Abstract: An arrangement for detecting winding shorts in a rotor winding of an electrical machine having a drive shaft with a drive end directly connected to ground and a measuring element provided at the non-drive end of the drive shaft for recording the shaft voltage between the machine shaft and ground. The voltage measuring element produces an output corresponding to the shaft voltage, which is applied to an analysis unit. The analysis unit evaluates the even or fractional harmonic content of the shaft voltage and outputs an alarm signal in the event that the even or fractional harmonic content exceeds a predetermined value.

Abstract: A sealing device for sealing a leak occurring inside a reactor pressure vessel at the vicinity of a weld between a control rod drive (CRD) tube and a surrounding CRD stub tube which communicates with an opening in the wall of the pressure vessel. An inner sealing sleeve of a soft metallic material and with an outer frusto-conical surface is fitted over the tube and the CRD stub tube, and an outer sealing sleeve of a hard metallic material and with an inner frusto-conical surface is fitted over the inner sealing sleeve. On each side of the crack special contact surfaces are formed between the inner sealing sleeve and the tube or the CRD stub tube. As the outer sealing sleeve is pressed in over the inner sealing sleeve, the inner sealing sleeve is pressed by the frusto-conical surfaces, moving against each other, against the tube and the CRD stub tube, thus providing sealing at the contact surfaces.

Abstract: In a UV high-power radiator, the electrodes (6', 6") consist of wires embedded in a glass dielectric (3). The dielectric is arranged spaced between two UV-transparent sheets (1, 2). The discharge spaces (8, 9) are filled with a filler gas emitting radiation under discharge conditions. The surface discharges (10) form on the dielectric surface in each case between two adjacent electrode wires (6', 6"). A high-power radiator constructed in this manner is characterized by simple and economical construction and high UV yield.

Abstract: A drive unit on the pedestal of an industrial robot includes a gear unit having a hollow output gear shaft driven by a drive motor, and the base of the industrial robot includes a bearing on which the pedestal is rotatably mounted and whose axis of rotation is essentially coincident with the axis of rotation of the output gear shaft, and a torsionally rigid but otherwise flexible shaft coupling connects the output gear shaft to the base.

Abstract: In a multiflow gas-dynamic pressure-wave machine, with a rotor, a housing surrounding the rotor as well as an air housing and a gas housing with ducts for the intake and discharge of the gaseous working medium, the cell ring of the rotor is subdivided by two intermediate pipes placed between a hub pipe and a shroud band into three concentric flows. The radially directed cell walls of the flows are mutually offset by one third of a cell division in the circumferential direction. The cells of the three flows in the circumferential direction have an uneven division.

Abstract: A robot wrist comprising a plurality of mutaully rotatable tubular parts arranged in series with each other and a tubular member (2), such as a tool attachment, the member (2) being rotatably mounted on one (1) of the parts and, via a tubular gear, being driven by a separate motor. The motor (10, 11) has a tubular rotor (11) which, along with the tubular gear (4, 5), is concentrically arranged with the tubular member (2) to form a channel for supply and/or communication caples or light beams. The robot wrist exhibits a great orientation capacity in space while having at the same time a relatively small diameter, which enables the insertion of the part (1) into confined spaces.

Abstract: A stack of high-temperature fuel cells which include a ceramic solid electrolyte, a porous oxygen electrode and a porous fuel electrode with gas-tight separation plates placed between the cells, wherein the separation plates, in their plane, exhibit knobs on both sides for electrical contact and include, on their edge, oxygen-side and fuel-side sealing edges whose planes are perpendicular to the plate plane.

Abstract: Oxide-dispersion-hardened superalloy based on nickel, which is composed of the following main constituents:______________________________________ Cr = 5-13.95 percent by weight or 14.05-22 percent by weight Al = 2.5-7 percent by weight Mo = 0-2 percent by weight W = 0-15 percent by weight Ta = 0-7 percent by weight Hf = 0-1 percent by weight Ti = 0-3 percent by weight Zr = 0.02-0.2 percent by weight Co = 0-10 percent by weight C = 0-0.2 percent by weight Y.sub.2 O.sub.3 = 1-2 percent by weight Ni = Remainder, ______________________________________and which additionally contains boron in a content of 0.026 to 0.3 percent by weight.A process for extending the temperature range of the secondary recrystallization of an oxide-dispersion-hardened nickel-base superalloy of the above composition during coarse-grain annealing and during the production of a monocrystal with a cross section of at least 5 cm.sup.2 by doping with a boron content of at least 0.011 percent by weight.

Abstract: In order to detect interlamination shorts (8 ) in the case of laminated core stacks, the core stack (1) is magnetized with an auxiliary winding. The iron surface (15) is scanned with a measuring coil arrangement (5) comprising two electrically separated, mechanically interlinked coils (6, 7). The output signals from the coils are compared with each other in a downstream measuring instrument (9); in the case of an interlamination short, the fault current through the short-circuited laminations will induce in the coils different, phase-shifted voltages which make it possible to infer the position and size of the interlamination shorts.

Abstract: A test bench for vehicles includes a testing zone for testing vehicles, and a preparation zone separate from the testing zone. The preparation zone includes a lifting platform, an air cushion transport system, and an air drive system for driving the air cushion transport system into the testing zone with the vehicle prepared for testing.

Abstract: In a milling cutter for milling work with a setting angle of preferably 90.degree., the face cutting edges (1a, 2a) and the peripheral cutting edges (1, 2) are orientated in opposite directions for the chip removal. The peripheral cutting edges (1, 2) operating in each case in the milling direction each take up half the width of the entire milling cutter, as a result of which the latter can be used as a reversible milling cutter.

Abstract: Process for shaping and improving the mechanical properties of blanks produced by powder metallurgy from an alloy with increased high-temperature strength by extrusion, and the deformation is successively performed in at least two temperature ranges different from one another or in two phases, in that the blank (2) is first reduced in its cross section at a temperature T.sub.1 and then is either agin reduced in at a lower temperature T.sub.2 or is deformed at a temperature T.sub.3 under counterpressure so that its cross section is further widened. T.sub.3 can be smaller than or equal to T.sub.1.

Abstract: An oxidation-resistant and corrosion-resistant high-temperature alloy for directional solidification on the basis of an intermetallic compound of the nickel aluminide type having the following composition:Al=10-16 atomic %Si=0.5-8 atomic %Ta=0.5-9 atomic %Hf=0.1-2 atomic %B=0.1-2 atomic %Ni=the remainderThe alloy has at least 90% by volume of the intermetallic phases Ni.sub.3 Al, Ni.sub.3 Si and Ni.sub.3 Ta.

Abstract: In a radial compressor the device for extending the performance at small throughputs by stabilizing the impeller flow in the inlet region comprises a recess (5) in the form of a groove which is oriented in the circumferential direction of the inlet duct (6) of the compressor, whereas in the flow direction it extends with a given axial width to the impeller (2). A stabilization ring (3) is integrated into said recess (5), being arranged in front of the impeller (2) and outside the principal flow (7) of the transported medium. A plurality of blades (4,4a), which are placed on the outer circumference of the stabilization ring (3), are in turn anchored to the inner contour of the recess (5).

Abstract: Electrical conductor in wire or cable form composed of a sheathed wire or of a multiple-filament conductor based on a ceramic high-temperature superconductor of the REBa.sub.2 Cu.sub.3 O.sub.6.5+y type, RE being=rare-earth metal, O<y<1, or of the (La,Ba,Sr).sub.2 CuO.sub.4 type, as core (1) and of a metal sheath (3) as mechanical support and emergency current conductor, the core (1), clad with metal sheath (3), of each filament of the electrical conductor composed of a multiplicity of filaments being embedded on all sides in a soft magnetic material (4) of high permeability.

Abstract: Melt fed to a continuous casting mold is slowed and spread by a magnetic field acting in the path of the inflowing melt stream. The magnetic field, which is either a static field powered by continuous current, a field powered by permanent magnets, or a field powered by low-frequency alternating current, is applied at at least two spaced-apart locations, either in two separated cast strands or at spaced locations across a wide single strand.

Abstract: A process for manufacturing a cylindrical body and a device for carrying out the process.With this process, in particular sample bodies of absorbents are obtained.The intention with this process is that the nature of the bodies taken is not falsified. A device, which allows this process to be carried out rationally, is to be specified. This is achieved by the fact that firstly a plane-parallel board (1) is cut out of the material, which board (1) is provided with a guide opening (4a). Inserted into the guide opening (4a) is a guide part (5) which guides a cutting element (9) concentrically to the said guide opening (4a), which cutting element (9) separates a sleeve-shaped body (13). This body (13) is then introduced into a measurement device.

Abstract: An apparatus for the removal of residues from the inner wall of a tube carrying hot gases and/or vapors includes a passage extending into a first end of the tube in an axial direction; an axially extending shaft supported within the passage in an axially displaceable manner so that one end of the shaft is within the tube; a discharge opening in the tube through which the residues may be removed; a helically wound metal scraper connected to the one end of the shaft; and a device for driving the shaft such that the scraper is rotated in a manner of a corkscrew into the tube.

Abstract: In an ozone generator with enamel dielectric, to increase the ozone yield, the latter is built up on at least two enamel layers, the layer (4) facing the discharge space (5) having a smaller dielectric constant (.ltoreq.6) than the layer (3) lying underneath.

Abstract: In an MOS-controlled bipolar power semiconductor component, a recombination layer (10), which is doped with the same polarity as the base layer but more highly, is inserted, starting with the structure of an IGBT, into the base layer between anode (A) and cathode (K), which recombination layer divides the base layer into an upper and lower base layer (7a and 7b, respectively). The resultant structure forms a series circuit of MOSFET (T) and PIN diode (D) which is free of latch-up and provides the possibility of higher blocking voltages.