Abstract: The implant is made of two members which are relatively movable relative to each other. One member is made of hard material while the second member is made of a soft material. In addition, a plurality of support members of hard material are embedded in the soft member and each has a sliding surface to receive the hard member thereon in bearing relation.

Abstract: A yarn brake which can be used in projectile looms and rapier looms is actuated by a stepping motor with the rotational movement of a drive shaft of the stepping motor being converted to a linear movement of the braking member of the yarn brake.

Abstract: The gripper loom has picking tapes and rapier heads whose centers of gravity are disposed above the top of the tape. Between the tape wheels and the shed, tape guides are provided to impart to the picking tapes an inclined direction of movement towards the shed. Due to these inclined tape guides, disengagement of the rapier heads from the raceway in the shed can be obviated, with a consequent reduction in the frequency of warp yarn breakages.

Abstract: The ligament prosthesis is formed of concentric tubes of filaments threads. In addition, a layer of elastomer is disposed over at least the outermost tube to act as an impermeable layer to the passage of abraded material from within the tubes into the lining. The thickness of the elastomer layer is at most 0.1 millimeter. The elastomer may also be provided on and about the threads of the inner tubes to reduce a migration of abraded particles therein.

Abstract: The rapier loom employs a runner on the underside of a picking tape at the rapier head in order to space the picking tape from the guide teeth used to form a slideway for the rapier within a shed of warp yarns. The runner may have a convex shape while the guide teeth have a curvilinear shape to slidingly support the runner. Alternatively, the runner may have a longitudinal groove to receive the guide teeth. A guide bar may also be disposed outside the shed to form a slideway for the runner while also being spaced from the picking tape.

Abstract: The traversing shed loom has a shedding weaving rotor into which weft yarns are picked. The rotor has shedding elements and beating-up combs in which warp placing guides place warn yarns by moving transversely to the direction of rotor rotation. Most of the warp yarns are deflected transversely to the direction of rotation during shedding and the deflection is cancelled only by the shedding elements moving away before the beating-up of the weft so that the warp yarns are realigned. The beating-up combs have at least two warp yarns per occupied space. The position of guides, the geometry and position of the combs, the position of top shed guides and bottom shed guides and the warp yarn placing program are so adapted to one another that the streakiness, i.e., warp streakiness, is controllable.

Abstract: In the method of forming a ceramic body, such as for use as a packing body, a dried array of corrugated layers containing ceramic material is first obtained in a green state. Thereafter, the array is cut, for example using a saw, into a desired shape and, thereafter, fired at a firing temperature sufficient to form the array into a one piece ceramic body. The body may initially be cast in a mold which can be cut to shape prior to the final firing step. Alternatively, individual layers of glass fiber material may be coated with ceramic material and dried into the green state prior to cutting and firing.

Abstract: A bone implant is provided with undercut anchoring areas for bone tissue which extend from the surface of the implant into the interior. Geometrically shaped cavities are generated through the openings in an interconnected manner to provide for the ingrowth of bone tissue. A high pressure liquid jet is used to form the cone-shaped cavities in the implant on spacings to provide for intercommunication between the respective cavities.

Abstract: The prosthesis has a valve at one end formed of a fixed base and a coiler body which is able to rotate on the base. A flexible elastic body defining a hollow chamber extends from the coiler body and is able to receive filling medium via the valve. A compact strand extends from the free end of the elastic body. An instrument is provided for implanting the prosthesis between two vertebrae along with a drive belt for rotating the coiler body about the fixed base and, thus the elastic body about the coiler body. Filling of the elastic body takes place after coiling.

Abstract: A distillation plant is constructed with an evaporator, separator and distillation column integrated together on a common vertical axis so as to eliminate bends and reduced cross sections in the product flow. The distillation column employs a regular packing to further reduce the pressure drop and operating temperatures over the height of the column. The overall pressure drop in the distillation plant is held to a range of less than 20 mbar.

Abstract: A plastic acetabulum is provided with a plurality of cavities in the outer surface. Each cavity opens conically to the exterior of the acetabulum and the cavities are disposed in concentric rows about the axis of the acetabulum. The cavities are provided with a roughly fixed ratio of depth (t) to width (w) with the volume (v), depth (t) and width (w) decreasing from an edge of the acetabulum to a peak of the acetabulum. The depth and width of the cavities each decrease exponentially in proportion to the ratio of the diametric spacings of the cavity rows. Likewise, the volume of the cavities decrease exponentially from row-to-row in the direction of the peak of the acetabulum.

Abstract: A femoral head prosthesis is provided with a slot which extends from ventral to dorsal within the distal zone of the stem to separate a tongue-like core from a resilient peripheral portion. The tongue-like core is able to move in the slot in response to bending and twisting stresses. The shear forces which these stresses produce in a transition zone between the bone and the stem are thus, at least, reduced. The slot may be of U-shape with arms parallel to the sides of the stem or with arms parallel to the axis of the stem. One arm of the slot may also be shorter than the other and one arm may be of widening shape relative to the other.

Abstract: A prosthetic ligament implant is sheathed at one end in the sock in order to facilitate pulling of the implant through a hole drilled in a bone. The sock is provided with a separable proximal portion which does not envelope the implant and which can be cut off after pulling of the implant through the hole in the bone. With removal of the proximal portion, the remaining textile structure of the sock becomes asunder so that the sock can be readily pulled off from the end of the implant.

Abstract: A device for determining small amounts of impurities in gases comprises a measuring cell in which an arc is generated with a low frequency alternating voltage source between two electrodes. The emission spectrum of the arc is observed by means of interference filters and photosensors and the concentrations of the impurities are determined in the electronic evaluation unit for the spectral intensities typical of the impurity traces. The device is suitable for the continuous measurement of small quantities of gaseous impurities for example traces of nitrogen, argon, neon, water vapor, gaseous hydrocarbon, in helium.

Abstract: The percussion device which can be used as a hammer drill has a drive piston for driving an overhung percussion piston which is mounted between two air cushions. Depending on the percussion travel of the percussion piston, the percussion air cushion is reversed so that a respective partial quantity is passed around the percussion piston to the opposite side by a central bypass. A no-load bypass is also provided to vent the recoil air cushion to the percussion cushion for a no-load condition. A third bypass bridges the drive piston in the top dead center position to communicate an annular chamber to the rear of the drive piston with the percussion cushion.

Abstract: The catalyst element consists of a carrier structure in the form of static mixer elements which are provided with a washcoat covering, the surface of which contains a catalyst. The carrier structure may consist of a metal skeleton or may be constructed of a solid ceramic material.

Abstract: An arrangement of troughs is disposed above a liquid/distribution tray in a counter-current column for collecting and mixing liquid from an upper exchange portion prior to distribution onto the tray. The arrangement includes duct-like troughs each of which has a base with a closed first part and a second part with at least one outlet for liquid. As a result, the liquid trickled into each trough is mixed transversely prior to being expelled onto the distributor tray thus levelling out any differences in concentration along the length of the trough.

Abstract: A regular economically producible packing of use in chemical engineering equipment is described. Physico-chemical phenomena in thermal separating and mixing apparatuses in particular are associated with contacts between different phases in cocurrent and countercurrent operation. The important feature of an appropriate packing design is to intensify transverse mixing in the flowing phases and to intensify contact between them. This purpose is served in the packing according to the invention not only by known fan-like vane elements but also by a number of channels rows which are parallel to one another and offset from one another, the effect of such rows being to boost transverse mixing and phase contact of the flowing media, more particularly when the lighter phase flows at elevated speed.

Abstract: A pivotally mounted yarn guiding member is disposed between a weft yarn injector and a shed of warp yarns to effect drawing in of a fresh weft yarn as well as extraction of a broken weft yarn from the loom. The yarn guiding member is pivotable into a bottom position after receiving a fresh yarn end to deflect the yarn about a centering vane so that a shears may cut the yarn to form a fresh yarn tip for subsequent picking. The yarn guiding member is pivotable between a central position and a top position after receiving a loop of a broken weft yarn so as to extract the broken end of the yarn from within the shed or from the point upstream of the injector nozzle. An extraction duct is also provided on the exit side of the shed to extract the broken piece of the weft yarn via a reciprocating motion and suction. A hooked needle is also provided to effect formation of a loop of yarn for extraction by the yarn guiding member when a brake occurs upstream of the injector nozzle.

Abstract: The acetabular prosthesis includes a metal supporting shell having collar-shaped projections which have tapered cutting edges for penetrating into the osseous tissue of a pelvic bone. The distal portions of the projections are tapered so that plugs of bone can be formed upon penetration of the projections into the osseous tissue. The projections may be filled with bone chips prior to fitting in of a plastic shell within the metal supporting shell. A multi layer metal mesh is provided on the outer surface of the metal shell for promoting fusion. If the overall attachment is not adequate, the projections can be used for insertion and centering of bone screws.