Patent US3288986A successfully refreshed from Google Patents.
US3288986A
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Assignee: Akai Electric Co Ltd
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Filing: 1963-07-09
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Granted: 1966-11-29
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Expires: 1983-07-09
Abstract
No abstract record available.
Inventors
- 👤 Muto Kenji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:40
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/34; G11B27/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN A DROP-OUTS COUNTER FOR MAGNETIC TAPE, A RECTIFIER FOR CONVERTING A DELIVERED A.C. SIGNAL HAVING A SCHEDULED CONSTANT LEVEL FROM A TAPE RECORDER INTO A CORRESPONDING D.C. SIGNAL, A TRANSISTORED CIRCUIT ELECTRICALLY CONNECTED WITH SAID RECTIFIER FOR SUBJECTING SAID RECTIFIED SIGNAL TO PHASE CONVERSION AND AMPLIFICATION, A TIMER ELECTRICALLY CONNECTED TO SAID CIRCUIT FOR LIMITING THE OUTPUT THEREFROM FOR A PREDETERMINED TIME PERIOD SUCH AS A MINUTE, AND AN ELECTROMAGNETICALLY OPERATED COUNTER HAVING A DRIVE COIL AND A DIGITAL TYPE COUNTER MECHANISM AND MEANS FOR INITIATING OPERATION OF SAID COUNTER MECHANISM AND UPON ENERGIZATION OF SAID COIL BY A PULSATIVE OUTPUT HIGHER THAN A PREDETERMINED LEVEL FROM SAID CIRCUIT SAID LEVEL BEING DETERMINED AS A FUNCTION OF A DROP-OUT OF A PREDETERMINED DEVIATION AND FOR A PREDETERMINED TIME PERIOD IN SAID RECEIVED SIGNAL.
Claim 2
Dependent Claim
134 words
IN A DROP-OUTS COUNTER FOR MAGNETIC TAPE, A RECTIFIER FOR CONVERTING A DELIVERED A.C. SIGNAL HAVING A SCHEDULED CONSTANT LEVEL FROM A TAPE RECORDER INTO A CORRESPONDING D.C. SIGNAL, A TRANSISTORED CIRCUIT ELECTRICALLY CONNECTED WITH SAID RECTIFIER FOR SUBJECTING SAID RECTIFIED SIGNAL TO PHASE CONVERSION AND AMPLIFICATION, A TIMER ELECTRICALLY CONNECTED TO SAID CIRCUIT FOR LIMITING THE OUTPUT THEREFROM FOR A PREDETERMINED TIME PERIOD SUCH AS A MINUTE, AND AN ELECTROMAGNETICALLY OPERATED COUNTER HAVING A DRIVE COIL AND A DIGITAL TYPE COUNTER MECHANISM AND MEANS FOR INITIATING OPERATION OF SAID COUNTER MECHANISM AND UPON ENERGIZATION OF SAID COIL BY A PULSATIVE OUTPUT HIGHER THAN A PREDETERMINED LEVEL FROM SAID CIRCUIT SAID LEVEL BEING DETERMINED AS A FUNCTION OF A DROP-OUT OF A PREDETERMINED DEVIATION AND FOR A PREDETERMINED TIME PERIOD IN SAID RECEIVED SIGNAL.
References Cited (Backward Citations)
US2516189A
Cited
US3020749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |