Abstract: A device for determining the direction of a fluid spray pattern issuing from a fluid nozzle prior to flowing through the nozzle includes a body in the form of a template or a jig releasably attachable in a predetermined orientation to the nozzle tip. The body includes a pair of angularly related adjustable arms having axes which intersect the nozzle aperture and which extend such that the central axis of the nozzle bisects the angle between the arms. By applying the device to the nozzle tip in predetermined orientation, the arms define the lateral extremities of the spray pattern.

Abstract: The invention is a magnetically actuated clapper-style armature wire matrix print head. A light weight highly reliable and low cost design is achieved by utilizing single molded parts wherever possible. A unitary molded straight line channel wire matrix wire guide is molded as a single part. The flux return member is a single formed part with attached magnetic cores. The magnetic cores have thermal contact with an attached or integral heat sink that extend from the flux return member in the axial direction with the cores and which may be integrated with the support frame for the print head structure. A rebound absorbing backstop member receives the armatures on the rebound but also serves as a means of maintaining pivotal contact between the end of the armatures and the top edge of the flux return member so that a continuous flux path from the flux return member, through the armature and down through the cores of the electromagnets can be attained.