US4139906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch for fault tolerant bubble domain memory systems
Assignee: Boeing North American Inc
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Filing: 1977-12-01
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Granted: 1979-02-13
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Expires: 1997-12-01
Abstract
Abstract There is provided an improved switching arrangement for controlling the interaction of magnetic bubble domain propagation loops in order to provide a large, serial storage loop which is fault tolerant and has improved operating characteristics. The switch provides on-chip correction capability and, as well, enhanced switching capability to render defective loops or propagation path portions separable in a positive manner.
Inventors
- 👤 Thomas T. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:39
CPC Classifications
G; G11; G11C; G11C29/00; G11C29/70; G11C29/86; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883; H; H03; H03K; H03K17/00; H03K17/51; H03K17/80; H03K17/84
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
A magnetic bubble domain device system comprising, first propagation path means for magnetic bubble domains, second propagation path means coupled to a first location in said first propagation path means and disposed adjacent to a second location in said first propagation path means. third propagation path means coupled to a third location in said first propagation path means and disposed adjacent to a fourth location in said first propagation path means, and conductor means including a closed loop, a first portion of said closed loop associated with said second propagation path means and said second location in said first propagation path means, a second portion of said closed loop associated with said third propagation path means and said fourth location in said first propagation path means, a third portion of said closed loop spaced apart from all of said propagation path means.
Claim 2
Dependent Claim
142 words
A magnetic bubble domain device system comprising, first propagation path means for magnetic bubble domains, second propagation path means coupled to a first location in said first propagation path means and disposed adjacent to a second location in said first propagation path means. third propagation path means coupled to a third location in said first propagation path means and disposed adjacent to a fourth location in said first propagation path means, and conductor means including a closed loop, a first portion of said closed loop associated with said second propagation path means and said second location in said first propagation path means, a second portion of said closed loop associated with said third propagation path means and said fourth location in said first propagation path means, a third portion of said closed loop spaced apart from all of said propagation path means.
Claim 3
Dependent Claim
21 words
The system recited in claim 1 wherein said first and third locations in said first propagation path means comprise merge devices.
Claim 4
Dependent Claim
22 words
The system recited in claim 1 wherein said second and fourth locations in said first propagation path means comprise transfer switch devices.
Claim 5
Dependent Claim
24 words
The system recited in claim 1 wherein said third portion of said closed loop is selectively removed to alter the operation of the system.
Claim 6
Dependent Claim
52 words
The system recited in claim 4 wherein said second and third propagation path means are ineffective to propagate magnetic bubbles when said third portion of said closed loop is intact, and said second and third propagation path means propagate magnetic bubbles therealong when said third portion of said closed loop is removed.
Claim 7
Dependent Claim
51 words
The system recited in claim 1 wherein said first propagation path means comprises an elongated path for magnetic bubble domains, each of said second and third propagation path means selectively short circuits a portion of said first propagation path means whereby defects in said first propagation path means can be avoided.
References Cited (Backward Citations)
US4075709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |