Patent US3770978A successfully refreshed from Google Patents.
US3770978A
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Magnetic bubble domain switching device
Assignee: Nortel Networks Technology Corp
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Filing: 1972-06-12
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Granted: 1973-11-06
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Expires: 1992-06-12
Abstract
Abstract A switching device for magnetic bubble domains which can be used to carry out three functions:- AND, duplication and inversion. The device is defined by a magnetizable overlay pattern in which magnetic bubble domains in two main channels can be caused to propagate either along the main channels from input to output or along interconnecting channels from the input on one main channel to the output on the other main channel. Deflection is by interaction positions on a control channel. The number of propagation steps from any input position to any output position is equal. Domain idling positions occur at intersections of any channels.
Inventors
- 👤 W Kluge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:10
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/16; H03K19/168; G; G06; G06F; G06F7/00; G06F7/02; G11; G11C; G11C15/00; G11C15/02; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
A switching device for magnetic bubble domains propagated in a layer of material, the switching device comprising a magnetizable overlay pattern having: first and second main channels each having an input position and an output position; first and second interconnecting channels connected between the respective input positions and opposite output positions of the main channels; a control channel having interaction positions adjacent each of the input positions, the control channel being substantially parallel to the input channels at said interaction positions; and domain idling positions at the crossing of any one of said channels by any other of said channels; the device arranged that a domain at an input position of either of the main channels will be deflected into the respective interconnecting channel by the simultaneous occurrence of a domain at the adjacent interaction position in the control channel, the number of propagation steps from either input positions to either output positions equal in all circumstances.
Claim 2
Dependent Claim
157 words
A switching device for magnetic bubble domains propagated in a layer of material, the switching device comprising a magnetizable overlay pattern having: first and second main channels each having an input position and an output position; first and second interconnecting channels connected between the respective input positions and opposite output positions of the main channels; a control channel having interaction positions adjacent each of the input positions, the control channel being substantially parallel to the input channels at said interaction positions; and domain idling positions at the crossing of any one of said channels by any other of said channels; the device arranged that a domain at an input position of either of the main channels will be deflected into the respective interconnecting channel by the simultaneous occurrence of a domain at the adjacent interaction position in the control channel, the number of propagation steps from either input positions to either output positions equal in all circumstances.
Claim 3
Dependent Claim
38 words
A switching device as claimed in claim 1, the first and second main channels spaced apart in parallel array and crossing over the control channel to extend from said control channel in opposite directions to said output positions.
Claim 4
Dependent Claim
28 words
A switching device as claimed in claim 2, wherein said interconnecting channels extend parallel to each other one on each side of the control channel, in opposite directions.
Claim 5
Dependent Claim
46 words
A switching device as claimed in claim 2, including first and second input channels, the first input channel connected to said first main channel at the input position thereof and the second input channel connected to said second main channel at the input position thereof. >
References Cited (Backward Citations)
US3543255A
Cited
US3638208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |