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US3308446A Expired / Lapsed US ⏱️ 0.0 years remaining

Ferrite sheet memory with read and write by angular deflection of flux loops

Assignee: RCA Corp
•
Filing: 1962-10-04
•
Granted: 1967-03-07
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Expires: 1982-10-04
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Abstract

No abstract record available.

Inventors

  • 👤 Jan A Rajchman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 00:47
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06092

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 251 words
A MEMORY COMPRISING A FERRITE MAGNETIC SHEET HAVING A PLURALITY OF PARALLEL WORD LINES IMBEDDED THEREIN IN A FIRST PLANE AND HAVING A PLURALITY OF PARALLEL DIGIT-SENSE LINES IMBEDDED AT RIGHT ANGLES TO SAID WORD LINES IN A SECOND, CLOSELY SPACED PLANE, WORD DRIVER MEANS TO APPLY SEQUENTIAL READ AND WRITE PULSES OF OPPOSITE POLARITIES TO ANY SELECTED ONE OF SAID WORD LINES, SAID WORD DRIVER MEANS BEING CONSTRUCTED TO GENERATE READ AND WRITE PULSES HAVING A SUFFICIENTLY HIGH AMPLITUDE TO CAUSE A REGION OF FLUX SATURATION COAXIALLY ENCIRCLING THE SELECTED WORD LINE AND EXTENDING OUT THEREFROM BEYOND THE DIGIT-SENSE LINES, AND DIGIT DRIVER MEANS TO APPLY DIGIT PULSES SIMULTANEOUSLY WITH SAID WRITE PULSE TO SAID DIGIT-SENSE LINES IN ACCORDANCE WITH DIGITS OF A WORD TO BE STORED IN THE MEMORY, SAID DIGIT DRIVER MEANS BEING CONSTRUCTED TO GENERATE PULSES OF INSUFFICIENT AMPLITUDE TO CAUSE A SIGNIFICANT CHANGE IN THE AMOUNT OF ALREADY-SATURATED FLUX AT A CROSSOVER OF A DIGIT LINE AND A WORD LINE, SAID DIGIT PULSE BEING PRESENT AND OPERATIVE TO CAUSE A ROTATION OF THE WRITE PULSE FLUX TO A RESULTANT DIAGONAL ANGULAR DIRECTION WHEN THE FLUX IS SWITCHED TO SATURATION IN THE REGION OF A CROSSOVER OF A DIGIT LINE AND A WORD LINE ENERGIZED BY A WRITE PULSE, WHEREBY A SUBSEQUENTLY APPLIED READ PULSE ON SAID SELECTED WORD LINE CAUSES A ROTATION OF THE DIAGONALLYDIRECTED FLUX TO A DIRECTION COAXIAL WITH THE WORD LINE AND THE CONSEQUENT INDUCING OF SENSED INFORMATION SIGNALS ON SAID DIGIT-SENSE LINES.
Claim 2
Dependent Claim 251 words
A MEMORY COMPRISING A FERRITE MAGNETIC SHEET HAVING A PLURALITY OF PARALLEL WORD LINES IMBEDDED THEREIN IN A FIRST PLANE AND HAVING A PLURALITY OF PARALLEL DIGIT-SENSE LINES IMBEDDED AT RIGHT ANGLES TO SAID WORD LINES IN A SECOND, CLOSELY SPACED PLANE, WORD DRIVER MEANS TO APPLY SEQUENTIAL READ AND WRITE PULSES OF OPPOSITE POLARITIES TO ANY SELECTED ONE OF SAID WORD LINES, SAID WORD DRIVER MEANS BEING CONSTRUCTED TO GENERATE READ AND WRITE PULSES HAVING A SUFFICIENTLY HIGH AMPLITUDE TO CAUSE A REGION OF FLUX SATURATION COAXIALLY ENCIRCLING THE SELECTED WORD LINE AND EXTENDING OUT THEREFROM BEYOND THE DIGIT-SENSE LINES, AND DIGIT DRIVER MEANS TO APPLY DIGIT PULSES SIMULTANEOUSLY WITH SAID WRITE PULSE TO SAID DIGIT-SENSE LINES IN ACCORDANCE WITH DIGITS OF A WORD TO BE STORED IN THE MEMORY, SAID DIGIT DRIVER MEANS BEING CONSTRUCTED TO GENERATE PULSES OF INSUFFICIENT AMPLITUDE TO CAUSE A SIGNIFICANT CHANGE IN THE AMOUNT OF ALREADY-SATURATED FLUX AT A CROSSOVER OF A DIGIT LINE AND A WORD LINE, SAID DIGIT PULSE BEING PRESENT AND OPERATIVE TO CAUSE A ROTATION OF THE WRITE PULSE FLUX TO A RESULTANT DIAGONAL ANGULAR DIRECTION WHEN THE FLUX IS SWITCHED TO SATURATION IN THE REGION OF A CROSSOVER OF A DIGIT LINE AND A WORD LINE ENERGIZED BY A WRITE PULSE, WHEREBY A SUBSEQUENTLY APPLIED READ PULSE ON SAID SELECTED WORD LINE CAUSES A ROTATION OF THE DIAGONALLYDIRECTED FLUX TO A DIRECTION COAXIAL WITH THE WORD LINE AND THE CONSEQUENT INDUCING OF SENSED INFORMATION SIGNALS ON SAID DIGIT-SENSE LINES.

References Cited (Backward Citations)

US3040301A Cited
US3112470A Cited
US3181131A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1970-03-06 1970-09-05 1971-03-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1974-03-06 1974-09-05 1975-03-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1978-03-06 1978-09-05 1979-03-07 $7700.00 Window Closed / Lapsed

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