US3757509A - Chronograph timepiece using digital display - Google Patents

Chronograph timepiece using digital display Download PDF

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Publication number
US3757509A
US3757509A US00232468A US3757509DA US3757509A US 3757509 A US3757509 A US 3757509A US 00232468 A US00232468 A US 00232468A US 3757509D A US3757509D A US 3757509DA US 3757509 A US3757509 A US 3757509A
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US
United States
Prior art keywords
signals
digital display
signal
chronograph
resistor
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
US00232468A
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English (en)
Inventor
K Fujita
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.)
Suwa Seikosha KK
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Suwa Seikosha KK
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Filing date
Publication date
Application filed by Suwa Seikosha KK filed Critical Suwa Seikosha KK
Application granted granted Critical
Publication of US3757509A publication Critical patent/US3757509A/en
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F10/00—Apparatus for measuring unknown time intervals by electric means
    • G04F10/04—Apparatus for measuring unknown time intervals by electric means by counting pulses or half-cycles of an ac
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/08—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques
    • G04G9/087—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques provided with means for displaying at will a time indication or a date or a part thereof

Definitions

  • the invention relates to an electronic watch in which digital display is effected by a liquid crystal or light emitting diode and particularly to a display means for an electronic watch having a chronograph mechanism.
  • An object of the invention is to provide a watch of the above character having a simplified display panel.
  • Another object of the invention is to provide a display device having a plurality of digits utilized to indicate the time of day and a time interval.
  • the time of day is a value which is displayed to indicate the present time on the watch, and the time interval refers to an elapsed period from a starting point to a finish point, a cycle time, a required time etc.
  • the surface of a wrist watch is very small, and hence it is difficult to display all of the necessary information, i.e., month, date, hour, minute, second, tenths of seconds, and hundreths of seconds.
  • the month and date are displayed first, the hour and minute are displayed second, and lastly those of tenths and hundreths seconds are displayed.
  • all of the data can be displayed by a unitary displaying device.
  • block 1 is a counter for producing a signal of 100 Hz.
  • the timepiece comprises a quartz crystal oscillator which produces a time standard signal, said standard signal being divided to produce signal 0, of 100 Hz.
  • Counter 2 produces 0.01 sec, 0.1 sec and 1 sec 0 signals by two decimal counters, said 0.01 sec and 0.1 sec signals are coded in B (1, 2, 4, 8).
  • signal B of one second and seconds and one minute signal 0 are produced by both decimal counters and a divide-by-six counter.
  • Block 10 is a select gate for selecting either time signal (B,.B,.B .B,) or a time period signal (A,.A,.
  • Block 11 is a resistor circuit composed of flip-flop circuits in which 5 selected signals C,, Cg, C, and C are shifted in parallel by a clock pulse CL and are memorized.
  • the shift pulse CL is produced by signal 0, of the counter 1 through NOR gate G. At this time, a starting switch S, for aetivating a memory operation is closed, the shift pulse is cut off and memorizing data is stored.
  • Block 12 is a select gate block for selecting either C C (time period and minute) or C C (second and 0.1, 0.01 seconds) by closing or opening a select switch S Output signals D and D of selected coded signal (1, 4, 2, 3) are decoded into seven-segment type signals by decoder 13 and display panel 14 is energized.
  • the time measured by a watch mechanism having eight digits and a time period measured by a chronograph mechanism can be displayed by only four digits. Due to the operation of the memory circuit, a certain time can be displayed statically and exactly.
  • the circuit is complicated, it can be made into a watch size by incorporating the technique of integrated circuits. Particularly, if the circuit is comprised of complementary field effect-transistors (C-MOS), the consumption of electric power becomes very small.
  • C-MOS complementary field effect-transistors
  • An electronic chronograph timepiece comprising digital display means, a watch mechanism for producing signals representing time of day, a chronograph mechanism for producing signals representative of a time period, a first divider circuit for said watch mechanism, a second divider circuit for said chronograph mechanism, resistor memory means for momentarily memorizing signals produced by said first or second divider circuit, a gate circuit for controlling the feed of the signal of said first or second divider circuit to said resistor means, and switch means for operating said gate circuit, said digital display means including a digital display device for displaying the signal from said resistor means.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
US00232468A 1971-03-08 1972-03-07 Chronograph timepiece using digital display Expired - Lifetime US3757509A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46011984 1971-03-08

Publications (1)

Publication Number Publication Date
US3757509A true US3757509A (en) 1973-09-11

Family

ID=11792845

Family Applications (1)

Application Number Title Priority Date Filing Date
US00232468A Expired - Lifetime US3757509A (en) 1971-03-08 1972-03-07 Chronograph timepiece using digital display

Country Status (8)

Country Link
US (1) US3757509A (xx)
CH (2) CH341672A4 (xx)
DE (1) DE2210943C3 (xx)
ES (1) ES400477A1 (xx)
FR (1) FR2128720B1 (xx)
GB (1) GB1355161A (xx)
HK (1) HK40976A (xx)
IT (1) IT952097B (xx)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884035A (en) * 1972-10-13 1975-05-20 Suisse Pour 1 Ind Horlogere Ma Chronograph watch
US3932723A (en) * 1973-04-20 1976-01-13 Tokyo Shibaura Electric Co., Ltd. Electronic range with automatic electronic digital timer
US3934400A (en) * 1973-05-11 1976-01-27 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US3950935A (en) * 1972-09-22 1976-04-20 Kabushiki Kaisha Suwa Seikosha Chronograph wristwatch
DE2613414A1 (de) * 1975-04-04 1976-10-21 Timex Corp Armbanduhr
US3992871A (en) * 1972-10-09 1976-11-23 Kabushiki Kaisha Suwa Seikosha Chronograph wristwatch
US4022017A (en) * 1972-10-25 1977-05-10 Motomu Aoki Full electronic car clock with digital display and method of time setting therefor
US4023345A (en) * 1974-11-25 1977-05-17 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US4089156A (en) * 1975-04-22 1978-05-16 Casio Computer Co., Ltd. Stop watch device
US4319350A (en) * 1979-06-01 1982-03-09 Ebauches Electroniques S.A. Electronic watch

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH586423B5 (xx) * 1975-01-10 1977-03-31 Ebauches Sa
JPS6015901B2 (ja) * 1975-05-30 1985-04-22 カシオ計算機株式会社 時間測定装置
JPS5221861A (en) * 1975-08-11 1977-02-18 Seiko Instr & Electronics Ltd Digital liquid-clystal electronic watch
DE2628899C2 (de) * 1976-06-26 1986-02-20 Diehl GmbH & Co, 8500 Nürnberg Elektronische Uhr
JPS5258968A (en) * 1975-11-11 1977-05-14 Seiko Instr & Electronics Ltd Electronic watch
JPS5258972A (en) * 1975-11-11 1977-05-14 Seiko Instr & Electronics Ltd Electronic stopwatch
IT1073981B (it) * 1975-11-17 1985-04-17 Seiko Instr & Electronics Perfezionamento negli orologi elettronici
IT1071140B (it) * 1976-07-26 1985-04-02 Indesit Ricevitore di segnali radiofonici e/o televisivi
DE2822679A1 (de) * 1978-05-24 1979-11-29 Joachim Goepfert Fa Dipl Ing Leuchtende digitale zeitanzeige
IT1108014B (it) * 1978-07-18 1985-12-02 Borletti Spa Dispositivo elettronico utilizzabile come orologio e o come cronometro

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646751A (en) * 1969-12-05 1972-03-07 Detection Sciences Digital timing system
US3662535A (en) * 1969-07-10 1972-05-16 Lear Siegler Inc Aircraft time indicator
US3664116A (en) * 1970-04-06 1972-05-23 Gen Electric Digital clock controlled by voltage level of clock reference signal
US3686880A (en) * 1970-09-04 1972-08-29 Toshihide Samejima Electronically controlled stop watch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE165932C (xx) *
CH367449A (de) * 1961-02-01 1962-09-28 Omega Brandt & Freres Sa Louis Verfahren zur Anzeige von Zeiten aus verschiedenen Zeitintervallen und Anzeigevorrichtung zur Durchführung dieses Verfahrens
CH1342362A4 (xx) * 1962-11-16 1968-02-15
US3328954A (en) * 1965-04-22 1967-07-04 Mendell E Miller Electronic digital readout time indicating device
DE1673793C3 (de) * 1967-03-23 1981-03-19 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Verfahren zur laufenden Übermittlung der Uhrzeit
US3576099A (en) * 1969-04-22 1971-04-27 Hamilton Watch Co Solid state timepiece having electro-optical time display

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662535A (en) * 1969-07-10 1972-05-16 Lear Siegler Inc Aircraft time indicator
US3646751A (en) * 1969-12-05 1972-03-07 Detection Sciences Digital timing system
US3664116A (en) * 1970-04-06 1972-05-23 Gen Electric Digital clock controlled by voltage level of clock reference signal
US3686880A (en) * 1970-09-04 1972-08-29 Toshihide Samejima Electronically controlled stop watch

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950935A (en) * 1972-09-22 1976-04-20 Kabushiki Kaisha Suwa Seikosha Chronograph wristwatch
US3992871A (en) * 1972-10-09 1976-11-23 Kabushiki Kaisha Suwa Seikosha Chronograph wristwatch
US4287585A (en) * 1972-10-09 1981-09-01 Kabushiki Kaisha Suwa Seikosha Chronograph wristwatch
US3884035A (en) * 1972-10-13 1975-05-20 Suisse Pour 1 Ind Horlogere Ma Chronograph watch
US4022017A (en) * 1972-10-25 1977-05-10 Motomu Aoki Full electronic car clock with digital display and method of time setting therefor
US3932723A (en) * 1973-04-20 1976-01-13 Tokyo Shibaura Electric Co., Ltd. Electronic range with automatic electronic digital timer
US3934400A (en) * 1973-05-11 1976-01-27 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
US4023345A (en) * 1974-11-25 1977-05-17 Kabushiki Kaisha Suwa Seikosha Electronic timepiece
DE2613414A1 (de) * 1975-04-04 1976-10-21 Timex Corp Armbanduhr
US4022014A (en) * 1975-04-04 1977-05-10 Timex Corporation Combination wristwatch/chronograph/wrist calculator/measuring device
US4089156A (en) * 1975-04-22 1978-05-16 Casio Computer Co., Ltd. Stop watch device
US4319350A (en) * 1979-06-01 1982-03-09 Ebauches Electroniques S.A. Electronic watch

Also Published As

Publication number Publication date
DE2210943B2 (de) 1974-09-19
CH341672A4 (xx) 1976-02-27
CH619825B5 (xx) 1980-10-31
GB1355161A (en) 1974-06-05
ES400477A1 (es) 1975-05-01
FR2128720B1 (xx) 1976-08-06
DE2210943C3 (de) 1984-12-20
FR2128720A1 (xx) 1972-10-20
IT952097B (it) 1973-07-20
HK40976A (en) 1976-07-09
DE2210943A1 (de) 1972-10-05

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