Abstract: A pulse discharge site location (PDSL) system is provided which captures pulses on a conductor without requiring the triggering functions of an oscilloscope. The PDSL system comprises a pulse discharge measurement (PDM) system and is programmed to store the data captured by the PDM system in a reference buffer corresponding in size to the propagation time of a pulse along the length of the conductor. Samples of the captured pulses are scanned to locate the peaks of pulses above a selected noise level. These pulses are stored into a temporary working buffer, along with a selected number of samples, normalized and then added to the reference buffer. The reference buffer provides a statistical average of pulse activity. Primary pulses and their second and higher order reflections, as well as transient interference pulses and radio frequency interference, are indicated at the beginning and end of the reference buffer.

Abstract: A system for selectively providing power from a power source to a load to operate in an area for at least one occupant comprising a processing device for controlling the opening and closing of a relay connected between the load and the power source for energizing the load, and a sensor for detecting the presence of an occupant in the area. The processing device is programmable to close the relay in response to an output signal from the sensor for a period of time that can be of fixed duration, or a duration that is dynamically and automatically determined using sensor data relating to measured time between successive, detected occupant movements. In addition to a daylight inhibit function, the system is provided with color indicators and a tone generator to indicate various operating conditions and to guide a user entering selected system parameters, among other features.

Abstract: A fault detection device for an electrical distribution system employs a single arcing fault detection device which can be shared among a plurality of branch circuits. A scanning device is connected to the arcing fault detection device. A line conductor from each of the branch circuits is provided to the arcing fault detection device. A current transformer is provided for each branch circuit to monitor its line conductor and to provide an output signal to the scanning device. The scanning device polls each current transformer for an output signal for a selected number of cycles and provides the output signal to the arcing fault detection device. The arcing fault detection device analyzes the output signals and, upon detection of an arcing fault condition in a branch circuit, shunts the line conductor of that branch circuit to ground via a resistance to induce ground fault condition in the ground fault interrupting device for that branch circuit.

Abstract: A lighting fixture assembly includes a lighting fixture having a mounting member, a pair of end plates, an elongated lamp and an elongated lens, and a pair of dust covers fittable over opposite ends of the lighting fixture. Each end plate is mounted to one of the opposite end of the mounting member and is substantially comprised of a first material having a first coefficient of thermal expansion. The lamp is mounted adjacent to the mounting member and extends between the end plates and has opposite ends disposed adjacent to the end plates. The lens is mounted adjacent to the mounting member and extends between the end plates and has opposite ends disposed adjacent to the end plates. The lens together with the mounting member and end plates substantially encloses the lamp.

Abstract: A circuit box includes a housing having a front panel defining one surface of a circuit receiving chamber within the housing. A shelf is rigidly coupled to the housing and extends perpendicularly and outwardly from the housing. A lip extends substantially perpendicularly from an outer end of the shelf remote from the front panel and is substantially parallel to the front panel to define a cable receiving channel with the shelf and front panel. Cable tie wrap retainers can be located on the shelf and within the cable receiving channel.

Abstract: A receptacle assembly having a body and a hinged cover is provided to accept a plug with a threaded ring connector. The body has an open end, an exterior surface and a ridge formed on the exterior surface adjacent to the open end adapted to receive the threaded ring of the plug. The ridge of the body has at least one interruption and defines threads for engagement with the threaded ring on the plug. The hinged cover has an interior periphery and at least one protrusion formed on the interior periphery and alignable with the one interruption of the ridge and movable through the interruption and into an underlying position relative to the ridge such that the cover is securely fitted over the open end of and onto the body when the assembly is not in use by moving the cover toward the body followed by rotating the cover relative to the body.

Abstract: A structure for aligning a canopy for an exit sign with a standard wall-mounted electrical junction box. The structure is constituted of a separate plate which is adapted to be fastened to the back cover of an exit sign so as to form a mounting structure adapted for facilitating the attachment of the exit sign to a wall-mounted electrical junction box, and which incorporates slots adapted to be engaged by protuberances on the canopy for aligning the latter with the junction box in predetermined selective orientations.

Abstract: A pipeline buoyancy control assembly includes a pair of anchor rods, a pair of tie-down attachment members, a pair of termination members, and a flexible endless strap having an endless loop configuration. The anchor rods are driven partially into the ground along opposite lateral sides of the pipeline. The tie-down attachment members are disposed on and mounted to upper end portions of the anchor rods with each tie-down attachment member having a tubular mounting body defining an axial passageway through which the upper end portion of one anchor rod extends and a retainer body disposed in an oblique relation and attached to the tubular mounting body. Each termination member is mounted to the upper end portion of one of the anchor rods. The endless strap has opposite portions secured to the tie-down attachment members and main portions laid over a top of and disposed in a substantially transverse relation to the pipeline and extending between and attached to the opposite portions.

Abstract: A device for deflecting ladders and other moving structures away from sensitive and readily damageable stationary equipment. More particularly, disclosed is a device in the form of a wedge-shaped ramp structure which is mounted at the end of a guard rail located at the bottom of the stationary equipment which is arranged in an uneven lineup and presenting protruding end edges which the ramp structure will prevent from being struck by moving aisle ladders or the like through deflecting the latter. Pursuant to a specific aspect, the device is a wedge-shaped deflector ramp structure mounted at the end of the guard rail which is located to extend along the lower end of a forward surface of unequal flange cable duct (UFCD) racks which are frequently employed in telephone or communication equipment central offices.

Abstract: A wiring device incorporating contrasting areas for having electrical circuit-identifying indicia or legends written thereon, and more particularly, a wiring device incorporating means for identifying diverse electrical circuitry through the application onto the device of indicia or legends written on a surface of preferably contrasting colors. Furthermore, disclosed is a method of imparting through imprinting color contrasting areas for the writing thereon of indicia or legends to a wiring device for the purpose of being able to identify at least one electrical circuit which is a plurality of electrical circuits which are connected to the wiring device.

Abstract: An ignitor and ignitor monitoring device is provided which is externally and detachably mounted to a high intensity discharge (HID) luminaire. The ignitor monitoring device provides a visual indication of whether or not the ignitor of the lamp in the HID luminaire is functioning. If the lamp is not on and the indicator is activated, sufficient open circuit voltage is present to operate the ignitor, the ballast in the luminaire is most likely functioning properly, and power is present to operate the luminaire. A service person can assume that the lamp is defective and can replace the lamp as a first attempt to correct the problem with the luminaire. If the lamp is off and the indicator is also not operating, the luminaire is not operating for any of a number of reasons such as a defective ignitor, a defective ballast capacitor, a defective lamp or loss of supply voltage from the power source. A service person can replace the ignitor in a first attempt to repair the luminaire.

Abstract: A sheet metal housing for an HID luminaire which comprises a two piece, fold-up sheet metal housing which provides exceptional strength with minimal usage of materials to support a very heavy ballast therein. The sheet metal housing is suitable for a low cost highbay luminaire with high watt ballasts for Metal Halide and High Pressure Sodium, Mercury Vapor (HID) light sources. The sheet metal housing provides reflector adjustability for different size lamps and light centers. A top sheet metal stamping defines a central ballast shelf on which a ballast is mounted, and first and second ends of the top stamping are bent 90.degree. on opposite sides of the central ballast shelf. The first and second ends of the top stamping are further bent back 180.degree. upon themselves to form a double wall. The first and second ends of the top stamping are further bent 90.degree. to project towards each other.

Abstract: A shelf apparatus, adaptable for supporting a computer keyboard, which is retractable into a storage compartment and can swivel and move in direction transverse to the direction of retraction, such that the orientation and position of the shelf can be changed freely when the shelf is extended out from the storage compartment. The shelf apparatus includes a shelf that is pivotally coupled to a support shelf that is retractable into the storage compartment. Alternatively, the shelf apparatus can include a shelf that is pivotally coupled to extensions which are pivotally coupled to each other and to a support inside the storage compartment. A clamp or cover is further provided which secures to the apparatus the cable which couples the computer keyboard to the computer.

Abstract: A lighting control system for discharge lamps which comprises a ballast for supplying energy from a power source to a lamp. First and second capacitors and a first control relay and contact set control the supply of energy from the ballast to the lamp to switch the lamp between dimmed and normal wattage operational modes. A second control relay and contact set connects a single output control wire to neutral when a predetermined condition is sensed or a switch is thrown. The first control relay, which is connected at one end to the lamp ballast, is energized when the other end thereof is connected to neutral via the second control relay. The first control relay in turn closes the normally open contact set, which is connected to one of the capacitors, to increase the energy provided to the lamp. In accordance with one embodiment the first capacitor and the contact set of the first control relay are connected in series, and together are connected parallel to the second capacitor.

Abstract: A fire-rated, poke-through floor fitting preferably for use in a three inch diameter bore within a floor. The fitting has an electrical receptacle that is sized to fit within the three inch bore. The receptacle preferably has two pairs of electrical outlets coupled to the electrical receptacle along with four voice/data jacks. The fitting provides a high number of electrical outlets and voice/data jacks, while maintaining a relatively low profile and easy accessibility. Each pair of electrical outlets can be separately connected to different power sources or each pair can be connected to the same power source.

Abstract: A four-sided ground contact assembly for use in an electrical receptacle includes a first contact element and a second contact element. Each of the first and second contact elements is mounted to a mounting bridge of the electrical receptacle. The first contact element has a pair of opposing contact leg portions and a base portion. The second contact element has a pair of opposing contact leg portions and a base portion The leg portions of the first and second contact elements are circumferentially spaced from one another and provide four points of contact on four sides of a ground pin of an electrical plug. The base portion of the first contact element is integral with the mounting bridge and the base portion of the second contact element is disposed above and fastened to the base portion of the first contact element and thus to the mounting bridge.

Abstract: An electrical box and a holding device for use therewith is disclosed. The holding device can be a flexible plastic bag-like container having a first wall coupled to a second wall and forming a substantially enclosed inner receiving area. A mounting fastener such as fan or fixture mounting screws are temporarily secured within the receiving area of the container. A box mounting screw extends completely through the container and extends through a side of the electrical box to temporarily secure the container and the electrical box to a structure; such as a joist. The fan or fixture mounting screws are then accessible for removal from the container and can be used to further fix the electrical box and the fan or fixture to the joist. The electrical box also has a pair of slots for receiving the fan or fixture mounting screws. Each slot has two areas for receiving a screw with a knockout between the areas. The knockout can be removed if the screw must be positioned between the two areas.

Abstract: A rotary coupling apparatus includes a stationary housing defining a chamber, an elongated hollow shaft extending through the chamber of the housing and rotatable relative thereto, a drum supported about the shaft and rotatable therewith, and an elongated coupling cable for carrying communications elements being disposed in the chamber and interconnecting the stationary housing with the rotatable drum. The stationary housing has a pair of spaced end walls and a circumferential side wall disposed therebetween. The end walls define the chamber therebetween and the circumferential side wall defines an outer periphery of the chamber. The shaft extends through the chamber between the end walls and is mounted to undergo rotation relative to the end walls. The circumferential side wall is radially spaced outwardly from and extends about the rotatable shaft and drum.

Abstract: An electrical box for supporting ceiling fans, the electrical box has a top portion and a side portion extending completely around the top portion and extending substantially perpendicularly to the top portion. The top portion has a substantially planar lower surface, and the side portion has two oppositely spaced tabs extending inwardly toward each other. Each of the tabs has an opening extending completely therethrough. At least one mounting hole is formed in either the top portion or the side portion or the corner formed between the top and side portions. The mounting hole or holes each have a hole axis inclined with respect to the lower surface of the top portion. Each mounting hole extends completely through the wall between an inner cavity of the electrical box and an area outside the wall. The electrical box can have various mounting brackets attached thereto for securing the electrical box to a support member such as a joist or a truss.

Abstract: An electrical connector has a connector body with a cable cavity at its cable connection end and a strain relief coupled to the connector body adjacent the cable connection end. The strain relief extends into the cable cavity. A wire spacer is mounted in the cable cavity adjacent to strain relief. This spacer has a central core and four radially outwardly projecting flanges. The flanges are angular spaced from one another by angles of substantially 90 degrees. The spacer maintains separation of twisted wired pairs in a cable which is secured to the connector by the strain relief to enhance the electrical performance of the connector.