US3138787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double triangular array memory drive
Assignee: International Business Machines Corp
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Filing: 1961-08-25
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Granted: 1964-06-23
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Expires: 1981-08-25
Abstract
No abstract record available.
Inventors
- 👤 William P Hanf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:11
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
225 words
A MATRIX COMPRISING A PLURALITY OF CORES ARRANGED IN ROWS AND COLUMNS AND EACH CAPABLE OF BEING SET TO A FIRST OR SECOND STABLE STATE BY A CURRENT THROUGH A WINDING ON EACH SAID CORE, WINDINGS FOR EACH CORE IN EACH ROW OF CORES WOUND SO THAT CURRENT IN A FIRST DIRECTION WILL DRIVE SOME CORES TOWARD A FIRST STABLE STATE AND THE REMAINDER OF SAID CORES TOWARD A SECOND STABLE STATE WHILE CURRENT IN A SECOND DIRECTION WILL PROVIDE AN OPPOSITE DRIVE, WINDINGS FOR EACH CORE IN EACH COLUMN OF CORES WOUND SO THAT CURRENT IN A FIRST DIRECTION WILL DRIVE SOME CORES TOWARD A FIRST STABLE STATE AND THE REMAINDER OF SAID CORES TOWARD A SECOND STABLE STATE AND CURRENT IN A SECOND DIRECTION WILL PROVIDE AN OPPOSITE DRIVE, MEANS FOR CONNECTING THE WINDING FOR EACH ROW TO A WINDING FOR A CORRESPONDING COLUMN, DRIVERS CONNECTED TO SAID ROW WINDINGS TO PROVIDE CURRENT IN A FIRST OR SECOND DIRECTION, AND MEANS FOR CONTROLLING A SELECTED DRIVER TO PROVIDE CURRENT IN A FIRST DIRECTION IN A ROW IN WHICH A CORE IS TO BE SELECTED AND CONTROLLING ANOTHER DRIVER TO PROVIDE CURRENT IN A SECOND DIRECTION THROUGH ANOTHER ROW CONNECTED TO THE COLUMN IN WHICH SAID CORE IS LOCATED, WHEREIN A CORE IN A SELECTED LOCATION MAY BE SET TO A DESIRED STABLE CONDITION.
Claim 2
Dependent Claim
225 words
A MATRIX COMPRISING A PLURALITY OF CORES ARRANGED IN ROWS AND COLUMNS AND EACH CAPABLE OF BEING SET TO A FIRST OR SECOND STABLE STATE BY A CURRENT THROUGH A WINDING ON EACH SAID CORE, WINDINGS FOR EACH CORE IN EACH ROW OF CORES WOUND SO THAT CURRENT IN A FIRST DIRECTION WILL DRIVE SOME CORES TOWARD A FIRST STABLE STATE AND THE REMAINDER OF SAID CORES TOWARD A SECOND STABLE STATE WHILE CURRENT IN A SECOND DIRECTION WILL PROVIDE AN OPPOSITE DRIVE, WINDINGS FOR EACH CORE IN EACH COLUMN OF CORES WOUND SO THAT CURRENT IN A FIRST DIRECTION WILL DRIVE SOME CORES TOWARD A FIRST STABLE STATE AND THE REMAINDER OF SAID CORES TOWARD A SECOND STABLE STATE AND CURRENT IN A SECOND DIRECTION WILL PROVIDE AN OPPOSITE DRIVE, MEANS FOR CONNECTING THE WINDING FOR EACH ROW TO A WINDING FOR A CORRESPONDING COLUMN, DRIVERS CONNECTED TO SAID ROW WINDINGS TO PROVIDE CURRENT IN A FIRST OR SECOND DIRECTION, AND MEANS FOR CONTROLLING A SELECTED DRIVER TO PROVIDE CURRENT IN A FIRST DIRECTION IN A ROW IN WHICH A CORE IS TO BE SELECTED AND CONTROLLING ANOTHER DRIVER TO PROVIDE CURRENT IN A SECOND DIRECTION THROUGH ANOTHER ROW CONNECTED TO THE COLUMN IN WHICH SAID CORE IS LOCATED, WHEREIN A CORE IN A SELECTED LOCATION MAY BE SET TO A DESIRED STABLE CONDITION.
References Cited (Backward Citations)
US2802203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |