US3855780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic clock device
Assignee: Casio Computer Co Ltd
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Filing: 1973-03-15
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Granted: 1974-12-24
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Expires: 1993-03-15
Abstract
Abstract The electronic clock device permits the indication of date on a digital indicator for hour and minute indication through the use of switching means and comprises a 60 step counter for counting minutes which is driven by clock pulses and a 12 step counter for counting hours which is driven by carry signals from the 60 step counter. Hours and minutes are indicated on the digital indicator in accordance with the output signals from those counters. Also included are a date counter driven by carry signals from the 12 step counter and a logic circuit which controls the respective outputs from the date counter and the 60 step counter to produce an output for indicating the date to be displayed on the digital indicator. Through the operation of a date indication button the indicator is switched from the hour or minute indication mode to the date indication mode or vice versa to enable selective indication of both hours on minutes and dates or the same digital indicator.
Inventors
- 👤 T Kashio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:31
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/08; G04G9/087
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
267 words
A digital indication type electronic clock device comprising: a clock pulse generating means generating clock signals of a specified, highly stable frequency; a minute counting means responsive to said clock signals for generating minute signals by counting said clock signals from said clock pulse generating means and for generating a carry signal every 60 minutes; an hour counting means actuated by the carry signals from said minute counting means for generating hour signals and for generating a carry signal every 24 hours; a date counting means actuated by the carry signals from said hour counting means for generating date signals; an hour indication means coupled to the hour counting means for performing digital indication of the counts of the hour counting means; a minute/date indication means capable of optionally indicating on a single indication portion the output counts of the minute counting means and of the date counting means; a manually operated switch means for selectively causing said minute/date indicating means to indicate minutes and/or date; a first group of AND circuits and OR circuits coupled to said minute counting means coupling said AND circuits to said minute date indication means for selectively supplying said minute/date indication means with the minute signalsfrom the minute counting means when said manual switch means is not being operated; and a second group of AND circuits coupled to said manual switch means and coupling said minute/date indication means to the date counting means through said OR circuits for selectively supplying said minute/date indication means with the date signals from the date counting means responsive to operation of said manual switch means.
Claim 2
Dependent Claim
267 words
A digital indication type electronic clock device comprising: a clock pulse generating means generating clock signals of a specified, highly stable frequency; a minute counting means responsive to said clock signals for generating minute signals by counting said clock signals from said clock pulse generating means and for generating a carry signal every 60 minutes; an hour counting means actuated by the carry signals from said minute counting means for generating hour signals and for generating a carry signal every 24 hours; a date counting means actuated by the carry signals from said hour counting means for generating date signals; an hour indication means coupled to the hour counting means for performing digital indication of the counts of the hour counting means; a minute/date indication means capable of optionally indicating on a single indication portion the output counts of the minute counting means and of the date counting means; a manually operated switch means for selectively causing said minute/date indicating means to indicate minutes and/or date; a first group of AND circuits and OR circuits coupled to said minute counting means coupling said AND circuits to said minute date indication means for selectively supplying said minute/date indication means with the minute signalsfrom the minute counting means when said manual switch means is not being operated; and a second group of AND circuits coupled to said manual switch means and coupling said minute/date indication means to the date counting means through said OR circuits for selectively supplying said minute/date indication means with the date signals from the date counting means responsive to operation of said manual switch means.
Claim 3
Dependent Claim
43 words
A digital indication type electronic clock device according to claim 1 wherein said clock generating means includes a source of standard high frequency signals and a dividing means coupled to said source for dividing the standard high frequency signal into said clock signals.
Claim 4
Dependent Claim
94 words
A digital indication type electronic clock device according to claim 1 wherein said manually operated switch means is coupled to said first group of AND circuits so as to enable said first group of AND circuits when said switch means is not operated, and is coupled to said second group of AND circuits for disabling said second group of AND circuits when said switch means is not operated, said switch means disabling said first group of AND circuits when it is operated and enabling said second group of AND circuits when it is operated.
Claim 5
Dependent Claim
267 words
A digital indication type electronic clock device comprising: a clock pulse generating means generating clock signals of a specified highly stable frequency; a minute counting means responsive to said clock signals for generating minute signals by counting said clock signals from said clock pulse generating means and for generating a carry signal every 60 minutes; an hour counting means actuated by the carry signals from said minute counting means for generatiNg hour signals and for generating a carry signal every 24 hours; a date counting means actuated by the carry signals from said hour counting means for generating date signals; a minute indication means coupled to the minute counting means for performing digital indication of the counts of the minute counting means; an hour/date indication means capable of optionally indicating on a single indication portion the output counts of the hour counting means and of the date counting means; a manually operated switch means for selectively causing said hour/date indicating means to indicate hours and/or date; a first group of AND circuits coupled to said hour counting means and OR circuits coupling said AND circuit to said hour/date indication means for selectively supplying said hour/date indication means with the hour signals from the hour counting means when said manual switch means is not being operated; and a second group of AND circuits coupled to said manual switch means and coupling said hour/date indication means to the date counting means through said OR circuits for selectively supplying said hour/date indication means with the date signals from the date counting means responsive to operation of said manual switch means.
Claim 6
Dependent Claim
267 words
A digital indication type electronic clock device comprising: a clock pulse generating means generating clock signals of a specified highly stable frequency; a minute counting means responsive to said clock signals for generating minute signals by counting said clock signals from said clock pulse generating means and for generating a carry signal every 60 minutes; an hour counting means actuated by the carry signals from said minute counting means for generatiNg hour signals and for generating a carry signal every 24 hours; a date counting means actuated by the carry signals from said hour counting means for generating date signals; a minute indication means coupled to the minute counting means for performing digital indication of the counts of the minute counting means; an hour/date indication means capable of optionally indicating on a single indication portion the output counts of the hour counting means and of the date counting means; a manually operated switch means for selectively causing said hour/date indicating means to indicate hours and/or date; a first group of AND circuits coupled to said hour counting means and OR circuits coupling said AND circuit to said hour/date indication means for selectively supplying said hour/date indication means with the hour signals from the hour counting means when said manual switch means is not being operated; and a second group of AND circuits coupled to said manual switch means and coupling said hour/date indication means to the date counting means through said OR circuits for selectively supplying said hour/date indication means with the date signals from the date counting means responsive to operation of said manual switch means.
Claim 7
Dependent Claim
43 words
A digital indication type electronic clock device according to claim 4 wherein said clock generating means includes a source of standard high frequency signals and a dividing means coupled to said source for dividing the standard high frequency signal into said clock signals.
Claim 8
Dependent Claim
94 words
A digital indication type electronic clock device according to claim 1 wherein said manually operated switch means is coupled to said first group of AND circuits so as to enable said first group of AND circuits when said switch means is not operated, and is coupled to said second group of AND circuits for disabling said second group of AND circuits when said switch means is not operated, said switch means disabling said first group of AND circuits when it is operated and enabling said second group of AND circuits when it is operated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |