Abstract: A printout device for calculators and the like includes a plurality of print segments, each encased in elastomer and embedded in a rigid block with the lower, indicia forming ends flush with the lower surface of the block. The upper end of each print segment is provided with a diametrically extending slot. Disposed above each print segment and axially aligned therewith is an electromagnetic driver element which is provided with a diametrically extending bar or key projecting from the lower surface thereof. With the electromagnet unactuated, downward pressure applied to the upper surface of the block will drive the key into the aligned slot so that no force will be transmitted to the printing segment. Actuation of the electromagnet will cause the key to be attracted to the upper extremities of the printing segment as it approaches it, causing the key to misalign with the slot and impinge on the upper surface of the printing segment.

Abstract: A device for printing in association with hand-held calculators comprises a pair of vertically stacked blocks joined by a elastomer layer, the lower block formed of elastic material. Vertically embedded in the lower block is an array of digit forming segments, each having a raised central portion extending above the upper surface of the lower block. Embedded in the upper block is an array of needle electromagnets, each aligned with a digit segment. Interposed between each electromagnet and its associated digit segment is a sloping channel in which a small ferromagnetic actuator is slidably disposed. Selective actuation of the electromagnets latches the actuators in position to transmit force from the upper block to the raised central portion of the respective digit segment. As the blocks are manually forced downward toward the printing plane a lever device tilts the blocks to allow unlatched actuators to slide out of force transmitting position.