Abstract: A corner stud for a color CRT face panel comprises a hollow body having two juxtaposed frusto-conical portions, one closed and one opened. The opened end is sealed into the corner formed by two adjacent walls of the face panel.

Abstract: An excitation coil, for stimulating a high-intensity-discharge plasma in an electrodeless discharge lamp, has at least one turn of a conductor arranged generally upon the surface of a toroid with a rhomboid or V-shaped cross-section, which is substantially symmetrical about a plane passing through the maxima of the toroid. The major radius of the coil is such that the lamp is insertable into the coil so that the coil induces a co-planar toroid plasma discharge arc in the lamp, when the coil is connected to a radio frequency (RF) power source.

Abstract: An improved gas discharge lamp having (i) a cylindrical quartz envelope with (ii) a flat circular disk magnesium fluoride window substantially transparent to short wavelength light at one end of the cylindrical envelope, (iii) two tungsten or molybdenum electrodes each of which is sheathed in a capillary tube, and (iv) a partition within the envelope and between the tube-sheathed electrodes which partition defines, in combination with the envelopes, a bore about each of the electrodes and its sheating tube. A gas discharge path between the electrodes produces bright light spots at the capillary tube orifices, at a region of the lamp proximate the window. The windowed quartz envelope is inexpensive to manufacture. The partition imparts strength and maintains the capillary tubes in precise alignment during manufacture. The tungsten or molybdenum electrodes support high currents providing high illumination.

Abstract: A shadow mask (13) in accordance with the present invention comprises: an iron plate (14) having many apertures (15) for electron beams, wherein each of the apertures comprises a relatively medium diameter portion (15c), a relatively smaller diameter portion (15b), a relatively larger diameter portion (15a) in order from one side of the plate in which said one side is to be irradiated by the electron beam; a first surface-treated layer of Fe.sub.3 O.sub.4 which covers the allover surface of the plate; and a second layer (5) for preventing thermal strain of the plate caused by heat due to energy of the electron beams, wherein said second layer is applied over said first layer only on said one side of the plate.

Abstract: A spark plug having a heat pipe incorporated in the center conductor assembly in the insulator centerbore. The heat pipe is thermally non-conducting below a design temperature such that the firing end of the spark plug retains heat to burn off fouling deposits. Above the design temperature range, a vaporizable medium in the heat pipe vaporizes such that its change of state extracts heat from the firing end, the vapor moving to the cooler part of the heat pipe and condensing to release its heat by a change of state. Capillary means running the length of the heat pipe returns the vaporizable medium to the firing end of the heat pipe. This circulation of the heat pipe medium which occurs when the firing end exceeds the design temperature transfers heat from the firing end to prevent its overheating. The heat pipe in the insulator thus controls automatically the operative heat range of the spark plug.

Abstract: In a CRT for constituting a display apparatus in which the fluorescent screen is composed of a large number of CRTs arranged in the matrix form, a plurality of holes for passing an electron beam are provided in an electrode for controlling the electron beam which is so placed as to confront the cathode for emitting the electron beam, for the purpose of attaining improved modulation characteristics and a simplified drive circuit requiring lower power consumption. A plurality of fluorescent screens having individual luminous colors are formed on respective portions obtained by dividing the inside of the panel of said CRT and individual electron beams are respectively applied to those fluorescent screens, resulting in a picture of good quality because of increased picture elements.

Abstract: For accelerating charged particles, an acceleration path in the form of a race track is provided with straight track sections and curved track sections with which dipole magnets with curved flat coils are associated and which are provided radially outward with at least one exit opening for synchrotron radiation. According to the invention, an absorber (20) is arranged in the chambers (16) of the curved track sections (3, 4) and a support structure (60) is provided between the dipole magnets (22, 23) behind the absorber (20) in the direction of the synchrotron radiation (18). The absorber (20) can advantageously be provided with additional cooling. The support structure serves as a spacer for the superconducting dipole magnets (22, 23) of the curved track sections (3, 4). The support structure for the flat coils is thereby simplified accordingly.

Abstract: A discharge lamp device includes a tube, and a cathode disposed in said tube and made of a valence-compensated semiconductor ceramic material, or a forcibly reduced semiconductor ceramic material, or a valence-compensated and forcibly reduced semiconductor ceramic material. Since the cathode does not include an electron-emitting material, but uses a semiconductor ceramic material, no vapor is produced by the cathode and also the cathode does not react with mercury vapor filled in the tube. Therefore, the discharge lamp device has improved characteristics such as greater heat resistance, better chemical resistance, and improved discharge characteristics. The discharge lamp device is less costly because the semiconductor ceramic material used as the cathode is inexpensive.

Abstract: In an electron beam accelerator of the type that electrons are guided into an equilibrium orbit through an inflector and radiant light is generated by accelerating the electrons on the equilibrium orbit, there is provided a drive section for moving the inflector in the directions perpendicular to the plane defined by the equilibrium orbit, and by making use of this drive section the inflector is made to retire from the radiant light. By making the inflector retire, radiant light can be derived also through the position of the inflector, and also, since the inflector is not irradiated by the radiant light, attention of the radiant light caused by lowering of a degree of vacuum can be prevented.

Abstract: The low-pressure sodium discharge lamp according to the invention has a U-shaped discharge tube (1) with seals (4, 5), through which current-supply conductors (6, 7) extend to electrodes (8, 9). A supporting member (14) fixes the discharge tube (1) in an outer bulb (10). Upright collars (18, 19) at the supporting member (14), which surround the seals (4, 5) throughout their lengths, prevent the discharge tube from becoming leaky at high-frequency operation and the lamp from reaching the end of its life prematurely.

Abstract: An acceleration and scan expansion lens system for use in an electron discharge tube provides scan expanion in which the amount of scan expansion provided in the horizontal direction is independent of the amount of scan expansion provided in the vertical direction. In a preferred embodiment, the lens system (10) is employed in a cathode-ray tube (12) which has greater deflection sensitivity in the vertical direction than in the horizontal direction. The lens system includes a mesh electrode structure (62) that has a dome-shaped mesh element (66) which is supported by an electrically connected to a metallic cylindrical support element (70). The dome-shaped mesh element is formed to have a concave surface as viewed in the propagation direction (35) of the electron beam and is of rotationally symmetric shape. The lens system also includes an annular electrode element (64) that has an aperture of elliptical shape and is positioned adjacent the output end of the mesh electrode structure.

Abstract: An arc tube (13) for a high pressure sodium discharge lamp (10) contains a quantity of a getter materal which comprises an alloy of titanium and niobium metal. The alloy is in the form of a coiled wire (31) which is wound on a tungsten electrode shank (29). The wire may have a sheath of niobium metal.

Abstract: A shadow-mask color picture tube has a glass panel and glass funnel joined together via outwardly extending flange portions thereof. To mount a shadow mask in the picutre tube, holding plates are fastened between the flanges, preferably in internal recesses of the flanges, and each of the holding plates has a hole for a rivet which holds the mask and, in a preferred embodiment, an internal shield. The mask is preferably connected with the holding plates via bimetal elements.

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 deflecting electromagnet having bow-shaped pole pieces 7b,7a disposed at input and output side end surfaces 6b,6a, respectively, of a main pole piece 6 which deflects and focuses an ion beam 2 generated by an ion source 1. The respective bow-shaped pole pieces are rotatably contacted with the side end surfaces of the main pole piece. Wedge-shaped pole pieces 8b,8a, are disposed in freely slidable contact with the planar surfaces of each of the bow-shaped pole pieces, respectively. The deflecting electromagnet constructed as above can be used to easily establish and adjust the effective borders of the magnetic field to a desirable position to establish and adjust, as desired, and the angle of the faces of the deflecting electromagnet at which the ion beam is inputted and outputted.

Abstract: A fluorescent lamp including a glass envelope having first and second end caps at the opposite ends thereof and each end cap provided with a connecting pin, the glass envelope containing energization means for generating light emanating from the lamp and upon energization thereof a first portion of the glass envelope adjacent the first end cap and a second portion of the glass envelope adjacent the second end cap being heated to a first temperature and an intermediate glass portion intermediate the first and second glass portions being heated to a second temperature lower than the first temperature, and a composite safety coating including first and second substantially light transparent coatings and an intermediate substantially light transparent coating intermediate the first and second coatings, the first coating surrounding and secured to the first glass portion and including an outer end portion surrounding and secured to a portion of the first end cap not including the first connecting pin and including

Abstract: A plurality of mountings for locating a shadow mask carrying frame in a color cathode ray tube each comprise one mounting element bonded to the tube wall and another mounting element connected to the frame, which together provide a spring-loaded spigot-and-socket connection. One feature is that the element has a portion bonded to the wall of a compatible material and a second portion of a hard material for low-wear. Another feature is that the element which provides the spigot has a recess therearound within the thickness of the wall into which the other element extends in order to save space.

Abstract: A short-arc discharge lamp includes a combination of electrodes arranged in an opposing relation in a discharge space surrounded by silica glass. An expansion and contraction member made of a shape-memory alloy, which contracts at high temperatures, is fixed on one of the electrodes. A lighting start-up discharge terminal is formed at a free end of the expansion and contraction member. A free end of the lighting start-up discharge terminal is in contact with the other electrode at room temperature but is separated from the other electrode at high temperatures.

Abstract: Thermal radiation reflectivity between the upright edge of the faceplate and at least the edge portion of the shadow mask is adjusted to obtain a desired temperature stabilisation level which avoids electron beam spot misalignment, such as by having selected areas of the upright edge non-aluminized while the remainder of the upright edge together with the back of the screen have a layer of aluminium thereon. The size, shape and disposition of the selected areas are chosen to obtain an optimum ratio of aluminized and non-aluminized glass surface which will provide a desired radiation coefficient. Typically at least 35% of the upright edge remains aluminized. In addition, a material having a high radiation coefficient, such as a low melting point glass with a high lead content, may be selectively applied to a peripheral portion of the shadow mask and the adjoining mounting frame.

Abstract: Display tube such as a projection television display tube or a DGD tube (DGD=Data Graphic Display), including an electron gun (5) in an evacuated envelope (1) for generating an electron beam (6) which is focussed to a spot (8) on a display screen (7) with the aid of an electrostatic focussing lens (27, 30) and which is deflected across the display screen (7) in two mutually perpendicular directions (x, y). If a correction structure (37) consisting of magnetic half-hard material is provided in such a tube in the proximity of the focussing lens (27, 30) and coaxially of the gun axis (20) in which at least one magnetic 2N pole (N.gtoreq.2) is induced for correcting spot shape errors, a high spot quality can be realized with low-cost deep-drawn lens electrodes (27, 30).