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"Everyone acquainted with the subject will recognize it as a conspicuous failure."
Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb
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| Number | Title | Issue Date |
| 4473872 | Par spot lamp A spot lamp having a lens with a series of concentrically disposed fluted rings on the internal lens surface in combination with an outer concentric ring adjacent to and wider than any one of the fluted rings and having a stippled surface. The spot lamp r... | 09/25/1984 |
| 4462068 | Luminaire with improved lens structure A new and improved luminaire combination is disclosed having a novel lens structure formed with a generally horizontal first lens surface and a generally vertical second lens surface with a generally horizontal flange formed on the second lens surface. Th... | 07/24/1984 |
| 4456948 | Motor vehicle headlamp with a narrow outlet window 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... | 06/26/1984 |
| 4451872 | Process for the most uniform illumination of a surface by a collimated beam of rays and arrangement for laser diagnostic A process for the most uniformly possible illumination of a surface by a limated beam of rays with arbitrary distribution of the beam intensities. An equalization in intensity is achieved in a plane perpendicular to the direction of the beam in that, in the p... | 05/29/1984 |
| 4450509 | Lanterns for area lighting The invention provides a lantern for an area light, particularly one having a cut-off light distribution. A central area of a transparent or transluscent bowl of the lantern has in alternation externally facing reflecting prisms and flats. There are suffi... | 05/22/1984 |
| 4428031 | Illumination device An illumination device for illuminating the interior of a room comprising an optical wave guide for transmitting light rays and a convex Fresnel lens for refracting light rays emitted from an exit end of the optical wave guide. In order to obtain the most... | 01/24/1984 |
| 4420796 | Device for dispersing light rays issuing from a light guide A simple compact robust device for dispersing light rays issuing from a light guide. The device has an elongated body of a rigid transparent material, an end of the body being tapered to define an inclined nearly conical peripheral surface, so that those ... | 12/13/1983 |
| 4393440 | Cover assembly for airport guidance light A cover assembly comprising a cover having a plurality of holes for securement on top of a light base, said cover having a central top portion formed with at least one window for the exit light beam and an upwardly inclined ramp in front of said at least ... | 07/12/1983 |
| 4390930 | Indirect lighting fixture with improved light control 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 port... | 06/28/1983 |
| 4389698 | Headlamp inter alia for motor vehicles This invention relates to a headlamp inter alia for motor vehicles. The headlamp comprises a lens (1) formed by a number of juxtaposed dioptric elements (4) each having a focal point (F) and an axis (5); a light source (6-10) is provided for each element (4) v... | 06/21/1983 |
| 4371916 | Motor-vehicle lamp with base area illumination A lamp for motor-vehicles wherein the base area of the prismatic cap is encompassed by a transparent plate in direct optical contact with the base area and adapted to direct into its interior the light emerging from the base area in a substantially radial... | 02/01/1983 |
| 4263641 | Reflector for lighting and/or indicator devices especially for vehicles The reflector has a transparent body in the form of a paraboloid with a light source located within the reflector along the axis of symmetry. The inner surface of the reflector has a plurality of circular ridges of generally triangular cross-section, each... | 04/21/1981 |
| 4261031 | Ribbed lenses for headlamps A motor vehicle headlamp lens has two zones A1 and B containing ribs of different width to produce different amounts of lateral spreading of the headlamp beam. Between these zones a transition zone A2 is provided where a gradual change in the width of the... | 04/07/1981 |
| 4163277 | Spotlight An axial spotlight system, including an axially mounted arc lamp in an ellipsoidal reflector. The usually associated thermal problem at the forward terminal of the lamp is eliminated by a metal mounting frame which connects the terminal to the reflector a... | 07/31/1979 |
| 4152756 | Railroad crossing signal lamp An improved railroad crossing signal includes a deep dish parabolic reflector and an essentially flat plastic lens angled forward at the top relative to the axis of the reflector. The lens includes prism elements for laterally dispersing parallel light fr... | 05/01/1979 |
| 4120018 | Stop, tail and signal lamp A back-up lens for a stop, tail and signal lamp comprising a body of clear plastic material having an inner surface with dioptrics and catadioptrics thereon and an outer surface with cylindrical surfaces thereon.... | 10/10/1978 |
