Abstract: A process for sealing of niobium-ceramic through-wall assemblies for ceramic or metal vessels for high temperature and high pressure or vacuum applications, for example an electrical feedthrough and sealable fill opening in an alumina arc tube for a high intensity discharge (HID) lamp. The process produces a fritless hermetic seal while maintaining the ductility of the niobium components. The niobium-ceramic through-wall assembly includes an axially bored alumina or yttria sealing means having a ductile niobium throughpiece close fitted to and extending through the bore. The throughpiece is preferably essentially pure niobium, but may contain up to about 2% zirconium. The assembly is fired at about 1400.degree.-2000.degree. C. in a pure oxygen- and hydrogen-free (<5 ppm each) inert, preferably flowing, atmosphere or vacuum for a time sufficient to form a hermetic seal between the throughpiece and the sealing means. The fired assembly is then cooled to below 250.degree. C.

Abstract: The present invention relates to an improved arc tube assembly for a high intensity metal halide lamp. The invention provides improved sealing structure for the electrode assembly using a foil to glass seal.

Abstract: A method of manufacturing an air-tight ceramic container is disclosed. This method includes the steps of coating an active metal consisting of Ti and/or Zr on an opening end face of a ceramic tubular member in an amount of 0.1 to 10 mg/cm.sup.2, thereby forming an active metal layer, placing a brazing filler metal on the active metal layer, placing a metal cover member for shielding an opening portion of the ceramic tubular member so that a peripheral portion end face of the metal cover member is in contact with the brazing filler metal, and melting the brazing filler metal by heating, thereby brazing the metal cover member to the opening end face of the ceramic tubular member.

Abstract: A process for producing a fluidtight seal between a body of a vitroceramic material and a metal element intended to be part of the construction of a gas laser and in particular a laser gyrometer includes interposing between the surfaces of the body of vitroceramic material and the metal element to be sealed a joining member of a metal capable of diffusing into the vitroceramic material, and subjecting the assembly thus formed to a thermo-compression operation so as to result in a superficial diffusion of the material of the joining member into the facing surfaces of the body of vitroceramic material and the metal element.

Abstract: Cylindrical tubes of translucent alumina ceramic, which have metallic current bushings at the ends, are sealed vacuum-tight. For this purpose, a metallizing paste which contains(a) at least one finely dispersed metal powder composed of tungsten, molybdenum, niobium or tantalum,(b) a liquid organic binder and(c) a pulverulent calcium-magnesium silicate having a melting point in the range of 1200.degree.-1500.degree. C.,is applied to the ends of the tube, the paste is burned in on the alumina ceramic and a thin metal layer is thus produced, a further layer of nickel or copper is deposited chemically or by electroplating on the metal layer remaining after the burning-in, metallic current bushings are inserted into the tube in the region of the tube ends, and the ends are sealed in the metallized areas by means of a brazing solder having a melting point between 950.degree. and 1200.degree. C., for example a Cu/Ag alloy, if necessary with the use of disk-shaped gasket elements.

Abstract: Disclosed is a holder for sealing member, in which at least a portion of the holder which comes into contact with the member comprises a sintered body comprising as a main component a non-oxide ceramic of silicon nitride, aluminum nitride, sialon or silicon carbide.By the use of the holder according to this invention, in the hermetic sealing process which is carried out continuously and automatically, an exchange frequency of the holder can be decreased remarkably, and thus a working efficiency on a manufacturing line can be increased. In consequence, the holder according to this invention is industrially very useful, and in particular, it is suitable for the hermetic sealing of the panel pins for cathode ray tubes.

Abstract: A ceramic arc tube assembly for an arc discharge lamp includes an arc tube having openings for electrode feedthroughs at opposite ends. The feedthroughs each comprise a niobium tube having a tungsten electrode welded to it. A connection wire is welded to the feedthrough at or near the end of the niobium tube, and the feedthrough is subsequently sealed into the arc tube with the connection wire abutting the arc tube. Since the connection wire is prewelded to the feedthrough, the feedthrough can be made as short as practicable without risk of damaging the seal during welding. As a result, feedthrough material cost is substantially reduced. Preferably, the connection wire is used for locating the feedthrough in the arc tube during seal formation.

Abstract: A method for the manufacture of vacuum tube bases wherein to mould bases of electronic tubes shaving conductors of different lengths, a widened opening is made in the upper mould and a distance sleeve with a dead hole is placed in it. This distance sleeve compensates for the difference in length with respect to the longest conductors. Also set forth is a device for application of this method.

Abstract: The disclosed charge transfer signal processor includes a vacuum housing having an input face and a output face, a 2-D electromagnetic input means cooperative with said input face for providing a 2-D input electronic charge signal within the vacuum housing, transfer means for imaging the 2-D input electronic charge signal in a region of the vacuum housing proximate the vacuum housing output face, and charge feedthrough means coupled to the vacuum housing output face for transferring the imaged 2-D electronic charge signal externally to the vacuum housing. In one embodiment, the charge transfer signal processor is operable as a Gen-I charge transfer amplifier. In another embodiment, a microchannel plate assembly is dThis invention was made with Government support under Contract F19628-84-C-0048 awarded by the Department of the Air Force. The government has certain rights in the invention.

Abstract: A method for fixing a window member having a layer of electrically conductive material to a can of an infrared detector over an incident opening extending through a surface of the can is performed by adhering the window member to the can with a non-conductive adhesive applied between an end surface and a side circumferential surface of the window member and a surface of the casing while leaving a portion of the side circumferential surface, formed by the electrically conductive material layer, partially exposed, masking an opposing end surface of the window member and then covering the result with a thin film of electrically conductive material part of which extends between the exposed side circumferential surface of the electrically conductive material layer of the window member and the surface of the can. Finally, the mask and the portion of the thin film of electrically conductive material covering the mask are removed.

Abstract: An electron tube comprising a window having a radiation-sensitive layer. The window is laid on a bearing surface of an envelope, normal to the tube axis. There is no sealing material in the seam between the bearing surface and the window. The seam is sealed hermetically by a mass of indium or an indium alloy in which a metal wire is embedded along the circumference or the seam. The wire can be soldered with indium or an indium alloy. The seal is made by locally melting the indium or the indium alloy by a heated ultrasonically vibrating heat transfer member. The heat transfer member traverses the circumference of the seam.

Abstract: For thermocompression sealing at least one of the materials to be joined is provided with an oxide skin before or during the sealing operation. The oxide skin can be formed, for example by firing in air. It has been found that the method is particularly advantageous for seals between a CrNi-alloy and, for example a second element which consists of aluminium, for example the seal between an Al entrance window and a CrNi-steel envelope of an X-ray intensifier tube. Notably by addition of an intermediate material, in particular aluminium, seals can thus be realized between many materials.

Abstract: According to the invention, said jacket has an input port integral with a central ferrous alloy body, which is made from an alloy of aluminium and magnesium of series 5000. This input port is fitted into an aluminium part of series 1000, to which it is welded. The aluminium part is brazed to the central body by aluminium-silicon or aluminium-silicon-magnesium eutectic brazing.

Abstract: An x-ray image intensifier having a tube bulb and an output window being mounted in a metal frame. The frame is inserted into the tube bulb and attached to the tube bulb in a region of the output window characterized by the output window being a glass window having a luminophor layer applied thereto, the output window being connected to the frame by only a single metal solder connection of soft solder so that the pane having the luminophor layer can be soldered to the frame without damaging the luminophor layer. Preferably, a peripheral edge of the window pane is free of the luminophor layer, and this peripheral edge has at least one adhesive layer deposited at the location for the solder connection.

Abstract: A seal button comprising a first circular portion having a diameter approximately equal to the outside diameter of the arc tube, the first circular portion having a groove extending across the diameter of the first circular portion, the groove having a depth greater than or approximately equal to the thickness of the first circular portion; and a second circular portion concentric with and extending from the first circular portion, the second circular portion having a diameter of appropriate length for being inserted into an end of the arc tube; the seal button having an opening extending axially through the approximate center thereof, the opening being configured for receiving the electrical feedthrough portion of an electrode assembly.

Abstract: An improved high pressure sodium lamp is described utilizing a polycrystalline alumina arc tube that is hermetically sealed, at least at one end, with a polycrystalline alumina end closure. Said end closure novel member is shaped as a flat disc having the contour and size permitting partial insertion into the internal opening of said arc tube, along with having a larger size projection located adjacent one major surface of said disc externally of said arc tube and with said disc being hermetically sealed directly to said arc tube. In a preferred embodiment, said end enclosure member further includes a central aperture through which extends one of the thermionic electrodes contained within said arc tube.

Abstract: A method of making a dual envelope lamp wherein a first envelope is formed having opposite sealed ends with conductive wires projecting therefrom. A formed reflector is welded at one end thereof to one wire and wrapped about the first envelope's opposite sealed end. Conductors are connected (welded) to the other wire and the opposite end of the reflector, respectively. This reflector, first envelope and conductor assembly is then slidably inserted within the open end of a piece of quartz tubing and a press sealed formed about the conductors. Subsequently, the tubing is flushed (e.g., with argon) and filled with an inert gas at a fixed pressure, followed by a tipping operation in which the opposite end of the tubing is sealed to thus define the second (outer) envelope.

Abstract: An improved hermetic seal means for use in an electroluminescent display device for joining the protective cover sheet (glass) over the base substrate. The base substrate has typically deposited thereon multiple thin film layers. The hermetic seal comprises an electrically insulative thin film layer disposed over the conductive thin film leads associated with the multiple thin film layers, and metallic solder means over the insulative thin film layer to provide a bond between the cover sheet and base substrate.

Abstract: A flat panel display of the type in which an electrode structure is disposed in a vacuum chamber between a front glass panel and a foil backing sheet is provided with a gas-impervious electrical connector sealably mounted over an opening in the foil sheet so as to be physically held in place within the panel by the ambient pressure on the exterior side of the connector.

Abstract: A compact fluorescent employs a plurality of separate tubes. The ends of the tubes are formed to provide arc tight, depth regulating means in the form of a reduced diameter to seal within apertured arc directors.

Abstract: The method of making a display panel 10 comprising forming an assembly of a glass base plate having a set of longitudinal first slots in which anode electrodes are secured and having an array of cathode electrodes seated on the top surface of the base plate and oriented transverse to the anodes. An apertured electrode plate is disposed adjacent to the base plate and its electrodes, and a face plate assembly is prepared by providing a glass plate and forming on one surface, in order, a large-area electrode and one or more insulating layers, after which an apertured insulating layer is formed thereon by a photo-etching process. The face plate assembly carrying the apertured insulating layer is assembled with the other parts of the panel, and the panel is processed to completion.

Abstract: A vacuum container of a radiation image multiplier tube is disclosed, which is provided with a radiation input window made of Al or an Al alloy and an output portion made of a glass or ceramic insulator for outputting radiation image multiplied signals. Between the input window and the output portion is interposed a ring made of Fe or an Fe alloy, and an airtight joint between the ring of the input window is effected by hot pressure-bonding through a thin layer of Ni, Cu or Al. A method of manufacturing the vacuum container by means of such hot pressure-bonding is also disclosed.

Abstract: A sealed beam headlamp unit having an improved sealed exhaust hole is disclosed. Further disclosed is a method of applying the seal of the exhaust hole.

Abstract: Method for vacuum-tight butt joining by brazing a stainless steel part to a ceramic part, in particular stainless steel end caps to a ceramic housing of a vacuum switch, in which the stainless steel part is annealed prior to the brazing step and the portion of the stainless steel part directly adjoining the ceramic part at the brazing joint location is of a thickness not exceeding 0.8 mm and a height between about 4 and 12 mm.

Abstract: A flat-panel display is constructed by sealing a metal flange to a frame on a glass pane, then mounting an electrode structure against the pane within the frame, then placing an impervious malleable sheet over the electrode structure, then sealing the sheet to the flange, and then pumping air from the space between the sheet and the glass pane, and backfilling as required.

Abstract: A thyristor housing and method of its manufacture in which a gate tube passing through a radially directed bore in a tubular insulator is hermetically sealed by metal closures at each end to prevent accumulation of contaminants inside the gate tube during final plating the metal parts secured to said housing. The metal closure on the inwardly directed end of the gate tube is frangible for receiving a lead from the thyristor to be packaged in the housing.

Abstract: A method of constructing a gas discharge display device in such a manner that contaminants found within the completed display are significantly reduced. The process for assembly of the display incorporates the utilization of a spacer member having a higher melting temperature than the display's perimeter seal and is designed to hold the plates apart without letting certain portions of the sealing material contact the opposing substrate. The use of the spacer member of high temperature material permits a higher temperature to be achieved in the vacuum furnace for evacuating the contaminants produced by out-gassing of impurities in the dielectric and conductive materials as well as the glass substrates and the sealing material. The sealing time for the display after evacuation is shortened to prevent or greatly reduce the possible entrapment of impurities in the display during the higher temperature final sealing step.

Abstract: An improved plastic reflector member for a parabolic aluminized reflector (PAR) lamp is disclosed and, in particular, use of said improved plastic reflector member for an all plastic PAR lamp or a PAR lamp which uses said improved reflector member. Said improved plastic reflector member utilizes a variable thickness wall member to form the parabolic shaped cavity wherein the wall thickness is sufficiently greater in the apex region of said parabolic cavity than in the adjoining wall region to avoid mechanical and heat distortion.