Abstract: An automatic magnetic-tape cassette changer with a feed-in magazine and a feed-out magazine for cassettes, in which a cassette pusher pushes the lowermost cassette of the stack in the feed-in magazine underneath the stack of cassettes in the feed-out magazine during the changing cycle. The changer is independent and removable from the tape recorder mechanism, and includes means for lowering the entire feed-in stack to a position for playing or recording the lowest cassette, and raising the entire stack to a position for transferring the cassette just played.

Abstract: An interchangeable random-access magnetic storage element, comprising an electromagnetic disk disposed in a substantially cylindrical dust-proof enclosure, which as an assembly can be fitted onto a drive spindle of a drive means. The enclosure comprises two covers which are clamped against each other with the insertion of dust seals, which together with the magnetic disk are rotated by the drive spindle, the upper cover being axially lifted by lifting cams provided on the drive spindle, so that an annular slot is obtained between the lower and upper cover for the passage of electromagnetic recording and reproducing means. At its top the drive spindle comprises an axially movable pressure member, which upon closure of a cover of the drive means is depressed and thus clamps the electromagnetic disk onto the spindle and simultaneously lifts the upper cover.