Magnetic core memory circuits
Abstract
Abstract A MAGNETIC STORAGE DEVICE COMPRISING A PLURALITY OF MAGNETIC ELEMENTS ARRANGED IN ROWS AND COLUMNS TO FORM A MATRIX, SAID MAGNETIC ELEMENTS EACH BEING CONSITUATED OF FERROMAGNETIC MATERIAL AND POSSESSING TWO STABLE OPPOSITE REMANENCE STATES, A READING CONDUCTOR COUPLED TO EACH MAGNETIC ELEMENT, AND MEANS FOR PERMANENTLY RECORDING INFORMATION IN SAID DEVICE BY DISABLING SELECTED ELEMENTS OF THE MATRIX, SAID DISABLING MEANS INCLUDING A PLURALITY OF PERMANENT MAGNETS EACH CAPABLE OF PREMAGNETIZING ONE OF SAID MAGNETIC ELEMENTS WHEN IN CLOSE PROXIMITY THERETO AND THUS EFFECTIVELY REMOVING THE SAID PREMAGNETIZED ELEMENT FROM THE MATRIX, AND MEANS FOR BRINGING SAID PERMANENT MAGNETS EACH INTO THE CLOSE PROXIMITY OF ONE OF SAID SELECTED ELEMENTS.
Inventors
- 👤 Stanton M Shackell
Bibliographic Details
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |