← Back to Patent Explorer
US3138787A Expired / Lapsed US ⏱️ 0.0 years remaining

Double triangular array memory drive

Assignee: International Business Machines Corp
•
Filing: 1961-08-25
•
Granted: 1964-06-23
•
Expires: 1981-08-25
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

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

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag