A cathode ray tube has an evacuated shallow envelope provided with a flat screen, and an electron gun is arranged to direct an electron beam into the envelope from one edge thereof in a direction which is substantially parallel to the plane of the screen. The beam is deflected by controlled deflection electrodes towards the screen to control the distance from said edge at which the beam impinges on the screen. An electrode arrangement is provided in the envelope for deflecting the beam towards t...

A direct viewing bistable storage tube is described in which post-deflection acceleration of the writing electron beam is employed to provide a high writing rate during conventional nonstorage operation without affecting the storage operation by separating the flood electrons from the high acceleration field in space or time. This is achieved either by positioning the post-deflection acceleration electrode between the output of the beam deflection means and the flood gun so that the low velocity...

A pair of dielectric plates have control electrodes formed on oppositely positioned broad surfaces thereof, there being an evacuated narrow space formed between such surfaces to provide paths for an electron beam between a cathode and a target. Such surfaces have conductive control electrodes formed thereon, the electrodes on one of the plates including paired electrodes arranged in a coded finger pattern defining electron beam channels between the cathode and target. The electrodes encompass su...

A feed chuck for a machine tool including a tubular body member, a plurality of radially spaced, longitudinally extending slots in said body member, spring means in each of the slots each having one end fixed in an end of its slot and having its middle portion bowed inwardly of the body member for engagement with bar stock, movable spring compression adjusting means engaging the body member and engaging the other ends of the spring means for further inwardly bowing each of the spring means to va...

With this invention, corona inception voltage in uninsulated overhead lines is detected by placing a sensitive direct current galvanometer in position to detect the change from negative to positive space charge around the overhead conductor when corona discharge begins. The galvanometer, with low pass filters, is placed in series with the power line, and the low pass filters prevent the relatively heavy capacitive alternating current from flowing through the direct current galvanometer coil.

Water-permeable porous sheet structures are prepared by adding an inorganic filler which has a shaken volume of from 3 to 20 cc. per gram into a solution of a polyurethane urea and then treating the polyurethane-urea solution with a nonsolvent which is miscible with the solvent and shaping the solution to form a water-permeable porous sheet structure with removal of the solvent and the nonsolvent.

A chuck for removably holding a drill bit or like tool element, including a conical sleeve and a plurality of jaws biased apart and away from the tool element against the inner sleeve face by compression springs, the sleeve being threaded onto a spindle and a thrust disc between the spindle and jaws operable upon sleeve rotation to shift the jaws axially of the sleeve to either tighten the jaws against or release the tool element, and a collar keyed to the spindle but movable axially along the s...

A process for improving the shear strength of a graphite fiber-resin matrix composite wherein the fibers are coated with a catalyst and are heat-treated in a halogen-containing atmosphere at a temperature above 300.degree. C.; such composites being useful as structural materials.

Chuck includes cylindrical housing with central bore and two sets of holes extending from the bore to side surface of housing, said sets being spaced apart axially of the housing and the holes in each set being spaced apart circumferentially thereof. Actuating pistons are disposed in said holes and project from side surface of housing, and a drive piston is disposed in bore between two sets of holes. A collar is mounted on housing for movement axially thereof and has on its inner side cam surfac...

A semiconductor device for producing radiation in response to incident radiation of wavelength is made of a sandwich of semiconductor materials providing electrically in series a radiation detector which responds electrically to incident radiation, a capacitor for integrating the effect of the incident radiation and a radiation emitting diode which produces output radiation of a different wavelength and of intensity representative of the intensity of the incident radiation.