Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1982-11-22
1985-10-29
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record medium
In container
G11B 2302
Patent
active
045503559
ABSTRACT:
A releasable hub locking mechanism for a disk hub assembly and a magnetic memory cartridge. A lever plate having an inner margin with a pair of hub flange pressure portions in surface contact with the lower surface of an inner hub flange arranged within the cartridge housing includes an outer margin with a lower release portion received in an aperture in the bottom portion of the cartridge housing. A longitudinally extending torsion spring has first and second ends secured against rotation by keeper bosses formed in the bottom casing portion and includes a central loop portion for applying a downward pressure to an inwardly extending tang located on the outer margin of the lever plate.
The torsion spring normally provides a rotational force to the lever plate to cause the hub to be locked in place by interference between the lower surface of the bottom casing portion and a lower hub flange located externally of the casing. When the cartridge is inserted into an associated disk drive, the disk drive release pin counteracts the force provided by the torsional spring to release the hub for rotation.
REFERENCES:
patent: 4394700 (1983-07-01), Edwards
Larson Bert R.
Wartenbergh Robert P.
Dysan Corporation
Heinz A. J.
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