US3810356A - Time correcting apparatus for an electronic timepiece - Google Patents

Time correcting apparatus for an electronic timepiece Download PDF

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Publication number
US3810356A
US3810356A US00351943A US35194373A US3810356A US 3810356 A US3810356 A US 3810356A US 00351943 A US00351943 A US 00351943A US 35194373 A US35194373 A US 35194373A US 3810356 A US3810356 A US 3810356A
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United States
Prior art keywords
time
electronic timepiece
correcting
display
recited
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Expired - Lifetime
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US00351943A
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English (en)
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K Fujita
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Suwa Seikosha KK
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Suwa Seikosha KK
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Publication of US3810356A publication Critical patent/US3810356A/en
Priority to US05/686,426 priority Critical patent/USRE29720E/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G5/00—Setting, i.e. correcting or changing, the time-indication
    • G04G5/04—Setting, i.e. correcting or changing, the time-indication by setting each of the displayed values, e.g. date, hour, independently
    • G04G5/043—Setting, i.e. correcting or changing, the time-indication by setting each of the displayed values, e.g. date, hour, independently using commutating devices for selecting the value, e.g. hours, minutes, seconds, to be corrected
    • G04G5/045—Setting, i.e. correcting or changing, the time-indication by setting each of the displayed values, e.g. date, hour, independently using commutating devices for selecting the value, e.g. hours, minutes, seconds, to be corrected using a sequential electronic commutator

Definitions

  • This invention relates to electronic timepieces, and in particular, to electronic timepieces provided with a digital time indication formed from a liquid crystal display, a light emitting diode display or the like.
  • an electronic timepiece having a multi-digit digital display of time is provided with time correcting circuit means'including'a manually operable selecting switch and a manually operable correcting switch. Said circuit.
  • Said circuit means is adapted to select at least one of said digits of timefor correction in response to theoperation of said selecting switch and to correct the selected digit by the operation .of said correcting switch.
  • Said circuit means further includes means for selectively actuating the selected digits so as to provide a visual indication of selection. Said visual indication of selection may constitute the flickering 'of the digits to be corrected.
  • FIG. I is a top plan view of an electronic timepiece in accordance with the invention.
  • FIG. 2 is a circuit diagram of the electronic timepiece of FIG. 1; I
  • FIG. 3 is a circuit diagram of the control circuit of FIG. 2; and i switch for selecting the digit to be corrected.
  • a digit can refer to one of the two digits representative of each of the second, minute, hour and day displays, or to both of the respective digits. Further, it can refer to one of the seven days of the week, or to all of the seven days of the week.
  • the second push button 8, is a correcting switch for correcting the selected digit.
  • the minutes digit reads 34. If the minute digit is selected by selecting switch S the digit starts flickering or blinking. With each depression of correcting switch S,, the number appearing in the minute display is indexed so as to increase by one to effect time correction. By operating selector switch S each of the other digits of time can be selected for correction.
  • the watch is provided with a crown S on 'the side thereof which constitutes a safety switch.
  • a safety circuit is actuated and push buttons S and 5,, are deactivated and will not function even if pushed.
  • the safety circuit In order to render the push buttons operative, the safety circuit must be releasedby pulling out crown S
  • the circuit of the electronic timepiece in accordance with the invention is shown in the block diagram of FIG. 2, wherein the high frequency time standard signal of a crystal'oscillator X (for example 16,384 Hz) is divided by a counter chain consisting of sixstages I-6.
  • Counter 3 divides the 1-minute signal into a l-hour signal, counting60 minutes.
  • Counter 4 divides the 1-hour signal into a l-day signal, counting 24 hours.
  • Counter 5 divides the l-day signal into a l-month signal by counting 31 days.
  • the counter 6 likewise divides the 1-day signal, but to produce a l-week signal, counting the 7 days of the week.
  • a decoder 7-1 1 is connected to receive the BCD output signal of each of counters 2-6 to transform the BCD code signal outputs of said counters into a decimal signal-DEC for actuating the corresponding liquid crystal displays representative of second (L minute (L ),,hour (L date (L,,) and day of the week (L
  • Each decoder is connected toits respective liquid crystal display. through-a NAND gate circuit, the other input to each of said NAND gates being from control
  • FIG. 4 is a timing chart of the circuit of FIGS. 2 and Referring now to FIG. I, the electronic wrist watch depicted is provided for purposes of. illustration with a liquid crystal display adapted to display date, day, hour, minute and second it being understood that such display could include light emitting diodes or the like.
  • control circuit 12 output S of control circuit 12 is coupled to the NAND gate associated with the second liquid crystal display L
  • control circuit 12 outputs M I-l,,, D,,, W are respectively connected to the NAND gate associated with minute liquid crystal display L hour liquid crystal display L day liquid crystal display L and day of the week liquid crystal dis-
  • the outputs S,,, M,,,, H,,, D,, and W, are at a high state and the liquid crystal displays are driven normally by the decimal outputs of the respective decoders 7-l1.
  • a low frequency signal F of a frequency frequency signal F is applied through output M, to the NAND gate between decoder 8 and liquid crystal display L so that said liquid crystal display is switched on and off at the frequency of low frequency signal F.
  • the frequency of signal F is selected so that the rate of switching of the selected liquid crystal display elements can be detected by the users eyes, the selected display is flickered and can clearly be distinguished from the other'displays which are continuously displayed'
  • the signal applied by correcting switch 5, is applied through control circuit 12 to the selected one of outputs S,,, M,,, H,,, D,, and W which are respectively connected to the correcting terminal ADJ of one of counters 2-6 for the selective correction of the setting of the selected digit.
  • FIGS. 3 and 4 we find a circuit diagram A for control circuit l2 and a timing chart for certain of the signals thereof.
  • Control circuit 12 includes three D-type flip-flops ,FF FF and FE, connected to form a hexadic Johnson -A B O.
  • FF FF and FE D-type flip-flops
  • the gate is closed and when A is l the gate is open.
  • NOR gates N through N are conventional NOR gates having a truth table as follows:
  • FIG. 3 has the qaiagl table
  • Switch S is closed thus applying a pulse (s to all three flip-flops to actuate the same and effect an opening of NAND gates G and G, by the generating of a 1 condition at NOR gate N
  • the opening of NAND gates G and 6. allows signal F supplied from counter l to become output 8,, (s of NAND gate 6., and is therefore applied to display element L causing the same to flicker. Since only display element L is flickering, the operator can' easily discern that the seconds digit is being corrected.
  • a pulse is supplied by opened NAND gate 6;, and becomes correction signal S (s.,) which is applied to the seconds counter 2 to correct the seconds time display.
  • selector switch S is closed twice to apply two pulses (s to the flipflop circuits, to thereby change the state of the counter.
  • NOR gate N is opened, thus making the output thereof a 1 hence opening NAND gates G and G
  • the opening of gate G allows signal F to be applied through the control circuit to the digital display element L as signal H to effect a flickering of said display elements.
  • a correction'signal is applied by correction switch 8,, through gate G to hours counter 4 to thereby effect correction of the hours display.
  • two switches permit the selective correction of any digit of time indication, including second, minute, hour, day and date of a digital display such as a liquid crystal display or a light -emitting diode display.
  • a digital display such as a liquid crystal display or a light -emitting diode display.
  • This structure eliminates the necessity of separate switches for each digit, thereby permitting the production of a compact electronic timepiece such as a wrist watch capable of displaying a wide range of information.
  • an AC signal may also be utilized to drive a liquid crystal display.
  • the Idigitto be corrected would be indicated by changing the driving frequency of the digit to be corrected, for example, by providing two AC driving steps, 32 Hz and 8 Hz.
  • time correcting circuit means a manually operable selecting switch means and a manually operable correcting switch means coupled to said time correcting circuit means
  • said time correcting circuit means being'operatively coupled to the dividers of said time keeping circuit means associated with the digits of time of said display means to be corrected for the selective sequential selection of each digit of time for correction by themanual operation of said selecting switch and for the selective correction of said selected digit of time by the manual operation of said correcting switch
  • said time correction circuit means being further coupled to each digit of time of said display means and adapted to dispose'the selected digits of time of said digital display means so as to render same distinguishable from the otherdigits of said display means.
  • said time correcting circuit. means includes a plurality of gate meansdefining outputs of said correct ing circuit means, one of said gate means being operatively coupled to each of the divider stages producing said time-keeping signals, said correcting switch means being operatively coupled to each of said gate means for the application of a correcting signal thereto, said time correcting circuit means further including counter means having a plurality of outputs representing the sequential count of said counter means, one of said countermeans outputs being connected to each of said gate means for the sequential actuation thereof to en able the actuated gate means to pass said correcting signal, said selecting switch means being operatively coupled to said counter means for the sequential index-- v 6 ing of said counter means.
  • identification signal is derived from an output of one of said divider stages selected to produce a low-frequency identification signal for application to each of said further gate means for transmittal to the selected NAND gate means.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Indicating Measured Values (AREA)
US00351943A 1972-04-17 1973-04-17 Time correcting apparatus for an electronic timepiece Expired - Lifetime US3810356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/686,426 USRE29720E (en) 1972-04-17 1976-05-14 Time correcting apparatus for an electronic timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47038529A JPS5219979B2 (en)) 1972-04-17 1972-04-17

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/686,426 Reissue USRE29720E (en) 1972-04-17 1976-05-14 Time correcting apparatus for an electronic timepiece

Publications (1)

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US3810356A true US3810356A (en) 1974-05-14

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US (1) US3810356A (en))
JP (1) JPS5219979B2 (en))
DE (1) DE2319437C3 (en))
FR (1) FR2180786B1 (en))
GB (1) GB1404514A (en))
HK (1) HK3578A (en))
MY (1) MY7800063A (en))

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925978A (en) * 1972-07-31 1975-12-16 Suwa Seikosha Kk Time correcting arrangement for electronic wrist watches
US3939640A (en) * 1974-12-12 1976-02-24 Kahn Leonard R System for illuminating the display of a wrist watch
US3943696A (en) * 1973-07-13 1976-03-16 Ebauches S.A. Control device for setting a timepiece
US3953964A (en) * 1975-02-13 1976-05-04 Timex Corporation Single switch arrangement for adjusting the time being displayed by a timepiece
US3953963A (en) * 1973-08-09 1976-05-04 Kabushiki Kaisha Suwa Seikosha Electronic digital display timepiece correction device
DE2557857A1 (de) * 1975-01-10 1976-07-15 Ebauches Sa Steuer- und zeiteinstellvorrichtung fuer eine elektronische uhr
US3975897A (en) * 1974-01-30 1976-08-24 Kabushiki Kaisha Suwa Seikosha Electronic display digital wristwatch
US3978296A (en) * 1974-03-07 1976-08-31 Kabushiki Kaisha Daini Seikosha Switching system for an electronic timepiece
US3979681A (en) * 1974-11-27 1976-09-07 Solid State Scientific, Inc. System and method for decoding reset signals of a timepiece for providing internal control
US3988886A (en) * 1973-08-14 1976-11-02 Casio Computer Co., Ltd. Time setting device for an electronic watch
US4020626A (en) * 1974-05-14 1977-05-03 Kabushiki Kaisha Daini Seikosha Electronic timepiece
US4024676A (en) * 1970-09-12 1977-05-24 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US4028878A (en) * 1974-12-11 1977-06-14 Ebauches S.A. Control device for an electronic wrist watch
US4028879A (en) * 1974-07-26 1977-06-14 Eurosil G.M.B.H. Switching arrangement for setting time-measuring apparatus
US4030283A (en) * 1974-03-25 1977-06-21 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Electrically driven time piece with means for effecting a precise setting of time
US4033108A (en) * 1976-03-02 1977-07-05 Bulova Watch Company, Inc. Automatic cut-off setting system for LED display in a solid-state watch
US4033109A (en) * 1974-11-21 1977-07-05 Tokyo Shibaura Electric Co., Ltd. Time correction circuits for electronic timepieces
US4043111A (en) * 1974-10-18 1977-08-23 Hitachi, Ltd. Indicated time-correcting device of digital display timepiece
US4044547A (en) * 1974-12-11 1977-08-30 Kabushiki Kaisha Daini Seikosha Time adjusting system for an electronic timepiece
US4058971A (en) * 1976-04-26 1977-11-22 Hughes Aircraft Company Digital wristwatch and stopwatch
US4078376A (en) * 1975-07-21 1978-03-14 Freeman Alfred B Electronic watch having optical and audible readouts and alarm and stopwatch capabilities
US4083175A (en) * 1975-05-14 1978-04-11 Frontier Manufacturing, Inc. Solid state watch with single time and date selector button
US4084401A (en) * 1975-07-09 1978-04-18 Hughes Aircraft Company Digital watch with two buttons and improved setting and display control
US4090350A (en) * 1975-05-06 1978-05-23 Citizen Watch Co., Limited Electronic timepiece
US4141208A (en) * 1976-01-19 1979-02-27 Hughes Aircraft Company Digitally tuned timepiece
US4150537A (en) * 1975-03-11 1979-04-24 Citizen Watch Company Limited Electronic timepiece and method for testing operation of the same
US4170870A (en) * 1972-07-12 1979-10-16 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Control unit for electronic time-piece display
US4176516A (en) * 1975-06-13 1979-12-04 Nippon Electric Co., Ltd. Arrangement for putting an electronic timepiece right with minute indication advanced at first
US4182113A (en) * 1972-04-21 1980-01-08 Casio Computer Co., Ltd. Electronic time keeping device with time-shared timing indicator
US4199932A (en) * 1977-07-05 1980-04-29 Ebauches Sa Electronic timepiece with mixed time setting
US4225847A (en) * 1978-03-16 1980-09-30 Tokyo Shibaura Denki Kabushiki Kaisha Display circuit
US4257117A (en) * 1978-04-11 1981-03-17 Ebauches S.A. Electronic watch with touch-sensitive keys
US4258431A (en) * 1977-12-09 1981-03-24 Citizen Watch Co., Ltd. Electronic timepiece having an analog display device and a digital display device
US4300221A (en) * 1978-07-06 1981-11-10 Kabushiki Kaisha Seikosha Electronic timepiece
US4308608A (en) * 1979-07-31 1981-12-29 Toyota Jidosha Kogyo Kabushiki Kaisha Digital electronic timepieces
US4316276A (en) * 1974-08-15 1982-02-16 Bulova Watch Company, Inc. Key-operated solid-state timepieces
US4355381A (en) * 1979-05-23 1982-10-19 Seikosha Co., Ltd. Electronic timepiece with electro-optic display
USRE31225E (en) * 1975-02-13 1983-05-03 Timex Corporation Single switch arrangement for adjusting the time being displayed by a timepiece
USD581290S1 (en) * 2008-06-10 2008-11-25 Sandra L Corchado Digital watch with calendar and reminder displays
USD740693S1 (en) * 2013-08-30 2015-10-13 Scott Carmichael Watch

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047336A (en) * 1975-10-16 1977-09-13 Emerson Electric Co. Lighting system
JPS52110662A (en) * 1976-03-15 1977-09-16 Seiko Instr & Electronics Ltd Digital alarm clock
GB1533455A (en) 1976-07-30 1978-11-22 Elliott Bros Display arrangements
JPS5824233Y2 (ja) * 1976-12-22 1983-05-24 ソニー株式会社 電子時計
JPS56157116A (en) * 1980-05-07 1981-12-04 Clarion Co Ltd Mode display mechanism capable of preset
JPS57144487A (en) * 1981-03-03 1982-09-07 Fujitsu Ltd Time setting method for clock
JPH065308B2 (ja) * 1982-07-09 1994-01-19 セイコーエプソン株式会社 アナログ電子時計
JPH0166095U (en)) * 1988-10-12 1989-04-27

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576099A (en) * 1969-04-22 1971-04-27 Hamilton Watch Co Solid state timepiece having electro-optical time display
US3699763A (en) * 1971-07-06 1972-10-24 Us Navy 24-hour digital clock
US3717990A (en) * 1970-12-17 1973-02-27 Suwa Seikosha Kk Time correction device for digital watches
US3721084A (en) * 1971-08-03 1973-03-20 Hamilton Watch Co Solid state watch incorporating large-scale integrated circuits
US3733810A (en) * 1970-03-06 1973-05-22 Rolex Montres Timepiece with electronically designed digital read-out

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576099A (en) * 1969-04-22 1971-04-27 Hamilton Watch Co Solid state timepiece having electro-optical time display
US3733810A (en) * 1970-03-06 1973-05-22 Rolex Montres Timepiece with electronically designed digital read-out
US3717990A (en) * 1970-12-17 1973-02-27 Suwa Seikosha Kk Time correction device for digital watches
US3699763A (en) * 1971-07-06 1972-10-24 Us Navy 24-hour digital clock
US3721084A (en) * 1971-08-03 1973-03-20 Hamilton Watch Co Solid state watch incorporating large-scale integrated circuits

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024676A (en) * 1970-09-12 1977-05-24 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US4182113A (en) * 1972-04-21 1980-01-08 Casio Computer Co., Ltd. Electronic time keeping device with time-shared timing indicator
US4170870A (en) * 1972-07-12 1979-10-16 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Control unit for electronic time-piece display
US3925978A (en) * 1972-07-31 1975-12-16 Suwa Seikosha Kk Time correcting arrangement for electronic wrist watches
US3943696A (en) * 1973-07-13 1976-03-16 Ebauches S.A. Control device for setting a timepiece
US3953963A (en) * 1973-08-09 1976-05-04 Kabushiki Kaisha Suwa Seikosha Electronic digital display timepiece correction device
US3988886A (en) * 1973-08-14 1976-11-02 Casio Computer Co., Ltd. Time setting device for an electronic watch
US3975897A (en) * 1974-01-30 1976-08-24 Kabushiki Kaisha Suwa Seikosha Electronic display digital wristwatch
US3978296A (en) * 1974-03-07 1976-08-31 Kabushiki Kaisha Daini Seikosha Switching system for an electronic timepiece
US4030283A (en) * 1974-03-25 1977-06-21 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Electrically driven time piece with means for effecting a precise setting of time
US4020626A (en) * 1974-05-14 1977-05-03 Kabushiki Kaisha Daini Seikosha Electronic timepiece
US4028879A (en) * 1974-07-26 1977-06-14 Eurosil G.M.B.H. Switching arrangement for setting time-measuring apparatus
US4316276A (en) * 1974-08-15 1982-02-16 Bulova Watch Company, Inc. Key-operated solid-state timepieces
US4043111A (en) * 1974-10-18 1977-08-23 Hitachi, Ltd. Indicated time-correcting device of digital display timepiece
US4033109A (en) * 1974-11-21 1977-07-05 Tokyo Shibaura Electric Co., Ltd. Time correction circuits for electronic timepieces
US3979681A (en) * 1974-11-27 1976-09-07 Solid State Scientific, Inc. System and method for decoding reset signals of a timepiece for providing internal control
US4028878A (en) * 1974-12-11 1977-06-14 Ebauches S.A. Control device for an electronic wrist watch
US4044547A (en) * 1974-12-11 1977-08-30 Kabushiki Kaisha Daini Seikosha Time adjusting system for an electronic timepiece
US3939640A (en) * 1974-12-12 1976-02-24 Kahn Leonard R System for illuminating the display of a wrist watch
DE2557857A1 (de) * 1975-01-10 1976-07-15 Ebauches Sa Steuer- und zeiteinstellvorrichtung fuer eine elektronische uhr
DE2602317A1 (de) * 1975-02-13 1976-08-26 Timex Corp Elektronische uhr
US3953964A (en) * 1975-02-13 1976-05-04 Timex Corporation Single switch arrangement for adjusting the time being displayed by a timepiece
USRE31225E (en) * 1975-02-13 1983-05-03 Timex Corporation Single switch arrangement for adjusting the time being displayed by a timepiece
US4150537A (en) * 1975-03-11 1979-04-24 Citizen Watch Company Limited Electronic timepiece and method for testing operation of the same
US4090350A (en) * 1975-05-06 1978-05-23 Citizen Watch Co., Limited Electronic timepiece
US4083175A (en) * 1975-05-14 1978-04-11 Frontier Manufacturing, Inc. Solid state watch with single time and date selector button
US4176516A (en) * 1975-06-13 1979-12-04 Nippon Electric Co., Ltd. Arrangement for putting an electronic timepiece right with minute indication advanced at first
US4084401A (en) * 1975-07-09 1978-04-18 Hughes Aircraft Company Digital watch with two buttons and improved setting and display control
US4078376A (en) * 1975-07-21 1978-03-14 Freeman Alfred B Electronic watch having optical and audible readouts and alarm and stopwatch capabilities
US4141208A (en) * 1976-01-19 1979-02-27 Hughes Aircraft Company Digitally tuned timepiece
US4033108A (en) * 1976-03-02 1977-07-05 Bulova Watch Company, Inc. Automatic cut-off setting system for LED display in a solid-state watch
US4058971A (en) * 1976-04-26 1977-11-22 Hughes Aircraft Company Digital wristwatch and stopwatch
US4199932A (en) * 1977-07-05 1980-04-29 Ebauches Sa Electronic timepiece with mixed time setting
US4258431A (en) * 1977-12-09 1981-03-24 Citizen Watch Co., Ltd. Electronic timepiece having an analog display device and a digital display device
US4225847A (en) * 1978-03-16 1980-09-30 Tokyo Shibaura Denki Kabushiki Kaisha Display circuit
US4257117A (en) * 1978-04-11 1981-03-17 Ebauches S.A. Electronic watch with touch-sensitive keys
US4300221A (en) * 1978-07-06 1981-11-10 Kabushiki Kaisha Seikosha Electronic timepiece
US4355381A (en) * 1979-05-23 1982-10-19 Seikosha Co., Ltd. Electronic timepiece with electro-optic display
US4308608A (en) * 1979-07-31 1981-12-29 Toyota Jidosha Kogyo Kabushiki Kaisha Digital electronic timepieces
USD581290S1 (en) * 2008-06-10 2008-11-25 Sandra L Corchado Digital watch with calendar and reminder displays
USD740693S1 (en) * 2013-08-30 2015-10-13 Scott Carmichael Watch

Also Published As

Publication number Publication date
JPS5219979B2 (en)) 1977-05-31
HK3578A (en) 1978-01-27
MY7800063A (en) 1978-12-31
FR2180786B1 (en)) 1977-12-30
DE2319437A1 (de) 1973-10-31
DE2319437B2 (de) 1978-02-23
JPS492578A (en)) 1974-01-10
FR2180786A1 (en)) 1973-11-30
DE2319437C3 (de) 1978-11-02
GB1404514A (en) 1975-08-28

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