US3781834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction cross-talk in double gap head
Assignee: US Philips Corp
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Filing: 1972-08-16
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Granted: 1973-12-25
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Expires: 1992-08-16
Abstract
Abstract A double gap magnetic head comprising at least one writing head and at least one reading head arranged behind the writing head in the direction of travel of the tape for writing and immediately thereafter reading information, in particular digital information, in which, to reduce the cross-talk, the writing winding is provided on one limb of the writing head and the reading winding is provided on one limb of the reading head asymmetrically relative to the central member separating the writing head and the reading head.
Inventors
- 👤 Ginkel J Van
- 👤 Heelsbergen T Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:54
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/10; G11B5/127; G11B5/265
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A double gap magnetic head comprising at least one writing head which is provided with one or more writing windings and at least one reading head which is provided with one or more reading windings and is arranged behind the writing head in the direction of movement of a magnetic record carrier to be conveyed along the magnetic head, the reading head and the writing head being arranged on either side of a central member which comprises at least a plate of a magnetically readily conducting material, characterized in that the winding configuration of the writing head and the winding configuration of the reading head are provided asymmetrically relative to the central member.
Claim 2
Dependent Claim
113 words
A double gap magnetic head comprising at least one writing head which is provided with one or more writing windings and at least one reading head which is provided with one or more reading windings and is arranged behind the writing head in the direction of movement of a magnetic record carrier to be conveyed along the magnetic head, the reading head and the writing head being arranged on either side of a central member which comprises at least a plate of a magnetically readily conducting material, characterized in that the winding configuration of the writing head and the winding configuration of the reading head are provided asymmetrically relative to the central member.
Claim 3
Dependent Claim
36 words
A magnetic head as claimed in claim 1, characterized in that one writing winding is provided on one limb of the writing head and one reading winding is provided on one limb of the reading head.
Claim 4
Dependent Claim
64 words
A magnetic head as claimed in claim 1, characterized in that the reading head and the writing head are each surrounded by a screening of a magnetically readily conducting but electrically poorly conducting material said screening extending parallel to the limbs of the heads, continuing up to the contact face with the tape and adjoining the magnetically readily conducting plate of the central member.
Claim 5
Dependent Claim
34 words
A magnetic head as claimed in claim 3, wherein one writing winding is provided on one limb of the writing head and one reading winding is provided on one limb of the reading head.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |