Magnetic disk drive machine

Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record

Patent

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Details

360106, 360105, 36013034, G11B 5016, G11B 2108, G11B 1702, G11B 555

Patent

active

043152899

ABSTRACT:
A drive machine for magnetic diskettes of the type including a flexible disk rotatably disposed in a jacket having aligned radial slots in the two thicknesses of the jacket. The machine includes a pair of transducers extending through one of the slots into contact with one side of the disk and a pair of backup pads effective on the other side of the disk respectively opposite the pair of transducers and swingably mounted by swing arms to the frame of the machine. A motor driven cam plate with a spiral groove and a follower therein are used for moving the transducers radially on the disk for registry with different magnetic tracks thereon, and the cam plate has a peripheral portion that moves the swing arms to disengage the pads from the disk at outermost magnetic tracks for the transducers. The disk is clamped between a rotatable drive spindle and a collet, and the collet is carried on a swing arm mounted on the frame. Interconnections are provided between the swing arms so that, when the collet is moved out of engagement with the spindle, the pads are likewise moved out of engagement with the disk.

REFERENCES:
patent: 4001888 (1977-01-01), Morgan
patent: 4024581 (1977-05-01), Lesca et al.
patent: 4040106 (1977-08-01), Medley
patent: 4052750 (1977-10-01), Barber et al.
patent: 4193102 (1980-03-01), Beuch et al.
patent: 4198666 (1980-04-01), Manzke et al.
Lissner et al., "Disk File Actuator", IBM Tech. Disc. Bull., vol. 17, No. 10, Mar. 1975, p. 3016.

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