Abstract: The present invention relates to an improved grommet for protecting wires and tubes that must be placed thru apertures in building panels or studs made of steel or the like. The grommet disclosed here includes a single piece, soft plastic body having any configuration, (e.g. polygonal, round, oval, semi-circle, or even polygonal with curved edges) which is flanged along its periphery. On one side of the outer surface of grommet body's wall are arranged one or more protruding, male nubs which securely hold, in the gap formed between the wall flange and said male nubs, the rims of the aperture in a metal stud.

Abstract: A cable re-entry assembly for feedthroughs and the like is provided. The preferred embodiment includes an expansion mandrel positionally secured on the conduit with a heat shrinkable locking ring, a transition boot with a heat shrinkable sleeve portion and a rigid body portion which couples to a feedthrough nut, and a sealant between the conduit and the sleeve. Upon re-entry and re-use of the assembly, the mandrel mechanically expands the sleeve, when the sleeve is re-heated above its crystalline transition temperature, the expansion mandrel is translated against the sleeve and both the conduit and expansion mandrel are withdrawn from the sleeve. Following repair, the conduit is reinserted into the dimensionally unstable sleeve which is then heated to shrink about and reseal the conduit.

Abstract: A breakaway connection device is provided which is particularly suited for use with residential electric service cables. This device is mounted between the service cable and the service pole and serves to disconnect the cable from the pole upon the application of a predetermined level of tension or force to the cable. That level of force is selected so that the service cable breaks away from the pole and de-energizes the conductive wires before the service cable would pull away from and damage the dwelling. This device includes an insulated sheath having therein two hollow wire receiving elements which are separably joined by a conductive insert, formed as a solid rod or threaded member.

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: A protective housing for electrical outlets and the like includes a box surrounding the outlets and a cover. A gasketless joint is formed between the hinged cover and the box for inhibiting entry of moisture into the box. The box includes a slot in its peripheral wall for receiving a cord with a plug that is positioned inside the box.

Abstract: A gangable electrical box includes a main body and a pair of removable sidewalls. The main body has opposite side edges, each side edges having a pair of flanges extending from a midpoint on a rear panel and along the end panels. The sidewalls include flanges along each transverse edge and a pair of flanges on the longitudinal edge. The flanges on the sidewall are formed to complement the flanges on the main body to overlap with each other in a coupling relation. The main body and sidewalls are formed from a folded blank. The flanges of the main body are arranged so that a plurality of identical main bodies can be ganged with the flanges of a first main body telescoping with the flanges of a second main body.

Abstract: An electric busbar for use with an electrical power distribution busway system which includes a press formed plug-in tab configured for attachment to a connector at a power tap-off section of the busway is described. The busbar has a substantially rectangular cross-section, a length, a width defined by a pair of edges, and a thickness defined by a top side and a bottom side. The plug-in tab is formed by pressing the conductive material in a direction generally perpendicular to the top and bottom sides until material is displaced outwardly from at least one of the edges. Depressions are formed in the bar of conductive material at the location of the press formed tab. In the most preferred embodiment, the volume of the depressions is substantially equal to the volume of the material in the tab.

Abstract: An environmentally sealed electrical connector for use with a load cell block. The connector includes a jacketed cable that extends through a pliable connector block. The connector block is injection molded directly around the cable to insure an environmental seal between the cable and the connector block. The connector block includes a cylindrical protrusion that extends downwardly into a passageway in the load cell block. A double-sided adhesive gasket is located between the load cell block and the connector to help form an environmental seal between the connector and the load cell block and to help attach the connector to the load cell block. The connector is attached to the load cell block using four fasteners that extend through a stiff pressure plate, the connector, and are received by holes in the side of the load cell. As the fasteners are tightened, a force is placed on the pressure plate, which in turn compresses the connector block into the load cell block, establishing an environmental seal.

Abstract: A metal plate sleeve and method of manufacture is obtained by placing the cables (15) on strips of rubber-base putty, then compressing the whole into the corresponding shape, followed by crown molding until the described shape of the anchoring zone (14) is obtained, forming a metal plate sleeve (10) for a bundle of cables (15), configured in accordance with the first lower truncated cone area (10b), extending on top into a cylindrical portion (21), which in turn extends on top into a truncated cone area (10a). A cylindrical portion (21) expands outward in accordance with the respective cover shields (12) and positioning shields (13).

Abstract: The post insulator (6) has an insulator body (8), of cured cast resin, which can be subjected to a pressure medium, and at least one potted fitting (11) penetrating the insulator body (8) and subjected to high voltage. The metallic support body (12) has a lateral surface (15). The intention is to obtain a post insulator which is of simple structure and which is designed for comparatively high mechanical loading. This is achieved by providing the lateral surface (15) of the support body (12) with a bonding layer (13) which adheres better to the lateral surface (15) than the cured cast resin. The cured cast resin is cross-linked with the bonding layer (13).

Abstract: A strain relief arrangement includes a strain relief, a shield bead, a shrink tube, and an outer jacket. The strain relief includes a hub and a plurality of spokes extending outwardly from the hub. The hub forms a channel for permitting passage of one or more wires therethrough. The shield bead is disposed within the channel of the hub. The shrink tube is disposed adjacent to the strain relief. The outer jacket is composed of woven material and is braided over the shrink tube and over the hub of the strain relief with the plurality of spokes protruding through the braided outer jacket.

Abstract: The entire outer surface of a ground rod, including its pointed end portion, has a continuous and uniform electroplated coating. The rod has a blunt end portion shaped to minimize mushrooming when it is hammered for driving the rod into the ground. Jets of plating solution directed against the rod produce swirling motion of plating solution around the rod while it moves longitudinally through a plating bath. Uniformity of the plated coating may be enhanced by rotating the rod during longitudinal movement through the plating bath.

Abstract: A circuit insulating plate is interposed between neighboring ones of bus bars provided in stages in an electrical connection box. A portion, which confronts a plurality of tabs projecting at a short interval from one of the neighboring ones of the bus bars, includes a through-opening having a large area such that the tabs are passed through the through-opening. A rib extends along a peripheral edge of the through-opening, and the area is set so that the rib fits closely within a through-opening of an adjacent circuit insulating plate.

Abstract: A duplexer, useable to interlink the receiver, transmitter and antenna units of a microwave transmit/receive system takes the form of a "T" junction coupling device and three coaxial lines extending from junction ends at such device to coaxial end connectors on the ends of such lines away from such device. The "T" junction coupling device comprises a copper block having a central cavity and three bores leading into such cavity, a copper cap to close the top of such cavity, a copper disc disposed in said cavity away from its walls and containing a central space and three passages leading into said spaces and corresponding to said bores, and three brass ferrules for such lines. The ferrules are seated on the junction ends of such lines and are soldered to their outer conductors and are pressed fitted into the three bores. The inner conductors are received in the three passages in the disc and are all soldered thereto.

Abstract: A computer dust filter cover comprises an open cell synthetic foam sheet formed into a bonnet-like arrangement by an elastic strap. The cover is readily attached and removed from the computer housing front or side panels to cover the disc slots while the computer is in use and without interfering with the use of the computer. The cover can remain in place when the computer is not in use to protect the interior of the housing and parts therein from contamination by particulates at all times.

Abstract: A conductor splice and splice support structure and method of assembly for use with cable-in-conduit superconductor cable of the type having a plurality of spaced sub-cables each including stabilizer and superconductor strands in an annular tube. Two transition ramp members, each having a cross section varying from a first end conforming to the cable configuration to a second end having an enlarged, oval, configuration have a plurality of surface grooves each sized to hold one sub-cable. Between the two transition ramp members is provided a main support member having grooves aligned with the transition members grooves. The main support member grooves are sized to hold two overlapping sub-cables. Preferably, a braid of superconductor material is placed around the overlapping sub-cable ends. The space within the grooves surrounding the sub-cables is preferably filled with solder.

Abstract: An organizer for securing a plurality of insulated electrical conductors such as PC interconnect and power cables. The organizer comprises a body constructed of a single piece of thin, flat, flexible fabric having a rectangular configuration with first and second end edges and first and second side edges. A fastening mechanism is attached to the side edges to bring them together as the body is wrapped around the cables. The fastening mechanism is preferably a zipper, straps or a hook and loop type fastener. One of more access apertures may be disposed in the body.

Abstract: A cable sealing gland includes a housing adapted to be fitted in an opening in a bulkhead and defining a receptacle closed at one end by a silicone rubber membrane backed by a rigid plastic material support insulator which is apertured to permit the passage therethrough of electrical cables or the like which are pierced through the membrane. A second support insulator is spaced apart from the first-mentioned support insulator and the space between the two support insulators is filled with a silicone rubber sealing composition. A by-pass tube extends through the two support insulators and enables access to be obtained through the gland even after it has been sealed.

Abstract: A grounding structure for use in an electric appliance of the type including a pivotable door attached thereto, which has a plurality of knobs and a conductive bracket. The grounding structure includes two members, a supporting conductive plate and a resilient conductive plate. The two members maintain a continual engagement with each other at any state of the door so that electrostatic charges appearing on the knobs and the door can be effectively discharged through a front panel of the electric appliance.

Abstract: A three component electrical outlet box suitable for surface mounting is provided with a base having both locating legs and relatively rigid upstanding posts that are adapted to receive one of a plurality of covers, each cover having inwardly projecting lugs in its flexible side walls to be received in openings defined for this purpose in the posts. An electrical device such as a duplex plug with threaded fasteners supplied thereon is adapted to be assembled with the outlet box as a result of the fasteners being received in unthreaded openings defined in the top wall of the box or cover. The flexibility of the box side walls coupled with a bisector slot provided in each top wall end portion parallel the side walls assures entry of the threaded fastener without threading, and removal of the fastener only by unthreading or by manually spreading the slots side walls.