A printing head device including movable elongate marker elements projectable against an anvil during striking of a selected character is disclosed. The device includes generally flat cross-section electromagnets disposed radially within a common section of a cylindrical body and each electromagnet has a movable low inertia armature for actuation of the marker elements. This arrangement improves the operating conditions of the printing head.
A wire matrix ballistic impact print head for delivering printing impacts to a record medium under control of information format control circuitry and including a plurality of impact print wires or styli, a guide for translating the plurality of styli from a circular arrangement at the impact delivering end of the styli, a plurality of electromagnetic actuators for selectively driving the styli during a print cycle of operation of the print head, and a unitary connector for maintaining the armature of each electromagnetic actuator in proper positional alignment with a print stylus, for simultaneously adjusting all armatures to approximately the same de-energized position, for preventing bounce of the armature after an energized actuator is de-energized and for establishing a reference plane to which all styli are referenced.
A matrix print head comprises stylus guide means; a plurality of electromagnetic structures coupled to the guide means, each of the electromagnetic structures including a pole piece; a plurality of armatures disposed radially about the guide means, each of the armatures being associated with one of the electromagnetic structures to form an electromagnetic actuator for transferring electromechanical energy to a stylus, and each of the armatures having an inner end and an outer end projecting outwardly of the associated pole piece; a plurality of styli respectively associated with the plurality of armatures, each stylus being carried by the guide means and having an armature engaging end for engaging the inner end of the associated armature and a printing end for impacting a record medium when the stylus is propelled through the guide means by energization of the associated electromagnetic actuator; and an improved armature retainer coupled to the guide means for maintaining each armature in engagement with its associated pole piece. The armature retainer comprises a relatively rigid base member having a central portion connected to the guide means and a peripheral portion including means for receiving each armature at a predetermined location between its inner and outer ends; and a relatively resilient biasing member mounted to the peripheral portion of the base member for engaging the outer end of each armature in order to bias each armature into engagement with its associated pole piece.
In a mosaic printing head for applying lettering by means of needles which are ejected as the head is passed over a sheet of paper, the needles are accommodated in a tubular column of bearing metal. Near one end, the tube is formed with a transverse wall containing a circular arrangement of guide holes for the needles, each guide hole being slightly inclined towards the tube axis. The operative ends of the needles are arranged in a row and parallel to one another with the aid of an orifice member provided for the tube.
An arm in an information transmission device having a device for printing or punching holes in an information carrier. The arm is light weight, occupies less space, and operates at a higher speed than known devices of the same type. The arm is supported by a spring element and is adopted for use with an electromagnet whereby the arm is resiliently pivotable toward and away from the carrier in order to punch or print information on the carrier.
A wire matrix print head comprised of a plurality of impact print wires or styli, each having an input end for receiving an impact and an output end for delivering an impact to a record medium through an inking ribbon. The impact end of said wires or styli are arranged in a specialized elliptical format while the output end of the wire styli are formed into a planar straight line configuration, thus providing for a minimal amount of bending arc along the length of the styli. This configuration permits direct transmission of the impact forces to the output end and permits each stylus to be of equal length to the other styli. Efficacious provision is made for adjusting the stroke length of each stylus even though a uniform electromagnet for each stylus is used to provide the activating or impact impulse.
