GB2077005B - Electronic digital stopwatch - Google Patents

Electronic digital stopwatch

Info

Publication number
GB2077005B
GB2077005B GB8115557A GB8115557A GB2077005B GB 2077005 B GB2077005 B GB 2077005B GB 8115557 A GB8115557 A GB 8115557A GB 8115557 A GB8115557 A GB 8115557A GB 2077005 B GB2077005 B GB 2077005B
Authority
GB
United Kingdom
Prior art keywords
switch
time
ram
lap
operated
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
Application number
GB8115557A
Other versions
GB2077005A (en
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of GB2077005A publication Critical patent/GB2077005A/en
Application granted granted Critical
Publication of GB2077005B publication Critical patent/GB2077005B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G99/00—Subject matter not provided for in other groups of this subclass
    • G04G99/006—Electronic time-pieces using a microcomputer, e.g. for multi-function clocks
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F10/00—Apparatus for measuring unknown time intervals by electric means
    • 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
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
    • G07C1/22—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people in connection with sports or games

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electric Clocks (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

An electronic digital stopwatch comprises a plurality of switches (SW1 to SW5) (Fig. 3), a switch decoder circuit (15), a ROM (16) (Fig. 2) for memorizing microprograms of operating instructions, a RAM (18) having a plurality of memory locations to memorize time data from a time measurement circuit including counters C11 to C14 & CPU19 for measuring time on the basis of a reference frequency signal, also for memorizing lap times & number of lap measurements. When a first switch is operated, a microprogram instruction corresponding to the first switch is read out, from ROM16, whereby the time measurement circuit 15 caused to start time measurement. When the second switch is operated, a microprogram instruction corresponding to the second switch is read out, whereby the time information at the time of operation of this switch eg lap time is stored in one memory area of the RAM. When the second switch is operated again, the time information at this time is stored in another memory area of the RAM. <IMAGE>
GB8115557A 1980-05-20 1981-05-20 Electronic digital stopwatch Expired GB2077005B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6697080A JPS56163477A (en) 1980-05-20 1980-05-20 Digital stopwatch

Publications (2)

Publication Number Publication Date
GB2077005A GB2077005A (en) 1981-12-09
GB2077005B true GB2077005B (en) 1983-12-07

Family

ID=13331381

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8115557A Expired GB2077005B (en) 1980-05-20 1981-05-20 Electronic digital stopwatch

Country Status (4)

Country Link
JP (1) JPS56163477A (en)
CH (1) CH650377GA3 (en)
DE (1) DE3119917C2 (en)
GB (1) GB2077005B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882564A (en) * 1981-11-12 1983-05-18 Fuji Xerox Co Ltd Amorphous silicon photo receiving element
US4493043A (en) * 1981-11-25 1985-01-08 Forbath Frank P Medical timing system for use during pregnancy and method of using same
DE3303662A1 (en) * 1983-02-03 1984-08-09 Siemens AG, 1000 Berlin und 8000 München HIGH RESOLUTION TIMER
BE1007408A3 (en) * 1993-08-13 1995-06-06 Winters Joep Method and device for checking medicine intake
JP2006320403A (en) * 2005-05-17 2006-11-30 Daikoku Denki Co Ltd Winning device for pachinko game machine and pachinko game machine
CN104880939A (en) * 2014-02-28 2015-09-02 上海中核维思仪器仪表有限公司 Gate circuit delay counter supersonic wave propagation time high-precision measuring method based on CPLD
CN104536282A (en) * 2014-12-30 2015-04-22 杭州士兰微电子股份有限公司 Time-digital converter and time measuring device and method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1416880A (en) * 1972-01-06 1975-12-10 Omf California Inc Apparatus for determining and temporarily recording the time at which an event occurs
US4035627A (en) * 1973-05-29 1977-07-12 Hewlett-Packard Company Scientific calculator
US4063409A (en) * 1976-01-05 1977-12-20 Intel Corporation Custom watch
US4142680A (en) * 1977-03-21 1979-03-06 Oswald Robert A High resolution timing recording system
JPS54109872A (en) * 1978-02-17 1979-08-28 Hitachi Ltd Pla system of electronic type multifunction watch
GB2015208B (en) * 1978-02-27 1982-09-02 Rockwell International Corp Data monitoring and recording system incorporating a real time clock using computer means
US4223525A (en) * 1978-10-11 1980-09-23 Societe Suisse Pour L'industrie Horlogere Management Services, S.A. Sequential display for digital chronograph
JPS5595892A (en) * 1979-01-17 1980-07-21 Hitachi Ltd Electronic digital multi-function watch

Also Published As

Publication number Publication date
CH650377GA3 (en) 1985-07-31
DE3119917A1 (en) 1982-03-18
JPS56163477A (en) 1981-12-16
GB2077005A (en) 1981-12-09
DE3119917C2 (en) 1985-06-20

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980520