Abstract: An electric power busway system comprises a bus bar support housing with the opposite side plates of the housing shaped with troughs to hold the bus bars in their relative positions, preventing the bus bars from moving towards or away from one another and providing the necessary short-circuit protection and bending resistance. The metal side plates are preferably fastened together without the use of fasteners or the need for welding, through the use of a punch and die tool set. A protective insulating sheet is sandwiched between the insulated bus bars and the housing to protect the bus bar insulation coating from ruptures or tears. Clamping blocks are provided outside the protective busway housing to apply friction on the bus bars within, keeping them from sliding out of the housing assembly. The integral busway housing and clamping serve as a ground conduction facility, with the clamping blocks providing a mechanism to connect the busway section to an adjoining section.

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: A bus bar of a branch joint box, which is formed by punching a metal sheet into a preset pattern of a circuit and is formed, at a predetermined location of the circuit, with a tab to be plated with metal having excellent electrical conductivity such that a connector of a wiring harness is connected to the tab through plug-in, including a separate bus bar portion which is formed by punching a separate metal sheet and includes the tab; wherein after the tab of the separate bus bar portion has been plated with the metal, the separate bus bar portion is inserted into a predetermined portion of the bus bar so as to be mounted on the bus bar.

Abstract: The present invention locates the primary winding of a transformer in a configuration where it substantially surrounds the secondary winding of the transformer in order to enhance the efficiency of the electromagnetic coupling. High magnetic permeability material surrounds portions of the primary winding of the transformer. The transformer is designed to efficiently operate at frequencies of approximately 50 kilohertz. In one preferred embodiment, the primary winding of the invention is formed of two U-shapes in which the parallel members of the U are substantially longer than the bottom portion of the U. The two U-shapes form a rectangular shape and the substantially parallel rectangular portions are surrounded by high magnetic permeability material to further enhance the electromagnetic coupling between the primary coil winding and the secondary coil winding. In another embodiment, the primary winding of the invention may be rectangular in shape.

Abstract: A flexible laminated jumper is formed from a stack of half hard tempered copper sheets. Contact plates are clamped to opposite sides of one end of the stack, such plates being provided with short stress relief sections away from the end of the stack. The clamped end is positioned properly in a press welder so that the fiat portion of the contact plates are gripped by graphite electrodes of a press welder. The gripped end of the stack is then press welded while the balance of the stack is cooled so that the heat from the press welding does not affect the temper of the sheets of the stack. This is preferably done by immersion in chilled water with the water level being in close proximity to the electrode. After the press welding, the entire stack is cooled and the still tempered stack is formed to the desired configuration.

Abstract: A busway and insulator assembly for use with the busway are described. The insulator assembly provides access to the conductive busbars through the busway housing and is configured for use with plug-in tabs which extend from the outer edges of the busbars. The insulator assembly includes a base having openings therethrough for cooperation with each plug-in tab. Insulated stabs extend from the insulator base and are disposed between the plug-in tabs-to prevent arcing between the tabs and exposed areas of the busbars. Additionally, the insulator base includes track members for slidably receiving an insulated cover which may be moved into a position blocking access to the plug-in tabs or moved to a position permitting access to the plug-in tabs.

Abstract: A low inductance bus bar arrangement suitable for industrial voltage levels, and for power applications contains two or more elongate electrical conducting bars having rounded edges. Strips of dielectric insulating material are located between two of the elongate electrical conducting bars. The conducting bars are oriented in substantially parallel relationship to one another with the dielectric insulating material having a height of the cross-section thereof substantially greater than the height of the cross-section of the conducting bars. The bus bar arrangement also provides low inductance to the connecting devices.

Abstract: A flexible laminated jumper is formed from a stack of half hard tempered copper sheets. Contact plates are clamped to opposite sides of one end of the stack, such plates being provided with short stress relief sections away from the end of the stack. The clamped end is positioned properly in a press welder so that the flat portion of the contact plates are gripped by graphite electrodes of a press welder. The gripped end of the stack is then press welded while the balance of the stack is cooled so that the heat from the press welding does not affect the temper of the sheets of the stack. This is preferably done by immersion in chilled water with the water level being in close proximity to the electrode. After the press welding, the entire stack is cooled and the still tempered stack is formed to the desired configuration.

Abstract: A circuit breaker has a line terminal comprising a pair of vertically spaced resilient terminal strips which extend in the transverse horizontal direction out from the breaker's housing to free ends of the strips, and which strips have formed therein near those ends respective bends disposed opposite each other and vertically projecting away from each other to bound opposite sides of a circular cylindrical cavity defined between those strips. A horizontal rail for conducting current is aligned in its lengthwise direction normal to those strips, and the rail has a flange received in the cavity in electromechanical contact with the strips, and also, a web extending in the transverse horizontal direction from the front flange out beyond the terminal to a rear flange for the rail. The shape, size and mass of the rail promote reduction of the temperature generated at the line terminal by the inrush of current carried by the rail in the presence of a short circuit in the load served by the breaker.

Abstract: A method for increasing electron flow and enhancing electrical conductivity in an electrical ribbon conductor by providing a plurality of parallel bridges spanning the ribbon conductor from one edge to the other, connecting them electrically, insulating the bridges from the surface of the ribbon conductor and from adjacent bridges, and generating or externally supplying a magnetic field along the direction perpendicular to the ribbon surface. Also disclosed is an electrical ribbon conductor apparatus which produces enhanced electrical conductivity, and has a two or three tiered structure with a plurality of parallel bridges spanning the ribbon conductor from one edge to the other, connecting the edges electrically, and insulated or spaced from the surface of the conductor and from adjacent bridges.

Abstract: A protective casing for preventing any accidental introduction of metal parts into a column containing an array of electric distribution busbars is made up of two identical insulating half-casings (3) coupled together by interengagement of external engagement regions (18A, 20A, 22A, 24A) and of internal engagement regions (18B, 20B, 22B, 24B) up to a mutual coupling position which is variable according to the dimension of the busbars. The busbars are inserted in housings (29, 30) and pass through recesses (9A, 11A, 11B, 9B, 13) in the lateral walls of the casing. Fixing bolts extending between the busbars are surrounded by insulating sleeves (21) formed by interpenetrating outer and inner tongues (23 and 25) separated by slits (36). The sleeves (21) are made integral with the half-casings by molding of plastic material.

Abstract: An electromagnetic railgun having a layer of low conductivity material along the rails to interface with the armature as the armature is propelled along the rails. The low conductivity material has been found to permit rapid current penetration between the layer and armature, thereby inhibiting undersirable high current density formation along the trailing edge of the armature. Advantageously, inhibiting the high current density formation permits use of a solid armature at velocities exceeding on kilometer per second. Preferably, the layer is composed of graphite or a graphite/copper mixture. A layer of copper or other high conductivity material is preferably laminated to the low conductivity graphite layer to reduce the overall railgun circuit resistance. In the preferred embodiment, the layer of low conductivity material increases in thickness from the breech to the muzzle to decrease railgun circuit resistance.

Abstract: A bus bar for power supply is comprised of a pipe-shaped outer conductor and at least one inner conductor inserted therein. The inner conductor is also formed in a pipe shape and serves as a coolant flow passage. Insulation is interposed between the outer conductor and the inner conductor to electrically isolate them from each other.

Abstract: A versatilely cnnectible bus bar assembly adapted to carry 200-800 amperes in a panelboard or switchboard environment. The assembly includes a plurality of aluminum bus bars having generally rectangular cross-section bases and integrally connected generally U-shaped cross-sectioned plug-on protions extending throughout the length of the bus bars along the top part of the base. The plug-on portion is provided with inwardly directed nubs designed to prevent improper jaw connection. The bottom of each base includes a T-shaped slot extending throughout the length of the bus bar. Each of the bus bars is supported by a plurality of insulating bases, each of which includes a separate channel in engagement with the base of each bus bar. Each bus bar is fastened to each base by a T-bolt and nut. The head of the bolts are received in the T-shaped slot of the bus bars and the nuts are received in recesses provided on the underside of the base.

Abstract: Lower extremities of two structural, component-carrying columns are affixed to two channel members that are coupled to a base frame. The columns, members, and frame form a free standing assembly. Two other channel members, coupled to a top frame, are affixed to the columns' upper extremities. Corner posts couple the top and bottom frames.A bus bar is supported within frames and corner posts by an insulated elongated steel member having a through bolt hole. Two insulating washers seat within the hole at opposite sides thereof. A metal bolt fits within the washers and hole. A nut engages with the bolt. A flat washer fits between the bolt and one washer.A plurality of bus bars carry and distribute current at a particular voltage at a first phase. A similar plurality carry and distribute current at other phases. All bus bars are oriented parallel to one another spaced interjacently: first phase, second phase, third phase, first phase, second phase, etc.

Abstract: A control center characterized by vertical bus bars supported by dielectric insulators which are disposed in vertically spaced pairs along the bus bars and which are molded with a configuration to accommodate bus bars of various shapes and sizes.

Abstract: A control center characterized by vertical bus bars having bent-over portions forming a U-shaped cross section adapted for engagement by clip-on contacts of a circuit interrupter.

Abstract: A bus bar, for electrical switchboards comprises an elongated extruded imperforate metal bar of rectangular cross section having slots, with parallel side walls, extending the entire length thereof. Some of the slots are of T-shape cross section, each with the T-leg portion opening through a face of the bar. Others of the slots are rectangular grooves of generally uniform width, with smaller V-shaped grooves on opposite sides to accommodate threaded end portions of bolts or screws, and each opens through a face of the bar. T-bolts are arranged with their heads in, and slidable along, the full length of selected ones of said T-slots, respectively, to any desired position. The bolts have threaded stems, each of which extends from its associated head through the leg portion of the T-slot in which its head is disposed, and beyond that face of the bar through which the associated T-slot opens. Each stem is adapted to threadably receive a nut for clamping supporting or connecting brackets to the bar.

Abstract: A control center characterized by a metal enclosed upright cabinet having a plurality of vertical bus bars therein, which bus bars are separately insulated and isolated from each other. The assembly of the bus bar and insulation barriers is supported and reinforced by a plurality of vertically spaced braces to prevent lateral movement of the bus bars as well as to hold the insulating barriers in tight surface-to-surface contact with the bus bars.

Abstract: A composite section with a body mainly of light metal which has embedded in it inserts of a metal of higher strength. The inserts are not round in cross section and engage in the matrix by virtue of their shape.

Abstract: A rail construction for rail-type electrification systems, comprising a conducting rail member having a cross-sectional configuration somewhat like a pair of channel shapes disposed back to back. One channel shape is used for suspension or mounting, as well as rigidity. The other channel shape contains a stainless steel insert in the form of a flat contact member which is secured in place by being pinched between opposed wall areas of flanges of the rail member, in consequence of the flanges being swaged or displaced beyond their elastic limit to effect a gripping of the contact member. The inner walls of the flanges, which adjoin the elongate contact member, constitute metal guideways that assure a positive tracking of the collector shoe. Any small relative movements between the conducting rail member and the stainless steel insert, as occasioned by temperature changes for example, cannot result in loosening of the insert or deterioration of the electrical conductance thereto.

Abstract: The power line comprises a conducting section enclosed in an electrically insulating casing open on one side. The section and the casing are hung by claws. At least one claw is designed to block the conducting section and the casing. Expansion joints are designed at some intervals, and end elements prevent any access to the conducting section which is electrically supplied by junction units included in the end elements connecting two adjacent segments.