Abstract: A bus support includes a corona shield portion and a bus support portion on the corona shield portion. The bus support portion includes an insulator engagement ledge including one or more mounting apertures configured to receive a fastener therethrough for mounting the bus support to an insulator. The bus support portion includes first and second bus support walls extending upwardly from opposite sides of the insulator engagement ledge. Each bus support wall includes a U-shaped channel defined therein that is configured to receive and support a cylindrical and/or tubular bus conductor. The corona shield portion and the bus support portion form a monolithic structure.

Abstract: A cable handling apparatus may include a frame and a first cable jaw mounted to the frame. A second cable jaw is pivotally mounted to the first cable jaw so that the first and second cable jaws may be pivoted with respect to one another between an opened position and a closed position. A lock assembly operatively associated with the first and second cable jaws locks said first and second cable jaws in the closed position.

Abstract: A tangent suspension bracket configured for coupling to at least one of a suspension insulator and a conductor clamp assembly. The tangent suspension bracket further includes a central cap, a first end attachment structure and a second end attachment structure. The central cap structure includes an upper wall having an opening and a depending skirt, together defining a downwardly opening cavity. The opening is structurally configured to allow the passage of a portion of one of the suspension insulator and the conductor clamp assembly while maintaining a portion within the downwardly opening cavity, so as to secure the central cap structure to one of the suspension insulator and the conductor clamp assembly. The first end attachment assembly extends from the central cap and the second end attachment structure extends from the central cap in the opposite direction.

Abstract: A dielectric cover system for an insulator supporting a high voltage conductor is molded to fit over the insulator to cover at least a top portion of the insulator and the conductor in contact with the insulator. A bolt through the cover is inserted to a depth to engage a reduced-diameter neck area of the insulator to prevent the cover from being rotated about the insulator during a high wind condition. Other securing devices may instead be used that allow the cover to be freely placed over the insulator and then effectively restrict an inner diameter of the cover at a reduced diameter portion of the insulator, such that the securing device blocks the cover from being lifted off the insulator and rotated about the insulator.

Abstract: A stop system may include: a first member; a second member movable with respect to the first member, the first and second members being different parts of a common machine; a body including a boss defining a hole; a base plate at least one of: attached to and part of, the body on the side of the body opposite of the boss, the body and base plate forming a shoe; and a fastener extending through the hole in the boss thereby pivotally attaching the body to one of the first and second member. A method of providing a stop for stopping a thumb against a stick is also described.

Abstract: A vibration damper for a conduit line. The damper includes a flexible body defining a bore and a slot adjacent to the bore. The body is flexible between a first configuration in which the slot has a first width that is insufficient to permit the conduit line to pass therethrough, and a second configuration in which the slot has a second width that is sufficient to permit the conduit line to pass therethrough, the second width is greater than the first width. The flexible body further includes a plurality of tuning splines. The tuning splines include a length and a width configured to reduce vibration of the conduit line when the damper is connected to the conduit line such that the conduit line extends through the bore.

Abstract: A non-conductive wire splice apparatus having a connector configured to be coupled between a first wire and a second wire. The connector having a non-conductor coupled between a first sleeve and a second sleeve. The first sleeve being attachable to the first wire. The second sleeve being attachable to the second wire opposite the first sleeve. The non-conductor being configured to electrically insulate the first wire from the second wire. An electrical current in the first wire is insulated from being conducted to the second wire.

Abstract: A cable termination device of the dry type, for terminating a high voltage cable, including an insulator housing with a first end and a second end and having a hollow interior, and which second end has an opening for insertion of a high voltage cable. The cable termination device further includes a stress controller device located inside the insulator housing and adapted to be mounted on a high voltage cable, an end cap located at the first end of the insulator housing and provided with an external electrical connection means, and an electrically insulating gel filling at least part of the hollow interior of the insulator housing and surrounding at least part of the stress controller device. Further, the stress controller device is provided with a first and a second deflector arrangement for controlling an electric field.

Abstract: A plastic retaining pin for being inserted through a retaining hole in a high voltage insulating cover has an oval cross-section. The pin has a compressible nose, with the wide part of the nose being larger than the retaining hole. The nose has a relatively long front portion that expands out from the tip at about a 15 degree angle for easy insertion through the retaining hole. A back part of the nose is relatively short and has a relatively steep angle of about 45 degrees so as to require a higher pulling force to compress the nose when removing the pin from the hole. The other end of the pin has a grasping hole for receiving the hook of a hot stick. If the retaining hole is oval, the grasping hole is at a predetermined orientation with respect to the insulating structure to ease removal using a hot stick.

Abstract: A wire harness including a wire fitting that holds a wire in a predetermined shape is provided. A wire fitting includes a base molded to an uneven plate-shape and a cover covering a wiring space of the base. In the base, an outer frame portion formed projecting around the wiring space on a wiring portion forming a bottom plate includes an inner edge step portion, an intermediate plate portion, and an outer edge step portion. In the intermediate plate portion, which projects outward, a plurality of through holes for wire fastening are formed linearly along the perimeter of the wiring space, the number of the through holes for wire fastening being at least the number of wire fasteners attached to that portion of a wire that extends from the wiring portion to the outside thereof.

Abstract: A wire harness is provided, with which a wire fitting can be arranged in an irregular space that is three-dimensionally bent, and with which the number of man-hours for manufacturing the wire harness can be reduced. A wire fitting includes a base that is molded into an uneven plate shape and forms a wiring space, and a cover that is assembled to the base. The base includes a level wiring portion and a slanted wiring portion that extends along a plane that is slanted with respect to the plane along which the level wiring portion extends. The cover includes a level opposing wall portion opposing the level wiring portion and a slanted opposing wall portion that opposes the slanted wiring portion and extends along a plane that is slanted with respect to the plane along which the level wiring portion extends.

Abstract: A power line insulating assembly and safety arm pin includes: an insulating section, where said insulating section includes an end portion where a fight hand threaded section is provided at the end portion for securing the insulator section to the power linen hardware, wherein the insulating section abuts an arm nut and shoulder assembly; and a safety arm pin connected to the insulating section via the nut and shoulder assembly, where arm pin includes a left handed threaded section to receive hardware for mounting the assembly on a power line transmission assembly, where said hardware is removable without loosening of the insulating section. The hardware for mounting may include a square washer, a left-handed nut and left-handed lock.

Abstract: The insulator, includes a lower bell shaped portion, an intermediate annular waist portion and an upper saddle portion for receiving and supporting an electric transmission overhead cable. An axial blind bore opens at its lower end for receiving an upstanding support pin. The saddle portion includes a transversely-curved groove, substantially normal to the axial bore, and jutting parts on each side of the cable receiving groove and laterally protruding from the waist portion. Each jutting part has an external face which is provide with a partly annular groove, generally coaxial with the bore and of greater radius than that of the waist portion. These annular grooves are adapted to positively retain the inturned flanges of a cable retaining clasp despite an upward force or a laterally upwardly directed force exerted by the cable on the clasp. The waist portion can still be used for attaching the electric wire by a tie-wire.

Abstract: An insulator arrangement for supporting a conductor with an enclosure has an insulator fixedly connected at one end with the conductor. The insulator has another end portion mounted to a first shock absorber. The first shock absorber is further mounted with an access cover to permit displacement of the conductor and the insulator relative to the access cover. The insulator arrangement has second shock absorbers mounting the access cover to the enclosure permitting relative displacement between the access cover, which supports the insulator and conductor, and the enclosure.

Abstract: Cable support insulators of the present invention generally have an insulator body having a cable base and a plurality of insulator sheds. The cable base has a ratchet locking mechanism to secure an electrical conductor to the insulator. In preferred embodiments, a cable support insulator is provided that has an insulator body includes a plurality of insulator sheds and a cable base. A locking base is connected to the cable base, and a retaining clamp is pivotally connected to the cable base. The cable base has a front end, a back end, and a seat adapted to receive a conductor cable. The locking base has a front plate having a plurality of ratchet teeth. The retaining clamp has a first retaining arm, a second retaining arm, and a locking blade.

Abstract: An electrical power line insulator has an end clamp with a saddle for supporting an electrical wire, a track provided on a front surface of the saddle, a keeper for compressing and supporting an electrical wire seated in the saddle, a bolt and a nut for fastening the keeper to the saddle and operable to horizontally move the keeper along the track, and an insulator housing secured to the end clamp and mounted on a support structure. The end clamp and the insulator housing are detachably assembled with each other by means of a cylindrical clamp base integrally provided on a lower portion of the saddle and the track of the clamp and an upper fitting part.

Abstract: An electrical power line insulator has an end clamp with a saddle for supporting an electrical wire, a track provided on a front surface of the saddle, a keeper for compressing and supporting an electrical wire seated in the saddle, a bolt and a nut for fastening the keeper to the saddle and operable to horizontally move the keeper along the track, and an insulator housing secured to the end clamp and mounted on a support structure. The end clamp and the insulator housing are detachably assembled with each other by means of a cylindrical clamp base integrally provided on a lower portion of the saddle and the track of the clamp and an upper fitting part.

Abstract: Cable support insulators of the present invention generally have an insulator body having a cable base and a plurality of insulator sheds. The cable base has a ratchet locking mechanism to secure an electrical conductor to the insulator. In preferred embodiments, a cable support insulator is provided that has an insulator body comprising a plurality of insulator sheds and a cable base. A locking base is connected to the cable base, and a retaining clamp is pivotally connected to the cable base. The cable base has a front end, a back end, and a seat adapted to receive a conductor cable. The locking base has a front plate having a plurality of ratchet teeth. The retaining clamp has a first retaining arm, a second retaining arm, and a locking blade.

Abstract: A method and arrangement is provided to form a gas-tight joint between an end flange and a tubular rod. The joint is formed via a heat-shrink process to provide an interference fit. The rod is provided with grooves to retain adhesive during the assembly process.

Abstract: A green ceramic insert having a green ceramic body provided with a recess extending through the ceramic body is provided, the recess being filled with a paste which may be converted into an electrical plated hole. A ceramic insert made from a sintered green ceramic insert of this type is also described. In addition, a ceramic green body or a green body composite is provided, which has at least one recess in some areas, into which one of the described green ceramic inserts is inserted. The ceramic insert may be integrally joined to the laminated composite, a conductive paste converted by sintering into a printed conductor being routed on the laminated composite in a manner electrically insulated from it, and electroconductively connecting the top of the laminated composite to its bottom via the electrical plated hole.

Abstract: A method and arrangement is provided to form a gas-tight joint between an end flange and a tubular rod. The joint is formed via a heat-shrink process to provide an interference fit. The rod is provided with grooves to retain adhesive during the assembly process.

Abstract: The present invention relates to an outdoor termination for a high voltage cable, comprising an insulator body for receiving the high voltage cable; a filling compound provided within the insulator body and filling at least a portion of the space between the insulator body interior walls and the cable insulation; wherein said filling compound consists of a mixture of particles and an insulating compound; wherein said insulating compound is a crosslinked polymeric material with a DIN ISO hardness of 200 to 500 mm/10.

Abstract: An electric wire-connecting portion (11) is formed by connecting together conductive ends of a plurality of electric wires (W). One end of a heat shrinkable tube (12) is sealed with hot melt adhesive (15). The heat shrinkable tube (12) is attached onto the electric wire-connecting portion (11). A tube holding tool (13) for protecting the one end of the heat shrinkable tube (12) against heat is attached to the one end of the heat shrinkable tube (12). The heat shrinkable tube (12) is heated to shrink thereby sealing the electric wire-connecting portion (11). The tube holding tool (13) includes a holding portion (13a) for holding the one end of the heat shrinkable tube (12), and a shaft portion (13b) integrally formed with the holding portion (13a).

Abstract: A thermistor assembly holding device includes a holder and locking mechanism. The holder is comprised of a first member and a second member. The first member includes a projection and the second member includes a receiving slot. When the projection is inserted into the receiving slot the first and second members are in a closed position and form a cavity. The thermistor assembly is received within the cavity. The holder is inserted into the locking mechanism that is coupled to an HVAC unit of an automobile. The locking mechanism includes a base and a locking plate with an aperture disposed throughout. A locking channel is disposed between the locking plate and the base. The locking channel receives a locking projection that is integrally formed with the first member. The locking projection in conjunction with a knob interacts with the locking mechanism to secure the holder to the HVAC unit.

Abstract: A composite insulator is provided. At least one metal end fitting is provided having a sleeve portion which defines a bore with a first diameter, d1. An insulator subassembly is then formed. The insulator subassembly includes a rod of electrically insulating plastic material and an insulator sheath covering at least a portion of the outer surface of the rod. An end portion of the sheath has a deformable circumferential ridge formed on the outer surface thereof. This circumferential ridge has a second diameter, d2, which is greater than the first diameter, d1. The insulator subassembly is then inserted into the bore of the metal end fitting with a spacer member interposed between the metal end fitting and at least the circumferential ridge. The spacer member serves to deform the ridge to define a temporary vent for allowing air within the bore to escape.

Abstract: In a method of producing a composite insulator having a core member, end fitting members fixed to both end portions of the core member, and an overcoat member including a sheath portion formed on an outer surface of the core member and shed members, the overcoat member and the end fitting member are connected by curing. Moreover, a clamping operation is performed or a packing member is used for preventing a flow of an overcoat forming material into a seal portion. In this manner, it is possible to improve a seal performance of a connection boundary between the end fitting member and the overcoat member.

Abstract: A one piece electrical power line post insulator having a universal end clamp replaces traditional trunnion or top tie style devices. In a preferred embodiment, the invention has an insulator with a support structure base fitting at one end and a clamp at the other. The base fitting allows attachment of the device to a support structure in either a substantially vertical or horizontal orientation. The clamp has a saddle for receiving a conductor when the device is either in a horizontal or vertical orientation. A keeper is movable on a captive bolt along a track defined in the clamp body and is securable over a conductor by a lock washer and nut on the bolt.

Abstract: An insulating assembly for an overhead power line has a main subassembly formed of two parallel spaced insulators joined at their ends by aluminum end pieces. The end pieces each have a slot aligned with the space between the two insulators and a rod projecting from the end piece in alignment with the slot but below the slot. This arrangement enables the subassembly to be hung on a hot power line with the line passing along the slots and the space between the insulators. The rods may be clamped to the line by any suitable device such as wedges and C-shaped clamps. With the subassembly thus mechanically and electrically connected securely to the line, the line can be severed at a location between the end pieces and the free ends forced apart.

Abstract: A composite electrical insulator (1) includes a plastic rod (2), e.g., an FRP rod, which is covered by a sheath which includes a resilient and electrically insulating material. A metal fitting (4, 5) on each side of the insulator (1) has a radially inwardly deformable sleeve portion formed with a bore in which the end portion of the plastic rod (2) is covered by the sheath (3). The end portion of the sheath (3) has an outer surface opposite to the metal fitting (4, 5), which is provided with at least one circumferential ridge (7a, 7b).

Abstract: A small-sized highly accurate gas sensor, which is excellent in its reliability of electric connections between contacts and fixtures while being freed from any damage, includes a base member; a detecting unit mounted on the base member for detecting a gas concentration; electrodes mounted on the detecting unit; cylindrical contacts buried integrally in an end portion of the base member; and electric leads interposed between the cylindrical contacts and the electrodes. Contacting fixtures for external lead wires are fitted in and contact the cylindrical contacts so that they are connected to the cylindrical contacts.

Abstract: An electrical assembly, such as an insulator or a surge arrester, having an elastomeric weathershed housing, a pair of end fittings, and a pair of sealing systems for coupling and sealing the interfaces between the end fittings and the ends of the weathershed housing. Each of the end fittings has a bore for receiving an end portion of the weathershed housing, and an annular flange extending inwardly from the bore for engaging and compressing the end portion of the weathershed housing inwardly to form a primary annular seal without crimping the end fitting against the weathershed housing. At least one locking ring is positioned between the end portion of the weathershed housing and the inner surface of the bore for forming a secondary annular seal. Additional sealing can also be provided by axially compressing the weathershed housing between the end fittings.

Abstract: An insulator of the type composed of a core onto which a skirt made of insulating material and provided with fins is molded. The core comprises an axial rod of a composite material onto whose ends the end sleeves of mounting terminals are swaged.The rod comprises a web of longitudinal, parallel fibers bonded by thermosetting resin and encased in a braided or woven envelope like covering. A mounting terminal is connected to an end of the rod by a combination of uniformly distributed radial locking of the sleeve onto the rod and by penetration of the metal of the sleeve into gaps between the fibers of the envelope like covering.

Abstract: A cable device for connecting electrical apparatuses with a power source or housing parts of electrical apparatuses with one another has a foldable electrical cable which has a plurality of folds with folding regions therebetween, and fixing elements which fix bending points in the folding regions against turning movements.

Abstract: A high-voltage test terminal for interconnection between high-voltage power lines and the bushing stud member of a transformer or reactor. An insulator component of the terminal is placed in compression rather than tension, the terminal having a substantially reduced moment arm to withstand angular forces which are created upon interconnection between the power lines and the stud member. Metallic end fittings for the insulator serve to maintain the insulator in permanent compression and provide ready disconnection of the bus bars of the terminal for determination of induced electrical currents such as by Doble testing. The insulator is mounted horizontally between the end fittings and between the power lines in substantially parallel and horizontal alignment therewith, and eliminates the torsional stresses which have been generated previously with upright post-type insulators.

Abstract: A device for facilitating integrity of an electrical interconnection of a pair of electrical suspended conductor cables includes a flexible conductive loop and a tension retainer between the cables. Free adjacent spaced apart ends of the cables are connected to the loop, the loop being electrically in series with the cables. A tension retainer is in series structurally with the respective adjacent and spaced ends of the two electrical conductor cables and maintains a first position of suspension. Axial tension on at least one of the cable tending relatively to separate the cables causes movement or breakage of the tension retainer thereby permitting the flexible conductive loop to move and expand and retain electrical integrity between the cable ends in a second suspended position.

Abstract: An improved fastening device. The fastener portion itself usually comprises a vise rotatably mounted on a base for connection to a support. In a first preferred embodiment the vise is mounted on a cylindrical stem rotatably mounted within a housing of the base having a cylindrical bore, the axis of rotation of the stem thus being the axis of rotation of the vise. In a second preferred embodiment, the base provides a cylindrical stem and the vise provides a housing with a cylindrical bore in which the stem is rotatably mounted. The vise has a pair of jaws between which a cable is fastened such that the neutral axis of the fastened cable is substantially perpendicular to the rotational axis of the vise.

Abstract: A method and apparatus for isolating electric power lines includes an insulator assembly to which is pivotally connected two line clamps. After the clamps clamp to the wire, the wire is cut so that the insulator isolates the line. In one form the clamping surfaces are curved in the longitudinal direction to make up for the loss of line length due to the elongation of the assembly under line tension. Cut-out assemblies for fuse and disconnect purposes are readily applied to the assembly by a lineman standing on the ground below.

Abstract: A clamp for a transmission wire has a clamping arm which travels on a captive bolt assembly and which may be pivoted away from a clamp saddle without disengaging the bolt assembly. The clamp may be manipulated with one hand, requiring a wrench as the only tool to tighten or loosen the clamping arm. The clamp is especially suitable for use in live line applications, since the risk of electrical shock is minimized by virtue of its structure.

Abstract: A clamp is provided for holding an electrical transmission line at the end of an insulator on a transmission pole or tower. The clamp comprises an arm which may be pivoted over a transmission line seated in a saddle portion of the clamp body. The arm is locked in place to hold the line by means of a screw or bolt which engages the end thereof. The clamp is capable of remote manipulation by conventional live line tools thereby providing greatly increased safety over presently known devices.

Abstract: An insulating spacer subjected to bending stresses is formed from a glass fiber reinforced rod having a transverse hollow in the vicinity of at least one end. The rod is covered with a sealing elastomeric sheath. A lightweight cable clamping structure includes two half sleeves clamped around the one end by U-bolts. At least one of the U-bolts also presses a cable clamp toward one of the half sleeves. The one half-sleeve has an internal boss, shaped to fit the transverse hollow so as to fix the half-sleeves on the rod, and a transverse external groove facing the cable clamp to fix a cable against the sleeve.

Abstract: A breaking and insulating clamp for tensioned electrical conductors is disclosed, and which comprises an elongate bar of an electrical insulating material, with the bar mounting separate clamping members at longitudinally spaced apart locations for separately securing an electrical conductor or the like at each location. This permits the conductor to be severed between the clamping members, so that the remaining portions of the severed conductor are isolated and insulated from each other. In the illustrated specific embodiment, the clamping members each include a U-shaped bolt received within mating channels in the bar so as to preclude relative longitudinal movement between the bar and the bolt, and a pair of cooperating plates mounted on the bolt. The plates are designed to be clampingly pressed together so as to securely retain an electrical conductor extending therebetween in the longitudinal direction.

Abstract: An electric fence wire mounting structure for supporting a highly tensioned and electrically charged wire from a wooden fence post at either a corner or at the end of a line of fencing which includes a strap of electrically non-conductive material and an elongated metal retainer which are held in engagement with each other and are bendable as a unit to engage the surface of a cylindrical fence post. The mounting structure is fastened to the post by metal fasteners such as nails spaced from the metal strap.

Abstract: The invention is related to a line post insulator suitable for overhead lines of a higher voltage value than 1000 V. One of the practical examples of the line post insulator is equipped with a swinging stirrup placed in the insulator cap. In the swinging stirrup there is a tapered hole narrowing downwardly and holding clamping jaws. The clamping jaws are constructed so that they fit into the tapered hole. Another practical example of the line post insulator is suitable for fixing a conductor and/or a tie wire. In the insulator cap of this line post insulator a slot is formed narrowing in one axial direction of the conductor or the tie wire. In the narrowing slot above the conductor or the tie wire, a tapered clamping jaw is placed into the slot. In the slot there is a clamping jaw with parallel side edges placed under the conductor or the tie wire.

Abstract: A bus conductor with a cylindrical external surface is supported on an insulator by first and second bus-supporting members, each comprising spaced legs and flanges at the free ends of the legs. The bus-supporting members embrace the bus conductor when the flanges are in juxtaposition. One set of flanges is fastened together by fastening means comprising a screw extending between the flanges and threaded into one of the flanges and a nut positioned between the flanges and threaded onto the screw. The nut is axially movable on the screw between first and second positions. When in the first position, the nut is tightened on the screw against the juxtaposed flange of one of the bus-supporting members, thereby locking the flanges in a fixed-joint position. When in the second position, the nut is tightened on the screw against the juxtaposed flange of the other bus-supporting member, thereby locking the flanges in a slip-joint position.

Abstract: The invention relates to fixing a bare cable on an electric insulator by means of a device which includes a fixed part integral with the insulator and which has a groove (5) which forms a cradle in which the cable is laid, as well as a moving part (8) which holds the cable in its cradle in the locked position. According to the invention the fixed part and the moving part have contact surfaces with the cable to be fixed such that said cable in the locked position is subjected to progressive deformation of its cross-section in a first direction substantially perpendicular to the direction which corresponds to the clamping of the moving part at the central portion of the cradle and in a second direction substantially perpendicular to the first direction at the two ends of the cradle. Application in particular to support insulators and to suspension insulators.

Abstract: A bus conductor support system includes a tubular bus conductor removably mounted on an insulator assembly in a hollow conductive tubular enclosure. The tubular enclosure is secured to a mounting platform. Access openings are provided in the tubular enclosure for servicing purposes. One end of the insulator assembly is removably secured to the hollow tubular enclosure in a manner which allows easy access thereto through an access opening in the tubular enclosure. The bus conductor is removably mounted on an opposing end of the insulator assembly in a manner which also allows easy access thereto through the same access opening in the tubular enclosure. In one embodiment, a single side access opening in the tubular enclosure is in proximate relation to securing means for the insulator assembly and mounting means for the bus conductor.

Abstract: A shear bolt assembly for a load limiting line support for a post insulator comprising a bolt having a first portion engaged with a saddle of the line support and a collar engaged by a line clamp. The collar is in abutting relation with the bolt and the collar and bolt have aligned axial bores in which a shear pin is secured. The shear pin can be secured in the collar and bolt by an adhesive layer and the shear pin can be brought into electrical contact with the bolt by providing a knurled section at one end which establishes interference fit and mechanical contact between the shear pin and the bolt.

Abstract: A three part bus support for supporting a cylindrical tubular bus on an insulator comprises a base and two identical end portions. Each end portion has a hook portion defining an opening and a base portion which is connectible to either of the opposite ends of the base at one of two wall portions formed along opposed ends of the base. When the end portions are connected to the base, the openings defined by the hooks are aligned for receiving a tubular bus. A projection of one end of the base portion of each end portion is tangent to an inner surface of the hook portion where the bus exerts a force caused by wind, and the base is asymmetrical about a longitudinal axis passing through the opposite ends of the base to provide improved locations of fulcrums of lever arms of the wind forces.

Abstract: The proposed suspension insulator is intended to ensure insulated suspension of power line wires to cross-arms of power line supports.The insulator comprises two flexible, arched insulation members rigidly attached to each other, with their convex sides being on the outside, like in a spring suspension (rigging). The fittings intended for the mechanical connection of the insulator to the cross-arm of a support and for suspending the wire to the insulator are mounted in the middle of the insulation members.