Abstract: A moisture trapping film for EL lamps of the organic dispersion type wherein a colorless, transparent adhesive layer having tackiness at room temperature is provided on one side or both sides of a colorless, transparent water-absorbing film.

Abstract: This relates to a thin film, multilayered device with a threshold voltage for electroluminescence less than 100v having good electro-optical characteristics. The layers comprise an amorphous support, on which a binary alloy layer, a luminescent layer, an insulating layer, and a conductor layer are deposited.

Abstract: A sparking plug with a central electrode insulated in respect of the plug screw-thread and with earth electrodes which are electrically connected to the plug screw-thread, there being at the combustion chamber end of the central electrode an attachment part which consists at least partially of platinum or a platinum alloy, the spark gaps being disposed between it and the earth electrodes which extend to it from the side. According to the invention, the attachment part takes the form of a prism, the top surface of which faces the combustion chamber. Furthermore, the earth electrodes extend laterally alongside the side faces of the substantially prismatic attachment member parallel with the edges of top or base surfaces of the prism. This ensures considerable stability and low burn-off. Furthermore, the electrode gap can easily be adjusted.

Abstract: An acceleration/deceleration tube comprises a plurality of pairs of opposing electrodes alternatively positioned to be orthogonal along the opposing direction and overlapped by each other along the direction of the common axis, and a DC power source provided for applying specific DC voltages with a potential difference of a particular direction to each of the pairs of opposing electrodes according to the arrangement order along the common axis.

Abstract: A ring-shaped glass bulb includes a ring-shaped light permeable hollow body having opposite ends each disposed at a prescribed distance from one to the other, and a filament arranged in the hollow body of the bulb. The outer-most edge portion of the outer ring edge of one of the ends of the bulb is disposed at at least the intersecting point between an outer circumferential line extending from the outer-most edge portion of the outer ring edge of the other end of the bulb and a tangent line extending from the inner-most edge portion of the inner ring edge of the other end of the bulb. A desirable prescribed distance between the opposite ends of the bulb is equal to or greater than 30 mm.

Abstract: A high-efficiency cathodoluminescent screen for high-luminance cathode-ray tubes has a design which makes possible a considerable improvement of the luminance. The cathodoluminescent screen of the invention includes a glass substrate (11) carrying a luminescent screen (12) consisting of luminophor grains. According to a characteristic of the invention, an intermediate screen (15) is inserted between luminescent screen (12) and substrate (11), with the intermediate screen (15) having a refraction index n1 which is clearly greater than refraction index n0 of substrate (11). As a result of this arrangement, a considerable part of the light which penetrates intermediate layer (15) is reflected in the direction of luminescent layer (12), so that this light can then be rediffused to substrate (11), i.e., to use, with an emission indicatrix which is much more greatly concentrated on the axis than in the prior art.

Abstract: In a spark plug for use in an internal combustion engine, a nickel-alloy based center electrode is placed into a metallic shell through a tubular insulator. An outer electrode is depended from the metallic shell to from a spark gap with a front end of the center electrode. A spark portion is secured to the center electrode, and comprising a nickel-alloy based tubular clad tip and an iridium or iridium-alloy based inner core fit into the clad tip. A rear open end of the clad tip is welded to a front end surface of the center electrode. A dimensional relationship among the center electrode, the inner core and the clad tip being determined as follows: A.ltoreq.1.5mm, 0.2mm.ltoreq.B.ltoreq.0.8mm, C.gtoreq.0.1mm, where A is an outer diameter of the front end surface of the center electrode, B is an outer diameter of the inner core, while C is an outer diameter of the tubular clad tip.

Abstract: The reflector lamp has a lamp vessel (1) whose second portion (7) and third portion (10) are mirror-coated. A light source (17) is positioned axially on either side of the greatest diameter (3). The lamp gives a light beam with a high luminous flux and a high luminous intensity in the beam center.

Abstract: In the electron beam generator cooling is provided by the electrical conductors of the incandescent cathode and control electrode which are configured as heat bridges and connected to cooling plates in the interior of the high-voltage insulator which in turn are connected in a heat-conducting manner to a pot-shaped cooling body. The cooling body, configured as part of a capsule for accommodating circuitry for the control of the electron beam generator, is surrounded by a heat exchanger which is connected to a cooling circuit and is at ground potential, and is insulated from the cooling body by a wall of the high-voltage insulator.

Abstract: A gas discharge lamp having an accurate centering of electrodes. The gas discharge lamp has a gas-filled glass tube whereby the electrodes are inserted at end faces of the glass tube. Each electrode is melted into respectively a hollow-cylinder-type glass member residing inside an end of the glass tube. The outside end face of each glass member lies approximately flush with the corresponding end face of the glass tube and is coated, together with the end face of the glass tube, with a layer of glass solder.

Abstract: Display tube including an envelope portion 2 coated with a first electrically conducting layer 7 and a display window 1 coated with a second electrically conducting layer 8 has a connection means having two tongue-shaped members 11 and 12 and fastened to a high-voltage contact 13. The tongue-shaped members 11 and 12 extend on both sides of the high-voltage contact 13 and bear against the electrically conducting layers 7 and 8, respectively.

Abstract: A compact fluorescent lamp unit comprises a double U-shaped discharge tube having a base shell secured to one end thereof. A housing containing the necessary starting and operating circuitry includes a first portion having a standardized base and a second portion surrounding the base shell of the discharge tube. The internal surface of the second housing portion includes a plurality of flexible fingers for securing the base shell to the second portion of the housing. in a preferred embodiment, each flexible finger includes a latch for engaging the base shell. Preferably, the the internal surface of second housing portion further inlcudes a plurality of support ribs for preventing or limiting lateral movement of the base shell within the housing.

Abstract: A thin-film EL display having a high-contrast ratio comprising a transparent ceramic substrate. A background electrode is formed on the lower surface of the ceramic substrate. A photochromism layer is formed on the upper surface of the ceramic substrate. The photochromism layer is black-colored when exposed to a required wavelength of light of 3,500 .ANG. to 5,100 .ANG.. Therefore, it is possible to avoid decrease in the contrast of the display device which may be caused by external light or light emitted from the fluorescent layer itself.

Abstract: The reflector lamp with lamp vessel (1), whose second portion (8) and third portion (11) are mirror-coated and form cooperating reflector portions, has an axially positioned light source (15) which extends in front of and behind the greatest diameter (3). The lamp forms a beam with a high luminous flux and a high luminous intensity in the beam center.

Abstract: To prevent the formation of melt-back slugs or granules on electrodes of h pressure, high power discharge lamps, when the lamps are operated under alternating current conditions of between about 20 to 60 A, for example, the electrodes are terminated in regions of decreasing diameter and, in accordance with the invention, comprise tungsten doped with lanthanum oxide (La.sub.2 O.sub.3) between about 0.5 to 2%, by weight, preferably about 1%. The doping intensity may increase towards the inside region of the electrode.

Abstract: An electric incandescent lamp includes a lamp vessel having an axis and a reflective coating. Within the lamp vessel two filaments are arranged in a disc-shaped space transverse to the axis and which are electrically connected in series, the second end portion of the first filament being electrically connected to the first end portion of the second filament. Mains voltage is applied between the first end portion of the first filament and the second end portion of the second filament. The filaments are arranged opposite each other so as to substantially surround the axis of the lamp vessel, and are closest to each other at the corresponding end portions thereof. Such end portions are separated by a gap in either or both the axial and transverse directions. The lamp produces a symmetrical light beam of high intensity at its center.

Abstract: In a fluorescent lamp, an elongated envelope containing, e.g., an Argon gas is sealed by covering each end with a stem. Through this stem, a pair of leading-in wires are introduced into the interior of the envelope, such that those portions of the leading-in wires which are located inside the envelope constitute internal wire portions. A filament coil, which has an emitter coated thereon in a predetermined range, is supported between the internal wire portions. An auxiliary anode, which is connected at one end to each internal wire portion, extends inside the envelope in the discharge direction of the fluorescent lamp. The auxiliary anode is bent such that its distal end is located within the emitter-coated range, as viewed in the longitudinal direction of the filament coil, and is located close to the central axis of the discharge space, as viewed in the radial direction of the filament coil.

Abstract: An optical light source device includes a source member providing the emission of electromagnetic radiation wavelengths in the optical region of the spectrum, and at least one cavity waveguide member coupled with the electromagnetic radiation source member having a predetermined lateral dimension. The cavity waveguide member and predetermined dimension restrict the emission of electromagnetic radiation in the long wavelength non-visible infra-red range. In a preferred embodiment, the optical light source is formed with an array of optical light source members and associated cavity waveguide members.

Abstract: The electric lamp has a quartz glass lamp vessel (1) with molybdenum current supply conductors (3) extending to an electric element (2) arranged in the lamp vesel (1). The current supply conductors (3) have a continuous coating (4) of quartz glass which is fused to the lamp vessel (1). The coating (4) forms with the current supply conductor (3) a glass/metal interface (5). The glass of the coating (4) adjoining the interface (5) contains thorium, hafnium, chromium, aluminum, titanium, tantalum, magnesium, calcium, strontium, barium, zirconium, lanthanum, scandium, a lanthanide, niobium, boron or yttrium. The coating (4) has a very strong adhesion to the metal; the lamp vessel (1) has a great strength.

Abstract: A metal halide arc discharge lamp includes an arc tube and a light-transmissive shroud mounted within a lamp envelope. The arc tube and the shroud are mechanically supported within the lamp envelope by resilient spring members. Since the support structure for the arc tube and the shroud is mechanically and electrically isolated from the lamp stem, leakage current between the support structure and the electrical inleads is eliminated, thereby reducing sodium loss from the arc tube and extending the operating life of the lamp. The spring-mounted construction enables the lamp to withstand mechanical shock and vibration.