US4559570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic storage system
Assignee: COMPUSONICS Corp A CO CORP
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Filing: 1984-05-14
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Granted: 1985-12-17
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Expires: 2004-05-14
Abstract
Abstract Disclosed is a magnetic storage system which utilizes a dual planar magnetic disk storage device in combination with a magnetic head assembly having a local tracking device for producing small correctional movements to precisely align the magnetic transducer head to provide high density recording on a magnetic disk and thereby increase the total amount of information stored on the disk. The dual planar magnetic storage disk has magnetic wall regions which are permanently magnetized with either a horizontal or vertical polarity to produce a magnetic wall on each side of the data track. The local tracking device has sensor coils for sensing the location of the magnetic transducer head and reactor coils for producing a reaction coil magnetic field which interacts with either the magnetic wall field or the magnetic head assembly to produce the correctional movements of the local tracking device.
Inventors
- 👤 David M. Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:33
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/012; G11B5/48; G11B5/54; G11B5/55; G11B5/5521
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
251 words
A magnetic storage apparatus capable of storing and retrieving magnetic data in a high density format comprising: magnetic disk storage means for storing said magnetic data comprising: magnetic wall means defining a plurality of predetermined locational information regions on said magnetic disk storage means which are magnetized with a polarity having a first predetermined direction to produce a magnetic wall field; data track means defining a plurality of predetermined horizontal magnetic data storage regions for storing said magnetic data with a polarity having a second predetermined direction which is substantially normal to said first predetermined direction; magnetic head assembly means for storing and retrieving said magnetic data from said data track means comprising: magnetic transducer head means for recording and retrieving said magnetic data stored on said data track means with a polarity in said second predetermined direction; housing means for supporting said magnetic transducer head means; sensor coil means for producing a sensor coil locational signal representative of the location of said magnetic transducer head means relative to said magnetic wall means; means for amplifying said sensor coil locational signal; reaction coil means for adjusting the position of said magnetic transducer head means within said housing means to precisely align said magnetic transducer head means on said data track means by generating a reaction coil magnetic field which interacts with said magnetic wall field to move said magnetic transducer head means in said housing means; support means for positioning said magnetic head assembly means on said magnetic disk storage means.
Claim 2
Dependent Claim
251 words
A magnetic storage apparatus capable of storing and retrieving magnetic data in a high density format comprising: magnetic disk storage means for storing said magnetic data comprising: magnetic wall means defining a plurality of predetermined locational information regions on said magnetic disk storage means which are magnetized with a polarity having a first predetermined direction to produce a magnetic wall field; data track means defining a plurality of predetermined horizontal magnetic data storage regions for storing said magnetic data with a polarity having a second predetermined direction which is substantially normal to said first predetermined direction; magnetic head assembly means for storing and retrieving said magnetic data from said data track means comprising: magnetic transducer head means for recording and retrieving said magnetic data stored on said data track means with a polarity in said second predetermined direction; housing means for supporting said magnetic transducer head means; sensor coil means for producing a sensor coil locational signal representative of the location of said magnetic transducer head means relative to said magnetic wall means; means for amplifying said sensor coil locational signal; reaction coil means for adjusting the position of said magnetic transducer head means within said housing means to precisely align said magnetic transducer head means on said data track means by generating a reaction coil magnetic field which interacts with said magnetic wall field to move said magnetic transducer head means in said housing means; support means for positioning said magnetic head assembly means on said magnetic disk storage means.
Claim 3
Dependent Claim
49 words
The apparatus of claim 1 wherein said means for amplifying said sensor coil location signal is disposed on said magnetic head assembly to reduce propagation time of said sensor coil locational signal to said reaction coil means and increase the response time of movement of said magnetic transducer head.
Claim 4
Dependent Claim
15 words
The apparatus of claim 2 wherein said magnetic head assembly means comprises a monolithic structure.
Claim 5
Dependent Claim
18 words
The apparatus of claim 3 wherein said magnetic transducer head means comprises a thin film micro-gap read/write head.
Claim 6
Dependent Claim
18 words
The apparatus of claim 3 wherein said magnetic transducer head means comprises a ferrite core micro-gap read/write head.
Claim 7
Dependent Claim
25 words
The device of claim 3 wherein said magnetic head assembly further comprises: signal amplification means for amplifying signals transduced by said magnetic transducer head means.
Claim 8
Dependent Claim
42 words
The device of claim 6 wherein said first predetermined direction is substantially parallel to the direction of movement of said magnetic disk storage means and said second predetermined direction is substantially normal to the surface plane of said magnetic disk storage means.
Claim 9
Dependent Claim
42 words
The device of claim 6 wherein said first predetermined direction is substantially normal to the surface plane of said magnetic disk storage means and said second predetermined direction is substantially parallel to said direction of movement of said magnetic disk storage means.
Claim 10
Dependent Claim
18 words
The apparatus of claim 7 wherein said magnetic transducer head means comprises a thin film micro-gap read/write head.
Claim 11
Dependent Claim
18 words
The apparatus of claim 7 wherein said magnetic head assembly means comprises a ferrite core micro-gap read/write head.
Claim 12
Dependent Claim
18 words
The apparatus of claim 8 wherein said magnetic transducer head means comprises a thin film micro-gap read/write head.
Claim 13
Dependent Claim
18 words
The apparatus of claim 8 wherein said magnetic head assembly means comprises a ferrite core micro-gap read/write head.
Claim 14
Dependent Claim
25 words
The device of claim 4 wherein said magnetic head assembly further comprises: signal amplification means for amplifying signals transduced by said magnetic transducer head means.
Claim 15
Dependent Claim
25 words
The device of claim 5 wherein said magnetic head assembly further comprises: signal amplification means for amplifying signals transduced by said magnetic transducer head means.
Claim 16
Dependent Claim
246 words
A magnetic storage apparatus capable of storing and retrieving magnetic data in a high density format comprising: magnetic disk storage means for storing said magnetic data comprising: magnetic wall means defining a plurality of predetermined locational information regions on said magnetic disk storage means which are magnetized with a polarity having a first predetermined direction to produce a magnetic wall field; data track means defining a plurality of predetermined magnetic data storage regions for storing said magnetic data with a polarity having a second predetermined direction which is substantially normal to said first predetermined direction; magnetic head assembly means for storing and retrieving said magnetic data from said data track means comprising: magnetic transducer head means for recording and retrieving said magnetic data stored on said data track means with a polarity in said second predetermined direction; housing means for supporting said magnetic transducer head means; sensor coil means for producing a sensor coil locational signal representative of the location of said magnetic transducer head means relative to said magnetic wall means; means for amplifying said sensor coil locational signal; reaction coil means for adjusting the position of said magnetic transducer head means within said housing means to precisely align said magnetic transducer head means on said data track means by generating a reaction coil magnetic field which interacts with said housing means in response to said sensor coil locational signal; support means for positioning said magnetic head assembly means on said magnetic disk storage means.
Claim 17
Dependent Claim
246 words
A magnetic storage apparatus capable of storing and retrieving magnetic data in a high density format comprising: magnetic disk storage means for storing said magnetic data comprising: magnetic wall means defining a plurality of predetermined locational information regions on said magnetic disk storage means which are magnetized with a polarity having a first predetermined direction to produce a magnetic wall field; data track means defining a plurality of predetermined magnetic data storage regions for storing said magnetic data with a polarity having a second predetermined direction which is substantially normal to said first predetermined direction; magnetic head assembly means for storing and retrieving said magnetic data from said data track means comprising: magnetic transducer head means for recording and retrieving said magnetic data stored on said data track means with a polarity in said second predetermined direction; housing means for supporting said magnetic transducer head means; sensor coil means for producing a sensor coil locational signal representative of the location of said magnetic transducer head means relative to said magnetic wall means; means for amplifying said sensor coil locational signal; reaction coil means for adjusting the position of said magnetic transducer head means within said housing means to precisely align said magnetic transducer head means on said data track means by generating a reaction coil magnetic field which interacts with said housing means in response to said sensor coil locational signal; support means for positioning said magnetic head assembly means on said magnetic disk storage means.
Claim 18
Dependent Claim
49 words
The apparatus of claim 15 wherein said means for amplifying said sensor coil location signal is disposed within said magnetic head assembly to reduce propagation time of said sensor coil locations signal to said reaction coil means and increase the response time of movement of said magnetic transducer head.
Claim 19
Dependent Claim
15 words
The apparatus of claim 16 wherein said magnetic head assembly means comprises a monolithic structure.
Claim 20
Dependent Claim
18 words
The apparatus of claim 17 wherein said magnetic transducer head means comprises a thin film micro-gap read/write head.
Claim 21
Dependent Claim
18 words
The apparatus of claim 17 wherein said magnetic head assembly means comprises a ferrite core micro-gap read/write head.
Claim 22
Dependent Claim
26 words
The device of claim 17 wherein said magnetic head assembly further comprises: a signal amplification means for amplifying signals transduced by said magnetic transducer head means.
Claim 23
Dependent Claim
16 words
The apparatus of claim 20 wherein said reaction coil means are disposed within said housing means.
Claim 24
Dependent Claim
43 words
The device of claim 20 wherein said first predetermined direction is substantially parallel to the plane of movement of said magnetic disk storage means and said second predetermined direction is substantially normal to said plane of movement of said magnetic disk storage means.
Claim 25
Dependent Claim
42 words
The device of claim 20 wherein said first predetermined direction is substantially normal to the surface plane of said magnetic disk storage means and said second predetermined direction is substantially parallel to said direction of movement of said magnetic disk storage means.
Claim 26
Independent Claim
137 words
An apparatus for storing magnetic data comprising: dual planar magnetic disk storage means having a plurality of magnetized wall regions having a predetermined direction of polarity and a plurality of data tracks disposed between said wall regions; magnetic head assembly means for recording and retrieving said magnetic data on said data tracks comprising: magnetic transducer means for reading and writing said magnetic data on said data tracks with a direction of polarity substantially normal to the direction of polarity of said magnetized wall regions; sensor coil means for sensing the location of magnetic transducer means with respect to said magnetized wall regions; reaction coil means for producing a reaction coil magnetic field to adjust the position of said magnetic transducer means in response to the position of said magnetic transducer means sensed by said sensor coil means.
Claim 27
Independent Claim
137 words
An apparatus for storing magnetic data comprising: dual planar magnetic disk storage means having a plurality of magnetized wall regions having a predetermined direction of polarity and a plurality of data tracks disposed between said wall regions; magnetic head assembly means for recording and retrieving said magnetic data on said data tracks comprising: magnetic transducer means for reading and writing said magnetic data on said data tracks with a direction of polarity substantially normal to the direction of polarity of said magnetized wall regions; sensor coil means for sensing the location of magnetic transducer means with respect to said magnetized wall regions; reaction coil means for producing a reaction coil magnetic field to adjust the position of said magnetic transducer means in response to the position of said magnetic transducer means sensed by said sensor coil means.
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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |