Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1994-05-05
1995-03-14
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7701, 360 75, 360119, 360121, G11B 5584
Patent
active
053981456
ABSTRACT:
Tracking control apparatus includes a magnetic recording medium (disk or tape) comprising a dedicated servo track having recorded thereon a servo signal having a fixed spatial wavelength, and magnetic playback apparatus comprising a servo tracking head having an elongated tapered transducing gap transverse to the dedicated servo track. The transducing gap has (1) a relatively small magnetic gap length, at a first end of the gap, which is less than the spatial wavelength of the recorded signal, and (2) a relatively large magnetic gap length, at a second opposing end of the gap, which is greater than the spatial wavelength of the recorded servo signal. The servo head is in a desired tracking position when the segment of the tapered gap aligned with the servo track has a magnetic gap length that is equal to the spatial wavelength of the servo signal.
REFERENCES:
patent: 3404392 (1968-10-01), Sordello
patent: 3697705 (1972-10-01), Holt
patent: 5010430 (1991-04-01), Yamada et al.
patent: 5099376 (1992-03-01), Ino et al.
Jeffers Frederick J.
Rolker John
Eastman Kodak Company
Edun Muhammad N.
Noval William F.
Psitos Aristotelis M.
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