US4164767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass storage device
Assignee: Unisys Corp
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Filing: 1977-12-23
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Granted: 1979-08-14
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Expires: 1997-12-23
Abstract
Abstract Shown and described are paired floppy-disk memory modules advantageously interlaced together and coupled to a CPU to provide a direct-access Mass Store Memory capability, each module comprising a pair of "short-stack" floppy disk files and an associated pair of transducer-actuator assemblies "shared" by the files.
Inventors
- 👤 Ko K. Gyi
- 👤 Herbert U. Ragle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:40
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/021
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
An improved mass store memory array comprising: a pair of flexible disk packs; a pair of like transducer assemblies, each assembly including transducer means and being arranged and adapted to position the transducer means both axially and laterally of either of said packs whereby the assemblies are "shared" by the two packs; each pack comprising a plurality of flexible recording disks and intermediate radially-vented separator means, these being assembled together and arranged to form a co-rotatable stack with a center-bore of prescribed length and diameter; and a pair of partition means, each operatively associated with a respective pack and being adapted for pneumatic disk separation and partition.
Claim 2
Dependent Claim
107 words
An improved mass store memory array comprising: a pair of flexible disk packs; a pair of like transducer assemblies, each assembly including transducer means and being arranged and adapted to position the transducer means both axially and laterally of either of said packs whereby the assemblies are "shared" by the two packs; each pack comprising a plurality of flexible recording disks and intermediate radially-vented separator means, these being assembled together and arranged to form a co-rotatable stack with a center-bore of prescribed length and diameter; and a pair of partition means, each operatively associated with a respective pack and being adapted for pneumatic disk separation and partition.
Claim 3
Dependent Claim
27 words
The combination as recited in claim 1, wherein said packs are operatively associated with pack rotation means adapted to controllingly rotate the packs at relatively high rpm.
References Cited (Backward Citations)
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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) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |