Abstract: A superconducting fiber bundle includes carrier material formed by fibers of carbon, silicon carbide, steel, boron or glass. The fibers have a superconducting coating formed of a superconducting, non-metallic, inorganic material. The coating of the fibers is carried out from the liquid phase or the gas phase.

Abstract: The present invention is a drive system for a boat propeller, with a motor and a reverse gearbox. For forward travel a hydrodynamic coupling is provided and for reverse travel a hydrodynamic reverse converter is provided. The coupling is operated with its maximum filling degree in the upper range of the propeller speed, but in the lower range of propeller speed with a partial filling. Thus, the hydrodynamic coupling is the single hydrodynamic power transfer unit for the entire forward speed range. In order for the boat to be able to be quickly braked down from full speed, the reverse converter is arranged to provide a high torque conversion in the reactive braking range.

Abstract: Components made from steel can be nitrocarburized in cyanate- and cyanide-containing salt baths within relatively short times if the process is carried out at 600.degree. to 700.degree. C. in a first stage and at 560.degree. to 590.degree. C. in a second stage. The components exhibit the same or better characteristics as compared to considerably longer processing at 560.degree. to 590.degree. C.

Abstract: In a power-transmission unit for variable-speed drive of machinery with hydro-dynamic speed-superposition of a differential gear a second torque converter is provided as a braking device. This increases the effectiveness of the unit by feedback of the superposed output onto the drive side. Particularly advantageous is the use of an oppposed-motion converter as brake converter for certain operating conditions or the combination of a with-motion converter and an opposed-motion converter in the unit. Furthermore, this makes an extension of the speed control range possible.

Abstract: A hydrodynamic brake has a rotor blade wheel and a stator blade wheel with oblique blades and which together form a toroidal work chamber. A series of quick blades are mounted on the stator blade wheel for controlling the flow of braking fluid between the blade wheels and thereby the degree of braking action. Each of said blades is mounted for rotation around a radial axis and can be swung uniformly by means of a common actuating device. In this basic position, the guide blades are parallel to the stationary blades to provide the maximum flow of braking fluid. In a "zero position" the blades are all in a plane normal to the axis of rotation of the brake, whereby they substantially block the flow of braking fluid within the work chamber. In order to control the braking action, the guide blades may be brought into any desired intermediate position.

Abstract: A high temperature protective coating formed by an alloy on the basis of nickel, cobalt, chromium, aluminum and also frequently of yttrium. There is improved adherence of the metallic oxide covering layer which forms on the protective coating and increased the oxidation and corrosion resistance. Silicon may be admixed to the alloy as a first addition. The amount of the silicon to be admixed to the alloy lies between 1 and 3% by weight. The oxidation and corrosion resistance can be increased by means of a further addition of zirconium in an amount of 1% by weight. The same results can be obtained by a further addition of tantalum, also in the amount of 1% by weight.

Abstract: A method for producing full-surface or partial metal films on a substrate includes placing a coating on a substrate. The coating is irradiated sheetwise with a laser to form the metal films.

Abstract: Insulating device for high and low temperatures with at least one insulating material, characterized by the feature that the insulating material is formed at least in part of total reflecting fibers.

Abstract: A power transmission system serves to drive a variable-speed processing machine normally in a lower speed range and if necessary in an upper speed range. The system essentially comprises the following elements which are all disposed coaxially to one another: An input shaft connected by means of a hydrodynamic adjustable coupling to an intermediate shaft to rotate the impeller pump of an adjustable hydrodynamic torque converter. Its turbine wheel rotates with a brakable override shaft. The intermediate shaft and the override shaft are connected to an output shaft by means of a differential gear.

Abstract: Production of superconducting fiber bundles where in a CVD reactor niobium carbonitride of the general formula NbC.sub.x N.sub.y is deposited on support fibers by means of chemical deposition from the vapor phase by reaction of niobium chloride, carbon and nitrogen compounds, and in addition to the mentioned reaction gases at least one oxygen-containing gas is introduced into the CVD reactor in a controlled manner.

Abstract: A fluid circuit for a hydrodynamic coupling comprises a circuit line which is connected to the outlet of the coupling and which extends via a cooler and via a flow control element back to the inlet of the coupling. An overflow valve serving for limiting pressure and the delivery line of a filling pump are connected to the circuit line in front of the flow control element in the flow direction. Arranged in the delivery line are a fixed-setting throttle element, for example a diaphragm, and, parallel to this, a high-speed filling valve which opens automatically when the pressure prevailing in the circuit line in front of the flow control element falls below a specific limiting value.

Abstract: In directly bonding a metal to ceramics, in accordance with the invention, that surface of a metal component which is to be bonded by heating to a ceramic substrate is provided with parallel-running grooves before the preoxidation. The grooves make it possible to optimize the quantity of oxygen available at the bonding location and provide good flow behavior of the melt. As a result, a bond with good adhesion is obtained. Moreover, there is no formation of a thicker oxide layer on the free smooth surface of the metal component.

Abstract: A superconducting fiber of a superconducting fiber bundle, in which a base layer of a carbide or oxide is applied to the outer surface of a carrier fiber and subsequently a superconducting layer is deposited on the base layer to which the superconducting layer adheres.

Abstract: High-temperature protection layer of an alloy with a base of aluminum, chromium and nickel, particularly for structural gas-turbine elements of an austenitic material. The base material of the alloy contains at least 8 to 12 atom % aluminum and 28 to 28 atom % chromium with the remainder nickel, and at least silicon and titanium are admixed to the base material as additives such that at a temperature below 900.degree. C., a passive cover layer of chromium oxide, and at a temperature above 900.degree. C., a passive cover layer of aluminum oxide is developed on the applied alloy.

Abstract: Method for directly bonding copper foils having a copper oxide layer to oxide-ceramic substrates by heating the ceramic substrate covered with the copper foil in an oxygen-containing atmosphere to a temperature above the eutectic temperature of Cu and Cu.sub.2 O, but below the melting temperature of copper in a vacuum furnace at a pressure of not more than 1 mbar while maintaining a furnace atmosphere with a partial oxygen pressure between 0.001 and 0.1 mbar.

Abstract: Method for the direct joining of metal pieces which have a surface metal oxide layer, to oxide ceramic substrates by heating the ceramic substrates covered with the metal pieces in an oxygen-containing atmosphere to a temperature above the eutectic temperature of the metal and the metal oxide, but below the melting temperature of the metal. The heating is carried out in a continuous heating furnace in a nitrogen atmosphere with an addition of oxygen of 20 to 50 vpm. The cooling-down in the continuous heating furnace takes place after the solidification of the eutectic melt, in a nitrogen atmosphere which has an oxygen content well below the 20 vpm.

Abstract: The disclosure concerns a venting device for the housing of a rotary machine. The housing has a venting duct leading from the interior of the housing outwardly through a liquid-mist or oil-mist separator. A peeling device is arranged closely adjacent to the peripheral surface of a rotating member of the rotary machine. The peeling device intercepts the boundary layer of mist laden air that is rotating with the peripheral surface and directs the air boundary layer into the venting duct which in turn extends to a liquid or oil-mist separator or filter. The peeling device thus transforms the kinetic energy of the oil laden atmosphere at the peripheral surface of the rotating member into pressure which will drive the oil-mist laden atmosphere through a filter.

Abstract: Waste waters from salt bath hardening and galvanizing operations are removed through evaporation of the injurious material containing waste water and complete detoxification of the concentrate from the evaporation. The waste waters are first brought to a salt content of 300-500 grams/liter and this concentrated solution is then supplied to a molten salt bath.