Patent US3381083A successfully refreshed from Google Patents.
US3381083A
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Magnetic recorder equalization system having continually adjusted compensation
Assignee: Ampex Corp
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Filing: 1965-03-12
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Granted: 1968-04-30
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Expires: 1985-03-12
Abstract
No abstract record available.
Inventors
- 👤 Peter W Jensen
- 👤 Charles H Coleman
- 👤 Allen J Trost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:05
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/793; G; G11; G11B; G11B15/00; G11B15/02; G11B15/12; G11B15/14; H04N5/00; H04N5/76; H04N5/91; H04N5/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
AN EQUALIZATION SYSTEM FOR A RECORDER EMPLOYING A RECORDING MEDIUM HAVING AN EQUALIZER CORRECTION SIGNAL AND INFORMATION SIGNAL RECORDED THEREON, COMPRISING: A TRANSDUCER MEANS FOR TRANSDUCING SAID INFORMATION SIGNAL AND SAID CORRECTION SIGNAL FROM THE RECORDING MEDIUM; EQUALIZER MEANS FOR COMPENSATING FOR THE NORMAL RESPONSE OF SAID TRANSDUCER MEANS OVER AT LEAST A PART OF THE FREQUENCY RANGE OF SIGNALS REPRODUCED BY SAID TRANSDUCER; AND EQUALIZER CORRECTION MEANS FOR RECEIVING SAID CORRECTION SIGNAL FROM SAID TRANSDUCER AND FOR APPLYING A CORRECTION SIGNAL TO SAID EQUALIZER MEANS TO CONTINUALLY AND AUTOMATICALLY ADJUST THE COMPENSATION OF SAID EQUALIZER MEANS, WHEREBY THE OPERATION AND EFFICIENCY OF SAID TRANSDUCER IS MAINTAINED DURING CHANGING CONDITIONS.
Claim 2
Dependent Claim
110 words
AN EQUALIZATION SYSTEM FOR A RECORDER EMPLOYING A RECORDING MEDIUM HAVING AN EQUALIZER CORRECTION SIGNAL AND INFORMATION SIGNAL RECORDED THEREON, COMPRISING: A TRANSDUCER MEANS FOR TRANSDUCING SAID INFORMATION SIGNAL AND SAID CORRECTION SIGNAL FROM THE RECORDING MEDIUM; EQUALIZER MEANS FOR COMPENSATING FOR THE NORMAL RESPONSE OF SAID TRANSDUCER MEANS OVER AT LEAST A PART OF THE FREQUENCY RANGE OF SIGNALS REPRODUCED BY SAID TRANSDUCER; AND EQUALIZER CORRECTION MEANS FOR RECEIVING SAID CORRECTION SIGNAL FROM SAID TRANSDUCER AND FOR APPLYING A CORRECTION SIGNAL TO SAID EQUALIZER MEANS TO CONTINUALLY AND AUTOMATICALLY ADJUST THE COMPENSATION OF SAID EQUALIZER MEANS, WHEREBY THE OPERATION AND EFFICIENCY OF SAID TRANSDUCER IS MAINTAINED DURING CHANGING CONDITIONS.
References Cited (Backward Citations)
US3188615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |