Abstract: Electric lamps of the type embodying a lampshade, particularly a combination louvre and baffle which diffuses the electric light through the sides of the lampshade. The louvre is positioned above the electric light fixtures, so as to reflect and diffuse light radiating upwardly and the baffle is positioned at the side of the electric light source so as to diffuse laterally light through the lampshade.

Abstract: A lamp shade including a plurality of light deflectors. The light deflectors are mounted so as to be independently moveable with respect to the frame and one another. Most preferably the lamp shade is defined by two or more spaced arrays of light deflectors. In one embodiment the light deflectors are mounted end to end to allow vertical variation in light intensity and direction. In another embodiment the light deflectors are both horizontally and vertically disposed to increase versatility in both appearance and lighting effect. Thus, the lamp shade advantageously allows the light to be directed in accordance with the particular area in which the light fixture is placed, both to shield the user's eyes and to direct light where it is most needed.

Abstract: A lamp shade including a plurality of light deflecting elements. The light deflecting elements are rotatably mounted so as to be independently rotated with respect to the frame and one another. In one embodiment the light deflecting elements are mounted end to end to allow vertical variation in light intensity and direction. In another embodiment the light deflecting elements are both horizontally and vertically disposed to increase versatility in both appearance and lighting effect. Thus, the lamp shade which advantageously allows the light to be directed in accordance with the particular area in which the light fixture is placed, both to shield the user's eyes and to direct light where it is most needed.

Abstract: A louver/lens assembly for placement in the light-emitting opening of a fluorescent light luminaire has a louver assembly mounted in the light-emitting opening of the luminaire. On top of the louver assembly, and between it and the fluorescent tubes, a prism lens, typically formed from a sheet of extruded transparent acrylic material, is placed. The lens sheet is flat on the surface facing the fluorescent tubes in the fixture, and has parallel longitudinal prisms formed in the surface overlying the louver assembly. The prisms are selected to direct light rays passing through the lens assembly downwardly through the openings between the longitudinal and transverse louvers of the louver assembly.

Abstract: An illuminated electrical part comprises a case, an indicator panel attached to the open front end of the case, a housing attached to the case so as to define an illuminating space behind the indicator panel, and an illuminating device comprising a light source disposed behind the indicator panel and mounted on the housing, and a cover formed of a highly heat-conductive material, fixed to the housing so as to cover the light source and provided with light control slits in its top wall extending between the indicator panel and the light source and with light control apertures in its opposite side walls. The numbers, shape and arrangement of the light control sliuts and the light control apertures are determined selectively so that the entire area of the indicator panel is illuminated uniformly by light emitted by the light source, scattered by the inner surface of the housing and shed through the light control slits and the light control apertures.

Abstract: A lighting system for room lighting includes a light grid comprised of intersecting first and second sets of parallel elongated parabolic louvers. The louvers of at least one of the first or second sets are angularly oriented to nadir and spaced apart to confine light passing downwardly therethrough to an asymmetrical candlepower distribution curve. One quadrant of the curve, termed a "wall washing quadrant" is on one side of the curve and a "low direct glare quadrant" is oriented to an opposite side of the curve. The light and light grid are placed adjacent the wall such that the wall washing quadrant is oriented toward the wall to illuminate the wall and the low direct glare distribution quadrant is oriented toward the interior of the room. The wall washing quadrant eliminates the "cave effect" at the juncture of the adjacent wall and the ceiling while the low direct glare quadrant provides desired illumination directed into the adjacent room.

Abstract: The anti-glare covering for illuminate switch or indicator of the invention is formed of a covering member shaped from a transparent synthetic resin and a microlouver-type anti-glare sheet melt-bonded to the lower surface of the covering member. This structure is different from conventional anti-glare coverings for illuminate switch or indicator in which the covering member has a top opening and the microlouver-type anti-glare sheet covers the opening. Thus, the anti-glare covering of the invention is provided with improved visiblity and rigidity and is easy to maintain beautiful appearance. The visibility of the illuminate switch or indicator is further improved by providing a thin light-transmitting metallizing layer on the upper surface of the covering member at the top portion.

Abstract: An illuminating system for projecting light upwardly from a light chamber without being directly visible to nearby observers. The system has a cavity disposed above the light chamber forming a vertical passageway for light. The cavity has a light blocker in the passageway for restricting the upward passage of light such that the restricted light beam passing through the cavity does not substantially impinge upon the inner surface of the cavity walls near their upper ends.

Abstract: Interior lighting fixtures having specific shielding conditions. For lighting fixtures having a center-symmetrical light exit area, a structural pattern for a grid inserted into the light exit opening of the lighting fixture is provided which meets the specific shielding conditions of the BAP picture screen workstation condition and the like and which masks the light from the lighting fixture as little as possible. This structural pattern is based on a subdivision of the grid into segments of identical size having self-contained framing cells whose diagonal or whose largest, straight side or, respectively, a chord of the largest, arcuate side does not exceed a value 2 Ro of the diameter of the center grid cell. The size of the center grid cell thereby results from the height of lamellae exhibiting a double-parabolic cross-section while preserving the desired shielding condition for this center grid cell.

Abstract: A light shielding screen structure comprising a first light transmissible substrate, a second light transmissible substrate and, interposed therebetween, a light shielding screen comprising a perforated structure comprising a plurality of fine partition walls and apertures defined by said partition walls, said first and second light transmissible substrates being connected respectively to both end surfaces of the parition walls of the light shielding screen through a photocured adhesive layer. The screen structure exhibits a peeling strength of 50 g/cm or more at the connection between each partition wall and each light transmissible substrate and includes a fillet of not greater than 5 .mu.m in width in each aperture at a corner portion defined by the inner wall of each aperture and the inner surface of each light transmissible substrate.

Abstract: A glare-free illuminating system comprises a light chamber and proximate, light conducting structures extending vertically, containing a light passageway. Light-blocking means restrict the upward passage of light. The restricted light beams have smaller horizontal dimensions than the light passageways, which have non-reflective interior walls, so that light passing therethrough produce neither direct glare nor glow reflected by the apparatus walls. Light is only indirectly visible by its reflections from the illuminated object.

Abstract: A louver system for use with louver supports having inwardly opening perimetral end and side channel defining a rectangular louver space and adapted to receive the end and side edges of the louver. The louvers are provided with integrally molded end and side flanges, which may be of either of two preselected lengths, illustratively identified as short flanges and long flanges. The end flanges may have a length differing from the side flanges in the louver. Each of the short and long flanges may have different lengths depending on whether the cells of the louver are small or large. By providing the small cell louvers with either of the short or long flanges and the large cell louvers with either of the short or long flanges, a majority of standard louver mounting systems may be accommodated with only the four configurations.

Abstract: A louver construction comprising a grid formed of cubes molded unitarily with a flange extending around the periphery of the grid. The cubes include a border row making up the periphery of the grid. The cubes in the border row have different dimensions than those inside them in the grid. The flange may vary in width but the outside dimensions of the louver remain the same. As a result, the same size louver grids will fit different size light box openings.

Abstract: A light fixture (10) including a bulb/lens assembly (12), a hollow post (14) and a ground stake (16). An assembly ring (18) having inner and outer "fingers" (104 and 106, respectively) securely connects the bulb/lens assembly (12) to the post (14). Bulb/lens assembly (12) includes a lens (28) which carries a plurality of louvers (40, 42 and 44). Some of the louvers include legs (46, 50) and slots (60, 62) so that the distance between the louvers can be adjusted to vary the appearance of light fixture (10) and the amount of light produced thereby.

Abstract: A light-shielding screen device comprising a first light transmissible substrate, a second light transmissible substrate and an intermediate layer sandwiched therebetween, the intermediate layer comprising at least one light-shielding screen portion located in the middle area of the intermediate layer and a light non-transmissible retaining portion located at least in a portion of the remaining area of the intermediate layer, the portion of the remaining area including the entire outermost peripheral area of the intermediate layer. The light non-transmissible retaining portion of the intermediate layer of the present light-shielding screen device securely retains on its both sides the first and second light transmissible substrates, respectively.

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: A troffer extension attachable to the walls of a lighting troffer, and with portions of a ceiling to raise the troffer relative to the ceiling, and having extension members, upper devices on one end of the members for engaging the troffer, and, lower devices on the other ends of the members for engaging the ceiling.

Abstract: An antiglare panel is formed of a series of identical inter-locked strips. Each of the strips is formed of a series of "W" shapes having two connected short legs formed at right angles to each other and two long legs extending at right angles from a respective short leg to define the "W" shape. The long legs of adjacent "W's" are formed at right angles to define a projecting right angle. The projecting right angles of one strip are positioned within the recessed right angles of an adjacent strip so that the interior surface of the short legs overlie a portion of the exterior surface of the long legs to provide contacting surfaces. Such contacting surfaces may be secured together.In a preferred embodiment, the strips are formed of tinned steel strip, and the assembled strips are heated after assembly to a temperature above the melting point of the tin coating to provide a metal bond at all contacting surfaces.

Abstract: A grid which produces a vaultlike appearance on one side comprises a first series of parallel plates extending in one direction and a second series of parallel plates extending in the direction to intersect the first series of plates. At least one of the series of plates is generally concave on the one side; when only one series of plates is generally concave on the one side a tunnel effect is produced with the side edges generally concave, but when both series of plates are generally concave on the one side, a dome appearance is produced. The grid may be used as a ceiling grid and illuminated, if desired, or as an upright partition or divider placed on one edge. The opposite edges of the plates may be equidistant, including any deviations from a curve on which the edges may be laid out. A series of scallops, concave on the one side and convex on the opposite side of each plate may have the length corresponding to the distance between intersecting plates.

Abstract: An improved optical system for the light point on an illuminated signal or display device having one or more light points. The system comprises one or more light deflectors optically coupled with the light source of the light point and focussing the light passing through the effective aperture of the deflectors towards a focal point or line, respectively, and one or more light shields arranged in the light path and provided with an aperture in the focal point or line whereas a plurality of the deflectors with the corresponding light shields may be arranged in the rows and columns of a display board. The mantle of the light shield frames a hollow in a manner that its mouth is facing the light deflectors and the mantle is under a bevel narrowing towards the aperture of the light shield and the mantle is arranged parallel to and encircling rays departing from the periphery of the effective aperture of the light deflectors and converging into the focal point or line.

Abstract: A light box having one or more fluorescent light source tubes provided with light diffusing and mixing members of tubular form for modifying the light emitted by the fluorescent light tubes to provide a substantially uniformly illuminated backlighted work surface for use in tracing, stripping art work, and viewing color slides, photo negatives, and X-rays. The light box includes internal coated reflective surfaces on bottom and side walls. The light diffusing and mixing member includes light reflective interior and exterior coatings, shaped end portions and in one example perforations providing light transmitting openings. A light diffusing and mixing member of selected light translucent material having shaped end portions and arranged in accordance with the intensity of light emanating from the tubular fluorescent light source.

Abstract: Two nested downwardly diverging frustoconical lamp shades are supported at their upper ends by a base which also supports a lamp bulb. The shades have openings therein which, when aligned by adjustment of one of the shades, passes a beam of light from the bulb to a reading or like area. The intensity of illumination can be controlled by changing the extent of overlapping of the openings. Shade elements extend across the lower ends of the shades and have openings therein. One of the shade elements is adjustable relative to the other to move the openings therein in and out of register with the openings in the other element whereby to vary the intensity of illumination of light projected downwardly by the lamp bulb.

Abstract: A task lighting apparatus produces glare-free illumination of a work area. The apparatus includes a light source, a reflector and light-directing louvers to provide a controlled light pattern of high illumination levels and high efficiency. The apparatus has a compact size and shape which enables it to be used in confined quarters.

Abstract: A cover plate for vehicle lights, especially taillights of automotive vehicles, which includes an outwardly oriented surface of the cover plate which, as viewed in a vertical section, is fashioned of a meander shape. At least a part of the horizontal lying areas of the cover plate are made to be at least extensively opaque by, for example, a dark surface coating or dark inserts which are integrally cast or injection molded into the horizontal areas of the cover plate.

Abstract: To provide for uniform output throughout the area of the light source, particularly to provide a background illuminating surface for liquid crystal display, an especially adapted for automotive application, the light-emitting surface is formed as a wedge-shaped body of transparent material, such as Plexiglas, with light being coupled thereinto at the wider side surface, the bottom surface of the wedge-shaped body having, preferably, a reflective, light dispersing layer or coating applied thereto, for example in form of a white pigmented lacquer, white paper, a ceramic plate, or the like; an intermediate layer of light-transmissive material having an index of refraction less than the index of refraction of the body may be interposed between the surface of the body and the reflective coating of layer. The top surface of the body can be matte, for example formed by microgrooves extending transversely to the plane of the side surface through which light is coupled into the wedge-shaped body.

Abstract: A lighting panel trim element for attachment to the outer marginal edges of a lighting panel is disclosed as having a throat section for receiving the top, side and bottom marginal edges of the lighting panel, a horizontal wall section for mounting the lighting panel relative to a lighting fixture, and means for positively securing the lighting panel within the throat section of the lighting panel trim element.

Abstract: A method of altering the photometric output and distribution of a light beam produced by a lamp having a fluted sealed beam lamp lens cover, the light beam having a certain beam shape which, in the absence of the present invention, does not conform to the photometric specifications for auxiliary low beam automobile head lamps; the latter specifications require the lamps to have specific maximum and minimum candela(s) output at various photometric points within the beam pattern.Specific areas of certain flutes molded into the lens cover of a non-conforming sealed beam lamp are partially or totally covered with an opaque material or obstructed by a shield to restrict the candela output of unwanted light at various photometric points within the beam pattern, and thus permit the total beam pattern of the treated lamp to meet state and Federal photometric specifications for auxiliary low beam automobile headlamps.

Abstract: A lamp-shade for tubular lamps of outer diameter d, comprising two longitudinally extending, in cross sections evenly concavely curved, light reflecting side shade-faces facing each other and arranged on each side of a middle plane containing the axis of the lamp. The shade further comprising a number of light reflecting cross plates extending between the two side shade-faces evenly spaced along the length of the shade. The distance between the lamp and a plane through the lower edges of the side shade-faces being between 1.7 d and 3 d. Each side shade-face being evenly curved from an uppermost portion situated at a level higher than that of the upper side of the lamp and having a minimum distance from said middle plane not exceeding 0.6 d to the lower edge and is near the latter touching a plane parallel to the middel plane in a distance therefrom of between 1.3 d and 3 d. The lower border zone of each side shade-face having a height of between 0.2 d and 0.

Abstract: A louver attachment for lights is constructed so that it is collapsible and portable to permit its use in a variety of applications wherein it is placed over the front of a light source to limit lateral distribution of the light. This configuration is advantageously used in connection with photographer's lighting systems. A framework is provided having two oppositely positioned parallel horizontal members having a series of openings along their lengths. A pair of parallel vertical side members connect corresponding ends of horizontal members together. The interconnections are allowed to pivot so that the parallelogram shaped structure may be collapsed. A wide ribbon is then woven between the horizontal members passing through the openings to form louvers. The ribbon is secured at either end to the framework. Conventional methods of attachment serve to attach the louver attachment over the front of a light source.