Abstract: An arc tube of fused silica for a metal halide arc discharge lamp including a fill for the arc tube comprised of a sodium halide, at least one additional metal halide, and an inert starting gas, the arc tube including a tube of fused silica having an inner wall defining an arc chamber, the inner wall of the tube having provided thereon a metal silicate coating which is vitreous and light-transmissive, and which is comprised of a silicate of at least one metal selected from the group consisting essentially of scandium, yttrium, and a rare earth element, and preferably which is the same metal as that of the at least one additional metal halide. Protection of the fused silica arc tube with the metal silicate coating reduces loss of the metallic portion of the fill by diffusion or reaction and corresponding buildup of free halogen in the arc tube.

Abstract: An electron emitting device with an insulating layer on a substrate. The insulating layer has a hollow part in which a conical electrode is formed. A conductive layer on the insulating layer has an aperture on the hollow part of the insulating layer. The hollow part is formed by etching utilizing an ion beam.

Abstract: A fluorescent display device including a laterally elongated matrix-like display section and a plurality of control electrodes arranged in juxtaposition to each other while a longitudinal direction thereof is defined in a short side direction of the display section is disclosed which is capable of increasing a duty ratio when scanning the control electrodes. A plurality of picture cells are arranged longitudinally and laterally at equal intervals, resulting in forming the matrix-like display section. A plurality of sets of picture cells in an oblique direction are connected together. The control electrodes are connected together at every predetermined interval. Thus, when the control electrodes are scanned and the anode conductors are fed with a display signal, the fluorescent display device carries out graphic display while selecting desired picture cells at a high duty ratio.

Abstract: The electric lamp has a glass lamp vessel in the wall of which current conductors of molybdenum or tungsten are accommodated, which extend to the outside. Exclusively where the current conductors are in contact with gas, they have a skin of their own phosphide. The skin protects the current conductors from being progressively oxidized. The lamps can easily be manufactured.

Abstract: An apertured shadow mask is curved so that the curvature is concave on the back surface. The front surface generally follows the curvature of the back surface but has an undulating profile with ribs separated by troughs. The local thickness of the shadow mask is greatest in the ribs, and becomes gradually thinner toward the center lines of the troughs. The ribs and the center lines of the troughs have a zig-zag configuration. As a result, the front surface and neutral plane of the shadow mask have both convex and concave areas, which reduces localized doming.

Abstract: The high-pressure discharge lamp has a filling in a discharge vessel (1) which includes a rare gas and a metal compound (2) chosen from hafnium halides and zirconium halides. The halide evaporates and discomposes to form incandescent, condensed metal particles. The lamp may be electrodeless and may in addition contain a buffer gas as a component of its filling. Alternatively, the lamp may have internal electrodes (13) and contain mercury (12) as a buffer gas. The lamp has favorable light generating properties, in particular a good color rendering, and in addition may have a very high luminous efficacy.

Abstract: A lamp base locking clip including a plate having a lip extending outwardly on one end, and a flat portion on the opposite end, is captured in a keyway formed in the glass neck of a lamp body. One of the lamp lead-in wires is welded to the flat portion of the clip and a rim on a lamp base shell is welded to the outwardly extending lip, thus forming a lamp-base assembly with good torque resistance and no lead-based solder.

Abstract: A field emission element in which the emitter has rectangular projections at its distal end capable of readily controlling the interval between electrodes in increments as small as sub-microns, in order to reduce the voltage at which the device starts field emission at the required level and to improve emission uniformity. An emitter (2,20), a collector (3,21) and a gate (5,22) are arranged on a substrate (1), which is formed with a recess (4) in proximity to the electrodes (2,3, 20,21) other than the gate (5). The gate (5) is provided in the recess (4).

Abstract: A high resolution, cathodoluminescent display screen or device and a method of producing such a display device is disclosed. The display screen includes a plurality of channel structures having longitudinal ends, a transparent medium formed in a plane to which the channel structures are fixed with one longitudinal end thereof oriented toward the plane of the transparent medium, and a cathodoluminescent material deposited on the channel structures whereby incident electrons and light generated by the incident electrons are directed along the channel structures. Preferably, the display screen also includes a mechanism for removing built up charge from the display screen, such as conductive channel structures and/or a conductive transparent medium. The cathodoluminescent material can include phosphors, and for producing a color display, different materials producing different colors would be used. In one preferred embodiment, the channel structures are tubules.

Abstract: An electric arc discharge lamp includes an elongated hollow tubular transparent envelope having a pair of opposite ends, a pair of electrode mounts respectively disposed in the ends of the tubular envelope, and a dosing capsule defining a hermetically sealed annular cavity containing a predetermined quantity of a dosing liquid therein. The dosing capsule has an inner edge defining an opening through the capsule for receiving a portion of one the electrode mounts therethrough such that the capsule is supported by the one electrode mount with the sealed annular cavity substantially surrounding the one electrode mount. The electrode mount includes a glass stem having inner and outer axially-displaced opposite ends, a pair of lead-in conductors extending through the glass stem and from the opposite ends of the glass stem, and an electrode supported between a pair of inner ends of the lead-in conductors adjacent to and spaced from the inner end of the glass stem.

Abstract: The present invention relates to a multiplier structure having a very compact shape and which can have the output electrodes of the channels arranged in any random direction. The multiplying structure (94) is a ceramic block obtained by baking a stack of ceramic sheets prepared beforehand with a view to forming cavities includes in the mass. Each cavity (21) is covered by a metal deposit connected to a lateral contact (23) by a conductor (24) printed beforehand on the corresponding sheet. The channels can have special geometries in order to have their output on several different surfaces (41, 46, 47) of the multiplying structure.

Abstract: A cathode-ray tube includes an envelope having a rectangular face plate and a rectangular, flat rear plate opposed to the face plate. A phosphor screen is formed on the inner surface of the face plate and has a number striped phosphor layers extending in parallel to one another, and a plurality of regions which are independently scanned by electron beams. A mask support mechanism for supporting a shadow mask in the envelope comprises first mask support members fixed to the inner surface of the rear plate and situated to face first longitudinal ends of the phosphor layers, second mask support members fixed to the inner surface of the rear plate and situated to face second longitudinal ends of the phosphor layers, and central mask support members fixed to the inner surface of the rear plate and situated between the first and second support portions. The shadow mask is supported on the mask support members while being applied with a tensile force in the longitudinal direction of the phosphor layers.

Abstract: A striped-screen tension mask color CRT has a flat glass face with stripes of trios of colored-light-emitting phosphors deposited on its inner surface. An associated strip-type shadow mask has a predetermined downward curvature from center to sides effective to alleviate degrouping of electron beams when the tube is activated.

Abstract: Electrostatic accelerator includes an accelerating column (20), a high voltage terminal (18) located at one end of said accelerating column and electric charge transport means, said transport means incorporating a high frequency accelerator such as a high frequency electron accelerator (54) able to supply an electron beam and means (56) for supplying the electron beam to the high voltage terminal, said electric charges being constituted by the electrons supplied by said high frequency accelerator.

Abstract: An EL lamp having a higher luminescence efficiency and a process for manufacturing the same are provided. The EL element includes an aluminum foil having at least one specularly polished surface, an anodized oxide film formed on the specularly polished surface of the aluminum foil, a light emitting EL layer formed directly on the film, and a transparent electrode formed on the light emitting EL layer. The process for manufacturing an EL lamp includes the steps of polishing specularly at least one of the surfaces of an aluminum foil, forming an anodized oxide film on the specularly polished surface of the aluminum foil, and forming directly on the aluminum oxide film a light emitting EL layer and a transparent electrode.

Abstract: A plasma compensation cathode includes a casing (1) accommodating coaxially with its outlet hole (2) a hollow holder (3) and a thermal emitter (4) with a central passage (5), a layer (10) of material chemically inert at high temperatures to the materials of the holder and emitter being interposed therebetween. The central passage (5) is blind at the side of admission of gas, and is communicated with the interior of the holder (3) by way of a through passage (8) made in the wall of the thermal emitter (4) so that its axis intersects the axis of passage (5), and longitudinal grooves (9) made in the side surface of the thermal emitter (4) at the location of the inlet holes of the through passage (8).

Abstract: A gas-filled discharge tube includes a tubular body formed of an electrically insulating material, and has engaging portions respectively at opposite ends thereof. A pair of electrode bases are provided; at least one of the electrode bases is formed of an electrically conducting thin metal sheet, airtightly adhered to the respective open ends. A pair of discharge electrodes are provided; the discharge electrodes have flange portions which are engaged with the respective engaging portions and sandwiched between the tubular body and the respective electrode bases. One of the electrode bases is formed with a gas filling bore by a laser beam for filling an inert gas. The gas filling bore is welded by the laser beam after the inert gas is filled in the tubular body, so as to seal and enclose the inert gas therein.

Abstract: To permit operation of a high-pressure discharge lamp having a metal halide ill at temperatures higher than those acceptable by quartz glass bulbs, the discharge vessel is made of transparent ceramic, thus providing, in operation, better color rendition and higher light output. To eliminate the corrosive effects of attack by the halides on a lead-through connection, the lead-through is made of a solid rod, pin or wire of, preferably, niobium of between 0.5 to 1 mm diameter, passing through a sintered plug (10), in which the niobium lead-through is recessed into the bore from the plug, and the electrode shaft (12) is connected to the lead-through within the recess. The walls of the plugs surrounding the recess thus protect the niobium against corrosive attack, while maintaining the seal throughout its length. Thus, niobium which has a temperature coefficient of expansion close to that of the ceramic can be used.

Abstract: In a center electrode for a spark plug, the center electrode is made of a heat-conductor core cladded with a nickel-alloyed metal. A recess is provided on the front end surface of the nickel-alloyed matrix and the columnar tip is made of a precious metal and fit in the recess in such a manner that a front end of the tip protracts from the recess. The outer surface of the tip is welded to an inner surface of the recess. The dimensional relationship of the components of the spark plug A, B, C, D, E, F and G is as follows: 0.3 mm.ltoreq.A.ltoreq.0.8 mm, 1.2A.ltoreq.B.ltoreq.3A, 0.1 mm.ltoreq.(C-A)/2.ltoreq.0.5 mm, D.ltoreq.(C-A)/2, E.ltoreq.B/4, 0 mm.ltoreq.F.ltoreq.0.5 mm and A/5.ltoreq.G.ltoreq.

Abstract: A cathode ray tube having degaussing coils attached to an outer side of a glass vessel of a funnel part of a main body of the cathode ray tube, in which the degaussing coils each include a flattened part, extended along the outer front surface at a front side of a funnel part, a circular part having a circular cross-section and a transition part interconnecting the end parts of the flattened part and the circular part and changed in cross-section shape from a flattened rectangle to a circle. The degaussing coil may has shape flattened partially to reduce the outer size of the cathode ray tube and includes a plastic case for retaining the coil in the flattened shape. The degaussing coil is stabilized in shape and is not deformed during transport while its attachability with respect to the cathode ray tube may be improved.