Abstract: A solid state, touch sensitive position sensor, which sensor includes a conductive surface along the boundaries of which are disposed at least two sets of two elongated current distribution and collection means. The touch sensitive position sensor further includes resistance means operatively disposed so as to interconnect said current distribution and collection means with said conductive surface. The current distribution and collection means and resistance means are configured, so as to (1) provide a substantially linear electric field distribution of equipotential lines and (2) sequentially turn one set of said current distribution and collection means on while turning the other sets off. In an important embodiment, the conductive surface is formed immediately atop a copyboard and by utilizing erasable, felt tip markers having metallic inserts therein, visual images as well as electrical signals, indicative of X-Y coordinate location, may be simultaneously generated.

Abstract: The impact velocity with which a single element printer prints is determined by the velocity with which the printing element is propelled toward the record sheet. The mechanism disclosed herein is capable of adjusting the velocity with which a print element is projected toward the page such that the impact velocity and, thus the impact forces which are related to the velocity, are controlled and varied to provide a minimum of compromise with respect to printing forces and, thus, print quality. The control of the velocity with which the print element is propelled against the record sheet is accomplished by a cam which rotates with the print element during character selection and has thereon a plurality of rises corresponding to a displacement of a cam follower engaged with a print cam. The print cam is formed to present, in a plurality of different planes perpendicular to its axis, a like plurality of cam profiles and rises.

Abstract: A device is disclosed for shifting a bifurcated rack from one position to a second position, thereby engaging alternate sides of a bifurcated rack member with a pinion in a spacially fixed position. The rack shift mechanism is controlled by a direct link to the keyboard of the typewriter which responds to movement of a shift key lever. The mechanism performs a force multiplication and, at the same time, a displacement division function to reduce a relatively large key lever and link displacement to a relatively small rack displacement with a correspondingly higher force factor. The force multiplication linkage translates the rack of the rack/pinion pair to engage the alternate portion of the rack, thereby reversing the rotation of the pinion and allowing the selection from the opposite hemisphere of the type element in response to a selection output.

Abstract: In rackets for tennis and like games, a string network consisting of longitudinal and cross strings interwoven alternately to construct a regular `basket weave` pattern at the center of the striking face and woven in a special manner at the sides and at one or both ends of the string network. At the sides the cross strings are woven over and under two or three longitudinal strings with consecutive cross strings alternating the over and under pattern. At the ends, above and below the said center striking area, two or three cross strings are woven identically and farther outward towards the ends of the string network, the over and under pattern is alternated with one, two or three consecutive cross strings.