Patent US3701128A successfully refreshed from Google Patents.
US3701128A
Expired / Lapsed
US
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Detector for magnetic domain arrangement
Assignee: AT&T Inc
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Filing: 1971-06-30
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Granted: 1972-10-24
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Expires: 1991-06-30
Abstract
Abstract A magnetoresistance detector for single wall domains exhibits particularly attractive properties if a captive domain is permanently associated with the element which has its resistance varied in the presence of an information representative domain. The latter domain varies the position of the captive domain. The arrangement relieves the constraints on positioning and alignment of a plurality of detectors as might be required for multiple channel domain propagation arrangements.
Inventors
- 👤 John Alexander Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:00
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/80; H03K17/84; G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0866
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
95 words
A single wall domain arrangement comprising a layer of material in which single wall domains can be moved, a pattern of magnetically soft elements for defining a propagation channel in said layer, an additional magnetically soft element adjacent said path, means for applying an electrical signal to said additional element, a relay single wall domain coupled to said additional element, said additional element and said domain coupled thereto being disposed such that a domain being moved along said channel moves said relay domain in a manner to alter the electrical resistance of said additional element.
Claim 2
Dependent Claim
95 words
A single wall domain arrangement comprising a layer of material in which single wall domains can be moved, a pattern of magnetically soft elements for defining a propagation channel in said layer, an additional magnetically soft element adjacent said path, means for applying an electrical signal to said additional element, a relay single wall domain coupled to said additional element, said additional element and said domain coupled thereto being disposed such that a domain being moved along said channel moves said relay domain in a manner to alter the electrical resistance of said additional element.
Claim 3
Dependent Claim
120 words
A magnetoresistive detector arrangement for detectinG the presence or absence of a domain in a domain propagation channel comprising a layer of material in which domains can be moved, means for moving domains along said channel, a magnetoresistive element spaced apart from said channel a distance such that the magnetization of said element is only negligibly affected by a domain moved in said channel, and first and second electrical connections to said element, wherein said arrangement includes means for maintaining a captive single wall domain in said layer coupled to said magnetoresistive element in a manner such that a domain moved in said channel interacts with said captive domain to rotate the magnetization thereof with respect to said magnetoresistive element.
Claim 4
Dependent Claim
120 words
A magnetoresistive detector arrangement for detectinG the presence or absence of a domain in a domain propagation channel comprising a layer of material in which domains can be moved, means for moving domains along said channel, a magnetoresistive element spaced apart from said channel a distance such that the magnetization of said element is only negligibly affected by a domain moved in said channel, and first and second electrical connections to said element, wherein said arrangement includes means for maintaining a captive single wall domain in said layer coupled to said magnetoresistive element in a manner such that a domain moved in said channel interacts with said captive domain to rotate the magnetization thereof with respect to said magnetoresistive element.
Claim 5
Dependent Claim
24 words
A magnetoresistive detector in accordance with claim 2 wherein said magnetoresistive element has a magnetization such as to be saturated by said captive domain.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |