US3772666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlaced magnetic heads
Assignee: EMC Corp
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Filing: 1972-04-03
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Granted: 1973-11-13
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Expires: 1992-04-03
Abstract
Abstract A magnetic disk memory storage system using fixed recording heads with one or more magnetic storage disks, wherein the recording heads are mounted on one or more arm assemblies, each arm assembly having at least a pair of end portions on each of which head pads having a plurality of recording heads are mounted in a gimballed fashion. The head pads in which the recording heads are embedded are arranged so that the recording heads on each head pad of each end portion have a fixed, interlaced relationship with the recording heads on the head pads of each other end portion of the same arm assembly. Means are further provided for controllably moving the arm assemblies to and away from their fixed operating positions with reference to their associated disk surfaces. The controllable moving means are arranged so that the recording heads are always placed in their correct tracking relationships with their corresponding data tracks when they are moved to their operating positions and so that the recording heads can be safely and reliably moved away from their associated disk surfaces without damage to the heads or to such surfaces.
Inventors
- 👤 M Scholz
- 👤 C Grasso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:47
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B25/00; G11B25/04; G11B25/043; G11B5/00; G11B5/48; G11B5/49; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
140 words
A magnetic disk memory system comprising at least one rotatably mounted magnetic disk adapted to have a plurality of data tracks recorded on a surface thereof; at least one arm assembly station being positioned adjacent said recording disk and including one or more arm assemblies each having at least a pair of end portions, each said arm assembly having a plurality of recording heads mounted on each of said end portions, each of said recording heads corresponding to one of said data tracks on said disk surface; and the plurality of recording heads mounted on each of said end portions of each said arm assembly being fixedly arranged in a radial direction so that they have a fixed, interlaced relationship with respect to the plurality of recording heads mounted on the other end portions of the same said arm assembly.
Claim 2
Dependent Claim
140 words
A magnetic disk memory system comprising at least one rotatably mounted magnetic disk adapted to have a plurality of data tracks recorded on a surface thereof; at least one arm assembly station being positioned adjacent said recording disk and including one or more arm assemblies each having at least a pair of end portions, each said arm assembly having a plurality of recording heads mounted on each of said end portions, each of said recording heads corresponding to one of said data tracks on said disk surface; and the plurality of recording heads mounted on each of said end portions of each said arm assembly being fixedly arranged in a radial direction so that they have a fixed, interlaced relationship with respect to the plurality of recording heads mounted on the other end portions of the same said arm assembly.
Claim 3
Dependent Claim
83 words
A magnetic disk memory system in accordance with claim 1 wherein said one or more arm assemblies are reciprocally movable into and away from fixed operative positions with reference to said data tracks and further including means for controllably moving said one or more arm assemblies into and away from said operative positions so that when said arm assemblies are in said operative positions with reference to said disk, each of said interlaced recording heads is aligned with its said corresponding data track.
Claim 4
Dependent Claim
37 words
A magnetic disk memory system in accordance with claim 1, wherein each of said plurality of recording heads is mounted in a head pad member, said head pad member being flexibly mounted on its corresponding end portion.
Claim 5
Dependent Claim
69 words
A magnetic disk memory system in accordance with claim 3, wherein said arm assembly station includes means for mounting said arm assemblies at said station and further wherein each said arm assembly includes a mounting plate adapted to be mounted to said mounting means; and at least a pair of suspension arms each attached at one end to said mounting plate, the other ends thereof forming said end portions.
Claim 6
Dependent Claim
29 words
A magnetic disk memory storage system in accordance with claim 4 wherein said suspension arms extend from said mounting plate in angularly disposed directions with reference to one another.
Claim 7
Dependent Claim
23 words
A magnetic disk memory storage system in accordance with claim 5 wherein said angularly disposed directions converge toWard one another at preselected angles.
Claim 8
Dependent Claim
92 words
A magnetic disk memory storage system in accordance with claim 4 wherein said recording heads form an air bearing relationship with the surface of said disk when said arm assembly is in an operative position and further including a cross-bar member flexibly attached to said mounting plate adjacent said suspension arms; and means for moving said cross-bar member to contact said suspension arms simultaneously whereby said suspension arms can be lifted from said operative position and the recording heads thereon removed from their air bearing relationship with the surface of said disk.
Claim 9
Dependent Claim
36 words
A magnetic disk memory storage system in accordance wtih claim 7 wherein said cross-bar member moving means includes a cam surface; and a contact element affixed to said cross-bar member for riding on said cam surface.
Claim 10
Dependent Claim
59 words
A magnetic disk memory storage system in accordance with claim 3 wherein said head pad members are each mounted on a spring-like element, each said element having a pair of tabs bonded to a corresponding pair of mounting posts affixed to said suspension arm, whereby said head pad members are positioned in flexible spaced relationships with said suspension arms.
Claim 11
Dependent Claim
27 words
A magnetic disk memory storage system in accordance with claim 9 wherein each said head pad member has 16 recording heads mounted therein in parallel spaced relationships.
Claim 12
Dependent Claim
37 words
A magnetic disk memory system in accordance with claim 2 wherein each of said plurality of recording heads is mounted in a head pad member, said head pad member being flexibly mounted on its corresponding end portion.
Claim 13
Dependent Claim
54 words
A magnetic disk memory system in accordance with claim 11 wherein each said arm assembly includes a mounting plate adapted to be fixedly mounted to said controllable moving means; and at least a pair of suspension arms each attached at one end to said mounting plate, the other ends thereof forming said end portions.
Claim 14
Dependent Claim
29 words
A magnetic disk memory storage system in accordance with claim 12 wherein said suspension arms extend from said mounting plate in angularly disposed directions with reference to one another.
Claim 15
Dependent Claim
23 words
A magnetic disk memory storage system in accordance with claim 13 wherein said angularly disposed directions converge toward one another at preselected angles.
Claim 16
Dependent Claim
92 words
A magnetic disk memory storage system in accordance with claim 14 wherein said recording heads form an air bearing relationship with the surface of said disk when said arm assembly is in its operative position and further including a cross-bar member flexibly attached to said mounting plate adjacent said suspension arms; and means for moving said cross-bar member to contact said suspension arms simultaneously whereby said suspension arms can be lifted from said operative position and the recording heads thereon removed from their air bearing relationship with the surface of said disk.
Claim 17
Dependent Claim
36 words
A magnetic disk memory storage system in accordance with claim 15 wherein said cross-bar member moving means includes a cam surface; and a contact element affixed to said cross-bar member for riding on said cam surface.
Claim 18
Dependent Claim
59 words
A magnetic disk memory storage system in accordance with claim 16 wherein said head pad members are each mounted on a spring-like element, each said element having a pair of tabs bonded to a corresponding pair of mounting posts affixed to said suspension arm, whereby said head pad members are positioned in flexibly spaced relationships with said suspension arms.
Claim 19
Dependent Claim
27 words
A magnetic disk memory storage system in accordance with claim 17 wherein each said head pad member has 16 recording heads mounted therein in parallel spaced relationships.
Claim 20
Dependent Claim
66 words
A magnetic disk memory storage system in accordance with claim 12 wherein said controllable arm assembly moving means includes a shaft; and means for controllably rotating said shaft; said mounting plate having a cut-out portion with a prEselected configuration, said mounting plate being mounted on said shaft at said cut-out portion; and means for keyably mounting said mounting plate to said shaft at said cut-out portion.
Claim 21
Dependent Claim
147 words
A magnetic disk memory storage system in accordance wtih claim 19 wherein the configuration of said cut-out portion is rectangular and said shaft has a flat portion in the region where said mounting plate is to be mounted, which flat portion buttresses against one side of said cut-out portion; and said keyable mounting means includes an opening through said shaft opposite said cut-out portion; an opening in said mounting plate corresponding to and having the same diameter as the said opening through said shaft; a further threadable opening extending from said mounting plate opening and having a reduced diameter; and fastener means having a threadable tip, said fastener means extending through said openings in said shaft and said mounting plate and being threadably secured to said further threaded opening in said mounting plate whereby said arm assembly is fixedly mounted in a preselected relationship with said shaft.
Claim 22
Dependent Claim
93 words
A magnetic disk memory storage system in accordance with claim 19 wherein said means for controllably rotating said shaft includes a motor means having a rotating motor shaft; a rotating disk member affixed to said motor shaft; a projecting member mounted at the end of said arm assembly rotatable shaft adjacent said disk member; solenoid means mounted on said projecting member so that when said solenoid means are actuated said projecting member is magnetically coupled to said disk member so that said arm assembly rotatable shaft is thereby rotated by said motor means.
Claim 23
Dependent Claim
90 words
A magnetic disk memory storage system in accordance with claim 21 and further including a stop element mounted on said projecting member; a first stop member fixedly mounted in a first predetermined spatial relationship with reference to said rotating shaft whereby when said rotatable shaft is rotated to its operative position said stop element buttresses against said first stop member and retains said rotatable shaft in said operative position; and solenoid means for magnetically coupling said stop element and said first stop member when they are in said buttressed relationship.
Claim 24
Dependent Claim
108 words
A magnetic disk memory storage system in accordance with claim 22 and further including a second stop member fixedly mounted in a second predetermined spatial relationship with respect to said rotatable shaft and displaced from said first stop member; spring means fixedly mounted at one end and affixed at its other end to said projecting member so that, when the magnetic coupling between said stop element and said first stop member is removed, said projecting member is rotated to a position where a portion of said projecting member moves into buttressing contact with said second stop member so that said rotatable shaft is placed in a non-operative position.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |