Abstract: In a method for resurfacing a road, the road surface is first plastified and broken-up by first and second separable devices. The broken-up material is immediately distributed on the road surface by the second device, whereby the broken-up material is simultaneously rearranged and profiled or contoured without the introduction of fresh asphalt or bituminous material at this point of time. A road surfacing or repaver apparatus forming a third separate device then applies fresh asphalt or bituminous material onto the broken-up distributed, rearranged and profiled top surface of the road. Preferably, two distributions of the broken-up material are employed prior to the asphalt application and compaction of the broken-up and distributed material and the new asphalt material. A truck supplies fresh asphalt or bituminous material to the repaver.

Abstract: The present optical element for an astable laser resonator includes a subate of a material which is transparent to the respective laser radiation. In manufacturing the present optical element the substrate is ground and polished on both surfaces and a template or mask is secured to one surface of the substrate. The mask has a mathematically computed boundary configuration which provides a diffraction limited divergence for the finished optical element. In the areas not covered by the mask a highly reflective coating is applied, for example, by vapor deposition. The substrate area which is not covered by the highly reflective coating remains transparent to the laser radiation. Thus, the element is useful as the reflector and/or as a lens in an astable laser resonator.

Abstract: This protective coating, especially for aircraft bodies and the like, has one or more primer layers and one or more top coat layers, as well as an intermediate layer which is easily dissolved. The intermediate layer protects the primer when the top coat is removed for a new paint job.

Abstract: The production of a mat of wood chips and/or fibers, hereafter called wood particles, by a spreading station and a weighing device, is controlled in a closed loop circuit for uniformity, directly during the spreading of the wood particles. Several spreading devices form a spreading station. Electrical signals emanating from a tared weighing device which is arranged downstream of a first spreading device as viewed in the direction of travel of a conveyor belt, are used to control the output of the first spreading device. If desired, the output of one or more spreading devices located downstream of a weighing device may also be controlled in a closed loop circuit, whereby the weight of the partially formed mat moving over the weighing device produces the electrical control signal which is compared to a predetermined reference signal for controlling the production of the finished mat having one or several layers.

Abstract: A method and apparatus are disclosed for separating components from a flog medium by means of centrifugal force. The flowing medium travels through two stages. In the first stage a spin is generated and in the second stage the actual material separation is accomplished in one or several separating devices by means of one or several whirling or eddy sources. The apparatus includes a spin generator housing and separator chambers, whereby spin conduits extend into the separator chambers toward exhaust pipes to such an extent that a spacing is provided between the spin conduit and the exhaust pipe. At least one exhaust suction is tangentially effective in the area of this spacing.

Abstract: The present blood flow monitoring and control apparatus is especially use in connection with the so-called single needle technique, for example, for treatments such as dialysis, perfusion, or diafiltration. The blood pressure control is accomplished by a measuring chamber including a pressure equalizing device operatively connected between the blood cleaning apparatus and the blood pump. Sensors are operatively connected to the volume measuring chamber. The volume sensors provide electric control input signals to a control circuit which in turn controls the blood pumps and/or valves. A reading may be provided on a display or an alarm may be given when the blood pressure or blood quantity or volume is not within predetermined limits as calculated by an electronic computer.

Abstract: The present apparatus is constructed to convert or reconvert spin flow energy into pressure energy. For this purpose a conduit forms a chamber intermediate the ends of the conduit. The chamber and a flow control member operatively supported in the chamber are of rotational symmetry and so shaped that predetermined flow passage configurations are accomplished which facilitate the conversion of the spin flow into an axial flow.

Abstract: The present rotor head for a helicopter is free of flapping hinges and free of drag or lagging hinges. The rotor blades or wings are connected to the rotor head by a plurality of connecting plates which are flexible to bending moments. These plates are inserted into the blade roots of the helicopter wings and connected to the rotor head proper. The planes defined by these connecting plates intersect in the axis of the rotor blades or wings.

Abstract: In a pivotally mounted member of the memory fine tuning arrangement for a turret type television tuner, a pivotally moved lever plate provided integrally with a pivotal shaft having head portion, neck portion and body portion, is pivotally mounted on a front wall chassis base by setting the neck portion of the pivotal shaft into a notch of the front wall, wherein assembly of the lever plate to the front wall chassis base can be achieved by the two steps of inserting the head and neck portions of the pivotal shaft into a large opening portion of the notch in the front wall and slidingly setting the neck portion in a small opening portion from the large opening portion through continuous opening portion of the notch. To ensure easy and accurate assembly, a vertical support for the pivotal shaft on the front wall is affixed to the pivotally mounted member so that the parallel relation between the front wall and the lever plate is maintained.

Abstract: This invention relates to a gas turbine system having a gas generator, a power turbine, and a pump driven by said gas generator to provide bearing areas of especially the power turbine with lubricant.

Abstract: A screw strip for holding a row of parallel screws is formed of a flexible plastic material with sleeves which either only partially surround the screws, or have different wall thicknesses on different sides of the screws. The ribs interconnecting the sleeves have wall thicknesses less than the outer diameters of the screw threads. In a method for forming the screw strip, a plastic material is extruded only on one side of the threads of a row of screws, and it is then pressed by means of grooved rollers to be formed into the sleeves which only partially surround the screws.

Abstract: A hydraulic eddy brake has a rotor and a stator both forming an eddy chamber. Liquid supply conduits lead to the center of the eddy chamber. The rotor shaft is sealed relative to the housing formed by the stator. The sealing is accomplished by noncontacting sealings. Leakage liquid is discharged to respective chambers located between the bearings and the eddy chamber proper. A gap is provided between the shaft and the housing. This gap is connected with the center of the eddy chamber through a liquid feedback which may include an intermediate chamber and respective liquid feedback conduits whereby the pressure at the point of leakage is minimized. Such brakes are used as absorption dynamometers to measure torque.

Abstract: The present noise absorbing or damping devices are shaped as funnels or horns of various configurations which may be coiled, spiraled, rolled and/or bent or twisted. The open funnel mouth of each funnel faces toward the source of the noise. The volume confined by the funnel walls may be filled with noise absorbing material such as an open cell foam. Preferably at least the funnel neck is filled with such material. A plurality of funnels may be arranged on the walls of a room and the funnel mouths facing into the room may be covered with blankets or mats of noise absorbing material.

Abstract: An adapter for connection to a liquid faucet comprises an inlet member, a coaxial outlet member, and a valve device which is rotatable relative to the outlet member about an axis common to the inlet and outlet members. The inlet member is connectable to the outlet end of the liquid faucet. The outlet member has several outlet openings or groups of outlet openings separated from each other. The valve device is rotated in order to continuously adjust the opening ratio between the various outlet openings of the outlet member relative to each other, thereby providing a precisely regulated amount of liquid which is branched off from the liquid faucet for operating auxiliary devices such as a douche.

Abstract: This apparatus stores natural energies available on and/or under the surf of the world's oceans. Such energies include solar energy, wave energy, wind energy, as well as energy stored in the heat of the sea water. The energy extracting and storing equipment is installed on a floating vessel or raft. The energy storing equipment includes flywheel type rollers or cylinders driven by electric motors energized by electric generators which in turn receive their energy from the energy extracting equipment. The flywheel type rollers or cylinders include a supporting hollow cylinder having a relatively thin wall onto which there are wound fibers impregnated or embedded in a synthetic resin.

Abstract: Isotopes are separated from a gas mixture by accelerating the gas mixture containing the isotopes to ultrasonic speeds sufficient to bring the gas temperature to 150.degree. K or less. Simultaneously, the gas is subject to a pressure well above the vapor pressure of the gas at said temperature. Under these conditions the gas is subjected to a laser radiation having a wave length corresponding to the absorption line or band of the molecules containing the isotopes to be separated, whereby the molecules are excited so that they may be separated by conventional devices. The present apparatus has a high pressure reservoir supplying the gas mixture through a device for producing said ultrasonic speeds into an expansion chamber. As the gas flowing at said speeds is irradiated by the laser beam, it expands into a low pressure reservoir. The laser is arranged so that the laser beam extends across the expanding gas flow at a point where the expanding gas does not yet start to condense.

Abstract: An apparatus for treating hydrocephaly has one housing which contains subcutaneously immplantable components for the measuring and controlling of fluid pressure. A second housing adapted to cooperate with the components in the first mentioned housing, contains the measuring and control components which remain outside a patient's skin. The components in both housings and the housings themselves are arranged for cooperation with each other, whereby an intracerebral space may be automatically drained in response to a predetermined, adjustable pressure.

Abstract: A suspension of solid particles in a liquid is produced and maintained by riodically moving agitating elements up and down in an elongated, flat bottom container. The agitating elements may, for example, be baffle plates, grids or the like, which are moved up and down either in a linear or in an angular movement. Preferably, two sets of agitating members are arranged so as to pass through each other in their periodic up and down movements. A carriage having mounted thereon a pump and a spray nozzle is movable alongside the elongated container with an intake of the pump reaching into the container without interfering with the moving agitating elements.

Abstract: Plate connectors are secured to the free ends of belts, such as conveyor belts, by means of staples, the protruding ends of which are bent over. Preferably, there are recesses at least in one outer surface of the plate connector. The bent over ends of the staples are preferably cut-off in a plane corresponding substantially to the outer surface of the plate connector, whereby a portion of the bent over staple end is received in its respective recess. The recesses may, however, also be shaped and sized so as to hold the entire bent over end of the staples without severing the ends.

Abstract: The present noise reducing apparatus includes resonators which have a small and variable volume as well as a high admittance. For this purpose the resonators constitute vibrating systems having at least one volume wherein the pressure is reduced below atmospheric pressure to provide a reduced volume stiffness. The volume is confined by wall elements having a very small or a negative spring rate under reduced pressure inside said volume.