Curved Surface Patents (Class 362/347)
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Patent number: 4559589Abstract: Lighting fixture including an enclosure, means disposed in the enclosure for supplying a central source of light therein, a concave, generally parabolic reflector for directing a main beam of light out of the enclosure from the source generally along a given optical axis, the central source of light being located at the focal region of the concave reflector, the concave reflector having a light penetrable region thereof disposed at least at one side of the optical axis in a horizontal plane in common with the central light source, the light-penetrable region forming an escape window out of the enclosure for part of the light from the source.Type: GrantFiled: September 16, 1983Date of Patent: December 17, 1985Inventor: Knut O. Sassmannshausen
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Patent number: 4539628Abstract: Light fixtures with a rod-shaped light source (1) and with concave reflectors on both longitudinal sides of the light source. The concave reflectors extend above the light source, and have a curvature such that all light rays reflected across the light source will emerge in the transverse direction either directly or after reflection at an angle that is steeper than a light-specific masking angle (.alpha.). The reflectors include lamellae (4) that have an approximately V-shaped cross section and run across the middle vertical longitudinal plane of the light source and have reflecting concave side surfaces with a curvature such that all light rays reflected in the longitudinal direction of the light source (1) will emerge in the longitudinal direction either directly or after reflection at an angle that is steeper than a light-specific masking angle (.beta.).Type: GrantFiled: April 2, 1984Date of Patent: September 3, 1985Inventor: Christian Bartenbach
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Patent number: 4536827Abstract: A probe for inspecting the inner surface of a tube is disclosed. The probe (10) utilizes a group of large diameter optical fibers (12) as a light source and an annular ring (14) of smaller diameter optical fibers as interceptors of the reflected light. A pair of plano-convex lenses (16) focuses the light beam emanating from the group of large diameter optical fibers (12) onto a reflective ball bearing (18) or a concave cone (32) causing a circumferential band (44) to be illuminated on the inner surface of the tube. Light from the band (44) is intercepted by the optical fibers within the annular ring (14) and is transmitted therethrough. The transfer of light from the band (44) to the annular ring (14) is optimized by beveling the end of the optical fibers within the annular ring (14).Type: GrantFiled: January 30, 1984Date of Patent: August 20, 1985Assignee: The Babcock & Wilcox CompanyInventors: John W. Berthold, III, Charles S. Fitzgerald
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Patent number: 4536834Abstract: A reflector (R) having an improved neck section that increases the useful light output of the lamp is disclosed. The reflector lamp comprises a concave reflector having a primary reflective surface with a parabolic shape, one or more intermediate reflective surfaces with a parabolic shape substantially confocal with the primary reflective surface, and an improved neck section comprising a reducing section, a first substantially straight cylindrical section, an expanding section and a second substantially straight cylindrical section.Type: GrantFiled: May 22, 1984Date of Patent: August 20, 1985Assignee: General Electric CompanyInventors: Robert W. Sands, Daniel M. Bloom
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Patent number: 4535390Abstract: A folding reflector for a lantern is formed from a pair of reflecting panels which are pivotally secured for pivotal movement between a folded position in which the panels are superposed and an extended position in which the panels extend in opposite directions from the pivot. When the panels are extended, the reflector can be inserted around the globe of the lantern. When the panels are folded, the reflector can be stored in the bottom of the fount of the lantern.Type: GrantFiled: June 22, 1984Date of Patent: August 13, 1985Assignee: The Coleman Company, Inc.Inventors: Richard D. Curtis, James R. Conley
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Patent number: 4528618Abstract: A lamp for a picture-screen work station having a holder for a lamp body which has a reflector and a source of light, characterized by the fact that the holder is of bar shape and is displaceable in three dimensions by joints on its ends and bears two lamp bodies which are individually displaceable in three dimensions independently of each other.Type: GrantFiled: June 2, 1983Date of Patent: July 9, 1985Inventor: Hans-Ulrich Bitsch
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Patent number: 4524405Abstract: A fan-shape foldable reflector apparatus for use with known flashing or constant beam light-source types, such are generally used by photographers for producing indirect-lighting effects by directing the emitting beam from such a light-source type to impact a reflective surface which faces an area to be so illuminated. The said fan-shape reflector produces similar indirect-lighting effects by causing the beam emitted from such a light-source type to impact this forward-curved reflective means at an upward oblique angle, thereby the beam is refracted, broadened and richochetted as diffused rays onto a subject area to which said reflector is principally faced. This improved reflector additionally comprises all necessary means for attaching and positioning various type light-sources.Type: GrantFiled: September 8, 1983Date of Patent: June 18, 1985Inventor: Charles M. Heard
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Patent number: 4520433Abstract: A vehicle lamp, such as a headlamp or fog lamp, having a concave reflector truncated at its top and bottom, one of the truncated surfaces being closer to the optical axis than the other truncated surface, and both truncated surfaces being substantially non-reflective. This achieves significant glare control without requiring a separate shield between the light source and the reflector.Type: GrantFiled: August 30, 1984Date of Patent: May 28, 1985Assignee: General Electric CompanyInventor: Walter J. Kosmatka
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Patent number: 4519019Abstract: A ceiling light fitting has three extended, constant-section reflectors which are parallel to the wall, the reflector being swingable back to enable the lamp to be changed. The lamp filament is linear and parallel to the wall. The reflectors are of part-circular section and enhance the light, as well as the reflector acting as a mask to prevent the filament being seen from behind the fitting. The reflector projects very little below ceiling level. The reflector is parabolic with the filament at its focus, the axis of the parabola being directed at the base portion of the wall. The reflector faces downwards and has at least its major part above the level of the filament and on the wall side of the filament.Type: GrantFiled: April 20, 1984Date of Patent: May 21, 1985Assignee: Quantum Lighting LimitedInventor: Stephen M. Hall
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Patent number: 4517630Abstract: The optic axis of a vehicle headlight comprises a reflector, an incandescent helix and a convergent lens. The reflection surface of the reflector is parabolic in the horizontal midplane section and is elliptical in vertical median section. A narrow band of light spreading out laterally is thus produced without supplementary optical components, particularly the diffusion disk or dispersion lens. A sharp light-to-dark boundary is obtained by a diaphragm having an effective straight edge 18 located below the outer ellipse focus, which is coincident with that one of the principal foci of the converging lens which is the nearer to the reflector.Type: GrantFiled: November 30, 1982Date of Patent: May 14, 1985Assignee: Robert Bosch GmbHInventors: Rudiger Dieffenbach, Werner Grunwald, Peter Perthus, Friedrich Prinzhausen
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Patent number: 4517631Abstract: A reflector for use with a light source in which the light source is shielded from direct view. The reflector provides even illumination, with high efficiency by reflecting light from the light source around the light source rather than to be blocked thereby.Type: GrantFiled: May 14, 1984Date of Patent: May 14, 1985Assignee: J. W. Lighting Inc.Inventor: Jack R. Mullins
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Patent number: 4514793Abstract: When it is desired to increase the light yield from fluorescent tube installations without reflectors by providing the fluorescent tubes with a reflector, it is often difficult to mount and position the reflector in an existing light fitting, and it is even more difficult when such fluorescent tubes sit freely on a wall or a ceiling, or are mounted externally on a fitting.For this purpose the reflector system comprises a reflector (4) of anodized aluminium and securing elements (1) consisting of spring straps which surround the fluorescent tube (5) and secure the reflector (4) to the fluorescent tube by means of friction between the securing element's strap (1) and the fluorescent tube (5).Also provided is a second embodiment of the securing element which is intended for fittings with a flat surface. In this case the securing element has some protruding ends which bear against the flat surface of the fitting and thus position and secure the reflector in the correct position.Type: GrantFiled: August 2, 1983Date of Patent: April 30, 1985Inventor: Knud Andreasen
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Patent number: 4511955Abstract: A vehicle headlight for providing a shaped beam spreading as a flat bundle. A dish-shaped reflector is employed where the inner reflection surface in the axial longitudinal sections in each case forms an ellipse segment, where the ellipse eccentricity increases from the longitudinal section spanned by the vertical and the reflector axis to the longitudinal section spanned by the horizontal and the reflector axis, where the focal points of the ellipse segments of all sections disposed in planes containing the reflector axis coincide, and where the vertices of the ellipse segments of all sections disposed in planes containing the reflector axis coincide. The depth of the reflector within the longitudinal sections of the reflector containing the reflector axis corresponds to the longer half-axis of the respective ellipse.Type: GrantFiled: May 16, 1983Date of Patent: April 16, 1985Assignee: Westfalische Metall Industrie KG Hueck & Co.Inventors: Hans-Otto Ernst, Wilhelm Rohling
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Patent number: 4507254Abstract: Improved light reflector apparatus for use in an electronic flash unit or the like is formed by an injection molding operation, which causes both precise shaping of a reflector and accurate mounting of the reflector securely within a housing. A light-reflecting flexible sheet is placed in a mold so that its light-reflecting front surface is centrally positioned adjacent a mold forming surface. The forming surface, which is larger than the sheet, has a contour adapted for shaping the sheet to reflect light into a beam of illumination. Liquid plastic is injected into the mold under pressure against the opposite surface of the sheet, thus pressing its light-reflecting surface into intimate contact against the forming surface. Because the sheet is smaller, the border of the forming surface is not covered by the sheet. Plastic flows beyond outer edges of the sheet against the uncovered border of the forming surface.Type: GrantFiled: November 5, 1982Date of Patent: March 26, 1985Assignee: Eastman Kodak CompanyInventors: Steven D. Daniels, Jeffrey R. Stoneham, John K. Erickson
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Patent number: 4506314Abstract: A submersible lamp having a standardized air impervious housing with a lens formed therein in optical alignment with a bulb carried within the housing. The housing defines a predetermined quantity of air and has an opening at the lower end thereof such that upon submersion in water a limited amount of water is allowed to enter the housing, trapping the air within the housing and preventing the water from rising above a predetermined level. A channel is formed on the rear wall of the lamp housing to receive a bulb and bulb socket support bracket for the selective mounting and positioning of the bulb within the housing in accordance with the function which the lamp is to perform.Type: GrantFiled: September 21, 1983Date of Patent: March 19, 1985Inventor: Dennis G. Moore
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Patent number: 4504889Abstract: Although small enough to fit in a purse, this flashlight operates on six volts using a full-size flashlight bulb and casts a bright and quite-uniform beam of light, primarily for brief uses at relatively short range.The uniformity of the beam is obtained by a novel optical system, that includes an unsilvered, preferably generally parabolic reflector and a beam-narrowing lens. The combination of compactness and brightness is obtained by novel arrangement of the bulb and four penlight cells within the battery case, enhanced by the geometry of the reflector and lens.Type: GrantFiled: December 27, 1983Date of Patent: March 12, 1985Inventor: Adolph E. Goldfarb
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Patent number: 4498124Abstract: A dual halogen bulb rectangular lamp assembly with a one-piece plastic reflector having two adjacent paraboloidal mirrorized inner surfaces. A halogen bulb unit is mounted in each of the mirrorized surfaces and they are electrically connected in series for simultaneous bulb energization.Type: GrantFiled: June 28, 1982Date of Patent: February 5, 1985Assignee: Stewart-Warner CorporationInventors: William Mayer, Alton E. Runions
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Patent number: 4495552Abstract: A lamp is provided for use on vehicles, which lamp is of the type wherein the light rays are projected forwardly in a predetermined pattern. The predetermined pattern is generated by virtue of a generally continuous grid of the reflector within the lamp, and the lamp does not need a prismatic lens system at the location where the light rays eminate from the lamp.Type: GrantFiled: December 13, 1982Date of Patent: January 22, 1985Assignee: Cal Custom Accessories, Inc.Inventor: Henry W. Graff
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Patent number: 4494176Abstract: A reflector lamp having multiple and aimed parabolic reflective sections so as to improve the desired beam pattern is disclosed. The reflector lamp may be of the parabolic aluminized reflector (PAR) or the reflector (R) type lamps having primary, multiple intermediate and rear sections of a parabolic contour which improves the internal light reflective and absorption characteristics of the reflector lamp. The overall effect is to improve the optical efficacy of the reflector lamp.Type: GrantFiled: March 14, 1984Date of Patent: January 15, 1985Assignee: General Electric CompanyInventors: Robert W. Sands, Joseph P. Marella, Thomas F. Fink, Jr.
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Patent number: 4494175Abstract: A recessed lighting fixture used in association with a suspended ceiling system made up of several spaced grid members. The lighting fixture is comprised of a fixture housing having means for supporting at least one fluorescent lamp and includes a relatively thin deflectable top plate which in turn may include a reflecting surface disposed over the fluorescent lamp. Means are provided for securing the fixture housing to the grid members. The louver assembly of the fixture is mounted in a simplified manner and includes a top portion designed to contact the deflectable top plate during insertion and a bottom portion including longitudinally extending sides designed to rest upon and be supported by the spaced grid members. The louver's bottom portions are insertable on the grid members in sequence, first one and then the other, whereby the louver assembly is firmly supported in the fixture housing without the requirement of additional hardware such as springs, latches or the like.Type: GrantFiled: January 9, 1984Date of Patent: January 15, 1985Assignee: GTE Products CorporationInventors: Mahmoud A. Gawad, John Graudins
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Patent number: 4493013Abstract: 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.Type: GrantFiled: February 14, 1983Date of Patent: January 8, 1985Inventor: Kenneth R. Hawkins
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Patent number: 4482942Abstract: An improved projection unit including a glass reflector having a forward reflecting portion which includes an internal substantially concave reflecting surface and an apex portion with an opening therein. An incandescent lamp is oriented such that its envelope portion is arranged relative to the reflecting surface of the reflector and its sealed end portion having a pair of spaced apart lead-in wires projecting therefrom is arranged within the reflector's opening. An electrically insulative cap member is fixedly secured to an external surface of a glass reflector immediately adjacent the reflector's rear opening. The cap member includes a pair of contacts spacedly located therein, each of these contacts being joined electrically to a respective one of the projecting lead-in wires from the incandescent lamp. In a further embodiment of the invention, a holder is provided for providing electrical connection between the projection system's circuitry and the incandescent lamp.Type: GrantFiled: June 4, 1984Date of Patent: November 13, 1984Assignee: GTE Products CorporationInventors: Ronald G. Blaisdell, Harold L. Hough, Richard B. Martenson
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Patent number: 4481563Abstract: An automotive headlight has a clear unfluted front cover and a reflector which directs light from a source through the front cover in a desired pattern. The reflective surface is smooth and continuous formed of two edge ellipsoids and a center ellipsoid joined in smooth continuous junctions. The center ellipsoid is modified to include a smooth vertical bump and the ellipsoids are tilted off the axis of the headlight. The headlight is formed by a digital computer aided process which includes tracing the paths of a plurality of light rays emanating from a digitally modeled light source, intersecting a reflector modeled by digital shape functions and projected onto a sphere surrounding the reflector. The light intensity across a part of the sphere is compared with the prescribed automotive headlight specifications. The parameters of the shape functions are changed and the process is performed iteratively to produce a light intensity best matching the specifications.Type: GrantFiled: May 10, 1982Date of Patent: November 6, 1984Assignee: Corning Glass WorksInventors: Edward A. Snyder, Michael P. Teter
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Patent number: 4475147Abstract: A "wall wash" assembly for use with a ceiling mounted, recessed lighting fixture comprising a reflector housing having an open end, includes a ring member dimensioned for receipt in the open end of the reflector housing. A concentric ring segment is mounted on the ring member for movement 360.degree. thereabout. An auxiliary reflector is mounted on the ring segment for movement therewith. Positioning of the auxiliary reflector by movement of the ring segment with respect to the ring member provides a desired "wall wash" illumination pattern. An optional baffle member is receivable on the ring member opposite the auxiliary reflector for blocking light emanating from the reflector housing to be excluded in the "wall wash" illumination pattern.Type: GrantFiled: August 19, 1982Date of Patent: October 2, 1984Assignee: McGraw-Edison CompanyInventor: Paul J. Kristofek
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Patent number: 4467404Abstract: A three dimensional reflective device for attachment to an individual spoke of a spoked wheel includes a pair of matched and mating reflective elements which are attached to each other and to the spoke by a spoke-retention assembly which is completely enclosed by the reflective elements when the device is installed. The spoke-retention assembly includes a pin having a passage to accommodate the spoke, and a locking element which locks the spoke firmly to said pin within the passage. The pin is frictionally retained in a pair of bearing members projecting from the interiors of the reflective elements. Retention of the pin in the bearing members results both in the attachment of the reflective elements to each other, and in the securing of the locking element in its locking position, thereby firmly securing the entire device to the spoke.Type: GrantFiled: November 30, 1981Date of Patent: August 21, 1984Inventor: Jack J. Gordon
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Patent number: 4467239Abstract: To reduce the accuracy requirements and permit greater tolerance in placing f a filament of a halogen cycle incandescent lamp (2) of low wattage, for examle 200 W, within a reflector, particularly to provide a source for projection of super-8 mm film on a ground-glass screen surface, the reflector is positioned in a range in accordance with the hyperbolic equations:A: 0.1477x.sup.2 +1.2617xy+y.sup.2 -31.461x+58.119y-1577.1=0 andB: 0.1201x.sup.2 +1.2503xy+y.sup.2 -30.554x+56.082y-1449.7=0.Preferably, the curvature of the hyperbola equation isC: 0.1339x.sup.2 +1.2570xy+y.sup.2 -31.028x+57.140y-1513.4=0.Type: GrantFiled: November 9, 1981Date of Patent: August 21, 1984Assignee: Patent-Treuhand-Gesellschaft fur Elektrische Gluhlampen mbHInventor: Peter Rakitsch
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Patent number: 4466050Abstract: A back light display assembly is disclosed comprising a dielectric body having a cavity extending therethrough profiled for accepting a pair of contact components. The contact components each comprise a planar body having an upwardly-directed resilient finger at one end, and an insulation displacement structure at the opposite end which projects through the dielectric housing cavity to a bottom surface thereof. The pair of resilient contact component fingers are positioned so as to receive a light-emitting diode semiconductor chip therebetween, and a pair of conductors are engageably mated to respective insulation displacement structure of the contact components to effectuate an electrical path to the semiconductor chips. The dielectric body is packaged within a receptacle having an interior chamber which receives the dielectric body therein.Type: GrantFiled: July 14, 1983Date of Patent: August 14, 1984Assignee: AMP IncorporatedInventor: Joseph L. Lockard
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Patent number: 4463410Abstract: A lighting device operable with solar beams propagating through and emitting from the optical wave guides. A pair of spaced concave and convex reflecting members are provided to effectively diffuse the solar beams issuing from the exit end of the optical wave guides. One of the reflecting members may be constituted by a mirrored electric bulb in order to ensure the lighting device to operate also by electric power.Type: GrantFiled: June 22, 1981Date of Patent: July 31, 1984Inventor: Kei Mori
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Patent number: 4460946Abstract: The reflector arrangement consists of a several plate-shaped elements (12) having abutting edges and being placed to meet in one plane. The plate-shaped elements (12) are held together by a mounting (10) the front plate (13) of which partly covers the elements (12). The front surface of plate (13) is also reflective. A clamping rail (15) is secured to the plate (13) via a clamping hinge. The reflector arrangement can be used in connection with one of the plate-shaped elements (12) or with four plate-shaped elements (12) in total, but it can be also utilized only with the use of the front plate (13) of the mounting (10) as a reflector and without the plate-shaped elements (12). The elements (12) can be piled thus permitting to fold the reflector screen (11) without the formation of creases or breaks.Type: GrantFiled: February 24, 1982Date of Patent: July 17, 1984Assignee: Lunos Luftung GmbH & Co. Ventilatoren KGInventor: Bernhard H. Tinz
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Patent number: 4459647Abstract: A shadow-free lamp assembly comprises a plurality of plane mirror segments disposed on a basic paraboloidal reflecting surface, and a linear light source. Each of the plane mirror segments has a length of the short span of the paraboloidal reflecting surface as its long side and is continuously disposed next to each other along the long span of the paraboloidal reflecting surface and the light source is disposed in reflecting direction forward from the focus of the paraboloidal reflecting surface, whereby all mirror segments reflect light from the light source to produce irradiation patterns illuminating the single illumination area. Because of the overlapped illumination by the plurality of the mirror segments, shadow is not produced on the illumination area when reflected light is partially intercepted.Type: GrantFiled: January 26, 1983Date of Patent: July 10, 1984Assignees: Koito Kogyo Kabushiki Kaisha, Sankin Kogyo Kabushiki KaishaInventors: Osamu Yamauchi, Kazuomi Hoashi
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Patent number: 4459642Abstract: An optical lighting device for diffusing beams of light rays propagating through and emitting from an optical conductor connected to a light source, comprising a semi-transparent hollow column, a first end plate which is connected to one end of the hollow column to close the same and which has a guide hole in which an outlet end of the optical conductor is fitted, and a second end plate which is connected to the other end of the hollow column to close the same.Type: GrantFiled: July 6, 1981Date of Patent: July 10, 1984Inventor: Kei Mori
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Patent number: 4458302Abstract: A reflection-type optical focusing apparatus comprising an optical focusing system including at least two 4th-degree surface reflectors with their revolving symmetric axis formed by a line connecting the position of a point source and the point source focusing position, said reflectors being used in combination so that the light emitted from a point source placed at the point source position is focused to form a virtual point source at the point source focusing position, and a 4th-degree surface reflector with its cross-section, on a plane including the revolving symmetric axis, forming a part of an ellipse with its major axis having a certain inclination with respect to the revolving symmetric axis, said virtual point source being located at one focal point of the ellipse so that a light image in the shape of an arc band is obtained.Type: GrantFiled: June 2, 1982Date of Patent: July 3, 1984Assignee: Hitachi, Ltd.Inventors: Masataka Shiba, Yoshitada Oshida
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Patent number: 4456948Abstract: A motor vehicle headlamp comprising in combination an optical system for recovering flux having a rectilinear focal segment and an optical system for rectifying images having a focal segment coinciding with the former and able to produce a beam of rays of controlled directivity passing through a narrow light window, while preserving a high luminous efficiency. The flux recovery system is constituted by an elliptical paraboloid, an hyperbolic paraboloid or their optical equivalents. By using various combinations of optical elements, it is possible to arrange the flux recovery system both in the axis of the rays leaving the headlamp, as well as on the side of the body work or on the lower part of the latter.Type: GrantFiled: April 12, 1982Date of Patent: June 26, 1984Assignee: Cibie ProjecteursInventor: Norbert Brun
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Patent number: 4455592Abstract: A high intensity light table, for use with a stereomicroscope having movable rhomboid arms, has an illumination source and a reflector. The table also includes light diffusing members which are rotatably mounted thereto. The diffusing members have: (1) magnets affixed thereto which are responsive to movement of the rhomboid arms of the instrument; and (2) means therein for selectively passing a beam of high intensity illumination.Type: GrantFiled: March 21, 1983Date of Patent: June 19, 1984Assignee: Bausch & Lomb IncorporatedInventor: Ronald J. Martino
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Patent number: 4455593Abstract: A high intensity light table, for use with a stereomicroscope having movable rhomboid arms, has an illumination source and a reflector. The table also includes light diffusing members which are rotatably mounted thereto. The diffusing members have: (1) magnets affixed thereto which are responsive to movement of the rhomboid arms of the instrument; and (2) means therein for selectively passing a beam of high intensity illumination. An auxiliary reflector, which is rotatable about the source of illumination, may be employed to substantially increase the intensity of the beam of illumination.Type: GrantFiled: March 21, 1983Date of Patent: June 19, 1984Assignee: Bausch & Lomb IncorporatedInventors: Ronald J. Martino, Alfred L. Shawcross
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Patent number: 4453201Abstract: Illuminated cross having a frame consisting of pairs of vertical and horizontal plates intersecting at knotches therein so that the front and back surfaces thereof are in the same respective vertical planes and that the intersection forms a t-shaped cross; having the front and back surfaces of the resultant cross covered by sheets of translucent material; and having means for illuminating the same including electric bulbs located at the ends of the cross segments, semi-circular notches formed inthe frame plates intermediate the intersections thereof, and convex-shaped reflectors located on the outside of the frame plates adjacent the semi-circular notches.Type: GrantFiled: June 17, 1982Date of Patent: June 5, 1984Inventor: Lee W. Prouty
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Patent number: 4443837Abstract: A mounting fixture for supporting up to two electronic flash lamps and a reflective light umbrella on a photographic light stand is disclosed. The fixture includes two orthogonal flash lamp shoe brackets and an integral deflectable locking arm for securing the fixture body to a vertical post of a light stand. A locking bolt passes through coaxial bores in the arm and the fixture body. The locking bolt includes a cylindrical head having a transverse bore for receiving a shaft of a reflective umbrella. A tubular locking collar is interposed on the shaft of the bolt between the fixture body and the head of the locking bolt. The locking collar includes a pair of diametrically opposed semicircular recess cut into its tubular end edge which are alignable with the openings of the bore in the head of the bolt. The locking collar, together with the bolt head, operates to secure an umbrella shaft in place when the bolt is tightened to secure the mounting fixture on a light stand.Type: GrantFiled: September 29, 1982Date of Patent: April 17, 1984Assignees: Philip M. Casady, Melvin A. PfaelzerInventors: Albert Migliori, Stephen D. Northup
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Patent number: 4443834Abstract: Interior light for vehicles with a reading mode in which the beam can be directed toward either the driver or the front-seat passenger as desired. The light has an opaque screen (13) in the path of the rays of light between the bulb (6) and the reflector (1). The screen has a cutout (15). The reflector (1) consists of at least two paraboloid reflecting surfaces (8 and 9) with optical axes (10 and 11) that meet at an angle .alpha.. The mask (13) is adjusted so that the cutout (15) directs the light against one or the other of the reflecting surfaces (8 or 9).Type: GrantFiled: March 12, 1982Date of Patent: April 17, 1984Assignee: Westalische Metall Industrie KG Hueck & Co.Inventors: Heinz Schafer, Wilhelm Schrader
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Patent number: 4437142Abstract: The present invention is directed to a fixture which is characterized by its ability readily to be lamped and relamped, notwithstanding the fixture is located at a position which is accessible only with difficulty. The fixture includes a socket which coacts with the terminals of a bulb of particular design to center the terminals and to enable electrical and mechanical contact to be effected by a simple inward movement of the bulb relative to the socket.Type: GrantFiled: April 23, 1982Date of Patent: March 13, 1984Assignee: Lightolier IncorporatedInventors: Anthony C. Donato, Neil Russo
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Patent number: 4434455Abstract: The light source of an area light or streetlight mounted on a lamppost is enclosed by a lower upwardly flaring bowl having its upper end closed by a generally conical cap. The cap and bowl are made of polycarbonate pigmented by titanium dioxide so that the cap emits only light sufficient to enable its shape to be seen in darkness and the bowl is much more translucent to emit adequate light for illumination.Type: GrantFiled: May 1, 1981Date of Patent: February 28, 1984Inventor: William H. Merritt
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Patent number: 4429354Abstract: In a lighting fixture louver assembly in which a plurality of louvers with side walls joined at their lower edges by a closed bottom, generally V-shaped in end elevation, are connected to side or end rails, an extension is provided of the lower portion of the louvers, projecting beyond a contiguous upper portion of the ends of the side walls, and cut wings are formed in the extension. The rails have a slot in a side wall extending upwardly from immediately adjacent the bottom edge of the wall and of a size to receive the extension. The extension projects through the slot, and the wings are bent outwardly laterally along a line substantially parallel to the long axis of the louver, a cut surface of each of the wings engaging the back surface of the side wall, whereby the closed bottom of the louver projects uninterruptedly through the side wall of the rail.Type: GrantFiled: September 29, 1982Date of Patent: January 31, 1984Assignee: Emerson Electric Co.Inventor: Willard R. Garnett
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Patent number: 4428036Abstract: This invention relates to light fittings and in particular to a light fitting including a shade or surround in association with a source of light.Type: GrantFiled: November 22, 1982Date of Patent: January 24, 1984Inventor: Philip W. Letcher
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Patent number: 4428038Abstract: To provide for uniformity of illumination across a film window, for example or super-8 mm film, the reflector has at least two contours whose generatrices follow conical sections which have a common optical axis in the direction of radiation emission, and which are so arranged that the sections are formed as sectors, with adjacent sectors having different contours. At least four sectors are used, and preferably the focal point of the generatrices are displaced relative to each other either in the reflector axis or on a parallel thereto, the conical section are identical, and two such conical sections are used, with surface areas at a ratio of between 4:6 or about even.Type: GrantFiled: June 19, 1981Date of Patent: January 24, 1984Assignee: Patent-Treuhand-Gesellschaft fur Elektrische Gluhlampen mbHInventors: Peter Rakitsch, Albert Bodmer
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Patent number: 4425604Abstract: An illuminating device for a display unit in which the display panel can be illuminated uniformly under a relatively constant luminous intensity. The illuminating device according to the present invention comprises a display panel, at least one light source and a reflector the inner surface of which is defined by at least two elliptical surfaces. One of two foci of each of the elliptical surfaces is located at the center of the light source and the other of two foci thereof is located on the inner surface of said display panel in order to focus rays of light reflected by the reflector on an area on the display panel away from the light source.Type: GrantFiled: November 26, 1982Date of Patent: January 10, 1984Assignee: Nissan Motor Company, LimitedInventors: Hiroshi Imai, Fukashi Sugasawa
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Patent number: 4425608Abstract: 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.Type: GrantFiled: February 8, 1982Date of Patent: January 10, 1984Assignee: Villamos Berendezes es Keszulek MuvekInventors: Gyula Hecker, Erno Kenez, Laszlo Nyari, Janos Patta
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Patent number: 4422133Abstract: A luminaire has a spherical or ovoid reflector formed with asymmetrical voids that allow beams from the lightbulb in the reflector to emerge side-by-side through the voids in opposite directions after reflection from opposite internal surfaces of the reflector.Type: GrantFiled: November 9, 1981Date of Patent: December 20, 1983Inventor: William B. Elmer
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Patent number: 4422100Abstract: An illuminator for a traveling scanner of a document scanning system is disclosed. The illuminator comprises an elliptic-cylindrical surface of about one-half an ellipse in section with a line light source lamp located on one elliptic focal line. The illuminator is positioned so that the line of a document being copied is located at the other elliptic focal line. A reflecting cylindrical light baffle is positioned over the lamp to reflect light that would otherwise not strike the elliptical reflecting surface back through the source and onto the elliptical reflecting surface. The open end of the ellipse is covered with a heat filter to protect the material being copied. The ellipse is set at a relatively small angle, and a perpendicular reflection of material from the document being copied passes through a slot in the heat filter and a slot in the base of the ellipse for further sensing.Type: GrantFiled: March 8, 1982Date of Patent: December 20, 1983Assignee: The Mead CorporationInventors: Dale R. DuVall, Barry C. Kockler
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Patent number: 4422135Abstract: An annular illuminator comprising a spheric mirror, an elliptic mirror and a circular cylindric mirror. Flux received directly from the source is reflected by the elliptic mirror and then by the cylindric mirror. Flux not directed initially toward the elliptic mirror is first reflected by the spheric mirror and then by the elliptic and cylindric mirrors.Type: GrantFiled: December 10, 1981Date of Patent: December 20, 1983Assignee: Kollmorgen Technologies CorporationInventor: Calvin S. McCamy
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Patent number: 4420800Abstract: A reflector lamp with a shaped reflector and lens. The reflector is generally parabolic, to reflect light frontwardly. Some of the direct light from the light source is not reflected, and diverges in a beam pattern that would be wasted; the lens refracts this divergent light in a more frontwardly and useful direction. For a floodlight, the lens converges the reflected light rays into a crossover pattern to provide a flood beam pattern.Type: GrantFiled: February 16, 1982Date of Patent: December 13, 1983Assignee: General Electric CompanyInventor: David D. Van Horn
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Patent number: 4420801Abstract: A reflector lamp comprising a concave reflector having a parabolic rear section, a spherical intermediate section, and a parabolic front section, each of the reflector sections having substantially the same common focal point, and a finite light source at the substantially common focal point, the reflector sections being dimensioned so that substantially all light rays from the finite light source which are reflected by the spherical intermediate section become re-reflected by the parabolic front section.Type: GrantFiled: February 26, 1982Date of Patent: December 13, 1983Assignee: General Electric CompanyInventors: Gilbert H. Reiling, John M. Putz, David D. Van Horn