US3304544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random access magnetic memory unit housing
Assignee: International Business Machines Corp
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Filing: 1962-12-27
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Granted: 1967-02-14
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Expires: 1982-12-27
Abstract
No abstract record available.
Inventors
- 👤 Donald D Johnson
- 👤 Vladimir M Lieskovsky
- 👤 Wilbur E Tibbetts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:17
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/03; G11B25/00; G11B25/04; G11B25/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
FOR USE WITH A DISK DRIVE UNIT WHICH INCLUDES A POWER DRIVEN SHAFT AND A TRANSDUCER SUPPORT ASSEMBLY MOUNTED ADJACENT TO AND PROTRUDING TOWARD THE LONGITUDINAL AXIS OF THE SHAFT, A RANDOM ACCESS MEMORY UNIT, COMPRISING: A PROTECTIVE HOUSING FORMING A CLOSED STRUCTURE; A MAGNETIC DISK ASSEMBLY ROTATABLY MOUNTED WITHIN THE HOUSING; MEANS ON THE HOUSING TO PERMIT INTRODUCTION OF THE TRANSDUCER SUPPORT RADIALLY OF THE DISK ASSEMBLY, SAID MEANS INCLUDING SPRING-BIASED DOOR MEANS MOUNTED ON THE HOUSING TO AUTOMATICALLY SEAL THE HOUSING WHEN IT IS SEPARATED FROM THE DISK DRIVE UNIT; AND MEANS EXPOSED TO THE EXTERIOR OF THE HOUSING FOR AFFECTING DRIVING ENGAGEMENT BETWEEN THE DISK ASSEMBLY AND THE POWER DRIVEN SHAFT.
Claim 2
Dependent Claim
114 words
FOR USE WITH A DISK DRIVE UNIT WHICH INCLUDES A POWER DRIVEN SHAFT AND A TRANSDUCER SUPPORT ASSEMBLY MOUNTED ADJACENT TO AND PROTRUDING TOWARD THE LONGITUDINAL AXIS OF THE SHAFT, A RANDOM ACCESS MEMORY UNIT, COMPRISING: A PROTECTIVE HOUSING FORMING A CLOSED STRUCTURE; A MAGNETIC DISK ASSEMBLY ROTATABLY MOUNTED WITHIN THE HOUSING; MEANS ON THE HOUSING TO PERMIT INTRODUCTION OF THE TRANSDUCER SUPPORT RADIALLY OF THE DISK ASSEMBLY, SAID MEANS INCLUDING SPRING-BIASED DOOR MEANS MOUNTED ON THE HOUSING TO AUTOMATICALLY SEAL THE HOUSING WHEN IT IS SEPARATED FROM THE DISK DRIVE UNIT; AND MEANS EXPOSED TO THE EXTERIOR OF THE HOUSING FOR AFFECTING DRIVING ENGAGEMENT BETWEEN THE DISK ASSEMBLY AND THE POWER DRIVEN SHAFT.
References Cited (Backward Citations)
US3229268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |