US3132214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recorder head assembly
Assignee: Unisys Corp
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Filing: 1960-05-13
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Granted: 1964-05-05
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Expires: 1980-05-13
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Welsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:03
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/488; G11B5/004; G11B5/127; G11B5/265; G11B5/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A MULTICHANNEL MAGNETIC RECORDING HEAD ASSEMBLY HAVING A PLURALITY OF MAGNETIC HEADS EACH COMPRISING FIRST MAGNETIC HEAD MEANS HAVING A FIRST MAGNETIZABLE CORE, A TRANSDUCER COIL LINKING SAID FIRST CORE, AID FIRST CORE HAVING CONFRONTING POLE FACES FORMING A FIRST NON-MAGNETIC GAP ADAPTED FOR READING AND WRITING INFORMATION ON A MAGNETIC RECORD MEMBER MOVABLE RELATIVE TO SAID HEAD ASSEMBLY AND IN CLOSE PROXIMITY TOSAID GAP, THE LENGTH OF THE SAID POLE FACES OF SAID FIRST CORE TRANSVERSE TO THE DIRECTION OF RELATIVE MOVEMENT OF SAID RECORD MEMBER ESTABLISHING A CORRESPONDING INFORMATION CHANNEL ON THE RECORD MEMBER, SECOND MAGNETIC HEAD MEANS HAVING A SECOND MAGNETIZABLE CORE, AN ERASE COIL LINKING SAID COIL, SAID SECOND CORE HAVING CONFRONTING POLE FACES FORMING A SECOND NON-MAGNETIC GAP EXTENDIG TRANSVERSE TO THE DIRECTION OF RELATIVE MOVEMENT OF SAID RECORD MEMBER THE WIDTH OF SAID SECOND GAP BEING SUFFICIENT TO ESTABLISH AN ERASE PATH COVERING A SMALL PORTION ALONG AN EDGE OF SAID CHANNEL AND AN AREA JUST ADJACENT TO SAID EDGE.
Claim 2
Dependent Claim
166 words
A MULTICHANNEL MAGNETIC RECORDING HEAD ASSEMBLY HAVING A PLURALITY OF MAGNETIC HEADS EACH COMPRISING FIRST MAGNETIC HEAD MEANS HAVING A FIRST MAGNETIZABLE CORE, A TRANSDUCER COIL LINKING SAID FIRST CORE, AID FIRST CORE HAVING CONFRONTING POLE FACES FORMING A FIRST NON-MAGNETIC GAP ADAPTED FOR READING AND WRITING INFORMATION ON A MAGNETIC RECORD MEMBER MOVABLE RELATIVE TO SAID HEAD ASSEMBLY AND IN CLOSE PROXIMITY TOSAID GAP, THE LENGTH OF THE SAID POLE FACES OF SAID FIRST CORE TRANSVERSE TO THE DIRECTION OF RELATIVE MOVEMENT OF SAID RECORD MEMBER ESTABLISHING A CORRESPONDING INFORMATION CHANNEL ON THE RECORD MEMBER, SECOND MAGNETIC HEAD MEANS HAVING A SECOND MAGNETIZABLE CORE, AN ERASE COIL LINKING SAID COIL, SAID SECOND CORE HAVING CONFRONTING POLE FACES FORMING A SECOND NON-MAGNETIC GAP EXTENDIG TRANSVERSE TO THE DIRECTION OF RELATIVE MOVEMENT OF SAID RECORD MEMBER THE WIDTH OF SAID SECOND GAP BEING SUFFICIENT TO ESTABLISH AN ERASE PATH COVERING A SMALL PORTION ALONG AN EDGE OF SAID CHANNEL AND AN AREA JUST ADJACENT TO SAID EDGE.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |