GB1355936A - Electronic timepieces - Google Patents
Electronic timepiecesInfo
- Publication number
- GB1355936A GB1355936A GB557872A GB557872A GB1355936A GB 1355936 A GB1355936 A GB 1355936A GB 557872 A GB557872 A GB 557872A GB 557872 A GB557872 A GB 557872A GB 1355936 A GB1355936 A GB 1355936A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sec
- time
- divider
- display
- counters
- 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
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
1355936 Electronic timepieces SUWA SEIKOSHA KK 7 Feb 1972 [18 Feb 1971] 5578/72 Heading G3T An electronic timepiece with digital display (e.g. liquid crystal or light emitting means) functions both to indicate the time of day and as a stop watch to indicate a time interval t 2 -t 1 . A time standard pulse generator 1 Fig.1 (e.g. quartz crystal, tuning fork or atomic particle) output is frequency divided at 2, 3, the divider 3 dividing down to signals at the smallest time interval to be displayed e.g. seconds and the divider 2 having an output f 1 of several KHz if the time display is to read down to 1/1000 sec (for stop watch operation). TIME OF DAY INDICATING. 1Hz pulses from divider 3 are fed to counters 4 to 9 which produce respective outputs for the control of the secs, tens of secs, mins, tens of mins, hours, tens of hours display indication. For a 24 hour clock the counter 9 would be a 1/3 divider circuit for indicating 0, 1 and 2 in the tens column of the hours display. With a switch WC in the 'W' position, AND gates 20 are opened to pass the contents of counters 4 to 9 to OR gates 22 and thence to signal distributors 23 to 28 to supply operating signals to appropriate elements of seven-element numeric display devices 29-34, to indicate time of day. TIME INTERVAL INDICATING (STOP WATCH). The output f 1 of divider 2 is fed to a divider 10 which divides f 1 into signals of for example 1/10 sec or 1/100 sec or 1/1000 sec period depending upon degree of precision required. The output of 10 (say at 1/100 sec period) is fed to counters 11 to 16 which produce respectively outputs for the control of 1/100 sec, 1/10 sec, 1 sec, 10 secs, 1 min, 10 mins. Switch WC is moved to the 'C' position so that the AND gates 20 are closed and AND gates 21 opened. A reset button (not shown) is pressed and a reset signal at R resets divider 10 and counters 11-16 to zero and the display will indicate zero. To start timing a push switch (not shown) connected at S is pressed at instant t 1 and a flip-flop 17 changes state so that divider 10 commences to transmit 1/100 sec signals and counters 11-16 commence counting and produce on the display the appropriate count. When the switch at S is pressed a second time at an instant t 2 the flip-flop 17 is reset, the divider 10 stops and likewise the counters 11-16, and a time interval t 2 -t 1 will be displayed on the same time display devices as were used for time of day indication. If the time interval range to be measured is wide e.g. 1/100 sec to 1 hour, a separate display array may be provided. An arrangement whereby more than one time interval at a time can be measured by one timepiece, is described with reference to Fig. 2 (not shown). Dividers, logic circuits &c. may be M.O.S. integrated circuits.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP715871 | 1971-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1355936A true GB1355936A (en) | 1974-06-12 |
Family
ID=11658249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB557872A Expired GB1355936A (en) | 1971-02-18 | 1972-02-07 | Electronic timepieces |
Country Status (3)
Country | Link |
---|---|
US (1) | US3795099A (en) |
GB (1) | GB1355936A (en) |
HK (1) | HK41076A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2444452A1 (en) * | 1978-12-19 | 1980-07-18 | Tatabanyai Szenbanyak | DEVICE FOR MEASURING THE PSYCHIC REACTION TIME |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3969886A (en) * | 1971-06-30 | 1976-07-20 | Kabushiki Kaisha Daini Seikosha | Digital electronic watch for displaying both time and the time remaining within a preselected time period |
US4376993A (en) * | 1972-04-24 | 1983-03-15 | Freeman Alfred B | Electronic watch with sequential readout and control |
JPS4953476A (en) * | 1972-09-22 | 1974-05-24 | ||
JPS4960264A (en) * | 1972-10-09 | 1974-06-11 | ||
JPS503376A (en) * | 1973-05-11 | 1975-01-14 | ||
USRE32861E (en) * | 1973-07-20 | 1989-02-07 | Cem Corporation | Automatic volatility computer |
JPS5749876B2 (en) * | 1973-09-19 | 1982-10-25 | ||
JPS6045383B2 (en) * | 1974-11-25 | 1985-10-09 | セイコーエプソン株式会社 | electronic watch body |
US4196582A (en) * | 1975-01-06 | 1980-04-08 | Ebauches S.A. | Control device for an electronic watch |
CH118575A4 (en) * | 1975-01-31 | 1977-06-30 | ||
US3961473A (en) * | 1975-03-06 | 1976-06-08 | George Hung | Electronic chess timer |
US4022014A (en) * | 1975-04-04 | 1977-05-10 | Timex Corporation | Combination wristwatch/chronograph/wrist calculator/measuring device |
JPS52106768A (en) * | 1975-04-22 | 1977-09-07 | Casio Comput Co Ltd | Stopwatch |
US4184320A (en) * | 1975-05-30 | 1980-01-22 | Casio Computer Co., Ltd. | Electronic stop watches |
JPS5247767A (en) * | 1975-10-14 | 1977-04-15 | Seiko Instr & Electronics Ltd | Digital alarm watch |
JPS593717B2 (en) * | 1975-11-11 | 1984-01-25 | セイコーインスツルメンツ株式会社 | densid cay |
US4110966A (en) * | 1975-12-26 | 1978-09-05 | Casio Computer Co., Ltd. | Electronic timepiece with stop watch |
JPS52141671A (en) * | 1976-05-20 | 1977-11-26 | Sharp Corp | Digital display electronic watch with stop watch |
US4338680A (en) * | 1976-09-28 | 1982-07-06 | Citizen Watch Co. Ltd. | Electronic timepiece |
JPS5395076A (en) * | 1977-01-31 | 1978-08-19 | Toshiba Corp | Electronic watch |
US4168623A (en) * | 1977-02-07 | 1979-09-25 | Philip Morris Incorporated | Method for determining volatile content of a sample |
CH621671B (en) * | 1977-06-03 | Ebauches Electroniques Sa | ELECTRONIC WATCH FOR THE YACHTING COMPETITION. | |
US4201041A (en) * | 1977-08-05 | 1980-05-06 | Jeco Company Limited | Digital electronic timepiece having a time correcting means |
US4211066A (en) * | 1978-09-29 | 1980-07-08 | Kabushiki Kaisha Daini Seikosha | Stop watch |
US4935737A (en) * | 1986-11-05 | 1990-06-19 | Bull Hn Information Systems Inc. | Data selection matrix |
DE3731956A1 (en) * | 1987-09-23 | 1989-04-06 | Junghans Uhren Gmbh | AUTONOMOUS RADIO WATCH |
DE8815765U1 (en) * | 1988-12-20 | 1990-04-26 | Junghans Uhren GmbH, 7230 Schramberg | Autonomous radio clock |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2970226A (en) * | 1956-11-20 | 1961-01-31 | Texas Instruments Inc | Electronic timing device |
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 |
US3672155A (en) * | 1970-05-06 | 1972-06-27 | Hamilton Watch Co | Solid state watch |
-
1972
- 1972-02-04 US US00223665A patent/US3795099A/en not_active Expired - Lifetime
- 1972-02-07 GB GB557872A patent/GB1355936A/en not_active Expired
-
1976
- 1976-06-30 HK HK410/76*UA patent/HK41076A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2444452A1 (en) * | 1978-12-19 | 1980-07-18 | Tatabanyai Szenbanyak | DEVICE FOR MEASURING THE PSYCHIC REACTION TIME |
Also Published As
Publication number | Publication date |
---|---|
US3795099A (en) | 1974-03-05 |
HK41076A (en) | 1976-07-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PE20 | Patent expired after termination of 20 years |