US3925978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time correcting arrangement for electronic wrist watches
Assignee: Suwa Seikosha KK
•
Filing: 1973-07-31
•
Granted: 1975-12-16
•
Expires: 1993-07-31
Abstract
Abstract A time correcting arrangement for an electronic wrist watch wherein time correcting switches for correcting the digital display of time are isolated from the circuit for driving the digital display by a control circuit adapted to pass the signal represented by the time correcting switches only upon the selective actuation of a correcting switch coupled to said control circuit.
Inventors
- 👤 Okito Naito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:32
CPC Classifications
G; G04; G04G; G04G5/00; G04G5/04; G04C; G04C17/00; G04G19/00; G04G19/02; G04G5/02; G04G9/00; G04G9/08; G04G9/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
300 words
An electronic timepiece comprising oscillator circuit means for producing a high frequency time standard signal; frequency divider means for dividing said high frequency time standard signal to produce a plurality of low frequency timekeeping signals; display means for the digital display of time including a display element associated with each said timekeeping signal to be displayed; electronic conTrol circuit means coupled to said divider means; means for providing a correction signal directly coupled to said control circuit means; at least one manually operable time correction switch, each said correction switch being associated with a displayed timekeeping signal to be corrected, each time correction switch being directly coupled to said control circuit means for the selective application of said correction signal through said control circuit means to the divider means for the selective correction of the count of the associated displayed timekeeping signal to be corrected upon the manual actuation of said correction switch; and a manually operable multi-position safety switch directly coupled to said control circuit means, said control circuit means isolating each correction switch from said divider means to prevent selective application of a correction signal by actuation of any of said correction switches when said safety switch is in a first position, and said control circuit means effecting a transmission of a correction signal through said control circuit means and to the divider means in response to actuations of each of said correction switches for effecting time correction of the displayed timekeeping signal associated with the actuated correction switch when said safety switch is in a second position whereby the time standard signal applied by the oscillator means to said divider means to provide timekeeping signals to be displayed is not interrupted during the selective application of said correction signal by each correction switch to the divider means.
Claim 2
Dependent Claim
300 words
An electronic timepiece comprising oscillator circuit means for producing a high frequency time standard signal; frequency divider means for dividing said high frequency time standard signal to produce a plurality of low frequency timekeeping signals; display means for the digital display of time including a display element associated with each said timekeeping signal to be displayed; electronic conTrol circuit means coupled to said divider means; means for providing a correction signal directly coupled to said control circuit means; at least one manually operable time correction switch, each said correction switch being associated with a displayed timekeeping signal to be corrected, each time correction switch being directly coupled to said control circuit means for the selective application of said correction signal through said control circuit means to the divider means for the selective correction of the count of the associated displayed timekeeping signal to be corrected upon the manual actuation of said correction switch; and a manually operable multi-position safety switch directly coupled to said control circuit means, said control circuit means isolating each correction switch from said divider means to prevent selective application of a correction signal by actuation of any of said correction switches when said safety switch is in a first position, and said control circuit means effecting a transmission of a correction signal through said control circuit means and to the divider means in response to actuations of each of said correction switches for effecting time correction of the displayed timekeeping signal associated with the actuated correction switch when said safety switch is in a second position whereby the time standard signal applied by the oscillator means to said divider means to provide timekeeping signals to be displayed is not interrupted during the selective application of said correction signal by each correction switch to the divider means.
Claim 3
Dependent Claim
56 words
An electronic timepiece as claimed in claim 1, wherein said divider means timekeeping signals to be displayed are seconds, minutes, and hours timekeeping signals, and three manually operable time correction switches are provided, one of said time correction switches being associated with each of said seconds, minutes and hours timekeeping signals for the selective correction thereof.
Claim 4
Dependent Claim
18 words
An electronic watch as recited in claim 1, wherein said divider circuit means is formed from C-MOS components.
Claim 5
Dependent Claim
21 words
An electronic watch as recited in claim 1, wherein said control circuit means is a gate circuit formed from C-MOS components.
Claim 6
Dependent Claim
18 words
An electronic watch as recited in claim 1, wherein said digital display means is a liquid crystal display.
References Cited (Backward Citations)
US3733810A
Cited
US3664118A
Cited
US3823545A
Cited
US3768247A
Cited
US3762152A
Cited
US3810356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |