US3810133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic domain replicator arrangement
Assignee: AT&T Inc
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Filing: 1972-11-24
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Granted: 1974-05-07
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Expires: 1992-11-24
Abstract
Abstract A magnetic bubble replicate arrangement, when defined by magnetically soft elements which are very closely spaced with respect to one another, provides a variety of advantages such as enhanced operating margins and permits a more flexible memory organization.
Inventors
- 👤 A Bobeck
- 👤 I Danylchuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:51
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0858; G11C19/0866; G11C19/0883
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
139 words
A magnetic arrangement comprising a layer of material in which single wall domains can be moved, a fine-grained periodic pattern of elements for defining first and second channels for domains in said layer, said channels being closely spaced at a replicate position, said elements being operative in response to a magnetic field reorienting in the plane of said layer to move domains in said first and second channels in first and second opposite directions respectively with respect to an axis through said replicate position, an electrical conductor coupled to said layer at said replicate position along said axis for stripping out a domain therealong between said first and second channels and for cutting said stripped out domain in response to first and second pulses when said in-plane field reorients to advance domains further along said first and second channels.
Claim 2
Dependent Claim
139 words
A magnetic arrangement comprising a layer of material in which single wall domains can be moved, a fine-grained periodic pattern of elements for defining first and second channels for domains in said layer, said channels being closely spaced at a replicate position, said elements being operative in response to a magnetic field reorienting in the plane of said layer to move domains in said first and second channels in first and second opposite directions respectively with respect to an axis through said replicate position, an electrical conductor coupled to said layer at said replicate position along said axis for stripping out a domain therealong between said first and second channels and for cutting said stripped out domain in response to first and second pulses when said in-plane field reorients to advance domains further along said first and second channels.
Claim 3
Dependent Claim
32 words
An arrangement in accordance with claim 1 including means for applying to said conductor pulses of first and second polarities for stripping out a domain and for cutting said stripped-out domain, respectively.
Claim 4
Dependent Claim
17 words
An arrangement in accordance with claim 2 wherein said conductor and said elements comprise the same material.
Claim 5
Dependent Claim
12 words
An arrangement in accordance with claim 3 wherein said material is permalloy.
Claim 6
Dependent Claim
32 words
An arrangement in accordance with claim 1 wherein said patterns of said first and second channels are shifted one-half period with respect to one another about an axis through said replicate position.
Claim 7
Dependent Claim
28 words
An arrangement in accordance with claim 5 wherein the elements of said first and second channels are adapted to move domains in said opposite directions from said axis.
Claim 8
Dependent Claim
42 words
An arrangement in accordance with claim 6 wherein said conductor is aligned with said axis and is operative to strip out a domain along said axis between said first and second channels there when pulsed with a pulse of a first polarity.
Claim 9
Dependent Claim
26 words
An arrangement in accordance with claim 7 wherein said conductor is operative to cut said strippedout domain in response to a pulse of a second polarity.
Claim 10
Dependent Claim
14 words
An arrangement in accordance with claim 8 wherein said elements are of chevron geometry.
Claim 11
Dependent Claim
17 words
An arrangement in accordance with claim 9 wherein said channels comprise closed loops for recirculating information thereabout.
Claim 12
Dependent Claim
41 words
An arrangement in accordance with claim 10 also including a plurality of said second channels of closed loop form each being closely spaced with respect to a different position of said first channel for forming a plurality of replicate positions therealong.
Claim 13
Dependent Claim
19 words
An arrangement in accordance with claim 11 wherein said conductor couples said plurality of replicate positions electrically in series.
Claim 14
Dependent Claim
19 words
An arrangement in accordance with claim 11 also including means for clearing domains stripped out in said replicate positions.
Claim 15
Dependent Claim
49 words
An arrangement in accordance with claim 13 wherein said means for clearing comprises means for applying to said conductor a pulse of said second polarity prior to the reorientation of said in-plane field from a direction of that field during which said pulse of said first polarity is applied.
Claim 16
Dependent Claim
14 words
An arrangement in accordance with claim 14 wherein said conductor is of hairpin-shaped geometry.
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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |