Patent US4261048A successfully refreshed from Google Patents.
US4261048A
Expired / Lapsed
US
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Analog quartz timepiece
Assignee: Citizen Watch Co Ltd
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Filing: 1979-06-08
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Granted: 1981-04-07
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Expires: 1999-06-08
Abstract
Abstract An analog quartz timepiece having a manually operated external control member, and a correction signal generation circuit controlled by the external control member to generate low speed and high speed correction signals when the external control member is actuated for a short period of time and for a predetermined time interval, respectively, by which a stepping motor is driven at a selected speed to perform time correction. The timepiece also includes a click mechanism operative to shift an hours hand step-wise from any optional position without affecting a minutes hand and a seconds hand. The timepiece further includes a seconds zero-reset mechanism operative to reset the seconds hand to zero.
Inventors
- 👤 Jinro Motoki
- 👤 Singo Ichikawa
- 👤 Kenzi Miyasaka
- 👤 Hiroyuki Uematsu
- 👤 Mitsuhiro Murata
- 👤 Hideyuki Kawashima
- 👤 Yuri Inoue
- 👤 Masae Ohkubo
- 👤 Mituo Oooka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:29
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/001; G04C3/005; G04C3/14; G04C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
288 words
An electronic timepiece having a driver circuit to drive an electro-mechanical transducer connected to time-indicating hands to display time information, comprising, in combination: a frequency standard to provide a relatively high frequency signal; means for dividing down said relatively high frequency signal to provide a first low frequency signal as a time unit signal and second low frequency signals higher in frequency than said first low frequency signal; a manually operable external control member adapted to permit time correction when it is actuated; and correction signal generating means comprising timer means for generating a first output signal when a first prescribed time interval has passed after actuation of said external control member and generating a second output signal when a second prescribed time interval longer than said first prescribed time interval has passed after actuation of said external control member, first circuit means responsive to said first output signal and one of said second low frequency signals to provide a low speed correction signal, and second circuit means responsive to said second output signal and another one of said second low frequency signals to provide a high speed correction signal; said driver circuit being normally responsive to said time unit signal to advance said electro-mechanical transducer and accordingly said time-indicating hands at a normal speed, responsive to said low speed correction signal to cause said electro-mechanical transducer to advance said time-indicating hands at a first predetermined speed higher than normal speed to effect low speed correction of said time-indicating hands, and responsive to said high speed correction signal to cause said electro-mechanical transducer to advance said time-indicating hands at a second predetermined speed higher than said first predetermined speed to effect high speed correction of said time-indicating hands.
Claim 2
Dependent Claim
288 words
An electronic timepiece having a driver circuit to drive an electro-mechanical transducer connected to time-indicating hands to display time information, comprising, in combination: a frequency standard to provide a relatively high frequency signal; means for dividing down said relatively high frequency signal to provide a first low frequency signal as a time unit signal and second low frequency signals higher in frequency than said first low frequency signal; a manually operable external control member adapted to permit time correction when it is actuated; and correction signal generating means comprising timer means for generating a first output signal when a first prescribed time interval has passed after actuation of said external control member and generating a second output signal when a second prescribed time interval longer than said first prescribed time interval has passed after actuation of said external control member, first circuit means responsive to said first output signal and one of said second low frequency signals to provide a low speed correction signal, and second circuit means responsive to said second output signal and another one of said second low frequency signals to provide a high speed correction signal; said driver circuit being normally responsive to said time unit signal to advance said electro-mechanical transducer and accordingly said time-indicating hands at a normal speed, responsive to said low speed correction signal to cause said electro-mechanical transducer to advance said time-indicating hands at a first predetermined speed higher than normal speed to effect low speed correction of said time-indicating hands, and responsive to said high speed correction signal to cause said electro-mechanical transducer to advance said time-indicating hands at a second predetermined speed higher than said first predetermined speed to effect high speed correction of said time-indicating hands.
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) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |