Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1981-01-14
1983-08-30
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
G11B 2110
Patent
active
044020228
ABSTRACT:
A tracking control system is used in a magnetic reproducing apparatus which comprises a rotary magnetic head for successively reproducing recorded signals from parallel tracks existing obliquely with respect to the longitudinal direction of a magnetic tape. The tracking system comprises a head swinging mechanism for varying the height position of the rotary magnetic head, and swinging the tracing position of the rotary magnetic head with respect to the track of the magnetic tape in the width direction of the track, a head swinging voltage generating circuit for generating a head swinging voltage, one or a plurality of memories for sampling and memorizing a voltage which is to be supplied to the head swinging means, at a point in time corresponding to when the rotary magnetic head passes one or a plurality of predetermined relative tracing positions respective of the magnetic tape, a level detecting circuit for detecting the level of a signal reproduced by the rotary magnetic head at a point in time identical to that of the above, a maximum level detecting circuit for detecting whether the level detected by the level detecting circuit has reached a maximum, a control circuit for enabling the reading-out of the voltage memorized in the memory upon detection of the maximum level by the maximum level detecting circuit, and an adding circuit for adding the voltage read out from the memory and the head swinging voltage supplied from the head swinging voltage generating circuit, and supplying the added voltage to the head swinging mechanism.
REFERENCES:
patent: 4104684 (1978-08-01), Wakami et al.
patent: 4148082 (1979-04-01), Okada et al.
patent: 4148083 (1979-04-01), Watanabe
patent: 4167762 (1979-09-01), Hashizaki et al.
patent: 4255768 (1981-03-01), Kubota
patent: 4297731 (1981-10-01), Melwisch et al.
Hiraguri Seisuke
Hirota Akira
Bernat Louis
Eddleman Alfred H.
Victor Company of Japan Ltd.
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