Abstract: Thermoplastic polyphosphonatocarbonate prepared by polycondensing at least one aromatic dihydroxy compound with a diaryl carbonate and a phosphonic acid diaryl ester in the presence of a basic polycondensation catalyst at a temperature of from 80.degree. to 340.degree. and under a pressure of 600 to 0.1 mm Hg in an inert gaseous atmosphere, the molar ratio of diaryl carbonate to phosphonic diaryl ester being from 5:95 to 95:5 and the molar ratio of aromatic dihydroxy compound to the sum of diaryl carbonate and phosphonic acid diaryl ester being from 0.91:1 to 0.99:1, and following polycondensation, neutralizing said basic catalyst.

Abstract: A cross country ski binding for securing a ski shoe by a forwardly directed extension of its sole to a ski features a recess defined between two side walls, a top wall and a base plate with at least one and preferably two bracing members arranged within the recess and extending vertically at right angles to the top wall of the recess. The bracing members are adapted in operation to engage in corresponding longitudinally extending slots in the sole extension and serve to stiffen the recess and to react the tilting moments occuring during skiing. A securing device in the form of a toggle lever mechanism includes a hooked member which serves to engage behind a corresponding projection on the sole extension to draw the same into the binding and to prevent the ski shoe from moving rearwardly out of the binding.Various modifications are disclosed including an embodiment in which the bracing members are formed by inwardly turned portions of the sheet metal base plate of the binding.

Abstract: A toggle lever type cross-country ski binding is provided which includes a retaining element pivotally attached to guide arms hingedly supported on a baseplate fixed to a ski. In operation, the retaining element is movable through a dead-center position between a lifted release position and a lowered in-use position with a hook-shaped projection engaging with a boot sole extension to hold the same against longitudinal movement. To facilitate resilient holding of the boot sole, without the need for additional tension springs in the toggle lever arrangement, various embodiments of the invention are disclosed including resilient longitudinal displaceability of the pivot joints between the guide members and the retaining element or between the retaining element and the sole extension.

Abstract: A one-step process for the preparation of pure aromatic dicarboxylic acid dichlorides by reacting an aromatic dicarboxylic acid or an aromatic dicarboxylic acid mixture with phosgene in the presence of a catalyst and, optionally, in a solvent or diluent, by using tertiary phosphines as catalysts, and the use of the dicarboxylic acid dichlorides obtained for the production of polycondensates.

Abstract: A single-stage process for the preparation of high purity aromatic dicarboxylic acid dichlorides by reacting an aromatic dicarboxylic acid or an aromatic dicarboxylic acid mixture with phosgene in the presence of betaines as catalysts and optionally in a solvent or diluent, and the application of the aromatic dicarboxylic acid dichlorides for making polycondensates.

Abstract: A method of and apparatus for the flotation of mineral feedstock using the method of froth flotation. The method may be employed with flotation machines having their own air suction, or with flotation machines with subaeration. Pulps pretreated with flotation agents and having a density up to twice the normal density of ore pulps are submitted to a flotation process with a pulsed air flow by means of normal air supply periods alternating with periods wherein the quantity of air ranges from 1-90% of the normal air supply. The apparatus for carrying out said method makes use of known flotation machines with rotor-stator systems, which machines are modified to provide them with an air duct incorporating an air flow regulating member connected to an appropriate control means. With the existing methods of flotation there are obtained about 400 gr/l of solids in the pulp. With the present method with pulsing air supply there can be obtained about 800 gr/l of solids in the pulp.

Abstract: There are needed galvanic baths for the deposition of silver and silver alloys which exhibit a high resistance to sulfur and contain the least possible amounts of alloyed platinum group metals and/or gold. This is attained by using a salt melt as the electrolyte which melt contains a silver salt, alkali thiocyanate and salts of at least one alloying metal. Preferably the electrolyte contains per liter of salt melt 0.1 to 40 grams of silver and 1 to 200 grams of platinum metal and/or gold.

Abstract: In a conveying arrangement for accommodating and conveying slabs, including a roller supporting chain whose chain links, at their ends, are connected by articulation pins and have projections that overlap each other, each chain link is provided with a cover plate having load supports that rise above the projections in terms of height.

Abstract: For the electrolytic deposition of gold alloys there is required a process with which low carat coatings can be deposited which nevertheless have a high resistance to tarnish. Such coatings are obtained from electrolytes which consist of a salt melt and contain gold salts, alkali thiocyanate and salts of one or more alloyings elements as constituents. Preferably the electrolyte contains per liter of salt melt 0.5 to 20 grams of gold, up to 300 grams of Cu, Zn, Sn, Cd, Ni, Ag, Pd, Ru and/or Pt, up to 200 grams of alkali cyanide and/or water.

Abstract: A cross country ski binding of the type in which a forwardly extended portion of the sole of a ski shoe is received by and fixed into a chamber fitted to the ski. In the present arrangement an over center linkage is arranged generally in front of the chamber and includes a clamp portion with a hooked end which fits over the top of the chamber and engages an abutment on the upper side of the extended sole portion so that on engaging the binding by actuation of the over center linkage the hook is pulled forwardly to secure the ski shoe within the binding. An especial feature of the arrangement is that the clamp is arranged as a resilient spring which obviates the need for resilience elsewhere in the binding. Actuating means are provided which allow the skier to open and close the binding from a standing position with a ski pole. In a modification an auxiliary spring fastened to the clamp is used to assist disengagement of the hooked end of the clamp.

Abstract: In a torque support arrangement for a gear mounted so as to be movable about a pivot axis, wherein the gear is supported against the base on both sides of the pivot axis by an elastic supporting arrangement, the supporting arrangement includes a pressure-medium piston-cylinder to which pressure gas is admitted and whose position relative to the base is adjustable by means of an adjustment device.

Abstract: Resins having a softening point of from 50.degree. to 130.degree. C., an OH-number of from 250 to 400 and an iodine number of from 90 to 160, obtainable by reacting an alkyl phenol-formaldehyde novolak or an alkyl phenol mixture-formaldehyde novolak under acid-catalysed conditions with a polunuclear phenol or polynuclear phenol mixture and formaldehyde and/or an aliphatic aldehyde or aliphatic aldehyde mixture, the ratio by weight of the alkyl phenol or alkyl phenol mixture to the polynuclear phenol or polynyclear phenol mixture being from 2.2:1 to 1:10.

Abstract: A cassette for X-ray film has two rigid sections connected to each other by a hinge which forms the central portion of an opaque plastic foil bonded to the inner sides of the sections. One of the sections has a radiation-admitting opening which extends to the hinge and is bounded by elastic sealing lips forming integral parts of the foil. The foil has a hole for evacuation of air from the interior of the container when the two sections overlap and are locked to each other. X-ray film and an intensifying screen are placed into the container within the confines of the sealing lips to extend all the way to the hinge. The container can be used for the making of mammograms to image the breasts all the way to and inclusive of the adjacent parts of the chest.

Abstract: An indicating arrangement for indicating the absence or presence of film in the interior of an X-ray film cassette includes an indicating member movably mounted on one portion of the cassette. Another portion of the cassette which is juxtaposed with the one portion has a recess therein, in which the inner end of the indicating element is received when film is absent from the internal space of the cassette, but which is covered by the film when the same is properly introduced into the internal space of the cassette so that the inner end of the indicating element is prevented from entering this recess. The position of the indicating element can be perceived at the exterior of the one portion of the cassette in a tactile or visual manner. The indicating element may be a discrete element mounted on the cassette, or a one-piece part of a flexible portion of the cassette.

Abstract: A cross country ski binding includes a support element which has a rear part clampingly engageable with a forward extension of a ski boot sole and a front part which is fixedly attachable to a ski. In order to accommodate angular movement between the front and rear parts, a latching mechanism is included which permits such angular movement about cross axes extending crosswise of the longitudinal extent of the ski when the binding is in an in-use position. The forward extension of the boot sole is formed as a short articulation part for hingedly connecting the boot to the latching mechanism. In preferred embodiments the forward boot sole extension formed as the articulation part extends less than 15 mm forwardly from the toe accommodating part of the boot, such that the boots can be comfortably walked in when not skiing.

Abstract: In a mixing arrangement including a tiltable mixer provided with a refractory lining and having a horizontally arranged cylindrical mixing chamber with end walls, the mixing chamber is mounted on a base by means of a fixed bearing and an expansion bearing and is supported on the base by means of two aligning carrying trunnions connected to the end walls, one of the carrying trunnions being mounted in the expansion bearing and the other being mounted in the fixed bearing.

Abstract: Boron containing phenol/formaldehyde resins can be isolated from their reaction media by evaporating said resins in a spiral flow evaporator which has a ratio between throughput and tube cross section from 0.1 to 1.5 and a ratio between throughput and evaporation surface from 100 to 400.

Abstract: Ski holding apparatus is disclosed which comprises a rack for supporting a plurality of skis in a substantially common plane. The rack features pairs of holders arranged across the rack with the holders of each pair spaced apart along the rack so as to support at least one ski, or preferably a pair of skis at two spaced apart locations.The holders are adapted to support the skis in inclined positions in which the mean transverse plane of the skis is arranged at angle of 30.degree. to 60.degree. to said common plane.In this way the skis on the rack require less space. The rack can either be used on vehicle roofs, in ski rooms, or in storage spaces within vehicles. Each holder is conveniently closed by a closure member to retain the skis.Various types of closure are described in which the individual closures for each holder may be either resilient or rigid and may also be supported from a common clamping arm.

Abstract: A tilting drive arrangement for a converter has a spur gear wheel fastened to a tilting trunnion of the converter and engaging with at least two pinions driven by a common motor. At least one shaft is provided for a common rotation of the pinions. The pinions are mounted in a carrying gear casing that is overmounted on the trunnion in a position outside the horizontal plane extending through the tilting axis of the converter. A torsionally elastic shaft between the pinions or a pivotally mounted reduction gear on each pinion are provided to produce a uniform torque distribution to the pinions.

Abstract: A voltage supply for an X-ray tube provides both high and low voltages to the tube. A high voltage transformer using split primary and secondary windings is employed. The high voltage is switched on and off by selectively phasing the voltage across the transformer's secondary coils. Low voltage is coupled from one of two primary windings.