Abstract: 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.

Abstract: An arrangement for mounting a thermal protective device including a case in which there is mounted a temperature sensitive element, in a lighting fixture adapted for recessed mounting in a ceiling support surface, includes a receptacle dimensioned for receipt of the thermal protective device. The receptacle is mounted on the interior surface of the side wall of the recess mounted housing of the lighting fixture. The housing side wall defines an aperture predeterminedly located therein with which the temperature sensitive element is aligned for sensing the temperature of the area adjacent the exterior surface of the housing side wall. The receptacle includes fingers for biasing the thermal protective device into engagement with the interior surface of the housing side wall. The receptacle is constructed of reflective material to reflect heat emanating from the lamp of the lighting fixture away from the thermal protective device.

Abstract: A shock absorptive magnetic mounting support for a light fixture or the like object includes a base having a magnet mounted thereon for magnetically securing the mounting support to the underside of a metallic shelf or support surface. A support shaft upon which the light fixture is mounted has a threaded end portion received in an aperture in the base. A stop adjacent the threaded end portion limits the insertion thereof into the aperture. A rubber washer of a predetermined thickness is received on the threaded end portion of the shaft in abutting relation with the base. A nut, and, if desired, a lock washer, is received on the threaded end portion of the support shaft. The nut is tightened down against the rubber washer to secure the base and support shaft in a joined condition. The shock absorptive arrangement aids in preventing detachment of the magnetic base from the metallic shelf support in the event of the application of force to the upper side of the shelf.

Abstract: A plaster frame for mounting a lighting fixture in recessed fashion in a ceiling comprises a main body portion including a rectangular, planar member defining an aperture therein, the aperture being similarly dimensioned to the ceiling aperture in which the lighting fixture is to be mounted. Hanger bar brackets are integrally formed with the planar member at breakaway junctions along opposite, first sides of the planar member. The hanger bar brackets are adapted to receive hanger bars for mounting the plaster frame between spaced joists supporting the ceiling. Each hanger bar bracket is removable from the planar member by bending at the breakaway junctions. The hanger bar brackets are reattachable to the planar member along opposite, second sides thereof by means of bendable, spaced tabs formed on the brackets receivable in similarly spaced apertures defined in the planar member.

Abstract: An in-line fuse holder capable of handling currents as high as 30 amps, adapted to accept miniature, relatively flat, plug-in fuses which have a pair of flat terminals and a fuse link visibly retained within a relatively flat plastic case. The in-line fuse holder has a relatively rigid casing in which a pair of generally U shaped contact clip assemblies are mounted for receiving the flat terminals of the plug-in fuse. The contact clips are of two piece construction with an inner clip of highly conductive material and an outer clip of highly resilient material. The outer clip fits over the inner clip to force the inner clip into low resistance contact with the fuse terminals.

Abstract: An outdoor luminaire having a reflector adapted to provide uniform illumination of a relatively large, generally level surface. The reflector is comprised of a pair of side segments and contiguous concave top and bottom segments surrounding a light center. The top segment includes three cylindrical portions which are circular in section, the portion adjacent the top edge having its circular center well in front of the light center, while the other two circular cylindrical portions have their centers behind the light center. The bottom segment includes a transient portion and a cylindrical portion which is parabolic in section. The parabolic cylindrical portion is adjacent the bottom edge and has its foci at the light center. The side segments are tilted to reflect light from the light center directly out of the luminaire.

Abstract: This disclosure relates to the construction of butterfly valves of the type used for controlling fluid flow and, more particularly, to a seal for use in sealing the periphery of the closure member of such valves. Further, the seal disclosed herein is loaded by the pressure of the fluid being handled, to enhance the tightness of the seal.

Abstract: A multiple element current limiting fuse has a plurality of tube fuses soldered at opposite ends to a pair of metallic end bells having blade-like terminals for connection to busbars of an external electrical circuit. Fasteners having the general dimensions of the tube fuses are also mounted between the end bells and connectors, such as, studs or rivets are formed on ferrules at opposite ends of the fasteners to mechanically couple the fasteners to the end bells and preserve the spacing between the end bells even when the fuse is subjected to tensile forces and elevated temperatures efficient to soften the solder. The use of a hollow ceramic body and hollow connectors at the ends of the fasteners permits the passage of coolant through the fasteners for cooling the multiple element fuse.

Abstract: A multiple element fuse has a pair of end bells with terminals for connection to spaced apart busbars of an external electrical circuit. A plurality of tube fuses are mechanically fastened and soldered at opposite ends thereof to the end bells. The tube fuses have insulative tubular bodies with metallic ferrules attached at each end. The ferrules which are received in cavities defined in the end bells, include hollow studs for receipt in countersunk holes also formed in the end bells. The studs are flared and/or receive expansion plugs to mechanically attach the tube fuses to the end bells, thereby to preserve the spacing between the end bells even when the fuse is subjected to tensile forces created by the busbars and sufficient heat to melt the solder during fuse clearing.

Abstract: A tungsten filament lamp incorporates arc discharge electrodes for an arc discharge in a gas fill enclosed in the lamp envelope. The tungsten filament is utilized as a ballast resistance for the arc discharge. A method for mounting the filament and electrodes in an embodiment according to the invention is shown.

Abstract: The invention relates to a socket for a baseless cartridge lamp, particularly a two-filament cartridge lamp or a cartridge halogen lamp with contacts at opposite ends thereof.

Abstract: An air-operated switching device includes first and second spaced supports on which an armature is mounted. The armature includes a resilient blade fixedly mounted at a first end on the first support and for sliding movement with respect to the second support. A resilient contact finger extends from the slidably supported end of the armature and includes a free end having a contact thereon. A fixed contact is positioned in alignment with the contact of the finger. An air-operated actuator applies pressure to the blade causing it to flex with the one end of the blade moving slidably over the second support, thereby causing the finger contact to be moved into engagement with the fixed contact with a wiping motion.

Abstract: The invention relates to a service brake system for towed vehicles and particularly to a service brake system for double trailer combinations and a metering relay valve therefor. According to the invention, a variable reaction amplifying relay valve, controlled by service brake control line pressure, meters reservoir pressure from the leading trailer to the service brake control line in the trailing trailer. Below a predetermined pressure, the metering relay valve provides an amplified pressure output relative to input. Above this predetermined point, the output pressure is substantially one-to-one.

Abstract: A fuse assembly for a miniature plug-in fuse is provided with a pair of parallel spaced-apart conductive legs, each having plug-in members at one end. A fuse link of generally constant cross sectional area, integrally formed with the conductive legs, extends therebetween to form a fuse assembly of substantially planar construction. The fuse link is provided with one or more transverse offsets, each forming a weak spot.

Abstract: A current limiting fuse includes a fusible strip having semi-circular apertures formed therein, centrally disposed between the longitudinal edges of the strip. The diametric edges of the apertures lie transverse to the longitudinal edges of the fusible strip. The curved edges of the apertures are disposed in opposing relationship. Electrical weak spots which are less conductive than the remaining areas of the strip are defined between the semi-circular apertures and the longitudinal edges of the fusible strip. Semi-circular cut-outs may be included along the longitudinal edges of the fusible strip adjacent the centrally disposed semi-circular apertures to define the electrical weak spots between the cut-outs and centrally disposed apertures.

Abstract: A lighting unit comprising a lamp and a reflector provides high intensity, high efficiency, even illumination over an area of particular shape and size and has a cut-off angle which enables a person to approach close to the lighting unit without seeing the lamp or its reflection. The reflector comprises at least two spaced apart curved reflector surfaces which join each other along an edge line in a plane behind and spaced from the lamp. Points on the curve line of each reflector surface are spaced progressively farther away from the lamp than the edge line. Some points on the curve are located on the side of the plane remote from the lamp. The lighting unit, which may employ reflector surfaces in addition to those above mentioned, may be employed in systems wherein it projects light upwardly for downward reflection from a ceiling or projects light downwardly directly onto a work surface.

Abstract: The invention relates to a method and apparatus for checking the internal pressure of a filled lamp bulb. According to the invention, a filled bulb to be checked is inserted into a gas tight chamber; the chamber is then sealed and pressurized. The lamp envelope is broken by means in the chamber. Chamber pressure is measured before and after breaking the envelope.

Abstract: The invention relates to vacuum fluorescent devices having a grid element positioned between the filament and fluorescent anodes of the device. An insulating material on a portion of the grid is effective to reduce grid current and to enable achievement of greater brightness of fluorescence from the fluorescent anodes.

Abstract: An improved brake fluid reservoir is disclosed. The reservoir is made from polymethylpentene and includes 10-20% by weight glass fibers as an opacifying agent. A translucent reservoir is obtained which has the highly desirable feature of visibility of the fluid level in the reservoir without providing a clear view of the fluid.