Abstract: The switch element for triggering a cut off or control function is accommodated in a shaft (1), for example of a speed monitor. A spring-loaded release bolt (2) is surrounded coaxially by a compensating bush (4) which has a compensating ring (15), a spring plate (13) and a hub tube (14) and the center of gravity (S.sub.Kb) is such that, when the shaft (1) rotates, it compensates the centrifugal force, acting as an additional force to the spring prestressing force, of the spring half adjacent to the spring plate (13) and having the center of gravity (S.sub.F/2).

Abstract: In a method for monitoring and controlling an antenna selector in which a large number of switching points (U11, . . . Umn) are provided in matrix arrangement in order to connect m transmitters (S1, . . . , Sm) to n antennas (A1, . . . , An) in arbitrary manner, the switching state of the individual switching points is monitored and controlled by the switching points (U11, . . . , Umn) being sequentially selected by selection of the associated rows and columns.Compared with the prior art in which separate signal lines were provided for each breaker at each switching point, this results in a distinct simplification in the wiring of the system.

Abstract: A system for the automatic identification of the type of measuring head (1) of a fiber optic measurement value acquisition and transmission device which exhibits a measurement signal fiber (3) and a control signal fiber (4), in which the measuring head (1) can be remotely operated from a control unit (2) by means of control signals which are transmitted via the control signal fiber and, in particular, can be caused to emit a calibration signal. According to the invention, calibration signals of different frequencies are provided for various types of measuring heads. Using the frequency of the calibration signal, the control device is capable of identifying in each case the measuring head connected to it.

Abstract: Measurement value signals (S1), for example from a signal transmitter which is located at high-voltage potential, which are transmitted by a signal transmitter (1) with a transmit diode (6) on the high voltage side via an optical waveguide (8) to a signal receiver (9) with a photodiode (10) at ground potential, are subject to an optical signal attenuation along the way. To ensure automatic attenuation compensation both for alternating and for direct voltage measurement signals (S1), a reference direct current (I.sub.REF) is fed back to the transmit diode (6). The transmission system is calibrated before each measurement. During this process, the input of an amplifier (4) of the signal transmitter (1) is connected to reference potential (U0) via a switch (3) and the gain factor of the signal receiver (9) is controlled in such a manner that its output signal (S9) is equal to a predeterminable reference voltage (U.sub.REF).

Abstract: In this pressure wave supercharger, the driving belt pulley (19) for the rotor having a freewheel clutch (23) and rolling contact bearings (22) provided on both sides of the same are supported on the rotor shaft (18+20). With respect to the operation of the pressure wave supercharger, this provides the advantages of drive by the engine with constant engine/rotor transmission ratio and of a free-running rotor driven by the gas forces alone.

Abstract: A method for producing large-area power semiconductor components, wherein at least two irradiation processes (neutron irridiation, ion implantation electron, .gamma.or proton irradiation) are used to produce the basic doping, to introduce deep pn junctions and to introduce recombination centers. It is precisely for the critical process steps (p-base, n-type stop layer) that the improved homogeneity of the layers signifies a higher yield and improved limit data for the finished components.

Abstract: In the combustion space of a combustion chamber of a gas turbine operated with liquid fuel, at least one after-burner (4) is employed in each case in combination with one or more primary burners (2, 2a). The after-burner (4) and at least its fuel spray cone (15), which acts directly into the central combustion chamber (6), are screened by an unswirled enveloping airstream (14) against the hot gases (13) from the combustion in the primary burners (2, 2a). The after-burner (4) itself is not automatically operating, i.e. the ignition of its mixture (14/15) takes place further downstream, preferably at the beginning of the mixing chamber (7), as a result of which a turbulence-free flow with uniform pressure and temperature profile is provided for acting on the turbine (9).

Abstract: A measuring apparatus for space-resolved temperature measurement by optical backscattering measurement at optical waveguides, wherein an improvement in the signal-to-noise ratio is achieved by including an additional filter device to attenuate the Rayleigh peak in the backscattered light. The filter device preferably includes a polarizing beam splitter, behind which a quarter-wave plate and an interference filter are disposed in the transmission direction.

Abstract: In an axial flow gas turbine with reaction blading, whose outlet rotor blades (14) are followed by a diffuser with axial outlet into an exhaust gas pipe (13), the kink angles of the diffuser inlet both at the hub (10) and at the cylinder (9) are fixed exclusively for the purpose of evening out the energy profile over the duct height at the outlet from the last rotor blade row in order to shorten the diffuser system and to optimise it in part load operation. In addition, a mechanism provided to remove swirl from the swirling flow in the form of profile ribs (17). Where the outlet rotor blades have a high Mach number flow, which leads to a large opening angle of the blading, the diffuser is subdivided into several partial diffusers (16) via sheet metal guides (15).

Abstract: In a high-voltage-conducting assembly (10), such as, for example, the current transducer arrangement for a high-voltage outdoor installation, measurement information items are transmitted via optical waveguides from high-voltage potential to ground potential. To reduce the voltage gradient along the optical waveguide, the latter is spirally conducted along an optical waveguide carrier (7) between the high-voltage side (9) and the ground potential side (5) of a high-voltage insulator (6). The optical waveguide support (7) can be a self-supporting plastic coil (7) or the outer layer of the insulator tube of fibre-glass-reinforced plastic of the high-voltage insulator (6) or its silicon layer applied on the outside or its silicon shield tape. In this arrangement, the surface leakage path of the optical waveguide support is greater than 1.5-times, preferably greater than 5-times the height (h) of the high-voltage insulator (6).

Abstract: A static converter circuit has a voltage summing transformer (Tr-Tr13) with several part transformers (Tr1-Tr13) the static-converter-side winding of which are connected via one four-quadrant actuator each to a direct-voltage link circuit. The four-quadrant actuators are single-phase bridge circuits with one GTO thyristor each and a diode, which is antiparallel thereto, per bridge branch. The static-converter-side windings of the part transformers can be short circuited in each case by means of an alternating-current circuit breaker with antiparallel-connected thyristors. Each part transformer has a separate core. The power-system-side windings of the power transformers are connected in series and are connected at their ends to a railroad power system with 162/3-Hz. The direct-voltage link circuit is connected via power-system-commutated static converters and a static converter transformer to a national power system with 50 Hz.

Abstract: A PSK data transmission method wherein in the presence of disturbances which are harmonics of a common fundamental frequency, the disturbance signals are eliminated by the fact that the symbol duration (T) of the data symbols, to be transmitted, of a baseband signal (B(t)) is selected in such a manner that the period duration of the disturbance signal (S(t)) is an integral multiple N.T of the symbol duration. By forming the difference between symbols separated by N intervals from each other at the receiver side, the disturbance signal (S(t)) is completely suppressed while the data rate can be arbitrarily determined via the choice of N.

Abstract: Superalloy with oxide dispersion hardening having improved corrosion and oxidation resistance and based on nickel with the following composition:Cr=17-18% by weight,Al=6-7% by weight,Mo=2-2.5% by weight,W=3-3.5% by weight,Ta=2-2.5% by weight,Zr<0.2% by weight,B<0.02% by weight,C<0.1% by weight,Y.sub.2 O.sub.3 =1-1.5% by weight,Ni=Remainder.

Abstract: In an internal combustion engine supercharged by a pressure-wave supercharger (2), a lambda probe (7) is used for measurement of the oxygen content in the circuit. The oxygen content determined by the lambda probe (7) creates a measuring signal (9), which is used for controlling the throttle valve (4) and/or the starting valve (6). This control is aimed at reducing the NO.sub.x emissions from the combustion and possibly ensuring the regeneration of an exhaust gas particle filter (3) integrated in the circuit. In this arrangement, the lambda probe (7) is to be placed in the low-pressure exhaust gas line (444), which has a positive effect on the response capability and the accuracy of the measured data of the probe (7). This obviates the need for additional aids for the correction of pressure fluctuations such as occur at other points in the circuit of the internal combustion engine.

Abstract: To install a high voltage device, particularly a high voltage breaker having two interrupting chambers and a high voltage insulator in a simple earthquake resistant manner, an end flange of the high voltage insulator on the ground potential side is rotatably suspended from the support beam of a steel frame. A vibration damper is preferably provided between the high voltage breaker and its suspension device. The vibration damper is attached to a ball received in a socket which is mounted on the support beam. The two interrupting chambers which are connected to one another in a V-shape, are connected to high voltage lines. This inverted suspension is also suitable for current and voltage transformers and overvoltage arresters.

Abstract: Process for increasing the room-temperature ductility of a workpiece composed of oxide-dispersion-hardened nickel-base superalloy and existing as coarse, longitudinally oriented columnar crystallites by subjecting the previously zone-annealed workpiece to a solution anneal in the temperature range between 1,160.degree. and 1,280.degree. C. under argon atmosphere for 1/2 h to 5 h and then to a purposefully chosen cooling down at a rate of 0.1.degree. C./min to 5.degree. C./min to a temperature of 500.degree. to 700.degree. C. Thereafter the workpiece is cooled down to room temperature in air. Preferred purposefully chosen cooling down rate: approx. 0.5.degree. C./min.

Abstract: In a method of producing a beveled peripheral profile on a semiconductor disk (1), the peripheral profile is ground by an obliquely-arranged grinding disk (7). The centering of the semiconductor disk (1) in the clamping device, consisting of clamping heads (3, 6), preferably occurs via a bonded-on molybdenum disk (2), which runs on a guide disk (9). The employment of a diamond grinding disk with suitable grains and binder is particularly appropriate.

Abstract: To improve the heat protection of an electronic device (7) in the case of heat radiation coming from the outside, for example solar rays, lateral radiation reflectors (12, 13; 16, 17) of 1 mm-thick aluminium plate polished on both sides and degreased are arranged between the electronic device and the walk (20, 21) of a heat protection casing (1) which laterally surrounds the electronic device. In addition, upper radiation reflectors (14, 15) are provided between the coverplate of the electronic device (7) and a coverplate (4) of the heat protection casing (1), a ventilation opening (18) remaining to the lateral radiation reflectors. In the sidewall of the heat protection casing (1), lower and upper ventilation slots (5,6) are arranged by means of which a chimney effect is achieved in the interior of the heat protection casing. In addition, a bottom plate (2) of the heat protection casing (1) can exhibit cooling openings (3).

Abstract: In a method of making an encircling groove (8) on the edge of a semiconductor slice (5) of a power semiconductor component, first of all the edge is surface-ground and then the groove (8) is ground in one operation by means of a form-grinding wheel (3) correspondingly contoured on the edge. An especially high output is achieved with diamond grinding wheels of appropriate grain size and suitable bond.

Abstract: To increase the availability of current transducers for outdoor high-voltage installations, an electronic signal processing device for the measurement signal of the current transducer is arranged above the current transducer as a block which can be removed from above within a transducer head casing which is painted on the outside. The electronic signal processing device is attached to a coverplate, which is aligned parallel to a primary conductor of a magnetic shield casing, which is surrounded by an electrical shield casing. The signal processing device consists of low-power electronics below and power electronics above the coverplate; it converts analog signals of the current transducer into digitized and encoded signals for serial transmission by means of a fibre-optical line. The power electronics are in good thermally conducting contract with the coverplate of the electrical shield casing via a metal plate. Lower and upper ventilation slots are provided at the transducer head casing.