Abstract: A method for the mounting of a shadow mask in a trichromatic cathode tube pertains especially to the mounting of the mask on a frame. The shadow mask has a perforated, plane active surface which must be held under sufficient mechanical tension, so that it preserves its planarity during the functioning of the tube. The method consists in increasing the dimensions of the active surface, either by heating it to expand it or by stretching it mechanically to give it the desired mechanical tension, and then in soldering the mask to a sufficiently rigid frame to maintain the active surface in its state of mechanical tension.

Abstract: A color cathode-ray tube comprises an evacuated envelope having an electron gun for producing at least one electron beam and, preferably three beams, a phosphor screen and a shadow mask adjacent to the screen. The mask has an improved heat dissipative, electron reflective coating on its electron gun-facing surface to minimize the effects of overall mask doming and blister warpage. The coating comprises a compound selected from the group consisting of bismuth (tri)oxide-potassium silicate and tungsten-potassium silicate. A method of making and applying the coating also is disclosed.

Abstract: Means for suspending a color selection electrode from the display window of a color display tube, the means consisting of a first element which is connected to the color selection electrode, and a two-part second element connected to the display window. The second element consists of two separately made parts, a head and a base, enabling manufacture and placement of the head with a high degree of accuracy, and resulting in improved insertion reproducibility of the color selection.

Abstract: A faceplate assembly for a color cathode ray tube includes a glass faceplate having on its inner surface a centrally disposed phosphor screen. A metal foil shadow mask is mounted in tension on a mask support structure located on opposed sides of the screen and secured to the inner surface of the faceplate. The support structure according to the invention has an open side facing the screen filled with a reinforcing material effective to render the structure mechanically rigid and prevent flexure of the structure toward the screen under the tension of the shadow mask. A process for manufacturing the inventive structure is also disclosed.

Abstract: A method of manufacturing a color screen structure for a CRT. The color screen structure comprises a frame consisting of a pair of parallel supporting members and a pair of connecting members interconnecting the pair of supporting members at the opposite ends thereof, and a color screen member provided with a plurality of parallel slits in the color screening region thereof, a pair of slots formed outside the color screening region respectively alongside the opposite outermost slits, and a pair of grooves previously formed respectively along lines corresponding to the outer upper edges of the supporting members of the frame. The color screen member is welded to the supporting members of the frame so that the grooves extend respectively alongisde the outer upper edges of the supporting members, and then the unnecessary portions of the color screening member are torn off along the grooves.

Abstract: A process and material is disclosed for use in the manufacture of a tensioned mask color cathode ray tube which includes a faceplate having on its inner surface a phosphor screen, and having on opposed sides of the screen a support structure for the mask. The process comprises providing an apertured foil shadow mask characterized by being composed of a nickel-iron alloy, and securing the foil mask to the support structure while under tension and in registration with the phosphor screen. The process is further characterized by the subjection of the foil mask to a thermal cycle to partially anneal the mask to a state in which the mask has favorable magnetic and mechanical properties. The partial anneal may be accomplished as a discrete step prior to installing the mask on the support structure, or accomplished during, or as a result of, a thermal cycle in the process of sealing the tube.

Abstract: The invention relates to a mask-frame assembly for use as a color-selecting-electrode system in a color-television tube. The structure features of the mask allow for a simplified method of manufacturing such an assembly. The mask and frame are subjected to a common surface treatment in accordance with a particular temperature program after joining them together at given points by spot welding.

Abstract: A process of producing a color selection mechanism for a cathode-ray tube which eliminates operations such as heat treatment at a high temperature for annealing and processing with levellers, to simplify production steps and resolves problems of rejects and dependability due to segregation of components involved in the stamping operation of a conventional process. A color selection electrode having a plurality of electron beam-passing openings formed therein is merely bent within the elastic limit of the material of the electrode, without causing a drawing effect, into a curved facial shape having substantially a cylindrical face as a basic facial shape thereof, and is permanently mounted in the curved condition on a frame to form a color selection mechanism.

Abstract: A high performance color cathode ray tube is manufactured by welding a shadow mask under very high tension to a metal ring brazed to the tube envelope. The shadow mask material has a high yield strength and a thermal coefficient of expansion near that of the ceramic ring portion of the envelope to which it is secured.

Abstract: A method of manufacturing, and the structure of an improved electron beam selection electrode of a color cathode ray tube having a pair of arm members with a plurality of grid elements attached thereto and extended therebetween, and a pair of supporting members for the pair of arm members. The method comprises the steps of arranging a damper wire of predetermined length between a pair of fixing members, covering each end of the damper wire arranged on each end of the pair of fixing members with a pair of thin film tapes, respectively, welding both of the damper wire and the thin film tapes thereon to each one end of the pair of fixing members to provide a damper assembly, arranging a wire portion of the damper assembly over a surface of the plurality of the grid elements, and fixing each of the other end of the pair of fixing members to each of the pair of supporting members so as to suppress mechanical vibration of the grid elements.

Abstract: A glass faceplate for use in a color cathode ray tube has a target area with a pattern of phosphor deposits circumscribed by a sealing area, and a frame supporting a shadow mask with a sealing area geometrically matching the sealing area of the faceplate. Three indexing means are spaced apart along the sealing areas for indexing the faceplate in relation to the frame, providing a gap of predetermined width, and leaving at least one corner of the faceplate unsupported. Shims means having shimming dimension equivalent to or slightly less than the predetermined gap width is located in the gap at the unsupported corner, whereby the unsupported corner is supported by the shim means such that the predetermined gap width is maintained during tube fabrication even at the unsupported corner. A method for assembling a color cathode ray tube which utilizes the shimming means according to the invention is also disclosed.

Abstract: A method of manufacturing a focusing shadow mask for a color cathode ray tube is disclosed in which two conductive plates or surfaces, forming the electrode structure, are secured together by insulating material so that they do not contact each other. Strips or columns of insulating material are accurately located with respect to the matrix of apertures formed in the focus mask by etching cavities which may be in the form of grooves within at least one of the plates forming the electrode structure between adjacent aperture areas, and filling such accurately positioned cavities with a dielectric frit material, and then after firing such frit material etching away the surface of the plate so as to provide raised strips or pillars of insulator material firmly bonded and embedded in the mask structure.

Abstract: The novel method comprises (a) producing on one surface of a metal plate an array of substantially-parallel ridges, at least the tops of the ridges being electrically insulating, (b) producing an array of generally rectangular-shaped apertures through the plate in columns between the ridges and (c) producing electrically-conducting strips on the tops of the ridges.

Abstract: A cathode-ray tube shadow mask mounting system that allows the mask to be removed from the faceplate and replaced in exactly the same position as it occupied before removal includes screw-receiving inserts permanently embedded in the inner surface of the faceplate outside the viewing area of the display screen. Tubular screw guides are secured to the shadow mask frame in corresponding positions, the guides and the inserts having complementary beveled surfaces for drawing them into alignment when a screw is inserted through the guide and threaded into the insert.

Abstract: Resilient means on the mask frame of a cathode ray tube support the mask-frame assembly by mating with positioning studs embedded in the sidewall of the tube's viewing panel. To prevent permanent deformation of the resilient support means, mesas are formed adjacent to each means to beneficially limit their flexural movement necessitated by repeated insertion and removal of the mask-frame assembly during tube manufacturing.

Abstract: A method of making a mask structure including two or more masks for a color cathode ray tube, for example a mask-focusing color cathode ray tube, and the mask structure formed by the method. A plurality of apertured flat masks, each mask having an effective portion having apertures and non-effective portion surrounding the effective portion, are aligned and stacked with a predetermined gap. The gap is then filled with filling material, which solidifies thereby fixing the flat masks together. The fixed masks are simultaneously pressed into a predetermined curved shape. The filling material is then removed from the curved masks.

Abstract: A storage target is disclosed for use in a scan converter storage tube, direct view storage tube, etc. Included are a storage substrate in the form of a single crystal of sapphire, and a collector electrode in the shape of a directional pattern on a storage surface of the storage substrate. In order to afford a high writing speed the directional pattern of the collector electrode is oriented at an angle ranging from -45 degrees to +45 degrees with respect to the projection of the c axis of the single sapphire crystal on the storage surface of the substrate. The collector electrode is preferably in the form of electrically interconnected parallel stripes extending in the direction of the projected c axis.

Abstract: A method of making a mask arrangement including two (2) or more of masks for a mask-focusing color picture tube and the mask arrangement formed by the method. A plurality of apertured flat masks, each mask comprising an effective portion having apertures and a non-effective portion surrounding the effective portion, are prepared. The flat masks are aligned and stacked, then filling material is poured into the apertures. The filling material is solidified thereby fixing the flat masks together. The fixed masks are pressed into a predetermined curved shape. Then, the filling material is removed from the apertures and the masks are separated.

Abstract: A method of making a plurality of masks for a mask-focusing color picture tube is described. A plurality of apertured flat masks are aligned and stacked. The stacked flat masks are contacted by magnetic force and welded together. The welded flat masks are pressed into a predetermined curved shape at the same time. Next, the welded portions are cut off to separate each mask.

Abstract: The novel method of fabricating a color-selection electrode for a cathode-ray tube comprises a combination of step including providing substantially orthogonal sets of support members which cross at a multiplicity of locations to form an apertured array. At least one of the sets of support members are insulators. The method includes coating the array with a continuously conductive metal film except at the multiplicity of crossings and providing electrical terminals for each of the sets of coated members. A structure utilizing the novel method is also described.

Abstract: The novel method comprises (1) producing in one major surface of a metal masking plate an array of substantially-parallel grooves separated by ridges of plate metal, (2) producing in the other of said major surfaces an array of generally rectangular-shaped depressions opposite the grooves and extending only partially through the plate and less than the distances required to connect to said grooves, (3) filling the grooves with an electrically-insulating material, (4) removing the ridges of metal down to depths to connect with the depressions, thereby producing an array of substantially-rectangular apertures through the plate and electrically-insulating strips across the apertures and (5) covering selected surface portions of the electrically-insulating material with an electrically-conducting material. Before step (3), the surface of the grooves are coated with a resistive or semiconductive material, such as black iron oxide.

Abstract: This invention is directed to the making of an electrode assembly which comprises providing anode electrodes on one surface of a photosensitive glass plate, providing cathode electrodes on the opposite surface of said glass plate oriented transversely to said anode electrodes, and dissolving away the plate material in alignment with said anode electrodes forming slots extending between the surfaces of said plate, thereby placing said anode and cathode electrodes in operative relation with each other.