US3928959A - Electronic timepiece - Google Patents

Electronic timepiece Download PDF

Info

Publication number
US3928959A
US3928959A US432721A US43272174A US3928959A US 3928959 A US3928959 A US 3928959A US 432721 A US432721 A US 432721A US 43272174 A US43272174 A US 43272174A US 3928959 A US3928959 A US 3928959A
Authority
US
United States
Prior art keywords
signal
correction
digit
stage
switch
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
US432721A
Other languages
English (en)
Inventor
Okito Naito
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.)
Seikosha KK
Original Assignee
Seikosha KK
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 Seikosha KK filed Critical Seikosha KK
Application granted granted Critical
Publication of US3928959A publication Critical patent/US3928959A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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

Definitions

  • a manually Pemed switch is electronic divider circuit which supplies the timekeep- 52 us.
  • This invention relates generally to small-sized electronic timepieces having digital displays and especially to an electronic wristwatch having a correction circuit which is adapted to provide two manners of correcting a single digit utilizing a single switch.
  • Correction circuits in electronic timepieces wherein each digit is displayed such as hours, minutes and seconds and wherein each digit can be independently corrected are well known.
  • each digit is indexed by one to thereby change the time by separately correcting hour, minute or second digits.
  • Still another type of correction mechanism in digital display electronic timepieces is to provide a high frequency signal to the divider circuit and advance each digit at a multiple of its normal advancement rate.
  • Another correction method involves the correction of all digits except seconds, the seconds digits being set to zero by a correction switch and restarted when the switch is released at a reference time.
  • Each of the above mentioned methods of correction while providing certain advantages is less than completely satisfactory. For example, in an electronic timepiece wherein each digit is independently corrected by indexing same by one, if a minute is incorrect it might be necessary to index the minute digit 59 times to obtain a corrected value. Similarly when the quick-feed operation is utilized errors in setting frequently occur due to the speed of indexing. Accordingly, it is desired to provide an electronic timepiece having a digital display which eliminates the above-mentioned disadvantages.
  • an electronic wristwatch having an oscillator for producing a high frequency time standard signal, an electronic divider circuit for receiving the high frequency time standard signal and providing low frequency timing signals, a digital display for displaying time in response to such low frequency timing signals.
  • At least one manually operated correcting switch associated with at least one digit of time displayed is coupled through a correcting circuit to an electronic divider circuit stage corresponding to the digit to be corrected.
  • the correcting circuit is further adapted to receive the output signal of a divider stage of a higher frequency than the frequency of the divider stage to be corrected. Displacement of said correction switch indexes said corresponding divider stage to correct the digit corresponding thereto by one.
  • Sustained displacement of the correcting switch for a certain period of time effects a quick-feed correction of the digit by applying the high frequency signal applied to the correcting circuit to the divider stage corresponding to the digit to be corrected.
  • Another object of this invention is to provide an improved digital display electronic timepiece wherein the same swtich is used to correct the time displayed by indexing same and/or quick-feeding signals thereto.
  • Still another object of this invention is to provide an improved electronic wristwatch having a digital display wherein correction of a digit is effected in a highly practical manner.
  • FIG. 1 is a circuit diagram of an electronic wristwatch including the improved correction switch and circuit corresponding thereto constructed in accordance with the instant invention
  • FIG. 2 is a timing diagram of the correction signal applied by the correcting circuit depicted in FIG. 1;
  • FIG. 3 is a circuit diagram of one embodiment of the correction circuit depicted in FIG. I.
  • FIG. 4 is a timing diagram of the signals produced by the control circuit depicted in FIG. 3.
  • FIG. I an electronic timepiece having a conventional digital display 2 for displaying numerals representative of hours, minutes and seconds is depicted.
  • Each digit of the display may, by way of example, take the form of a seven bar display.
  • An oscillating circuit 1 which includes a quartz crystal vibrator, is coupled to an electronic divider circuit 3 for applying high frequency time standard signals thereto.
  • the electronic divider circuit 3 consists of a multi-stage divider chain capable of counting seconds, minutes and hours and producing, as an output, timing signals representative of present time as reflected by the count in the respective divider stages.
  • the electronic divider circuit includes suitable decoder and driving circuits so that the timing signals are capable of driving display 2.
  • the output of the electronic dividing and driving circuit 3 is applied to digital display 2 which provides a digital display of time.
  • a correcting circuit 7 consisting of a logic switching circuit depicted in FIG. 3 is capable of being actuated by manually operated switch 5 coupled thereto and is coupled to the divider stage which counts minutes.
  • the correcting circuit is further coupled to another stage of the dividing and driving circuit 3 to receive a signal having a higher frequency, 8 Hz, than the minute signal.
  • Manually operated correction switches 4, 5 and 6, provided for the correction of hours, minutes and seconds respectively are two position switches which are spring biased to be open in normal operation.
  • the common terminal of hour correction switch 4 and second correction switch 6 are coupled to the respective divider stages for counting such digits.
  • Minute correction switch 5 is coupled through correction circuit 7 which couples said minute correcting switch 5 to the minute divider in the manner hereinabove described.
  • Correction of hours, minutes and seconds may be achieved by indexing the count of the associated divider stages by one upon a closing of the manually operated switches 4, 5 and 6. Further, if switch 5 is maintained in a closed position for more than 2 seconds, the correcting circuit applies the 8 Hz signal from the higher frequency stageto the minute divider stage in order to rapidly advance same. Thus, the correcting circuit 7 is changed over to apply an 8 Hz signal and the minute digit is more rapidly indexed until the correct digit is displayed, at which time the switch 5 would be opened to thereby terminate correction of the digit. It is appreciated that when the minutes display is incorrect by a few minutes it is only necessary to index same by rapidly deflecting switch 5 to thereby effect correction.
  • FIG. 3 Depicted in FIG. 3 is an electronic circuit which is adapted to control a time correcting input such as would be utilized in correcting circuit 7 depicted in FIG. 1.
  • a four stage flip-flop which is adapted to divide a signal by 24, supplies an output signal thereof to a D-type flip-flop which has a memory cycle of 2 seconds, which in turn applies output signals to AND gates a and 10b which have common outputs to a NOR gate to provide a gating circuit.
  • a microswitch input for minutes correction is applied to the reset terminal of the four stage flip-flop and is further supplied to the reset terminal of the D-flip-flop as well as to one input of AND gate 10b.
  • the 8 Hz output besides being applied as the input to the four stage flip-flop is further applied to AND gate 10a and is gated by the D-type flip-flop.
  • the wave-forms of the circuit are illustrated in FIG. 4.
  • An electronic timepiece having a multi-digital display and comprising oscillator means for generating a relatively high frequency time standard signal; an electronic divider means having a plurality of stages coupled to said oscillator means and adapted to supply low frequency signals to said digital display that are representative of present time in response to said high frequency time standard signal, an intermediate stage of said divider means producing an intermediate frequency correction signal, correction circuit means for receiving said intermediate frequency correction signal from said intermediate stage of said electronic divider means, means for producing an index correction signal including one manually operated correction switch coupled to said correction circuit means, said correction means applying said index correction signal to a second divider stage associated with at least one displayed digit of time to be corrected to index the count of said stage by one when said switch is maintained in an operative position for less than a predetermined interval, and to apply said intermediate frequency correction signal to said second divider stage when said switch is maintained in said position in excess of said interval to repetitively index said digit.
  • said index correction signal producing means including at least one further correction switch coupled to a third stage of said electronic divider means for correcting the count of said third stage and hence the one digit associated therewith by indexing said stage by one.
  • said correcting circuit means includes a multistage flip-flop for providing an interval signal which determines said interval in response to a time coincident application of said intermediate frequency correction signal and said switching signal, and gating circuit means having applied thereto said interval signal, said intermediate frequency correction signal and said switching signal, said gating means being adapted to provide to said digit to be corrected said intermediate frequency correcting signal in response to the time coincident application of said interval determining signal and said intermediate frequency correction signal and being further adapted to provide said index correction signal being applied in the absence of said interval signal at the input of said gating circuit means.
  • said gating circuit means includes a flip-flop for providing a first and second complementary output signal in response to the time coincidental application of said switching signal and said interval signal, output gate means for supplying said digit correction signal to said digit to be corrected, the correction signals applied thereto being inverted thereby, and first and second gating means adapted to receive said first and second complementary output signals respectively as a first input, said first gating means being adapted to receive as a second input said intermediate frequency correction signal and upon coincidence in the state of said signals applied thereto applies said intermediate frequency correction signal to said output gate means and said gating means having as its other input said switching signal and upon coincidence in state passing said index correcting signal to said output gating means.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
US432721A 1973-01-12 1974-01-11 Electronic timepiece Expired - Lifetime US3928959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP591173A JPS5441349B2 (no) 1973-01-12 1973-01-12

Publications (1)

Publication Number Publication Date
US3928959A true US3928959A (en) 1975-12-30

Family

ID=11624068

Family Applications (1)

Application Number Title Priority Date Filing Date
US432721A Expired - Lifetime US3928959A (en) 1973-01-12 1974-01-11 Electronic timepiece

Country Status (5)

Country Link
US (1) US3928959A (no)
JP (1) JPS5441349B2 (no)
GB (1) GB1429601A (no)
HK (1) HK4978A (no)
MY (1) MY7800080A (no)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033109A (en) * 1974-11-21 1977-07-05 Tokyo Shibaura Electric Co., Ltd. Time correction circuits for electronic timepieces
US4092822A (en) * 1974-12-11 1978-06-06 Ebauches Sa Control device for an electronic wrist-watch
US4107915A (en) * 1972-12-28 1978-08-22 Citizen Watch Co., Ltd Electronic timepiece
US4141208A (en) * 1976-01-19 1979-02-27 Hughes Aircraft Company Digitally tuned timepiece
US4185453A (en) * 1976-10-25 1980-01-29 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Time setting and correcting circuit for electronic timepieces
FR2431723A1 (fr) * 1978-07-19 1980-02-15 Seiko Instr & Electronics Montre electronique
US4209975A (en) * 1977-05-11 1980-07-01 Kabushiki Kaisha Seikosha Time adjusting means for electronic timepiece
US4211067A (en) * 1977-04-22 1980-07-08 Kabushiki Kaisha Seikosha Time adjusting device for electronic timepiece
US4232384A (en) * 1976-02-23 1980-11-04 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Timesetting arrangement for electrical timepieces
US4261048A (en) * 1975-12-25 1981-04-07 Citizen Watch Company Limited Analog quartz timepiece
US4262351A (en) * 1974-10-31 1981-04-14 Citizen Watch Company Limited Electronic timepiece
US4280213A (en) * 1978-11-17 1981-07-21 Fujitsu Limited Quick feeding system for a counter
FR2481477A1 (fr) * 1980-04-28 1981-10-30 Otis Eng Co Dispositif pour faire alterner periodiquement le fonctionnement d'un appareil entre deux etats
US4308607A (en) * 1978-04-22 1981-12-29 Citizen Watch Company Limited Electronic timepiece
US4357693A (en) * 1980-06-20 1982-11-02 Timex Corporation Electronic hour timesetting device for electronic analog timepiece
FR2575012A1 (fr) * 1984-12-14 1986-06-20 Electricite De France Appareil de commande et de comptage de commutations

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS503377A (no) * 1973-05-11 1975-01-14
JPS5030559A (no) * 1974-07-09 1975-03-26
JPS5159673A (en) * 1974-11-21 1976-05-24 Tokyo Shibaura Electric Co Denshitokeino jikokusetsuteihoshiki
JPS5159672A (no) * 1974-11-21 1976-05-24 Tokyo Shibaura Electric Co
JPS5747434B2 (no) * 1975-01-31 1982-10-08
JPS51101577A (ja) * 1975-03-04 1976-09-08 Seiko Instr & Electronics Denshidokeisochinoshuseisochi
JPS51102681A (no) * 1975-04-23 1976-09-10 Citizen Watch Co Ltd
DE2660839C2 (de) * 1975-06-04 1985-08-14 Canon K.K., Tokio/Tokyo Informationseingabesystem für eine Kamera
DE2660840C2 (de) * 1975-06-04 1985-08-08 Canon K.K., Tokio/Tokyo Informationseingabesystem für eine Kamera
JPS51143327A (en) * 1975-06-04 1976-12-09 Canon Inc Photographing data indication system
JPS51146863A (en) * 1975-06-11 1976-12-16 Sharp Corp Time setting device for electronic timepieces
JPS51150368A (en) * 1975-06-18 1976-12-23 Citizen Watch Co Ltd Electronic watch
JPS5276967A (en) * 1975-12-23 1977-06-28 Sanyo Electric Co Ltd Display correcting device for electronic watches
JPS52113262A (en) * 1976-03-19 1977-09-22 Citizen Watch Co Ltd Correction method for electronic watch
DE2726383C2 (de) * 1977-06-10 1985-07-18 Diehl GmbH & Co, 8500 Nürnberg Elektromechanische Stelleinrichtung für eine elektronische Digitalanzeige
JPS5824232Y2 (ja) * 1977-06-27 1983-05-24 セイコーインスツルメンツ株式会社 時刻修正装置
JPS5442178A (en) * 1978-08-16 1979-04-03 Citizen Watch Co Ltd Electronic watch
JPS5523487A (en) * 1979-03-12 1980-02-19 Citizen Watch Co Ltd Corrector of electronic watch
JPS5523488A (en) * 1979-03-12 1980-02-19 Citizen Watch Co Ltd Corrector of electronic watch
JPS55158589A (en) * 1979-05-29 1980-12-10 Sanyo Electric Co Ltd Time correcting method for electronic clock
JPS5580794U (no) * 1979-10-31 1980-06-03
CH641630B (fr) 1980-03-14 Centre Electron Horloger Dispositif d'entree de donnees.
JPS5670594U (no) * 1980-10-16 1981-06-10
JPS56148690U (no) * 1981-03-18 1981-11-09
JPS61159666A (ja) * 1985-10-21 1986-07-19 Minolta Camera Co Ltd 複写機
JPH0632636Y2 (ja) * 1988-04-15 1994-08-24 三菱重工業株式会社 時刻設定器

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
US3699763A (en) * 1971-07-06 1972-10-24 Us Navy 24-hour digital clock
US3733803A (en) * 1971-06-23 1973-05-22 Citizen Watch Co Ltd Device for correcting time displayed on electronic timepiece
US3756011A (en) * 1971-09-13 1973-09-04 Suwa Seikosha Kk Time correcting device for electronic timepieces

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194003A (en) * 1963-11-13 1965-07-13 Vogel And Company P Solid state electronic timepiece
US3672155A (en) * 1970-05-06 1972-06-27 Hamilton Watch Co Solid state watch
JPS5242068B2 (no) * 1972-04-01 1977-10-21
JPS522259A (en) * 1975-06-24 1977-01-08 Yokogawa Hokushin Electric Corp Lamp voltage generating circuit

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
US3733803A (en) * 1971-06-23 1973-05-22 Citizen Watch Co Ltd Device for correcting time displayed on electronic timepiece
US3699763A (en) * 1971-07-06 1972-10-24 Us Navy 24-hour digital clock
US3756011A (en) * 1971-09-13 1973-09-04 Suwa Seikosha Kk Time correcting device for electronic timepieces

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4107915A (en) * 1972-12-28 1978-08-22 Citizen Watch Co., Ltd Electronic timepiece
US4262351A (en) * 1974-10-31 1981-04-14 Citizen Watch Company Limited Electronic timepiece
US4033109A (en) * 1974-11-21 1977-07-05 Tokyo Shibaura Electric Co., Ltd. Time correction circuits for electronic timepieces
US4092822A (en) * 1974-12-11 1978-06-06 Ebauches Sa Control device for an electronic wrist-watch
US4261048A (en) * 1975-12-25 1981-04-07 Citizen Watch Company Limited Analog quartz timepiece
US4141208A (en) * 1976-01-19 1979-02-27 Hughes Aircraft Company Digitally tuned timepiece
US4232384A (en) * 1976-02-23 1980-11-04 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Timesetting arrangement for electrical timepieces
US4185453A (en) * 1976-10-25 1980-01-29 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Time setting and correcting circuit for electronic timepieces
US4211067A (en) * 1977-04-22 1980-07-08 Kabushiki Kaisha Seikosha Time adjusting device for electronic timepiece
US4209975A (en) * 1977-05-11 1980-07-01 Kabushiki Kaisha Seikosha Time adjusting means for electronic timepiece
US4308607A (en) * 1978-04-22 1981-12-29 Citizen Watch Company Limited Electronic timepiece
FR2431723A1 (fr) * 1978-07-19 1980-02-15 Seiko Instr & Electronics Montre electronique
US4275463A (en) * 1978-07-19 1981-06-23 Kabushiki Kaisha Daini Seikosha Electronic timepiece
US4280213A (en) * 1978-11-17 1981-07-21 Fujitsu Limited Quick feeding system for a counter
FR2481477A1 (fr) * 1980-04-28 1981-10-30 Otis Eng Co Dispositif pour faire alterner periodiquement le fonctionnement d'un appareil entre deux etats
US4357693A (en) * 1980-06-20 1982-11-02 Timex Corporation Electronic hour timesetting device for electronic analog timepiece
FR2575012A1 (fr) * 1984-12-14 1986-06-20 Electricite De France Appareil de commande et de comptage de commutations

Also Published As

Publication number Publication date
JPS5441349B2 (no) 1979-12-07
GB1429601A (en) 1976-03-24
HK4978A (en) 1978-01-27
MY7800080A (en) 1978-12-31
JPS4995657A (no) 1974-09-11

Similar Documents

Publication Publication Date Title
US3928959A (en) Electronic timepiece
US3889460A (en) Method and apparatus for correcting time in an electronic wristwatch
US4030283A (en) Electrically driven time piece with means for effecting a precise setting of time
US3762152A (en) Reset system for digital electronic timepiece
US3914931A (en) Electronic timepiece
GB1354231A (en) Electronically controlled time-keeping device
US4147021A (en) Electronic watch having an alarm means
US3922844A (en) Electronic timepiece
US3975897A (en) Electronic display digital wristwatch
US4185453A (en) Time setting and correcting circuit for electronic timepieces
GB1470135A (en) Electronic timepiece
GB1399443A (en) Clock devices
US3953963A (en) Electronic digital display timepiece correction device
US3795098A (en) Time correction device for digital indication electronic watch
US3756011A (en) Time correcting device for electronic timepieces
US4089159A (en) Electronic timepiece
US4236238A (en) Electronic digital timepiece having a stopwatch function and a timer function
US4110966A (en) Electronic timepiece with stop watch
JPS6015901B2 (ja) 時間測定装置
US3717990A (en) Time correction device for digital watches
US3942318A (en) Time correction device for digital indication electronic watch
US3955352A (en) Electronic watch with digital display having a correction mechanism for small errors
GB1480548A (en) Electronic timepieces
US4102122A (en) Electronic watch
US3934400A (en) Electronic timepiece