Abstract: In plasma display panels requiring interstitial spacer elements within the display area to provide and maintain a uniform discharge gap, the spacers are positioned between lines which constitute the display. The lines adjacent the spacer elements experience a significant decrease in operating margin. This margin decrease is compensated for by either jogging the lines adjacent the spacers outwardly, by widening the lines in the affected areas or a combination of both. Various embodiments for providing this compensation are illustrated and described.

Abstract: In a method of dosing a gas discharge lamp by opening a dosing capsule by the heating action of an electromagnetic field on a metallic support, the support is in the form of a sheet metal clip embracing the capsule and having an opening through which the softened glass of the capsule is forced by the internal pressure. Breakage of the capsule is eliminated and the glass forced through the opening ensures retention of the capsule by the clip. The clip is preferably of ferromagnetic material.

Abstract: A high pressure arc discharge lamp comprises an elongated arc tube disposed substantially axially within a concave shaped outer jacket.

Abstract: An electrode for a miniature high pressure metal vapor lamp comprises a slender tungsten shank joined to a molybdenum inlead by a weld knot. The shank diameter is chosen above the size where melt-back starts at the intended lamp current and is provided wth a fine wire overwind fitting loosely thereon and retained in place by frictional engagement with the weld knot. The overwind reduces breakdown voltage and assures rapid glow-to-arc transition.

Abstract: A spark plug for an internal combustion engine comprising an intermediate electrode in addition to a center electrode and a ground electrode for defining a first air gap between the intermediate electrode and the center electrode and a second air gap between the intermediate electrode and the ground electrode. The first and second air gaps extend in different directions, and spark discharge occurs simultaneously in these air gaps so that the air-fuel mixture flowing toward the spark plug from various directions can be ignited by the sparks jumping across the air gaps.

Abstract: The color picture tube is provided with a terrestrial magnetism correcting member contained in the tube and combined with a shadow mask assembly. The correcting member is shaped as a rectangular box made up of a pair of vertical magnetic side plates extending from the opposed sides of the supporting frame of the shadow mask and a second pair of horizontal magnetic plates interconnecting the upper and lower ends of the vertical side plates.

Abstract: A spark plug having one or more neutral electrodes cooperating with main and ground electrodes to provide a plurality of sparks during each firing cycle of the plug.

Abstract: The glass envelope of a rotating anode x-ray tube has a tubular stem sealed into it. A rotor shaft which supports the x-ray target and induction rotor is coaxial with the tubular stem. The front ball bearing for the shaft has its outer race fixed in the end of the tubular stem and its inner race fixed on the shaft. The rear bearing has its inner race fixed on the shaft and its outer race fixed in a bearing retainer sleeve which is axially yieldable in the tubular stem. A coil spring is interposed between one end of the stem and the bearing retainer sleeve to force the outer race, balls and inner race of the bearings into good electric current exchange contact during rotor operation and to accommodate thermal expansion.

Abstract: In an electron gun for a cathode-ray tube of the type wherein a cathode, control grid electrode, an accelerating electrode and first and second cylindrical electrodes are disposed in the order named and supported and electrically insulated from each other by electrically insulating rods within a neck portion of an envelope, whereby a main electron lens is formed between said first and second cylindrical electrodes, the second cylindrical electrode comprises an enlarged diameter portion and a reduced diameter end portion which is closer to the cathode and is supported by one end of each of the supporting rods; and the first cylindrical electrode has (1) a neck portion which is extended through the reduced diameter end portion of the second cylindrical electrode coaxially thereof and radially inwardly spaced apart therefrom, and (2) an enlarged diameter front portion which has the diameter greater than that of said neck portion, is extended coaxially therefrom into said enlarged diameter portion of said second

Abstract: An apparatus as described for reading an optical radiation-reflecting information carrier, which apparatus comprises an opto-electronic focussing error detection system with two focussing detectors. The path of the read beam which has been reflected by the information carrier and which originates from the read spot includes a single radiation-deflecting element, in such a way that the radiation which is incident on this element is deflected towards the focussing detectors.

Abstract: An electron discharge device including an evacuated envelope having therein an indirectly heated cathode comprised of a metallic cathode cup having a cylindrical wall provided with an outwardly extended pair of opposing axially sloped flanges which contactingly engage respective opposing bevelled surfaces of a dielectric support ring encircling the wall and having an inner periphery radially spaced therefrom.

Abstract: A fluorescent lamp having excellent color rendering property and high luminous efficiency comprises a fluorescent layer coated on an inner surface of a discharge tube.The fluorescent layer mainly comprises a first fluorescent material having-emission peak in a range of wavelength of 480 to 490 nm which is an alkaline earth metal boron phosphate activated by a divalent europium compound having the formulam(Sr.sub.1-x-y-p Ba.sub.x Ca.sub.y Eu.sub.p O).multidot.(1-n)P.sub.2 O.sub.5 .multidot.nB.sub.2 O.sub.3wherein the parameters x, y, p, m and n are in ranges of0.ltoreq.x.ltoreq.0.50.ltoreq.y.ltoreq.0.20.001.ltoreq.p.ltoreq.0.151.75.ltoreq.m.ltoreq.2.30 and0.05.ltoreq.n.ltoreq.0.23and a second fluorescent material having the emission peak in a range of wavelength of 620 to 649 nm and a band width (50%) of 120 to 160 nm.

Abstract: A spark plug for an internal combustion engine comprises (a) an insulator surrounding a central electrode and (b) a housing having a grounded electrode and disposed on the periphery of the insulator. A taper-nose portion of the insulator, which is designed to be exposed to unburnt carbon in combustion gases of a combustion chamber, is modified to facilitate carbon removal from the taper-nose portion and to maintain excellent electrical insulation. The modification comprises a coating of a mixture of vanadium oxide and zirconium oxide in the form of a porous layer or a sponge-like porous layer having an irregularly-shaped structure with pores; it is fixed to the exposed surface of the taper-nose portion to improve the self-cleaning ability of the spark plug without decreasing the degree of electrical insulation provided by the insulator.

Abstract: A cathodoluminescent display device is composed of a plurality of channels. Each of the channels includes spaced guide meshes between which electrons from an electron gun are propagated as beams. At the end of the channels away from the electron gun is a collector and a deflection electrode. The guide meshes are extended between the collector and deflection electrode. Collection apertures in the extended portions pass electrons to the collector. Collection of the electrons by the collector generates a signal which is sensed and used to maintain uniformity of the characteristics of the beams.

Abstract: A pickup tube such as a vidicon has an improved structure for precisely aligning a mesh support electrode relative to a focus electrode. The structure comprises a plurality of focus electrode embossments extending radially outward from the focus electrode and a plurality of mesh support electrode embossments extending radially inward from the mesh support electrode. An insulating ring is molded in situ between the focus electrode embossments and the mesh support electrode embossments. The focus electrode embossments and the mesh support electrode embossments are embedded into the insulating ring.

Abstract: An evacuated envelope is divided into a plurality of electron propagation channels. Each channel includes an electron gun section and a beam guide section. The electron gun section provides electrons in the form of beams to the guide section. The guide section includes spaced guide meshes and the electrons are propagated along the channel in the space between the guide meshes. A launch section, in the form of at least one pair of launch electrodes, is arranged between the electron gun section and the beam guide section. The conditions under which electrons leave the gun section and enter the guide section are selected by the application of selected voltages to the launch electrodes.

Abstract: The present invention relates to a backward wave mode oscillator tube, the delay line of which is in two sections of dissimilar length both operating in the backward wave mode, aligned in the direction of propagation of the electrons of the beam, the second being substantially shorter than the first and exhibiting a structure homothetic with the first in the ratio 1/n, n being an integer, with a load arranged at the end of this second section which is adjacent the electron-gun, in which load is picked-up electromagnetic energy on the n.sup.th harmonic of the predominant component of the wave in the first section.

Abstract: A tungsten-halogen incandescent lamp which includes a vitreous envelope, an inert gas and halogen fill, and two pairs of straight, parallel lead-in wires retained within the envelope's press-sealed end, each of said pairs having a tungsten filament supported thereon within the envelope. The pairs of wires occupy respective parallel planes within the press-sealed end with one pair laterally offset from the other. A method for making the lamp is also disclosed, in addition to a vehicle headlight particularly suited for utilizing the lamp.

Abstract: A lead-tin-bismuth alloy is disposed within a solenoidal electric field lamp to control the mercury vapor pressure. In accordance with one embodiment of the present invention, the alloy is placed within the tip-off region of the lamp envelope. The alloy is fixed within the tip-off region by a means of wetting the alloy to a metal wire structure such as a helix or a cylindrical screen. Alternatively, the alloy may be placed on an interior surface of the envelope by first wetting the glass with a layer of indium. Additionally, methods for wetting the lead-tin-bismuth alloy to the metal wire include firing the alloy in contact with the wire in a hydrogen atmosphere at a sufficiently high temperature to wet the alloy to the wire. The present invention permits the control of mercury vapor pressure in solenoidal electric field discharge lamps.

Abstract: An exposure system is described employing a lamp and means for controlling the exposure time period during which light from the lamp at a preselected level is passed through a light path to an exposure plane. Light is detected in the light path and the brightness of the lamp is adjusted according to the sensed light to provide the preselected level of light output from the lamp during the exposure period. Also described is a method for operating such a system.