US4460934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head with full and partial coils for azimuth information
Assignee: Nakamichi Corp
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Filing: 1982-12-22
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Granted: 1984-07-17
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Expires: 2002-12-22
Abstract
Abstract This invention relates to a magnetic head for providing azimuth information therefrom relative to a signal recorded on a magnetic tape. The magnetic head of the invention has first and second coils for providing a reproduced signal corresponding to a recorded signal on the entire width of a recording track and a reproduced signal corresponding to a recorded signal on a part of width of the said recording track.
Inventors
- 👤 Fumiaki Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:22
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A magnetic head for reproducing a signal recorded on a magnetic tape, said magnetic head comprising; a core having a single gap corresponding to a recording track of said magnetic tape, said core including left-hand and right-hand core pieces and one of said core pieces being divided into upper and lower core pieces; a first coil wound on said core to encircle the entire core; a second coil wound to encircle only one of said upper and lower core pieces; and means responsive to reproduced signals picked up from said first and second coils and having an output to adjust the azimuth position of said magnetic head relative to a recorded signal on said recording track.
Claim 2
Dependent Claim
116 words
A magnetic head for reproducing a signal recorded on a magnetic tape, said magnetic head comprising; a core having a single gap corresponding to a recording track of said magnetic tape, said core including left-hand and right-hand core pieces and one of said core pieces being divided into upper and lower core pieces; a first coil wound on said core to encircle the entire core; a second coil wound to encircle only one of said upper and lower core pieces; and means responsive to reproduced signals picked up from said first and second coils and having an output to adjust the azimuth position of said magnetic head relative to a recorded signal on said recording track.
Claim 3
Dependent Claim
123 words
A magnetic head for reproducing a signal recorded on a magnetic tape, said magnetic head comprising; a core having a single gap corresponding to a recording track of said magnetic tape, said core having a portion thereof divided into upper and lower core pieces; a first coil wound to encircle the entire core and cooperate with said single gap to obtain a reproduced signal; and a second coil wound to encircle only one of said upper and lower core pieces and cooperate with only a portion of said single gap; and means responsive to the reproduced signals picked up from said first and second coils and having an output to adjust the relative azimuth position of said magnetic head and said recording track.
Claim 4
Dependent Claim
123 words
A magnetic head for reproducing a signal recorded on a magnetic tape, said magnetic head comprising; a core having a single gap corresponding to a recording track of said magnetic tape, said core having a portion thereof divided into upper and lower core pieces; a first coil wound to encircle the entire core and cooperate with said single gap to obtain a reproduced signal; and a second coil wound to encircle only one of said upper and lower core pieces and cooperate with only a portion of said single gap; and means responsive to the reproduced signals picked up from said first and second coils and having an output to adjust the relative azimuth position of said magnetic head and said recording track.
Claim 5
Dependent Claim
171 words
A magnetic head for reproducing a signal recorded on a magnetic tape and providing reproduced signals utilized in detecting an azimuth error thereof relative to said recorded signal, said magnetic head comprising; at least a special core having a gap corresponding to a recording track of said magnetic tape, said special core having a portion divided into upper and lower core pieces; a first coil wound on said special core to cooperate with the entire core and gap; a second coil would on only one of said upper and lower pieces of said divided core pieces to cooperate with only said one core piece and only a portion of said gap; and means responsive to a reproduced signal corresponding to said recorded signal on the entire width of said recording track picked up from said first coil and responsive to a reproduced signal corresponding to said recorded signal on a part of the width of said same recording track picked up from said second coil to establish an azimuth error signal.
Claim 6
Dependent Claim
171 words
A magnetic head for reproducing a signal recorded on a magnetic tape and providing reproduced signals utilized in detecting an azimuth error thereof relative to said recorded signal, said magnetic head comprising; at least a special core having a gap corresponding to a recording track of said magnetic tape, said special core having a portion divided into upper and lower core pieces; a first coil wound on said special core to cooperate with the entire core and gap; a second coil would on only one of said upper and lower pieces of said divided core pieces to cooperate with only said one core piece and only a portion of said gap; and means responsive to a reproduced signal corresponding to said recorded signal on the entire width of said recording track picked up from said first coil and responsive to a reproduced signal corresponding to said recorded signal on a part of the width of said same recording track picked up from said second coil to establish an azimuth error signal.
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) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |