Abstract: In a pulsed gas laser apparatus for operation at ambient pressure comprising a laser module having a tubular window open at its distal end for the coupling or uncoupling of a laser beam, the tubular window has a volume which is at least equal to, or a multiple of, the volume change of the laser gas in the module during pulsed laser operation and extends essentially vertically from the laser module. The window includes a mixing zone in which during pulsed laser operation both laser gas and ambient gas are present, the window extending downwardly if the laser gas is lighter than the ambient gas and upwardly if the laser gas is heavier than the ambient gas thereby to counteract infiltration of ambient gas into the window. Also, means are provided for controlling the laser gas volume supplied to the module such that the concentration of the ambient gas in the mixing zone in the window remains below a predetermined limit.

Abstract: In a hollow cylindrical structural member consisting of resin impregnated fibers wound in alternate layers of circumferential and helical windings disposed on top of one another and having reinforcing support ring structures formed at its axial ends by additional circumferential windings, the additional windings include inner and outer layers of windings of different strength fibers wherein the fibers of the outer layers have a modulus of elasticity which is smaller than that of the fibers of the inner fiber layers so that, particularly for use with high speed rotors, the centrifugal forces do not cause separation between outer and inner layers.

Abstract: A recipient for a gas ultracentrifuge which comprises an oblong cylindrical shell having a lid closing each end, a base flange having an upper end surrounding one end of the shell and a plastically deformable ring interposed between the base flange and the shell. In an embodiment of the invention, the plastically deformable ring comprises a ring-shaped section and a welding shoulder which forms a ring-shaped collar integral with the base flange, the thickness of the shell being greater than that of the ring-shaped collar and about the same thickness as that of the welding shoulder.

Abstract: A method of producing a collar on a cylindrical composite fiber body, wherein the composite fiber body has a longitudinal axis and wherein a plurality of layers of resin impregnated fiber windings are wound to form the composite fiber body, after which the resin is hardened, includes the following steps: (a) forming a bead by winding resin impregnated fiber windings circumferentially about the cylindrical composite fiber body such that the bead has continuously rising flanks on both longitudinally spaced sides; (b) providing two clamping sleeves, each clamping sleeve having an end face extending substantially orthogonally to the longitudinal axis of the composite fiber body, a conical surface portion adjacent the end face, and an interior surface portion which is adjacent the conical surface portion and which conforms to the outer surface of the cylindrical composite fiber body; (c) applying the clamping sleeves about the composite fiber body while the composite fiber body is still wet, such that each end fac

Abstract: A method of converting the laser radiation of a pump laser into another wavelength range by stimulated Raman scattering in which the laser radiation of the pump laser is conducted through a Raman medium, thus generating Stokes radiation in the other wavelength range, and an arrangement for implementing the method. The laser radiation from the pump laser leaving the Raman medium and the generating Stokes radiation are fed together to an amplifier for the laser radiation of the pump laser, and the thus amplified laser radiation of the pump laser is conducted together with the accompanying Stokes radiation through a further Raman medium for conversion of the amplified laser radiation of the pump laser into Stokes radiation.

Abstract: A method of producing an elongate article comprises the step of providing, by winding a filament, a plurality of superposed layers to form a hollow cylinder having open ends. At least one of the layers is formed of a circumferential winding and at least one of the layers is formed of a cross winding. The cross winding has fibers having a negative coefficient of thermal expansion and is oriented at a predetermined inclined angle to the cylinder axis. The method further comprises the step of securing to the open ends of the hollow cylinder end pieces comprised of a material having a high surface hardness and dimensional stability. The inclined angle has such a magnitude that temperature-caused changes in the axial length of the hollow cylinder compensate for temperature-caused changes in the axial length of the end pieces.

Abstract: A separating pot for glandless electrical or magnetic drive assemblies includes a pot jacket having a generally tubular body with two ends and a flange portion at one of the two ends, the pot jacket being composed of fiber reinforced plastic with the fiber being wound in alternating layers of circumferential windings and helical windings, and with the flange portion being composed of additional circumferential windings; a bottom member disposed within and closing off the other of the two ends of the pot jacket, the end of the pot jacket being an open end, the bottom member having a generally cup-shaped portion which includes a rim portion surrounding an interior bottom face, the rim portion facing the open end of the pot jacket and extending in an axial direction away from the interior bottom face, the bottom member being in a press fit with the pot jacket and being glued to the pot jacket, the rim portion having a generally conically-shaped interior surface which is enlarged in a direction away from the inte

Abstract: The process of the present invention provides a gas steam of a mixture of UF.sub.6 isotopes and an inert gas, e.g. nitrogen, which is adiabatically expanded through a nozzle into a laser light excitation zone and photodissociated to form U-235 enriched UF.sub.5.After the gas stream has passed through the laser light excitation zone, XeF.sub.6 is fed into the process gas stream so the the xenon hexafluoride remains protected against the dissociating radiation. The XeF.sub.6 may be mixed with the same inert gas that is employed for the adiabatic cooling of the UF.sub.6. The XeF.sub.6 reaction with U-235 enriched UF.sub.5 produces a stable complex of UXeF.sub.11, which polymerizes to poly(pentafluoroxenonium(+1)-hexafluorouranate V), an intermediate product of the present process. The intermediate product may be thermally decomposed to form U-235 enriched UF.sub.6 or U-235 enriched .beta.-UF.sub.5.

Abstract: A tester for use in testing coordinate measuring devices includes a hub having a generally tubular body portion, an outer ring, and a plurality of spokes connected to the hub and to the outer ring, each of the spokes having a generally tubular body portion and extending radially from the hub. A plurality of holders are connected to respective ones of the plurality of spokes, and elements respectively supported by the holders are provided which are adapted for use in testing the coordinates of a measuring device. The generally tubular body portion of the hub and the generally tubular body portion of each of the spokes is composed of a bonded fiber material in which layers of circumferential windings alternate with layers of helical windings, and wherein the helical windings are wound of a fiber which has a negative coefficient of thermal expansion.

Abstract: An apparatus for the coupling of laser radiation into a microwave waveguide, in which the laser radiation and the microwave enter the waveguide perpendicular to one another and, after the microwave is deflected, exit the waveguide colinearly. To enlarge the cross section of the laser beam to be coupled and to be able to adjust it to the microwave waveguide, the invention provides that the entry aperture for the laser beam incorporates a corrugated bandstop filter, and that the entry aperture for the microwave is configured in the manner of an orthomode coupler.

Abstract: An apparatus for making a rotationally symmetrical body formed of crisscross-wound layers, comprises a rotatable winding mandrel, a carriage arranged for travel back and forth along the mandrel; and a thread laying mechanism for receiving simultaneously a plurality of threads from a thread supply and for depositing the threads on the mandrel during rotation thereof and during the back-and-forth travel of the carriage. The thread laying mechanism has a laying roller having a peripheral surface void of grooves. The threads are trained about the peripheral surface of the laying roller and deposited therefrom onto the winding mandrel. The thread laying mechanism further has a guide element for receiving the threads and advancing them to the peripheral surface of the laying roller in predetermined distances from one another.

Abstract: A method and system for measuring the dynamical behavior of an elongate body which has a floating electrical potential and only forms a total capacitance with its environment and which has a longitudinal axis about which the body rotates, which method includes a contact-free capacitive measurement of changes in the position of the body transverse to the longitudinal axis by means of at least two measuring probes each disposed to form with the body a respective capacitor having a capacitance value corresponding to the distance between the probe and the body, the measurement being performed by: applying to each measuring probe a respective alternating current signal having a frequency selected such that the frequency of the signal applied to each probe differs from that applied to each other probe by at least a selected frequency difference value; deriving from each probe an output signal having an amplitude representative of the capacitance value of the capacitor formed by that probe with the body; and passing

Abstract: A process and apparatus for infinitely variably setting the U.sup.235 tails concentration in the operation of centrifuge cascades for the separation of the uranium isotopes in a gaseous uranium isotope mixture, comprising introducing a cascade feed comprising a mixture of gaseous uranium isotopes containing U.sup.235 into a feed header of an intermediate stage, equalizing the pressure in the feed header of each stage to the pressure of the cascade feed, and maintaining a predetermined U.sup.235 product concentration by manipulating a choke valve on product or tails streams from each stage, or a choke valve on the cascade feed stream to vary the ratio between the cascade feed and the cascade product stream to adjust the U.sup.235 concentration and the tails.

Abstract: Radiation measuring probe for contactless measurement of the surface temperature of an object, independent of the emissivity of the object. The probe includes a radiation receiver and a housing having interior surfaces defining an interior space. The radiation receiver is disposed in the interior space, thermally insulated with respect to the housing. The housing includes a shield which has a shield surface facing outwardly so as to be towards a surface of an object whose surface temperature is to be measured. The shield has an aperture opening into the shield surface, communicating with the interior space and through which thermal radiation emanating from the object impinges on the radiation receiver. The shield surface is blackened and configured to correspond to the contour of the surface of the object, and the interior surfaces of the housing are of low emissivity.

Abstract: A roller for paper or foil sheet handling machines such as printing presses comprises a cylinder consisting of fiber reinforced plastic material including alternate layers of circumferentially wound fibers and helically wound fibers. The helically wound fibers are arranged in groups of strings which are spaced from one another so as to form rhombus-shaped depressions in the surface of the cylinder, thereby providing rollers of relatively low masses but high strengths which have surfaces capable of firmly engaging the paper or foil sheets.

Abstract: A rotor for use with a hysteresis motor in combination with a centrifuge rotor having a hub. The motor has a stator with an axial length and the motor rotor has a region coextensive with the stator. The motor rotor includes a hollow cylindrical body made of a magnetizable material, having one end firmly connected to the hub, and having a wall with a first thickness in the region that is coextensive with the stator and a second thickness, smaller than the first thickness, which is outside of the region that is coextensive with the stator and which is in the region of the connection of the cylindrical body with the hub. The point of transition from the first thickness to the second thickness of the wall is a predetermined distance from the nearest point of contact of the hub with the cylindrical body so as to increase the magnetic resistance between the hub and the cylindrical body.

Abstract: An apparatus for making a rotationally symmetrical body formed of crisscross-wound layers includes a winding mandrel, a carriage reciprocating along the mandrel and a thread laying assembly mounted on the carriage. The assembly has a pivotal device, and four thread laying rollers mounted for rotation on the pivotal device. The shafts of the rollers extend parallel to one another and are situated at points of an imaginary equilateral trapezoid having a plane perpendicular to the roller shafts. Each roller has a plurality of circumferential grooves for simultaneously guiding and depositing on the mandrel a plurality of parallel-running threads. Two rollers are situated on one side of the pivot axis of the pivotal device and form a first roller pair and two rollers are situated on an opposite side of the pivot axis and form a second roller pair.

Abstract: A method for metallizing the surface of a carbon fiber reinforced plastic member by vapor-deposition of a metal layer in a high vacuum, with a glow treatment taking place before the vapor-deposition process. The surface of the plastic member to be metallized is removed until the carbon fibers lying closest to the surface are partially exposed. The plastic member is then degassed. A negative high voltage is applied across the degassed plastic member to bring about a glow treatment of the plastic member before the metal vapor-deposition. The glow treatment is continued into the initial phase of the metal vapor-deposition process.