US3882473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic disk storage file
Assignee: International Business Machines Corp
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Filing: 1970-03-18
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Granted: 1975-05-06
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Expires: 1990-03-18
Abstract
Abstract A magnetic disk storage file employs a plurality of magnetic transducers for each recording disk surface, and at least one transducer is associated with each data track. The transducer assemblies are supported by racks, which are mounted in stacked fashion to pivotable posts. The posts are fixed in a precise position relative to the true axis of the spindle on which the storage disks are mounted for rotation. The posts are pivotable so that the transducer assemblies and racks may be retracted for easy replacement, and returned to the same precise position and alignment relative to the data disk surface, whereby each transducer bears the same relation to its associated data track as it had prior to retraction.
Inventors
- 👤 Henry G Hoehmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:53
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B23/00; G11B23/02; G11B23/03; G11B23/032; G11B23/0323; G11B5/49; G11B5/4969; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
191 words
A fixed head magnetic disk storage file comprising: a housing; a drive spindle defining a rotational axis positioned in said housing; a plurality of magnetic disks mounted coaxially on said spindle, said disks having recording surfaces on which data tracks are formed; at least one pair of pivotable post structures positioned 180* apart, aligned parallel to and spaced equally from said spindle axis; a multiplicity of multi-element head assemblies mounted to said post structures, each head assembly having a like number of transducing elements that are aligned radially relative to a respective disk surface, when the post structure is fixed for file operation and data signal transducing; the transducing elements of one post structure and those of the other post structure of said one pair being diametrically opposed and in transducing relation with the same data tracks to provide parallel data signal operation so that faster access is achieved; said post structures being pivotable so that said head assemblies may be moved away and precisely back to the same positions such that said transducing elements are accurately aligned with the same data tracks as prior to rotation of the post structures.
Claim 2
Dependent Claim
191 words
A fixed head magnetic disk storage file comprising: a housing; a drive spindle defining a rotational axis positioned in said housing; a plurality of magnetic disks mounted coaxially on said spindle, said disks having recording surfaces on which data tracks are formed; at least one pair of pivotable post structures positioned 180* apart, aligned parallel to and spaced equally from said spindle axis; a multiplicity of multi-element head assemblies mounted to said post structures, each head assembly having a like number of transducing elements that are aligned radially relative to a respective disk surface, when the post structure is fixed for file operation and data signal transducing; the transducing elements of one post structure and those of the other post structure of said one pair being diametrically opposed and in transducing relation with the same data tracks to provide parallel data signal operation so that faster access is achieved; said post structures being pivotable so that said head assemblies may be moved away and precisely back to the same positions such that said transducing elements are accurately aligned with the same data tracks as prior to rotation of the post structures.
Claim 3
Dependent Claim
70 words
A magnetic disk storage file as in claim 1, wherein two pairs of post structures are provided, each structure being spaced 90* apart from the adjacent structures, and circumferentially around said spindle axis, and a like number of multi-element head assemblies mounted to each post structure, so that each disk surface coacts in transducing relation with at least four multi-head assemblies that are circumferentially and equally spaced about said axis.
Claim 4
Dependent Claim
42 words
A magnetic disk storage file as in claim 2, wherein the transducing elements mounted to one post structure are positioned over one set of data tracks and the transducing elements mounted to adjacent post structures are positioned over alternate interleaved data tracks.
Claim 5
Dependent Claim
30 words
In a magnetic disk storage file as in claim 1, wherein said head assemblies are aligned in columns over said tracks, substantially parallel to the axis of said drive spindle.
Claim 6
Dependent Claim
36 words
In a magnetic disk storage file as in claim 1, further including a number of racks, each rack carrying a plurality of said head assemblies and transducing elements, said racks being fastened to said post structures.
Claim 7
Dependent Claim
31 words
In a magnetic disk storage file as in claim 1, including a pivot bearing assembly coupled to said housing and to said post structures, providing a pivot for said post structures.
Claim 8
Dependent Claim
60 words
In a magnetic disk storage file as in claim 1, further including common circuit means, and electrical connector means coupled to said multiplicity of magnetic head assemblies, said connector means coupling all of said head assemblies to said circuit means, so that selected ones of said transducing elements may be operative with said common circuit means at a given time.
Claim 9
Dependent Claim
58 words
In a magnetic disk storage file as in claim 7, wherein said common circuit means is mounted to said post structures; and including a logic selection circuit coupled to said head assemblies, so that any ones of said transducing elements may be selected to be energized and form a closed circuit path in conjunction with said circuit means.
Claim 10
Dependent Claim
39 words
In a magnetic disk storage file as in claim 1, the combination further including refrigeration and filtration means, providing an air flow and cooling through the disk area, thereby maintaining a clean air environment and a substantially constant temperature.
Claim 11
Dependent Claim
85 words
In a magnetic disk storage file as in claim 9, further including an enclosure for said file, said disks and head assemblies being dIsposed within said enclosure; closed loop means coupled to said enclosure for exhausting air from the area of said disks; and temperature control means for maintaining the air within said enclosure at a substantially constant temperature, said closed loop means providing a positive air flow outwardly from said enclosure to ambient air when said enclosure is opened, to prevent entry of contaminants.
Claim 12
Dependent Claim
38 words
In a magnetic disk storage file as in claim 1, wherein said post structures include air vents providing access for air flow to said head assemblies, so that said head assemblies fly in relation to said rotary disks.
Claim 13
Dependent Claim
37 words
In a magnetic disk storage file as in claim 1, including a hub tool providing alignment means for said post structures relative to the axis of said drive spindle, said hub tool being rotatable with said spindle.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |