Abstract: An X-ray optical system with two X-ray mirrors (A,B) for imaging an X-ray source (S) on a target region is characterized in that the X-ray mirrors (A,B) are mutually tilted by an angle other than 90° such that the combined region of acceptance of the X-ray mirror (A,B) is adjusted to the shape of the X-ray source (S) and/or the target region. This increases the intensity of the focused X-ray radiation on the sample for a given emission of the X-ray source (S) power using a few, technically simple modifications.

Abstract: In a method for monitoring the functioning of a compressor, which charges a gas-filled accumulator chamber with a working pressure, the actual pressure prevailing in the accumulator chamber is measured and compared to a setpoint pressure. In response to a deviation in the actual pressure from the setpoint pressure, an error signal is produced. The comparison of the actual pressure and the setpoint pressure is carried out during the charging operation when the accumulator chamber is charged.

Abstract: It is proposed that a pneumatic suspension leveling system for vehicles with pneumatic suspension leveling elements assigned to the vehicle axles and/or vehicle wheels, with a compressor and a central pressure accumulator fed by it for the compressed air supply of the pneumatic suspension leveling elements, with an accumulator pressure sensor which detects the air pressure in the central pressure accumulator and generates a signal value correlating thereto, and with an electronic control device which processes the signal values of the central pressure accumulator and induces a pressure charging of the central pressure accumulator by the compressor, when the signal value of the accumulator pressure sensor reaches a predetermined lower threshold signal value and terminates this pressure charging when the signal value of the accumulator pressure sensor reaches a preset upper threshold signal value be improved with respect to its functional capacity.

Abstract: It is proposed that a pneumatic suspension leveling system for vehicles with a compressor which can be turned on and off by a control device in function of demand, which compressor only needs to operate intermittently, with predetermined on-time duration, during normal operation, be improved with respect to its functional capacity. This problem is solved in accordance with the invention in that the control device of the pneumatic suspension leveling system varies the on-time duration of the compressor in function of the heat transfer conditions which prevail between the compressor and the air enveloping the latter.

Abstract: An HF module, for example a tuner, is provided with a housing (10) and a printed circuit board (11) which is arranged in the housing and supports electrical components (12). To simplify the housing and to optimize the space utilization on the printed circuit board,the housing (10) is trough-shaped and closed with a lid (17),the printed circuit board (11) is fastened in the trough-shaped housing (10), andan electrically conductive insert (15) is provided which has contact tags (16) in locations corresponding to the ground connection points (14) of the printed circuit board (11) and which is connected to the ground connection points (14) of the printed circuit board (11) by means of these contact tags (16).

Abstract: To achieve a high passband attenuation, a switchable bandpass filter for a multiband tuner, includes at least a capacitance diode for frequency-tuning of at least a resonant circuit of the bandpass filter, and a switching diode arranged at the input and the output, this switching diode being switchable to either the blocked state or to the conducting state by DC voltages. The capacitance diode is additionally usable for blocking the bandpass filters and is integrated in the resonant circuit of the bandpass filter in such a way that, in dependence upon a switching potential, the capacitance diode couples the resonant.

Abstract: A foil blowing head for a thermoplastic synthetic resin tube has a primary air guide juxtaposed with the blowing head portion defining the internal primary air outlet, also formed with passages for the secondary air and is axially shiftable on the discharge tube from which air is led from the foil balloon.

Abstract: A printed circuit board includes an oscillator and a modulator. The oscillator includes a first printed inductor and a capacitive diode which are printed on one side of the printed circuit board. The modulator includes a second printed inductor coupled to the first printed inductor and printed on the same side of the printed circuit board as the oscillator. A conductive surface at a reference potential is arranged the other side of the printed circuit board and in the vicinity of the oscillator and the modulator and electrically coupled to the oscillator and the modulator using conductive through holes.

Abstract: A gas washing device includes a permeable gas sink, a gas inlet for supplying gas through the sink to a molten metal container, a gas flow meter positioned upstream of the gas inlet, and a further gas sink having a gas permeability greater than that of the first-mentioned gas sink and positioned between the gas inlet and the first-mentioned gas sink.

Abstract: A circuit is provided for the measurement and recognition of maximum or minimum voltages coming for example from a frequency selective measurement objective and in particular from an electronic filter. A fixed measurement frequency is fed to the measurement object. The measurement object is balanced by a stepwise change of a tuning voltage. The output voltage generated by the measurement object is fed to a switch after rectification and amplification, which switch is clocked with a clock signal. The output voltages of the switch are fed to an intermediate storage. The output voltages of the intermediate storage are supplied to a differential amplifier via an intermediate switch actuated by a control clock cycle. If the output voltage reaches an extremum such as a maximum then the stepwise change of the tuning voltage is interrupted.

Abstract: An tuner unit is provided for communications receivers with automatic self-balancing of the individual high frequency filter circuits. An assigned frequency applied to the desired receiver channel is fed to the antenna input during the automatic balancing process. The voltage of this assigned frequency picked up at the output of the filter circuits changes according to a stepwise increase of a tuning voltage controlled by a microprocessor. The tuning voltage is applied to the filter circuit to be balanced via a digital-analog converter and via a switching means controlled by the microprocessor. The automatic balancing is provided by switching the switching means successively to connect to the individual filter sections.