US3334192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross field magnetic transducer head
Assignee: IIT Research Institute
•
Filing: 1961-07-24
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Granted: 1967-08-01
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Expires: 1981-07-24
Abstract
No abstract record available.
Inventors
- 👤 Camras Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:39
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; G; G11; G11B; G11B15/00; G11B15/18; G11B5/00; G11B5/02; G11B5/027; G11B5/03; G11B5/127; G11B5/187; G11B5/265; G11B5/465; G11B5/48; G11B5/54; G11B5/55; G11B5/5504; H03; H03F; H03F1/00; H03F1/42; H03F1/48; H03F1/50; H04N5/765; H04N5/775
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A MAGNETIC HEAD FOR COUPLING TO A MAGNETIC RECORD MEDIUM COMPRISING A MAGNETIC CORE HAVING A CROSS FIELD MAGNETIC CIRCUIT AND A RECORDING MAGNETIC CIRCUIT WITH A CROSS FIELD GAP AND A RECORDING GAP RESPECTIVELY THEREIN ACROSS WHICH THE RECORD MEDIUM SUCCESSIVELY TRAVELS, MEANS FOR COUPLING TO SAID CROSS FIELD CIRCUIT FOR ESTABLISHING A MAGNETIC FIELD BRIDGING SAID CROSS FIELD AND RECORDING GAPS IN SERIES, AND MEANS FOR INTRODUCING A RELUCTANCE IN SAID CROSS FIELD CIRCUIT FOR SIGNAL RECORDED WAVELENGTHS COMPARABLE TO THE SPACING BETWEEN THE CROSS FIELD AND RECORDING GAPS, OF THE ORDER OF THE RELUCTANCE OF AN AIR PATH EQUAL TO THE WIDTH DIMENSION OF THE CORE TO REDUCE THE COUPLING OF SAID SIGNAL RECORDED WAVELENGTHS TO A MAGNETIC CIRCUIT INCLUDING THE CROSS FIELD AND RECORDING GAPS IN SERIES DURING PLAYBACK.
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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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |