) JPS4857678A (xx)
CH (2) CH576165B5 (xx)
DE (1) DE2256540C3 (xx)
FR (1) FR2160603B1 (xx)
GB (1) GB1385276A (xx)
HK (1) HK43776A (xx)
IT (1) IT966291B (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943695A (en) * 1973-02-19 1976-03-16 Kienzle Uhrenfabriken Gmbh Quartz crystal controlled timekeeping apparatus
US3964220A (en) * 1970-04-15 1976-06-22 National Gypsum Company Control joint with tear strip
US4092820A (en) * 1975-03-25 1978-06-06 Citizen Watch Company Limited Electronic timepiece
US4095167A (en) * 1975-12-22 1978-06-13 Harold James Weber Concealed structure locating and surveying exciter
US4095406A (en) * 1974-09-06 1978-06-20 Kabushiki Kaisha Daini Seikosha Second adjustment system in an electronic watch
US4133169A (en) * 1974-08-30 1979-01-09 Ebauches S.A. Electronic circuit for a quartz crystal watch
US4134254A (en) * 1974-12-17 1979-01-16 Casio Computer Co., Ltd. Electronic timepiece device
US4150536A (en) * 1976-01-28 1979-04-24 Citizen Watch Company Limited Electronic timepiece
US4209970A (en) * 1975-03-25 1980-07-01 Citizen Watch Co., Ltd. Electronic timepiece

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1399024A (en) * 1972-07-12 1975-06-25 Suisse Pour Lindustrie Horloge Electronic correction circuit in a timepiece
JPS5740759B2 (xx) * 1973-07-17 1982-08-30
IT1039870B (it) * 1974-07-26 1979-12-10 Eurosil Gmbh Disposizione di connessioni per puntare rispettivamente per regolare un dispositivo per la misurazione del tempo
DE2658546C2 (de) * 1975-12-25 1983-07-28 Citizen Watch Co., Ltd., Tokyo Elektronische Uhr
JPS5922192B2 (ja) * 1976-07-09 1984-05-24 セイコ−光機株式会社 リセツト解除時に生ずる時間誤差を補償する時計用回路
GB1537721A (en) * 1976-10-25 1979-01-04 Suisse Horlogerie Time setting and correcting circuit for electronic timepieces
JPS5798884A (en) * 1980-12-12 1982-06-19 Casio Comput Co Ltd Time correction system for hand type electronic watch
JPS62247281A (ja) * 1987-03-05 1987-10-28 Seiko Epson Corp 指針式電子時計
JPS62247282A (ja) * 1987-03-05 1987-10-28 Seiko Epson Corp 指針式電子時計
US8318278B2 (en) * 2007-11-21 2012-11-27 Lockheed Martin Corporation Adhesive attachment and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643419A (en) * 1969-07-14 1972-02-22 California Inst Of Techn Apparatus for fine adjustment of signal frequency
US3643418A (en) * 1969-05-29 1972-02-22 Vogel Paul Time-setting device for an electronic watch
US3690058A (en) * 1969-09-25 1972-09-12 Suwa Seikosha Kk Electric or electronic timepiece
US3707071A (en) * 1971-03-12 1972-12-26 Hamilton Watch Co Solid state timepiece

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH1342362A4 (xx) * 1962-11-16 1968-02-15
DE1773675A1 (de) * 1967-08-28 1971-04-01 Benrus Watch Co Inc Elektrouhrsystem
US3560998A (en) * 1968-10-16 1971-02-02 Hamilton Watch Co Electronically controlled timepiece using low power mos transistor circuitry

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643418A (en) * 1969-05-29 1972-02-22 Vogel Paul Time-setting device for an electronic watch
US3643419A (en) * 1969-07-14 1972-02-22 California Inst Of Techn Apparatus for fine adjustment of signal frequency
US3690058A (en) * 1969-09-25 1972-09-12 Suwa Seikosha Kk Electric or electronic timepiece
US3707071A (en) * 1971-03-12 1972-12-26 Hamilton Watch Co Solid state timepiece

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964220A (en) * 1970-04-15 1976-06-22 National Gypsum Company Control joint with tear strip
US3943695A (en) * 1973-02-19 1976-03-16 Kienzle Uhrenfabriken Gmbh Quartz crystal controlled timekeeping apparatus
US4133169A (en) * 1974-08-30 1979-01-09 Ebauches S.A. Electronic circuit for a quartz crystal watch
US4095406A (en) * 1974-09-06 1978-06-20 Kabushiki Kaisha Daini Seikosha Second adjustment system in an electronic watch
US4134254A (en) * 1974-12-17 1979-01-16 Casio Computer Co., Ltd. Electronic timepiece device
US4092820A (en) * 1975-03-25 1978-06-06 Citizen Watch Company Limited Electronic timepiece
US4209970A (en) * 1975-03-25 1980-07-01 Citizen Watch Co., Ltd. Electronic timepiece
US4095167A (en) * 1975-12-22 1978-06-13 Harold James Weber Concealed structure locating and surveying exciter
US4150536A (en) * 1976-01-28 1979-04-24 Citizen Watch Company Limited Electronic timepiece

Also Published As

Publication number Publication date
CH1686572A4 (xx) 1975-12-31
DE2256540A1 (de) 1973-05-24
HK43776A (en) 1976-07-16
GB1385276A (en) 1975-02-26
DE2256540B2 (de) 1979-10-31
CH576165B5 (xx) 1976-05-31
FR2160603A1 (xx) 1973-06-29
IT966291B (it) 1974-02-11
JPS4857678A (xx) 1973-08-13
DE2256540C3 (de) 1981-04-30
FR2160603B1 (xx) 1976-04-23

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