US3341667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic transducer with single piece core
Assignee: International Business Machines Corp
•
Filing: 1962-03-19
•
Granted: 1967-09-12
•
Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Brown Edgar Alan
- 👤 Schacht Gunter Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:05
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/10; G11B5/127; G11B5/147; G11B5/187; G11B5/23; G11B5/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A TRANSDUCER FOR ASSOCIATION WITH A SINGLE INFORMATION TRACK ON A MAGNETIC RECORD COMPRISING: A CORE FORMED FROM A SINGLE CONTINUOUS PIECE OF MAGNETIC MATERIAL HAVING FIRST AND SECOND CLOSELY SPACED POLE PIECES SEPARATED BY A NON-MAGNETIC GAP ACROSS WHICH SAID MAGNETIC RECORD IS ARRANGED TO PASS IN A PREDETERMINED DIRECTION, SAID FIRST POLE PIECE EXTENDIND SUBSTANTIALLY TRANSVERSE TO SAID PREDETERMINED DIRECTION, SAID SECOND POLE PIECE EXTENDING SUBSTANTIALLY PARALLEL TO SAID PREDETERMINED DIRECTION, SAID SECOND POLE PIECE COMPRISING SPACED PORTIONS OF SAID MAGNETIC PERMEABLE MATERIAL IN PLANES SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF THE RECORD, AND MEANS POSITIONED ON SAID CORE MEMBER BETWEEN SAID FIRST AND SECOND POLE PIECES FOR ESTABLISHING A MAGNETIC FLUX WHICH EXTENDS INTO SAID RECORD ALONG SAID SINGLE INFORMATION TRACK ADJACENT SAID NON-MAGNETIC GAP.
Claim 2
Dependent Claim
128 words
A TRANSDUCER FOR ASSOCIATION WITH A SINGLE INFORMATION TRACK ON A MAGNETIC RECORD COMPRISING: A CORE FORMED FROM A SINGLE CONTINUOUS PIECE OF MAGNETIC MATERIAL HAVING FIRST AND SECOND CLOSELY SPACED POLE PIECES SEPARATED BY A NON-MAGNETIC GAP ACROSS WHICH SAID MAGNETIC RECORD IS ARRANGED TO PASS IN A PREDETERMINED DIRECTION, SAID FIRST POLE PIECE EXTENDIND SUBSTANTIALLY TRANSVERSE TO SAID PREDETERMINED DIRECTION, SAID SECOND POLE PIECE EXTENDING SUBSTANTIALLY PARALLEL TO SAID PREDETERMINED DIRECTION, SAID SECOND POLE PIECE COMPRISING SPACED PORTIONS OF SAID MAGNETIC PERMEABLE MATERIAL IN PLANES SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF THE RECORD, AND MEANS POSITIONED ON SAID CORE MEMBER BETWEEN SAID FIRST AND SECOND POLE PIECES FOR ESTABLISHING A MAGNETIC FLUX WHICH EXTENDS INTO SAID RECORD ALONG SAID SINGLE INFORMATION TRACK ADJACENT SAID NON-MAGNETIC GAP.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |