US4287585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chronograph wristwatch
Assignee: Suwa Seikosha KK
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Filing: 1976-11-22
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Granted: 1981-09-01
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Expires: 1996-11-22
Abstract
Abstract An electronic timepiece having a single digital display and being suitable to operate as a standard timekeeping wristwatch or in the alternative as a chronograph. Separate divider circuits are provided for performing the timekeeping and chronograph functions. A single set of switches is provided for controlling the operation of either divider circuit, a single selector circuit selecting which function is to be displayed and which divider is to be controlled by the switches. Indication means are provided for indicating which function is being displayed.
Inventors
- 👤 Hitomi Numabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:01
CPC Classifications
G; G04; G04G; G04G5/00; G04G5/04; G04F; G04F10/00; G04F10/04; G04G9/00; G04G9/08; G04G9/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
265 words
An electronic timepiece comprising oscillator means for generating relatively high frequency time standard signals; chronographic divider means coupled to said oscillator means and adapted to produce low frequency chronographic signals representative of elapsed time in response to said time standard signals; timekeeping divider means coupled to said oscillator means and adapted to produce low frequency timekeeping signals representative of present time in response to said time standard signals; selector circuit means coupled to said chronographic divider means for receiving said chronographic signals and to said timekeeping divider means for receiving said timekeeping signals, said selector circuit means having an output to which one of said chronographic signals and timekeeping signals are selectively applied; and digital display means coupled to the output of said selector circuit means, said digital display means including display elements for displaying one of an elapsed time and lap time in response to said chronographic signal being supplied by said selector circuit means and present time in response to said timekeeping signals supplied by said selector circuit means, said display means including further visual indication means, said further visual indication means being selectively disposed to a preselected visual mode representative of the selective coupling of said chronographic divider means output to said digital display means to display lap time and the continued counting of elapsed time of said chronographic divider means, said further visual indication means including at least one dot in the region of, but not forming a part of, the digital display of time, said dot being flickered when said display means is selectively coupled to the chronographic divider means.
Claim 2
Dependent Claim
265 words
An electronic timepiece comprising oscillator means for generating relatively high frequency time standard signals; chronographic divider means coupled to said oscillator means and adapted to produce low frequency chronographic signals representative of elapsed time in response to said time standard signals; timekeeping divider means coupled to said oscillator means and adapted to produce low frequency timekeeping signals representative of present time in response to said time standard signals; selector circuit means coupled to said chronographic divider means for receiving said chronographic signals and to said timekeeping divider means for receiving said timekeeping signals, said selector circuit means having an output to which one of said chronographic signals and timekeeping signals are selectively applied; and digital display means coupled to the output of said selector circuit means, said digital display means including display elements for displaying one of an elapsed time and lap time in response to said chronographic signal being supplied by said selector circuit means and present time in response to said timekeeping signals supplied by said selector circuit means, said display means including further visual indication means, said further visual indication means being selectively disposed to a preselected visual mode representative of the selective coupling of said chronographic divider means output to said digital display means to display lap time and the continued counting of elapsed time of said chronographic divider means, said further visual indication means including at least one dot in the region of, but not forming a part of, the digital display of time, said dot being flickered when said display means is selectively coupled to the chronographic divider means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |