Patent US3566381A successfully refreshed from Google Patents.
US3566381A
Expired / Lapsed
US
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Data storage means having both fixed and removable record disk means
Assignee: International Business Machines Corp
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Filing: 1967-09-15
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Granted: 1971-02-23
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Expires: 1987-09-15
Abstract
Abstract A DEVICE FOR MOVING A CARRIER EMPLOYS PERPENDICULARLY DISPOSED SHAFTS, ONE CARRYING A FLEXIBLE DISK AND THE OTHER SPACED WHEELS. A CARRIAGE IS MOUNTED TO ONE OF THE SHAFTS, WHICH IS THREADED, AND, WHEN ONE OF THE WHEELS IS MADE TO CONTACT THE FLEXIBLE DISK, THE CARRIAGE IS TRANSPORTED IN A DESIRED DIRECTION. WHEN USED IN A RANDOM ACCESS MAGNETIC DISK FILE, THE CARRIAGE SUPPORTS AT LEAST ONE MAGNETIC HEAD ASSEMBLY FOR BIDRIECTIONAL MOVEMENT RELATIVE TO THE MAGNETIC RECORD DISK. THE DISK FILE DISCLOSED HEREIN USES A FIXED MAGNETIC DISK AND A REMOVABLE, REPLACEABLE MAGNETIC DISK, BOTH SEATED TO THE SAME SPINDLE ASSEMBLY.
Inventors
- 👤 Walter S Buslik
- 👤 Ralph E Marrs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:16
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/022; G11B17/038; G11B19/00; G11B19/20; G11B19/26; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521
Claims Analysis
Total Claims: 0
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |