Abstract: A sleeve head for a cable sleeve has a plurality of conically-shaped cable introduction openings which are divided in a longitudinal direction and receive conical seal elements. The sleeve head is composed of a central part and a corresponding annular part, wherein each of the cable introduction openings are arranged in a parting surface between the two parts. The parting line between the central part and the annular part can, for example, be carried out in a polygon shape with the cable introduction openings being arranged in the corners of this shape. Expediently, a single coherent-shaped seal part is employed which has both annular seal elements for each of the cable introduction openings and a sealing insert that extends between the cable introduction openings.

Abstract: An electrical cable holding case that can prevent a charged resin material for sealing from cracking by blocking the sharp bending of electrical cables when they are taken out of the case is provided. An electrical cable holding case includes a cylindrical case main body and a lid-like rear holder having electrical insertion holes and resin charging holes. Electrical cables taken out of the case main body via the electrical cable insertion hole of the rear holder are embedded by resin molding from the case main body to the outer surface of the rear holder to hold the electrical cables so as to be watertight. Electrical cable support walls are arranged at the edges of the electrical cable insertion holes outside the rear holder.

Abstract: A bushing wherein the voltage stress across the surface of the bushing is alleviated by placement of a layer of insulating material in direct contact with the surface. The insulating material is preferably a high-voltage type, heat-shrinkable, halogen-free polyolefin, and is preferably fully shrunk to conform to the contours of the outer surface of the bushing.

Abstract: The invention is to a header for a power semiconductor device and a method for making the header. A ground pin is mounted or formed on the header mounting base and a header ground lead is placed over the ground pin and fused to the pin by a laser beam.

Abstract: The invention refers to a height and azimuth alignment adjustments assembly which is utilized for the precise and simplified adjusting of the heights of embedded containers and for the aligning of its light fixture with respect to a straight line. These containers are installed in airport runways, taxiways and other aircraft traffic areas to serve as bases for lighting fixtures, transformer housings and junction boxes. The adjustments take place both, when the containers and their lights are initially installed as well as when the runways, taxiways and other aircraft traffic areas are resurfaced.

Abstract: An electrical junction box for swimming pool light fixtures includes a base plate and a cover member. The base plate includes plural lower conduit bosses and sockets in an array for sealingly receiving polymeric electrical conduits. The sockets are configured to singularly provide all necessary support to the junction box as installed. A grounding and bonding member is carried by the base plate within the junction box, and is configured in coordination with the array of conduit sockets to assist in organizing electrical wiring within the junction box. A strain relief structure is arranged adjacent to each conduit socket to centralize or group the wires brought into the junction box, while the grounding and bonding member (and an external bonding wire connection feature as well) provides unprecedented convenience of termination for the centralized or grouped wire connections.

Abstract: A metal fitting for a composite electrical insulator (1) including a plastic rod (2), e.g., an FRP rod. The metal fitting (4) includes a radially inwardly deformable sleeve portion having a bore (5) into which an end portion of the rod (1) can be inserted for fixedly securing the metal fitting (4) to the rod (1). The bore (5) in the metal fitting (4) has an inner surface which is formed with fine protrusions (7). These protrusions (7) provide a satisfactory resistivity to the tensile force applied to the insulator (1), to thereby effectively prevent withdrawal of the rod (2) from the metal fitting (4) when it is in use.

Abstract: According to the present invention a one-piece molded strain relief structure for an electrical conductor is provided which includes a body portion having a tortuous path directly molded therein for receiving and guiding the conductor. The tortuous path includes an entrance and exit and further includes at least two changes in direction therealong. In a preferred embodiment the tortuous path is substantially S-shaped and is adapted to receive an electrical conductor having a flat cross section. The tortuous path is configured to confine the flat electrical conductor in a first orientation adjacent the entrance thereof and to cause twisting of the conductor to a second orientation angularly disposed from the first orientation as it approaches the exit thereof. A guide is provided adjacent the exit for imparting a sharp bend in the conductor as it passes therefrom.

Abstract: The connector permits wires to be used to conduct signals through a fluid-tight boundary. The wire sheath is removed around a medial portion of the wire to expose the surface of the inner conductor. A sealing material contacts the inner conductor surface and also the adjacent sheath surfaces, thereby defining a serpentine boundary which inhibits fluid leakage along the wire surface. The connector is secured to a circuit board which simplifies the assembly of the connector into a blind aperture. A biasing member disposed between the connector and the circuit board operates to hold the connector within the aperture.

Abstract: A tank for an oil-filled, pad-mounted electrical transformer includes six sides. The tank includes a front plate and a side panel unit connected to the front plate. The side panel unit is formed of a bent sheet of metal. Two of the side panels form obtuse included angles with adjoining side panels. A floor plate of the tank is sized to fit inside of the side panel unit so as to be capable of being secured at any desired elevation. The floor plate includes reinforcing channels.

Abstract: A generally rectangular plastic switch housing has locating tabs that position a U-shaped hardened steel grounding strap on the housing so that the strap and housing can be conveniently mounted from the front of a panel in a panel opening that includes relieved and upset portions designed to make electrical contact with serrated segments of the U-shaped strap's legs. The base of the U-shaped strap has an opening with upset edges designed to make electrical contact with the center terminal in the bottom wall of the switch housing.

Abstract: A feedthrough extending through the wall of an enclosure includes a body portion having a stem portion extending through the wall and a head portion abutting against the wall. The feedthrough assembly further includes a seal member and a biasing member to bias at least a portion of the head against the seal member. The body portion may be conductive, to form an electric current path through the wall of the enclosure, or may form a non-conductive passage to route a feed member, such as an optic cable, or tubular gas or liquid supply conduits, into the enclosure.

Abstract: The present invention is relates to a high strength solid insulator, and a method of manufacturing the same. The solid insulator is made of cristobalite porcelain containing cristobalite crystals in an amount of less than 10%, in which internal strain in the direction of compression in a columnar insulator body is larger in the diametrically outer portion thereof than in the diametrically inner portion thereof, and the difference Y in internal strain between the outer peripheral portion and diametrically central portion of the insulator body is defined by Y.gtoreq.(1.76.times.10.sup.-6) X, wherein X (mm) represents the diameter of the insulator body. The method of manufacturing the solid insulator is characterized in that a sintered insulator body is quenched to increase the difference in internal strain between the inner and outer portions of the insulator body.

Abstract: An insulating housing for mounting in a mating female connector housing of an electrical connector, whereby the insulating housing is a two-piece construction including a housing member which receives a cover therein. The cover comprises a strain relief member which, in a preferred embodiment, is integrally formed as part of the cover and which comprises a plurality of teeth. When the cover is mounted in the insulating housing, the strain relief member may be pivoted from an unlocked to a locked position, whereupon the plurality of teeth bite into the insulation of the insulated wires, thereby relieving strain on the insulated wires.

Abstract: A polymer electric device including a conductor and an electrically insulating polymer layer in contact with the conductor, wherein the electrically insulating polymer layer is a self-recovering and electrically insulating polymer layer which chemically reacts under the electric field of the conductor and recovers the electrically insulating properties of the polymer layer in the vicinity of the conductor which deteriorate with time.

Abstract: A wire retaining for connecting wires in low-voltage circuits of electrical apparatus has a continuous channel (5), formed on a shaped part, for receiving the wires. The channel is designed for the passage through it over its length of a wire placement tool protruding through its lateral wire insertion opening and moving in the longitudinal direction of the wire; legs (3) laterally defining the channel, and/or wire hold-back devices (7), are embodied as predominantly spring-elastically yielding to the tool passing through.

Abstract: The invention is directed to a cable introduction seal, having a conically fashioned annular seal of elastic material pressed against the likewise conically fashioned introduction opening. The pressing of the annular seal ensues with the assistance of a pressure element in axial direction. The annular seal is preferably provided with a longitudinally proceeding slot, so that it can also be employed on uncut cables.

Abstract: The connector permits wires to be used to conduct signals through a fluid-tight boundary. The wire sheath is removed around a medial portion of the wire to expose the surface of the inner conductor. A sealing material contacts the inner conductor surface and also the adjacent sheath surfaces, thereby defining a serpentine boundary which inhibits fluid leakage along the wire surface.

Abstract: A hermetic terminal assembly structure adapted to be sealed along the periphery of an aperture in a chamber defining housing wall of a hermetically sealed chamber including a terminal pin sealed by a coalescent aperture seal in the aperture to include inner and outer pin portions, each of which pin portions is surrounded by one of a pair of sleeve members sealingly cooperative with the aperture seal.

Abstract: A series connected capacitive graded high voltage cable terminator and suspension insulator made up of a number of individual modules each made by molding an insulating material between and around two flat, parallel plates molded of conductive material. The modules are connected in series by stacking them and the cable shield is introduced at one end while the bare conductor emerges from the stack cap. The electrical stress is uniformly divided by the number of capacitors in the series. The stack can also be used to suspend a bare high voltage conductor from a grounded tower.