Magnetic tape cartridge changer system

Claim 1

A magnetic tape changer system having, in combination, a substantially disc-shaped magazine provided with means for detachably receiving a plurality of similar tape cartridges in successive positions about the circumference of the magazine with the tapes of successive received cartridges exposed at predetermined portions thereof and defining a substantially circular path, means disposed along said path at a transducing position for transducing signals at said exposed tape portions, a platform for rotatably supporting said magazine, means for rotating said magazine with respect to said platform and said transducing means about the axis of said magazine to select a predetermined cartridge for the transducing of a tape at said transducing position, said platform having roller means at opposite sides thereof engaging said magazine, the roller means at one side of said platform having a fixed rotational axis and the roller means at the opposite side of said platform having a movable rotational axis spring biased toward said magazine, the periphery of said magazine having a plurality of depressions into which said roller means enter when a cartridge is located at said tape-transducing position, whereby the magazine moves away from the fixed-axis roller means as it is rotated to bring a cartridge into said tape-transducing position, said transducing means being positioned relative to said magazine so that the magazine moves away from said transducing means as it is rotated, and means for constraining relative movement of said magazine and said transducing means substantially to a plane parallel to said magazine.