Patent US1715593A successfully refreshed from Google Patents.
Patent US3828330A successfully refreshed from Google Patents.
US3828330A
Expired / Lapsed
US
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Cylindrical domain progation pattern
Assignee: Siemens AG
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Filing: 1973-01-19
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Granted: 1974-08-06
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Expires: 1993-01-19
Abstract
Abstract A magnetic storage device of the so-called cylindrical domain type, employing a layer of magnetic garnet or magnetic orthoferrite, has a manipulation pattern composed of a nickeliron alloy applied thereto in a predeterined pattern to define paths along which the cylindrical domains may be shifted, under the influence of a magnetic field rotating in the plane of the layer. The pattern is formed of elongate rectangular elements, which are disposed at an angle of 45* relative the direction of the paths taken by the cylindrical domains, and the elongate pattern elements overlap or cross each other, in scissors fashion, allowing the use of a rotating magnetic field of higher frequency.
Inventors
- 👤 F Parzefall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:18
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883; G11C19/0808; G11C19/0816
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
In a magnetic storage device having a medium formed of a layer of magnetic material capable of forming cylindrical magnetic domains magnetized perpendicularly to the plane of said layer, and opposite to the magnetization of the surrounding material in said layer, and a rotating magnetic field rotating in the plane of said layer; a manipulation pattern formed of magnetizable material arranged in a plane juxtaposed with said layer to establish a path in said layer along which said domains may be moved under the influence of said rotating magnetic field, said manipulation pattern being formed of a plurality of individual elements elongate in form and arranged on both sides of said path, said elements all extending from said path at angles of approximately 45* relative to the direction of said path, said elements crossing each other on one side of said path in scissors-like fashion continuously along said path.
Claim 2
Dependent Claim
149 words
In a magnetic storage device having a medium formed of a layer of magnetic material capable of forming cylindrical magnetic domains magnetized perpendicularly to the plane of said layer, and opposite to the magnetization of the surrounding material in said layer, and a rotating magnetic field rotating in the plane of said layer; a manipulation pattern formed of magnetizable material arranged in a plane juxtaposed with said layer to establish a path in said layer along which said domains may be moved under the influence of said rotating magnetic field, said manipulation pattern being formed of a plurality of individual elements elongate in form and arranged on both sides of said path, said elements all extending from said path at angles of approximately 45* relative to the direction of said path, said elements crossing each other on one side of said path in scissors-like fashion continuously along said path.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1 wherein said manipulation pattern is formed to provide a path in the form of a closed loop.
Claim 4
Dependent Claim
43 words
Apparatus according to claim 2 wherein said gate means comprises an elongate electrical conductor forming a loop arranged in a plane juxtaposed with said layer, said loop being aligned with a location intermediate between two paths which may be followed by said domains.
Claim 5
Dependent Claim
39 words
Apparatus according to claim 1, wherein the elements disposed on the opposite side of said path are arranged in individual crossed pairs, one pair of scissors-like elements being provided on said one side for each of said crossed pairs.
Claim 6
Dependent Claim
12 words
Apparatus according to claim 1, wherein said elements are rectangular in shape.
Claim 7
Dependent Claim
42 words
Apparatus according to claim 1, wherein said elements are arranged to form a plurality of said paths, some of said elements being disposed with one end in alignment with a first path and the opposite end in alignment with a second path.
Claim 8
Dependent Claim
17 words
Apparatus according to claim 1, wherein said elements cross each other at an angle of approximately 90*.
Claim 9
Dependent Claim
43 words
Apparatus according to claim 1, wherein the elements disposed on said one side of said path cross other elements disposed on said one side, and the elements disposed on the opposite side of said path cross other elements disposed on said opposite side.
Claim 10
Dependent Claim
38 words
Apparatus according to claim 1 including gate means juxtaposed with said manipulation pattern and adapted to selectively switch magnetic domains from an in-coming path to one of two out-going paths, in response to the condition of the gate.
References Cited (Backward Citations)
US3518643A
Cited
US3534347A
Cited
US3541534A
Cited
US3713119A
Cited
US3713116A
Cited
US3729726A
Cited
US3713117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |