US3646530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Input gate arrangement for domain wall device
Assignee: AT&T Inc
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Filing: 1970-09-30
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Granted: 1972-02-29
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Expires: 1990-09-30
Abstract
Abstract A first multistage domain shift register, of the type in which a domain is moved along a rail which defines the register, is employed in an input gate arrangement for an autonomous line scanner. Information in such a register is represented by a domain in one of two possible positions laterally displaced with respect to one another to a first and second side of the rail in each stage. A second rail parallels the first and is responsive to input (off-hook) signals to determine the lateral positions of domains there for interaction with and thus for determination of the lateral positions of domains in the first register.
Inventors
- 👤 Woo Foung Chow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:44
CPC Classifications
H; H04; H04Q; H04Q3/00; G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0858; H03; H03K; H03K17/00; H03K17/51; H03K17/80; H03K17/84
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
137 words
A combination comprising a sheet of material in which single wall domains can be moved, a first rail energy coupled to said sheet extending between input and output positions, means for moving domains along said first rail from stage to stage from said input to said output position, said first rail having properties and a first geometry to define a stable position for a domain to first and second sides thereof in each of said stages, said first rail including a portion extending over a plurality of stages therealong and having a second geometry to permit domains to be moved thereacross in the presence of control domains, and control means for selectively providing a control domain at each stage of said first portion in a manner to move domains across said first rail at said portion selectively.
Claim 2
Dependent Claim
137 words
A combination comprising a sheet of material in which single wall domains can be moved, a first rail energy coupled to said sheet extending between input and output positions, means for moving domains along said first rail from stage to stage from said input to said output position, said first rail having properties and a first geometry to define a stable position for a domain to first and second sides thereof in each of said stages, said first rail including a portion extending over a plurality of stages therealong and having a second geometry to permit domains to be moved thereacross in the presence of control domains, and control means for selectively providing a control domain at each stage of said first portion in a manner to move domains across said first rail at said portion selectively.
Claim 3
Dependent Claim
93 words
A combination in accordance with claim 1 wherein said control means comprises a second rail also having properties and a geometry to define stable positions to first and second sides thereof, said second rail being spaced apart from said first portion a distance to cause domains to move across said first portion in the presence of domains occupying corresponding positions to the second side of said second rail, and a plurality of electrical conductors coupled to said sheet along said second rail for moving domains between first and second sides thereof when pulsed.
Claim 4
Dependent Claim
17 words
A combination in accordance with claim 2 wherein each of said rails comprises a magnetically soft film.
Claim 5
Dependent Claim
18 words
A combination in accordance with claim 2 wherein each of said rails comprises a groove in said sheet.
Claim 6
Dependent Claim
17 words
A combination in accordance with claim 1 including input means for providing domains at said input position.
Claim 7
Dependent Claim
27 words
A combination in accordance with claim 3 wherein said first rail has a closed loop configuration for recirculating domains thereabout thereby providing domains at said input position.
Claim 8
Dependent Claim
155 words
A combination comprising a sheet of material in which single wall domains can be moved between input and output positions, a first rail adjacent said sheet and extending between said input and output positions, said rail having a first portion, a second rail adjacent said first portion, each of said first and second rails having properties and a thickness and width to define a stable location for a single wall domain to either side thereof, means for moving domains through a sequence of stages along a first or a second side of said first rail into said first portion, and means for selectively moving domains from said first to said second side of said second rail, said first portion being disposed and having an enlarged width to permit movement of domains from said first to said second side thereof in the presence of domains in corresponding positions to the second side of said second rail.
Claim 9
Dependent Claim
155 words
A combination comprising a sheet of material in which single wall domains can be moved between input and output positions, a first rail adjacent said sheet and extending between said input and output positions, said rail having a first portion, a second rail adjacent said first portion, each of said first and second rails having properties and a thickness and width to define a stable location for a single wall domain to either side thereof, means for moving domains through a sequence of stages along a first or a second side of said first rail into said first portion, and means for selectively moving domains from said first to said second side of said second rail, said first portion being disposed and having an enlarged width to permit movement of domains from said first to said second side thereof in the presence of domains in corresponding positions to the second side of said second rail.
Claim 10
Dependent Claim
19 words
A combination in accordance with claim 7 wherein each of said rails comprises a film of magnetically soft material.
Claim 11
Dependent Claim
18 words
A combination in accordance with claim 8 wherein each of said rails comprises a groove in said sheet.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |