US4045952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic timepiece apparatus
Assignee: Casio Computer Co Ltd
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Filing: 1976-03-03
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Granted: 1977-09-06
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Expires: 1996-03-03
Abstract
Abstract An electronic timepiece apparatus which comprises an electronic time-counting circuit including an oscillator generating standard clock pulses; time-setting means including an actuating switch for correcting the value of a count made by the electronic time-counting circuit; means for correcting the value of a count made by the electronic time-counting circuit for each prescribed period in accordance with the amount and direction of correction determined as the result of comparison by the time-setting circuit between a given point of time and the correct time; and display means for indicating a given point of time just counted by the electronic time-counting circuit.
Inventors
- 👤 Toshio Kashio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:43
CPC Classifications
G; G04; G04G; G04G5/00; G04G5/02; G04G5/04; G04G5/041
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
233 words
An electronic timepiece comprising: an oscillator for generating standard clock pulses; electronic time counting means coupled to the oscillator for frequency-dividing and counting the clock pulses from the oscillator; display means coupled to the electronic time counting means for indicating the time in accordance with a signal from the electronic time counting means; memory means for storing an amount of correction by which to correct the error in the frequency of the standard clock pulses from the oscillator; control means coupled to the electronic time counting means for adjusting the counting period of the electronic time counting means as a function of the amount of correction stored in the memory means; actuating switch means for correcting the time; time correction control means coupled to the actuating switch means for changing the time upon operation of the actuating switch means; time period counting means for counting the time period between a time-correcting operation initiated by the actuating switch means and the immediately preceding time-correcting operation; means for obtaining an amount of correction for a unit length of time based on the count value of the time period counting means and the period of time by which the time has been changed by the correction control means; and means for changing the amount of correction stored in the memory means as a function of the obtained amount of correction for a unit length of time.
Claim 2
Dependent Claim
233 words
An electronic timepiece comprising: an oscillator for generating standard clock pulses; electronic time counting means coupled to the oscillator for frequency-dividing and counting the clock pulses from the oscillator; display means coupled to the electronic time counting means for indicating the time in accordance with a signal from the electronic time counting means; memory means for storing an amount of correction by which to correct the error in the frequency of the standard clock pulses from the oscillator; control means coupled to the electronic time counting means for adjusting the counting period of the electronic time counting means as a function of the amount of correction stored in the memory means; actuating switch means for correcting the time; time correction control means coupled to the actuating switch means for changing the time upon operation of the actuating switch means; time period counting means for counting the time period between a time-correcting operation initiated by the actuating switch means and the immediately preceding time-correcting operation; means for obtaining an amount of correction for a unit length of time based on the count value of the time period counting means and the period of time by which the time has been changed by the correction control means; and means for changing the amount of correction stored in the memory means as a function of the obtained amount of correction for a unit length of time.
Claim 3
Dependent Claim
62 words
An electronic timepiece according to claim 1, wherein said means for changing the amount of correction stored in the memory means includes means for receiving a signal denoting the direction of correction from said time correction control means; and means for increasing or decreasing the amount of correction in said memory means to a specific degree in accordance with said received signal.
Claim 4
Dependent Claim
62 words
An electronic timepiece according to claim 1, wherein said means for changing the amount of correction stored in the memory means includes means for receiving a signal denoting the direction of correction and the amount of correction from said time correction control means; and means for changing the amount of correction stored in said memory means in accordance with said received signal.
Claim 5
Dependent Claim
34 words
An electronic timepiece according to claim 1, wherein said actuating switch means includes a first switch for use when correcting a time gain, and a second switch for use when correcting a time loss.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |