US3727199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static magnetic memory system
Assignee: Signals Galaxies Inc
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Filing: 1971-04-20
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Granted: 1973-04-10
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Expires: 1991-04-20
Abstract
Abstract A magnetic memory element is disclosed along with a process for producing such elements in plurality to constitute a static magnetic memory or digital information storage system. Individual binary storage members are afforded directionally preferential magnetic characteristics by flux circuits to establish the preferred axis of magnetization. Conductors for driving the individual binary storage members (for storing and sensing) are provided in an organized pattern to accomplish selectivity. A batch-production process is also disclosed.
Inventors
- 👤 C Lekven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:57
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06085
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A magnetic memory element comprising: a planar magnetic unit of substantially isotropic material, and having a characteristic of residual magnetism; magnetic circuit means positioned adjacent to said magnetic unit such that first and second different axes of magnetic flux orientation extending in, and parallel to the plane of said unit, have dissimilar magnetic characteristics, said first axis defining an energy state for magnetic flux that is lower than said second axis; means for magnetically driving said magnetic unit to provide magnetic flux oriented along said first axis to register binary data, and to revolve the axis of magnetic flux orientation from substantial alignment with said first axis to an axis in substantial alignment with said second axis; and means for sensing magnetic variations in said unit to indicate registered information.
Claim 2
Dependent Claim
130 words
A magnetic memory element comprising: a planar magnetic unit of substantially isotropic material, and having a characteristic of residual magnetism; magnetic circuit means positioned adjacent to said magnetic unit such that first and second different axes of magnetic flux orientation extending in, and parallel to the plane of said unit, have dissimilar magnetic characteristics, said first axis defining an energy state for magnetic flux that is lower than said second axis; means for magnetically driving said magnetic unit to provide magnetic flux oriented along said first axis to register binary data, and to revolve the axis of magnetic flux orientation from substantial alignment with said first axis to an axis in substantial alignment with said second axis; and means for sensing magnetic variations in said unit to indicate registered information.
Claim 3
Dependent Claim
30 words
A magnetic memory element according to claim 1 wherein said magnetic unit comprises a shape to provide said first and second axes of magnetic flux orientation of substantially equal length.
Claim 4
Dependent Claim
36 words
A magnetic memory element according to claim 1 wherein said magnetic unit, said magnetic circuit means, said means for driving and said means for sensing each is substantially flat and in planar relationship with said unit.
Claim 5
Dependent Claim
38 words
A magnetic memory element according to claim 1 wherein said means for magnetically driving comprises first electrical conductor means and said means for sensing comprises second electrical conductor means in space quadrature to said first electrical conductor means.
Claim 6
Dependent Claim
21 words
A magnetic memory element according to claim 1 wherein said magnetic unit comprises a thin member of substantially isotropic magnetic material.
Claim 7
Dependent Claim
49 words
A magnetic memory element according to claim 5, wherein said means for magnetically driving comprises first electrical conductor means and said means for sensing comprises second electrical conductor means in space quadrature to said first electrical conductor means, and further includes drive circuits for energizing said electrical conductor means.
Claim 8
Dependent Claim
89 words
A planar magnetic memory structure, comprising: a base member of electrically insulating material defining a substantially flat surface; a plurality of discrete planar units of substantially isotropic, residual magnetic material supported on said flat surface; means affixed to said base member including a unitary flat sheet of low reluctance magnetic material for providing magnetic circuits to produce directional magnetic characteristics for said planar units in the plane thereof; and conductor means extending parallel to said planar units to selectively drive and sense magnetic variations in said discrete planar units.
Claim 9
Dependent Claim
89 words
A planar magnetic memory structure, comprising: a base member of electrically insulating material defining a substantially flat surface; a plurality of discrete planar units of substantially isotropic, residual magnetic material supported on said flat surface; means affixed to said base member including a unitary flat sheet of low reluctance magnetic material for providing magnetic circuits to produce directional magnetic characteristics for said planar units in the plane thereof; and conductor means extending parallel to said planar units to selectively drive and sense magnetic variations in said discrete planar units.
Claim 10
Dependent Claim
21 words
A magnetic memory structure according to claim 7 wherein said conductor means includes drive conductors extending substantially in space quadrature relationship.
Claim 11
Dependent Claim
40 words
A planar magnetic memory structure according to claim 7 wherein said means affixed to said base member include means to produce magnetic circuits for said planar units to accommodate magnetic flux along a single axis parallel to said planar units.
Claim 12
Dependent Claim
33 words
A planar magnetic memory structure according to claim 9 wherein said conductor means include means for rotationally displacing the orientation of magnetic flux in said planar units and means for sensing such displacement.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |