US3560946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating-head memory system utilizing non-contacting flexible record member
Assignee: Unisys Corp
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Filing: 1968-01-03
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Granted: 1971-02-02
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Expires: 1988-01-03
Abstract
Abstract A MEMORY SYSTEM HAVING MAGNETIC TRANSDUCERS MOUNTED IN A ROTATABLE SUPPORT MEMBER FOR COOPERATING WITH FLEXIBLE RECORD MEMBERS IS DESCRIBED. A SYSTEM FOR MOUNTING THE TRANSDUCER SELECTION CIRCUITS WITHIN THE ROTATABLE SUPPORT MEMBER IS ALSO DESCRIBED. THE ROTATABLE SUPPORT MEMBER SUPPORTS THE FLEXIBLE RECORD MEMBERS ON A BOUNDARY LAYER OF AIR, AND A RECORD MEMBER PROFILE CORRECTION SYS- TEM ENSURES THAT THE FLEXIBLE RECORD MEMBERS ARE UNIFORMLY POSITIONED TO COOPERATE WITH THE MOVING TRANSDUCERS.
Inventors
- 👤 Gregory J Ehalt
- 👤 George D Bukovich
- 👤 Willard C Neuman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:11
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B15/00; G11B15/60; G11B15/62; G11B15/64
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |