Patent US3347997A successfully refreshed from Google Patents.
US3347997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Playback system utilizing variable delay and speed control means for flutter and wowcompensation
Assignee: Lockheed Martin Corp
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Filing: 1963-08-07
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Granted: 1967-10-17
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Expires: 1983-08-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Woodruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:04
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
FLUTTER COMPENSATING APPARATUS COMPRISING: (A) A PLAYBACK DEVICE FOR SIMULATNEOUSLY PROVIDING A REFERENCE SIGNAL AND AN INFORMATION SIGNAL, (B) A TIME ERROR DETECTOR, THE REFERENCE SIGNAL OUTPUT OF THE PLAYBACK DEVICE BEING COUPLED TO THE TIME ERROR DETECTOR TO CAUSE THE TIME ERROR DETECTOR TO PROVIDE AN OUTPUT SIGNAL RELATED TO THE FLUTTER OF THE REFERENCE SIGNAL, (C) A VARIABLE DELAY DEVICE HAVING ITS DELAY TIME CONTROLLED BY ONLY THE HIGH FREQUENCY COMPONENT OF THE OUTPUT OF THE TIME ERROR DETECTOR, (D) MEANS FOR FEEDING THE INFORMATION SIGNAL FROM THE PLAYBACK DEVICE INTO THE DELAY DEVICE, AND (E) SAID DELAY DEVICE AND SAID TIME ERROR DETECTOR COMPRISING A CLOSED LOOP FEEDBACK SYSTEM WHEREBY THE HIGH FREQUENCY OUTPUT OF SAID TIME ERROR DETECTOR IS CONTINUOUSLY FED BACK TO THE DELAY DEVICE.
Claim 2
Dependent Claim
130 words
FLUTTER COMPENSATING APPARATUS COMPRISING: (A) A PLAYBACK DEVICE FOR SIMULATNEOUSLY PROVIDING A REFERENCE SIGNAL AND AN INFORMATION SIGNAL, (B) A TIME ERROR DETECTOR, THE REFERENCE SIGNAL OUTPUT OF THE PLAYBACK DEVICE BEING COUPLED TO THE TIME ERROR DETECTOR TO CAUSE THE TIME ERROR DETECTOR TO PROVIDE AN OUTPUT SIGNAL RELATED TO THE FLUTTER OF THE REFERENCE SIGNAL, (C) A VARIABLE DELAY DEVICE HAVING ITS DELAY TIME CONTROLLED BY ONLY THE HIGH FREQUENCY COMPONENT OF THE OUTPUT OF THE TIME ERROR DETECTOR, (D) MEANS FOR FEEDING THE INFORMATION SIGNAL FROM THE PLAYBACK DEVICE INTO THE DELAY DEVICE, AND (E) SAID DELAY DEVICE AND SAID TIME ERROR DETECTOR COMPRISING A CLOSED LOOP FEEDBACK SYSTEM WHEREBY THE HIGH FREQUENCY OUTPUT OF SAID TIME ERROR DETECTOR IS CONTINUOUSLY FED BACK TO THE DELAY DEVICE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |