Abstract: An inventive spacing structure is a unitary structure of uniform height including a multitude of rail members framed by and interconnected with a multitude of frame members. The frame and rail members project between a flat panel display's face and base panels across a substantial area of their facing surfaces. As a result, the unitary spacing structure spaces a substantial portion of the face panel away from the base panel in a substantially parallel spaced apart relationship with the base panel. Because the inventive spacing structure is a unitary structure, it can be conveniently manufactured apart from the flat panel display and then easily aligned with the image generating apparatus of the display. Thus, the unitary spacing structure can help to make flat panel displays less difficult, time-consuming and costly to manufacture.

Abstract: The present invention broadly provides an improvement in a deuterium arc lamp having structure (e.g., anode 27, baffle 28, etc.) mounted on the distal end of an electrical conductor (26) within an elongated tubular glass envelope (21) in spaced relation to the side wall (22) of the envelope. The improvement broadly comprises spacer means (24), such as axially-spaced disk-like first and second members (32, 33), that operatively engage the structure, and that restrain transverse movement of such structure within the envelope.

Abstract: An electron gun without deviation of diameter between grids, having a good object point diameter shape, and having a high cut-off voltage, which is cheap and has high performance, and a cathode ray tube provided with the same. The electron gun is provided with a spacer of a columnar shape which has surfaces facing each other on its two end surfaces, a beam aperture penetrating the spacer between the end surfaces, and conductive films provided on the two end surfaces, in which at least the circumferential wall of the beam aperture is constituted by a high resistance conductive material, the conductive films being used to constitute the grids and the beam aperture being constituted as an aperture for an electron beam.

Abstract: A lamp bulb for a Christmas tree light set including two filaments connected between two lead-in wires thereof at different elevations above a mica disc.

Abstract: The present invention relates to a short arc discharge lamp having a quartz envelope with a bulb and a support for supporting at least one electrode rod within the quartz envelope for specific alignment. The support includes a collar surrounding the at least one electrode rod and being made from a material having a melting point above an operating temperature of the short arc lamp. The collar also has at least one coil spring and at least one placement means for placing at least one coil spring around an outer surface of said collar. Connected to the support is a securing piece for securing the collar to the at least one electrode rod.

Abstract: An image-forming apparatus comprises a back plate carrying thereon a plurality of electron-emitting devices, a face plate arranged vis-a-vis the back plate and carrying thereon a fluorescent member and an anti-atmospheric-pressure spacer. The longitudinal axis of the anti-atmospheric-pressure spacer is arranged substantially in parallel with the direction of deflection of electron beams emitted from said electron-emitting devices.

Abstract: The present invention provides image display panels, spacer units for the same and methods for making and using the same. The spacer units include an assembly having at least one layer of generally parallel fibers which form passageways which permit the passage of energy therethrough between the emitter and the display of an image display panel. A sealing frame has a support which is positioned about and engages the periphery or side of the spacer, the emitter and the display. The sealing frame has a sealing material for providing an essentially sealed region between the spacer, emitter and display. Methods of making and using such spacer units in image display panels are also included in the present invention.

Abstract: A spacer (200) for a field emission display (201) is disclosed. The spacer (200) includes a lower resistive region (220) and an upper insulative region (222). The spacer (200) has a member (210) which is coated with a resistive coating (212) extending between the lower end of the member and a height (h.sub.2) less than the total height (h.sub.1) of the spacer (200). An insulative coating (218) is formed on the member (210) and extends between the upper end of the resistive coating (212) and the upper end of the member (210). The resistive coating (212) has a secondary electron yield less than 2 over the lower resistive region (220) of the spacer (200). The insulative coating (218) has a secondary electron yield between 0.75-2 over the upper insulative region (222) of the spacer (200).

Abstract: A gas discharge tube includes an envelope for sealing a gas, lead pins and a light-emitting assembly. The light-emitting assembly includes: a focusing electrode support member of a conductive material; a hot cathode for emitting thermoelectrons; an anode for receiving thermoelectrons; a focusing electrode for converging paths of thermoelectrons; a spacer of an insulator being arranged between the focusing electrode support member and the anode; and an anode support member of an insulator for pushing the anode onto the focusing electrode support member through the spacer. A gas discharge tube having a long service life and capable of improving the operational stability during long-time continuous light emission can be provided.

Abstract: The present invention is a thin filament embedded in a low density aerogel for use in radiation detection instruments and incandescent lamps. The aerogel provides a supportive matrix that is thermally and electrically nonconductive, mechanically strong, highly porous, gas-permeable, and transparent to ionizing radiation over short distances. A low density, open-cell aerogel is cast around a fine filament or wire, which allows the wire to be positioned with little or no tension and keeps the wire in place in the event of breakage. The aerogel support reduces the stresses on the wire caused by vibrational, gravitational, electrical, and mechanical forces.

Abstract: A display device having a row of emitting elements and an electron-optical system for the electron beams emitted by the said elements. The electron-optical system includes bodies to which common row electrodes are secured so that the assembly of the electron-optical system is simplified. The electrodes may be provided either as separate elements fitting into slots in the body walls, or as layers on the walls, formed for example by vacuum evaporation.

Abstract: An electrode arrangement for creation of a corona over an area. The arrangement includes a corona driving portion and a corona emitting portion in electrical contact with the corona driving portion. The corona driving portion is much larger in size than the corona emitting portion such that corona from the electrode arrangement is emitted from the corona emitting portion in a direction away from the corona driving portion. The corona emitting portion is comprised of a series of stepped, generally concentric, spaced corona emitting rings about a center emitting element. The locations of the rings and emitting element are such that a corona is produced over a circular area rather than an annular ring.

Abstract: An electron gun for a vacuum tube employs a mounting element having an inner annular section with a defined thickness made to predetermined dimensional tolerances. The cathode subassembly is positioned on one surface of the annular section and a grid electrode is located on the opposing surface. When the mounting element is set within the vacuum tube facing the anode electrode, the location of the cathode subassembly and grid electrode in the mounting element establishes a precise cathode-to-anode spacing and the electrodes are properly aligned and concentric to a central axis along which the electron beam travels.

Abstract: A short-arc lamp of the type having an internally integral reflector including electrodes mounted to extend along a central axis of symmetry of the lamp and having distal ends of similar shape which are spaced apart to define a short-arc gap such that the lamp can be directly driven by alternating current.

Abstract: An electrode arrangement for creation of a corona. The arrangement includes a corona driving portion and a corona emitting portion in electrical contact with the corona driving portion. The corona driving portion is much larger in size than the corona emitting portion such that corona from the electrode arrangement is emitted essentially from the corona emitting element in a direction away from the corona driving element. In the illustrated embodiments of the invention, the corona driving element comprises a rod with a chain-like corona emitting element suspended adjacent to the rod. In another embodiment of the invention, the corona driving element comprises a flat disc and the corona emitting element comprises a tapered ring at the outer circumference of the disc.

Abstract: Improved end blocks for the electrode array of a multicell radiation detector support the array and isolate it from the interior walls of an enclosed ionization chamber. A plunger extends from the rear wall of each end block and is biased by a spring within the end block to bear against the rear wall of the detector chamber, biasing the electrode array forwardly against front spacers to position the front edges of the electrodes in equidistantly spaced relation to a x-ray transmissive window formed in the front wall of the detector housing. The bias exerted by the springs is adjustable. A tool is inserted into each end block during assembly of the detector to retract the plungers while the array is being positioned within the opened ionization chamber.The invention greatly reduces noise in the detector caused by microphonics, thus improving the integrity of the detected signal and permitting shorter scanning times and other advantages.

Abstract: A novel electron gun assembly having at least one generally longitudinally-extending electron beam path includes a plurality of electrodes attached to at least two electrically-insulating support rods. Each of the support rods has a surface having at least two indexing cavities formed therein for aligning the support rods along the beam path.