A disk file apparatus wherein a disk cartridge having an optical disk or a magnetic disk stored therein is alternatively loaded between a stocker and a disk driver as a single changer is reciprocated. A first reversing element rotates the changer around a first axis crossing at a right angle with a line...http://www.google.com.hk/patents/US5150341?utm_source=gb-gplus-share專利 US5150341 - Disk file apparatus
