Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1983-02-10
1985-07-09
Stellar, George G.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
G11B 558
Patent
active
045286051
ABSTRACT:
A rotary magnetic head scanning control system in a magnetic recording and reproducing apparatus comprising a plurality of rotary magnetic heads and a head height position control mechanism, comprises a pilot signal generating circuit for generating a pilot signal during a recording mode, a circuit for controlling interruption of application of the pilot signal and a recording signal to each of the rotary magnetic heads, so that the pilot signal is supplied to one of the rotary magnetic heads together with the recording signal for a predetermined interval to record the pilot signal and the recording signal and thereafter interrupt application of the recording signal to the one rotary magnetic head to put the one rotary magnetic head into a reproducing state, and application of a recording signal to another rotary magnetic head is interrupted during a predetermined interval in which the other rotary magnetic head scans over a track part adjacent to a track part recorded with the pilot signal of a recorded track formed by the one rotary magnetic head to put the other rotary magnetic head in a reproducing state and thereafter supply the pilot signal to the other rotary magnetic head together with the recording signal for a predetermined interval to record the pilot signal and the recording signal, and a circuit for obtaining a control signal to be applied to the head height position control mechanism from the pilot signal reproduced as crosstalk from a track part adjacent to a scanning track, to apply the control signal thus obtained to the head height position control means and control the height positions of each of the rotary magnetic heads to become the same.
REFERENCES:
patent: 4120008 (1978-10-01), Metzger et al.
patent: 4237500 (1980-12-01), Sanderson
Funkschau. vol. 51, No. 16, Aug. 1979, Munich (DE), pp. 72-76, (926-930), "Video 2000-ein neues Bildanfzeichnungs system".
Patent Abstracts of Japan, vol. 3, No. 44 (E-104), Apr. 14, 1979, p. 14E & JP-A-54 21 809.
Bernat Louis
Stellar George G.
Victor Company of Japan Ltd.
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