Abstract: In a preferred embodiment, an audio signal interconnect cable, including: at least two thin, flat conductors and a flexible jacket surrounding the at least two, thin, flat, conductors. Each of the at least two, thin, flat conductors may have a width on the order of from about 2 to about 6 mm and a thickness on the order of from about 50 to about 100 microns.

Abstract: An electromagnetic relay, having ON and OFF states, for connecting a source of electrical current to a load, said relay comprising: an armature movable between ON and OFF positions corresponding, respectively, to said ON and OFF states of said relay; a magnetic core surrounded by first windings forming a holding coil to magnetize said core when a first portion of electrical current is passed through said holding coil and consequently to cause said armature to move from said OFF position to said ON position as a result of a magnetic attraction produced between said magnetic core and said armature, resulting in causing a second portion of electrical current to flow through said load; said magnetic core additionally surrounded by second windings forming a load coil through which said second portion of said electrical current flows when said armature is in said ON position, said load coil producing a magnetic field which counteracts a magnetic field produced by said holding coil; and parameters of said load coil

Abstract: A manually operated on-off switch comprising a frame with a magnetizable core surrounded by windings, and a spring loaded armature moveable between open and closed positions relative to the frame, the armature carrying a plurality of moving contacts which interact with stationary, normally open and normally closed contacts, and a manual rocker or toggle operator or the like attached to or acting upon the armature and serving to either close it against the spring action until it is held closed by electromagnetic force, or break it open against said holding force; a second embodiment of the switch described above comprising in addition a separate winding consisting of relatively few turns of heavy wire connected in series with the load and arranged to produce a field counteracting the field of the holding coil, the objective being to release the armature and open the working contacts when the load reaches a predetermined maximum value; and a third embodiment comprising in addition motor braking means in the for

Abstract: Low voltage cable lighting system including a flat cable comprising two bare, ribbon shaped conductors which are plached on each side of and bonded to an insulating interlayer, and a multitude of low voltage bi-pin lamps which are distributed along the cable with each of their contact pins resting against the surface of one of the ribbon conductors, each lamp being secured in place by means of a mounting clamp which contains means for maintaining a stable contact pressure between the contact pins and the ribbon conductors.

Abstract: Foil strip conductor comprising a continuous tape of dielectric material placed adjacent to and facing an equally wide band of a conductive material like e.g. copper foil on one side, and another, wider, dielectric tape facing the conductor on its opposite side, the overlapping edges of the wider of the two tapes being folded around the edges of the conductor and the first mentioned dielectric tape at the same time, and in the process being bonded to the outside surface of the first mentioned tape.

Abstract: A ceiling canopy for a pendant light fixture comprising a cup shaped enclosure which serves to conceal the ceiling box and electrical connections and means of suspension of the fixture, with the additional feature of containing a low voltage power supply like e.g. a toroidal transformer surrounding the pendant suspension cord and having, on its external surface, means for mounting one or several individually adjustable lamp holders for low voltage reflector lamps which are powered from said power supply and may be directed towards individual objects in the room.

Abstract: A three phase transformer, e.g. a distribution transformer comprising three, substantially identical, frame shaped winding assemblies each containing primary and secondary windings which together form half legs having substantially semicircular cross section. The winding assemblies are placed together to form a triangular structure, so called temple configuration, wherein the half legs of adjacent winding assemblies combine into three legs having substantially circular cross section. A magnetic circuit is formed around each leg by winding a continuous strip of a ferromagnetic sheet material around the leg.

Abstract: Three phase transformer, e.g. distribution transformer, comprising three frame shaped winding assemblies, each containing primary and secondary windings, two of said assemblies being substantially identical and juxtaposed to form a center leg having substantially circular cross section, and a third winding assembly surrounding the two said assemblies, and forming, together with the outside half legs of said winding assemblies, two outside legs, each having substantially circular cross section, the three winding assemblies being interlinked by hollow, cylindrical cores wound from ferromagnetic strip material and surrounding each of the three legs.

Abstract: An apparatus and method for joining electrical wires utilizing TIG, (Tungsten Inert Gas) welding, comprising mechanically operated, electrically conductive jaws which gather the wires to be joined in a tight bundle with their ends located in close proximity from the tungsten electrode and gas nozzle of a TIG welding gun, a moveable plate covering the gas nozzle and electrode defining the proper distance between the wire ends and the tungsten electrode and arranged to move away to uncover the electrode after the jaws have closed, and an electrical switch which automatically initiates the welding cycle after the other actions have been completed.

Abstract: Two boxes are mounted in vertical alignment adjacent a cylindrical mandrel surface, one above the mandrel axis and one below. The lower box contains a light source with a rectilinear filament parallel to the mandrel axis. The upper box contains an array of photosensors equidistantly spaced in a horizontal plane in a direction toward and away from the mandrel axis. Each of the photosensors is part of a separate electronic circuit with transistors, resistors, and a light emitting diode. The light emitting diodes are arranged in a display to form a column that lights up from the bottom in accordance with the thickness of a pipe wall being formed and the position of the edge of its shadow on the array of photosensors. In an alternative embodiment, a white scale is disposed in the upper box at an angle from the direction of the light source and the position of the edge of the shadow of the pipe wall on the scale gives a visual indication of thickness of the pipe wall.

Abstract: The invention relates to a windmill of the type having an elongated propeller shaft inclining upwardly away from the wind direction so that the height of the propeller above ground is substantially determined by the length of the shaft and its angle with the horizontal plane. The invention is based on the recognition that the wind load on the propeller is substantially acting as a longitudinal tensile strain in the shaft when its angle with the horizontal plane is within a certain angle range, and according to the invention it is therefore sufficient to support the shaft by a simple staying device via a bearing. One end of the staying device may be attached solely to the non-rotating part of the bearing, resulting in the achievement of an inexpensive and light construction having a relatively thin shaft.

Abstract: A truck on rails includes a vertically adjustable horizontally extending main beam supported at one end and having a plurality of auxiliary beams semi-circularly arranged thereabout parallel thereto and each connected thereto by a plurality of parallel levers of equal length each having a fulcrum on the main beam, being pivotally connected adjacent an outer end to its respective auxiliary beam, and being operatively connected adjacent an inner end to an actuating rod reciprocable by a hydraulic actuator for adjustment of the auxiliary beams radially of the main beam. The auxiliary beams are provided with rollers for engagement with the inside of a pipe, and those on the uppermost auxiliary beam are driven by a compressed-air motor to compensate for frictional drag imposed by the others on pipe being rotated in continuous production on a pipe making machine. When the pipe is cut to length, the truck transports the cut-off length to a storage or shipping area and returns to support another length being made.

Abstract: The longitudinal support members for the endless helical band are circularly disposed about and adjustable radially of the mandrel axis. Each support member is mounted on a plurality of parallel arms of equal length spaced longitudinally of the mandrel axis. The outer end portions of the arms for each support member are pivotally connected thereto. At each of various locations along the mandrel axis, the inner end portions of the arms at that location for all of the support members are pivotally connected to a ring which is adjustable along the mandrel axis to effect radial adjustment of the support members, and a support ring, also adjustable along the mandrel axis, is provided to support the arms radially when the longitudinal support members are in an inner portion of their adjustment range.