Abstract: A shallow electronic image display device having a trough-shaped display screen of glass with a slightly convex exterior surface and a planar phosphor coated interior surface with a peripheral side wall terminating in an edge defining a common plane in sealing relation with a matingly configured peripheral flange of a tray-shaped metallic back case to form a chamber. Disposed within the chamber within the back case is an areal cathode structure in generally parallel relation with the interior surface of the screen with a plate-shaped electron beam control structure in parallel relation intermediate the interior surface and the areal cathode structure. A tensioned metal band encircles the side walls of the display screen to provide implosion protection.

Abstract: A photoconverter wherein luminous substances having at least the atomistic property are dispersed among transparent intermediate substances substantially as individually isolated and as fixed together therewith so that, upon incident of light, the photoconverter is excited to cause each exciting photon to emit two or more photons for realizing multi-quantum emission.

Abstract: An x-ray image intensifier having a tube bulb and an output window being mounted in a metal frame. The frame is inserted into the tube bulb and attached to the tube bulb in a region of the output window characterized by the output window being a glass window having a luminophor layer applied thereto, the output window being connected to the frame by only a single metal solder connection of soft solder so that the pane having the luminophor layer can be soldered to the frame without damaging the luminophor layer. Preferably, a peripheral edge of the window pane is free of the luminophor layer, and this peripheral edge has at least one adhesive layer deposited at the location for the solder connection.

Abstract: The present invention relates to a cathode ray tube having a black matrix phosphor screen. In the cathode ray tube of the present invention, a film whose main component is oxide film is formed to cover a carbon layer of a black matrix formed on the inner surface of a face plate and a phosphor layer is formed on this film. Consequently, even if the carbon layer is thin, the carbon layer can be prevented from being burned and made white in the baking process so that a black matrix phosphor screen of high definition can be obtained. Thus, it is possible to provide a color cathode ray tube of high definition black matrix type type which is good in quality.

Abstract: The present invention relates to an electroluminescent display device with polychromatic emissions which comprises one photo electroluminescent layer containing a composition of Na.sub.0.5 Tb.sub.0.25 Eu.sub.0.25 WO.sub.4 which is combined with an existent fluorescent layer, the thickness of which is one-third that of the fluorescent layer.

Abstract: An electrode structure used in a glow discharge system for nitride hardening of metals. The structure includes an anode plate, a cathode plate, a conductor connected to the cathode plate and an insulating dielectric shroud which surrounds the conductor. The two plates are firmly attached to the dielectric shroud so as to prevent any air gaps across which an arc may form. The shroud includes a plurality of annular grooves at one end to prevent the surface of the shroud from being covered by extraneous matter which would allow an arc to form between the plates.

Abstract: In a color cathode ray tube, a vacuum envelope is provided with a plurality of necks and a plurality of funnels for coupling the respective neck to a single panel. A plurality of electron gun assemblies are received in the neck, respectively and a plurality of deflection yokes are mounted around the funnels, respectively. A screen is formed on the inner surface of the faceplate of the panel and is defined by a plurality of continuous segment regions each of which is scanned with electron beams from the corresponding electron gun assembly and deflected by corresponding deflection yoke. A shadow mask is received in the panel and is faced to the screen. The shadow mask has a plurality of effective row and column regions corresponding to the segment regions and a noneffective region for surrounding and partitioning the respective segment regions.

Abstract: An improved getter assembly for use in cathode ray tubes, and particularly in cathode ray tubes that require a clear area or window, the getter assembly including a container with getter diffusion directing tabs extending from the sidewall of the container in a direction away from the window area.

Abstract: In a color cathode ray tube, a panel having a single faceplate is coupled to a plurality of necks through a plurality of funnels, respectively. A plurality of electron gun assemblies are received in necks and a plurality of deflection units are mounted around the funnels, respectively. A screen is formed on an inner surface of faceplate and has a plurality of continuous segment regions each of which is scanned with the electron beams emitted from the corresponding electron gun assembly and deflected by the corresponding deflection unit. A shadow mask is so supported in the panel as to face the faceplate. The electron gun assemblies adjacent each other so arranged as to have a relative distance GS between the central axis thereof:GS=m.multidot.

Abstract: A tubular incandescent lamp for use in heating applications where multiple levels of infrared energy are available from one source while providing for compactness in size and ease in manufacturing. The primary use for such a lamp is in the fusing system of a photocopy machine where speed in attaining the desired operating temperature greatly determines the machine's rating. In one embodiment of the lamp, quartz envelope is provided with dual chambers extending longitudinally therethrough. A filament extends longitudinally through each of the chambers and is hermetically sealed within press-sealed ends at the opposed ends of the lamp. The filaments are capable of being selectively or simultaneously activated.

Abstract: A front assembly system for a tension mask color cathode ray tube is disclosed wherein a novel high-voltage conduit is formed between the funnel coating of the tube and the mask to a shadow-mask supporting frame. Also, a magnetic shielding combination is formed comprising an internal magnetic shield and the frame. The magnetic shield effectively extends from the inner surface of the faceplate through the frame and into the funnel a predetermined distance. The frame multi-functionally serves to mechanically support the mask, the shield and the interconnecting means to electrically interconnect the conductive funnel coating, the conductive screen and the mask, and to magnetically interconnect the shield and the mask. The magnetic shielding combination according to the invention is formed by the frame and the shield to enhance the shielding of the electron beams from stray magnetic flux transverse to the tube axis.

Abstract: A color television display tube including an electron gun system (5) in an evacuated envelope for generating three electron beams whose axes are co-planar. The beams converge on a display screen (10) provided on a wall of the envelope and are deflected in the operative display tube across the display screen into two orthogonal directions. The electron gun system (5) has correction elements for causing the rasters scanned on the display screen by the electron beams to coincide as much as possible. The correction elements include annular elements (34) of a material having a high magnetic permeability which are positioned around the two outer beams. In addition a further correction element (38, 38", 38"') of a material having a high magnetic permeability is provided around the central beam in a position located further from the screen in order to correct field coma errors at the ends of the vertical axis and in the corners to an equal extent.

Abstract: A conductive connector arrangement for use in a CRT comprising a funnel having an internal Aquadag coating, a faceplate having a luminescent screen deposited upon its display surface, a ring formed of a non-conductive material having at least one recess thereon and interposed between the funnel and faceplate for supporting a mask in registration with the screen and an internal magnetic shield disposed within the funnel. The connector arrangement serves to establish the Aquadag, the screen, the mask and the shield at a common electrical potential. To this end the connector comprises a clip formed of a resilient conductive material and configured for retention in the ring recess. A first contact supported by the clip effects a conductive engagement between the screen and the clip. A second contact, also supported by the clip, effects a conductive engagement between the funnel coating and the clip. An electrical connection is effected between the clip and the mask.

Abstract: A photomultiplier includes a solid disk dynode and a pair of annular guiding electrodes disposed about the disk dynode transversely along the central axis of the photomultiplier tube on opposite sides of the dynode. The secondary and subsequent dynodes may be of conventional (e.g. venetian blind) construction or of solid disk construction. The solid disk dynode and guiding structure exhibits improved photoelectron pulse-height resolution and a better signal-to-noise ratio than a conventional venetian blind type dynode. In addition, the solid dynode structure is less susceptible to physical shock than conventional photomultiplier dynode designs.

Abstract: An energy-efficient lamp having a waveguide mounted to the envelope of the lamp which may be of the incandescent type. The waveguide passes visible radiation and reflects infrared radiation. The waveguide may be a reticulated layer of an electrically conductive material such as silver and the reticulations may be regularly or irregularly distributed over the surface of the envelope.

Abstract: In construction of a shadow mask for color picture tubes, use of Invar for the shadow mask suppresses thermal deformation caused by electron beam impingement and provision of a four pole magnet frame surrounding each mask aperture causes increased convergence of electron beams, thereby enabling production of images with high resolution and brightness.

Abstract: A cathode ray tube having a face plate including a fluorescent screen formed on the inner surface of the face plate. A conventional metal backing layer backs up the fluorescent screen. The improvements of the present invention are involved with the composition of the fluorescent material composition which includes fluorescent particles and not less than 0.6 parts by weight of SiO.sub.2 per 100 parts by weight of fluorescent particles in that portion of the material which contacts the face plate, the amount of SiO.sub.2 being insufficient to cause the brightness of the fluorescent particles to deteriorate, and not more than 0.3 parts by weight of SiO.sub.2 per 100 parts by weight of fluorescent particles in that portion of the fluorescent material which faces the metal backing layer.

Abstract: An electrodeless arc lamp comprises an outer jacket hermetically sealing and thermally protecting an arc tube inside which has an upwardly convex bottom center section. The absence of chemically reactive electrode material makes it possible to use metal halides other than iodides. The tube contains chlorides, bromides or a mixture thereof of scandium and sodium in a nearly equimolar relationship in addition to mercury and an inert gas. Good color balance can be obtained at reduced reservoir temperature and with less power loss. Reduction in wall temperature makes it possible to attain longer lamp life.

Abstract: An improved metal-to-ceramic seal is provided wherein the ceramic body of the seal contains an integral region of cermet material in electrical contact with the metallic member, e.g., an electrode, of the seal. The seal is useful in high voltage vacuum devices, e.g., vacuum switches, and increases the high-voltage holdoff capabilities of such devices. A method of fabricating such seals is also provided.

Abstract: An improved suntanning fluorescent lamp having a spectral energy distribution of substantially UVA and UVB radiation. The spectral energy distribution substantially approximates natural sunlight below about 400 nanometers. Preferably, the lamp comprises a predetermined amount of a phosphor blend comprising cerium-activated strontium magnesium aluminate, europium-activated strontium pyrophosphate and europium-activated barium pyrophosphate.