Dysan Corporation

Verbatim Corporation

Bert R Larson

Robert P Wartenbergh

Efim Bronshvatch

Bin-Lun Ho

Roy E Hurtig

David A Sutton

Markus Meier

Janusz Warszawski

Steven D Smith

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.

Removable disk cartridge with improved hub locking mechanism

A removable hard disc memory cartridge for use with a drive mechanism including a spindle located within a drive housing. The drive housing interior is provided with stationary position registration members which cooperate with mating side edge portions of the cartridge to provide positive positioning when the cartridge is inserted into the drive housing. A disc lock carried by the cartridge maintains the internally mounted cartridge disc in a secured locked position when the cartridge is not in use, the lock mechanism cooperating with release posts carried by the drive housing to free the disc for rotation just prior to engagement by the drive spindle. The disc has a self centering hub including a spindle referencing member having an aperture for receiving the free end of the spindle, the referencing member including angularly spaced arcuate segments closely matched to the radius of curvature of the drive spindle and providing a lateral abutment for the outer surface of the surface, the referencing member further including a spindle biasing spring laterally spaced from the arcuate segments and engageable with the outer surface of the spindle for urging the spindle into surface contact with the arcuate segments. The housing includes an end wall with an air exit port laterally displaced from the transducer access port, which provides a circumferentially oriented flow exit path for air entering the volume enclosed by the cartridge via the access port when the disc is rotated.

Removable disk cartridge

An improved tape cartridge with length dimension significantly greater than prior art cartridges of similar application, tape packs and drive belt being disposed to permit tape packs of greatly increased tape capacity and thereby a multifold increase in total cartridge capacity, and the front face being compatible for interfacing with most commercially available cartridge tape drives.

Tape cartridge with increased tape capacity

Growing community of inventors

San Jose, CA, United States of America

Bert R Larson