GB2077005B - Electronic digital stopwatch - Google Patents
Electronic digital stopwatchInfo
- 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
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>
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)
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)
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 |
-
1980
- 1980-05-20 JP JP6697080A patent/JPS56163477A/en active Pending
-
1981
- 1981-05-19 DE DE3119917A patent/DE3119917C2/en not_active Expired
- 1981-05-20 GB GB8115557A patent/GB2077005B/en not_active Expired
- 1981-05-20 CH CH329481A patent/CH650377GA3/de unknown
Also Published As
Publication number | Publication date |
---|---|
CH650377GA3 (en) | 1985-07-31 |
DE3119917C2 (en) | 1985-06-20 |
GB2077005A (en) | 1981-12-09 |
DE3119917A1 (en) | 1982-03-18 |
JPS56163477A (en) | 1981-12-16 |
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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 |