Abstract: A diffusion device for a flash gun is provided in the form of a translucent box-like structure which fits on the end of a commercial flash gun. In accordance with one embodiment of the invention, opaque shields are provided for the front and back of the diffusion device which can be selectively added or removed to produce special effects. In accordance with another aspect of the invention, a slot is provided in the top of the diffusion device for retaining a reflector.

Abstract: A signal lamp having in its housing with an opening, a bulb, an optical elements installed in the housing for converting the light of the bulb into parallel rays of light, a colored lens being colored differently in plurality of regularly disposed patterns, a slit plate installed slidably and provided with portions pervious to light corresponding to said pattern in shape and a solenoid, by which the slit plate is shifted and the radiated light is converted in its color.

Abstract: An improved audio chandelier that has, in addition to its conventional illuminating purpose, an audio system such as a stereophonic radio or a security system incorporated into its structure, the former to furnish, for example, music, while the latter has as its purpose to warn of unwanted intrusions and disasters, for example, such as fires, by means of stimulus-responsive warning signals. Ventilation is provided for cooling the various systems components. Control, sensing and energizing means may be provided within a common housing. The modular construction of the device makes assembly and disassembly convenient without the use of special or any other kinds of tools. Ventilation by natural convection maintains electronic and electrical systems within acceptable operating temperatures.

Abstract: A compact, easily assembled flashlight is disclosed in which the casing for the flashlight is made of two identically molded plastic halves in which the molded halves are provided with cradles for a pair of batteries, webs for retaining conductive clips and a web adjacent the bottom for holding a spring contact in position beneath the batteries when assembled inside the casing. A light bulb with a pair of external wire leads protrudes through half of a semi-circular opening in each of the halves such that upon assembly of the halves of the casing in overlying position the bulb extends through a circular opening at one end of the casing. The other end of the casing is formed with a flat web having a hole therein. A pair of metallic switch members, which also are integrally formed with spring members for contacting the lower end of the batteries, have contact elements, spaced apart within the casing between the position of the two batteries.

Abstract: A polycarbonate orientable refractor for a luminaire comprises a mounting ring which has a collar portion fitting a neck portion of the refractor with matching diameters. A diametric interference is provided between a groove in one part and a mating ridge in the other part to an extent allowing a snap fit. Shallow interfering ribs and valleys in the mating surfaces controllably lock the parts together while allowing angular indexing for orienting the light distribution pattern of the refractor.

Abstract: A variable magnification "zoom" spotlight assembly is disclosed in which the diameter and focal length of the focusing lens and object lens are selected so that the angle of incidence of a light ray as it emanates from the lamp and reflector of the assembly and thereafter from the focusing and objective lenses decreases by a constant factor. This angular relationship is established by selecting the diameter and focal length of the focusing lens and objective lens and the diameter and length of the reflector according to the following angular relationship:B.sub.R /B.sub.F .congruent.B.sub.1 /B.sub.R .congruent.B.sub.2 /B.sub.1 =kWhere:B.sub.F =angle of the filament to reflector as measured from the focal axis;B.sub.R =angle of gate to reflector as measured from the focal axis;B.sub.1 =angle of focusing lens as measured from its focal length along the focal axis to its radius;B.sub.2 =angle of objective lens as measured from its focal length along the focal axis to its radius; and,k=constant.

Abstract: The light comprises a cluster of lamp unts (100), pivotally mounted at (6,7), on respective chassis (8) running on a loop track. The lamp units are approximately equidistant from a central axis and illuminate a common patch on the axis. Each chassis (8) is connected to a respective chain (35) which may be driven to move individual chassis (8) along the track, changing the configuration of the cluster. A linkage (26,27,31) enables the lamp unit inclination to be varied and a linkage (12,13,14,16,18 ) enables the relative positions of a bulb (1) and a concave reflector (10) to vary, thereby varying the beam width. The rollers (18) of each unit roll on a surface of a first common hoop and the rollers (31) on a surface of a second common hoop. The hoops are movable enabling the inclination of beamwidth of all the lamp units to be varied simultaneously, changing the patch range or size.

Abstract: An improved holder for a light emitting diode comprising a one-piece flexible cylindrical body having a flange portion with a central opening, a pair of spaced apart integrally formed resilient short leg portions extending from said flange portion axially of said cylindrical body and a pair of spaced apart integrally formed resilient long leg portions extending from said flange portion axially of said cylindrical body and spaced ninety degrees from said short leg portions. The short leg portions include a means for latching the holder in an aperture on a panel. The improvement comprises a retaining shoulder integrally formed at the extremity of each of the pair of long leg portions which extend inward of the cylindrical body at an angle toward the flange portion in the range of three degrees to eight degrees relative to a radial line extending from the axis of the cylindrical body.

Abstract: A lens cap and mount for use with an electromagnetic radiation emitter or sensor in the cap has an integral lens for collimating or converging the emitted or received radiation.

Abstract: A hollow colored translucent body member has an open base end arranged to receive a light bulb. Such base end has spaced slots and also has an outwardly turned flange arranged to be engaged between a bulb holder and an instrument in which the bulb holder is installed upon friction holding engagement of spring tabs on the bulb holder in outer defining portions of a bulb receiving aperture in an instrument to be lighted. The slots in the body member are dimensioned and arranged to receive the spring tabs on the socket end of the bulb holder. The slots in the base end of the body member have a longitudinal length greater than the length of the spring tabs on the bulb holder to provide air spaces for air circulation around a light bulb in the holder.

Abstract: A light assembly including a light unit having a base and terminal means projecting rearwardly from the base, incorporates:(a) a body and a retainer thereon defining a forwardly opening recess to receive the base of the light unit for retention in the recess,(b) the body defining multiple cavities having ends located between the recess and a rear outer wall defined by the body, for reception of the light unit terminal means and for reception of auxiliary terminal means projecting rearwardly of the body.

Abstract: A combined shade and socket holder for being mounted at the end portion of a tubular member and for use in supporting an electrical socket having an opening through a back wall of the socket and for use in supporting a shade, including, a generally cup-shaped housing formed with a closed end portion, an open end portion and an intermediate connecting central portion, the closed end portion including an outwardly extending tubular portion having an unthreaded interior surface for receiving the end portion of the tubular member and a stop surface within the tubular portion for limiting the extension of the end portion of the tubular member within the tubular portion, the closed end portion additionally including light locking members adjacent the tubular portion for locking the end portion of the tubular member within the tubular portion, the central portion for receiving the electrical socket to have the back wall of the electrical socket positioned adjacent the interior surface of the closed end portion and w

Abstract: A mine lamp has a support to which is releasably secured a flat base plate having a stepped outer edge and a forwardly directed face. This outer edge is formed with an annular abutment surface lying in a plane generally parallel to and offset backwardly from the face and an annular outwardly directed guide surface inclined at an angle to the abutment surface. A light tube is releasably supported on the base plate within the edge and in front of the face. A concave, at least partially transparent, and at least limitedly elastically deformable cover has an end wall generally parallel to and offset forwardly of the face and a continuous annular side wall extending backwardly from the end wall and having an annular rear edge formed with an annular and generally planar surface engaging backwardly against the abutment surface and an annular retaining surface engaging inwardly against the guide surface.

Abstract: A holder is provided for mounting a light emitting diode (LED) in an aperture in a panel. Relatively short fingers on the holder project through the aperture and engage the opposite side of the panel. Relatively long fingers independent of the short fingers project through the aperture and grip the LED so that the LED can be released from or inserted in the holder with the holder either in mounted or unmounted position.

Abstract: A lighting fixture employing a cover or lens, preferably of flat glass or plastic. A slidable or pivotal retaining clip is provided for either opposite corners or for each corner of the cover. Each clip acts to hold the cover lens without the need for a surround frame. The retainer clips are slidable or pivotal between a hold position clamping the lens to the fixture body and a release position in which the fixture is freed of the retaining or clamping action of the clip. In the release position, the clip is held on the face of the fixture by holding stops on the fixture body.

Abstract: A mount for an LED and lens cap enables attachment of these components to a circuit board, the LED wires retaining the LED, cap and mount to the board. The mount typically includes:(a) a holder having first and second sections,(b) said sections having shoulders to engage and support the lens cap when the sections are assembled to the skirt portion of the cap,(c) the holder having recesses to pass said wire leads from the interior to the exterior of the holder when the sections are assembled to the skirt portion of the cap.

Abstract: A method for using mass-produced light-emitting diodes of a predetermined luminance in instruments requiring a precise luminance value and a light-emitting diode arrangement for adapting such mass-produced light emitting diodes to such instruments. The above-noted method includes the steps of disposing an LED in a lengthwise adjustable manner within a sleeve, closing the sleeve with a light diffusing disc at an end thereof from which the light from the LED is intended to merge and displacing the LED within the sleeve in such a manner that a precisely defined luminance appears at the diffused disc. In accordance with a preferred embodiment of the apparatus, a tubular sleeve of an elastic plastic material is provided with mounting threads at one end thereof for mounting same within a cap with a light-diffusing disc located between the threaded end of the sleeve and the cap. Additionally, the sleeve is provided with longitudinally extending beads within which electrical connectors of the LED can be mounted.

Abstract: A mounting post for holding a light emitting diode in an electrical pushbutton switch is formed by a cylindrical base which has a pair of cut-out sections located intermediate the top and bottom surfaces of the base which are diametrically opposed on opposite sides of the base. The cut-out sections divide a pair of elongated, parallel passageways for the leads of a light emitting diode (LED) or other light device into upper and lower segments so that a portion of the leads of the inserted LED are exposed in the cut-out sections. The leads of the LED are then crimped in the cut-out sections so that the lead forced against a rear wall of these sections with the leads being restrained from moving by engagement of the leads with upper and lower walls of the cut-out sections.

Abstract: Electric light fixture for the illumination of ovens of electric ranges characterized by a pot-shaped metallic mount insertable in a cut-out in an oven wall and holding a lamp socket, lamp and cover glass which can be screwed on to the front side of the fixture into said mounting and the mounting having a stop rim and holding members corresponding to the edge of the cut-out on its rearward side for the lamp socket which is held in position by resilient tabs and the light fixture being particularly characterized in that it can be mounted in position by a single person.

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 light emitting assembly attachable to a display panel includes clip member defining spring fingers projecting rearwardly at the side of a light unit, as for example an LED. The fingers define first grooves to receive a boss on the unit, and second grooves to receive portions of the display panel adjacent a panel opening into which the clip member is inserted. The spring fingers also define first cam surfaces rearwardly of the first grooves and angled to be spread by the unit boss in response to forward insertion of the unit through the clip member and into a lens cap integral with the clip member. The caps may be round or generally rectangular or square in outline, and masks may be employed between caps arranged in a row.

Abstract: A lens casting or housing provides a series of grooves for selective mounting of various lenses to achieve various beam spreads. By spacing lenses in the housing, it is possible to reduce the diameter and thickness of the lens nearer the light source with consequent improvement in thermal characteristics as well as efficiency in light transmission.

Abstract: A decorative drop ceiling including a panel having a plurality of openings therein disposed between a source of light and an area to be illuminated. A light transmissive lens is disposed in each of the openings. Each lens has a predetermined thickness dimension, which is not dictated by the thickness of the panel. The lower face of each lens is co-planar with the lower surface of the panel. The periphery of the lens is recessed, and fasteners, disposed in the recess, fix the lens in the opening.

Abstract: A marker lamp comprising a housing and a lens. The housing has an opening into which the lens extends. An O-ring is positioned in a circumferentially extending groove in the opening of the housing. The lens has a cylindrical portion that extends into the opening which has a cylindrical surface that is engaged by the O-ring. The cylindrical surface has a length in a direction of the axis thereof greater than the width of the groove in the housing. The lens also has circumferentially spaced axially extending projections on a portion of the lens that extends axially beyond the groove.

Abstract: A lamp cap for use with an indicating light assembly or illuminated push button wherein the light source is a light emitting diode or other low output light producing device. A light concentrating lens is included which conducts light from the light source to the top of the lamp cap wherein a concentrated light pattern appears to indicate operation of the associated light producing device.