US3633185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-wall domain generator
Assignee: AT&T Inc
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Filing: 1970-05-22
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Granted: 1972-01-04
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Expires: 1990-05-22
Abstract
Abstract A magnetically soft overlay element on a material in which single-wall domains can be moved is designed to generate singlewall domains in response to a magnetic field reorienting in the plane of the material. An auxiliary overlay element is positioned with respect to the generator to allow domain interaction to enhance the generator margins.
Inventors
- 👤 Irynej Danylchuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:35
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0858; H; H03; H03K; H03K3/00; H03K3/02; H03K3/45; H03K3/455
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A magnetic domain generator comprising a sheet of material in which single-wall domains can be moved, a magnetically soft overlay adjacent said sheet, said overlay comprising elements having geometries to generate changing magnetic pole patterns in response to a reorienting magnetic field in the plane of said sheet, means for generating said reorienting magnetic field, first and one of a plurality of said second of said elements having shapes and being disposed to provide poles moving in different directions in a manner to attract and thus stretch a domain in response to said reorienting field, a third of said elements having a geometry and being disposed such that a domain moving about the periphery thereof in response to said reorienting field interacts in a manner to divide a domain stretched in response to said field between said first and said first one of said second elements.
Claim 2
Dependent Claim
146 words
A magnetic domain generator comprising a sheet of material in which single-wall domains can be moved, a magnetically soft overlay adjacent said sheet, said overlay comprising elements having geometries to generate changing magnetic pole patterns in response to a reorienting magnetic field in the plane of said sheet, means for generating said reorienting magnetic field, first and one of a plurality of said second of said elements having shapes and being disposed to provide poles moving in different directions in a manner to attract and thus stretch a domain in response to said reorienting field, a third of said elements having a geometry and being disposed such that a domain moving about the periphery thereof in response to said reorienting field interacts in a manner to divide a domain stretched in response to said field between said first and said first one of said second elements.
Claim 3
Dependent Claim
29 words
A generator in accordance with claim 1 wherein said means for generating said reorienting field comprises means for generating a magnetic field rotating in the plane of said sheet.
Claim 4
Dependent Claim
31 words
A generator in accordance with claim 2 also comprising means for inhibiting the poles of a first of said second element in a manner to prevent the stretching of a domain.
Claim 5
Dependent Claim
20 words
A generator in accordance with claim 3 wherein said means for inhibiting comprises means for generating a localized magnetic field.
Claim 6
Dependent Claim
26 words
A generator in accordance with claim 3 wherein each of said first and Third elements has a single wall domain permanently associated with the peripheries thereof.
References Cited (Backward Citations)
US3555527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |