Abstract: A housing for an information storage medium where at least one surface of that housing includes a plurality of grooves. A locomotion apparatus to move Applicants' housing within an information storage and retrieval system, where that apparatus includes at least one rotatable shaft and at least one drive member disposed on that shaft, where each such drive member has the shape of a truncated cone, and where each such drive member includes a drive surface which includes a plurality of ribs. Applicants' drive member contacts the grooved surface of Applicants' housing such that one or more of the ribs disposed on the drive surface intermeshes with one or more of the grooves in the housing. Rotation of the rotatable shaft in a first direction causes the housing the move in a second direction. Rotation of the rotatable shaft in a third direction causes the housing to move in a fourth direction.

Abstract: A housing for an information storage medium where at least one surface of that housing includes a plurality of grooves. A locomotion apparatus to move Applicants' housing within an information storage and retrieval system, where that apparatus includes at least one rotatable shaft and at least one drive member disposed on that shaft, where each such drive member has the shape of a truncated cone, and where each such drive member includes a drive surface which includes a plurality of ribs. Applicants' drive member contacts the grooved surface of Applicants' housing such that one or more of the ribs disposed on the drive surface intermeshes with one or more of the grooves in the housing. Rotation of the rotatable shaft in a first direction causes the housing the move in a second direction. Rotation of the rotatable shaft in a third direction causes the housing to move in a fourth direction.

Abstract: A double storage multi-carousel recordable media library is provided which includes a plurality of vertically stacked carousels mounted for rotation about a vertically extending central axis. Each carousel has a plurality of receptacles which are angularly spaced about the central axis, each receptacle being capable of storing a pair of recordable media disks. Each carousel has a large peripheral cutout which is located between a pair of receptacles for allowing passage of the disks and each receptacle has a smaller peripheral cutout for allowing movement of a transport device. Each carousel cutout is capable of alignment along a transport axis which is parallel to the central axis so that a disk can be transported vertically therealong. A disk chucking device is mounted for receiving and releasably retaining disks which are moved vertically along the transport axis.