Abstract: A small gas turbine, in particular for powering airplane models, provided with a casing (3), a compressor rotor (1, 2), a combustion chamber (15-17) and a turbine rotor (5), the turbine rotor (5) driving the compressor rotor(1, 2) by a shaft positioned in a shaft tunnel extending through the combustion chamber (15-17) and surrounded by a helical fuel feed and vaporizing tube (22, 23), the combustion chamber (15-17) being defined by a cylindrical outer wall (15) and a frusto-conical inner wall (16) provided with combustion air intake orifices (19-21)the outlet side of the inner wall (16) of the combustion chamber extending into a cylindrical flow element (6, 7) forming an annular gap therewith, which in turn extends into the center opening of the turbine side guide vane ring (4) and is supported by the end (9) of the shaft tunnel (8), and the other end of the shaft tunnel (8) being secured to the casing (3) between the compressor rotor (1, 2) and the front wall (17) of the combustion chamber.

Abstract: The present invention relates to a dryer section of a machine for the production of fibrous web, such as a paper web. The dryer section comprises at least one dryer group having at least one drying cylinder and an endless porous support belt that guides the web around each cylinder. This is followed by a reversing roll being formed as a suction roll. With the web being supported by said porous support belt the web directly contacts said reversing roll. A distance of at least 150 mm is provided between the cylinder and the reversing roll. A sealing strip extends transversely over and close to the inner side of the endless porous belt in the region where web and belt are traveling off the cylinder. For deflecting the air boundary layer which arrives together with the belt, a sealing support beam also extends transversely over the inner side of the belt and supports the sealing strip.

Abstract: A dispensable, disposable shield for stethoscopes prevents the transfer of disease or other contaminants through the incorporation of a disc of plastic film material having a defined edge surface, a pull-tab along the edge surface of the disc, and an adhesive backing on the plastic film material disc, with the plastic film material disc having a contour for covering a diaphragm of the stethoscope and with the adhesive backing covering the entire contour of the disc and being peelably detachable from the stethoscope diaphragm after use. In a second embodiment, the pull-tab is replaced by a flap.

Abstract: A hearing aid with a microphone, a preamplifier connected behind it which is connected to a signal processing voltage-controlled circuit which is provided with a voltage-controlled filter, for example, which is connected to the output amplifier controlling an earpiece. In order to achieve the best possible adaptation it is provided that the signal processing voltage-controlled circuit is connected to a signal analysing circuit (MAC) controlling it, which is in connection on the input side with the preamplifier or output amplifier (30, 50) and is substantially formed by a Hilbert circuit (HS), the two outputs (A, F) of which supplying the momentary values of the frequency and the amplitudes of the input signal are connected to the inputs of corresponding Hilbert circuits via high-pass filters and the outputs of all three Hilbert circuits are in connection with the control inputs of a voltage-controlled signal processing circuit (40).

Abstract: Flat or curved micro heat pipe panels are fabricated by arranging essentially parallel filaments in the shape of the desired panel. The configuration of the filaments corresponds to the desired configuration of the tubes that will constitute the heat pipes. A thermally conductive material is then deposited on and around the filaments to fill in the desired shape of the panel. The filaments are then removed, leaving tubular passageways of the desired configuration and surface texture in the material. The tubes are then filled with a working fluid and sealed. Composite micro heat pipe laminates are formed by layering individual micro heat pipe panels and bonding them to each other to form a single structure. The layering sequence of the micro heat pipe panels can be tailored to transport heat preferentially in specific directions as desired for a particular application.

Abstract: A throttle device for stock suspensions in a paper machine including a feed line, a drain line and a spatially variable cavity connecting the feed line and drain line with each other. The cavities provided with a plurality of nestable walls in which the nesting effects a lengthening of the flow path.

Abstract: An interactive projected image video display system which includes a computer for generating video images, a projection apparatus coupled to the video output port of the computer for projecting computer-generated video images onto a projection screen, and at least one video camera for visually recording the projected image. The computer includes a frame grabber board coupled to the video camera for capturing individual frames or series of frames from the video recording of projected image. The captured images are compared to the computer generated images to detect for the presence of recognizable features introduced onto the projected image by a user to instruct the computer to trigger a computer operation. The system can also simulates a mouse to be used with any off the shelf application that uses a regular mouse.

Abstract: A method and apparatus for recording and playing back of a permanent digital information on a recording medium consisting of an insulating and a conductive layers of material, by creating spots of increased conductivity in the insulating layer.

Abstract: Thienothiazine derivatives of the formula ##STR1## in which X denotes a single bond, a straight chain or branched carbon chain having 1-12 C-atoms in the chain, it being possible for this chain to contain one or more double or triple bonds and/or two or more heteroatoms, Y denotes a single bond, and R denotes a monocyclic or polycyclic, optionally partly hydrogenated aryl, heteroaryl, arlyoxy, arylaza, heteroarylaza, arylthio or heteroarylthio radical which can optionally be substituted by lower alkyl, mono- or poyhalogenated lower alkyl, perfluorinated lower alkyl, alkoxy or halogen, and their use.

Abstract: A power supply which incorporates a high frequency inverter and which is suitable for use in conjunction with a florescent lamp. The power supply comprises a full wave rectifier (10) and a reservoir capacitor (12) connected across the rectifier for the purpose of providing successive half-cycles of the voltage waveform V2 across the capacitor with a minimum instantaneous voltage level greater than zero. A solid state switching device (14) and an oscillator (15) are connected in circuit with the reservoir capacitor. The oscillator generates a gating signal to the switching device. The switching device is arranged to provide an output voltage V4 which has a frequency determined by the applied gating signal V3 and which has a peak amplitude value which varies over successive cycles with the waveform of the voltage V2 across the reservoir capacitor.

Abstract: A brake assembly is universally mountable to any one of several different types and sizes of hand trucks. The complete brake assembly includes a brake control handle that is removably attached to the upper frame of the hand truck; a brake bar assembly having a base removably attached to the axle of the hand truck, and a horizontally extending brake bar with brake pads on its two ends adapted to engage the wheels; a cam mechanism for depressing the brake bar; and a cable coupling the brake control handle to the cam mechanism.

Abstract: A filter for sterile filtration of suspensions, comprising a pressure vessel, at least one candle filter element arranged in the pressure vessel, the at least one filter element having a hollow member with a lower portion which is formed as a filtering medium and an upper portion which is formed as a closed tube with an unwrapped self-supporting filtering medium, and a tube for carrying off a filtrate, the tube being formed as a central tube which is arranged in the hollow member and the filtering medium and is removable so as to permit inspection and cleaning of the filter element without opening the pressure vessel.

Abstract: A combustion chamber for a gas-turbine engine is disclosed in which the walls defining the combustion chamber may be easily attached to and removed from the engine structure. A dome member is attached to the engine structure such that it partially encloses the fuel injector nozzle in an upstream direction. The shape of the dome-member is such that it splits the incoming oxidizer flow into inner and outer flows which pass along the inner and outer sides of the combustion chamber. The inner and outer walls of the combustion chamber may be attached to an upstream end wall of the combustion chamber such that this assembly is removable as a unit from the dome member. The inner and outer walls, as well as the end wall, are releasably attached to the dome member such that the assembly can be removed from the gas-turbine engine without the necessity of removing or displacing the fuel injector nozzles or the dome member.

Abstract: A connecting fitting for connecting a rail of a drawer to a rear wall of the drawer includes a supporting member to be fastened to the rear wall. The supporting member is structured to be mounted on an upper corner of the rear wall thereby clamping an upper horizontal flange and a side flange of the rear wall.

Abstract: An incubator includes a housing (1) and a set (2) of shelves (3) for sample containers (8) containing cell cultures, for instance, positioned therein. In order to make it possible to use the incubator together with a robotic manipulator or similar device, the shelves (3) are fitted with guide elements (4) for the sample containers (8), the guide elements defining the relative positions of the sample containers. A door (6) in the front of the incubator permits access by a robotic manipulator. When the door (6) in the front of the incubator is closed, a door (6) in the rear of the incubator permits access to the inside of the incubator by operating personnel.

Abstract: Process for controlling the anisotropy of the mechanical properties of spunbonded webs through variation of the frequency of vibration of impingement panels at web laydown.

Abstract: A tool for applying surface coated abrasives on a machine for abrasion machining of cylindrical bearing surfaces on workpieces such as crankshaft journals and crankpins comprises for each bearing surface to be machined a pivoted arm mobile vertically and three pads for applying surface coated abrasives. A first pad is mounted at a median top position on the arm and the other two at lateral bottom positions on two jaws articulated to the arm and coupled together so that they can be clamped together so that when clamped onto the bearing surface to be machined the three pads are disposed substantially at the three corners of an equilateral triangle. Each pad has a concave surface coated abrasive application surface subtending an angle of greater than 60.degree. so that after clamping the three pads of each arm enclose the bearing surface to be machined substantially completely.

Abstract: A self-drilling blind tension rivet has a sleeve with a stop flange and a rivet shank and having at one end a drilling unit and at the other end a flattened section for engagement with a rotation and tension applying tool for drilling in and setting the blind tension rivet. The flattened section which extends over the major part of the length of the shank has roughened surfaces formed by transverse ribs and is limited by two elongated portions protruding radially beyond the outer diameter of a cylindrical part of the shank.

Abstract: A closure for a tube is a two piece stopper. The inner piece extends into the tube and the outer piece engages the exterior of the tube's sidewall. The outer piece has an inwardly extending shoulder which supports a projection of the inner piece. The two pieces are held together by a C-shaped washer that rests above the inner piece and in a channel formed in the outer piece.