Abstract: End moldings for high-voltage cables are described wherein the dielectric insulator of the cable is heated and molded to conform to a desired shape. As a consequence, high quality substantially bubble-free cable connectors suitable for mating to premanufactured fittings are made. Disclosed is a method for making the cable connectors either in the field or in a factory, molds suitable for use with the method, and the molded cable connectors, themselves.

Abstract: An electric wire 10 is provided with a shielding layer 12 inside an outer sheath 11, three insulated wires 13 being provided therein. A correcting ring 46 is inserted between the outer sheath 11 and the shielding layer 12 of the electric wire 10, correcting the outer sheath 11 into a circular shape. A waterproofing ring 39 is attached tightly to an outer peripheral face of the outer sheath 11. In this way, even in the case where the shape of the outer sheath 11 of the electric wire 10 provided with a plurality of insulated wire cores 13 tends to be unstable, the electric wire 10 can be maintained in a specified shape by the correcting ring 46. Consequently the waterproofing ring 39 can fit stably and tightly to the outer peripheral face of the electric wire 10, thereby improving the waterproofing function.

Abstract: A fiber optic cable guide has a curved elongated member that fits between the strain relief boot and optical fiber to allow the fiber optical cable to bend without violating the minimum bend radius of the optical fibers. The fiber optic cable guide also retains at least a portion of the fiber optic cable.

Abstract: A seal for sealing between a cable and a casing enclosing part of the cable includes a wall member having a plurality of substantially concentric removable portions which may selectively removed to provide a cable aperture of required diameter through the wall member. The seal also includes sealing material retained by the wall member, which seals, in use, around a cable extending through the cable aperture in the wall member. When a removable portion of the wall member is removed, a corresponding portion of the sealing material is also removed, thereby providing a cable aperture of the required diameter through the sealing material.

Abstract: A cable probe is provided which can be installed without special tools, in which the fixing of the cable (3) is achieved by tensile forces acting on the cable (3), and in which the cable (3) can be shortened by the customer to a length corresponding to requirements. It has a cable fixing device which has a member (4) with an axial, conical internal bore (41) tapering in the direction away from the housing. Arranged in the member (4) is a cone (5) tapering in the direction away from the housing, which tightly encloses the cable (3) and can be displaced thereon only by an external force, and which has an axial cylindrical bore (51) through which the cable (3) is guided and cut-outs (52) extending in the longitudinal direction of the cone and passing through the wall of the cone (5), whereby the cone (5) can be compressed in the radial direction so that the internal diameter of the cone (5) can be reduced.

Abstract: An insulating cap for a loadbreak bushing includes an outer conductive jacket preferably having a ground wire receiving member thereon. The ground wire receiving member may be in the form of an integral tab having a bore therethrough for connection of the ground wire. The insulating cap further includes an insulation member positioned in adjacent relationship to the inner surface of the conductive jacket. In a preferred embodiment, both the inner surface of the conductive jacket and the inner exterior surface of the insulation member includes a smooth, dome-shaped region which helps to control electrical stresses, if any. The inner surface of the insulation member defines a bushing receiving space which substantially corresponds to the exterior shape of a loadbreak bushing. When properly grounded, the outer conductive jacket of the insulating cap is maintained at ground potential.

Abstract: A cable head, in which ends of cable cores, made of a plurality of individual stranded conductors, are inserted into the bore holes of a cable lug. The cable cores are fixed in position in the bore holes by radial pressing and deformation of the bore holes. The bore holes are located on divided circles which are concentric relative to each other, the bore holes on the inner divided circle being staggered with respect to the bore holes on the outer divided circle. Cooling-water grooves between the bore holes located on the outer divided circle extend, with a depth, into the proximity of the bore holes arranged on the inner divided circle. They are connected to a central cooling-water channel in the cable head.

Abstract: A flexible buss bar adapted for electrical connection with circuitry carried by a glass pane is provided, as well as a method of attaching a flexible buss bar to a glass pane. The flexible buss bar includes a flexible conductor having at least one metallic contact pad affixed thereto. It is also contemplated to have a plurality of such metallic contact pads attached at regular intervals along the length of the flexible conductor. The spacing of the plurality of metallic contact pads is selected to match the locations of corresponding structures formed on the glass pane. Solder cladding is selectively adhered to portions of the at least one metallic contact such that the at least one metallic contact pad may be bonded to the corresponding structure located on the glass pane.

Abstract: A fitting (70) for covering the fixation point of a cord (80) to a ceiling surface has a hollow body (71) which defines an outer curved plane and an inner cord passage cavity (72). To facilitate a fitting or fixation of the fitting (70) after the suspension and connection of an electrical appliance such as a swinging lamp, and to facilitate a subsequent dismantling of the fitting (70) for the purpose of cleaning and/or replacement, the hollow body (71) has two parts (82, 84) which are interconnected through a hinge (86) and thus rotatable with respect to each other between a first position, in which the body (71) is opened so that the cord (80) can be introduced freely into the inner cord passage cavity (72), and a second position, in which the body (71) is closed and encircles the cord (80), the cord being received in the inner cord passage cavity. The fitting (70) preferably has locks (90, 92, 94 and 96) for locking the two parts (82 and 84) in said second position, i.e.

Abstract: An electrical conductor terminating arrangement such as an electrical connector includes a contact-making element which makes good contact with an electrical conductor in response to axial pressure displacement over the contact-making element of a displaceable element to exert a radial force on the contact-making element and to co-operate therewith for providing ongoing pressure engagement between the contact-making element and the electrical conductor without the need for the continuance of axial pressure on the displaceable element after a predetermined axial displacement of the displaceable element.

Abstract: A semiconductor chip has a membrane mounted on supports that are held in the material of the chip so that the membrane is supported at a space from the chip. The membrane may be a metal layer. The supports are columns or webs that extend into the chip material. Electrical connections to the membrane may be made by conductive supports.

Abstract: A braid termination structure having an outer ring with an inner profile for fitting over the shielding braid for electrical and mechanical engagement therewith and being affixed to a shielding shell of an electrical connector wherein the braid is positively captured in an outer ring and is fixed thereto by welding.

Abstract: A device is disclosed for closing and sealing of cable cutout bushings of major diameters, generally of a rectangular shape, as they are usually provided for leading through electrical cables with premounted plugs that can be used at interfaces of control enclosures or prefabricated walls and bracket systems in coupling or connecting elements as well as for switching cabinets and enclosures for the closing and sealing of major cable bushings. The device is molded mainly out of elastic material in which three functional elements are connected together to form one piece which combines three functional elements together, namely, (a) a sealing flange, (b) a conduit as connection part and (c) a cable sealing element.

Abstract: A method of altering a portion of the semiconductive layer of an electric power cable, to increase its resistance so as to render it electrically insulative. The semiconductive layer is loaded with carbon powder which forms chains to provide conductive pathways through the layer. By introducing an intercalant into the semiconductive layer, which causes the layer to swell, the conductive pathways are interrupted and the material is rendered insulative (>10.sup.4 .OMEGA.-cm). The intercalant may be a polymerizable material with a curing agent which is cured in situ, i.e., without removing the semiconductive layer from the cable. By this method, flashover to the semiconductive layer at a cable splice or termination may be prevented without requiring tedious removal of the exposed portion of the semiconductive layer. The method is usable with both strippable and coextruded semiconductive layers.

Abstract: A connector is used to repair an electrical connection between a wire and a terminal of a wire wrap connection. The connector is a conductive tubular member having a plurality of barbs extending inwardly from the sidewall thereof. The connector is insertable over the terminal having the wire wrap connection made thereon. When the connector is inserted onto the terminal, the barbs slide along the surface of the terminal and the wire to establish an electrical connection between the wire and the terminal. The connector may include a gel inside which prevents corrosion of the wire wrap connection.

Abstract: A two part range-taking member for providing a seal around a substrate includes a mating pair of resilient components for enclosing the substrate and a co-operating pair of rigid components for urging the resilient components into conformity with the substrate. The member may provide an electrical stress cone for a power cable, for example with two such members being provided in a cable joint.

Abstract: The invention relates to a connector and a manufacturing method thereof for a three-phase cable including concentric, segmentally disposed phase conductors (1) with surrounding insulation structures (11) and a concentric earth conductor (8) enclosing the phase conductors. According to the invention, the phase conductors (1) inside the connector are isolated from each other by a star-shaped dividing insulation piece (3) keeping the phase conductors (1) separate in their segments. Phase terminals (2) of the connector are disposed on the segment bottoms of the dividing insulation piece (3). The connector further incorporates a clamp (5, 7) suited for pressing the phase conductors (1) against the phase terminals (2) and a ferrule (10) on which the earth conductor (8) can be bent backward to mechanically lock a receptacle.

Abstract: A structure for making a sealed electrical connection through a barrier is disclosed. The structure comprises a feed-through board that is sealed in an aperture in the barrier. A conductive rod is disposed within a bore formed in the board. Inner and outer conductors are electrically connected to the conductive rod by means of connecting structures formed in the respective ends thereof. A plurality of layers of insulative materials are formed about the inner and outer conductors and the conductive rod so as to electrically insulate the conductors and the conductive rod, to form a structurally sound point of connection through the barrier, and to seal the bore through which the conductive rod is passed. A method for making a sealed electrical connection through a barrier is also disclosed.

Abstract: Electrical wire connector for a twisted pair of electrical wire ends, wherein the electrical wire connector has a heat-shrinkable inner portion which will provide a water-tight, electrically-insulating covering of the electrically-conductive junction after the electrical wire connector is applied and heated. In preferred embodiments of the present invention, a heat-shrinkable inner portion is visually distinct from a non-heat-shrinkable outer portion, so that the action of the heat-shrinkable inner portion is visually observable.

Abstract: A wire harness includes a plurality of wires surrounded by a continuous molded sheath. The sheath includes a first section made of a first material and a second section integral with the first section and made of a second material different from the first material. The different materials provide different colors, such as for color-coding branches of the wire harness. The different materials also provide areas of increased abrasion resistance to mechanical wear, temperature resistance and chemical resistance.

Abstract: A cable splice closure includes a closure body having mating surfaces sealed together. An end seal in the closure has an opening for receiving a cable. The end seal is sealed to the closure body by an adhesive bond. An adhesive injection port is provided in the end seal to communicate an adhesive injected into the end seal and to bond into a sealed unit the surf aces of the end seal and the cable to be received. The adhesive is a low surface energy adhesive based on acrylic monomers with organoborane amine complexes.

Abstract: A device for repairing and electrically connecting at least two sections of electrical cable includes an elongate connector, for example a tube, having two open ends that are each adapted to receive an end of an electrical cable section. The cable connector has an interior wall longitudinally dividing the cable connector into two portions, each portion having a hollow interior for containing the end of one of the two electrical cable sections. The cable connector also has an orifice in each of the two portions communicating with the hollow interior of that portion. A closure device, such as a threaded plug, is mateable with each orifice.

Abstract: A 15 kv cable joint is enclosed within two half shells filled with sealant material. Displacement or thermal expansion of the sealant is accommodated by various configurations of stress cones that have apertures or surfaces that are flexible and arranged to maintain pressure on the sealant for example during thermal cycling of the joint.

Abstract: A boot 23a for insulating the bare end of an insulated electrical wire includes a neck 25 to hold a wire or wires 21a centrally in the boot. The boot is filled with a solidifiable liquid substance 24, such as epoxy resin, to encapsulate the wire or wires after insertion. The boot may be transparent and include depth markings 26, 27 to determine the minimum insertion depth of the wire or wires 21a and the minimum level of substance.

Abstract: Submersible cables that are placed in a body of fluid such as water or other fluids such as chemicals or sewage often require a takeoff to be added to the submersible cable wherein a window is cut in the exterior insulation of the submersible cable or parent trunk exposing interior wires or fiber optical cables or tubes and the like.

Abstract: In order to reduce the commutation inductance of series-connected controllable semiconductor components (V1-V6), the latter are connected, in an essentially orthogonal manner and at a predeterminable distance (a), via spur double striplines (6, 6') to essentially planar main lines (5, 5'). All of the double striplines (5, 5'; 6, 6') have a layered structure and are mutually insulated by a thin insulating layer (7), with the result that a minimum current area is achieved. The controllable semiconductor components (V1-V6) are accommodated closely adjacent to freewheeling diodes in a module (10), the heat of which can be dissipated by cooling elements (8). Bipolar transistors having an insulated gate (IGBTs) are preferably used as controllable semiconductor components (V1-V6).

Abstract: A 15 kv cable joint is enclosed within two half shells filled with sealant material. Displacement or thermal expansion of the sealant is accommodated by various configurations of stress cones that have apertures or surfaces that are flexible and arranged to maintain pressure on the sealant for example during thermal cycling of the joint.

Abstract: An elastically recoverable elastomeric splice cover suitable for use covering a joint connector in a cable conductor having a central body with two distal opposing geometric cones capped by extended endseals, and formed from three contiguous layers,a) a semiconductive outer shield layer,b) an inner toroidal electrode disposed along a central axis having a length less than that of the body,c) and interposed therebetween, an intermediate insulative layer having a length equal to that of the body and geometric cones. The outer shield layer and electrode are formed from a thermally conductive silicone elastomer, and all of the layers are formed from a silicone elastomer having a tear strength of at least about 15 N/mm, and an elongation of at least about 400%. The insulative layer further includes from about 10% to about 35% of an electrically insulative filler, and has a minimum thermal conductivity of at least about 0.

Abstract: A cable assembly (8, 80) including an electrical cable (10) having a flexible tubular jacket (12) and a reinforcing structure (14) attached to the outside of the jacket in a smooth sealing connection (30), and a method of using radio-frequency electrical energy, applied radially through the cable jacket (12) and the reinforcing structure (14), to make the connection (30). A shield conductor (26) inside the cable jacket (14) may be used as an RF electrode, with a second RF electrode (42, 44) circumscribing a portion of the cable (12) and the reinforcing structure (14) and shaping the outer surface of the connection. The RF energy may be used instead to activate an adhesive (108). An outer electrode (118) may be embedded in the reinforcing structure (116) in one variation of the invention.

Abstract: A flexible cable assembly (1) is constructed with flexible and hollow armor (2) lying limply within an air gap (3) in a flexible outer jacket (4), multiple coaxial cables (5) lying limply within an air gap (6) in the armor (2), a coupling (7) for connection to a medical instrument (9), the coupling (7) being secured to an end of the armor (2) and an end of the jacket (4), with the cables (5) extending through the coupling (7) for connection to the medical instrument (9).

Abstract: The terminal portion 83 of a contact 82 is of a groove type, with a larger diameter than the lead wire diameter, and includes small holes 84 drilled and installed in the bottom of the groove. By such a construction, when the solder 19 flows in between the terminal portion 83 and the lead wire by the surface tension, the air between the terminal portion 83 and the lead wire discharges through the small holes 84, thus preventing formation of an air layer between the terminal portion 83 and the lead wire. The holes 84 permit solder to enter the holes to discharge the air, but are sufficiently small to prevent solder from flowing therethrough and dripping out of the groove. By observing whether or not the solder has flowed into the small holes 84 it is possible to confirm whether the solder has entered the clearance between the lead wire and the terminal.

Abstract: A method and apparatus for providing electrical conductivity between the opposing surface edges of gaps and joints in composite and metallic structures comprises fiber flocking a first and second set of conductive fibers in a direction normal to the surface edge of each side of the gap or joint. The first and second set of conductive fibers are positioned such that the conductive fibers interdigitate with respect to each other providing a compliant electrically conductive path between the opposing surface edges of the structural gaps and joints. After assembly, the defined joint or gap containing the interdigitated sets of carbon fibers may be filled with a polymer material or materials which constitute state of the art matrix materials used for conductive joints. Applications for this technology include electromagnetic shielding and low observables.

Abstract: An improved structure of a safety plug for coaxial cable comprising a main body and a hand tool, said main body is a hollow circular tube having an internal flange at its rearward wall, in an appropriate location at the forward end of the circular tube is an annular groove and an annular sloping portion in between the annular groove and the sloping portion, which are both inside the circular tube, are spring washer, a coaxial cable and a clamping element. When the main body of the safety plug is rotated, the cable will not be able to rotate with the main body, a special hand tool has to be used to drive the safety plug with the coaxial cable into and out of the input jack.

Abstract: A multiconductor cable (10) including a large number of coaxial conductor pairs (16), with the coaxial conductor pairs arranged in groups (14) each including several of the coaxial conductor pairs arranged in a required order as a modular array (18) with each of the conductor pairs of each array being held in a required position with respect to the others and supported with a portion of each central conductor (54) and each shield conductor (47) exposed at a predetermined position, for connection of the array to a corresponding array (28) of terminal pads (24, 26) on a circuit board (30) or the like. Each array includes support bodies (32, 34) of flexible dielectric sheet material adhesively attached to the coaxial conductor pairs to support them in the required positions. Apertures (70, 76) are defined in the sheet material to expose the conductors for simultaneous soldering to, or unsoldering from, the terminal pads (24, 26), without removal of the support bodies (32, 34) from the coaxial conductors.

Abstract: A shielded banana plug attached to one end of a test lead is suitable for connection to a corresponding input receptacle in an instrument. The plug includes an inner conductor having an first nonconductive shroud which is concentric with and spaced apart from the inner conducter. The shroud extends beyond the tip of the inner conductor. A conductive shield is concentric with and outside the first nonconductive shroud and is recessed from the end of the shroud. A nonconductive outer shroud is spaced apart from and concentric with the shield and extends beyond the tip of the inner conductor. An input receptacle suitable for mating with the shielded banana plug includes an conductive inner sleeve for receiving the inner conductor, a nonconductive shroud that is concentric with and outside the inner sleeve and which extends beyond the inner sleeve, and a conductive outer sleeve for receiving the conductive shield. The input receptacle is also suitable for mating with a conventional, nonshielded banana plug.

Abstract: Electrical termination and connector structures for electrical cable, and a penetrator for electrical power and/or signals through a pressure barrier, provide, in different embodiments, mechanical attachment to the cable and to individual conductors of a multi-conductor cable; and provide fluid-tight seals to protect the terminated and interconnected conductors from adverse ambient gases and liquids. A molded elastomeric body, in one embodiment, provides the rugged fluid-tight seals. The electrical termination and connector structures withstand cycled pressure and temperature environments, and include a mechanism for restraining the extrusion or other displacement of cable insulation under conditions of cycled pressure and of temperature. The structures also accommodate axially adjustable installation and differential axial expansion and contraction.

Abstract: A high energy coaxial cable is disclosed which is flexible to the extent of allowing a bend radius as short as 11 1/2 inches. The cable will conduct up to 500 kiloamperes and is reinforced to resist the high magnetic forces within the cable caused by the high current conducted. The cable is therefore useful in coupling high current between parts which experience relative movement such as a stationary power supply and a recoiling gun breech.

Abstract: An arrangement for insulating junctions of three or more conductors utilizing standard connectors for joining conductors having different types of insulation and/or different sizes. The junction is enclosed in a cage formed of wire, wire and sheet metal, sheet plastic, or molded plastic. The cage material is supplied in sheet form and is cut to appropriate size for a particular junction to form an armature for supporting insulating material. A hoop may be used to support the cage. Insulation covers the cage and connectors.

Abstract: An apparatus and method for connecting the end portions of electric wires to each other prevents the generation of a respiratory action in the connected end portions of the electric wires and thereby improves connection quality and connection working performance, and reduces the size of the connected portions. Insulating coatings of the end portions of electric wires are removed to provide exposed conductors. The exposed conductors are collected and integrated into a collective conductor and a tapered insulating cap having an opening at one of its ends is fitted over the collective conductor with portions of the insulating coatings adjoining the collective conductor.

Abstract: A protective cover for accommodating an end connecting part of a bundle of wires includes a box-type of casing body provided with a storage chamber to accommodate the end connecting part therein and a lid pivotably connected to the casing body to close the opened upper portion thereof. A bottom wall of the casing body is provided with a stop in the shape of a rectangular plate. With the arrangement, when accommodating the ends of the wires in the casing, the stop intrudes into the wires. Under this condition, even if the wires are pulled outside the casing, the end connecting part of the wires is hooked by the stop, whereby the wires can be retained in the casing without being drawn therefrom.

Abstract: An electrical conductor terminating arrangement such as an electrical connector includes a contact-making element which makes good contact with an electrical conductor in response to axial pressure displacement over the contact-making element of a displaceable element to exert a radial force on the contact-making element and to co-operate therewith for providing ongoing pressure engagement between the contact-making element and the electrical conductor without the need for the continuance of axial pressure on the displaceable element after a predetermined axial displacement of the displaceable element.

Abstract: A cap sleeve is composed of a cap member having an open end receiving a seal member with a sealing system. The sealing system includes the seal member acting with a second member to form a sealing chamber for receiving a sealing ring and an arrangement for moving the seal member relative to the other member to reduce the volume of a sealing channel receiving the sealing ring to cause an outward radial deformation of the sealing ring into contact with an inner surface of the cap member to form a seal therebetween.

Abstract: A kickless water cooled cable includes six alternate polarity conductor strands and paired terminal lugs at each end which are semi-circular and mutually insulated along a diameter, the inner end of each lug including a projection having parallel flattened strand connecting surfaces. The projections are offset from each other along the diameter of insulation, the opposite offset surfaces providing a radially outer and a recessed inner connecting surface on the respective lugs. A single strand is connected to the outer surface while a dual strand termination is connected to the recessed inner surface, the single strand lying between the dual strand to form the alternate polarity conductor strands. The strands are separated by a star separator and enclosed in a hose through which water is circulated. The projections include angled inner ends to provide greater contact area, the dual strand termination includes an angled offset portion parallel to yet clearing the angled surface of the opposite lug.

Abstract: A rubber plug for sealing is engaged with a covered wire, and the rubber plug is prevented from being disconnected when an insulation barrel of a terminal fitting is clamped to the plug. The insulation barrel is curved and clamped along a maximum extent of the outer circumferential surface of the rubber plug, while both end portions of the insulation barrel are overlapped. Both ends of the insulation barrel can be prevented from biting onto the surface of the rubber plug.

Abstract: A sleeve for receiving branch or joint areas in optical or electrical cables, comprises a stable, essentially cylindrical hollow body (8) with at least one open end to receive the branch or joint areas, where a sleeve head (1) is inserted into the open end(s) and the sleeve head(s) (1) has (have) passage openings (2) in the form of radial slots (2) for the incoming or outgoing cables (3, 4). The slots (2) contain sealing bodies (11), which encompass the incoming or outgoing cable (3, 4) and seal the slots (2).

Abstract: A device for forming an electrical connection between a plurality of elongate electrical conductors comprises an electrically insulating sleeve, and contained within the sleeve a resiliently deformable tapering coil and a quantity of fusible polymeric material, the device being arranged so that the elongate electrical conductors may be connected by twisting them into the coil so that at least part of the coil is deformed and heating the device so that at least some of the fusible polymeric material melts and then, when solidified, substantially binds the coil in its deformed state.

Abstract: The invention disclosed herein is for an improved electrical connector assembly used on couplers and program modules in marine streamers used in offshore seismic exploration. In particular, the invention disclosed herein is comprised of a deformable seal ring with a plurality of holes formed therein through which pass individual conductor wires through which are transmitted signals from various hydrophones disposed along the marine streamer. Deformable nipples are disposed on each side of the seal disk 16 around each of the openings extending through the seal disk. The seal disk and nipples are deformed around the conductor wires passing through the openings in the seal disk through use of a compression disk and spring which provides dynamic spring loading of the seal disk-conductor wire interface, thereby maintaining the integrity of the seal established between those components.

Abstract: This invention involves an apparatus for terminating conduit, cable, and braided bundle in which the termination is accomplished with an interference fit between a collar and an end fitting. Once assembled, the conduit, cable, or braided bundle is compressed between the collar and the end fitting such that the final assembly can withstand the required level of axial and transverse force for the application, but not so much that the conduit, cable, or braided bundle loses its structural integrity.

Abstract: A modular contact assembly including first and second members at opposed ends such as a wire barrel member (20) or a contact member (50,100) having either a socket contact section (62) or a pin contact section (108) at a mating end, and optionally an intermediate member (80) interposable between the first and second members. Assembly faces (30,84) of one of the members (20) and intermediate member (80) each may include a small diameter bore (28,82) thereinto, and mounting faces (54,88) of the other of the members and intermediate member each may include a cylindrical embossment (56,86) extending therefrom having a diameter slightly larger than that of the small diameter bores, enabling force fittable insertion thereinto during contact assembly. The wire barrel member (20) is usable with either a pin contact member (100) or a socket contact member (50), and the intermediate member (80) enables fabrication of an elongate socket contact assembly (10) or pin contact assembly if desired.

Abstract: An .?.angularly adjustable.!. angularly adjustable electrical conduit fitting includes an articulate metal conduit bendable at least 90 degrees about an arc having an inside radius of curvature not exceeding 12 inches, the conduit .?.in its preferred from.!. being between 193/4 and 203/4 inches long in a contracted state and being extendable by between 21% and 23% of its contracted length and having at one end a conduit coupling and at its opposite end a conduit or wall opening connector.