Abstract: An apparatus for enriching the isotopic Hg content of mercury is provided. The apparatus includes a reactor, a low pressure electric discharge lamp containing a fill including mercury and an inert gas. A filter is arranged concentrically around the lamp. In a preferred embodiment, constant mercury pressure is maintained in the filter by means of a water-cooled tube that depends from it, the tube having a drop of mercury disposed in it. The reactor is arranged around the filter, whereby radiation from said lamp passes through the filter and into said reactor. The lamp, the filter and the reactor are formed of a material which is transparent to ultraviolet light.

Abstract: A silk-screenable circuit paste which can be screen-printed onto a circuit board with minimum pinholing or void formation is provided. The silk-screenable circuit paste of the present invention includes electrically conductive powder, a binding resin, an organic silicone material, and an organic solvent system including ethylene glycol diacetate and a suitable cosolvent.

Abstract: An improved process for producing a translucent polycrystalline alumina body comprising sintering a prefired compacted green body of alumina of predetermined shape is disclosed. The green body of alumina includes alumina doped with one or more sintering aids. The method of the present invention comprises sintering the prefired compacted green body of predetermined shape at a maximum sintering temperature in an atmosphere containing nitrogen and an amount of hydrogen greater than or equal to about 2.5 volume percent and less than 75 volume percent for a period of time sufficient to produce a translucent polycrystalline alumina body.

Abstract: A method of aligning thin-film structure patterns on a substrate formed with the use of an apertured mask in a vacuum deposition system.

Abstract: Crystalline brominated poly-1,6-di-(N-carbazolyl)-2,4-hexadiyne having at least two bromine atoms per repeat unit is disclosed. The crystalline brominated poly-1,6-di-(N-carbazolyl)-2,4-hexadiyne of the invention is characterized by a Fourier transform infrared spectrum which includes absorption at 795.+-.5, 835.+-.5, and 865.+-.5 cm.sup.-1. A method for preparing the crystalline brominated poly-1,6-di-(N-carbazolyl)-2,4-hexadiyne of the invention is also disclosed.

Abstract: A miniature, low-wattage, discharge lamp operable on direct current employs substantially parallel electrodes sealed in a single press seal. The electrodes are configured to provide an arc which is substantially parallel to the longitudinal axis of the lamp with the cathode being substantially longer than the anode. Heat generated at the anode is dissipated through the seal to the cathode allowing the cathode to operate hot enough to be stable. The chemical fill for the lamp employs a mol ratio of thorium to cesium to permit good light output and good color rendition.

Abstract: An improved flashed-lamp indicator composition comprising a volatile dye, a nonvolatile particulate heat-absorbing material; a binding agent; and inert platelet-shaped particles having an average particle size within the range of from about 0.5 to about 1.5 micron is provided. Also provided is a multilamp photoflash array in which each flash lamp of the array has at least one spot of the improved flashed-lamp indicator composition of the present invention in heat-receiving relationship therewith.

Abstract: A shadow mask is provided which can provide a precise patterning to a deposit at process temperature without destruction of the shadow mask itself. The shadow mask consists of a plurality of metallic strips having a series of interconnecting small arched bridges that hold the strips of the mask together. The shadow mask is used in a process for depositing electrode structures in an electroluminescent device wherein the mask is positioned over a substrate surface to be coated and deposit electrode material is sprayed from a geometrically broad source, through the mask and onto the substrate. Deposition occurs beneath the arched bridges resulting in a pattern deposition that does not readily reveal the presence of bridges because sufficient material is coated beneath to provide cosmetic and electrical continuity between areas separated by the bridges. This invention is particularly suited for a mask designed to provide a fine pattern of closely spaced parallel lines or electrode structures.

Abstract: An apparatus and method for monitoring the flow of mercury in a system. The equipment enables the entrainment of the mercury in a carrier gas e.g., an inert gas, which passes as mercury vapor between a pair of optically transparent windows. The attenuation of the emission is indicative of the quantity of mercury (and its isotopes) in the system. A 253.7 nm light is shone through one of the windows and the unabsorbed light is detected through the other window. The absorption of the 253.7 nm light is thereby measured whereby the quantity of mercury passing between the windows can be determined. The apparatus includes an in-line sensor for measuring the quantity of mercury. It includes a conduit together with a pair of apertures disposed in a face to face relationship and arranged on opposite sides of the conduit. A pair of optically transparent windows are disposed upon a pair of viewing tubes. A portion of each of the tubes is disposed inside of the conduit and within each of the apertures.

Abstract: A phosphor particle having a non-particulate, conformal aluminum oxide coating and a fluorescent lamp incorporating aluminum oxide coated phosphor particles are disclosed. A method for improving the lumen maintenance of a fluorescent lamp is also disclosed. The method involves applying a non-particulate, conformal aluminum oxide coating to the outer surface of individual particles of a finely-divided fluorescent lamp phosphor, applying the coated phosphor particles to a fluorescent lamp envelope, and processing the phosphor coated envelope into a finished lamp.

Abstract: A low wattage metal halide discharge lamp includes a sealed outer envelope with a pair of electrical conductors passing therethrough and containing an arc tube having a pair of electrodes electrically connected to the pair of electrical conductors with a chemical fill within the arc tube including iodides of sodium and scandium of a molar ratio in the range of about 20:1 to 28:1.

Abstract: Compositions based on polypyrrole are described having incorporated therein a polymer component having one or more segments wherein at least one segment is elastomeric. The polymer component is present in an amount of at least about 10 weight percent of the polypyrrole present. The compositions exhibit improved processing properties over those of polypyrrole. Also described is a process for producing the compositions in which a pyrrole compound is electrochemically polymerized in the presence of an at least partially dissolved polymer component having one or more segments wherein at least one segment is elastomeric.

Abstract: An improved primer material for use in a high-voltage photoflash lamp is provided. The primer material includes electrically insulating beads which have been coated with a friction-reducing material. The primer also includes an oxidizing agent, and a binder, and a combustible metal powder, part of the combustible metal powder being in larger particle form. A high-voltage photoflash lamp including the improved primer material of the present invention is also disclosed.

Abstract: A miniaturized multilamp photoflash array includes a printed circuit board with a common circuit extending along one edge and a plurality of contact pads along an opposite edge and a plurality of flashlamps mounted in a direction normal to the edges of the circuit board.

Abstract: A fluorescent lamp has two layers of different phosphors, the underlying phosphor serving to improve the maintenance of the overlying phosphor.

Abstract: A fill composition for a high intensity discharge device including mercury, niobium oxytrihalide, and a molecular stabilization agent is provided. The molar ratio of niobium oxytrihalide to the molecular stabilization agent in the fill is in the range of from about 5:1 to about 7.5:1. Niobium oxytrihalide is present in the fill in sufficient amount to produce, by dissociation in the discharge, atomic niobium, niobium oxide, NbO, and niobium dioxide, NbO.sub.2, with the molar ratio of niobium-containing vapor species to mercury in the fill being in the range of from about 0.01:1 to about 0.50:1; and mercury pressure of about 1 to about 50 atmospheres at lamp operating temperature. There is also provided a high intensity discharge device comprising a sealed light-transmissive arc tube; the arc tube including the above-described fill; and an energizing means for producing an electric discharge within the arc tube.

Abstract: An optically transparent and electrically conductive film is patterned on a ubstrate, for instance in an electro-optical display device such as an electroluminescent device having a patterned transparent electrode layer, by a process utilizing a double masking structure that provides for more positive delineation of thin film device patterns. In this process, an indium tin oxide layer is formed between a metallic pattern on a glass substrate and a photoresist mask. The indium tin oxide layer has a metal lift-off mask under those areas that are to be removed and a photoresist protective mask over those areas that are to remain. The double masking will also provide greater protection to the electrode areas during the critical etching steps in developing an electroluminescent display.

Abstract: A single-ended low wattage high intensity discharge lamp and manufacturing process wherein a sleeve of electrical insulating material having the same coefficient of expansion as quartz is telescoped over an electrical lead a fuzed to the "pinch" seal portion of a quartz envelope.

Abstract: Chemical modification of crystalline poly-1,6-di-(N-carbazolyl)-2,4-hexadiyne is disclosed. There is provided a chlorinated poly-1,6-di-(N-carbazolyl)-2,4-hexadiyne having at least 12 chlorine atoms per repeat unit. The chlorinated poly-1,6-di-(N-carbazolyl)-2,4-hexadiyne of the invention is characterized by a Fourier transform infrared (FTIR) spectrum including peaks at about 745.+-.5, 798.+-.5, and 851.+-.5 cm.sup.-1. There is also provided a nitrated poly-1,6-di-(N-carbazolyl)-2,4-hexadiyne having at least 2 nitro groups per repeat unit. The nitrated poly-1,6-di-(N-carbazolyl)-2,4-hexadiyne of the invention is characterized by an FTIR spectrum including absorption at about 1511.+-.5, 1342.+-.5, 794.+-.5, 751.+-.5, and 718.+-.5 cm.sup.-1.

Abstract: A multilamp photoflash device comprising an outer housing containing a plurality of flashlamps and means for sequentially flashing the flashlamps of the device and having an antistatic coating on the surface of the outer housing is provided. The antistatic coating comprises an anionic surfactant and a deliquescent salt. A method for inhibiting electrostatic charge buildup in a multilamp photoflash device comprising an outer housing containing a plurality of flashlamps and means for sequentially flashing the flashlamps of the device is also provided. The method includes applying an antistat solution comprising an anionic surfactant and a deliquescent salt dissolved in a solvent to the surface of the outer housing of the multilamp photoflash device and evaporating the solvent from the antistat solution on the surface of the outer housing so as to form an antistatic coating thereon. The coating comprises the anionic surfactant and deliquescent salt components of the antistat solution.