US3760386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic domain logic decoder
Assignee: AG Communication Systems Corp
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Filing: 1972-07-27
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Granted: 1973-09-18
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Expires: 1992-07-27
Abstract
Abstract Gate for directing propagation of bubble domains entering an intersection of propagation channels comprises a pair of closed loop channels, one within the other, the outer loop having a bubble-holding position adjacent said intersection. Selection of one channel at the intersection is made by transferring bubbles from the inner to the outer loop, causing a bubble to be positioned adjacent said intersection, thus deflecting a bubble entering the intersection into the desired route.
Inventors
- 👤 F Quadri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:19
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
203 words
A magnetic domain propagation system comprising a ferromagnetic sheet in which a bubble domain can be propagated, means for producing in said sheet a rotating magnetic field, first and second propagation channels along which said bubble domain can travel, said channels meeting in an intersection, said propagation channels comprising a plurality of permalloy elements appropriately arranged on said sheet to move said bubble therealong by selective magnetic attraction and repulsion between said bubble and magnetic poles induced in said elements by said rotating magnetic field; and gate means arranged at said intersection for selecting either of said propagation channels, said gate means comprising: a first closed loop bubble channel formed of said permalloy elements, said loop having a plurality of bubble-holding positions, including at least one adjacent said intersection; a second closed loop bubble channel within said first loop, said second loop having at least as many bubble-holding positions as said first loop; and means for transferring bubbles between said first and second loops, said gate serving to direct a bubble into said first propagation channel when all bubble-holding positions in said first closed loop channel are occupied by bubbles, and into said second channel when said first loop is devoid of bubbles.
Claim 2
Dependent Claim
203 words
A magnetic domain propagation system comprising a ferromagnetic sheet in which a bubble domain can be propagated, means for producing in said sheet a rotating magnetic field, first and second propagation channels along which said bubble domain can travel, said channels meeting in an intersection, said propagation channels comprising a plurality of permalloy elements appropriately arranged on said sheet to move said bubble therealong by selective magnetic attraction and repulsion between said bubble and magnetic poles induced in said elements by said rotating magnetic field; and gate means arranged at said intersection for selecting either of said propagation channels, said gate means comprising: a first closed loop bubble channel formed of said permalloy elements, said loop having a plurality of bubble-holding positions, including at least one adjacent said intersection; a second closed loop bubble channel within said first loop, said second loop having at least as many bubble-holding positions as said first loop; and means for transferring bubbles between said first and second loops, said gate serving to direct a bubble into said first propagation channel when all bubble-holding positions in said first closed loop channel are occupied by bubbles, and into said second channel when said first loop is devoid of bubbles.
Claim 3
Dependent Claim
13 words
The system of claim 1 wherein said permalloy elements are T''s and I-bars.
Claim 4
Dependent Claim
38 words
The system of claim 1 wherein said transfer means between inner and outer loops comprises a bubble propagation channel between said loops and means for actuating a transfer of bubbles from said propagation channels to said transfer channels.
Claim 5
Dependent Claim
52 words
The system of claim 3 wherein said transfer actuation means comprises a permalloy element adjacent a closed loop channel, and an electrical coil associated with said element, said element being energized by passage of a current through said coil to deflect a bubble from said loop propagation channel into said transfer channel.
Claim 6
Dependent Claim
47 words
The system of claim 1 including a bubble generator and a plurality of shift registers, one shift register being associated with each of said propagation channels, the output of said bubble generator being directed to a selected one of said shift registers by actuation of said gate.
Claim 7
Dependent Claim
59 words
The system of claim 1 including a bubble generator, a first shift register fed by said bubble generator, the output of said bubble generator being connected to said intersection, said first and second progagation channels being connected to second and third shift registers, the selection between said second and third shift registers being controlled by actuation of said gate.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |