US3150358A
Expired / Lapsed
US
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Data detection system for reproducing magnetic binary information
Assignee: International Business Machines Corp
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Filing: 1962-05-31
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Granted: 1964-09-22
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Expires: 1982-05-31
Abstract
No abstract record available.
Inventors
- 👤 Ernest G Newman
- 👤 Lawrence A Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:11
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265; G11B20/00; G11B20/10; G11B20/12; G11B20/1201; G11B20/1202; G11B20/1205; G11B20/16; G11B5/33; G11B5/335
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
A REPRODUCTING SYSTEM FOR MAGNETIC TAPE RECORDINGS OF BINARY INFORMATION WHEREIN BINARY INFORMATION IS REPRESENTED BY TRANSITIONS OF MAGNETIC FLUX FROM ONE POLARITY TO THE OPPOSITE POLARITY AND FURTHER WHERE THE TAPE IS TRANSPORTED PAST A REPRODUCING HEAD COMPRISING: MEANS FOR DERIVING A MODULATED CARRIER WAVE ELECTRICAL SIGNAL FROM SAID HEAD HAVING AN AMPLITUDE AND ONE OF TWO OPPOSITE PHASES DEPENDENT ON THE POLARITY OF THE MAGNETIZATION ON SAID TAPE, MEANS FOR DETECTING THE PHASE OF SAID CARRIER WAVE, MEANS RESPONSIVE TO A PREDETERMINED AMPLITUDE OF SAID CARRIER WAVE SIGNAL FOR DEVELOPING A CONTROL PULSE, AND OUTPUT MEANS RESPONSIVE TO SAID CONTROL PULSE AND SAID PHASE DETECTING MEANS FOR PRODUCING A SIGNAL FROM SAID OUTPUT MEANS WHEN SAID PHASE DETECTING MEANS DETECTS A CHANGE IN PHASE OF SAID CARRIER WAVE SIGNAL.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |