Patent US4188650A successfully refreshed from Google Patents.
US4188650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diskette with access cover means
Assignee: Alcatel Lucent NV
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Filing: 1978-03-06
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Granted: 1980-02-12
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Expires: 1998-03-06
Abstract
Abstract A flexible memory disk for a computer or the like and adapted to be carried in a diskette. The disk has been known in the past and is known now as a "floppy disk". Auxiliary disks are inserted on each side of the memory disk. A housing is provided which contains all disks. Both housing and auxiliary disks contain corresponding slots and holes. The auxiliary disks are rotatable between two positions. In one position the slots are in alignment. Access is then provided for a read/write to engage a memory disk surface. In another position, the memory disk surface is covered by the auxiliary disks at the location of certain slots.
Inventors
- 👤 Wolf-Heider Rein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:28
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/03; G11B23/00; G11B23/02; G11B23/03; G11B23/033; G11B23/0332; G11B23/50; G11B23/505
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
A diskette comprising: a housing having approximately parallel side walls, each of said side walls having a first opening therethrough, said first openings being aligned; a pair of parallel auxiliary disks slidable inside said housing against respective ones of said housing side walls; means to hold said auxiliary disks in fixed positions relative to each other, each of said auxiliary disks having a second opening, said second openings always being aligned with each other, said auxiliary disks being slidable back and forth on said respective side walls between first and second positions, said first openings being completely out of registration with said second openings when said auxiliary disks are in said first position, said first openings being at least in partial registration with said second openings when said auxiliary disks are in said second position; and a memory disk rotatable in between said auxiliary disks in frictional engagement therewith, the frictional force between said memory disk and said auxiliary disks being greater than that between said auxiliary disks and said housing sidewalls.
Claim 2
Dependent Claim
172 words
A diskette comprising: a housing having approximately parallel side walls, each of said side walls having a first opening therethrough, said first openings being aligned; a pair of parallel auxiliary disks slidable inside said housing against respective ones of said housing side walls; means to hold said auxiliary disks in fixed positions relative to each other, each of said auxiliary disks having a second opening, said second openings always being aligned with each other, said auxiliary disks being slidable back and forth on said respective side walls between first and second positions, said first openings being completely out of registration with said second openings when said auxiliary disks are in said first position, said first openings being at least in partial registration with said second openings when said auxiliary disks are in said second position; and a memory disk rotatable in between said auxiliary disks in frictional engagement therewith, the frictional force between said memory disk and said auxiliary disks being greater than that between said auxiliary disks and said housing sidewalls.
Claim 3
Dependent Claim
28 words
The invention as defined in claim 1, wherein said first openings are in complete registration with said second openings when said auxiliary disks are in said second position.
Claim 4
Dependent Claim
42 words
The invention as defined in claim 2, wherein at least one of said auxiliary disks and one of said side walls have mutually engagable stop means to limit movement of said auxiliary disks beyond either one of said first and second positions.
Claim 5
Dependent Claim
42 words
The invention as defined in claim 1, wherein at least one of said auxiliary disks and one of said side walls have mutually engagable stop means to limit movement of said auxiliary disks beyond either one of said first and second positions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |