Teletype Corporation

Other

David G Geis

Ingard B Hodne

Joseph A Bellino

Jerome L DeBoo

Arthur F Lindberg

George H Bleeker

The drive mechanism for a paper tape punch and reader assembly utilizes tape drive assemblies which move the paper tape in response to the application of continuous periodic motion and control signals. The periodic motion serves to oscillate a rocker plate between first and second limits and the control signls serve to selectively engage and disengage a detent which effects coupling between the drive shaft and the source of periodic motion. The periodic motion is imparted to the drive assembly by a connecting link which in turn is driven by an adjustable eccentric. The eccentric comprises a pulley plate which is fixed to a shaft. A circular body is adjustably movable with respect to the pulley plate and is arranged to engage the race of a ball bearing assembly which further comprises balls and a retaining ring. The connecting link has a circular opening which provides a snug fit to the exterior of the retaining ring. The pulley plate and the body are held in a fixed physical relation by two locking screws and the relative position of the two is established by an eccentric which is mounted on one of the locking screws.

Paper tape punch assembly

A guide system for arranging a plurality of print wires from a converging arrangement into a parallel arrangement aligned with a column of dot locations to be printed on a record medium, the guide system including a first guide more remote from the record for bearing against the wires as they are bent into a direction perpendicular to the record medium. And a second guide nearer the record medium than is the first guide, for applying the bending force to the wires to bring them into alignment perpendicular to the record medium. A final guide still nearer to the record medium finally assures that the wires are in a straight, columnar line as they face the record medium. The first and second guides are freely movable in a plane substantially perpendicular to the final direction of movement of the wires, thereby accommodating some transient movement of the wire ends and to accommodate unbalanced bending forces of the wires due to an unequal number of wires approaching the guide from each side of the axis of movement of the wire ends.

Guide system for wire matrix printing

An armature locating and holding structure in which the armature only partially overlaps one of the magnetic poles so as to produce a magnetic tensile force on the armature tending to pull the armature toward the partially overlapped pole and a magnetic gap tending to apply a rotational balance force so as to pull the armature structure toward a pair of stops that limit movement of the armature toward the partially overlapped pole and also limits the rotation of the armature by reason of the magnetic gap.

System for mounting an armature

A wire matrix printer includes a print head having one or more banks of a plurality of generally horizontal, vertically spaced print wires arranged parallel to each other for linear reciprocation toward and away from a recording surface by associated actuators. The print wires in each bank are of progressively varying length so that the wire associated with the actuator furthest from the recording surface is the longest and each adjacent wire is a predetermined amount shorter than the preceding wire. Outer or actuator ends of the wires define a vertically spaced and stepped array. The actuators in each bank are also in an array vertically spaced and stepped and are respectively coupled to the outer print wire ends by armatures. The inner or printing ends of the wires define a vertically spaced, nearly planar array near the recording surface, and a spaced, planar array at such surface. If there is more than one bank of print wires, the banks are angularly spaced from a line extending perpendicularly from the recording surface, and the inner ends of the wires in each bank are alternately interleaved near the recording surface. The actuators in each bank include the armatures, as well as torsion springs, a pair of pole pieces, a permanent magnet and an electrical coil. The armatures are mounted to the pole pieces by both the torsion member and the magnetic attraction of the permanent magnet for generally horizontal, pivoting movement. The pole pieces are magnetized by the permanent magnet to normally attract and hold each armature adjacent thereto against the action of its associated torsion spring thereby storing potential energy therein. The flux of the permanent magnet is selectively counteracted, or neutralized or cancelled for a selected armature by energization of its associated coil to rotate the armature on and about one of its pole pieces for impacting the inner end of the print wire coupled thereto against the recording surface due to conversion of the potential energy stored in the torsion spring to kinetic energy of the armature. Further details relate to the positioning and geometry of the print wires, the armatures, the pole pieces, the permanent magnets, and the coils in certain environments, such as in print heads of a wire matrix printers.

Actuator mechanisms for wire matrix printers

A centralized system for simultaneously monitoring a plurality of predetermined remote areas and selectively indicating an unauthorized intrusion into any of the areas. A preamplifier is placed in each of the areas for amplifying the electrical signals from each of a set of microphones in that area and the amplified signal is coupled to a central monitoring and alarm station. The central station may provide a sound level indicating lamp for each area, an alarm lamp to indicate when the sound in each area exceeds a predetermined background or threshold level, and a system for simultaneously listening to the actual sound in all of the remote areas or selectively listening to the sound in any one of the areas.

Growing community of inventors

Chicago, IL, United States of America

David G Geis