Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1988-08-26
1990-11-13
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360107, 360 7717, G11B 555, G11B 2110
Patent
active
049706110
ABSTRACT:
A head-carrier drum control apparatus in a magnetic recording and/or reproducing apparatus which comprises a rotatably supported head-carrier drum assembly; a drive unit accommodated in the head-carrier drum assembly including a coil, disposed in a magnetic circuit, and at least one positionable magnetic transducing head cooperable with the coil to be displaced in a direction generally widthwise of a length of magnetic tape. The apparatus further includes a contact feeler through which a control current is supplied to the drive unit; an electrode held in contact with the contact feeler and connected electrically with the coil; and a drive circuit for controlling the position of the transducer head so as to cause a trace of movement of the transducing head depicted during information reproduction to properly follow a track recorded by a magnetic transducing head on the length of magnetic tape during information recording.
REFERENCES:
patent: 4318142 (1982-03-01), Ravizza
patent: 4365279 (1982-12-01), Kinjo
patent: 4446497 (1984-05-01), Hirayama
patent: 4451859 (1984-05-01), Noel
patent: 4485414 (1984-11-01), Baker
patent: 4695907 (1987-08-01), Inaji et al.
Millman, Microelectronics: Digital and Analog Circuits and Systems, 1979, pp. 564-565.
Kodama Masafumi
Kojima Masanori
Sano Akira
Canney Vincent P.
Mitsubishi Denki & Kabushiki Kaisha
Robertson David L.
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