Abstract: A hydraulic jack for providing safety security is disclosed. The hydraulic jack comprises a hydraulic cylinder storing hydraulic fluid inside, and a piston installed in the hydraulic cylinder that is raised up from the hydraulic cylinder by a pressure of the hydraulic fluid stored in the hydraulic cylinder, thereby a heavyweight can be lifted by the piston. The piston has a drill hole on a body thereof that has a determined diameter and is perpendicular to the piston. When the piston is raised up, a safety pin is penetrable through the drill hole to secure the piston in place.

Abstract: A support system for photovoltaic mounting rails having a cylindrical base that rotates into a locked position.

Abstract: When a grommet provided with a wire insertion tubular portion is mounted in a through-hole of a vehicle body panel by engaging a vehicle body engagement recess on an outer periphery of the grommet with a peripheral edge of the through-hole, the present invention prevents the wire insertion tubular portion from being caught by the peripheral edge of the through-hole, bending toward the vehicle body engagement recess side, and being wedged in between the peripheral edge of the through-hole and the vehicle body engagement recess, and thus enables the grommet to be securely mounted in the through-hole. A rib is provided between an outer peripheral surface on a central axis line side of a wire insertion tubular portion and a peripheral wall of a central tubular portion in order to reinforce a base on the central axis line side of the wire insertion tubular portion.

Abstract: An electrically insulating cross-arm for a tower for high-voltage power networks. The cross-arm includes an insulating structural member for attachment to the tower body and to support a conductor cable. The insulating structural member comprises a solid rigid spine extending along a long axis having cross sectional profile, normal to the long axis, having a second moment of area of its cross sectional profile about every axis normal to the long axis and dissecting its centroid has a value of A2/2? or more, where A is the area of the cross sectional profile. The structural member provides resistance to bending and compressive buckling and allows conductors to be safely supported at reduced tower height. T and Y shaped cross sections provide water run-off and inhibition of organic growth. The structural members are also generally useful as insulator members in high voltage power networks.

Abstract: In a gas insulated electric apparatus having gas sections filled with insulating gas, a locating device determines a position of a gas section in which an insulation abnormality is detected, on the basis of a detection signal from sensors disposed in each of predetermined gas sections. At the same time a hindering degree diagnosing device diagnoses the degree and the kind of the insulation abnormality, by comparing a detection signal from the sensors with data stored in a data base. A valve control generates a valve control signal, responding to the locating device and the hindering degree diagnosing device, and in response to the valve control signal, a trip circuit generates a valve opening signal to open an electromagnetic valve disposed in a gas section in which an insulation abnormality is detected.

Abstract: Heat sinks extending rearward from and connected to the risers of a switchgear assembly by the same fasteners which secure the stabs to the risers dissipate the joule heat generated by current flow through the risers and stabs and accommodate for the higher temperature rise permitted in the power circuit breakers engaged by the stabs. The heat sinks are formed by a pair of heat sink members straddling the risers, each of which has an elongated flat body with an extended flat mounting surface on a first face which provides extended surface engagement with a stab. The elongated body projects rearward beyond the stab and a first set of transverse fins project from the first face rearward of the stab toward the first set of fins on the other heat sink member of the pair.

Abstract: An electronic device cooling arrangement includes a heat sink bonded to a substrate above a chip on the substrate, the heat sink having a mounting section bonded to the substrate, a face panel section suspended above the chip and defining a tapered center through hole, and a supporting frame section connected between the face panel section and the mounting section, and a tapered heat conductive block mounted in the tapered center through hole and bonded to the chip for quick dissipation of heat from the chip.

Abstract: A generator coil comprising a plurality of stacked windings, each winding comprising a length of copper having a generally rectangular cross-sectional shape, and including an upper surface, a lower surface and a pair of side edges, wherein a groove is formed in the upper surface extending substantially the entire length of the winding.

Abstract: An electrodeless light bulb assembly including a case or housing supporting an electrodeless light bulb as well as a convection type heat exchanger. A solid state RF driver circuit is located inside the housing and connects to an excitation coil wrapped around the light bulb. The excitation coil comprises a metal heat pipe so as to provide an efficient thermal transport mechanism for the heat generated by the coil and the heat radiated thereto from the electrodeless bulb to the heat exchanger in addition to generating an RF excitation field for the electrodeless light bulb.

Abstract: A gas filled electric conductor arrangement has an inclined surface (3A) at the bottom side of an electric conductor (3) that is formed by gradually reducing the cross section (D1, D2) of the electric conductor from one insulator spacer (2A) at one side toward another insulator spacer (2B) at the other side. Because of an angle (.theta.) of the inclined surface (3A), the spacing distance between the electric conductor (3) and the bottom surface (1A) of a grounded tank (1) increases depending upon the distance away from one insulator spacer (2A). Thereby, conductive foreign particles (50) are designed to be moved away from the surface of the insulator spacer (2A) and become trapped by a conductive foreign particle (1) disposed at the center bottom surface (1A) of the grounded tank.

Abstract: A three-phase electrical power line comprising a sealed tubular envelope of steel filled with insulating gas under pressure, e.g. nitrogen or carbon dioxide CO.sub.2, and having three conductive bars placed therein together with a thin tubular envelope of aluminum which is located between the steel envelope and the bars, wherein the conductive bars are held by collars made of non-magnetic material, having an outside diameter equal to the inside diameter of the aluminum tubular envelope, and possessing three radial arms which are screwed to tabs of insulating supports that enclose the conductive bars.

Abstract: An electrical conductor assembly includes a plurality of identical conductors having a longitudinal direction and a stacking direction perpendicular thereto. At least one insulating layer is to be inserted between each two respective conductors and stacked therewith in the stacking direction. Each of the conductors has two substantially flat main sides oriented perpendicular to the stacking direction and a maximum thickness in the stacking direction. Each of the conductors has at least one set of slots in succession approximately in the longitudinal direction. Each of the slots leads approximately in the stacking direction through a respective one of the conductors and has a sharp-edged mouth in each of the main sides.

Abstract: An isolated phase busbar installation has a closed circulatory cooling system in which a deionization device is interconnected between the tubular enclosures of two isolated phase busbars of the installation between which air is caused to flow. The deionization device comprises an open-ended metal tubular housing which is connected to earth and which has, extending transversely across the bore and dividing the bore throughout its length into a plurality of passages, a plurality of mutually spaced metal sheets. Each metal sheet has a plurality of transversely extending convolutions at spaced positions along the length of the housing so that each passage follows an undulating path.

Abstract: A switchboard for mounting and supplying electrical power to a plurality of circuit breakers. The switchboard comprises a frame including a center mounting pan, and at least first and second circuit breaker mounting pans for engaging and supporting the rear end portions of the circuit breakers. The switchboard also comprises a power stack assembly mounted on the center mounting pan of the frame. The power stack assembly includes first, second and third, substantially vertically disposed main bus bar members for being connected to a source of electrical power and for releasably engaging the circuit breakers. The first main bus bar member is selectively spaced from the center mounting pan with insulator members so as to define a first ventilation passageway therebetween. The second main bus bar member is selectively spaced from the first main bus bar member with insulator members so as to define a second ventilation passageway therebetween.

Abstract: An electronic circuit device includes a metallic member composed of a thermally and electrically conductive material and comprising a unitary mass defining a heatsink and being free of mechanical or electrical transition joints. Electronic switching devices are mounted on the member and in electrical and thermal contact therewith. A control circuit and a conductor are each mounted on the member and adjacent the switching circuit devices and electrical conductors interconnect the switching circuit devices with the control circuit. The control circuit and the conductor are thermally and electrically isolated from the metallic member. The metallic member comprises a heatsink for the electronic switching devices and a conductor for currents being switched thereby.

Abstract: A ballast connector is described for use with a ballast having windings, resistors, capacitors, etc. mounted therein. An internal connector housing is positioned in one end of the ballast case and has the various leads from the windings, resistors, capacitors, etc. extending outwardly through sockets provided in the internal connector housing. An external connector housing is selectively removably mounted on the ballast case and has its inner end adapted to be received by the outer end of the internal connector housing. A plurality of insulation displacement connectors are positioned in the external connector housing and have one end thereof connected to predetermined leads which extend through the socket in the internal connector housing. The leads are provided with detents on the opposite sides thereof which are received by V-shaped portions of the said one end of the insulation displacement connector. The outer ends of the insulation displacement connectors are electrically connected to service leads.

Abstract: A busbar is provided for current distribution systems such as busbar trunking systems, switchgear and the like. The busbar has a C-shaped cross section and walls which are not uniform in thickness. The walls which lie closest to one another in adjacently mounted busbars have a thickness which is greater than the thickness of the walls which lie parallel to the mounting surface onto which the busbars are mounted.

Abstract: A bus bar for power supply is comprised of a pipe-shaped outer conductor and at least one inner conductor inserted therein. The inner conductor is also formed in a pipe shape and serves as a coolant flow passage. Insulation is interposed between the outer conductor and the inner conductor to electrically isolate them from each other.

Abstract: An electric power bus removable joint includes three spacer-connectors that automatically align the intervening splice plates and insulative plates used to electrically connect between adjoining busway sections. The spacer-connectors automatically attach between the opposing joint face plates without requiring any additional fastening means.

Abstract: A bus bar and duct combination as is disclosed comprising a plurality of bus bars encased and held, at a central part between end joint parts of the bus bars, within a metal duct such that the bus bars, the duct and electrical insulation members are in intimate contact to provide heat transfer from the bus bars to the duct by way of conduction.

Abstract: An electric busway system consists of a plurality of planar bus bars insulated from each other and bolted together for good mechanical strength and for efficient thermal conductivity. The bus bars are additionally perforated to promote convective air current flow through the perforations when the bus bars are mounted in the horizontal plane.

Abstract: The heat sink bus assembly is adapted to be connected to a printed circuit board having conductor structure leading to conductive foil and printed circuit board mounting structure for physically mounting the printed circuit board components and conduct heat to an enclosure. The printed circuit board is adapted to be mounted in a partially sealed enclosure which is relatively highly thermally conductive. The bus assembly has physically secured thereto high heat generating devices and other devices adjacent to the printed circuit board, is energizable to selectively supply power to a portion of the devices secured thereto, and functions to dissipate heat generated by the high heat generating devices secured thereto by conducting the heat to an enclosure.

Abstract: A bus duct joint comprising a plurality of conductive links for joining the buses, a plurality of intervening insulators and a single pressure providing bolt passing through the links and the insulators and between the ends of the buses being joined to provide substantially uniform pressure on the surfaces of the buses. The intervening insulators align and retain the conductive links and locate the joint with respect to the buses.

Abstract: A two-piece extruded aluminum alloy housing is shaped to provide support and ground conduction facility to power busway conductors contained therein. The two-piece housing is attached together with snap-fit connectors along its top and bottom surfaces. The housing is attached to the busway power conductors by means of insulated bolts. The bolts may be hollow so that air can flow through the bolts to aid in cooling the conductors within the housing by convection.