Abstract: In a combustion installation, a mixture of fresh air (D) and exhaust gas (C) is fed to the burner (A) via a mixing/conveying device (EFG). There is provided in the combustion installation a heat exchanger (M), which undertakes the thermal conditioning of the mixture (H) before the latter is fed into the burner (A).

Abstract: A drive system with slip control for railway vehicles with two or more dc drive motors and with common control of the motor armature currents and a logic unit to which are input a measured signal which indicates the armature current intensity of the motor driving the axle having the best adhesion which is usually the trailing axle motor. The measured signal and an amplification signal are multiplied by each other and the product signal issued in a feedback loadsharing system to control the other motors such that the torque of the other motors increased to a maximum allowed level, the trailing axle then rolling very close to ground speed without slipping. This speed is used as a measure of the true speed, which in turn controls the system for loadsharing such that the vehicle can be controlled to maximum tractive effort without causing slipping axles.

Abstract: When dimensioning electrical plants for high voltages for regions exposed to earthquakes, it is necessary to design the current paths between the different apparatuses in such a way that the apparatuses in case of great oscillations are not subjected to abnormally great forces at the points of connection. The problem arises particularly in connection with convertor plants for high-voltage direct current designed with suspended valves, since the oscillating amplitudes there may become considerable. The invention relates to a current path intended for such plants, which is flexible its longitudinal direction and comprises at least two parallel, non-insulated straight conductors which are each connected to a respective end of the current path and electrically interconnectd via roller contact elements, the contact force of which is individually resilient.

Abstract: This pressure exchanger has an at least single-series cellular wheel arranged on a central axis and equipped with cells. These cells interact in a specific time sequence on the one hand with a hot-gas guide housing and on the other hand with an air guide housing. A pressure enchanger having an increased flushing energy is to be provided. This is achieved in that the cells each have a longitudinal axis which intersects the central axis at an angle. Moreover, the faces of the hot-gas guide housing and air guide housing confronting the cellular wheel extend parallel to the corresponding faces of the cellular wheel.

Abstract: A converter station for power transmission by means of high voltage direct current has an electrode line protective device for detection of ground faults on the electrode line of the station. An alternating voltage generator injects an alternating signal with a predetermined frequency on the electrode line. The two ends of the electrode line are provided with suppression filters tuned to the measuring frequency. The suppression filter arranged at the remote end of the electrode line is matched, by means of a resistor to the wave impedance of the electrode line. An impedance measuring device senses the impedance of the electrode line at the feeding point in relation to the ground at the measuring frequency. An indicating signal is delivered from the measuring device if the impedance measured deviates from the impedance of the electrode line when in a faultless state.

Abstract: A balancing loop including a housing inside of which is disposed a first conductor part having a first sublength and a second sublength, with the first sublength constructed as a coaxial line passing through the housing and having its inner conductor terminated inside the housing and connected to a second conductor part, and the second sublength extending from the termination of the inner conductor to the second conductor part to an output line. The second conductor part also has the first and second sublengths and extends spaced apart from and parallel to the first conductor part. The second conductor part has one side connected to the housing and the other side to another output line. The output lines connected to the first and second conductor parts thereby form two symmetrical output lines which lead out of the housing. At least one variable capacitor is arranged between the first and second conductor parts to tune the balancing loop over the operating frequency range.

Abstract: In a gas/steam power station plant, which consists essentially of at least one fossil-fired internal combustion engine (2), at least one steam circuit (1) and at least one heat exchanger (3), the heat exchanger (3) connected downstream of the internal combustion engine (2) is fed with exhaust gases (27) from the internal combustion engine (2). Together with a number of steam turbines (12, 13), the steam circuit 1 has a generator (14), a series of other auxiliary units (15, 16) and a water-cooled reactor (11) which produces an amount of saturated steam (B) from an amount of preheated feed water (C) treated in the heat exchanger (3) and fed to it. This amount of saturated steam is thereupon fed to a superheat stage (A) in the heat exchanger (3), where the actual final treatment of the steam takes place.

Abstract: In a MOS-controlled thyristor MCT, the second base layer (16) is pulled to the cathode-side surface of the semiconductor substrate (1) between the MCT until cells. At this point, a collector zone (20), which is doped oppositely to the second base layer (16) is arranged which is connected to the cathode contact (2) and reaches into the second base layer (16). Together with the second base layer (16) and an additional opposite anode short circuit, the collector zone (20) forms an inverse diode structure (11) which saves an external free-wheeling diode when inductive loads are switched.

Abstract: An axial flow turbine, whose outlet rotor blades (12) are followed by a diffuser (13), has first means (8) within the retardation zone of the diffuser for swirl removal from the swirling flow.A row with adjustable guide vanes (11) is arranged between these first means for swirl removal in the form of aerodynamic ribs and the outlet rotor blades. These guide vanes (11) have a straight mean camber line with a symmetrical aerofoil section, are conically shaped in the radial direction and are twisted.In addition to a substantial improvement in the pressure recovery over a wide load range, this measure also permits the vortex usually occurring between the rotor blades and the aerodynamic ribs to be prevented.

Abstract: This burner arrangement has a main feed channel (2) for a fuel-air mixture, which channel discharges into a combustion chamber (1). A swirler, which is provided with swirl vanes (5), is penetrated by a burner lance (3), and into which exit openings for the fuel feed discharge, is provided in this main feed channel (2). The aim is to create a burner arrangement in which it is impossible for undesired instances of ignition of the fuel-air mixture to occur outside the combustion chamber (1). This is achieved in that the exit openings are constructed as nozzles (9) which discharge into a region between the swirl vanes (5). In this regard, at least one nozzle is provided between two neighboring swirl vanes (5).

Abstract: In high-temperature batteries which contain a series circuit of galvanic cells with a solid electrolyte, the solid electrolyte can be damaged without the damage being noticed when the battery is short circuited in the cold condition and a voltage reversal occurs at individual cells. According to the invention, a protection device is formed of elements that are connected in parallel with the cells. The elements have a high resistance at the operating temperature of the battery and a low resistance in the cold condition. The elements form a voltage divider in the case of a short circuit caused at external terminals of a cold battery. The voltage divider ensures the desired voltage division.

Abstract: In an insulating system for high-voltage machines, a three-layer insulating tape is proposed as turn-to-turn insulation which comprises a center mica layer (1) which is covered on both sides by plastic foils (2,3) having different thickness. Thermoplastic adhesive layers (4,5) on the outer surfaces of the foils (2,3) produce an intimate bonding of the turn-to-turn insulation to the conductor elements and to the main insulation. An insulation of such construction is distinguished by a high electrical life at increased temperature and a high surge withstand capability.

Abstract: A drive for a steam servo valve (2), including a control valve arrangement for regulating the actuating pressure of a servo drive (1), whereby the drive can always be actuated reliably and quickly even with comparatively high oil pressure. This is achieved by the control valve arrangement having at least two regulatable control valves (17, 21) which are pressure-actuated via at least one pilot regulating valve (proportional pressure valve 29, 34).

Abstract: Process and apparatus for removing nitrates during the treatment of process water, based on an electrodialysis process where, through the use of suitable membranes (3, 4), a preferential migration of nitrate ions NO.sub.3.sup.-, and thus selective removal of toxic nitrates, is achieved. Anion exchange membrane (3) having a selectivity for chloride transport over sulfate transport of >1. Cation exchange membrane (4) having a selectivity for Na.sup.+ transport over Ca.sup.2+ transport of >1. The membranes (3, 4) are plastic membranes having a surface treatment.

Abstract: A catalyst for the elimination of toxic substances in exhaust gases from combustion systems and internal combustion engines, having at least one layer of catalyst material, includes a catalyst material formed by at least one mixed oxide system, which has unsaturated ions on its surface that effect charge transfer processes. A method for manufacturing such a catalyst includes grinding dry carbonates or oxides of lanthanum, manganese, iron, copper and strontium in a defined ratio by weight for at least one hour, and sintering the powder mixture thus formed at 1300.degree. C. for forming the perovskite structure or the perovskite and spinel structure.

Abstract: An asbolute position-measuring transducer system for an industrial robot having a plurality of axes of movement comprises an individual position transducer in the form of a resolver for each one of the axes, with the operating range of each axis corresponding to a plurality of revolutions of its resolver, a revolution counter connected to the output of the resolver of at least one of the axes for receiving the output signals from the resolver and counting the accumulated number of resolver revolutions, a back-up battery adapted for supplying the resolver and the revolution counter during the power failure, and a device for effecting the intermittent operation and reading-off of the resolver during the battery back-up operation, whereby a single resolver is used for position measuring during the normal operation and for counting revolutions during the battery back-up operation.

Abstract: In a premixed type of combustion of a liquid fuel at high pressure, the injection of the fuel (4c, 4d) and its evaporation with a gaseous medium (5) is undertaken, in order to prevent premature ignition of the liquid/gaseous mixture in the burner itself, at a location where the droplets of the fuel from the fuel nozzles (4a, 4b) are screened from the flame radiation from the flame front of the burner. As soon as the fuel (4c, 4d) is pre-evaporated, i.e. leaves the duct (7a, 7b) via the inlet slot (1d, 2d) in the direction of the internal space (3) of the burner as a mixture (6), it absorbs practically no flame radiation.

Abstract: In order with a low degree of equipment complexity to convert two alternating-currents of 16 2/3 Hz of two separate single-phase generators (G1, G2) of approximately the same power into a three-phase current with 50 Hz, the single-phase generators are connected via a SCOTT transformer (Tr1) to a rectifier (SR1) of a converter with a direct-voltage intermediate circuit (3-6). The direct current transmitted through the direct-voltage intermediate circuit is transformed into three-phase current by two inverters (SR2, SR3) connected in series, and supplied to a national power system (10) via power transformers (Tr2, Tr3). The two single-phase generators (G1, G2) are controlled by one generator voltage controller (42) in each case, which affects the excitation of the single-phase generators (G1, G2) via a field rectifier (43), at the same amplitude of their generator voltages (u1, u2). Moreover, the single-phase generators (G1, G2) are controlled at a phase shift of their generator voltages (u1, u2 ) of 90.degree.

Abstract: A method for preventing magneto-elastic torque transducers (1,2) from being influenced by a static, axially-extending magnetic field (9) comprises dividing the driving shaft between the driving source and the load in such a way that the shaft (3) between the driving source and the transducer shaft and the shaft (4) between the transducer shaft and the load, respectively, are provided with a shaft part (7,8) of non-magnetic material and that the transducer and the transducer shaft including the non-magnetic shaft parts are surrounded by an external magnetic shield (5) provided with flanges such that a very small air gap is present between the shield and the non-magnetic shaft parts.

Abstract: In an annular combustion chamber (A), a row of premixed burners (B, C) are located in the peripheral direction at the inlet end. The large premixed burners (B), which are the main burners of the annular combustion chamber (A), and the small premixed burners (C), which are the pilot burners of the annular combustion chamber, are located alternately relative to one another and at a uniform distance apart. Both the main burners (B) and the pilot burners (C) enter into a single annular front wall (10).