Abstract: Luminaire with high intensity gaseous discharge lamp for illuminating a work area such as an automobile assembly line. The lamp is arranged between a concave main reflector and an auxiliary reflector facing the central portion of the main reflector. The arrangement is such that it provides adequate light control to efficiently illuminate the work area while shielding the lamp from direct view of the worker and reducing shadows on the work area due to the worker being positioned between the work and the luminaire.

Abstract: Polycrystalline alumina tubing is scribed by means of laser pulses which are reiteratively focused on the same spots at spaced time intervals. By drilling small holes, the laser need be on for a very short period of time only, and only the surface layers are vaporized, thereby minimizing heat shock. The holes are deepened by repeating the series of pulses and directing them sequentially into the same holes. For tubing, an encoder is used which senses the angular position of the tubing as it is rotated and causes the laser to deliver pulses at the same angles at every revolution. When the holes have been sufficiently deepened, the tubing is snapped and breaks clean in the plane of the holes.

Abstract: Highly purified metal halide salts are made into a frangible stick having uniformly spaced lines of weakness which permit the stick to be broken readily into cylindrical pellets of uniform size. The pellets are particularly useful to supply the vaporizable fill in high intensity metal halide discharge lamps. The stick is formed by intermittently loading salt powder into the sized entrance to a channel through which the salt is forced, and compressing the charge against the back end of previously formed salt stick by means of a polished plunger.

Abstract: A screw-in circular fluorescent light unit having a circular light source, a hub having a screw-in base at the axis of the annular light source, and a plurality of symmetrically arranged support spokes extending radially from the hub to the circular light source. The support spokes are positioned and dimensioned so that the unit provides uniform illumination over the surface of a lamp shade.

Abstract: A photoflash lamp array of the FlipFlash type comprising a plurality of flash lamps, a reflector unit, a circuit board, and a flash indicator sheet. The reflector unit is provided with one or more indexing rim protrusions which extend into flash indicator openings in the circuit board for aligning the reflector unit to the circuit board.

Abstract: System for controlling operation of a plurality of gaseous discharge lamps for selectively turning on or off one or more of the lamps and producing desired lumen output of the lamps as needed, to provide for conservation of electrical energy. In the system, each of the discharge lamps is connected to a separate variable impedance ballast device, a control circuit for varying the impedance of each ballast device, and a signal processing circuit connected to each control circuit for operating the same, and a signal transmitting device for transmitting information to each of the signal processing circuits, whereby the latter circuits selectively operate the respective control circuits in response to the information received from the signal transmitting device. In a preferred embodiment, the signal transmitting device is a remote transmitter such as a radio frequency signal device for remote control of the lighting system.

Abstract: A string set construction is disclosed in which the leads from a wire lamp are mechanically joined to wire in the power cord by a plastic sandwich including the insulation on the power cord.

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: Hermetic seal construction for an incandescent lamp is described wherein a composite inlead structure is employed. A pair of inleads connected to the resistive incandescent filament in said lamp are joined at the opposite ends to larger diameter inlead wires in the hermetic seal region. The glass envelope of said lamp utilizes glasses having the following compositional limits in percent by weight:______________________________________ Oxides Weight Percent Range ______________________________________ SiO.sub.2 54-71 Al.sub.2 O.sub.3 12-18 BaO 10-23 CaO 4-8 R.sub.2 O 0-3 ______________________________________except for incidental impurities, residual fluxes, and refining agents. These glasses have improved reboil resistance and can be sealed directly to tungsten or molybdenum metal inleads to provide said direct hermetic seal.

Abstract: Means are provided to repair one or more flash lamps in a linear type photoflash lamp array which have become disconnected from the circuit board member. Specifically, the disconnected in-lead is secured to the sequential firing circuitry located on the circuit board member with an adhesive deposit of an organic polymer and a surface conductive path thereafter established on said adhesive deposit between the in-lead and the adjacent circuitry. The surface conductive path can also be an organic polymer containing an electrically conductive filler.

Abstract: A FlipFlash type of flash array having a body portion and a pair of connectors extending from opposite ends of the body portion and offset from the front face of the body portion, is packaged in a display sheet having an opening through which the front part of the body portion is inserted, the connectors being adjacent to the rear surface of the display sheet. The package includes a member extending over the rear of the flash array.

Abstract: An ornamental structure for decorative string sets utilizing miniature and subminiature lamps is disclosed in which a seamless ornament is securely fastened about the lamp and wires to provide both a decorative and strengthening function.

Abstract: Lowering and hoisting apparatus for high mast luminaires. Luminaire support ring is mounted for movement along a hollow pole by a plurality of hoist cables secured at one end to a transition plate which is located inside the pole and to which is also attached a winch cable operated by a winch at the base of the pole for raising and lowering the support ring. Both the hoist cables and the winch cable are secured to the transition plate by freely rotatable ball bearing devices to prevent the cables from twisting and tangling during the raising and lowering operations.

Abstract: A photoflash unit having one or more flash lamps, and a transparent cover in front of the flash lamps which is provided with elongated light-refractive prisms in front of each flash lamp so as to refract directly radiated light from the lamp when flashed in a more frontward direction and into the area to be illuminated. Prisms may be provided on both sides of the cover.

Abstract: An improved shunt for series connected lamps is disclosed in which two strips of anodized aluminum foil are fastened together around the inner lead wires of the lamp.

Abstract: Flexible sheet reflector for floodlight is supported at its ends by cradle members having parabolic openings into which the reflector ends are inserted, so that the reflector is formed and held in the desired shape by the cradle members, thereby avoiding distortion of the reflector which would otherwise result from the use of screw mountings or other fasteners.

Abstract: Device for securing screw-shell in lamp socket housing. The device comprises a fixed mandrel for holding the terminal tab of the screw-shell which projects through a slot in the housing and a rotatable mandrel on the fixed mandrel for bending the ears adjacent the terminal tab so that the ears engage the socket housing adjacent the slot for retaining the screw-shell in the housing.

Abstract: Reflective coating means are provided to replace the conventional reflector cavities surrounding each photoflash lamp of a multilamp photoflash array. A reflective adhesive coating for this purpose can be applied to each photoflash lamp around a portion of the lamp circumference to reflect the light outwardly in a desired direction. A reflective adhesive coating can also be applied to the circuit board member used with a photoflash lamp array to provide sequential firing of flash lamps as an alternate means to provide the desired light reflection and without need for individual lamp processing in achieving this result. The coating material comprises light reflective particulate solids bonded to the substrate with an adhesive binder.

Abstract: The inner arc tube of some jacketed discharge lamps transmits ultaviolet radiation which is normlly intercepted by the glass outer envelope. To prevent harmful release of such radiation in the event the outer envelope should be shattered, a mechanical disconnect is provided in the interenvelope space comprising a springy conductor fastened to a conductive support and compressed between the outer envelope and an arc tube inlead. Upon fracture of the outer envelope, the conductor straightens out whereupon the circuit is opened and the arc tube is disabled.

Abstract: A practical all plastic headlamp is disclosed comprising, for the lens and reflector, an engineering plastic having a heat distortion temperature in excess of 130.degree. C.