Abstract: The invention is concerned with a rod shaped constructional element comprising a core of foam material at least one first layer of fibers mounted on said core, said fibers extending in a direction parallel to the axis of said core at least one second layer of fibers mounted on said first layer, said second layer of fibers crossing each other at an angle to said axis; and at least one disc element disposed transversely in said core.

Abstract: The surface of the body is provided with grooves (5), which extend in the flow direction and which are separated from one another by ribs (4) which are constructed to have sharp edges. The surface is composed of a multiplicity of individual elements (3), which have the ribs (4) and grooves (5) on their side facing the flow. The individual elements (3) are disposed relative to one another and/or constructed in such a manner that slits are formed on the side facing the flow between the ribs and grooves. The slits (9) are connected with one another by channels (6) disposed below the surface of the individual elements (3) which faces the flow.

Abstract: A method for removing heat from a refrigeration load in a cyclically operating Gifford-McMahon refrigeration apparatus, with which in each cycle a compressed cooling gas from a high-pressure inlet is brought into heat contact with a regenerator cooled during the previous cycle and thereby cooled, the cooling gas is subsequently conveyed to a storage volume via the refrigeration load, the cooling gas is then expanded after closure of the high-pressure inlet by opening a low-pressure outlet and thereby cooled, and the cooling gas is partially conveyed by means of a displacer piston from the storage volume to the low-pressure outlet via the refrigeration load and the regenerator, refrigeration capacity hereby being transferred to the refrigeration load and the regenerator hereby being cooled.

Abstract: A method and device is provided for determining the direction and speed of wind in the atmosphere by means of a laser-Doppler anemometer, wherein only values measured in a sector of about 100.degree. and less of an azimuth scan are supplied or fed to a multiple-peak finder of a measuring device. In order to attain a high processing speed, flowing differentiation takes place by means of digitally operating systems. In order to eliminate the influences from clouds, haze, fog and the like in the measuring device, several frequency maximums are always traced in the multiple-peak finder, whereby in each case a preceding maximum is related to a trailing maximum until the trailing maximum is smaller than the preceding maximum. Because of the attainable high-speed sector scanning, the measuring device can be used for the determination of multiple wind peaks caused by clouds and/or fog echoes, or at an installation site where the measuring range is highly restricted, or also for detecting aircraft wake vortices.

Abstract: Generator for producing aerosols from liquids including an atomizer mounted in a vessel which is provided with an aerosol outlet. The outlet of the vessel is connected to an ejector operated by a gaseous driving agent. The atomizer is assembled from a plurality of vertically spaced rings with annular liquid outlets, a supply of compressed gas is discharged across the outlets causing the liquid to be drawn upwardly through the outlets.

Abstract: An apparatus for magnetocaloric refrigeration, comprising a ferromagnetic terial arranged in a rotor and alternately entering and exiting from a stationary magnetic field when the rotor rotates, and also comprising a circuit for a working gas coming into successive heat exchange contact with a ferromagnetic material arranged outside the magnetic field and thereby cooled, a refrigeration load, a ferromagnetic material located within the magnetic field and thereby heated as well as an external negative heat source.

Abstract: There is provided by the present invention an optical-electronic rangefin having a housing adapted to be integrated in the gripping arm or mechanism of a robot and housing a light transmitter transmitting a well focussed high intensity light beam, a light receiver having a position detector, a pulse-electronic circuit for controlling the light transmitter and an amplifier circuit for transforming the currents received from the position detector into proportional voltages. The light transmitter and light receiver are so disposed with respect to each other that the central axis of the light transmitter and the optical axis of the light receiver define a predetermined acute angle between each other.

Abstract: The invention relates to a method of operating a heat pump system in an absorption heat pump mode and/or boiler heating mode. According to this method, a solution of a refrigerant in a solvent is heated in a boiler, the evaporated refrigerant is delivered either directly to an absorber through a condenser, a throttle and an evaporator when the system is operated in the heat pump mode, or directly to an absorber when the system is in the boiler heating mode. The refrigerant is combined with the solvent that is drawn, low in refrigerant, from the boiler. The rich solution thus obtained is redirected to the boiler. To shut down the system, the heating of the boiler is turned off.

Abstract: The specimen (P) can be turned about each of three axes (A, B and C) by rtion of the input shaft (10). The apparatus exhibits three brackets (H1, H2, H3) mounted on each other in the manner of a cardan joint and supported by the frame (GR). The first bracket (H1) is fixed on the frame (GR) via a clutch coupling (K1). Additional couplings (K2 and K3) connect the second bracket (H2) to the first bracket (H1) and the third bracket (H3) to the second bracket (H2). Of the three couplings, only one is ever released, while the two others are engaged. In this manner the specimen (P) can describe a movement about each of the three axes by rotation of the single input shaft (10).

Abstract: The invention relates to a method for the representation of video image sequences or scenes with a relative movement between a pick-up sensor and the viewed scene, such scenes being transmitted at reduced frame rate. By interpolation and/or extrapolation on the basis of two transmitted frames intermediate frames are generated on the receiving end of the transmission line and inserted into the transmitted frame sequence. The positions of image points (pels) which are identical in the two transmitted images are determined from the relationship of the pel positions for at least two identical pels on different vertical and horizontal coordinates in each of the two transmitted frames. Before reconstruction of the intermediate frames the mean brightness values for limited picture areas which represent the environment of at least one of the corresponding pels in two successive transmitted frames are determined.

Abstract: Boom of the wishbone-type for sailing boards, where the spars (4,6) at le have a core (12) made from a rigid foam, which has essentially plane surfaces on the inside and outside of the spars, which extend across a significant section of the length of the core. On the plane surfaces there are arranged synthetic-resin-strengthened UD-slivers (22), which extend in the longitudinal direction of the spars across the length thereof, and there is provided an outer layer (24) from a synthetic-resin-strengthened fibre fabric or braiding with slivers intersecting at an angle of between 30.degree. and 60.degree. to the longitudinal extension of the spars. The UD-slivers (22) are preferably arranged between the inner and the outer fabric layer (20,24) in the form of previously cured CFK-UD-strips.

Abstract: A method and apparatus for the combustion or gasification of highly viscous nd/or suspended fuel in a burner flame. The fuel is introduced, in a nozzle, and in the form of a continuous, thin, annular layer, into a stream of atomizing medium, with the aid of which the fuel is atomized. The fuel is guided onto the inner wall of the nozzle as a continuous film at a velocity that is low with regard to wear action. The fuel is atomized at a terminal portion of the nozzle that has a knife-edge configuration. The fuel and the atomizing medium stream that flows within the annular film discharge at a minor resonant velocity.

Abstract: The invention relates to a method and apparatus for desulfurizing flue gas n fuel oil firing systems comprising a residual heat exchanger forming an acid condensate. A neutralizing agent is added to the acid condensate and the neutralized condensate recirculated to the residual heat exchanger for the purpose of dissolving sulfur dioxide. The apparatus for carrying out this method in a fuel oil firing system comprising a residual heat exchanger and a collecting tank for the condensate is provided with a pump and a tank filled with neutralizing agent which are both disposed in a condensate recirculation conduit leading from the collecting tank to the residual heat exchanger.

Abstract: In an apparatus for medical treatments, examinations or tests comprising a hamber connectible to a vacuum source and having at its one end side a passage aperture with a flexible sealing member, the chamber is formed of a foldable bellow provided with a support structure adapted to be dismantled. In axial direction of the bellow, the support structure contains a plurality of substantially parallel-mounted peripheral members backing up peripherally the bellow and being mobile relative to each other, as well as mobile longitudinal stiffening elements secured to the peripheral members.

Abstract: A rear support balance is utilized for measurement of the six components of he flight mechanics axis system for models mounted in wind tunnels. The balance has a balance body that is inserted between the model and the mounting. The balance body has an action beam 2 and a reaction beam 3 between which piezoelectric measurement pickups are arranged the respective emitted electric charge of which is a measure of the respective component.

Abstract: There is provided a process and system for the memory-saving programming of he motional actions of a robot wherein a reference course is recorded first in the form of samples, which are then stored. For reducing the storage space, the recorded and stored samples are transformed into a Fourier matrix .sub.0 C by means of a Fourier analysis. Said matrix is then filed in a memory. From this Fourier matrix .sub.0 C, it is possible to derive Fourier matrices for courses with the same configuration, but with any desired position and orientation solely by a linear transformation of the coordinates in the form of a Fourier matrix .sub.1 C. With the help of the dynamical model of the robot used, the derived Fourier matrix .sub.1 C can be modified with adjustment to the desired speed, so as to compensate for the dynamical errors in the motional actions of the robot.

Abstract: PID characteristics of a closed-loop type controller compensation network for a hydraulic pulsing machine coupled with a test specimen are adjusted by determining the closed-loop stability locus of the network and adjusting PID characteristics until the stability locus is located at a desired position.

Abstract: A ring laser for a ring laser type of gyro having a block with an optical resonator cavity therein and three corner mirrors and an amplifier element for optical frequencies. The amplifier element is adjustable and alignable with respect to the block in such a way that it is adaptable mechanically to the beam path resulting from the mirror arrangement determined by the production technology. The production depends basically on arranging the mirrors in such a way that a resonant beam path results. As tolerances with regard to the accuracy of the position of the amplifier element are considerably lower than those with regard to the positions of the mirrors, the position of the amplifier element is specified.

Abstract: The simulator is equipped with a multipartite support comprising a part for the accommodation of a model. The parts of the support are arranged telescopically in the form of an approximate semicircle. Hydrostatic bearings are used as mountings.

Abstract: A ring laser particularly for a ring laser type of gyro in which the ring ser includes three corner mirrors and a separate gas discharge tube arranged in a recess in a block. The gas discharge tube is mounted on the block longitudinally of the beam path by at least one piezo electric drive. The modulation amplitude of the separated beam portion is measured by a control circuit and is converted into a high voltage adjustment signal for the drive as a function of the modulation amplitude. Two drives may be spaced apart in the longitudinal direction of the gas discharge tube and these can be controlled independently of each other. Although the beam path may be displaced as a result of thermal expansion and/or bending of the block, the gas discharge tube may be kept exactly coaxial with the beam which traverses it.