Abstract: A box-type planar light-source device has incorporated therein a linear light source and is provided with a reflecting surface and a multi-prism sheet. The reflecting surface has such function that a major portion of a light reflected by the reflecting surface is obliquely incident upon the multi-prism sheet. The multi-prism sheet has its inner surface formed with a group of prisms so arranged as to extend in parallel relation to the light source and having such function that the light incident directly or obliquely in reflection outgoes in concentration toward a predetermined direction. Accordingly, so as to eliminate portion by the fact that the light outgoing at an angle separated from the normal direction converges at the dark portion. A dark-portion removing sheet for eliminating a dark portion at a location immediately above the light source is arranged on the side of the front face of the multi-prism sheet.

Abstract: A fixture for a fluorescent lamp includes a diffuser panel. The diffuser panel has a frame and longitudinal elements supported by the frame and spaced apart from one another. At least some of the elements are constructed of a material to allow diffusion of impinging light. Preferred materials are translucent or transparent, such as glass or plastic. The diffuser panel also functions as an air diffuser. Provision of a nozzle in the base of the fixture allows air to flow through the panel by a sucking effect created by high velocity forced air flowing through the nozzle. This results in fixture cleaning and temperature equalization. The fixture is particularly adapted to be mounted in a moving vehicle. For this purpose, the panel is designed to be tamper-resistant and to provide easy maintenance. The diffuser panel, when a latch is opened, may be lowered by rotation to provide access to the lamp and ballast.

Abstract: A box-type planar light-source device has incorporated therein a linear light source and is provided with a reflecting surface and a multi-prism sheet. The reflecting surface has such function that a major portion of a light reflected by the reflecting surface is obliquely incident upon the multi-prism sheet. The multi-prism sheet has its inner surface formed with a group of prisms so arranged as to extend in parallel relation to the light source and having such function that the light incident directly or obliquely in reflection outgoes in concentration toward a predetermined direction. Accordingly, so as to eliminate portion by the fact that the light outgoing at an angle separated from the normal direction converges at the dark portion. A dark-portion removing sheet for eliminating a dark portion at a location immediately above the light source is arranged on the side of the front face of the multi-prism sheet.

Abstract: A method of generating a light source suitable for television studios or video production facilities with high speed flourescent lighting devices.

Abstract: An elongated cornice lighting fixture in a public transit vehicle coupled with an advertising display panel is mounted above the windows on each side of the vehicle. Light from incandescent bulbs in each fixture is controlled by sheets of reflective optical film to direct the light to the seating area below each fixture and to the display panel associated with the opposite fixture with only minimal illumination of the vehicle floor and windows.

Abstract: A portable work light including an elongate fluorescent bulb for emitting light when powered from an electrical current source, an elongate, transparent, relatively thick protective shield, a shock absorber within the shield mounting the bulb within the shield in spaced-apart relation thereto against breakage of the bulb from shock or impact. In addition, an elongate, transparent, relatively thin disposable scuff guard is positioned over the shield to protect the shield from scratching and scuffing and which can be replaced when scratched and scuffed to restore full light transmission to the work light.

Abstract: A lighting fixture has parabolic, asymmetric, adjustable reflectors longitudinally disposed in alignment with the lamps therein. The reflector is attached to the lighting fixture by a fastener and dimpled end plate. Dimpled end plate mounts to the end of reflector, which includes a recessed plate thereon having matching recesses for receiving the dimples. By rotating end plate and reflector with respect to the recessed plate, the orientation of the reflector may be circumferentially varied.

Abstract: A double filamented lamp with one filament being a back up for the other filament may be formed with two internal capsules enclosed in a single exterior sheath. Each filament is securely positioned away from, and protected from the activity of the other filament. By securely coupling one capsule to the sheath, and the second capsule to the lamp base, both capsules are accurately positioned, and do not vibrate in the exterior sheath.

Abstract: A fixture for a fluorescent lamp includes a diffuser panel. The diffuser panel has a frame and longitudinal elements supported by the frame and spaced apart from one another. At least some of the elements are constructed of a material to allow diffusion of impinging light. Preferred materials are translucent or transparent, such as glass or plastic. The diffuser panel also functions as an air diffuser. Provision of a nozzle in the base of the fixture allows air to flow through the panel by a sucking effect created by high velocity forced air flowing through the nozzle. This results in fixture cleaning and temperature equalization. The fixture is particularly adapted to be mounted in a moving vehicle. For this purpose, the panel is designed to be tamper-resistant and to provide easy maintenance. The diffuser panel, when a latch is opened, may be lowered by rotation to provide access to the lamp and ballast.

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 apparatus for enhancing the beauty of marble by back lighting the marble to thereby cause the majority of the marble to be illuminated while the veins in the marble block the light and thereby stand out from the marble. A tower structure is comprised of marble walls which preferably are no thicker than 1/4 to 1/2 inch and are light colored such as white or light grey. The tower is hollow and further comprises a lighting fixture within it to provide of source of light to back light the rear interior marble walls, and thereby cause the light to shine through the marble surrounding the veins and enhance the beauty of the veins within the marble. The preferred source of lighting is fluorescent.

Abstract: A stackable louver assembly for light fixtures which can be made of a high strength polycarbonate light transmitting plastic material and which has a sleeve and louver flange molded in one piece so that the sleeve will not be lost or discarded at the job site. The louver assembly becomes self-enclosed. The louver assemblies are made so they can be stacked one on top of the other and fastened with tie rods at desired locations. The sleeve that supports the louver flange is made with a surface that is generally parallel to the longitudinal axis of the assembly, and can be provided with v-type grooves to provide refraction of the light emanating from an interior lamp. The grooves can be molded into the plastic with no increase in cost, and will reduce glare and improve overall performance of the fixture. Likewise, the louver flanges may have surfaces that are provided with refraction grooves, as well.

Abstract: The present invention relates to the field of luminaires, and more specifically relates to the field of luminaires employing means to provide even, glare-free illumination.

Abstract: A freestanding luminaire includes a floor-supported frame having a base adapted to rest on the floor, an overhead beam arrangement and an upright member connected at its lower end to the base and at its upper end to the beam arrangement so as to support it in a cantilevered fashion over a work surface. The beam arrangement includes a central longitudinally extending beam and a plurality of cross beams attached to the central beam at spaced locations therealong and extending in transverse relationship to the longitudinal extent of the central beam. The central beam is attached at one end to the upper end of the upright member of the frame and extends in transverse relationship outwardly therefrom. The luminaire also includes a plurality of lamps being preferably of the type which use fluorescent tubes, mounted to and extending between the cross beams.

Abstract: A lamp unit includes a pair of support members facing each other and three baseless fluorescent lamps supported parallel to one another by the support members. Each support member has three support recesses located at predetermined intervals. One end of each lamp is fixedly inserted into each corresponding support recess of one of the support member and the other end to each corresponding support recess of the other support member. Each lamp has a radiation window extending in the axial direction thereof. The lamps are positioned so that light beams emitted from the windows thereof intersect on a desired straight line.

Abstract: An elongated indirect luminaire is provided with two separate lens elements in the form of a primary trough-shaped lens cover supported over the luminaire's light source and at least one secondary lens strip supported laterally of the primary lens cover. A prismatic surface is formed on the lens cover for directing a portion of the available source light to the secondary lens strip; the secondary lens in turn has a prismatic surface designed for redirecting the light in a desired controlled fashion. The laterally placed secondary lens provides added control to the light distribution in the lateral regions of the luminaire near the luminaire's operative horizontal plane, and, in the illustrated embodiment, is designed to slightly boost the light in the lateral regions near the horizontal plane in a manner that provides improved control over the luminance of the secondary lens at viewing angles near the horizontal plane of the fixture.

Abstract: A ceiling-mounted, recessed strip lighting fixture (10) is disclosed for mass transit vehicles. An uninterrupted lens module (18) extends throughout the length of two or more spaced apart lamp housings (14a,14b) which are recessed into the ceiling (142,142'). The lens module comprises a central lens section (92) and a pair of oppositely disposed side lens sections (94,94') and is surface-mounted, relative to the ceiling, beneath the lamp housing. The central lens section is a light diffuser for distributing light along the entire length of the lens module. The side lens sections comprise prismatic lens elements for directing the light laterally of the lens module. The side lens sections support the central lens section in a sliding interlocking connection. The central diffuser section may be made up of plural parts which are disposed in end-to-end abutting engagement.

Abstract: A warning light assembly suitable for vehicle roof mounting is built around an I-beam structural member and includes lens elements which engage and are readily positionable on the beam so as to span the flanges at both sides thereof. The light assembly may include lights having a wide angle radiation pattern which are comprised of intersecting linear parabolic reflector sections and flash tubes formed to follow the contour of the intersecting linear focal points, the tubes being supports with their axes coincident with the reflector focal points.

Abstract: This invention is related to a "non-neon light" which may be directly, manually and freely bent and folded for linear and arched installation for any suitably prepared advertising decoration or similar lamp ornament in a plane figure or dimensional formative article in optional line with the fondness and purpose of installer or user, and consists of a bendable and foldable bulb-holding bar and a set of connecting device wherein the bendable and foldable bulb-holding bar comprises a main bulb-holding bar body made of soft or semi-soft PVC or similar plastic through drawing by a molding/extruding machine, each one electric wire with a suitable number of ply on the left and right sides of this bar, and each one corresponding fillister with a suitable depth and width on the upper and lower sides thereof, a plurality of conductive plugs connected with several or a plurality of small bulbs spaced with suitable pitch in series, and the foremost and terminal bulbs of each set of small bulbs connected with the two ele

Abstract: A lighted display panel system including apparatus for distributing fluorescent light through a lens having a transparency thereon. The apparatus comprises an open-sided housing having a cavity therein for receiving a plurality of fluorescent bulbs in spaced proximity to an undulant reflector. The undulant reflector is located within the housing cavity and specifically designed to provide an optimal Kelvin rating as the fluorescent light from the bulbs is reflected therefrom and passes through the lens covering the housing cavity. The apparatus is incorporated into the lighted display system by a plurality of connection bars, connection rods, and an electrical buss bar. A method of assembling the lighted display panel system is also disclosed.

Abstract: A lighting fixture in the form of a support frame having top and bottom walls that are interconnected with end support pieces and that have open sides through which the light is dispersed. A series of three elongated fluorescent lamps are mounted in the support frame supported between end support pieces, a translucent cover in two pieces is disposed about the support frame over the respective open sides. Mirrors are disposed in the support frame including a top mirror on the frame top wall and the bottom mirror on the frame bottom wall. The combination of properly positioned lamps and mirrors provides light output that is uniformly dispersed through the covers. In one embodiment, an exit sign is mounted under the fixture and a slot is provided for directing a light path directly to the side.

Abstract: A lighting fixture having a dish-shaped chassis which houses lighting elements including tube sockets, transformers, and ancillary electrical components. The chassis is sleeved within a protective, unitary, shatter-proof plastic closure shell having opaque, marginally disposed panel sections and an opaque circumscribing wall assembly integrally formed with and substending a light-transmitting diffuser lens bounded by a transversely extending, integrally-formed light-transmitting frame. The opaque panel sections shield the chassis-housed tube sockets and transformers from view exteriorly of the fixture.

Abstract: An improved barrier light assembly is provided wherein a lens assembly composed of a pair of mating halves is secured to the upper portion of a base assembly by a threaded flanged collet. A peripheral outwardly extending integral neck of the lens assembly extends into the upper portion, and the collet threadably engages the neck. A pair of screw flights are employed which permits use of identical mating halves.

Abstract: A lighting fixture which comprises a light reflecting fixture case having a transparent wall disposed next to an opening to provide light outflow, a light source disposed in the fixture case, and a diffuser wall covering the light outflow providing opening of the case and which is attached to the transparent wall and which reaches to at least the outer face of the transparent case wall. Thus the face of the diffuser wall can completely be used as light providing surface. Preferably, the transparent case wall is covered with a thin layer of reflecting and opaque material.

Abstract: An artificial light source arrangement includes a tubular light source whose horizontal light distribution curve takes on a substantial circle, a plurality of elongated linear lenses arranged parallel with the light source, and a plurality of photoconductors, each having its light-receiving end disposed along the focus position of each lens. Lenses may be arranged in coaxial relation to the light source, and the photoconductors may then have their light-receiving ends formed at the focus position of the lenses.

Abstract: A vandal resistant security light fixture having a housing and a light which is serviceable and removable from outside the room in which it is installed. The housing has at least one surface which faces into the room and is open at the back to permit servicing or replacement of the light assembly without having to enter the room. The fixture is vandal resistant and is particularly useful in prison cells and may be provided with one or more vandal resistant switches and vandal resistant electrical receptacles.

Abstract: An explosion-proof fluorescent light fixture for use in hazardous environments, comprising a pair of fluorescent lamps each shielded by a protective globe and electrical contact containing end connectors at the opposed ends of the lamps and globes. The end connectors and globes form integral one-piece self-contained units and, in case of breakage or a globe, the entire unit of globe and end connectors can be easily detached and replaced simply the unloosening or re-fastening of bolts which normally secure the end connectors to the light fixture. The end connectors are provided with detachable end caps enabling a burned-out tube to be withdrawn and replaced.

Abstract: This invention concerns an electronic flashlight for ophthalmological examination instruments.

Abstract: A light-gathering device for transmitting through fiber optic bundles, the light emitted by an electronic flash along with the light from a continuous light source so that relatively small objects may be lit so as to photograph them. A first housing (8) is provided, designed to receive a flash tube (1) of an electronic flash unit, and a "model"(3) emitting continuous light, the first housing (8) being enclosed within a second housing in which there are several openings for inserting the ends of fiber optic bundles (2) whose opposite ends are used for illuminating the object to be photographed. Manual shutters (5, 6, 7) are provided for varying the light intensity from the flash tube to the fiber optics (2). This light gathering device is suitable for taking top-quality color photographs which have the desired lighting effects.

Abstract: A connection system comprising a variety of metal connectors, a plurality of illuminated modules insertable into the connectors, and electrical leads hidden within the connectors to electrically join the modules in series relationship, and a step-up transformer for supplying the voltage needed to energize the plurality of modules. Each connector has a hollow body adapted to receive at least one illuminated module. Each illuminated module includes a rigid, transparent plastic sleeve with an annular collar at each end of the sleeve; a gas filled tube is retained in the sleeve by the collars. A foot with a mounting flange is operatively associated with some of the connectors to firmly support an assembled plurality of illuminated modules. The connectors and illuminated modules can be assembled into diverse configurations for applications previously unsuited for gas filled tubes, such as neon.

Abstract: A long, linear indirect lighting fixture of a relatively small cross-sectional dimension which is mounted above eye level is comprised of lamps secured within an elongated housing, and a reflector and side lenses which direct and refract the greatest portion of luminous flux from the lamps above the horizontal plane of the fixture, yet a small portion of the luminous flux below but near the horizontal plane. The portion of light directed below but near the horizontal plane, which is controlled by, among other things, the relative placement of the lens and lamps, is great enough for an individual to have a perception of seeing a light source but small enough to avoid discomfort produced by glare.

Abstract: A light fixture is provided with a plurality of reflectors, each reflector is adjustable to a different position whereby the light fixture may provide plural paths of light. The light fixture has two end plates, a support bar, and a light tube. Individual adjustable reflectors are carried by the support bar and pass around the light tube. Depending upon the position of the reflector, the single light tube may provide lumination in a number of different areas.

Abstract: Improved edge lighted devices incorporate one or more light transmitting body assemblies of unique design, resulting in superior performance from both brightness and energy efficiency standpoints. Techniques for obtaining advantageous light transmitting body surface treatment are disclosed. Also disclosed are arrangements for reducing the amount of material utilized for the light transmitting body.

Abstract: A light source consisting of a straight tube fluorescent lamp is mounted almost in parallel with a desk work surface to be illuminated. A housing enclosing this light source is mounted, and this housing is fixed on the surface to be illuminated by means of two support members. The housing has an opening section at its lower position, and a light controller which is formed of two kinds of prism plates is fitted in the opening. The light emitted from the light source is refracted by the prism plates. These beams of light are converted by the above light controller to two types of light components which run almost in parallel with the first and second directions. One of the beams of light falls from the right top in front of the person at desk to the illuminated surface region in proximity to the left hand of the person at desk, and the other beams of light fall from the left top in front of the person at desk to the illuminated surface region in proximity to the right hand of the person at desk.

Abstract: In an apparatus capable of duplicating jacketed and unjacketed microfiche, a bank of clear cylindrical lenses is provided, each lens being divided into segments by a series of substantially opaque baffles. The lenses are used with a corresponding bank of aperture lamps, and are disposed between the lamps and microfiche to provide relatively uniform, collimated light upon an image plane, the side of the lenses closest to the microfiche being flattened, and the baffles having an index of refraction lower than that of the clear segments of the lens.

Abstract: An improved light fixture comprising a housing adapted for tower or pole top mounting and having preferably stacked upper and lower lamp compartments. One reflector in each compartment includes a segment that is located partly behind and partly over a symmetrically positioned lamp included therein so as to reflect light therefrom downwardly and outwardly through a window in a side wall opposite to the reflector. Another reflector similarly located reflects light through a second window in an opposite side wall. Windows in the other two side walls also receive light emanations from the lamp. The axis to the lamp in each compartment is substantially horizontal and is skewed with respect to the side wall windows. The lamp in one compartment is preferably complementarily positioned with respect to the lamp in the other compartment.

Abstract: In a recessed lighting fixture intended to be laid onto horizontal flanges of inverted T-shaped rails of a grid-type ceiling, the rails having a stem with a bulb defining shoulders below the upper edge of the stem, the fixture having a housing with metal end plates, a hook is formed integrally with one of the end plates. The hook extends across and embraces the bulb. The hook is either formed with a nose projecting in a direction toward the end plate and beneath a shoulder defined by the bulb, or a tab, integral with the end plate, is provided that has a free upper edge projecting from the end plate toward and beneath a shoulder facing the end plate.

Abstract: An angle iron forms two sides of a right isosceles triangular housing. These sides are each apertured and the apertures are provided with metal-framed lens plates which bolt onto the housing sides. Preferably, in one instance the lens material is mounted in the plate for ease of access to the interior of the housing and in the other instance the lens is mounted in the aperture and retained by the frame plate. A fluorescent lamp tube assembly is received inside the housing for providing illumination through both lenses. Access thereto is via removal of a metal-framed lens plate. The housing has mounting elements which permit a user to flush mount the housed light source, e.g. on a mining machine.

Abstract: An illuminated, portable floor comprising a plurality of releasably, lockable panels having an array of illuminable members disposed in a desired design pattern in the upper surface of each panel, male and female mechanical coupling members disposed around the periphery of each panel for mechanically locking the panels in a side-by-side contiguous relationship, electrical male and female connectors mounted within selected locations along said mechanical coupling members of particular panels for electrically connecting the illuminable members of selected adjacent panels, a low voltage electrical power source, and an electrical circuit network connecting the power supply, the electrical connectors, and the illuminable members together. As the floor is assembled, the joinder of side-by-side panel edges effects both mechanical and electrical coupling simultaneously.

Abstract: A lighting system wherein a task-oriented light source is supplemented by the provision of a baffle so located in relation to the positions of the source, the task and the observer as to block out or modify, in whole or in part, the light reaching the task at angles such as would produce veiling reflections. The baffle may be plastic or glass with polarizing characteristics and may be flat or curved; it also may be fixed or adjustable.

Abstract: A tubular incandescent lamp which comprises an elongate transparent envelope; and a plurality of small lamps linearly arranged and extending lengthwise through the envelope, each of said small lamps containing a helically coiled filament and wherein the difference between the inner diameter of the envelope and the outer diameter of the respective lamps is chosen to be 2 mm or less.

Abstract: Indoor lighting fixture provides semi-indirect symmetrical light distribution. The fixture comprises a central support tube attached to the ceiling at its upper end and having a high intensity gaseous discharge lamp at its lower end projecting into a box-like housing having a semi-transparent variable transmission lens on its bottom and an interior reflector extending around the lamp for reflecting light rays upwardly toward the ceiling. Vertically spaced louvers arranged encircling the upper portion of the lamp serve to shield the lamp from direct view of the room occupants to avoid glare.

Abstract: A street lighting luminaire comprising an elongated semi-cylindrical reflector of parabolic cross-section having opposite ends, and paralumens arranged to obtain a luminous beam whose divergent with respect to a plane normal to said axis varies from one to the other end of said reflector to obtain on the street a lightened area of rectangular cross-section.

Abstract: A work area lighting system is provided including a housing containing a linear light source therein and having an open bottom end. A refractor comprising a pair of refractor plate members closes the open bottom end. The refractor includes a first member having a plurality of spaced prisms extending parallel to the light source and a second having a plurality of spaced prisms extending perpendicular to the light source. The second member underlies the first member and both are co-extensive in length with the light source. The refractor plates each have light incident and light emergent surfaces and both plates have their prisms on the light incident surface.

Abstract: A modular housing assembly for housing a vehicle warning light system and intended for mounting across the roof of a police car or other vehicle on which warning lights are required. The housing comprises a plurality of transparent plastic panels of modular construction, there being provided a plurality of front modular panel sections interconnected in side-by-side relation and a plurality of rear modular panel sections interconnected in side-by-side relation, the front and rear panel sections being connected to one another and to a common base member.

Abstract: A light projector for providing uniform surface area illumination of the type utilized in motion picture studios or the like, employs a housing having a reflector arranged at one end and a Fresnel lens arranged at the other end. At least two linear light sources are located in the interior of the projector at right angles to the optical axis and are electrically connected to a three-phase energization circuit. The lamps are arranged in a star-shaped pattern, relative one to another, and each is a single, self-operating, interchangeable unit, such that by replacing only one of the lamps in the light projector the color temperature of the illumination may be maintained approximately at the desired value.

Abstract: A portable light having a U-shaped body and an elongated reflector supported on the body providing a space for batteries between the reflector and the body. Two lamps are supported on the reflector providing a flood light and a lens is supported on the body over the reflector and the lamps. Two cup-shaped end caps are supported on the ends of the light and one end cap has a frusto-conical shaped reflector integrally attached to it, and a lens closes the end of the cap having the reflector in it, and a lamp is supported on the reflector under the lens providing a spot light.

Abstract: An overhead lighting fixture with the housing having an open bottom, a resilient hinge pivotally fastening a first side of the light transmitting panel to a first side of the housing adjacent the open bottom of the housing, and a latch assembly for detachably securing a second side of the light transmitting panel to a second side of the housing adjacent its open bottom. The second side of the housing is an elongated extruded side panel member having a light housing web portion and a latch web portion that lies in a plane approximately 90.degree. thereto. The latch member has a J-shaped configuration with a head, a body, and a foot. The head of the latch member has a circular lateral cross-section that is matingly received in a groove formed in the latch web portion. This structure permits the latch member to be pivoted laterally into and out of engagement with a lip extending along the length of the light transmitting panel that rests in the curved hook surface of the J-shaped latch member.

Abstract: A luminaire lens is provided with a prism arrangement which emits light in two beams. A fluorescent tube fixture is utilized with the lens and approximately the same amount of light comes from the 0.degree. to 30.degree. zone of candlepower distribution and the 30.degree. to 60.degree. zone of candlepower distribution, with very little light emitted from the 60.degree. to 90.degree. zone of candlepower distribution. A second lens insert element is provided within the primary luminaire lens to mask the image of the fluorescent tube.

Abstract: A desk level work area and its immediate environment are lighted with reduced or eliminated glare and veiling reflections from the task, by a lighting fixture mounted between seated eye height and standing eye height. The lighting fixture comprises an elongated housing, a light source within the housing providing illumination longitudinally of the housing, and a refractor plate capable of distributing luminous flux from the light source in a bat wing configuration. The plate is mounted on the housing such that the bat wing configuration of the luminous flux is directed essentially to the right and left of a viewer transversely facing the light source.