US3757509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chronograph timepiece using digital display
Assignee: Suwa Seikosha KK
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Filing: 1972-03-07
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Granted: 1973-09-11
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Expires: 1992-03-07
Abstract
Abstract A chronograph timepiece using digital display in an electronic chronograph watch in which digital display is effected by a liquid or solid state display device, wherein the time of day is measured by a watch mechanism and a time period is measured by a chronograph mechanism and these are memorized in a resistor device. The memorized time and time period are selectively displayed in the display device.
Inventors
- 👤 K Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
G; G04; G04F; G04F10/00; G04F10/04; G04G; G04G9/00; G04G9/08; G04G9/087
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
An electronic chronograph timepiece comprising digital display means, a watch mechanism for producing signals representing time of day, a chronograph mechanism for producing signals representative of a time period, a first divider circuit for said watch mechanism, a second divider circuit for said chronograph mechanism, resistor memory means for momentarily memorizing signals produced by said first or second divider circuit, a gate circuit for controlling the feed of the signal of said first or second divider circuit to said resistor means, and switch means for operating said gate circuit, said digital display means including a digital display device for displaying the signal from said resistor means.
Claim 2
Dependent Claim
106 words
An electronic chronograph timepiece comprising digital display means, a watch mechanism for producing signals representing time of day, a chronograph mechanism for producing signals representative of a time period, a first divider circuit for said watch mechanism, a second divider circuit for said chronograph mechanism, resistor memory means for momentarily memorizing signals produced by said first or second divider circuit, a gate circuit for controlling the feed of the signal of said first or second divider circuit to said resistor means, and switch means for operating said gate circuit, said digital display means including a digital display device for displaying the signal from said resistor means.
Claim 3
Dependent Claim
74 words
An electronic timepiece as claimed in claim 1 wherein the signals from said first and second counters are fed in parallel to said resistor means corresponding to the changes of said signals momentarily and selectively, and said signals are not fed to said resistor means only when the switch for operating said gate circuit is operated, whereas a signal fed to said resistor means at the moment of operating said switch is retained statically.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |