US3931645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible disk storage apparatus having disks of various radii for enhancing axial disk location
Assignee: International Business Machines Corp
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Filing: 1974-08-29
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Granted: 1976-01-06
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Expires: 1994-08-29
Abstract
Abstract A flexible disk file signal storage apparatus has a multiplicity of relatively thin, flexible disks of varying radii and arranged axially to facilitate radial disk selection. The radii pattern tends to minimize radii differences, thereby enhancing storage capacity. The flexible disks are arranged in axial groups of more than three disks with at least one disk in each group having a minimum radius with a pair of outer disks with a maximum radius plus at least one intermediate diameter disk. By interleaving alternate ones of said minimum radius disks between intermediate and maximum radius disks, radial selection access ports are maximized along an axial direction for a given radial difference between the maximum and minimum disk radii.
Inventors
- 👤 Paul D. Dodd
- 👤 Donald E. Griffiths
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:02
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B17/00; G11B17/02; G11B17/021; G11B5/74; G11B5/82; G11B5/825
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
119 words
A flexible disk assembly, including in combination: a center support; a plurality of flexible record indicia type disk members of various radii coaxially disposed on said support in at least one group of a plurality of such disks; and said group having a pair of outer disk members with a maximum radius, and at least one disk member axially interleaved between said outer disk members and having a smaller radius than said outer disk members and a pair of minimum radii disk members with radii less than the radius of said one disk member respectively axially interleaved between said outer and said one disk member for enhancing axial selection of any one of said flexible disks in said group.
Claim 2
Dependent Claim
119 words
A flexible disk assembly, including in combination: a center support; a plurality of flexible record indicia type disk members of various radii coaxially disposed on said support in at least one group of a plurality of such disks; and said group having a pair of outer disk members with a maximum radius, and at least one disk member axially interleaved between said outer disk members and having a smaller radius than said outer disk members and a pair of minimum radii disk members with radii less than the radius of said one disk member respectively axially interleaved between said outer and said one disk member for enhancing axial selection of any one of said flexible disks in said group.
Claim 3
Dependent Claim
27 words
The assembly set forth in claim 1 wherein said minimum radius disks are axially alternately disposed on said support with disks of other than said minimum radius.
Claim 4
Dependent Claim
69 words
A flexible disk assembly, including in combination: a center support; a plurality greater than three of circular record indicia type disks coaxially disposed on said support; said disks having different radii between a maximum radius and a minimum radius and at least one disk having an intermediate radius greater than said minimum and less than said maximum radius; and axially alternate ones of said disks having said minimum radius.
Claim 5
Dependent Claim
69 words
A flexible disk assembly, including in combination: a center support; a plurality greater than three of circular record indicia type disks coaxially disposed on said support; said disks having different radii between a maximum radius and a minimum radius and at least one disk having an intermediate radius greater than said minimum and less than said maximum radius; and axially alternate ones of said disks having said minimum radius.
Claim 6
Dependent Claim
37 words
The assembly set forth in claim 3 having three disks axially interleaved between each two of said disks with said maximum radius and which are axially adjacent and two of said three disks having said minimum radius.
Claim 7
Dependent Claim
70 words
The assembly set forth in claim 3 having a pair of axially spaced-apart ones of said maximum radius disks; a first one disk having a radius next to maximum and axially spaced centrally between said pair of maximum radius disks; and a pair of second one disks having a second next to maximum radius and axially spaced centrally between said first one disk and said pair of maximum radius disks.
Claim 8
Dependent Claim
54 words
The assembly set forth in claim 5 further including a plurality of said pairs of maximum radius disks wherein said plurality less one of said maximum radius disks are in two axially adjacent pairs and each said disk having a radius either greater than or less than both axially adjacent ones of said disks.
Claim 9
Dependent Claim
52 words
The assembly set forth in claim 3 having a plurality greater than three disks between any two most axially adjacent minimum radius disks, a plurality of said one disks axially interposed between said any two maximum radius disks with differing radii and being axially symmetrically disposed in accordance with said differing radii.
Claim 10
Dependent Claim
52 words
A flexible disk assembly, including in combination: a center support; a plurality of record indicia type circular disks coaxially disposed on said support, different ones of said disks having at least three different radii; and a plurality of minimum radius disks axially alternatively disposed with disks having other than said minimum radius.
Claim 11
Dependent Claim
52 words
A flexible disk assembly, including in combination: a center support; a plurality of record indicia type circular disks coaxially disposed on said support, different ones of said disks having at least three different radii; and a plurality of minimum radius disks axially alternatively disposed with disks having other than said minimum radius.
Claim 12
Dependent Claim
71 words
The assembly set forth in claim 8 wherein said disks having other than said minimum radius have an increasing axial spacing from like radius disks in accordance with increasing radius for all disks axially intermediate and up to, but not including, disks having a maximum radius whereby the greater the radius, the greater the axial spacing from a disk having a like radius between any two of said maximum radius disks.
Claim 13
Dependent Claim
66 words
The assembly set forth in claim 8 having plural sets of disks of different radii with disks in each set of disks being axially spaced an equal axial distance with some greater radii disks having a greater axial spacing than lesser radii disks and some of said greater radii disks of different sets having identical spacings and said sets each having disks that are axially interleaved.
Claim 14
Dependent Claim
120 words
A flexible disk assembly, including in combination: a center support; a plurality of record indicia type circular disks coaxially disposed on said center support; a plurality of first ones of said disks each having a maximum radius; a first plurality of second ones of said disks each having a minimum radius and a smaller plurality than said first plurality of said second one disks axially interleaved between two of said first one disks; and a plurality of third ones of said disks each having a radius intermediate said minimum and maximum radii and axially interleaved between said first one disks and including at least one of said third one disks axially disposed between any two of said first one disks.
Claim 15
Dependent Claim
120 words
A flexible disk assembly, including in combination: a center support; a plurality of record indicia type circular disks coaxially disposed on said center support; a plurality of first ones of said disks each having a maximum radius; a first plurality of second ones of said disks each having a minimum radius and a smaller plurality than said first plurality of said second one disks axially interleaved between two of said first one disks; and a plurality of third ones of said disks each having a radius intermediate said minimum and maximum radii and axially interleaved between said first one disks and including at least one of said third one disks axially disposed between any two of said first one disks.
References Cited (Backward Citations)
US3852820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |