Dynamic magnetic information storage or retrieval – Record transport with head moving during transducing – Tape record
Patent
1995-08-07
1996-12-17
Evans, Jefferson
Dynamic magnetic information storage or retrieval
Record transport with head moving during transducing
Tape record
360110, 360115, 36013022, G11B 553, G11B 5008
Patent
active
055859771
ABSTRACT:
In a recorder/reproducer apparatus, a scanning magnetic transducer for the magnetic recording and reproducing of a data signal in a magnetic storage medium. The transducer includes one or more elongate main pole segments embedded in the periphery of a rotary drum and oriented at an angle relative to the drum's axis of rotation. An elongate stationary pole with an electromagnetic winding coupled to the data signal is spaced from the drum and oriented generally parallel to the axis of rotation. A magnetic tape is transported between the two poles in contact with the main pole segments on the drum and spaced from the stationary pole. Rotation of the drum during recording and/or playback causes the area of intersection, that is, the opposed common area or confronting face portions, of the stationary pole and each of the successive main pole segments to be moved or scanned along the face of the stationary pole. A concentrated magnetic field corresponding to the data signal is generated at the area of intersection and thus also is moved along the length of the stationary pole. As a result, a series of generally transverse tracks of magnetic states are recorded in, or reproduced from, the tape as it is moved between the main pole segments and the stationary pole. Plural stationary poles may be used to provide a multiple track magnetic transducer for recording and reproducing multiple tracks in the magnetic storage medium.
REFERENCES:
patent: 4040110 (1977-08-01), Bagby
patent: 4151591 (1979-04-01), Sziklai
patent: 4636886 (1987-01-01), Schwarz
patent: 4647993 (1987-03-01), Schwarz et al.
patent: 4782277 (1988-11-01), Morita
patent: 4796134 (1989-01-01), Watanabe et al.
patent: 4985795 (1991-01-01), Gooch
patent: 5060104 (1991-10-01), Kitaori et al.
patent: 5070487 (1991-12-01), Watson
Almeida George B.
Ampex Corporation
Evans Jefferson
Mesaros John G.
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