Patent US3341854A successfully refreshed from Google Patents.
US3341854A
Expired / Lapsed
US
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Modulating magnetic record transfer means
Assignee: International Business Machines Corp
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Filing: 1963-04-30
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Granted: 1967-09-12
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Expires: 1983-04-30
Abstract
No abstract record available.
Inventors
- 👤 Edward J Supernowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:14
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/86; G11B5/865
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A MAGNETIC TRANSFER SYSTEM OF THE TRANSFER MODULATION TYPE COMPRISING: A FIRST MAGNETIC RECORDING MEDIUM; A SECOND MAGNETIC RECORDING MEDIUM ARRANGED TO PASS INTO MAGNETICALLY-COUPLED RELATION TO SAID FIRST RECORDING MEDIUM AT A TRANSFER STATION; SAID FIRST AND SAID SECOND RECORDING MEDIUM HAVING A COMMON TANGENT LINE AT SAID TRANSFER STATION; MOVABLE TRANSDUCER MEANS IN CLOSE PROXIMITY AND SUPPLYING TRANSFER FLUX NORMAL TO SAID FIRST AND SAID SECOND RECORDING MEDIUM AT SAID TRANSFER STATION TO EFFECT MAGNETIC TRANSFER FROM SAID FIRST TO SAID SECOND RECORDING MEDIUM; AND DIFFERENTIAL MEANS FOR IMPARTING A SPEED DIFFERENTIAL BETWEEN SAID FIRST RECORDING MEDIUM AND SAID TRANSDUCER MEANS AND FOR ADDITIONALLY IMPARTING A SECOND SPEED DIFFERENTIAL, DIFFERENT FROM SAID FIRST DIFFERENTIAL, BETWEEN SAID SECOND RECORDING MEDIUM AND SAID TRANSDUCER MEANS.
Claim 2
Dependent Claim
125 words
A MAGNETIC TRANSFER SYSTEM OF THE TRANSFER MODULATION TYPE COMPRISING: A FIRST MAGNETIC RECORDING MEDIUM; A SECOND MAGNETIC RECORDING MEDIUM ARRANGED TO PASS INTO MAGNETICALLY-COUPLED RELATION TO SAID FIRST RECORDING MEDIUM AT A TRANSFER STATION; SAID FIRST AND SAID SECOND RECORDING MEDIUM HAVING A COMMON TANGENT LINE AT SAID TRANSFER STATION; MOVABLE TRANSDUCER MEANS IN CLOSE PROXIMITY AND SUPPLYING TRANSFER FLUX NORMAL TO SAID FIRST AND SAID SECOND RECORDING MEDIUM AT SAID TRANSFER STATION TO EFFECT MAGNETIC TRANSFER FROM SAID FIRST TO SAID SECOND RECORDING MEDIUM; AND DIFFERENTIAL MEANS FOR IMPARTING A SPEED DIFFERENTIAL BETWEEN SAID FIRST RECORDING MEDIUM AND SAID TRANSDUCER MEANS AND FOR ADDITIONALLY IMPARTING A SECOND SPEED DIFFERENTIAL, DIFFERENT FROM SAID FIRST DIFFERENTIAL, BETWEEN SAID SECOND RECORDING MEDIUM AND SAID TRANSDUCER MEANS.
References Cited (Backward Citations)
US2170751A
Cited
US3120001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |