Abstract: A one piece grommet for accommodating a variety of wire sizes in an operable environment to substantially preclude travel of environmental parameters along a length of the wire passing the grommet is disclosed. The grommet has an outer annulus and a radially inwardly spaced inner annulus, connected by a neck, wherein the outer annulus has a sufficient rigidity to substantially preclude inversion of the grommet upon translation of the wire in an axial direction.

Abstract: A clip structure for extracting electric signals for measurement, which is improved in accuracy and reliability, and which can be handled easily. In the clip structure, an operating member is rotatably supported in a hollow base member with one end projecting from the base member, and urged in a specified direction. A cylindrical member is provided at the front end of the base member. Elastic wires are stored in the cylindrical member and grip portions are formed in the front portions of the elastic wires, while the rear portions are fixed to a lower portion of the operating member. The grip portions are configured to project from the front end of the cylindrical member when pushed in a direction opposite to an urging force and rotated. A contact pin member is disposed at a lower portion of the base member. One end of the contact pin member is engaged with the rear end of the cylindrical member while the other end is projected from the base member.

Abstract: Insulating bushing in which the external insulating casing consists of a single monolithic insulating tube (27) on which the flange (28), the upper insulating ring (26) and a lower electrode (29) are assembled by gluing. This obviates the use of intermediate seals required by the prior art in which the insulating casing is made in a plurality of pieces, these seals being a possible source of leakage. The whole assembly is more resistant to mechanical stresses caused by seismic events or internal short circuits; it is also safer, lighter and more economical.

Abstract: A grommet (150) is securable to and along an edge (46) of a wall (36) of an enclosure (10) to provide sealing about lengths of cable extending through recesses (48) along the edge (46). Grommet (150) includes a cable-receiving section (152) having a diaphragm (168) traversing each of the recesses and includes a virtual slit (156) extending from a thick top edge portion (154) and through the diaphragm to the thick bottom edge portion (158). A cable (22) is insertable into the virtual slit (156) until seated in and through the diaphragm; stiff opposed portions (176) of the top edge (154) of the grommet close after being deflected temporarily as the cable is urged therepast; thin resilient opposed strips (170) of the diaphragm (168) similarly close upon said cable being urged therepast, while strips (170) adjacent the cable remain deflected by and biased against the cable. Upstanding wall sections (50,52) of the enclosure wall (36) are received through apertures (164) through the grommet and latch therewith.

Abstract: An annular guard (20) for mounting on a high voltage insulator extends laterally thereof for a sufficient distance so as to prevent small wildlife such as squirrels from forming a short circuit between the opposing ends of the insulator at high voltage and earth potential respectively. The guard (20) is formed in two planar parts (24, 26) that are pivoted together (28) so that they can be relatively rotated between an open condition for mounting onto a live insulator and a closed condition for being secured thereto. Overlapping regions of the two parts are secured together (30, 32, 34, 36, 38) in the closed condition.

Abstract: A bushing has a central conductor, and a plurality of internal shield rings. Gaps are formed between the shield rings such that equipotential lines extend through gaps. Electric field concentration in a tangential distribution on a part of the surface of the bushing corresponding to an upper part of an internal shield ring is relieved to prevent corona discharge under wet conditions, and antipollution performance and withstand voltage characteristics can be improved.

Abstract: An electronic structure, and associated method of formation, in which a plated metallic layer such as a copper layer, of a plated through hole (PTH) is adhesively coupled to holefill material distributed within the PTH. The holefill material includes a resin such as an epoxy and optionally includes a particulate component such as a copper powder. The adhesive coupling is accomplished by forming an adhesion promoter film on the plated metallic layer such that the adhesion promoter film is bonded to the resin. The adhesion promoter film may include a metallic oxide layer such as layer containing cupric oxide and cuprous oxide, which could be formed from bathing the PTH in a solution of sodium chlorite. Application of a reducing solution of dimethylamine borane to the cuprous oxide layer would convert some of the cuprous oxide to cupric oxide in the metallic oxide layer.

Abstract: A sealing mechanism is provided to seal a lead from a closed cavity of an apparatus. The sealing mechanism includes a mounting portion sealingly connected to the apparatus, a cap member having a recess defined therein with an elastomeric grommet compressively disposed in the recess. The elastomeric grommet has a passageway defined therethrough for the lead from the closed cavity to past through. The compressive forces induced into the elastomeric grommet applies a compressive force on the lead to provide a seal. The cap member is sealingly connected to the mounting portion. Consequently, the closed cavity in the apparatus is effectively sealed from the atmosphere and contaminants cannot enter the closed cavity and create premature failure of the component therein, such as, for example, an electrical coil.

Abstract: The invention concerns a bushing device (12) designed to be fitted through a hole in a wall including a body (20) and a cover (18) each adapted to be disposed on one side of the wall and rod and connection (14, 16) for connecting the body (20) and the cover (18) to grip said wall between them, the body (20) and the cover (18) including aligned passages (22, 47) adapted to receive a conductive rod (14). The cover (18) includes an inner core (44) delimiting the passage (47) for receiving the rod (14) and an outer sheath (46) covering the lateral wall of the inner core (44), the inner core (44) and the outer sheath (46) being made of different materials.

Abstract: A snap in locking cable connector is composed of two mating pieces that snap together and provide a connector for armored or metal clad electrical conductors. One piece includes a die cast member including a smooth outer cylindrical section having an inner diameter that may accommodate a spring steel adaptor with flanges to hold the spring steel adaptor in place. The spring steel adaptor is used in conjunction with an electrical junction box to fix the location of the locking cable connector with respect to the junction box. Another piece includes a spring steel locking ring provided to receive an armored cable and lock into the die cast member. The spring steel locking ring has tangs allowing unidirectional insertion into the die cast member and restricting withdrawal motion from the die cast member. The spring steel locking ring also includes oppositely directed tangs to permit reception of the armored cable in one direction and restrict its movement in the reverse direction.

Abstract: An insulator in the form of suspension insulator or pin type insulator has an elongated load sustaining body with a plurality of weathersheds extending radially relative to the longitudinal axis of the body on the outer surface of the body. The body and weathersheds are unitarily formed as one piece of rigid dielectric plastic polymer which are molded together. Clevis and eye coupling means are provided on the ends of the body to facilitate connection to support structures and high voltage lines.

Abstract: This invention secures the breakdown voltage between stem pins or the like for high voltage service in a cathode ray tube. This insulator is formed of a clay-like silicone compound having a tip-throughhole and pin-throughholes or a stem base with the electric insulator mounted to the stem base. An inter-stem electric insulation device is structured by mounting either one of the electric insulator or the stem base with the electric insulator to the stem of a cathode ray tube and by pressing to fix together. This structure does not allow bubble generation caused by the electric insulator, and makes the handling easy, and furthermore, allows an automatic mounting of the electric insulator to a stem.

Abstract: A grommet used in an automobile reduces noise leakage from the engine compartment to the passenger compartment. It is made of rubber or an elastomer, and it includes a small tube portion, through which a wiring harness is passed, a frustoconical tube portion flaring from an edge of the small tube portion and a flared portion, on the outer surface of which is formed a recess for fitting into a body panel. An internal tube portion through which the wiring harness is passed extends axially from the small tube portion in the frustoconical tube portion, and a closing portion is connected to the flared portion and to the edge of the internal tube portion distal to the edge of the small tube portion.

Abstract: A grommet assembly includes a main grommet body including first and second surfaces opposite one another. The first surface includes a sealing portion. A pivotable pressing member operatively associated with the main grommet body applies a pressing force to the second surface. The grommet assembly may include a rigid plate member including opposed tabbed hinge portions that receive a pivotable arm pivotable between a first position to apply a pressing force to the sealing portion and a second portion to release the pressing force. The grommet assembly may be attached to a vehicular wall panel by inserting the grommet into an opening of the wall panel, engaging a pressing member associated with the main grommet body with a bracket mounted on the wall panel, and pivoting the pressing member to apply a pressing force that seals connection between the main grommet body and the wall panel. The method may be carried out without accessing or modifying an interior portion of the wall panel.

Abstract: An apparatus for electrically insulating and supporting a power supply wire relative to a substantially planar boundary, is disclosed. A translucent insulator is formed from a supercooled, nonporous igneous magma, such as glass, and includes a head and a shank extending from the head, the shank extendable through an opening in the boundary. The head and the shank form an annular passageway for receiving disposition of the wire. A shoulder surface limits the extension of the shank through the boundary opening and a retaining member, such as a nut, engages corresponding features of the shank to secure the insulator relative to the boundary. A seal can be additionally provided to engage the head and the wire to further seal the insulator.

Abstract: An improved high voltage insulator includes a central core and an insulating body fitted tightly around the central core. A flexible coating layer is interposed between a part of the central core and the insulating body. The flexible coating layer fills in shrinkage cavities and compensates for a retraction effect caused by injected material used in forming the insulating body. The insulating body is overmolded to the central core previously coated with the flexible coating layer with an injected insulating resin such as a thermoplastic or thermosetting resin. The insulator could be used as a capactive divider or bushing insulator.

Abstract: A supporting insulator has an insulator body in the form of a disk and is made of a cured casting resin, and has at least one cast-in fitting to which high voltage is applied and which is cast in the insulator body and passes therethrough. The cast-in fitting has a cylindrically constructed outer surface which the insulator body encloses. A lip which tapers outwards and is closely connected to the outer surface of the cast-in fitting, is integrally formed on the insulator body. The lip mechanically decouples an edge zone of the insulator body from the actual insulator body.

Abstract: A supporting insulator for installation between connecting flanges of a gas-insulated switching installation is provided with an outer ring, with an insulator body which is in the form of a disk and which is formed of a hardened cast resin, and with at least one cast fitting which is subjected to high voltage and is cast in the insulator body. The outer ring need not be assembled with the insulator body until after the outer ring has been colored. The outer ring includes two identically constructed rings that are joined together in a separable, but positively locking manner such that the insulator body can be separated from the outer ring when the rings are separated.

Abstract: A terminal assembly is provided which is easy to assemble and disassemble. The assembly features male and female ceramic elements that interconnect and provide a passageway into which a terminal equipped with forward and rearward tabs is placed. After the terminal is positioned in the passageway, the forward tabs may be bent into a position at an angle to the terminal, thereby securing the terminal in place and holding the terminal assembly together. The male ceramic element is provided with a unique annular depression that reduces the amount of ceramic materials needed to make the assembly, while also providing the minimum surface spacing required by industry standards. In addition, the terminal assembly is provided with a v-shaped attachment element for conveniently attaching the assembly to a lead wire.

Abstract: The electrical insulator includes a laminated tube serving as a support for a covering of elastomer material constituting a plurality of annular fins which project from the tube. Two circular grooves and a helical groove are formed in the outside wall of the tube for receiving the optical waveguide. The circular grooves are parts of bearing surfaces which are formed at the ends of the tube and to which end fittings of the insulator are secured. The optical waveguide is embedded in the elastomer material and at the bottoms of the grooves.

Abstract: The present invention permits solder joints to be made directly to via and through holes without the solder being wicked into the vias or through holes, by filling plated through holes with an epoxy or cyanate fill composition. When cured and overplated, the fill composition provides support for the solder joint and provides a flat solderable surface for the inter-connection. In certain embodiments, the cured fill compositions, offer a further advantage of being conductive. The invention also relates to several novel methods for filling through holes with such fill compositions, and to resistors located in through holes and vias.

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: A wireholder includes a main body portion, an attaching portion, and a tool receiving portion. The main body portion is arranged to receive a wire to be secured to a structure. The attaching portion is affixed to the main body portion and has a configuration to facilitate the attachment of the main body portion to the structure. The tool receiving portion is arranged to receive an installing tool. The main body portion has a strength so that torque can be transferred from a power tool to the attaching portion through the installing tool and the main body portion. The installing tool is arranged to break if excessive torque is applied to the wireholder by the installing tool.

Abstract: A composite link and insulator, and method of construction, includes a fiberglass body. The body is formed by coating glass fibers with a liquid resin and winding the fibers around a plurality of tubular fittings or bushings in two layers, a first extending longitudinally of the body and the second transversely and around the first. A polymer shield layer and weathersheds are injection molded over the fiberglass body to create an insulator. The insulator may also be provided with stiffening plastic inserts at either end for increasing strength without adding significantly to the insulator's overall weight.

Abstract: A composite link and insulator, and method of construction, includes a fiberglass body. The body is formed by coating glass fibers with a liquid resin and winding the fibers around a plurality of tubular fittings or bushings in two layers, a first extending longitudinally of the body and the second transversely and around the first. A polymer shield layer and weathersheds are injection molded over the fiberglass body to create an insulator.

Abstract: An improved, failure-resistant, low mechanical stress electrical connector bushing (10) is provided which includes an elongated, central metallic conductor rod (12) with an insulative epoxy body (14) cast about the central rod (12). The rod is of substantially constant diameter throughout its length, and includes a male connection end (16) and an opposed female connection end (18). The connection end (18) presents an upset, integral, cold-forged, radially expanded terminal portion (20) having a diameter greater than the constant diameter rod (12), and presents a butt end face (24). Stress analysis confirms that the bushing (10) develops reduced, mechanical thermally induced stresses, as compared with a prior design.

Abstract: A cable protector for insertion into the open end of a duct or conduit for preventing a cable pulled therethrough from being damaged by the edges of the duct or conduit. The cable protector has a substantially C-shaped cross-section and includes a turned-over lip which encapsulates the end of the duct and prevents the cable protector from being pulled into the duct or conduit. A groove at the juncture of the lip and a curved transitional portion facilitates folding of the cable protector to allow insertion thereof into a variety of sizes of ducts or conduits. Ribs located on the external surface of the body of the cable protector ensures a substantially tubular configuration of the protector after its diameter has been reduced to fit into the intended duct or conduit. The inside surface of the cable protector may be textured to minimize friction.

Abstract: A feedthrough bushing for a high voltage diode provides for using compression sealing for all sealing surfaces. A diode assembly includes a central conductor extending through the bushing and a grading ring assembly circumferentially surrounding and coaxial with the central conductor. A flexible conductive plate extends between and compressively seals against the central conductor and the grading ring assembly, wherein the flexibility of the plate allows inner and outer portions of the plate to axially translate for compression sealing against the central conductor and the grading ring assembly, respectively. The inner portion of the plate is bolted to the central conductor for affecting sealing. A compression beam is also bolted to the central conductor and engages the outer portion of the plate to urge the outer portion toward the grading ring assembly to obtain compression sealing therebetween.

Abstract: A flexible housing, for use in protecting one or more transmission lines in a pressurized environment comprises a conduit (10) contained within a protective outer jacekt (16). The conduit (10) is constructed of a plurality of conduit segments (18a and 18b), each segment having an opening (28) therethrough, the segments (18a and 18b) being arranged in series and caused to abut adjacent segments in such a way that the opening (28) through each segment (18a and 18b) is in communication with the openings through each of the adjacent segments so as to provide a passage to contain a microwave transmission line. Each segment (18a and 18b) is flexibly linked to its adjacent segments by coupling means (34).

Abstract: A cable termination assembly for terminating a high voltage current-carrying conductor includes an outer porcelain housing and an inner polymeric liner of low durometer, cast in the housing before insertion of the cable. The liner is bonded to the housing wall to prevent air voids. A metal base member amy be employed and may include an upstanding shielding collar extending part way into the housing and being joined thereto by the cast liner.

Abstract: A high voltage insulator that has a helical configuration in which successive turns are axially spaced apart, and an exposed surface of insulating and substantially non-tracking material. The helical configuration provides a long creepage path length and an ability to shed water. The insulator is sufficiently rigid for it to provide a support, for example, for a high voltage cable or for a fibre optic cable.

Abstract: An electrode structure used in a glow discharge system for nitride hardening of metals. The structure includes an anode plate, a cathode plate, a conductor connected to the cathode plate and an insulating dielectric shroud which surrounds the conductor. The two plates are firmly attached to the dielectric shroud so as to prevent any air gaps across which an arc may form. The shroud includes a plurality of annular grooves at one end to prevent the surface of the shroud from being covered by extraneous matter which would allow an arc to form between the plates.

Abstract: An insulator for supporting a conductor of an electric fence on a support post in which the insulator is an elongated sleeve formed of a dielectric plastic material. The sleeve has a bore which slidably receives the conductor therein and is formed with a plurality of ribs which extend longitudinally along the conductor and in a radially outwardly extending direction. The ribs are formed integrally with the sleeve and of the same dielectric plastic material. Two of the ribs abut against the fence post to position the sleeve whereby at least one of the ribs extends outwardly from the sleeve. This outer rib is indented by the web portion of an attachment staple, the legs of which are embedded in the post and trap the sleeve therebetween. This indentation of the outer rib prevents the sleeve from sliding along the conductor and out of contact with the post without the use of any fasteners that pierce the insulator sleeve body.

Abstract: A funnel-shaped support insulator is mounted by its insulator outer edge in a recess of a grounded housing and has an orifice which is provided at a distance from the housing and in which a high-voltage conductor part is retained. To prevent, in this insulator, inadmissible field increases and glow discharges associated with these in the region of the outer edge of the insulator, the insulator has a wall thickness decreasing from the orifice to the outer edge of the insulator. A plurality of lobes engaging the housing are located at the outer edge of the insulator. An insulator of this type is to be used preferably in metal-encased high-voltage switch gear.

Abstract: A wiring harness has a main bundle of leads disposed in an axially slit, corrugated tube and break-out leads disposed in a break-out protector which extends through the slit of the corrugated tube. The break-out protector is a one piece molding of thermoplastic material. It has a tubular body with an outwardly flared skirt at one end which is disposed in the corrugated tube. The tubular body has an axial slit and the annular skirt has a communication slot for assemblying the break-out protector around the break-out leads. The tubular body has wedge-shaped portions and the annular skirt has a wavy edge to assist in assembly.

Abstract: A composite profile spacer for use in compressed gas insulated co-axial electrical cables. The cables have a central conductor and an outer envelope conductor and an insulating gas contained therebetween. The spacer comprises a composite profile shaped body formed of an electrically insulating material and extends radially between the central conductor and the envelope conductor to support the central conductor substantially concentric with the envelope conductor. The body has a disc section configuration in a first support section adjacent the central conductor, and a cone-section configuration in a remaining support section extending to the envelope conductor whereby to obtain substantially uniform field distribution and low field intensity on the opposed surfaces of the spacer. The contact angle between the opposed surfaces and the central conductor is approximately 75.degree. and the insulating material is an epoxy having a relative dielectric constant of 5 or higher.

Abstract: Discharge electrodes in electrostatic precipitators are protected from erosion caused by power arcs in the area along their length which is closest to the ground electrode plates by a shroud of high temperature insulating plastic such as Teflon. The shroud is formed in two longitudinally slidable interlocking sections which completely surround and insulate the electrode wire but can be assembled to the wire without disturbing its ends.

Abstract: An insulator for supporting a high voltage conductor within a gas-filled grounded housing consists of radially spaced insulation rings fitted to the exterior of the bus and the interior of the grounded housing respectively, and the spaced rings are connected by trefoil type rings which are integrally formed with the spaced insulation rings.

Abstract: Method of passing an uninsulated, relatively rigid, conductor through an opening in a non-conductive housing wall. The conductor has a cross-section which is substantially less than the cross-section of the opening yet is firmly maintained in place by means of a rivet which presses a portion of the conductor against a surface surrounding the opening.