Abstract: A device for automatically inserting and ejecting an information carrier by means of an over-center mechanism, which is actuated manually until the over-center point is reached. The over-center mechanism comprises an eccentric gear which has a diameter which increases as the insertion movement proceeds, the gear surface engaging a sliding member for the information carrier. As a result, the automatic insertion path length is increased relative to the manual insertion path length.

Abstract: A magnetic tape-cassette apparatus comprising at least two push-buttons which have individual functions in the apparatus, when individually pushed in to produce a normal travel of their push-button rods, the individual push-button rods being releasably latched in the position in which the individual function is performed. The two push-button rods, when pushed in simultaneously, are depressible beyond the normal travel over a common overtravel path, to perform a further function, and a latching slide, which is movable to a release position for releasing the normal-travel latches, is retained in the release position by an intermediate slide when the push-button rods are in the overtravel range until the normal-travel latching projections have passed the latching cams during the outward movement of the push-button rods.