US4091454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-centering disk having an eccentric elliptical-shaped center locating hole
Assignee: International Business Machines Corp
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Filing: 1976-11-02
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Granted: 1978-05-23
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Expires: 1996-11-02
Abstract
Abstract A magnetic disk member for a memory disk file usable in a data processing system includes an eccentric multi-lobed triangular center locating hole to facilitate concentric mounting of the locating hole centerlines in a multiple disk pack memory. The disks are centered in a disk pack by placing onto a drive hub having ribs to match the lobes of the locating holes.
Inventors
- 👤 Elwood Ludwig Kauffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:48
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/038; G11B23/00; G11B23/0014; G11B23/0021; G11B23/0028; G11B23/0035; H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/18; H01F10/20
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
43 words
A disk record member for self-centering around a drive hub in an assembly comprising: a flat substrate essentially circularly shaped; a multilobed center locating drive hole in said substrate; formed from eccentric arcuate bearing surfaces; and means for storing information on said substrate.
Claim 2
Dependent Claim
43 words
A disk record member for self-centering around a drive hub in an assembly comprising: a flat substrate essentially circularly shaped; a multilobed center locating drive hole in said substrate; formed from eccentric arcuate bearing surfaces; and means for storing information on said substrate.
Claim 3
Dependent Claim
26 words
A disk record member as defined in claim 1 wherein said center locating drive hole comprises three equal lobes formed from three equal arcuate bearing surfaces.
Claim 4
Dependent Claim
20 words
A disk record member as defined in claim 1 wherein said substrate is made from aluminum or an aluminum alloy.
Claim 5
Dependent Claim
24 words
A disk record member as defined in claim 1 wherein said means for storing information comprises a layer of a magnetizable iron oxide compound.
Claim 6
Dependent Claim
123 words
A disk file for processing signals by transducing operation between a transducer and a rotating disk comprising: at least one disk each having a multilobed center locating hole including angularly spaced eccentric arcuate bearing surfaces and with each disk having information stored thereon in the form of impulses; a transducer means for sensing the impulses from said disks; a rotary drive hub assembly having a number of protrusions equal in number to the lobes of said disk for engaging said arcuate bearing surfaces of said center locating hole of each disk to drive said disks; drive means connected to said hub assembly for rotating said hub assembly and said disks; and means for loading said disks into intimate contact with said transducer means.
Claim 7
Dependent Claim
123 words
A disk file for processing signals by transducing operation between a transducer and a rotating disk comprising: at least one disk each having a multilobed center locating hole including angularly spaced eccentric arcuate bearing surfaces and with each disk having information stored thereon in the form of impulses; a transducer means for sensing the impulses from said disks; a rotary drive hub assembly having a number of protrusions equal in number to the lobes of said disk for engaging said arcuate bearing surfaces of said center locating hole of each disk to drive said disks; drive means connected to said hub assembly for rotating said hub assembly and said disks; and means for loading said disks into intimate contact with said transducer means.
Claim 8
Dependent Claim
27 words
A disk file as defined in claim 5 wherein said center locating hole of each disk comprises three equal lobes formed from three equal arcuate bearing surfaces.
Claim 9
Dependent Claim
27 words
A disk file as defined in claim 5 wherein said disk comprises a flat substrate essentially circularly shaped and includes means for storing information on said substrate.
Claim 10
Dependent Claim
19 words
A disk file as defined in claim 7 wherein said substrate is made from aluminum or an aluminum alloy.
Claim 11
Dependent Claim
23 words
A disk file as defined in claim 7 wherein said means for storing information comprises a layer of a magnetizable iron oxide compound.
Claim 12
Dependent Claim
29 words
A disk file as defined in claim 5 wherein said hub assembly includes three ribs for engaging said center locating hole of each disk having three equal eccentric lobes.
Claim 13
Dependent Claim
22 words
A disk file as defined in claim 5 wherein said transducer means is adapted for imprinting the information stored on said disks.
Claim 14
Dependent Claim
15 words
A disk file as defined in claim 5 wherein said transducer means senses magnetic impulses.
Claim 15
Dependent Claim
74 words
A disk file comprising: at least one disk each having a multilobed, center locating hole formed from angularly spaced eccentric arcuate bearing surfaces and with each disk having information stored thereon in the form of impulses; and a rotary drive hub assembly having a number of protrusions equal in number to the lobes of said disk for engaging said arcuate bearing surfaces of said center locating hole of each disk to drive said disks.
Claim 16
Dependent Claim
74 words
A disk file comprising: at least one disk each having a multilobed, center locating hole formed from angularly spaced eccentric arcuate bearing surfaces and with each disk having information stored thereon in the form of impulses; and a rotary drive hub assembly having a number of protrusions equal in number to the lobes of said disk for engaging said arcuate bearing surfaces of said center locating hole of each disk to drive said disks.
Claim 17
Dependent Claim
27 words
A disk file as defined in claim 13 wherein said center locating hole of each disk comprises three equal lobes formed from three equal arcuate bearing surfaces.
Claim 18
Dependent Claim
27 words
A disk file as defined in claim 13 wherein said disk comprises a flat substrate essentially circularly shaped and includes means for storing informaton on said substrate.
Claim 19
Dependent Claim
19 words
A disk file as defined in claim 15 wherein said substrate is made from aluminum or an aluminum alloy.
Claim 20
Dependent Claim
23 words
A disk file as defined in claim 15 wherein said means for storing information comprises a layer of a magnetizable iron oxide compound.
Claim 21
Dependent Claim
29 words
A disk file as defined in claim 13 wherein said hub assembly includes three ribs for engaging said center locating hole of each disk having three equal eccentric lobes.
Claim 22
Dependent Claim
20 words
A disk file as defined in claim 13 further including a transducer means for sensing the impulses from said disks.
Claim 23
Dependent Claim
23 words
A disk file as defined in claim 19 further including a means for loading said transducer means into intimate contact with said disk.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |