Abstract: A gaseous mixture ultracentrifuge has a hollow cylindrical rotor having its ends closed by end covers through which inlet and outlet holes are formed, the rotor being internally free from non-rotative parts, while non-rotative means on the outsides of the end covers provide via the holes, for feeding the gaseous mixture into the rotor through one of the end pieces, and for removing separated components of the mixture through the outlet holes of the end covers.

Abstract: An asynchronous machine with a rated power of at least 1 MVA has a laminated stator core which supports a multiphase AC winding and a rotor surrounded by the stator core and having a length substantially greater than the length of the laminated stator core. The rotor has winding slots running axially along its whole length, each of the slots having wall portions facing each other and converging radially outward in connection with a central plane. Winding bars are arranged in the winding slots and are included in a squirrel-cage winding and fit the slot walls. An annular winding portion at each end of the rotor short-circuits the rotor bars, such winding portion lying axially within the end surface of the rotor core and outside the end surface of the stator core. The bars may be U-shaped in cross-section, with one flange of each adjacent pairs of bars located in the same winding slot. The end portions of the rotor core have annular grooves therearound.

Abstract: A turbo-generator with a rotor winding includes a plurality of slots in which the rotor windings are inserted and a plurality of slot wedges, at least two slot wedges lying in each slot on the outside of the winding and being electrically connected with each other. A plurality of relatively thin pressure tubes of a deformable material such as copper are positioned in the slots between the wedges and the windings. Thereafter, the pressure tubes are supplied with a thermosetting resin through feed tubes, the resin being supplied at a sufficient pressure and in a sufficient amount to produce an expansion of the space within the tube by at least 50 per cent. The feed tube is then subjected to heat in a localized area, thus accelerating the curing of the resin in this area of the tube and forming a plug, after which the supply of pressure to the pressure tube is disconnected. After the resin in the pressure tube has hardened, the feed tube is removed.

Abstract: A turbo-generator with a rotor winding includes a plurality of slots in which the rotor windings are inserted and a plurality of slot wedges, at least two slot wedges lying in each slot on the outside of the winding and being electrically connected with each other. A plurality of relatively thin pressure tubes of a deformable material such as copper are positioned in the slots between the wedges and the windings. Thereafter, the pressure tubes are supplied with a thermosetting resin through feed tubes, the resin being supplied at a sufficient pressure and in a sufficient amount to produce an expansion of the space within the tube by at least 50 per cent. The feed tube is then subjected to heat in a localized area, thus accelerating the curing of the resin in this area of the tube and forming a plug, after which the supply of pressure to the pressure tube is disconnected. After the resin in the pressure tube has hardened, the feed tube is removed.