Patent US3093818A successfully refreshed from Google Patents.
US3093818A
Expired / Lapsed
US
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Domain rotational memory system
Assignee: International Business Machines Corp
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Filing: 1956-10-08
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Granted: 1963-06-11
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Lloyd P Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0808; G11C19/0816; H; H03; H03K; H03K17/00; H03K17/51; H03K17/80; H03K17/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
AN INFORMATION STORAGE DEVICE COMPRISING A PLURALITY OF TUBULAR ELEMENTS, EACH OF SAID ELEMENTS INCLUDING A PLURALITY OF RINGS OF MAGNETIC MATERIAL ON ONE SURFACE THEREOF, EACH OF SAID RINGS OF MAGNETIC MATERIAL HAVING A PREFERRED AXIS OF MAGNETIZATION WHEREIN MAGNETIZATION IN ONE AND THE OTHER DIRECTION ALONG SAID AXIS REPRESENTATIVE OF TWO BINARY STATES, MEANS INDUCTIVELY COUPLED TO EACH OF SAID RINGS FOR MODIFYING THE EXCITATION THRESHOLD OF SAID MAGNETIC MATERIAL BY GENERATING A MAGNETIC FIELD HAVING A COMPONENT TRANSVERSE TO THE PREFERRED AXIS OF MAGNETIZATION AND ENERGIZATION MEANS INDUCTIVELY COUPLED TO EACH OF SAID RINGS FOR GENERATING A MAGNETIC FIELD ALONG THE PREFERRED AXIS OF MAGNETIZATION, THE MAGNITUDE OF THE FIELD GENERATED ALONG THE PREFERRED AXIS OF MAGNETIZATION EXCEEDING SAID MODIFIED THRESHOLD WHEREBY SWITCHING OF SAID RING FROM ONE TO THE OTHER DIRECTION OF SAID PREFERRED AXIS OF MAGNETIZATION MAY BE ACCOMPLISHED.
Claim 2
Dependent Claim
144 words
AN INFORMATION STORAGE DEVICE COMPRISING A PLURALITY OF TUBULAR ELEMENTS, EACH OF SAID ELEMENTS INCLUDING A PLURALITY OF RINGS OF MAGNETIC MATERIAL ON ONE SURFACE THEREOF, EACH OF SAID RINGS OF MAGNETIC MATERIAL HAVING A PREFERRED AXIS OF MAGNETIZATION WHEREIN MAGNETIZATION IN ONE AND THE OTHER DIRECTION ALONG SAID AXIS REPRESENTATIVE OF TWO BINARY STATES, MEANS INDUCTIVELY COUPLED TO EACH OF SAID RINGS FOR MODIFYING THE EXCITATION THRESHOLD OF SAID MAGNETIC MATERIAL BY GENERATING A MAGNETIC FIELD HAVING A COMPONENT TRANSVERSE TO THE PREFERRED AXIS OF MAGNETIZATION AND ENERGIZATION MEANS INDUCTIVELY COUPLED TO EACH OF SAID RINGS FOR GENERATING A MAGNETIC FIELD ALONG THE PREFERRED AXIS OF MAGNETIZATION, THE MAGNITUDE OF THE FIELD GENERATED ALONG THE PREFERRED AXIS OF MAGNETIZATION EXCEEDING SAID MODIFIED THRESHOLD WHEREBY SWITCHING OF SAID RING FROM ONE TO THE OTHER DIRECTION OF SAID PREFERRED AXIS OF MAGNETIZATION MAY BE ACCOMPLISHED.
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |