Patent US3240881A successfully refreshed from Google Patents.
US3240881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducing head
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1965-03-11
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Granted: 1966-03-15
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Expires: 1985-03-11
Abstract
No abstract record available.
Inventors
- 👤 Donald S Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:52
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/17; G11B5/187; G11B5/48; G11B5/488; G11B5/4893
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A DATA PROCESSING SYSTEM, COMPRISING: AN ELECTROMAGNETIC TRANSDUCER INCLUDING A SUBSTANTIALLY THIN, FERROMAGNETIC CORE, SAID CORE HAVING INNER AND OTHER EDGES DEFINING CONCENTRIC LOOPS, AND THE MAJOR PORTION OF SAID CORE DEFINING A PLANE HAVING A NORMAL AXIS WITHIN SAID INNER EDGE, GAP DEFINING MEANS COUPLED TO SAID CORE, INTERSECTING BOTH SAID LOOP DEFINING EDGES AND HAVING JUXTAPOSED POLE PIECES SHAPED SO AS TO PROVIDE TWO SYMMETRICALLY DISPOSED PAIRS OF OPPOSED POLE PIECES EDGES COEXTENSIVE WITH SAID CORE PLANE AND AN ELECTROMAGNETIC COUPLING MEANS COUPLED TO SAID CORE FOR CONVERTING ELECTRICAL AND MAGNETIC SIGNALS; FIRST TRANSPORT MEANS FOR TRANSPORTING A MAGNETIC DATA
Claim 2
Dependent Claim
102 words
A DATA PROCESSING SYSTEM, COMPRISING: AN ELECTROMAGNETIC TRANSDUCER INCLUDING A SUBSTANTIALLY THIN, FERROMAGNETIC CORE, SAID CORE HAVING INNER AND OTHER EDGES DEFINING CONCENTRIC LOOPS, AND THE MAJOR PORTION OF SAID CORE DEFINING A PLANE HAVING A NORMAL AXIS WITHIN SAID INNER EDGE, GAP DEFINING MEANS COUPLED TO SAID CORE, INTERSECTING BOTH SAID LOOP DEFINING EDGES AND HAVING JUXTAPOSED POLE PIECES SHAPED SO AS TO PROVIDE TWO SYMMETRICALLY DISPOSED PAIRS OF OPPOSED POLE PIECES EDGES COEXTENSIVE WITH SAID CORE PLANE AND AN ELECTROMAGNETIC COUPLING MEANS COUPLED TO SAID CORE FOR CONVERTING ELECTRICAL AND MAGNETIC SIGNALS; FIRST TRANSPORT MEANS FOR TRANSPORTING A MAGNETIC DATA
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |