Disclosed is an improved ceiling fluorescent luminaire employing a recessed hinged door which supports not only a diffuser or a louver for light control, but the parabolic section reflector as well. The reflector is effective to enhance light output and does not interfere with relamping of the luminaire. The door is openable from either side and totally removable through the use of integral corner clip spring catch hinge members which are disclosed. The light distribution characteristics of the ...

Container caps or containers having a varnish outer coating, or other resinous outer surface, are coded by marking indicia thereon with a fluorescent ink made of a fluorescent brightening agent in an organic solvent but having no resinous vehicle. The solvent softens the varnish and the fluorescent brightening agent penetrates into the varnish layer to remain therein after the solvent is dried off and is brought to view when desired by exposure to ultraviolet light.

A means for locating (search and rescue), and enabling surveillance of, acles, and the identification of reference points, particularly on water and at night, in which a laser is used to illuminate available fluorescent chemicals such as those used for current daylight search and rescue missions.

A fluorescent screen for use as an image intensifying screen is provided having a support, a light reflecting layer, a layer of fluorescent particles and an outer protective coating. The protective coating is a polymeric material having incorporated therein an effective amount of a transparent binary polydimethylsiloxane-polyalkylmethacrylate block copolymer.

The fluorescent lampholder includes a first compressible end for receiving one end of the lamp and a second fixed end for receiving the other end of the lamp. Mounting clips are provided on each of the lamp-holding ends to secure each of the ends in a base panel. Extension tabs are joined to mounting clips on the compressible end and on the fixed end. The tabs are adapted to receive and support a grounding wire or spring for the fluorescent lamp therebetween.

A longitudinally extending, partially translucent casing for a fluorescent tube contains a shade rotatable about the fluorescent tube controlled by a member exterior to the casing.

Compositions useful for imparting fluorescent properties to surfaces comprising at least one compound of the formula: ##SPC1## Wherein R.sup.1 and R.sup.2 represent individually alkyl of 1-18 carbons; R.sup.3 and R.sup.4 each represent a monocyclic or bicyclic aryl radical.

Nylons are conventionally prepared by the condensation polymerization of diamines with dibasic acids. If there is incorporated into the polymerization charge from about 0.1 to 100 moles per 10,000 moles of conventional dibasic acid; a diacid, diester, diamide diacid chloride or diamidediamine of a fused-ring, polynuclear aromatic hydrocarbon having at least three fused rings, the thereby resulting nylon is fluorescent.

An improved fluorescent lighting fixture is provided. The fixture includes a one-piece troffer having a pair of integral side walls extending downwardly from a top portion. Each side wall includes a substantially horizontal shelf containing air vent openings therein. The troffer further includes duct retaining means formed integral with the side walls and adapted to hold air ducts in position to communicate with the air vents. In addition, the troffer includes a first set of latch and hinge pin ...

A fluorescent lantern includes a tubular extruded body portion closed with two covers at the respective opposite ends, one of which is removably mounted. A planar reflector, which extends along the length of the enclosure proximate to a curved side in the form of a lens, includes a tab at one end thereof to which the collector tab of an output transistor is mounted, the reflector tab acting as a heat sink for maintaining the output transistor at a low operating temperature. A fluorescent bulb ex...