Switchable Magnetic Chuck For Disk Cartridge
Original Publication Date: 1979-Jun-01
Included in the Prior Art Database: 2005-Feb-20
Typical cartridge-type magnetic disk files, such as those shown in U.K. Patents 1,095,242 and 1,200,572, employ cartridges in which a magnetic disk is clamped against motion when out of the file. When the cartridge is loaded into the file, the disk is released for rotation on a spindle in the drive. The drive coupling between spindle and disk is a magnetic chuck employing permanent magnets rotating with the spindle and an armature which is part of the disk hub.