Abstract: Conduits having the electric wiring for supplying power to lighting fixtures in an area classified as hazardous by reason of the presence of potentially explosive dust, vapor or gas have unobstructed interior passages for conveying nonexplosive gas under pressure from outside the hazardous area to each fixture. The pressure of gas in the conduit network can be monitored automatically and control mechanism can be provided to shut off the supply of electric power to the fixtures if the pressure falls below a predetermined pressure or a dangerous over-pressure condition occurs. At each fixture, the nonexplosive gas can be discharged along the face of the transparent fixture lens and/or along an exterior surface of the fixture housing to prevent build-up of potentially explosive agents and to cool the housing.

Abstract: A built-up dome lamp frame, mainly composed of two locating rods and one or more link rods to extend the frame length, wherein one of the locating rods comprises a locating channel on one side and a track channel on the other side; said locating channel being for the fixation of the locating tongue of the other locating rod or the link rod so as to let the track channel of each locating rod be able to connect with a support; said support being fixed to a proper location within the respective track channel so as to let clamping devices match with each adjusting element to fix the whole frame body onto the dome of the car.

Abstract: 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 or components in place. A street lighting luminaire having such mount construction is also disclosed.

Abstract: A lighting system, including a light source having a light bulb and a reflector, has an interference filter applied to a portion of the outer surface of the light bulb. The interference filter has a high transparency for visible light and a high reflectivity for infrared radiation. The area of the light bulb that is permeable to infrared radiation is adjacent to an area of the reflector which is made to be infrared-radiation transmitting.

Abstract: An illuminated safety belt buckle, especially for a motor vehicle, having a buckle housing and a key to actuate a securing device that is disposed in the housing. When an associated buckle tongue is inserted into the insertion slot formed in the housing, the securing device interlocks with the tongue. To provide illumination for the key and the insertion slot, a single light source is disposed in the buckle housing beyond these functional components. A light-conducting path of light-conducting material couples the light source with the key and the insertion slot.

Abstract: An inspection/detection system is for use in forensic applications. The inspection/detection system includes a carrying case which has a cover-lid, a light module and a power supply module. The carrying case is a rectangular box with a closed end and an open end to which the cover-lid is hingedly coupled. The light module is mounted within the carrying case and has an output aperture. The light module may be an argon laser head. The power supply module is disposed within the carrying case and energizes the light module to generate light energy therefrom. The inspection/detection system also includes an optical connector and a shutter assembly. The optical connector is optically coupled to the output aperture. The shutter assembly is optically coupled to the optical connector. The inspection/detection system further includes a flexible optical fiber, a remote control handpiece and a heat exchanger. The flexible optical fiber cable is optically coupled to the optical connector.

Abstract: An apparatus for mounting a bulb in a reflector opening of a headlight includes tongues which are cut-out and bent-out of a portion of the reflector from which an opening is formed through which a bulb to be mounted thereat is inserted. These tongues engage notches in an edge of a base flange of the bulb in a radial direction to prevent rotation thereof. A holding spring which spans over the flange of the bulb base lies under tension against the flange and urges it against an opening frame of the reflector. The holding spring is attached to the reflector at cut outs in edges of the mounting tongues on opposite sides of the opening. Spring tongues from a middle portion of the holding spring impinge on the bulb base flange.

Abstract: A lighting unit, especially for a lighting system is described and is characterized by a carrier section which has a flattened elongate cross-section which terminates in acute angles at both ends, with all functional elements being concentrated in the central part which always has the largest vertical dimension. Changes of the dimensions lead, as a result of the selected layout to no substantial change in the outer appearance, so that powerful systems can also be realized with the same shape without impairing the external appearance.

Abstract: An illuminated panel is provided for use in a display panel system. The illuminated panel includes a frame having opposed peripheral segments which delimit a predetermined area. A cover piece of a material pervious to light rays is mounted on the front side of the frame and overlies the predetermined area. A collapsible housing adjustable between operative and inoperative modes, is mounted on the back side of the frame and includes a pair of foldable wall sections having first portions connected to first opposed peripheral segments of the frame. When the housing is in the operative mode, second portions of the wall sections extend angularly rearwardly from the frame back side and cooperate to form a cavity for accommodating a removable light source. When the housing is in the inoperative mode, the wall sections are disposed in proximate overlying relation with the cover piece.

Abstract: A lighting device comprises a cylindrical light carrier having a plurality of tubular self luminous light sources attached longitudinally along a surface and throughout a major arc of its circumference. In one embodiment the lighting device includes a parabolic reflector.

Abstract: A rectangular-type headlamp having improved air circulation in its interior to prevent fogging of the interior surface of the front lens by deposition of water vapor or an oily film. The front lens is provided with a stepped portion along an upper side edge portion projecting from the rear side thereof and lying in an inclined relation with respect to the upper edge. Thermal stress is relieved by forming the side edges of the front lens in a recessed shape in the region where the front lens is mechanically fastened to the lamp body.

Abstract: 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 surface of the lens. The individual ridges extend in a direction between the top and bottom of the lens and are characterized by having the form of a segment of an inverted, base-up cone. The individual grooves extend in a direction between the top and bottom of the lens and are characterized by having the form of a segment of an upright, base-down cone. The coniform configuration of the individual ridges and grooves serves to lift the edges of the light beam passing therethrough and thereby compensate for the tendency of the beam to droop at its edges as a result of the backward slope of the front surface of the lens.

Abstract: A vehicle lamp device in which the gap provided beside the headlamps is made inconspicuous, and rainwater or dust are prevented from entering the gap. The inventive vehicle lamp device in one embodiment includes a unit movable rectangular headlamp and a rectangular vehicle lamp arranged with a gap therebetween, and, of the confronting side walls of the front lens of at least one of the lamps, at least one has a front edge protruding outwardly so that the gap between the front lenses of the lamps is narrower at the front edge of the side wall.

Abstract: A vehicle front lamp includes a light source upper and lower first curved surfaces made of composite curved surfaces to reflect a light beam from a light source in the left direction and in the right direction, respectively, the upper and lower first curved surfaces being respectively mounted at higher and lower positions than the light source; and upper and lower second curved surfaces for reflecting a light beam reflected from the upper and lower first curved surfaces for making the light beam substantially parallel in the forward direction of the vehicle, the upper and lower second curved surfaces being mounted at the right and left of the light source. The composite curved surfaces of the upper first curved surface are slanted by an angle of 10 to 35 degrees so as to direct the reflected light beam downward; the composite curved surfaces of the lower first curved surface are slanted by an angle of 10 to 35 degrees so as to direct the reflected light beam upward.

Abstract: A disposable flashlight comprising a hollow flexible outer casing having a first end and a second end, a top end cap member for attachment to said first end, the end cap member having an aperture for an electric lamp device and a bottom end cap for attachment to said second end. A battery holding member is placed within the outer casing, the holding member comprising parallel first and second concave battery jackets; a first battery having a positive terminal and a negative terminal, said first battery being placed in the first jacket with its positive terminal proximate to said bottom end cap; a second battery having a positive terminal and a negative terminal, said second battery being placed in said second jacket with its positive terminal proximate to said top end. An electric lamp means is in electrical contact with the batteries and extends through the aperture.

Abstract: A battery powered flashlight includes a case holding a battery, lamp, reflector and an electric circuit including switch means for connecting and disconnecting the battery to selectively energize and turn off the lamp. The flashlight includes a lens supported adjacent an end or side of the case in front of the lamp and reflector forming a rectangular beam of light when the lamp is energized for providing a non-glare illumination of a relatively small rectangular area such as along a sidewalk or a stair tread. The flashlight may also include a second lamp and reflector at an opposite end of the case providing a spotlight and a switch for selecting between the spotlight and the area illuminating beam. The flashlight may include a carrying handle in the form of a bail which acts to operate the switch for initiating the rectangular beam of light or alternatively the spotlight.

Abstract: The reflection surface of the reflector is composed of four segments depending on the low-beam light distribution pattern according to the ECE or SAE standard. For the ECE low-beam light distribution pattern, segment is part of a paraboloid of revolution; segment is a parellipsoid; reflector segment is a parellipsoid; and reflector segment is a general paraboloid. The various segments merge continuously and with smooth transitions with one another. For the SAE low-beam light distribution pattern, the reflector segment is a paraboloid of revolution; the reflector segment is a general paraboloid; the reflector segment is a paraboloid of revolution; and the reflector segment is a general paraboloid; in the SAE low-beam light distribution pattern as well, the reflector segments merge with one another continuously and with smooth transitions.

Abstract: A light bulb is mountable from a rear side of a bowl shaped headlight reflector by extending the light bulb through an opening in an apex of the reflector and rotating it less than 180 degrees. Radially protruding tongues of a plate shaped socket of the light bulb slide under a ring formed element during the mounting. The ring formed element is constructed of spring wire having a polygonal shape. The number of angles of the polygonal-shaped wire is the same as the number of tongues of the socket. The polygonal-shaped wire engages the reflector at its corners, or angles, and the middle of each side thereof is biased to tightly engage a tongue of the socket.

Abstract: A self-illuminated ornamental grill to be mounted between the pair of headlamps of a passenger car, comprising an elongate grill body and an elongate lens which are joined to each other to define a watertight lighting chamber. A pair of fog lamp assemblies or equivalent light sources are mounted in the lighting chamber so as to illuminate the complete length of the lens.

Abstract: A arc discharge headlamp system is disclosed. An arc discharge headlamp system may be formed with a lamp housing including an enclosed reflector, a double ended arc discharge lamp having a two leads at offset ends, enclosed in the reflector. A first lamp support for the front end of the lamp is coupled to the lamp housing, and a first lead connection for the lamp is coupled through a high potential conductor embedded in the lamp housing. The high potential conductor embedded in the lamp housing extends subsurface to a ballast cavity formed in the lamp housing and enclosing a ballast. The ballast is potted in the cavity to protect it. A second lamp lead extends through a second lamp support to the rear of the lamp housing to be connected to the ballast. The lamp capsule, high potential leads, and ballast are all securely enclosed as a single unit with potential leakage between elements, and with the outside prevented.