Patent US3772661A successfully refreshed from Google Patents.
US3772661A
Expired / Lapsed
US
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Control system for magnetic bubbles
Assignee: KDDI Corp
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Filing: 1971-03-31
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Granted: 1973-11-13
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Expires: 1991-03-31
Abstract
Abstract A system for controlling magnetic bubbles in a thin magnetic plate comprises a plurality of drive loops disposed in close relationship to the magnetic plate and driven by polyphase drive currents to effect controlled movement of magnetic bubbles contained in the magnetic plate. The drive loops have a hexagonal shape with six sides so that a magnetic bubble may be accepted by each drive loop along one of three possible directions which are spaced apart at 120* intervals and may be transmitted therefrom along one of another three possible directions which are spaced apart at 120* intervals and which are also spaced 60* from respective ones of the first-mentioned three possible directions.
Inventors
- 👤 S Oshima
- 👤 T Watanabe
- 👤 H Ishihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:09
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/16; H03K19/168; G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0808; G11C19/0833; G11C19/0841; G11C19/0875; G11C19/0883; H03K23/00; H03K23/76
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
142 words
A system for controlling magnetic bubbles in a thin magnetic plate by the use of a plurality of drive loops closely disposed to the thin magnetic plate and driven by poly-phase drive currents, the drive loops comprising a pair of drive conductors for each phase of drive current and having at regular intervals therealong widened drive sections each defining one drive loop so that a magnetic bubble caught by one of the drive sections of the drive loops may be transmitted along one of a first three possible directions which are spaced apart at 120* intervals while a magnetic bubble may be accepted by one of the drive sections of the drive loops along one of a second three possible directions which are spaced apart at 120* intervals and which are spaced 60* from respective ones of the first three possible directions.
Claim 2
Independent Claim
142 words
A system for controlling magnetic bubbles in a thin magnetic plate by the use of a plurality of drive loops closely disposed to the thin magnetic plate and driven by poly-phase drive currents, the drive loops comprising a pair of drive conductors for each phase of drive current and having at regular intervals therealong widened drive sections each defining one drive loop so that a magnetic bubble caught by one of the drive sections of the drive loops may be transmitted along one of a first three possible directions which are spaced apart at 120* intervals while a magnetic bubble may be accepted by one of the drive sections of the drive loops along one of a second three possible directions which are spaced apart at 120* intervals and which are spaced 60* from respective ones of the first three possible directions.
Claim 3
Dependent Claim
38 words
A system according to claim 1, wherein each conductor of the drive conductors runs along successive three sides of each of a plurality of hexangle drive sections, whereby the pattern of the drive loops defines a honeycombed pattern.
Claim 4
Dependent Claim
41 words
A system according to claim 2, in which two of said successive three sides of one of said hexangle drive sections are opposed to respective one sides of adjacent two hexangle drive sections driven by a drive current of adjacent phase.
Claim 5
Dependent Claim
22 words
A system according to claim 3, in which respective spaces between two pairs of said opposed sides are different from each other.
Claim 6
Dependent Claim
24 words
A system according to claim 3, in which further comprising means of magnetic substancE for determining a particular transfer direction of each magnetic bubble.
Claim 7
Dependent Claim
29 words
A system according to claim 2, in which a pair of said drive conductors for each phase of drive current comprises independent conductors for each phase of drive current.
Claim 8
Dependent Claim
71 words
A system according to claim 2, in which respective ones of a pair of said drive conductors for each phase of drive current are provided commonly to respective conductors for respective adjacent phases of drive currents, and in which further comprising means for changing combinations of said pair of drive conductors so that each conductor is used for providing adjacent drive sections respectively driven by different drive currents of consecutive phases.
Claim 9
Independent Claim
132 words
A system comprising: a thin magnetic plate in which magnetic bubbles may be introduced and moved; means for moving magnetic bubbles contained in said magnetic plate between a series of stable positions comprising a plurality of drive loops disposed in close proximity to said magnetic plate and cooperative therewith to define therein said series of stable positions, each drive loop having means operative when said drive loop is energized for effecting movement of a magnetic bubble into its corresponding stable position along one of three discrete paths and for effecting movement of the magnetic bubble out of its corresponding position along one of three different discrete paths; and means for selectively energizing said drive loops during operation of the system to effect controlled movement of the magnetic bubble between said stable positions.
Claim 10
Independent Claim
132 words
A system comprising: a thin magnetic plate in which magnetic bubbles may be introduced and moved; means for moving magnetic bubbles contained in said magnetic plate between a series of stable positions comprising a plurality of drive loops disposed in close proximity to said magnetic plate and cooperative therewith to define therein said series of stable positions, each drive loop having means operative when said drive loop is energized for effecting movement of a magnetic bubble into its corresponding stable position along one of three discrete paths and for effecting movement of the magnetic bubble out of its corresponding position along one of three different discrete paths; and means for selectively energizing said drive loops during operation of the system to effect controlled movement of the magnetic bubble between said stable positions.
Claim 11
Dependent Claim
28 words
A system according to claim 8; wherein each drive loop has a polygonal configuration composed of six linear sections each extending perpendicular to one of said discrete paths.
Claim 12
Dependent Claim
25 words
A system according to claim 8; wherein each drive loop comprises a pair of drive conductors collectively defining a nexagonal configuration having six linear sections.
Claim 13
Dependent Claim
48 words
A system according to claim 10; wherein said plurality of drive loops are disposed in an array of mutually adjacent drive loops wherein two of the six linear sections of some drive loops are each opposed to one of the six linear sections of another adjacent drive loop.
Claim 14
Dependent Claim
27 words
A system according to claim 11; wherein the spacing distance between the opposed linear sections of adjacent drive loops is different for some of said drive loops.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |