Abstract: An evacuated cavity is hermetically sealed between a baseplate and faceplate of a flat panel display. Melting a glass powder, or frit, on the perimeter of the viewing area forms the hermetic seal. After melting the frit, a first fluid is circulated through the cavity to speed cooling. To further expedite the cooling of the flat panel display, a second fluid flows externally along the contour of the flat panel display to insure that the cooling is uniform and thereby avoid thermal shock.

Abstract: A projection television set having a screen and three projection units each capable of projecting a monochromatic image onto the screen. The projection units each having a cathode ray tube (CRT) optically coupled to a projection lens, which includes both a C-lens and a compound lens. A spacer preferably having three optical passageways is coupled to and between the CRTs and projection lenses such that three coolant chambers are formed. Preferably, the spacer includes fluid passageways that interconnect the coolant chambers. The spacer also includes coolant fill ports and reservoirs, zero pressure gum tanks seated in the reservoirs, and a plurality of heat exchanging ribs. Additionally, a fill port closure member preferably includes a push plug and packing sleeve. The plug and sleeve preferably include position retaining components and sealing components.

Abstract: A magnetron including a tubular metallic container which is air-tightly connected to an anode, cathode leads for supporting a cathode with filaments being disposed in a central axial portion of the anode, a stem insulator formed with through holes through which the cathode leads pass, and external terminals formed with planar portions which are air-tightly connected to a surface of the stem insulator opposite to a surface facing the tubular metallic container and with connecting portions which are air-tightly connected to the cathode leads. The connecting portions are arranged to be bent in an axial direction of the cathode leads. It is possible to exhibit the effect of preventing vacuum break from occurring by oxidation or the like since the increase in the area of the connecting portions will result in elongation of the distance between the end portions of the connecting portions and the through holes.

Abstract: A cooling structure of a projection tube having a following constitution is disclosed. A chamber in which a liquid coolant for cooling a panel surface is filled is formed on the panel surface of the projection tube and the chamber is defined by the panel surface, a lens which faces the panel surface in an opposed manner and a metal envelope which radiates heat. A first seal member is disposed between the metal envelope and the panel surface, while a second seal member is disposed between the metal envelope and the lens. A holder for pressing the lens in the direction toward the metal envelope is disposed in the periphery of the lens. Pads which have surfaces approximately perpendicular to a tube axis of the projection tube are formed on a funnel portion of the projection tube. A sustainer for supporting the chamber is brought into contact with the pads.

Abstract: A coupler for coupling a projection lens to a cathode ray tube consists of a metallic plate having a first side and a second side, the first side for mounting to the faceplate of the cathode ray tube in a fluid tight relationship and the second side for mounting to a lens plate. The metallic plate is covered with a non-reflective coating and has at least one through hole for mounting to CRT rails. A plurality of ribbs protrude from the second side of the metallic plate from at least one of the at least one through holes and the ribbs surround the through hole. Upon mounting of a fastening device in the at least one through hole, the fastening device comes into contact with a top surface of the ribbs and the non-reflective coating is removed from the ribbs, thereby forming a ground connection for the coupler.

Abstract: An electric discharge lamp includes a light transmissive inner jacket that defines a sealed inner chamber, a first material in the inner chamber that emits light when activated, and a light transmissive outer jacket around the inner jacket. The outer jacket defines a sealed outer chamber between the inner and outer jackets that contains a second fill material. The second fill material, when activated by heat from the inner chamber when the lamp is operating, converts ultraviolet (UV) and deep blue light emitted from the inner chamber to visible light, thereby increasing an amount of visible light transmitted through the outer jacket compared to an amount of visible light transmitted through the inner jacket.

Abstract: A cooling structure of a projection tube having a following constitution is disclosed. A chamber in which a liquid coolant for cooling a panel surface is filled is formed on the panel surface of the projection tube and the chamber is defined by the panel surface, a lens which faces the panel surface in an opposed manner and a metal envelope which radiates heat. A first seal member is disposed between the metal envelope and the panel surface, while a second seal member is disposed between the metal envelope and the lens. A holder for pressing the lens in the direction toward the metal envelope is disposed in the periphery of the lens. Pads which have surfaces approximately perpendicular to a tube axis of the projection tube are formed on a funnel portion of the projection tube. A sustainer for supporting the chamber is brought into contact with the pads.

Abstract: Passive heat transfer apparatus is provided for an X-ray imaging system used in connection with mammaography, to rapidly conduct heat away from the system X-ray tube. The apparatus comprises a thermally conductive support plate located in the tube housing, in spaced apart relationship with the X-ray tube, and further comprises an elongated device for transferring heat by convection, such as a heat pipe. The heat transfer device has a first end joined to the tube, and a second end joined to the support plate. A quantity of selected working fluid sealably contained in the heat transfer device is disposed to transfer heat along the length thereof, from the tube to the support plate, and cooling fins extending through the housing from the support plate dissipate the heat into the surrounding environment.

Abstract: A dielectric-barrier discharge lamp device that can reliably prevent leakage of the coolant fluid used to cool the dielectric-barrier discharge lamp, and that can reliably cool the dielectric-barrier discharge lamp, is achieved by the dielectric-barrier discharge lamp device having a dielectric-barrier discharge lamp (1) with a hollow-cylinder-shaped discharge space (P) formed by an outer tube (3) that is roughly cylindrical in external shape and a co-axial inner tube (2), in which the inner tube (2) has a cylindrical tube extension (2A) that extends outward from the discharge space (4), and in which the outer periphery of the end (2A1) of the tube extension (2A) is held tightly by a coupler fitting (8) connected to a guide tube (11) through which a coolant fluid flows.

Abstract: An electrodeless low pressure discharge lamp comprises an envelope made from a straight tube and a reentry cavity sealed to one of tube's ends. The cavity has several hollow ferrite cores separated from each other with a few mm distance. Each ferrite core has an induction coil of few turns wound around the core. Each cavity has a cooling copper tube or rod located inside the ferrite core that removes heat from the cores and dumps the heat into a heat sink welded to the cooling tube/rod thereby keep the temperature of the ferrite cores below their Curie point. Each induction coil is electrically connected to the matching network while all matching networks are connected in parallel to the high frequency power source (driver). Inductively coupled plasmas generated in the envelope by several core/coil assemblies produce axially uniform UV and visible radiation.

Abstract: A cooling structure of a projection tube having a following constitution is disclosed. A chamber in which a liquid coolant for cooling a panel surface is filled is formed on the panel surface of the projection tube and the chamber is defined by the panel surface, a lens which faces the panel surface in an opposed manner and a metal envelope which radiates heat. A first seal member is disposed between the metal envelope and the panel surface, while a second seal member is disposed between the metal envelope and the lens. A holder for pressing the lens in the direction toward the metal envelope is disposed in the periphery of the lens. Pads which have surfaces approximately perpendicular to a tube axis of the projection tube are formed on a funnel portion of the projection tube. A sustainer for supporting the chamber is brought into contact with the pads.

Abstract: A coupler for coupling a projection lens to a cathode ray tube consists of a metallic plate having a first side and a second side, the first side for mounting to the faceplate of the cathode ray tube in a fluid tight relationship and the second side for mounting to a lens plate. The metallic plate is covered with a non-reflective coating and has at least one through hole for mounting to CRT rails. A plurality of ribbs protrude from the second side of the metallic plate from at least one of the at least one through holes and the ribbs surround the through hole. Upon mounting of a fastening device in the at least one through hole, the fastening device comes into contact with a top surface of the ribbs and the non-reflective coating is removed from the ribbs, thereby forming a ground connection for the coupler.

Abstract: An oil-cooling system is provided for a multi-staged depressed collector of a linear beam device, such as an inductive output tube or klystron. The multi-staged depressed collector comprises a plurality of electrode stages adapted to have respective electric potentials applied thereto. The electrode stages are separated from one another by respective electrical insulators. The electrode stages are provided with a plurality of channels that extend axially along the outer surfaces of the electrodes. An inner sleeve is disposed in contact with the outer surface of the electrode stages and substantially encloses the plurality of channels. An outer sleeve encloses the inner sleeve with a space defined therebetween. The inner sleeve further includes an opening at an end thereof providing an oil communication path between the space between the inner and outer sleeves, and the plurality of axially extending channels.

Abstract: An oil-cooling system is provided for a multi-staged depressed collector of a linear beam device, such as an inductive output tube or klystron. The multi-staged depressed collector comprises a plurality of electrode stages adapted to have respective electric potentials applied thereto. The electrode stages are separated from one another by respective electrical insulators. The electrode stages are provided with a plurality of channels that extend axially along the outer surfaces of the electrodes. An inner sleeve is disposed in contact with the outer surface of the electrode stages and substantially encloses the plurality of channels. An outer sleeve encloses the inner sleeve with a space defined therebetween. The inner sleeve further includes an opening at an end thereof providing an oil communication path between the space between the inner and outer sleeves, and the plurality of axially extending channels.

Abstract: A ceramic metal halide arc tube is surrounded by a protective sleeve supported by a metal frame having current carrying wire frame members brazed into the metal ferrules of a PAR-lamp. Each frame member has an S-shaped bend which engages the lower end of the sleeve, and a spacer separates the upper ends of the frame to create a rigid self-supporting structure.

Abstract: There are provided a decomposition apparatus by emission of a UV light which is irradiated from an excimer lamp, a decomposition method thereof and an excimer lamp and an excimer emission apparatus which may suitable be used for a decomposition apparatus and a decomposition method of an organic compound. The decomposition apparatus comprises an excimer lamp emitting UV light for decomposing the organic compound and a decomposition container provided with the excimer lamp for decomposing the organic compound in a liquid or a gas. In the decomposition apparatus, since the UV light irradiated from excimer lamp is emitted to the liquid or the gas, the organic compound in the liquid or the gas can be decomposed easily by the simple decomposition apparatus and method.

Abstract: An electrodeless lamp has a gas containing chamber with a first electrode and a second electrode, each surrounded by a dielectric, within the gas chamber and an AC source coupled between the first and second electrodes. In another aspect, the electrodeless lamp has a gas containing chamber with a dielectric chamber wall, a first electrode extending along the dielectric chamber wall outside of the gas containing chamber, a wound second electrode surrounded by a dielectric within the gas chamber, and an AC source coupled between the first and second electrodes.

Abstract: A drift tube linear accelerator (DTL) incorporating an improved drift tube design, wherein the DTL comprises a resonance chamber maintaining a vacuum and having an inlet port and an exit port, an RF field source producing an oscillating radio frequency field within the chamber, and a plurality of substantially cylindrical drift tubes comprising a hollow body having a low energy end and a high energy end and housing a magnet, a low energy end cap attached to the low energy end of the hollow body and a high energy end cap attached to the high energy end of the hollow body, and a stem extending from said hollow body to an inner surface of the resonance chamber.

Abstract: A liquid cooling type cathode-ray tube for a projector comprising a coupler (43) mounted on the front surface (42a) of a cathode-ray tube body (42), which coupler serves as a cooling liquid sealing member and which is sealed with a cooling liquid (46) therein, the coupler (43) having a liquid fill hole (53) and a diaphragm (51) as a pressure regulating valve on the front surface thereof, and all of the mounting bores provided through the coupler being formed in the tubular axis direction of the cathode-ray tube body (42).

Abstract: There can be avoided a contrast degradation caused by stray light generated from a liquid-cooling type cathode-ray tube apparatus incorporated in a projection type television apparatus. Stray light (7) emitted from a flange (peripheral edge) (11a) of a lens (11) out of a coupler (10) and the lens (11) disposed on the front face of a CRT 1 of a liquid-cooling type cathode-ray tube apparatus 5 is shield by light shielding members (ribs) (20), (20a) disposed in the coupler (10) and/or a lens plate (13).

Abstract: In an electron gun, a conductive chamber defines a cavity. A photocathode is disposed in the cavity. Photoelectrons are emitted from the photocathode into the cavity when light is applied to the photocathode. A wave guide mounted on the conductive chamber introduces a micro wave into the cavity. Via an opening formed in the wall of the conductive chamber, the photoelectrons are output to the outside of the cavity. Coolant is flowed through a flow path formed in the wall of the conductive chamber, to suppress a temperature rise of the conductive chamber.

Abstract: Liquid-cooled discharge lamps of, for example, UV type are employed for sterilising objects, for example, packaging containers for foods. In lamps displaying a U-shaped luminant body and with a surrounding liquid container or envelope, cooling is improved according to the invention in that the base is provided with inflow and outflow channels for liquid, an inflow channel being directed towards the curved section of the luminant body. Whereby, cooling of the warmest section of the luminant body will be optimised, which results in a considerably lengthened service life for the lamp.

Abstract: A non-electrode discharge lamp apparatus comprises a discharge tube, exciting coils wound on an outer periphery of the discharge tube, a vessel, having liquid-tightness, containing the discharge tube and the exciting coil means, and lead line guiding means for guiding lead lines connected to the exciting coils to the outside of the vessel, thereby supplying high frequency electric power to the exciting coils through the lead lines. Liquid is prevented from directly contacting the discharge tube and the exciting coils, temperature of the discharge tube can be suitably maintained, and an irradiation efficiency of ultraviolet rays can be prevented from being reduced.

Abstract: A high-power, fluid-cooled magnetron. Hollow anode members surrounding a central cathode are provided with a trapezoidal cross section. The anterior and lateral surfaces of each anode member are covered with a thermally insulating layer, which in turn is covered with a refractory metal shield. When plasma electrodes strike and heat the anode members, heat is conducted uniformly into the interior of the anode members and dissipated by natural convection of a cooling fluid that circulates through the anode members.

Abstract: Apparatus for sealing a chamber having a liquid coolant used for dissipating heat generated by a CRT. The apparatus includes a chassis for housing the CRT, wherein the chassis includes a tapered fill port having an inner wall. In particular, the fill pole is in fluid communication with the chamber and is used for introducing liquid coolant into the chamber. A sealing element is then positioned in the fill port. The sealing element is fabricated from a material having resilient properties and is sized larger than the fill port such that a press fit is formed wherein said sealing element is urged against said inner wall to form a seal.

Abstract: Microwave amplifiers are disclosed having a hollow helix slow-wave structure coupled directly to input and output waveguides. This helix-waveguide coupling structure couples the TEM mode of the helix to the TE10 mode of the rectangular waveguides and also defines ports communicating with the helix interior. Heating of the helix during high-power operation can be removed by cooling liquid pumped through the helix via these ports. The helix is surrounded by a cylindrical housing containing a low-pressure ionizable gas which forms a plasma channel that focuses the electron beam without the need for surrounding magnetic structures. A plasma cathode electron gun is arranged to inject an electron beam through the helix. Backflowing ions from the housing are harmlessly absorbed into the face of the plasma cathode. The microwave amplifier is converted to a backward wave oscillator by coupling a load to one of the waveguides.

Abstract: In a liquid cooling type cathode-ray tube including a cathode-ray tube assembly (1), a coupler (3) provided in the front surface side of the cathode-ray tube assembly (1) to seal a coolant (9), and fixing members (6) for fixing the coupler (3) to the cathode-ray tube assembly (1), engagement pins (14A), (14B) are fitted into and fixed into a pair of as cast holes (11A), (11B) defined on the coupler (3) or the fixing members (6), and an earth wire (16) which directly closely contacts with an outer conductive film (2) to apply an earth potential to the outer conductive film (2) is extended between a pair of engagement pins (14A) and (14B) through a spring (17). Thus, the earth potential can be applied to the outer conductive film (2) of the liquid cooling type cathode-ray tube with a high reliability and a satisfactory working property.

Abstract: A metal halide lamp includes a cast ceramic reflector almost completely comprised of alumina. A conventional metal halide bulb is positioned within the reflector. A glaze and then a dielectric coating are applied to the inside surface of the reflector, such that appreciable amounts of infrared radiation from the bulb are absorbed into the glaze and ceramic and not reflected into the beam.

Abstract: A fluid optical system for focusing all entering light whatever its direction and incidence, and having an entrance surface through which the light enters. The optical system has a volume having an optical shape generated by a logarithmic spiral so that the focusing occurs for light beams entering the entrance surface from any direction through any point of the entrance surface. There flows in the optical shape a fluid which is maintained in forced circulation to form a fluid optical system, and which is forced to enter the optical system tangentially to the optical shape and adjacent to the entrance surface which is arranged so that initial circulation is tangential and laminar. Inside the optical system, the fluid has a centripetal rotation movement until it exits through a cone end of the optical shape, thus draining off calories.

Abstract: A fluorescent lamp dissipates heat from the lamp tube to a vented air stream within a lamp globe and to ambient air outside of the lamp. The lamp apparatus includes a base that mounts and provides electric current to a fluorescent illumination tube, a vented lamp globe and a thermally conductive heat dissipater engaged with the illumination tube. The heat dissipater thermally conducts heat from the illumination tube and transfers the heat to an air current within the lamp globe. A mounting element mounts the lamp globe and the heat dissipater with the base.

Abstract: A projection cathode ray tube has a liquid coolant coupling apparatus whose structure is improved. The projection cathode ray tube includes a funnel having an electron gun in its neck end and a face plate provided with a screen at the other end, a rectangular radiating plate having a frontal glass corresponding to the face plate having the screen inside thereon, and being firmly attached to the face plate, a liquid coolant layer having a predetermined thickness between the face plate and the frontal glass of the radiating plate, a clamping portion coupled by means of a bolt at each corner of the rectangular radiating plate, and a setting clasp having a contacting surface of a predetermined size in contact with the side of the funnel and a spring both provided over each bolt, whereby the setting clasp settles the funnel while pressing.

Abstract: A secondary coil forming a resonant circuit in cooperation with a quadrupole is composed of conductive tubes and cooled by feeding coolant such as pure water into the tubes which serve as coolant passages. This makes it possible to minimize thermal deformation of the secondary coil when a variable-frequency type radio-frequency quadrupole accelerator is driven with a large amount of power. As a result, variation of the resonant frequency of the resonant circuit, resulting from the deformation of the secondary coil, can be minimized. Consequently, a given ion acceleration ability can be provided. When a coolant passage for use in cooling the primary coil is included and coolant such as pure water is fed into the coolant passage, thermal deformation of the primary coil can be minimized. Thus, impedance matching with the resonant circuit can be maintained on a stable basis.

Abstract: A liquid cooled collector for an electron beam tube. The collector includes a dielectric body through which is formed a central cavity. Within the central cavity are disposed at least one electrode that dissipates the impinging electron beam. The electrodes are thermally coupled to the dielectric body. As such, when the electrodes absorb the electron beam, the resulting heat is conducted into the dielectric body. A plurality of fluid conduits are disposed around the dielectric body wherein at least one side of each conduit is defined by the dielectric body. Furthermore, an input manifold and an output manifold are also partially defined by the dielectric body and interconnect each of the fluid conduits. Each of the fluid conduits extend separately from a point along the input manifold to a point along the output manifold.

Abstract: A projection cathode ray tube has a liquid coolant coupling apparatus whose structure is improved. The projection cathode ray tube includes a funnel having an electron gun in its neck end and a face plate provided with a screen at the other end, a rectangular radiating plate having a frontal glass corresponding to the face plate having the screen inside thereon, and being firmly attached to the face plate, a liquid coolant layer having a predetermined thickness between the face plate and the frontal glass of the radiating plate, a clamping portion coupled by means of a bolt at each corner of the rectangular radiating plate, and a setting clasp having a contacting surface of a predetermined size in contact with the side of the funnel and a spring both provided over each bolt, whereby the setting clasp settles the funnel while pressing.

Abstract: A method and apparatus for preventing contaminated reverse flows in air or gas impingement cooled lamps. In an electrodeless lamp, a stream of clean air or gas is provided as a replacement for contaminated air.

Abstract: In a UV excimer radiator, the ignition behavior during the initial ignition or relatively long operating pauses is improved by providing means for local field distortion in the discharge space. These means can either be local constrictions provided in a pinpointed fashion or a disturbing body made from aluminum oxide or titanium oxide.

Abstract: An electron collector is provided for collecting spent electrons generated by a cathode of an electron gun after passage through an interaction region of a microwave device. The collector comprises a bucket having internal walls which define an enclosed region having an entrance aperture through which electrons pass after exiting the microwave device. An electrode is disposed proximate the entrance aperture within the enclosed region. A positive potential is applied to the electrode with respect to the microwave device. The potential forms a substantially ion-free region at the entrance aperture which promotes the efficient dispersal of the spent electrons due to space charge.

Abstract: A PPM coupled-cavity traveling wave tube has an RF structure comprising a re-entrant double-staggered ladder circuit. Several cavities are separated by iron pole pieces with penetrating slots to provide RF coupling between the cavities. Re-entrant copper bars are attached to both sides of the pole pieces that define the boundaries between adjacent pairs of cavities. These bars extend diametrically across the cavity interior around beam drift tubes The re-entrant bars on adjacent pole pieces are rotated relative to each other by 90 degrees about the beam axis. The bars are hollow along their length, and thereby provide channels for coolant flow around the drift tubes. These channels communicate through apertures with coolant distribution channels in the outer cavity walls extending along the length of the traveling-wave tube.

Abstract: A cooling device for microwave tubes includes a cold part and a heat-conducting member having a first surface in contact with a surface of the cold part. A second surface of the heat-conducting member is in contact with an envelope of the tube. The surface of the cold part and the first surface of the heat-conducting member are respectively concave and convex. The device can be applied to the cooling of microwave tubes including klystrons, travelling-wave tubes and gyrotrons.

Abstract: A printhead for a light emitting diode printer has a transparent substrate with a row of LED dice mounted on the substrate with their light emitting Junctions adjacent to the substrate so as to emit light through the substrate. Each die has a row of LEDs along its length and a row of connection pads at known locations for making electrical connection to the LED anodes. Metal lines are deposited on the transparent substrate at known locations. Solder bumps between the connection pads and metal lines precisely position the dice by reason of surface tension. The dice are positioned in parallel rows with alternate dice staggered from each other for electrical isolation and to avoid mechanical interference at the ends of adjacent dice. In the event placement by way of the solder bumps is insufficiently precise, an opaque layer may be deposited on the substrate with a row of windows adjacent a row of LEDs. The windows are smaller than the LEDs so as to mask edge portions and alleviate alignment requirements.

Abstract: A coolant system for a high power microwave excited plasma tube is described which comprises hydraulic fluid in a coolant system structure for flowing the fluid into heat exchange relationship with the plasma tube. Such a coolant system can operate over the temperature range of -50.degree. to 150.degree. C. and may provide excellent optical transmission from 5700 to 10000 .ANG., thus being useful for cw or pulsed solid state laser pumps.

Abstract: In order to be able in the case of UV high-power omni-directional radiators to direct the generated radiation only in a preferred direction, and to avoid shading by the inner dielectric tube (2), the outer electrodes (4) are arranged only on a part of the circumference of the outer dielectric tubes (1). In this way, the object to be irradiated or the substance to be irradiated can thus be arranged directly in the range of emission of the discharges (7).

Abstract: Device for projecting television pictures by means of an assembly of three television picture tubes with associated lens systems arranged in each other's proximity, including an integrated cooling system. The integrated cooling system has a liquid circuit comprising a first duct extending below the television picture tubes, which duct is in direct communication via passages with the lower ends of the flow spaces, and a second duct extending above the television picture tubes, which duct is in direct communication via passages with the upper ends of the flow spaces. The first and the second duct are connected via at least one connection duct which extends along an end the assembly constituted by the three television picture tubes.

Abstract: A target assembly for a projection cathode ray tube is provided wherein the target member is cooled by convective fluid heat transfer occurring within and around a partially hollow support shaft screw. The target member is a solid block of relatively high, thermally conductive material, such as aluminum, coated with an electron beam sensitive material. The shaft screw also comprises relatively high thermally conductive material, such as copper, and has an internal passage leading from a source of cooling fluid, such as dry air, to a annular array of ports located in a distal portion of the supporting shaft screw. The distal portion of the shaft screw has a flaring cross section for increased heat transfer. A bellows encloses the distal portion forming a passageway so as to cause the cooling fluid to also flow along the external surface of the shaft screw. This arrangement adds to the effective convective heat transfer from the shaft screw to the cooling fluid.

Abstract: In a cooling liquid recirculation system, walls of transparent jacket tubes for cooling a mercury-vapor lamp, which jacket tubes are provided separately from the mercury-vapor in accordance with the prior art are formed in optical filters to thereby decrease the temperature of an object to be illuminated. A recirculation unit of cooling liquid for recirculation of the jacket tubes is connected through an elastic duct to a light source unit such as a mercury-vapor lamp. These components are movable for practical use.

Abstract: An explosion proof light comprising a shatter-resistant, fluid tight, light transmissive case and a fluid tight light source sealed within the case in at least partial spaced-apart relation thereto. An effective quantity of electrically non-conductive fluid extinguishant such as Halon 2402 is sealed within the space between the case and the light source under positive pressure for suppressing sparks resulting from damage to the light causing penetration to the light source and exposure of sparks and intense heat to the environment. An outer housing may preferably be positioned over the case to add further protection.

Abstract: A printhead for a light emitting diode printer has a transparent substrate with a row of LED dice mounted on the substrate with their light emitting junctions adjacent to the substrate so as to emit light through the substrate. Each die has a row of LEDs along its length and a row of connection pads at known locations for making electrical connection to the LED anodes. Metal lines are deposited on the transparent substrate at known locations. Solder bumps between the connection pads and metal lines precisely position the dice by reason of surface tension. The dice are positioned in parallel rows with alternate dice staggered from each other for electrical isolation and to avoid mechanical interference at the ends of adjacent dice. In the event placement by way of the solder bumps is insufficiently precise, an opaque layer may be deposited on the substrate with a row of windows adjacent a row of LEDs. The windows are smaller than the LEDs so as to mask edge portions and alleviate alignment requirements.

Abstract: A surface discharge excimer light source which employs a one sided cell wherein all electrodes and the dielectric are on one side of the discharge space. The light produced by the device is neither shadowed nor attenuated by an electrode, and the electrode temperatures can be closely controlled. The construction of the device eliminates the need to maintain parallelism of the discharge space and close tolerances.

Abstract: A method and apparatus for cooling a cathode ray tube in a projection television receiver including a lens assembly for focusing images formed by the cathode ray tube. A cooling chamber is arranged in front of the cathode ray tube and behind the lens assembly in thermal contact with the face of the cathode ray tube through which the images are projected. This cooling chamber is then filled with an optically clear substantially waterless liquid consisting of an isoparaffinic solvent which is distributed under the trademark ISOPAR V.

Abstract: A cathode-ray tube device for generating a bright light spot is provided, in the path of radiation, a container with a coolant from the cathode-ray tube containing a solution of about 0.5-2.0% by weight of a surfactant selected from the group consisting of sorbitan esters of fatty acids of 12-18 carbons, polyoxyethylene derivatives thereof and ethers of polyoxyethylene in polyethylene glycol 200-300 all of said container in contact with said solution being formed of polymethyl methacrylate and all surfaces of which container are in contact with said solution are provided with a thin layer of silicon dioxide.