US3789373A
Expired / Lapsed
US
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Magnetic, single wall domain, or logic using chevron domain propagating elements
Assignee: AT&T Inc
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Filing: 1972-11-06
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Granted: 1974-01-29
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Expires: 1992-11-06
Abstract
Abstract Magnetic single wall domain expanders in adjacent domain propagation channels are edge-merged into a common detector stage so that a domain from any of the channels is electrically detectable at that stage. A domain compressor provides magnetic output. The channels in one embodiment are control-memory-gated outputs from different stages of a shift register that is operable in a time slot interchanging mode.
Inventors
- 👤 P Bonyhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:21
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/16; H03K19/168; G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0866
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
In combination, means for propagating magnetic single wall domains in separate propagation channels in a substrate of material in which domains can be moved, a first stage chevron pattern of magnetic overlay elements on said substrate, said pattern extending across said channels, and a domain compressor comprising a plurality of additional stages of chevron patterns of magnetic overlay elements on said substrate, said additional patterns being in domain-coupling proximity to one another in a tandem sequence and including in consecutive ones of the patterns in said sequence consecutively decreasing numbers of elements, the largest one of said additional patterns being located in domain-coupling proximity to substantially the full length of said first pattern whereby a domain in any of said channels is coupled to the smallest of said additional chevron patterns.
Claim 2
Dependent Claim
131 words
In combination, means for propagating magnetic single wall domains in separate propagation channels in a substrate of material in which domains can be moved, a first stage chevron pattern of magnetic overlay elements on said substrate, said pattern extending across said channels, and a domain compressor comprising a plurality of additional stages of chevron patterns of magnetic overlay elements on said substrate, said additional patterns being in domain-coupling proximity to one another in a tandem sequence and including in consecutive ones of the patterns in said sequence consecutively decreasing numbers of elements, the largest one of said additional patterns being located in domain-coupling proximity to substantially the full length of said first pattern whereby a domain in any of said channels is coupled to the smallest of said additional chevron patterns.
Claim 3
Dependent Claim
87 words
In combination, means for propagating magnetic single wall domains in separate propagation chanNels, said propagating means comprising chevron pattern forming successive stages of magnetic overlay elements on a substrate of material in which magnetic single wall domains can be moved, a predetermined output signal channel, and means, responsive on an inclusive OR logic basis to magnetic domain signals on said separate channels, for producing an inclusive OR signal on said output channel, said producing means including a chevron element pattern extending across all of said separate channels.
Claim 4
Dependent Claim
87 words
In combination, means for propagating magnetic single wall domains in separate propagation chanNels, said propagating means comprising chevron pattern forming successive stages of magnetic overlay elements on a substrate of material in which magnetic single wall domains can be moved, a predetermined output signal channel, and means, responsive on an inclusive OR logic basis to magnetic domain signals on said separate channels, for producing an inclusive OR signal on said output channel, said producing means including a chevron element pattern extending across all of said separate channels.
Claim 5
Dependent Claim
70 words
The combination in accordance with claim 2 in which said propagating means comprises an input domain propagating channel of plural stages, means, at different ones of said input channel stages, for selectively coupling a domain output from such stages to corresponding ones of said separate channels, and means for activating said selective coupling means to secure a predetermined ordering in said single channel of domains from said input propagating channel.
Claim 6
Dependent Claim
47 words
The combination in accordance with claim 3 in which said selective coupling means comprises means for limiting the number of domains coupled from said input propagation channel so that only one domain can be present in all of said separate channels at any one stage level thereof.
Claim 7
Dependent Claim
47 words
The combination in accordance with claim 2 in which each of said separate channels includes chevron pattern extensions of increasing lateral length in successive ones of said stages whereby channel joining occurs after a plurality of stages of said chevron patterns and prior to said producing means.
Claim 8
Dependent Claim
46 words
The combination in accordance with claim 5 in which said producing means comprises electric circuit means coupled to said pattern extending across all of said channels and, means for operating said electric circuit means to detect the presence of a domain at the last mentioned stage.
Claim 9
Dependent Claim
87 words
The combination in accordance with claim 2 in which said producing means comprises means for compressing magnetic domains and including a sequence of chevron patterns of decreasing transverse dimension, the last mentioned patterns each comprising a plurality of chevron magnetic elements over-layed upon said substrate, the first pattern in the last mentioned sequence being coupled to said pattern extending across all of said chennels, and means, coupled to the last pattern of the last mentioned sequence, for responding to a magnetic single wall domain at that stage.
Claim 10
Dependent Claim
34 words
The combination in accordance with claim 7 in which said domain compressing means further comprises means, adjacent to edges of said sequence of chevron patterns, for eliminating domains propagating laterally out of said sequence.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |