Patent US3832701A successfully refreshed from Google Patents.
US3832701A
Expired / Lapsed
US
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Transfer circuit for single wall domains
Assignee: AT&T Inc
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Filing: 1973-03-28
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Granted: 1974-08-27
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Expires: 1993-03-28
Abstract
Abstract Transfer of a single wall domain from one channel to another is achieved by blocking the path of a domain to its next normal position to a manner to create a temporary path along which the blocked domain adjusts its shape for movement to an alternate position to an alternate channel. A pulse on a properly disposed electrical conductor when formed with permalloy produces the desired operation.
Inventors
- 👤 A Bobeck
- 👤 T Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:16
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
Magnetic apparatus comprising a layer of material in which single wall domains can be moved, a pattern of elements coupled to said layer for defining first and second channels for the movement of domains in opposite directions respectively therealong in response to a magnetic field reorienting in the plane of said layer, first and second ones of those elements in said first and second channels respectively being closely spaced at a transfer position, an electrical conductor of magnetically soft material coupled to said layer and extending between said first and second channels at said transfer position at locations between first and second normal successive domain positions with respect to each of said first and second elements, said conductor when pulsed being operative to block the movement of a domain from a first to the associated second position of said first element and to provide a supportive environment for a domain between said first position of said first element and the second position of said second element as said in-plane field reorients to a direction for moving domains from said first to said second positions.
Claim 2
Dependent Claim
184 words
Magnetic apparatus comprising a layer of material in which single wall domains can be moved, a pattern of elements coupled to said layer for defining first and second channels for the movement of domains in opposite directions respectively therealong in response to a magnetic field reorienting in the plane of said layer, first and second ones of those elements in said first and second channels respectively being closely spaced at a transfer position, an electrical conductor of magnetically soft material coupled to said layer and extending between said first and second channels at said transfer position at locations between first and second normal successive domain positions with respect to each of said first and second elements, said conductor when pulsed being operative to block the movement of a domain from a first to the associated second position of said first element and to provide a supportive environment for a domain between said first position of said first element and the second position of said second element as said in-plane field reorients to a direction for moving domains from said first to said second positions.
Claim 3
Dependent Claim
14 words
Apparatus in accordance with claim 1 wherein said elements and said conductors comprise permalloy.
Claim 4
Dependent Claim
30 words
Apparatus in accordance with claim 2 wherein said elements of said first and second channels are chevron shaped and said first and second elements have geometries inverted from one another.
Claim 5
Dependent Claim
174 words
Magnetic apparatus comprising a layer of material in which single wall domains can be moved, a pattern of elements coupled to said layer for defining first and second chAnnels for the movement of domains in opposite directions respectively therealong in response to a magnetic field reorienting in the plane of said layer, first and second ones of those elements in said first and second channels respectively being closely spaced at a transfer position, an electrical conductor extending between said first and second channels at said transfer position at locations between first and second normal domain positions with respect to each of said first and second elements, said conductor when pulsed being operative to block the movement of a domain from a first to the associated second position of said first element and to provide a supportive environment for a domain between said first position of said first element and the second position of said second element as said in-plane field reorients to a direction for moving domains from said first to said second positions.
Claim 6
Dependent Claim
174 words
Magnetic apparatus comprising a layer of material in which single wall domains can be moved, a pattern of elements coupled to said layer for defining first and second chAnnels for the movement of domains in opposite directions respectively therealong in response to a magnetic field reorienting in the plane of said layer, first and second ones of those elements in said first and second channels respectively being closely spaced at a transfer position, an electrical conductor extending between said first and second channels at said transfer position at locations between first and second normal domain positions with respect to each of said first and second elements, said conductor when pulsed being operative to block the movement of a domain from a first to the associated second position of said first element and to provide a supportive environment for a domain between said first position of said first element and the second position of said second element as said in-plane field reorients to a direction for moving domains from said first to said second positions.
References Cited (Backward Citations)
US3723716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |