US3287713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording heads utilizing symmetrical windings to avoid cross talk
Assignee: Lanteris Space LLC
•
Filing: 1962-10-12
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Granted: 1966-11-22
•
Expires: 1982-10-12
Abstract
No abstract record available.
Inventors
- 👤 Vincent J Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:55
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A READ-WRITE MAGNETIC HEAD COMPRISING A MAGNETIC CORE INCLUDING AN E-SHAPED SECTION AND I-SHAPED SECTION SPACED FROM THE ENDS OF THE LEGS OF SAID E-SHAPED SECTION SO AS TO CREATE THREE MAGNETIC GAPS, A DRIVE WINDING WOUND ON SAID MAGNETIC CORE SO AS TO CREATE MAGNETIC FLUX PATHS IN THE CENTER AND END LEGS OF SAID E-SHAPED SECTION, THE FLEX IN EACH OF SAID END LEGS BEING SUBSTANTIALLY EQUAL AND TRAVELLING IN THE SAME DIRECTION WITH RESPECT TO SAID CENTER LEG SO THAT THE FLUX VALUE IN SAID CENTER LEG IS SUBSTANTIALLY TWICE THE MAGNITUDE OF THE FLUX IN EACH OF SAID END LEGS, AND A READ WINDING WOUND WOUND ON SAID I-SHAPED SECTION OF SAID MAGNETIC CORE SO THAT THE FLUX PATHS FROM SAID DRIVE WINDING INDUCE EQUAL BUT OPPOSITE AND HENCE SELF-CANCELING VOLTAGES IN SAID READWINDING.
Claim 2
Dependent Claim
138 words
A READ-WRITE MAGNETIC HEAD COMPRISING A MAGNETIC CORE INCLUDING AN E-SHAPED SECTION AND I-SHAPED SECTION SPACED FROM THE ENDS OF THE LEGS OF SAID E-SHAPED SECTION SO AS TO CREATE THREE MAGNETIC GAPS, A DRIVE WINDING WOUND ON SAID MAGNETIC CORE SO AS TO CREATE MAGNETIC FLUX PATHS IN THE CENTER AND END LEGS OF SAID E-SHAPED SECTION, THE FLEX IN EACH OF SAID END LEGS BEING SUBSTANTIALLY EQUAL AND TRAVELLING IN THE SAME DIRECTION WITH RESPECT TO SAID CENTER LEG SO THAT THE FLUX VALUE IN SAID CENTER LEG IS SUBSTANTIALLY TWICE THE MAGNITUDE OF THE FLUX IN EACH OF SAID END LEGS, AND A READ WINDING WOUND WOUND ON SAID I-SHAPED SECTION OF SAID MAGNETIC CORE SO THAT THE FLUX PATHS FROM SAID DRIVE WINDING INDUCE EQUAL BUT OPPOSITE AND HENCE SELF-CANCELING VOLTAGES IN SAID READWINDING.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |