Abstract: A high pressure metal halide discharge lamp of the sodium-scandium type which has the maintenance thereof improved by the addition of a small quantity of lead metal powder. The lead metal powder is added to the discharge sustaining fill in an amount of from between about 0.4 and 1.2 wt. % of the total amount of discharge sustaining fill.

Abstract: An image intensifier tube comprising an evacuated envelope wherein two spaced electrodes are insulatingly secured to one another by a dielectric member having an end portion extended within closely spaced walls of a hollow conductive shielding means attached to one of the electrodes for protecting the end portion from conductive vaporous material released within the envelope during processing and from resulting voltage breakdown during operation of the tube.

Abstract: The invention provides an improvement in the electrical connective means for effecting interconnection between the mask electrode and panel components in a color cathode ray tube. A protruding element on the resilient contactor mates with an aperture in the mask frame to provide a contactor retention and release mechanism which is beneficially utilized during screen fabrication.

Abstract: Improved fluorescent lamps utilize phosphors which comprise a major amount of a particulate phosphor such as a cool white alkaline earth halophosphate coated with a minor amount of a protective coating consisting of NaCs.sub.2 PrCl.sub.6.

Abstract: The haze around the electron beam spot in the corners and at the edge of the display screen is reduced by using in the electron gun a first grid of a construction such that a multipole lens which is mainly a first quadrupole lens is formed in cooperation with the cathode. The first grid in cooperation with the second grid also forms a multipole lens which is also a mainly second quadrupole lens and which is rotated 90.degree. with respect to the first quadrupole lens. Such a system of lenses in the first grid can be formed, for example, by providing in the first grid an aperture with elongated openings both on the side of the cathode and on the side of the second grid. The longitudinal axis of the elongated opening on the side of the cathode is substantially at right angles to the longitudinal axis of the elongated opening on the side of the second grid.

Abstract: A composite article is disclosed which embodies a thermally sensitive component enclosed within borosilicate glass bodies having a coefficient of thermal expansion in the range of 30 to 40.times.10.sup.-7 /.degree. C. The bodies are joined by an intermediate layer of sealing material which is a fused mixture of a sealing glass containing an infra-red absorbing oxide and a mill additive having a low coefficient of thermal expansion. There is further disclosed a method of forming the seal between the glass bodies by application of infra-red radiation to the sealing material.

Abstract: Low-pressure discharge lamp having a discharge space, limited by an elongate lamp vessel, electrodes at one end of the vessel in the discharge space between which electrodes a discharge takes place during operation of the lamp. The lamp vessel has partitions to divide the discharge space into each extending substantially in the length of the discharge vessel which chambers communicate with one another via at least one opening. The chambers are sequentially passed through by the discharge, the opening between at least two chambers being at least partly wedge-shaped, the minimum width being located nearest to an electrode whose discharge path extends itself after ignition.

Abstract: Two current supply conductors connected to an emissive filament located within a vacuum enclosure are each constituted by a leak-tight tube formed of material other than a heavy metal which traverses the enclosure wall through a leak-tight bushing, and by a conductor of electrically conductive heavy metal such as copper which is placed inside the leak-tight tube and completely isolated from the vacuum enclosure. This arrangement permits the continued use of heavy metals such as copper for current supply to ion sources without any attendant danger of heavy metal ion formation in the emitted beam.

Abstract: An evacuated envelope includes substantially parallel front and back walls with a cathodoluminescent screen on the front wall. Within the envelope, in spaced relation to the back wall and substantially parallel to the screen, it is an electron beam guide comprising a pair of spaced apart, elongated guide grids having a plurality of apertures therethrough. At one end of the beam guide is an electron beam generating and directing means which directs at least one beam of electrons between the guide grids. A shielding member is disposed between the screen and the beam guide adjacent to the electron beam generating means.

Abstract: A spark plug including an air supplying system which supplies enough air to an internal-combustion engine to promote the required degree of combustion of the fuel in the engine and produces little carbon which might block the ventilation of air. The air supply system includes a removable filtering device for eliminating dust.

Abstract: A target for vidicons and image intensifier tubes include a potential barrier less than about 1500 A from an input signal sensing surface. The targets also include various passivation means for stabilizing the energy level configuration along the input signal sensing surface by substantially fixing the valence or conduction band along that surface relative to the Fermi level.

Abstract: A compact, maintainable 80-keV arc chamber, extractor module for a neutral beam system immersed in a vacuum of <10.sup.-2 Torr, incorporating a nested 60-keV gradient shield located midway between the high voltage ion source and surrounding grounded frame. The shield reduces breakdown or arcing path length without increasing the voltage gradient, tends to keep electric fields normal to conducting surfaces rather than skewed and reduces the peak electric field around irregularities on the 80-keV electrodes. The arc chamber or ion source is mounted separately from the extractor or ion accelerator to reduce misalignment of the accelerator and to permit separate maintenance to be performed on these systems. The separate mounting of the ion source provides for maintaining same without removing the ion accelerator.

Abstract: In a cathode-ray tube wherein the electrical connection between a conductive metal body attached to and having a surface contiguous with a surface of the envelope and a conductive layer on that surface is assured by a conductive stripe contacting the body and the layer, the stripe consists essentially of a minor proportion of glass and a major proportion of at least one metal selected from the group consisting of tin, lead and indium.

Abstract: In a color television display tube having an internal resistive layer the getter is connected to the high voltage contact by means of a metal connection strip. In order to reduce the radio interference radiation level of the tube the connection strip has a metal contact spring which contacts the internal magnetic screening cone of the tube.

Abstract: A high-pressure sodium vapor discharge lamp of improved color including in combination a specified arc length to power input, a predetermined sodium to mercury amalgam ratio, heat shields surrounding each end of the arc tube and an improved end cap to arc tube seal, which combine to increase the sodium vapor pressure and provide a lamp of greatly improved color.

Abstract: Mercury metal-halide HID lamp has as a discharge-sustaining filling mercury, neodymium iodide and cesium iodide, with the gram mol ratio of neodymium iodide to cesium iodide being about 1:1. Sodium iodide may also be included as a discharge-sustaining material to supplement the foregoing materials. The lamp has a protective outer envelope which carries on the inner surface thereof finely divided phosphor which specifically is calcium sulfide activated by europium and sensitized by one of lead or tin, in order to lower the color temperature of the lamp and improve the color rendering properties thereof.

Abstract: A beam of bunches of charged particles is controlled by generating a signal in response to the passage of a bunch and adding to that signal a phase-flipped reference signal. The sum is amplified, detected, and applied to a synchronous detector to obtain a comparison of the phase of the reference signal with the phase of the signal responsive to the bunch. The comparison provides an error signal to control bunching.

Abstract: This disclosure depicts a high-voltage cathodoluminescent gas discharge image display panel having an ordered array of display elements. The panel includes envelope means containing an ionizable gas at a predetermined very low pressure. The envelope means includes a transparent faceplate on the inner surface of which are disposed cathodoluminescent target elements. Electron source means produces at a given time at least one high-density electron beam, and includes means to cause a plasma sac to generate and gather electrons, and accelerate them to form a concentrated electron beam. An ultor electrode receiving a predetermined relatively high ultor voltage establishes a high voltage gradient in a plasma-free acceleration section which is effective to straight-line accelerate said electron beam in a substantially collision-free path directly into high-energy bombardment of the cathodoluminescent target elements.

Abstract: The invention provides discrete means for temporarily covering a substantially annular U-shaped effusive material container for use in a cathode ray tube. The annular covering member is likewise substantially U-shaped and, being of smaller dimensioning, is telescopically fitted within the container to cover the effusive material disposed therein. The inner and outer walls of the channeled cover are contiguous with the respective walls of the container to form the two concentric laminated composite walls of the assembly. The laminated components comprising each wall are joined in an interlocking manner by a substantially continuous annular deformation of the respective composite wall structure thereby effecting positive securement of the cover to the container.

Abstract: A gas discharge indicator device including a discharge chamber provided with an anode and a cathode between which is produced a gas discharge producing UV radiation, the discharge chamber being provided with at least one coating of light emitting material which emits visible light in response to the emitted UV radiation, and a light transmitting panel which delimits the discharge chamber at least on one side, and through which the visible light is observable, is provided with material disposed on at least part of the surfaces delimiting the discharge chamber for reflecting UV radiation in order to increase the proportion of emitted UV radiation conducted onto the layer of light emitting material.