Patent US3713161A successfully refreshed from Google Patents.
US3368080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tune selection apparatus using light source and photocell
Assignee: Citizen Watch Co Ltd
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Filing: 1966-02-03
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Granted: 1968-02-06
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Expires: 1986-02-03
Abstract
No abstract record available.
Inventors
- 👤 Nakagiri Tadahiko
- 👤 Shimizu Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:24
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/08; G11B3/095; G11B3/0952; G11B3/0957
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
A DETECTING UNIT FOR USE IN AUTOMATIC TUNE SELECTION APPARATUS COMPRISING A DETECTOR ADAPTED TO PROJECT LIGHT RAYS FROM A LIGHT SOURCE TO A PORTION OF THE FACE OF A GRAMOPHONE RECORD IN SUCH MANNER THAT THE REFLECTED LIGHT RAYS FROM A MIRROR FACE PORTION OF AN UN-RECORDED ZONE OF THE RECORD MAY BE PROJECTED ONTO A PLURALITY OF PHOTOELECTRIC ELEMENTS; A CIRCUIT HAVING A FIRST AND A SECOND ONES OF SAID A PLURALITY OF PHOTOELECTRIC ELEMENTS SYMMETRICALLY CONNECTED RELATIVE TO AN INPUT POINT OF SAID CIRCUIT, SAID CIRCUIT BEING ARRANGED IN SUCH A MANNER THAT A FIRST ONE OF SAID PLURALITY OF PHOTOELECTRIC ELEMENTS IS USED FOR THE DETECTION OF THE LOCATION OF AN UN-RECORDED PORTION OF THE RECORD AND THAT SAID A SECOND ONE OF SAID PHOTOELECTRIC ELEMENTS IS USED FOR CORRECTING THE REFLECTION FACTOR OF THE RECORD FACE AND FOR CORRECTING THE VARIATION FACTORS OF THE PHOTOELECTRIC ELEMENTS AND ALSO IN SUCH MANNER THAT A SIGNAL WAVE FORM SYMMETRICAL RELATIVE TO AN INPUT LEVEL IS PRODUCED; AND A CIRCUIT ARRANGED TO FORM A SHAPED PULSE CORRESPONDING TO AN UN-RECORDED PORTION BY TWO LEVELS OF A BI-STABLE CIRCUIT HAVING HYSTERESIS ESTABLISHED CLOSE TO THE PEAK POINTS OF SAID SIGNAL WAVE, RESPECTIVELY.
Claim 2
Dependent Claim
203 words
A DETECTING UNIT FOR USE IN AUTOMATIC TUNE SELECTION APPARATUS COMPRISING A DETECTOR ADAPTED TO PROJECT LIGHT RAYS FROM A LIGHT SOURCE TO A PORTION OF THE FACE OF A GRAMOPHONE RECORD IN SUCH MANNER THAT THE REFLECTED LIGHT RAYS FROM A MIRROR FACE PORTION OF AN UN-RECORDED ZONE OF THE RECORD MAY BE PROJECTED ONTO A PLURALITY OF PHOTOELECTRIC ELEMENTS; A CIRCUIT HAVING A FIRST AND A SECOND ONES OF SAID A PLURALITY OF PHOTOELECTRIC ELEMENTS SYMMETRICALLY CONNECTED RELATIVE TO AN INPUT POINT OF SAID CIRCUIT, SAID CIRCUIT BEING ARRANGED IN SUCH A MANNER THAT A FIRST ONE OF SAID PLURALITY OF PHOTOELECTRIC ELEMENTS IS USED FOR THE DETECTION OF THE LOCATION OF AN UN-RECORDED PORTION OF THE RECORD AND THAT SAID A SECOND ONE OF SAID PHOTOELECTRIC ELEMENTS IS USED FOR CORRECTING THE REFLECTION FACTOR OF THE RECORD FACE AND FOR CORRECTING THE VARIATION FACTORS OF THE PHOTOELECTRIC ELEMENTS AND ALSO IN SUCH MANNER THAT A SIGNAL WAVE FORM SYMMETRICAL RELATIVE TO AN INPUT LEVEL IS PRODUCED; AND A CIRCUIT ARRANGED TO FORM A SHAPED PULSE CORRESPONDING TO AN UN-RECORDED PORTION BY TWO LEVELS OF A BI-STABLE CIRCUIT HAVING HYSTERESIS ESTABLISHED CLOSE TO THE PEAK POINTS OF SAID SIGNAL WAVE, RESPECTIVELY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |