Abstract: A type disk for a typewriter, having a hub which can be plugged over a drive shaft of the typewriter and a catch, which can be moved to or fro relative to the hub, and is carried by an outrigger connected integrally to the hub and capable of being deflected in the axial direction of the hub and can be engaged in a recess of a collar of a drive shaft for rotational position fixing of the type disk. A cut-out which is arranged in the surface portion of the type disk for the hub extends in the configuration of a circular arc in the hub plane substantially in a semi-circular arc, and the outrigger is configured as a circular arc-shaped bow, the course of which is congruent with that of the cut-out in the region of the cut-out, and can be accommodated in the cut-out, the catch being arranged in a peak region of the bow.

Abstract: An impact printing mechanism which contains a great number of printing types in a minimized spacing is disclosed. Types are arranged in rows of columns on a plurality of substantially planar type carrying elements which are accommodated in equally spaced parallel relationship in a removable casing. Selection of a type is attained by three dimensional movements including horizontal movements of the elements within and perpendicular to their planes and a vertical movement of an element within its plane.The type carrying elements are carried on a carrier while a print hammer is mounted on an independent carrier. The former carrier includes an outer section and an inner section mounted for movement on the outer section, and means for lifting a type carrying element is mounted on the outer section.