Floppy disk drive apparatus

Details Floppy disk drive apparatus Floppy disk drive apparatus

1986-04-09

1987-05-12

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

G11B 5012

Patent

active

046654453

ABSTRACT:
A floppy disk drive apparatus includes a receptacle portion for receiving a jacket which has a notch on an edge portion thereof and houses a floppy disk with an index hole therein; a holding member for holding the floppy disk inserted in the receptacle portion; a disk driver for rotating the floppy disk held by the holding member; an index detector for generating an index detection signal when the jacket is inserted not to exceed a predetermined distance in the receptacle portion through a disk slot, or the index hole is detected; and a notch detector for generating a notch detection signal when the jacket is inserted not to exceed a predetermined distance in the receptacle portion through the disk slot, or the notch of the jacket is detected. The apparatus further includes a control circuit, connected to the index and notch detectors, for generating a non-disk signal representing that the floppy disk is not inserted in the receptacle portion when detecting that the index detection signal is generated from the index detector when the notch detector starts generating the notch detection signal.

REFERENCES:
IBM Technical Disclosure Bulletin, vol. 22, No. 1, Jun. 1979, pp. 287-290.
Index Amplifier Control for Detecting Diskette in Disk Drive, K. Russell et al.

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