Abstract: In a UV high-power radiator, the electrodes (6', 6") consist of wires embedded in a glass dielectric (3). The dielectric is arranged spaced between two UV-transparent sheets (1, 2). The discharge spaces (8, 9) are filled with a filler gas emitting radiation under discharge conditions. The surface discharges (10) form on the dielectric surface in each case between two adjacent electrode wires (6', 6"). A high-power radiator constructed in this manner is characterized by simple and economical construction and high UV yield.

Abstract: A gas discharge switch that has at least two coaxial electrodes which are provided with coaxial holes and form in a central discharge region, a gas discharge path, and an insulating region at their edges. The spacing D in an axial direction of the electrodes is larger than the spacing d.sub.1 of the electrodes at the inner edge of a washer-like insulator in the insulating region. The electrodes are respectively connected to one of the flat sides of the insulator, and the spacing d.sub.1 is at least as large as the spacing d.sub.2 of the electrodes in a shielding region that is formed between the insulating region and the discharge region. A shield that shields the insulator from the discharge region is provided.

Abstract: A thyratron includes a grid structure in which a grid element has a plurality of apertures therethrough, each of the apertures comprising two arcuate portions at different distances from the center of the grid which are connected by a radial portion. Thus a large grid area may be provided without detrimentally affecting voltage hold-off, jitter or mechanical soundness.

Abstract: An end-viewed low-pressure gas discharge lamp and an envelope for said lamp having a capillary tube discharge bore for containing an excitable gas in which the capillary tube is in direct contact with a cooling medium. A window of optical quality fused silica, a thin section of bubble and particle free glass blown quality silica or sapphire is disposed on an end of the capillary tube for emitting light from a discharge of the excitable gas. A pair of electrodes are hermetically sealed through the envelope for producing a discharge in the capillary tube between the electrodes. The envelope may include a return path parallel to the capillary tube or a side tube as a means for connecting the two ends of the capillary tubes with the electrodes without obstructing the end view of the discharge. Filling the envelope with an excitable mixture of one or more gases, such as vaporized mercury, to a less than atmospheric pressure, and connecting the electrodes to a power supply completes the lamp.

Abstract: A discharge lamp comprises a cylindrical glass bulb with an open bottom and a closed top of dome-shape or flat-shape, a base for holding an anode and a cathode with at least one separation plate for dividing an inner space of the bulb into plural spaces forming a folded discharge path, and the base is directly and airtightly bonded to the bottom opening of the bulb by heat softening of the bulb, and the anode and cathode are also airtightly fixed on the base by selectively melting down of a first adhesive and a second adhesive which each have different melting points.

Abstract: An electrodeless discharge lamp device has an envelope in which a gas that discharges to emit light upon application of a high frequency voltage is sealed, the envelope including two straight pipe parts forming a circulating discharge path, so that a high frequency electric current is caused to flow throughout the discharging gas in the entire envelope and a uniform discharge light emission can be attained.

Abstract: A fluorescent lamp assembly for operation from a source of AC line voltage. The assembly includes a fluorescent lamp having an arc length not greater than about 120 mm and an envelope which includes at least one constricting portion located therein for constricting the plasma discharge to provide an increase in the lamp voltage. Also included is a lead-type ballasting means which comprises a capacitor in one embodiment connected in series with the lamp.

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: Low-pressure mercury vapor discharge lamp having a tubular discharge vessel arranged within a lamp envelope. The discharge vessel consists of two, preferably generally helically bent tube parts which are connected together by a coupling joint which intersects the tube parts at a location spaced from their sealed ends remote from the electrodes. A cool area is formed in the discharge vessel near this coupling joint to control vapor pressure.

Abstract: An overvoltage arrester for handling high surge currents including a pair of electrodes one of which includes a blind bore into which the second electrode projects, thereby providing at least one discharge gap between the two electrodes. The arrester of the present invention has a long useful life and a high surge current carrying capability.

Abstract: A thyratron utilizable as a circuit interrupting protective device is provided. The thyratron includes an apertured grid between anode and cathode which is divided transversely into two parts separated by an insulating layer. Both surfaces of the composite grid remote from the insulating layer carry conductive meshes which meshes cover the exits of the apertures in the composite grid. The thickness of the insulating layer and the dimensions of the meshes are such that no point within an aperture is further from a part of the grid or a mesh than the Debye distance whereby the effects of Debye shielding tend to be reduced when a negative potential is applied between two said parts of said grid to quench a discharge previously initiated by applying positive potential to both parts of the grid.

Abstract: A low-pressure mercury vapor discharge lamp comprising an envelope forming a gas-tight closed space and a pair of inner tubes provided in the closed space and having an end thereof sealed at the first end of the outer envelope, the other end thereof being opened into the closed space, and electrodes provided at the sealed end sides in the inner tubes. The temperature of the coldest spot of the envelope is in a range between 45.degree. C. and 65.degree. C. at an ambient temperature of 25.degree. C.

Abstract: A fluorescent light source and power supply adapted therefore in which a set of three D.C. mercury discharge paths are provided adjacent each other in a single tubular envelope. A cathode is provided at the base end of each path and a single anode at the other end. The three discharge paths are isolated longitudially extended semi-circular glass insulator partitions. The power supply provides D.C. voltage across the anode and cathodes and a switching circuit which transfers energy from a transformer during portions of the switching cycle to efficiently power the tube.

Abstract: The ballast temperature in the base up position of a miniature arc discharge lamp is reduced, increasing its lifetime, by placing a thin transparent thermal convection/radiation baffle between the arc tube and lamp filament, which are the heat source, and the interface of the envelope with the ballast housing. Greater temperature reduction is realized by putting insulation inside the housing cover and reducing the diameter of wires supporting the arc tube and filament, the latter a ballast resistor.

Abstract: To cool the diaphragm of a spectral discharge lamp having an anode and a cathode between which a discharge is established, which discharge is controlled by the diaphragm, a fluid supply and removal duct is connected to a cooling circuit in or on the diaphragm structure to supply, for example, water to cool the diaphragm. The tube or bulb of the lamp may be in form of a jacketed enclosure through which cooling water is conducted, preferably in the same supply and removal circuit as that for the diaphragm structure.

Abstract: Bargraph displays wherein the illuminable bar segments are formed by winding filamentary conductors upon a mandrel.

Abstract: A shield is disposed about the electrode of a metal halide arc discharge lamp in order to improve lamp performance. The construction and location of the shield are such as to not lower the cold-spot temperature of the arc tube.

Abstract: An improved gas discharge lamp having (i) a cylindrical quartz envelope with (i) 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 sheathing 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.