Abstract: A simple, light weight air cooled filter arrangement for a high intensity narrow band pass filtered light fixture. In lighting fixtures such as infrared energy sources or stage lighting, it is necessary to filter a conventional broad spectrum energy source so that only energy in the desired region is transmitted. These filters which absorb energy in bands other than those being transmitted tend to become very hot particularly when high energy sources are required. A light fixture is provided having a plurality of spaced filters near a light output end. Each filter, except the outer most filter, has a portion of its outer periphery removed. These open areas are alternately positioned to form a tortuous air path between adjacent filters. A cooling fan draws filtered exterior ambient air through the tortuous paths between the filters and exits the warmed air past the energy source out the end remote from the filters.

Abstract: A combined lighting system for a building interior includes a stack of luminescent solar concentrators (LSC), an optical conduit made of preferably optical fibers for transmitting daylight from the LSC stack, a collimating lens set at an angle, a fixture for receiving the daylight at one end and for distributing the daylight as illumination inside the building, an artificial light source at the other end of the fixture for directing artifical light into the fixture for distribution as illumination inside the building, an automatic dimmer/brightener for the artificial light source, and a daylight sensor positioned near to the LSC stack for controlling the automatic dimmer/brightener in response to the daylight sensed. The system also has a reflector positioned behind the artificial light source and a fan for exhausting heated air out of the fixture during summer and for forcing heated air into the fixture for passage into the building interior during winter.

Abstract: A replaceable light source assembly is particularly designed for use in a projector housing with sources such as an HMI arc lamp or tungsten halogen lamp where the light source is contained within an envelope. Basically, the light source is closely spaced to a substantially flat mirror which images the light source around the source to produce the effect of a multiplicity of sources. In effect, the light source and its mirror image produces a beam pattern which may be projected towards a suitable projection lens, the light source and mirror are fastened to a heat sink structure to dissipate heat, and the assembly has suitable electrical connections to fit existing housings.

Abstract: The device for producing and projecting light has a reflector (11) with an optical center (12), a short arc discharge lamp (13) with lamp caps (21, 22) provided with pins (23 and 24, respectively) and a lamp holder (14) in which the pin (24) of the lamp cap (22) is fixed by fixing screws (26). The lamp holder (14) has a tube (25) which accommodates the pin (24) which is provided with a longitudinal gap (27), in whose proximity and on either side of which is arranged a respective radially directed fixing screw (26). The gap (27) merges into a transverse gap (28) which covers approximately half the circumference of the tube (25). Due to the gaps (27, 28), the tube (25) has obtained parts which behave like rigid springs and keep the fixing screws (26) pressed on the pin (24). FIG. 2.

Abstract: This invention is directed to a high temperature resistant lighting device for lighting the interior of a high temperature furnace for observing the furnace interior from the outside. A lighting lamp (5) and an inspection device (9) are housed within a metallic heat protective casing (10) having a cooling path (27) for circulation of cooling water. The lamp and an objective section (91) of the inspection device are rotatable with its associated drives (53) and (97) so that the illuminating direction of light from the lamp and the viewing direction of the objective section are variable so as to direct illuminating light beams from the lamp toward a wall surface of the furnace via a viewing window (4) and focus reflected light beams from the wall surface of the furnace onto the objective section.

Abstract: There is disclosed an optical system for reading light-activatable marks on a record medium. The system includes a coupling for connecting a light bulb and a light conductor which allows for relative movement between the light bulb and the light conductor while maintaining light transmitting contact therebetween.

Abstract: Add-on device for lead-type ballast comprises additional inductor and series-connected controlled AC switching means which are connected in parallel circuit with the capacitor portion of the lead-type ballast such as is used to operate an HID sodium lamp. The add-on device has a sensing and control circuit which operates to sense a lamp operating parameter in order to control the actuation of the AC switching means which in turn controls in predetermined fashion the operation of the ballasted lamp. The inductor and AC switch and sensing and control means of the add-on device are all packaged within a can-shaped member which has dimensions similar to those of the conventional capacitor can for the lead-type ballast. All the elements of the add-on device are potted within the capacitor can with terminal means extending from an end portion thereof for ready connection along with an exposed potentiometer portion to enable the control to be adjusted.

Abstract: A lamp assembly comprises a high pressure discharge lamp and reflector wh are secured together as a structural unit. An insulating base is connected to the neck end of the reflector and to the lamp, and a front end ring is connected to the front, light emitting end of the lamp and reflector assembly. A pair of electrical connection members, preferably in the form of pins, are associated respectively with the base and end ring and are rigidly connected to the respective associate base and end ring. The connection members are electrically connected to respective ends of the lamp, the lead-in wire of the lamp and the front or light emitting end of the structure extending from the lamp substantially radially to at least one of the reflector and end ring and then extending directly to the connection member associated with the end ring. Preferably, the lead-in wire at the front end of the structural unit acts as a support and adjustment or locating member of the lamp.

Abstract: A mobile lighting unit which includes a plurality of lighting fixtures, each utilizing high-wattage, high-intensity lamps. The fixtures comprise a socket and hemispherical reflector assembly which are vertically and horizontally adjustably mounted to a lighting rack by an adjustable elbow member. The lamps are positioned in said fixtures so that their longitudinal axis is parallel to the light beam formed by the reflector, requiring one end of the lamp to be inserted in the socket and the other end to extend to the center of the hemispherical reflector. The lamps are cooled by pressurized air produced by a fan and transported through air tight channels in the lighting rack. The lamps are shock-dampened by mounting their socket end to a metal spring located on the interior wall of the socket and by attaching wires to the front end of the lamp, which are in turn attached to metal springs on the interior surface of the reflector. Thus, the lamp is fully shock absorber protected.

Abstract: A mounting arrangement for auxiliary operating components for a high-pressure vapor discharge lamp in a standard inverted cup-shaped mounting structure for an incandescent street lamp comprises a U-shaped bracket attached by a leg of the bracket to the interior of the structure with one leg of the bracket being centrally located in an open end of the structure. A holder for the lamp is attached to the leg of the bracket located in the open end and a reflecting metallic heat shield closes the remaining portion of the open end. One of the auxiliary components is a capacitor which is attached to the other side of this leg and in the interior of the structure by a mounting strap which spaces the capacitor from contact with other components and the structure to limit transfer of heat to the capacitor.

Abstract: Wall mounted luminaire of hazardous duty type has mounting arm designed to protect luminaire parts from excessive pressure of explosive gases. The mounting arm is formed with an elongated wire passage of relatively small diameter wherein the gases are cooled and reduced in pressure before entering the luminaire housing.

Abstract: An electric lamp reflector comprising a pair of similar, substantially hemispherical reflectors open at the outer ends and having inner openings coaxial with the central axis and said reflectors being nested together and uniformly spaced apart a limited distance except at the inner ends where cylindrical extensions are provided to engage each other and also fit only a cylindrical outer surface of a plastic electric lamp socket holder, the outer reflector having a circular row of holes therein spaced a limited distance from said cylindrical extension and adapted to permit circulation of ambient air to and from the inner reflector and lamp socket holder to render the temperature of the outer reflector safe to human touch.

Abstract: A-C high-pressure discharge lamp and reflector combination assembly in which the reflector and the lamp are each separately and individually cemented into a base, but are not cemented together. Ventilation openings are formed between the lamp and the reflector in the base, to permit air to pass between the base and the lamp, and between the lamp and the reflector. Preferably, the reflector at the end remote from the base is surrounded with a ceramic end ring, at the inner circumference of which extends a metallic ribbon or strip which has radially extending connecting portions to the electrical terminals of the lamp, placed edgewise with respect to the light radiation to provide for essentially shadowless electrical connection and high-voltage insulation between the lamp terminals. Constructing the lamp as an a-c lamp permits lifetimes in the order of hundreds of hours for a lamp of comparable power and size with respect to d-c high-pressure lamps.

Abstract: A lamp holder that compensates for thermally induced expansion of an arcuate lamp is disclosed. Each end of the arcuate lamp is secured to a relatively flexable lamp support. In the preferred embodiment the lamp support at one end is moveable generally in a plane containing the arcuate lamp, while the lamp support at the other end is moveable generally in a plane that intersects the plane of the lamp. The resulting horizontal and vertical freedom of movement compensates for thermal expansion of the lamp during lamp operation. Both lamp supports are mounted on a lamp holder base, having a plurality of locator pin apertures therein that are cooperatively operative with locator pins positioned on the base of a lamp holder housing. The locator pins and locator pin apertures accurately position the arcuate lamp with respect to an optical system. Forced fluid cooling of the lamp is provided through the lamp holder housing.

Abstract: An extremely lightweight, high-intensity illumination device utilizing polymer optical fibers to transmit light from a remote light source, and having a head-supported frame of the eyeglass type, in which the fibers are terminated in two or more bundles to provide a converging light pattern with minimal shadow effects. The remote light source employs a combination of dielectric mirrors and a heat-resistant glass rod to filter substantially all heat-producing infrared radiation from the light emitted by the source.

Abstract: Composite high intensity discharge lamp constructions are described adapted for use in the recovery, in the form of heat, of energy in the non-visible frequencies emitted by such lamps. A transparent sleeve is disposed around and spaced from the lamp body being directly or indirectly connected thereto. Air passing between the sleeve and the lamp is brought into intimate heat transfer contact with both the outer surface of the lamp outer envelope and the inner surface of the sleeve.

Abstract: A high intensity running light fixture capable of submersion to substantial epths includes tungsten-halogen lamps housed in glass globe sealed to a heat dissipating base. The fixture avoids reduction in light transmittance of the globe by the improvement wherein a finned heat collector is disposed in the upper regions of the globe, with fins in close proximity to the inner surface thereof, and is connected by thermally conductive pillars to the base.

Abstract: A shutter system for stage-lighting spotlights includes a housing having a fixed framing gate therein which has an opening therethrough for the passage of light. Two sets of opposing shutter blades are sandwiched, one on each side of the framing gate, between the framing gate and one of a pair of pressure plates which have means urging them toward the framing gate. Each shutter blade has a neck portion which extends through a slot in the housing and which serves as a handle to which pressure may be applied to move the shutter blade. The blades are normally held in place by the action of the pressure plates against the blades and framing gate.

Abstract: A relatively high percentage of the light given off by a source lamp is gathered by four collector lens systems disposed around the lamp. The desired wavelength components of the light gathered by each lens system are directed by a dichroic mirror toward the system axis and into a respective focusing lens system, while longer wavelengths are transmitted by each mirror to a heat sink. The light from each focusing lens system is directed to the entrance face of a respective sub-bundle of a fiber optic combining system. The entrance face of each sub-bundle is inclined off axis to receive the incident light. The sub-bundles then bend and join each other in alignment with the system axis to transmit the combined light to a single exit face.

Abstract: A lamp changing module for totally enclosing a lamp when the module is withdrawn from a support such as an illuminator cabinet, and permitting exposure of the lamp when properly installed and connected to the support. A potentially explosive lamp is thereby contained within the module when it is removed so that even if it explodes it will not harm nearby personnel. It also protects personnel from burn hazards associated with lamp changing.

Abstract: Illumination system for photographic enlargers having a chamber mounted between the lamp and the negative aperture and consisting of heat-insulating, non-staining material of high light reflective and scattering power. In addition to the light entry and exit apertures, a further opening has a wall-segment inserted therein for cooling the mixing chamber and this wall segment consists of a material having a greater heat conductivity than the polyalkene foam.

Abstract: There is disclosed a light fixture having a ballast mounted on the housing thereof by means of a metal bracket having side walls which are connected to one another to form a corner and a base wall connected to each of the side walls intermediate their opposite ends. The side walls of the bracket are secured to adjacent metal side walls of the housing which are connected to one another at a corner thereof, and the ballast is releasably connected to the base wall of the bracket.