Abstract:
A lighting fixture having a new and improved sensor housing and an adjustable mast arm. The sensor housing includes a top wall, a bottom wall, a back wall having a first lead aperture for establishing electrical and mechanical connections between a proximity sensor and a source of electrical power, a transition wall, a pair of side walls, and at least one drain aperture located between the transition wall and the bottom wall. A first partition wall is located between the bottom wall and the transition wall. The first partition wall extends between the pair of side walls to form a cavity including at least one drain aperture for preventing the accumulation of water in the sensor housing. An adjustable mast arm is connected between the base and the sensor housing. The adjustable mast arm includes a first pivot joint attached between the base and one end of the arm, a second pivot joint attached between the sensor housing and the other end of the arm, and a swivel joint located between the first and second pivot joints.
Abstract:
In this luminaire, there is a dome-shaped reflector having a top, a bottom, and a central axis on which a light source is adapted to be positioned. A metal wall of the reflector has an inner surface extending about the central axis and defining a bottom opening through which the inner surface reflects light received from the source. The angular distribution about the central axis of the light reflected from the inner surface through the bottom opening is controlled by many elongated facets on the inner surface extending in a top-to-bottom direction with respect to the reflector. The facets are arranged about the central axis in side-by-side relationship, with juxtaposed facets being at an angle with respect to each other so as to form alternating ridges and grooves between juxtaposed facets. The individual ridges, when viewed in transverse cross-section, each include two of the facets intersecting at an apex that is located on a reference line for each ridge extending radially outward from said central axis. The individual ridges that are located in predetermined sectors of the inner surface each have one of its two facets disposed at a much smaller angle with respect to its reference line than the other of the two facets so that this ridge is highly bilaterally asymmetrical with respect to said reference line.
Abstract:
Luminaires, floodlights and spotlights having a light shield comprised of a flexible material are disclosed. The flexible light shield has a slit in its majority and presents a low wind loading factor when used for a high mast luminaire that is subjected to wind speeds from 60 to 100 miles per hour typically experienced in storms or hurricanes. The flexible light shield is readily adapted to meet the light distribution needs of various other lighting units.
Abstract:
A high intensity discharge metal vapor lamp comprising an arc tube having an inner chamber vented to the arc tube and disposed therein is disclosed. The combination of the arc tube and inner chamber being of a double wall construction confines the arc condition occurring between thermionic electrodes to be within the inner chamber. The inner chamber is operated at an increased wall temperature, relative to a conventional arc tube, while at the same time reducing the typically experienced sodium losses that normally occur for increased wall temperature operation. Ceramic evaporation at elevated temperatures from the inner chamber can be rendered innocuous by deposition on a similar material utilized in the arc tube. The characteristics of the arc tube allows for improved methods of its operation such as a pulsed operation at a relatively high rate of 1 to 20 KHz so as to achieve a relatively high color temperature. If desired, the arc tube may be operated in a d.c. mode while at the same time reducing the tendancy of separation between the sodium and mercury fill contained with the arc tube typically occurring for such d.c. operation.
Abstract:
Electrical ballast circuit of improved power factor for operating gaseous discharge lamps. Two discharge lamps are respectively connected to two inductively coupled induction coils for obtaining high power factor without the use of capacitors.
Abstract:
A cover plate is designed for use in either wall mounting or ceiling mounting applications. The cover plate comprises a base forming a base plane for mounting said plate flush against a support surface. A main body is connected to the base and has a generally flat mounting surface disposed in the plane parallel to the base and a sloped mounting surface inclined with respect to the base plane. A pair of first mounting holes are formed in the flat mounting surface which have an axis substantially perpendicular to the base plane. A pair of second mounting holes are formed in the sloped mounting surface and have an axis disposed at an angle with respect to the base plane. In ceiling mounting applications, lighting fixtures are received in the first mounting holes. Conversely, in wall mounting applications, the lighting fixtures are received in the second mounting holes.
Abstract:
This quartz-halogen floodlight includes mounting means that is so constructed that the light-aiming angle of the floodlight can be adjusted both horizontally and vertically without disturbing the normal horizontal disposition of the quartz-halogen lamp within the floodlight.
Abstract:
In an industrial luminaire having an acrylic reflector for directing light output in a desired pattern, and in which a high wattage light source is utilized, a cooling sleeve constructed of a light transmissive material is mounted in surrounding proximity to the light source. The cooling sleeve is cylindrically shaped with at least one opening through which heat generated by the light source can be channeled away from the acrylic reflector in a chimney like manner. The cooling effect of the sleeve is further supplemented by the ability to pass a flow of air within the reflector, around the cooling sleeve, and through a space formed between the reflector and the cooling sleeve. A venting arrangement can be formed in the housing or other support structure on which the reflector, light source and cooling sleeve are mounted.
Abstract:
This luminaire comprises a generally dome-shaped main reflector having a bottom opening and a top opening and a lamp within the main reflector defining a light source located between the top and bottom openings. This main reflector, when mounted in a location above a warehouse aisle, is adapted to illuminate stacked material along both edges of the aisle with light passing through the bottom opening. Positioned above the top opening are auxiliary reflectors for receiving light from the source passing through the top opening and for reflecting such light to the edges of the aisle onto regions of the stacked material that are poorly illuminated by light passing through the bottom opening.
Abstract:
Coil bobbins are disclosed having flanged coil support portions provided with outboard terminal housings projecting beyond the flange rim and defining inwardly extending terminal-receiving cavities. The end walls of the housings are slotted to allow a wire to pass through the cavity in a circumferential direction relative to the winding axis in similar fashion to a turn of coiling. Bifurcated terminals pressed into the cavities in straddling relationship to the wire provide connections to the coil.A double bobbin has twin flanged coil support portions with bridging sections maintaining their physical separation. Terminal housings are provided on the bridging sections allowing wire to be first wound into a coil on one support portion, guided across the bridging section and passed through the cavity in a terminal housing, and then wound into a coil on the other support portion, all without interruption.