Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1990-05-07
1993-03-30
Young, Wayne R.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360105, G11B 5596, G11B 554
Patent
active
051989425
ABSTRACT:
A disc drive control device maintains power to its circuits after a manual power source switch is opened for a time sufficient to assure that the read/write head of a hard disc drive is moved to its shipping zone. This is accomplished with a bypass device for maintaining power to the hard disc drive until the head is properly stowed in its shipping position after the operator turns off the power switch. Further, a detecting circuit prevents the disc drive from hanging up when the operator turns power on again before the head movement is completed. A timer turns off the power bypass device a short time after the power source switch is turned off, if, for any reason, the power bypass fails to be shut down as a normal result of the completed movement of the read/write head to the shipping position.
REFERENCES:
patent: 4727443 (1988-02-01), Miyake et al.
patent: 4751595 (1988-06-01), Kishi et al.
patent: 4758914 (1988-07-01), Ishii
patent: 4786995 (1988-11-01), Stupeck et al.
"Retract System in Disk System", vol. 10, No. 19, (P-423) [2076] Jan. 24, 1986-Patent Abstracts of Japan.
Iizuka Hajime
Uchida Zenjiro
Kim Won Tae C.
Sanyo Electric Co,. Ltd.
Young Wayne R.
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