Abstract: A xenon flash tube is disclosed utilizing a particular borosilicate glass for the lamp envelope which is sealed directly by hermetic seal to inleads of a metal alloy predominantly of iron, nickel and cobalt. Additionally, said flash tube employs particular electron emission means in the form of a porous sintered body of refractory metal having an electron emissive material dispersed therein. This flash tube construction can be operated at reasonably high energy loadings for an extended number of flashes without experiencing significant light output deterioration.

Abstract: This invention relates to fuses for electrical plugs and more particularly to a high and low overcurrent stratified fuse for use in a low power electrical circuit. The fuse has a layered construction in which a particulate conductive link is cooperatively applied and adhered to a heat deformable substrate. The substrate in a further preferred embodiment is thermally isolated by an insulating layer abutting the substrate on the side opposite the conductive link. The conductive link melts or disintegrates in response to high over current conditions. The substrate deforms and breaks the conductive link applied thereto in response to low over current conditions.

Abstract: Luminaire for illuminating stacked material along warehouse aisles. The luminaire comprises a high intensity discharge lamp mounted vertically in a reflector having a somewhat flattened bell shape and formed of four reflector segments of somewhat trapezoidal shape arranged symmetrically about the light source, each reflector segment being parabolic in vertical section and elliptical in horizontal section.

Abstract: A reflector unit is shaped from a plastic sheet to provide a plurality of individual reflectors having raised radiation barriers between adjacent reflectors. Ribs are provided in the radiation barriers to prevent stacked reflector units from sticking together during manufacture of flash arrays.

Abstract: An improved solid state radiant energy switch device is described for operation with a plurality of flash lamps fired individually and in sequence and which is activated by radiant energy generated during flashing of the lamps to convert from a high electrical resistance ("off" condition) to a low electrical resistance or conductive state ("on" condition). Said switches are prepared from an improved material composition which undergoes chemical conversion comprising a carbon-containing silver salt admixed with a humidity-resistant organic polymer binder in ratios wherein said polymer binder does not exceed more than about three percent by weight in said admixture.

Abstract: Floodlight has a reflector mounted for selective adjustment to different positions relative to the light source for providing desired light distribution.

Abstract: A sealed beam headlamp having a lamp terminal formed from a closed end eyelet which is inserted within a lug for forming a metal barrier which is bonded within an envelope opening. The lamp terminal is impervious to moisture and closely fits the envelope opening with voids between the terminal and the envelope being filled by a sealant.

Abstract: An improved incandescent lamp filament is described having an inner core of doped tungsten crystals with a surface layer of chemically vapor deposited undoped tungsten crystals. The inner core material exhibits the sag-resistant grain structure obtained with dispersion alloy products of tungsten whereas the unalloyed tungsten crystals in the surface layer are of a finer size and can further exhibit a preferred crystallographic orientation. Incandescent lamps utilizing said improved tungsten filaments exhibit increased vibration resistance and greater notch resistance when operated on direct current.

Abstract: A method is described for making a shaped silicon carbide-silicon matrix composite. A confined carbon fiber preform is infiltrated with sufficient molten silicon metal at a temperature in the range of from about 1400.degree. C. to about 1800.degree. C. in an inert atmosphere or vacuum. Silicon carbide powder can also be incorporated in the preform structure.

Abstract: An electric lamp filament of tungsten is disclosed that has been coiled and heat-treated to at least 1600.degree. C. on a wire mandrel containing molybdenum but which is essentially free of molybdenum contamination. A barrier layer of tungsten or tantalum is provided on said mandrel to preclude the molybdenum contamination and the coated mandrel can thereafter be dissolved from the uncontaminated tungsten filament coil in an acid mixture.

Abstract: Improved fuse arrangement used with the circuit board to provide more reliable sequential firing in a flash lamp array. The circuit board includes a lamp firing circuitry along with radiation switches connected in said circuitry and a more reliable series connected fuse arrangement to cooperate with said radiation switches in the circuit operation. The individual fuse elements are constructed as an integral part of the lamp firing circuit pattern deposited on the circuit board at circuit locations wherein the underlying circuit board substrate has a thickness less than the substrate thicknesss elsewhere and desirably cooperate in raising the dielectric breakdown voltage characteristic of the fuse combination.

Abstract: A blown glass reflector lamp having an ellipsoidal reflector and a clear or lightly frosted face is disclosed.