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| Number | Title | Issue Date |
| 5014175 | Luminaire having a reflector containing asymmetrical ridges for distributing light output asymmetrically In this luminaire, there is a dome-shaped reflector having a top, a bottom, and a central axis on which a light source is adapted to be positioned. A metal wall of the reflector has an inner surface extending about the central axis and defining a bottom o... | 05/07/1991 |
| 4987343 | Vehicle headlamp A combined glare and heat shield configuration is disclosed for vehicle headlamp applications. Such composite heat shield member is configured and located inside the headlamp assembly with particular respect to the light source so as to avoid shadowing by... | 01/22/1991 |
| 4987347 | Lamp driver circuit A lamp driver circuit is presented herein for driving a lamp circuit with an AC squarewave voltage at a relatively high frequency. The driver circuit includes a self-oscillating half-bridge circuit having a pair of input terminals connected across a DC vo... | 01/22/1991 |
| 4980809 | Luminaire with automatic voltage disconnect This luminaire comprises a reflector for receiving a lamp, an opening in the reflector through which light from the lamp is reflected, and a closure removably secured over the opening. Within the luminaire is an energizing circuit for the lamp, and connec... | 12/25/1990 |
| 4975624 | Spark gap device particularly suited for a rapid restrike circuit for metal halide lamps A spark gap device is disclosed that is particularly suited for a rapid restrike or starting circuit which is employed in sport stadium lighting applications to start or restrike metal halide lamps that have been subjected to a momentary loss of power. Th... | 12/04/1990 |
| 4968916 | Xenon-metal halide lamp particularly suited for automotive applications having an improved electrode structure A xenon metal halide lamp having an improved electrode structure that is particularly suited for automotive applications is disclosed. The electrode is comprises of a tip portion that is located at one end of a shank with the shank having a filament coile... | 11/06/1990 |
| 4961020 | Sodium vapor lamp for sonic pulse operation An improved high pressure sodium vapor lamp construction is provided for operation on sonic frequency pulses without excessive acoustic noise. The novel jacketed lamp construction employs non-magnetostrictive metal for the frame employed to suspend a cera... | 10/02/1990 |
| 4959762 | Luminaire containment means for lamp rupturing Containment means for a luminaire that captures hot particles created by the unlikely event of a pressurized lamp rupture is disclosed. In one embodiment, the containment means comprises a mesh interposed between the lamp and a refractor of the luminaire ... | 09/25/1990 |
| 4959583 | Reflective lamps having an improved light source mounting arrangement A structure for supporting a light source within an electric lamp having an internal reflective surfaces of reduced dimensions is disclosed. The structure spatially supports the central portion of the light source relative to the reflective surface and co... | 09/25/1990 |
| 4959585 | Electric incandescent lamp and method of manufacture therefor An electric incandescent lamp having an improved coiled refractory metal filament construction is disclosed which enables the lamp to provide a more precise light source. Various lamp and coiled filament configurations are disclosed to include employment ... | 09/25/1990 |
| 4958263 | Centralized lighting system employing a high brightness light source A centralized lighting system particularly suited for aerodynamically styled vehicles is disclosed. The centralized lighting system employes a pressurized lamp preferably of a metal halide having quartz light guides merged into portions of its outer surfa... | 09/18/1990 |
| 4949227 | Upper and lower beam optical switch for line-of-light headlamps using opaque masks A "line-of-light" vehicle lighting system employs a moveable mask to control the beam pattern formed by an plurality of fiber optic light bundles coupled to a single high intensity light source. The lighting system comprises a single high intensity light ... | 08/14/1990 |
| 4943901 | Luminaire with auxiliary reflecting means This luminaire comprises a generally dome-shaped main reflector having a bottom opening and a top opening and a lamp within the main reflector defining a light source located between the top and bottom openings. This main reflector, when mounted in a loca... | 07/24/1990 |
| 4939629 | Compact luminaire including a double-ended lamp This luminaire comprises a metal housing surrounding an internal space and having a mouth at the front side of the housing. Within the housing is a double-ended lamp comprising a tube of transparent material and terminals at opposite ends of the tube. Als... | 07/03/1990 |
| 4937718 | Discharge lamp luminaire A discharge lamp luminaire is disclosed having improved mounting means for electrical circuit components employed in the lamp ballasting circuitry. The improvement is attributable to a particular mounting bracket securing the electrical circuit component ... | 06/26/1990 |
| 4935668 | Metal halide lamp having vacuum shroud for improved performance A metal halide lamp having a vacuum shroud is disclosed. The vacuum shroud substantially eliminates the detrimental catephoresis effects of operating a metal halide lamp from a low frequency alternating current (A.C.) source or direct current (D.C.) sourc... | 06/19/1990 |
| 4931699 | Ballast system including a starting aid for a gaseous discharge lamp This ballast system for a gaseous discharge lamp comprises a reactor coil and core structure forming a magnetic circuit for flux developed by power-frequency current through the coil during lamp operation. The core comprises a leg surrounded by the reacto... | 06/05/1990 |
| 4930049 | Optical multiplexed electrical distribution system particularly suited for vehicles A multiplexed transmission scheme that reduces the complexity of the normal electrical wiring harness of a vehicle is disclosed. The system directly routes electrical excitation to motorize devices and multiplexes the control of the motorized devices alon... | 05/29/1990 |
| 4930051 | Headlamp with sloped lens including beam-spreading flutes This headlamp for a motor vehicle comprises a lens that has a front surface that slopes backwardly from bottom to top of the lens. In localized regions of the lens, there are spread flutes, each comprising alternating ridges and grooves on the back surfac... | 05/29/1990 |
| 4928038 | Power control circuit for discharge lamp and method of operating same Circuits, and methods of using the same, are disclosed for controlling the power supplied to a discharge lamp of the type having a closed inductive loop, such as the resonant ballast circuit for a fluorescent lamp or the inductive ballast loop of a high p... | 05/22/1990 |
| 4918356 | Electric incandescent lamp and method of manufacture therefor An electric incandescent lamp having improved means for both physically positioning and controlling the light output from a filament light source is disclosed. The lamp construction can further employ a reflective film for improved efficiency of lamp oper... | 04/17/1990 |
| 4916364 | Parallel arranged starting circuit for gaseous discharge lamps A starting aid with an autotransformer arranged in a parallel manner with respect to a gaseous discharge lamp is disclosed. The parallel arrangement lowers the current carrying capabilities necessary for the starting aid to handle relative to a serial arr... | 04/10/1990 |
| 4916353 | Incandescent lamp utilizing cylindrical transparent heat mirror Improved support means are provided to center the filament light source of an incandescent lamp within an open-ended transparent cylinder coated with an infrared reflecting film. Such filament mount construction is adapted for use in a tungsten-halogen la... | 04/10/1990 |
| 4904907 | Ballast circuit for metal halide lamp A ballast circuit and method of operating gas discharge lamps are disclosed. The ballast circuit generates a relatively low frequency regulated square-wave current which advantageously provides for operating the gas discharge lamps during their run mode. ... | 02/27/1990 |
| 4903180 | Luminaire with protected prismatic reflector This luminaire comprises a reflector of transparent material having a prismatic outer surface that includes many juxtaposed prisms. Each prism includes two reflecting surfaces meeting at an apex and having portions disposed to effect total internal reflec... | 02/20/1990 |
| 4902943 | Plug-in starting aid A plug-in starting aid for generating high voltage pulses in the ballast circuit of high intensity discharge lamp comprises interconnected electrical components mounted in a frame of insulating material. The frame has three terminals projecting out one si... | 02/20/1990 |
| 4903293 | Programmable system controller for remote devices A programmable system controller is disclosed which is particularly suited for monitoring a correctly responding to user commands initiated by telephone and switch activations. The switch activations may be generated by switches of the two or three wire m... | 02/20/1990 |
| 4900986 | Ballast circuit for starting fluorescent lamps An improved ballast circuit for fluorescent lamps includes an electronic bilateral triggering device and a capacitor connected in series combination across the secondary winding output terminals of a ballasting transformer and in shunt with the fluorescen... | 02/13/1990 |
| 4891555 | Metal vapor discharge lamps Flush and pump flush processes yielding light sources for incandescent and metal vapor discharge lamps are disclosed. The flush and pump flush processes also yield lamps that are particularly suitable for deposition of a reflective coating on its outer su... | 01/02/1990 |
| 4891554 | Arc discharge lamp having improved performance An improved high intensity arc discharge lamp is disclosed having curved projection means included when a bowed shape arc discharge is being closed to preclude molten vitreous material from deforming the internal cavity. In this manner, the arc tube inter... | 01/02/1990 |
| 4891543 | Incandescent lamp having an improved arbor A rough service incandescent lamp having a flexible arbor comprised of a stainless steel member that joins a glass stem press to a filament mounting structure is disclosed. The stainless member is selected to have a coefficient of expansion that both matc... | 01/02/1990 |
