Abstract: A cable management system for directing cables connected to the back of an equipment enclosure of the type containing a computer peripheral device or other electronics apparatus to enter and exit the equipment enclosure at a selected one of a plurality of predetermined orientations. A bottom cover of the equipment enclosure is provided with a recessed portion including a vertical wall upon which is mounted receptacles for receiving cable terminations. Upper stanchion portions at the rear of the recessed portion together with a hinged plate or with lower stanchion portions contacting the upper stanchion portions from the bottom form rear legs for the equipment enclosure. The rear legs and the vertical wall of the recessed portion confine cable entry and exit positions to particular angular segments corresponding to the sides and rear of the equipment enclosure.

Abstract: An end clip for attachment to the ends of finite strips of mesh-clad RFI/EMI shielding strips. A clip attachment is formed of a thin strip of metal, such as stainless steel, with hook-like flanges at opposite ends for securement to the edge margins of a mounting strip member of U-shaped cross section. The clip passes over the top of and partially compresses the end extremity of a tubular mesh-clad core strip mounted on the U-shaped strip. The end clip not only improves the appearance of the shielding strip end, but prevents possible snagging of the exposed tube end during use. A pointed tab, pressed out of the clip material, penetrates the core strip and resists accidental removal of the clip.

Abstract: A busbar corner housing includes outer and inner side walls secured to one another through flanges spaced from the corner bend. This leaves opposed openings that are substantially closed by plate-like corner covers. Each corner cover has a channel that conforms to the configuration of the outer and inner side walls and engages and abuts against the side walls. Each corner cover also includes a passage through which silicone caulking material can be forced to fill the spaces under the corner covers with caulking material, with excess caulking material being extruded out of sliver gaps between the corner covers and side walls to fill the sliver gaps and seal the housing against intrusion of moisture.

Abstract: A new bus bar circuit board structure is provided. The structure comprises insulation substrates and a plurality of bus bars arranged on the insulation substrates parallelly with each other. The respective substrates have an edge portion and each bus bar has a portion bend erected from the respective substrate along the edge portion thereof to form frame-shaped gate portions, each frame-shaped gate portion being within another frame-shaped gate portion and separated therefrom by way of a gap when developed in plan view.

Abstract: Disclosed is a bundled strands protector of a type of a U-shaped housing. The protector comprises a partition member upstanding from the bottom wall of the housing, a locking member provided on the free end of the partition member, and a retaining member hinged to one of the side walls of the housing and releasably engageable with the other side wall, the retaining member being provided with an engaging hole engageable with the locking member.

Abstract: A riser assembly of rigid conduit is provided for an electrical cable which is adjustable. The riser assembly includes first and second rigid conduits having a telescoping interconnection at an elongated enlarged diameter lower end of the second conduit. This permits the upper end of the second conduit to be connected by a threaded fitting to a meter box and to have the lower end of the first conduit extend below grade to receive an electrical cable. Settling of the ground or thermal expansion is readily accommodated by the telescoping adjustment without any strain on the threaded fitting connection to the meter box.

Abstract: A yieldably extensible, self-retracting cable comprises a flexible center conductor surrounded by a primary dielectric material with a flexible wire shield exterior thereof and a thermoplastic or thermosetting elastomeric outer jacket formed permanently in a helical shape. The primary dielectric insulation comprises materials such as polymeric fluorocarbon or irradiated polyethylene having an exceptionally low dielectric constant. The low dielectric constant is maintained despite the permanently coiled configuration of the cable by ensuring that the plasticizing or curing temperature of the jacket is less than the melting or other degradation temperature of the dielectric material, and by utilizing unbraided wire shielding comprising a pair of concentric layers of wire wound helically in mutually-opposite directions to avoid mechanical injury of the dielectric material.

Abstract: A grounding electrode which is automatically moisturized from a solar powered humidifier that produces the required moisture through solar radiation to which it and its component parts are exposed. The generation of moisture is therefore a function of the available sunlight, the thereby radiated heat and the soil dryness. A unit operating on utility power is also described.

Abstract: A sealing element is provided for use on insulated flat cables which comprises an elongated body of resilient material having an orifice extending longitudinally within said body. The orifice has a width greater than its height. Opposed involute walls extend within said orifice substantially along the width of the orifice whereby the involute walls stretch and conform to the opposed substantially flat parallel major surfaces of the flat cable when placed thereon, thus providing a secure, watertight interference fit. Depending upon usage, the orifice may extend through the body or terminate within the body. Additionally, it is preferred that sealing rings be formed in the inner wall of the orifice.

Abstract: The invention features a strain relief device for mounting wires and cable into a panel. The body of the device carrying the cable is flexible and attached to the panel by a rotational motion. The panel is locked between two flanges of the body by a number of locking ramps that bias one of the flanges into locking engagement with the panel.

Abstract: A wiring enclosure is formed as an elongated extended plastic extrusion having a rectangular cross section. The enclosure includes a U-shaped base with a cover connected by a thin flexible hinge portion. The outer edge of the cover has a depending lip releasably mating with a corresponding shaped locking recess. A pair of locking walls are integrally formed on the interior of the opposite sidewalls of the base and project inwardly to define a locking channel with the bottom wall. A locking tab is pressed into locking channels and releasably interconnects enclosures. Mounting elements are secured to the bottom wall. Alternatively, other securements can be used such as adhesive pads, Velcro attachment units or the like.

Abstract: A device for spacing boards, like printed circuit boards, or a board and a mounting surface, like an electronic device chassis, a fixed distance apart. The device is constructed to interlock with other such devices so that boards mounted with these devices may be stacked. A peg-and-notch coupling provides horizontal stability, while a bottom anchor and top latch secure the lower and upper boards, respectively, providing stable vertical stacking.

Abstract: The invention relates to interruption of screens of power cables (1,2) with double stress cone systems (23,30). Such interruption systems have hitherto always been made at the same place as the cable core joints. However, with interruption systems at the location of the cable core joint, undesirable gas pockets can form at the interface between the joint insulation and the double stress cone system. In order to eliminate this problem, the interruption system is provided at a position remote from the cable core joint.

Abstract: An improved standoff for use in assembly of an electronics device includes a generally cylindrical body with a bore hole through the longitudinal axis. A plurality of reinforcing fin-shaped members disposed radially about the outer surface provide additional rigidity to the structure as well as providing surfaces at each end of the standoff upon which circuit boards may rest. A plurality of clips may be moved under compression and passed through holes on a circuit board. Once they have passed through, they will elastically return to their normal position thus loosely, but securely, holding the circuit boards together. This allows the standoffs to hold the circuit boards together, without the use of additional nuts and bolts and conventional spacers, and also allows the passing of final assembly screws through the longitudinally bore of the spacer.

Abstract: An electrical cable includes an elongated conduit with a plurality of electrical conductors therein. Each of the conductors is provided with a perforated polyurethane sheath thus providing electrical insulation among the electrical conductors. The conduit is also formed of polyurethane and is a double walled conduit. The exterior surface of the conduit is provided with longitudinal grooves or channels and the interior wall of the conduit is provided with longitudinal grooves or channels. These channels facilitate flexing of the cable. Coolant may be provided interiorly of the group of conductors and between the conductors and the inner wall of the conduit. The perforations in the polyurethane sheaths facilitate cooling. A metal collar is crimped at the end of the cable to prevent leakage of the coolant fluid and for attaching the conduit to a terminal connector. The cable is particularly useful in conjunction with a welding device.

Abstract: An electric transmission conductor support insulator made of plastic material for mounting on the top of a utility pole basically includes an elongated cylindrical body having a top end and a bottom end, a longitudinal bore within the body extending through the bottom end and tapering inwardly toward the top end, at least one circular ledge extending laterally from the body. The ledge has an upper surface, a lower surface and a side surface, the upper and lower surfaces are positioned normal to the longitudinal axis of the body, the lower surface being larger in diameter than the upper surface with the side surface sloping inwardly toward the body from the lower surface to the upper surface, and there is a circular notch in the side of the body juxtaposed above the ledge which notch is sized to admit a substantial portion of a conductor to be supported by the insulator.

Abstract: A heat shrinkable strain relief device protects electrical wires passing through an aperture in a partition and secures the wires to the partition. The strain relief includes a first heat shrunk tube overlying the wires and having a diameter that is no larger than the diameter of the aperture. A second heat shrunk tube overlying a portion of the first heat shrunk tube has an outer diameter greater than that of the aperture. The strain relief is located in the partition with only a length of first heat shrunk tube that extends outward from the second heat shrunk tube passing through the aperture. A third optional heat shrunk tube positioned on the first heat shrunk tube is spaced apart from the second tube by a distance approximately equal to the thickness of the partition. The strain relief device is formed by locating lenghts of heat shrinkable tubing in predetermined positions on the wires, and applying heat.

Abstract: A high voltage bushing is formed from a plurality of insulating layers. Conductive layers are interleaved with the insulating layers, and are electrically insulated from each other. The ends of the conductive layers are overlapped by stress grading layers, to minimize the electrical stress on the bushing.

Abstract: Alignment apparatus for receiving, aligning and retaining the pin connectors of an electronic component package in predetermined relationship is used to maintain proper alignment of the pin connectors with preformed holes or mounting pads on a printed circuit board or the like when the sub-assembly of a heat sink and an electronic component package is mounted on a printed circuit board or the like.

Abstract: The invention provides an electrical insulator comprising a cylindrical core (2) of an insulating refractory material, such as porcelain, onto a portion of the curved surface of which a sleeve (8) of insulating polymeric material is fitted. Metal end-caps (4), for electrically connecting the insulator, are fitted to the ends of the porcelain core such that there is an exposed portion (10) of the curved surface of the core between the sleeve and each end-cap. Thus, any damaging electrical activity which takes place at the metal end-caps is directed primarily onto the surface of the porcelain core (2), and not onto the surface of the electrically vulnerable polymeric sleeve (8), which serves to protect mechanically the relatively brittle porcelain core. Optionally, the polymeric sleeve (8) may have a convoluted or a shedded outer surface (12) to increase the leakage path length of the insulator, or to prevent the formation of a continuous moisture path, or both.