Abstract: The tube includes an improved shadow mask contoured with step risers therein separating active portions of the mask. The risers are aligned with electron beam paths within the tube.

Abstract: If in a television camera tube the gauze-shaped electrode which is tensioned before the signal plate is assembled in a damped mass-spring system, in which the ratio of the mass of said system to the mass of the gauze should be larger than 30, while the fundamental frequency of the gauze and the natural frequency of the mass system differ less than 10% from each other and the damping of the mass spring system is so large that the time necessary for a decrease in amplitude of 20 db of the vibration of the mass of the mass spring system is smaller than 0.5 second, a tube is obtained having a low microphony.

Abstract: A method for making a color imaging device that comprises means for sensing radiation comprising a planar array of charge-handling semiconductive photosensors, at least some of the photosensors having a radiation sensing area with at least one dimension less than about 100 micrometers, and superimposed thereon, filter means for controlling access of radiation to the sensing means. The filter means comprises a transparent, polymeric dye receiving layer for receiving heat-transferable dyes and further comprises a plurality of radiation intercepting means defining a planar array of filter elements lying in the receiving layer in micro-registration with the sensing areas of the photosensors. The filter area of each intercepting means contains at least one heat-transferable dye transferred to the dye receiving layer by heating and diffusion. The heat-transferable dye absorbs radiation in at least one portion of the spectrum and transmits radiation in at least one other portion of the spectrum.

Abstract: A color picture tube is disclosed which comprises an electron gun for emitting an electron beam and a shadow mask including a plurality of slots and a plurality of bridges each interposed between adjacent slots along the longitudinal axis thereof. When X and Y axes are assumed passing through the central point of the surface of the shadow mask in the direction of horizontal deflection of the electron beam and passing through the same central point in the direction perpendicular to the X axis, respectively, the angle that each bridge forms with the X axis as viewed from the electron gun is determined in relation to the incident angle of the electron beam impinging upon the bridge, in accordance with the distance of the bridge from the X and Y axes.

Abstract: A target and target assembly for a camera tube in which a semiconductor plate is provided on an annular support and consists of a semiconductor monocrystalline edge portion which comprises an integrated circuit for handling the electrical signals originating from the target, the central part consisting of a radiation-sensitive layer having one or more radiation-permeable electrodes. The electrodes are connected to inputs of the intergrated circuit of which the leads necessary for supply and control voltages are led through. A window is provided on the electrodes and overlaps the inner edge of the support, the window, the edge portion and the support adjoining each other in a vacuum-tight manner.

Abstract: In the manufacture of a capsule for a sealed beam lamp or vehicle headlight, two coiled filaments on lead-in wires are supported in a holder with sufficient rigidity to accurately maintain a predetermined spacing between the filaments during a subsequent press sealing operation. The filaments are then inserted into an open-ended glass tube and the open end is press sealed onto the filament lead-in wires at the same time that wire supports are embedded in the press seal. The wire supports are then connected to mounting rods in the finished capsule.

Abstract: Across the screen is a mosaic of phosphor bodies which will emit light of different colors when excited by electrons. Phosphors which will emit three different colors, e.g. red, green and blue, are used and are disposed in a regular repetitive array of groups of three, i.e. triads. In every other triad the phosphor body which emits the color which has the least acuity to the eye, e.g. blue, is replaced by a nonluminescent black material. This black material is used to hide the edges of a support wall which extends to the screen.

Abstract: This application depicts a rectangular-type color cathode ray tube having a rearwardly flanged faceplate for suspending an approximately rectangular shadow mask assembly on the faceplate flange at a predetermined spacing from a screen-bearing surface of the faceplate. The mask assembly comprises a rigid frame to which is attached a shadow mask member; also, there are a plurality of mask suspension devices spaced around the assembly. At least one of the devices comprises a metal stud embedded in and extending inwardly from the faceplate flange, and mask-mounted means for retentively engaging said stud. The mask-mounted means comprises a sheet metal bracket integrally formed from the mask assembly so as to extend radially outwardly from the assembly; it also comprises a discrete metal leaf spring affixed at one end to the distal end of the bracket means and having provision on its distal end for retentively engaging the stud.

Abstract: At one of the vacuum tube is disposed an opaque photocathode receiving light from a window in the other end of the tube along a light axis which is spaced from and parallel to the axis of the tube. An accelerating mesh adjacent the photocathode rapidly accelerates the light produced photoelectrons in cooperation with an oblique electron lens along a path having an angle which is oblique to the light axis and tube axis toward a target or readout device. A field mesh adjacent the readout device accelerates the photoelectrons after being deflected by deflection plates to the readout device to provide an output photoelectron streak image thereon.

Abstract: A cathode-ray tube of the vertical line screen, slit apertured mask type includes a mask wherein the horizontal curvature of the mask is made greater than that suggested by the prior art for similar type tubes. Because of the added curvature, the degree of electron beam misregister caused by mask doming is reduced. To obtain acceptable packing of the screen lines, the horizontal center-to-center spacing between adjacent apertures in the mask are varied in relation to the difference in mask-to-screen spacing with respect to the prior art. The additional mask curvature need not necessarily be in a single arch but also may take the form of parallel extending corrugations in the mask.

Abstract: An X-ray tube including an envelope enclosing a flat-edged anode disc rotatable and axially reciprocable and further enclosing an electron beam source for projecting electrons along a beam axis toward the edge of the anode disc. The beam source is disposed to direct its beam at an acute angle of incidence to the edge of the anode disc and produce X-rays which are transmitted through a window in the envelope.

Abstract: For use in a cathode ray tube, an electron gun for generating at least one electron beam, the gun being characterized by having an elongated discrete arc suppression resistor mounted on an anode electrode of the gun in cantilever fashion at a point spaced from the beam so as not to interfere therewith, the resistor extending substantially axially and supporting on the distal end a getter strap to which it is electrically connected, the getter strap in turn supporting a getter pan assembly containing a vaporizable getter material.

Abstract: High pressure discharge lamps containing a fill of mercury and metal halides, having a power input of 250 watts or below and useable for general illuminating purposes achieve higher efficacy by developing high end temperatures without excessively obstructing the transmission of light and without creating excessive thermal losses through radiation and conduction. To reduce the obstruction of light, heat-conserving coatings on the lamp ends are preferably omitted and small neck seals are used which serve also to reduce thermal losses. The lamps are constructed with an aspect ratio of arc chamber length to diameter from 0.9 to 2.5 and with an electrode insertion factor from 0.1 to 0.6 and operate with a wall loading from 10 to 35 watts/cm.sup.2 and with an arc loading from 60 to 150 watts/cm.

Abstract: Improvement is provided in a color cathode ray tube of the post-deflection acceleration type, in the form of an operational system including related tube geometry. An electron barrier, consisting of a metallic film having a defined voltage penetration threshold, is adheringly disposed on the surface of the screen. The potential on the screen is in the order of substantially 20 to 40 kilovolts while the potential of the related color-selection electrode is more than substantially 72 percent and less than 85 percent of the screen potential thereby effecting a definitive voltage differential (.DELTA.V) therebetween that is substantially equal to or less than the voltage penetration threshold of the metallic film. The improvement in the system provides enhanced contrast and color purity in the screen display and minimizes background luminescence of the screen resultant from spurious impingement of secondary electrons generated in the tube.

Abstract: An electron beam tube having a cold cathode capable of being used as a caa tube or a display tube. The tube is constructed of two sections which are fitted together in a vacuum. The first section includes the tube neck and face section and an annular opening having a taper at the end thereof. The second section houses the cold cathode and a surface contact area for abuttably engaging a resilient electrical connector housed in the first section. The second section is forceably fitted over the taper on the first section to effect a vacuum tight seal.

Abstract: A bistable storage cathode ray tube wherein the bistable storage target thereof has a conductive layer provided on an insulating support member, the conductive layer including a multiplicity of collector electrode members having insulating material covering at least the collector electrode members except for an area thereof. A layer of storage dielectric material is provided on the conductive layer and the insulated collector electrode members extend through the layer of dielectric material. The exposed conductive area of the collector members collect secondary electrons emitted from written areas of the dielectric layer and provide a substantially uniform potential over the target surface. The interface between the dielectric layer and the insulating material around the collector electrode members provides isolation between the dielectric layer and the collector electrode members thereby minimizing luminance around the collector electrode members.

Abstract: A photocathode internally processed image intensifier inverter tube includes a cathode housing having an outer side wall forming a cylindrical opening for connection to the photocathode of the inverter tube. The side wall forms a cylindrical cavity in which the photocathode is received. A pair of flat wall surfaces are formed in the side wall. The flat surfaces are spaced radially inwardly such that the distance from the surfaces to the center of the cylindrical opening is less than the radius of the cylindrical opening. A tubular processing side arm is attached from each flat wall surface and are used to introduce antimony and alkali metal vapor, under a vacuum into the cathode housing for the deposit of a photosensitive coating on the photocathode substrate. After forming the photosensitive surface, the side arms are sealingly pinched off at the ends thereof to maintain a vacuum inside the inverter tube.

Abstract: An image tube equipped with a fluorescent screen comprising a phosphor layer coated on a transparent substrate, a conductive porous substance layer formed on the surface of the phosphor layer, and a conductive solid substance layer formed on the surface of the porous layer. The image tube exhibits improved contrast and brightness.

Abstract: A liquid level monitor using the difference between the refraction of light by a prism in contact with air and by the same prism in contact with liquid being monitored to give warning of low liquid level. In preferred form for monitoring engine oil level, light is transmitted to a prism by an incoming fiber optic lead and returned from the prism by a return fiber optic lead. When the oil level is normal, the prism is in contact with the oil and the incoming light is transmitted into the oil and dissipated. When the oil level drops, the incoming light is reflected by the prism to the return lead and the reflected light is used to provide the indication of low oil level.

Abstract: An image display comprising a viewing screen including a layer of phosphor particles emissive of light of a particular visual color and color filter particles transmissive of light of that color .Iadd.partially .Iaddend.covering .[.between 20 and 80 percent of.]. the surfaces of the phosphor particles.