Abstract: A carrier frame is provided for oscillation along a printing platen of the printer and is comprised of two integral, U-shaped sections facing each other at right angles. A plurality of electromagnetic actuators are arranged in one section and include a yoke, a coil, and a pivot armature in each instance. A free end of the pivot armature projects into the other small section. A relatively short print needle is guided in one wall portion of the second section and has its rear end abutment with the projecting end of the armature; an adjusting screw adjusts the relative disposition of the pin-like needle and the armature; the common pivot axis for all armatures is established by a resilient string in a cover plate across the larger U.

Abstract: A solenoid-type magnet drive, including a coil surrounding in parts an axially movable armature, and a housing for mounting the coil, further includes an attenuating device which comprises an attenuating disk positioned abutting centrally one end of the armature, when in a retracted position; two resilient rings hold the disk near its periphery and without play for preventing rebounding.

Abstract: A matrix line printer has an L-shaped shuttle for a series of electromagnetic actuators. Wires are provided running in an arc from the printer frame to the shuttle. Peojections on the shuttle engage eccentrically mounted rollers on the frame.

Abstract: A matrix line printer which includes a shuttle-carrier mounted in a frame for limited reciprocating movement and supporting a plurality of print elements; a plurality of rollers are journalled in the frame and arranged parallel to the direction of reciprocating movement of the shuttle, projections on the shuttle engage the rollers; a pair of circularly round, cylindrical guide pins are arranged in coaxial relation to each other and mounted to respective opposite ends of the shuttle, run in a pair of corresponding sleeve-like bearings; leaf springs on the shuttle urge the projection against the rollers; and additional springs are arranged transversely to the coaxial alignment of said pins for balancing purposes.

Abstract: A rotational movement of a constant speed drive is translated into a linear reciprocating motion having two relatively long, constant slope sections within a cycle, such section occuring in between two sequential reversals, and representing a constant speed. The speed modification is obtained by a universal joint-cross link with oblique axes and a crank output having a linear phase.