Abstract: The present invention relates to an electrophotographic recording material consisting of an electroconductive support material with a photoconductive double layer of organic materials which consists of a homogeneous, opaque, charge carrier producing dyestuff layer and of a transparent top layer of insulating materials containing at least one charge transporting compound, which is characterized in that the organic dyestuff layer consists of a compound of the general formula ##EQU1## wherein --A-- is a diphenyl or azobenzene group which may be substituted by alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 4 carbon atoms, and/or halogen,R and R.sub.1, which may be the same or different, are alkyl with 1 to 4 carbon atoms or carbalkoxyl, in which the alkyl groups have from 1 to 4 carbon atoms, andR.sub.2 and R.sub.3 are phenyl groups which may be substituted by alkyl with 1 to 4 carbon atoms.

Abstract: A method of making a unitary structure, such as, a conveyor idler, having a heat-sensitive subassembly with at least one moving part therein, such as, a lifetime lubricated bearing structure, wherein the subassembly is preassembled, the preassembled subassembly is placed in a mold, and a plastic, having a sufficiently low temperature of formation to prevent damage to the heat-sensitive subassembly and, upon hardening, a sufficient compressive strength to hold the subassembly together and form a pressure resistant unitary body, such as, a hard polyurethane foam having a compressive strength of at least about 90 kp/mm.sup.2, is formed about the subassembly. A protective covering, such as, a plastic sleeve, resistant to abrasion, can also be placed in the mold and made to adhere to and surround the outside surface of the unitary plastic body during the formation of the unitary plastic body.

Abstract: This invention relates to an electrophotographic developer liquid comprising a dispersion of a colored, viscous solution of polymers containing about 0.01 to 10 per cent by weight of water, calculated on the weight of polymers present, in an electrically insulating carrier liquid having a kauri-butanol value of less than about 30 and in which at least one of the polymers is sparingly soluble. The invention also relates to a process for the preparation of the novel electrophotographic developer liquid.

Abstract: This invention relates to an improvement in the process for reconditioning worn frogs of railway switches by severing the frog together with sections of the regulating rails adjacent thereto, reconditioning the frog, and renewed welding-in of the frog block, the improvement comprising severing the worn frog from the junction regulating rails at connecting welds thereof, reconditioning the frog, and welding two new regulating rails onto the reconditioned frog, with compensation for the loss in length, due to the severing operation, simultaneously in one casting by aluminothermic welding.

Abstract: A motor or processing machine, such as a lowspeed radial piston motor, having a piston with a socket formed therein operatively contacting a ball formed on one end of a piston rod, to form a ball-and-socket joint with articulated movement, and a shoe on the other end of the piston rod, adapted to glide on a rotating element of the machine, such as a crankshaft eccentric, in which the entire piston rod is formed from a bronze-base bearing metal, such as steel bronze. At least the shoe of the piston rod may be coated with a thin, soft run-in layer, such as tin, and a pocket may be formed in the shoe of the piston rod to provide hydrostatic relief.

Abstract: This invention relates to an electrophotographic recording material consisting of an electroconductive support material and a photoconductive double layer of organic materials which consists of a homogeneous, opaque, charge carrier producing dyestuff layer and of a transparent top layer of insulating materials with at least one charge transporting compound as well as to the process for its manufacture.

Abstract: This invention relates to an electrophotographic recording material comprising a conductive support, an organic substance capable of transporting electrical charge, and a dyestuff of purple to violet color, having: (a) an X value in the range of from 0.13 to 0.52 and a Y value within the range of from 0.019 to 0.33 in the CIE system, (b) an extended .pi.-electron system of at least 20 .pi.-electrons, and (c) possessing a reflectance of not more than 50% throughout the spectral region of 420 to 750 nm when in the form of a single color-masking layer of about 0.1 g/m.sup.2, and which has a high photosensitivity throughout the said spectral range. The invention also relates to a process for the preparation of the novel recording material.

Abstract: This invention relates to a unilaterally closed cylindrical hollow stick of shirred tubular casing having a closure within the stick bore in the zone of the stick beginning and formed from the casing end itself, said closure being composed of a U-shaped body of longitudinally shirred tubular casing. The invention also relates to a process for the production of the closure.

Abstract: A heart stimulator adapted to be used outside the body comprising pressure wave generating means and coupling means adapted to be placed on the surface of the body in the area of the heart without an air gap.

Abstract: This invention relates to a photo-crosslinkable polymer comprising units with side chains having 2-pyrone groups therein. The invention also relates to processes for the preparation of the novel photo-crosslinkable polymers and to a photo-curable copying composition including the photo-crosslinkable polymer.

Abstract: This invention relates to an improvement in an aircraft having a tail-mounted, shrouded pusher-type propeller and an engine mounted in front of the shroud, the improvement comprising exhaust pipe running from the engine to the shroud.

Abstract: This invention relates to an improvement in a light-sensitive copying layer containing an ester or an amide of an o-naphthoquinone diazide sulfonic acid or carboxylic acid together with an organic dyestuff and which changes its color shade upon exposure to light, the improvement comprising that it contains, calculated on its total content of o-naphthoquinone diazide compounds, 10 to 75 per cent by weight of a halide of o-naphthoquinone diazide-4-sulfonic acid and, as the dyestuff, an organic compound capable of salt formation in a quantity of 1 to 50 per cent by weight, calculated on the same basis.

Abstract: An apparatus for producing a gaseous developer medium for diazo-type material having a distillation column through which fluid developer solution and vapor pass counter-currently. An outlet on the distillation column is connected to a developing chamber. An inlet on the distillation column serves for feeding developer solution therein. The apparatus further includes a vapor generator connected to the distillation column by a direct conduit.

Abstract: This invention relates to an improvement in a rotary piston machine of trochoidal construction for transporting a fluid medium, having working chambers formed between a trochoidal piston and a housing corresponding to the coordinated outer envelope curve, said chambers being separated from each other by radial seals in the housing, wherein the medium is supplied through openings within the inner envelope curve in the housing side wall and in a recess in the piston and passes from the recess by way of control openings in the peripheral piston surface to the working chamber, and having outlet openings in the housing closed-off by check valves, the improvement comprisingA. the piston has the form of a saddle-free epitrochoid 1:1,B. the supply openings in the housing side wall are in the area of the radial seals,C.

Abstract: This invention relates to an improvement in the process for the production of a copper coating on a shaped plastic support in which copper is vapor-deposited in a high vacuum on the surface of the plastic support, the improvement comprising coating said surface, prior to the vapor-deposition of copper, with a layer of a conducting substance in a quantity such that the surface resistance is in the range of about 1 to less than 10.sup.12 ohm.

Abstract: This invention relates to a process for manufacturing an axially symmetrical rotor adapted to rotate about the vertical axis thereof and having a length greater than the diameter thereof which comprises rolling a thin, high-strength steel sheet to form a cylinder having a longitudinally-extending joint,Welding said joint by electron beam welding,Solution-treating the blank thus formed,And bringing the blank to its final dimensions by means of the three-roll press rolling process wherein the blank mounted on a rotating pressure mandrel having a stop is pressed by pressure rollers moving toward the stop while the material of the blank flows counter-currently with respect thereto.

Abstract: This invention relates to an improvement in the process for the production of water-adsorbing, but largely water-insoluble, cellulose ethers, in which cellulose is alkalized in the presence of alkali and isopropanol as a reaction medium and is so reacted with an etherification agent that by etherification only a water-soluble cellulose ether is produced, and in which process a modification agent which is able to react with the still free hydroxyl groups of the cellulose anhydro glucose groups in an alkaline reaction medium is reacted before, during, or after the etherification, the improvement comprising effecting the etherification of cellulose to carboxymethyl cellulose, carboxymethyl hydroxyethyl cellulose, hydroxyethyl cellulose, or methylhydroxyethyl cellulose, reacting with the modification agent in the presence of 0.8 to 7.5 parts by weight of isopropanol, based upon the cellulose weight, and employing a modification agent being one of the formulae ##EQU1## R.sub.

Abstract: This invention relates to a fiber fleece based on synthetic fibers and containing a polymeric organic reinforcing material, and having, at a proportion of polymeric elastic reinforcing material of at least 10 per cent by weight and not more than 80 per cent by weight, calculated on the total weight of a base fleece having a density between 0.1 and 0.28 g/cm.sup.3, a tensile strength of at least 0.01 kg/mm.sup.2, a tear propagation resistance of at least 7 kg/mm (according to IUP 8), and a tensile stress or not more than 0.03 kg/mm.sup.2, measured in a tensile elongation test at an elongation of 10 per cent.

Abstract: A lithographic printing plate structure and method of manufacture, in which a support sheet of steel, normally subject to corrosion in a lithographic environment, such as a mild steel, is coated, preferably on both sides, with aluminum, zinc or an aluminum-zinc alloy to a thickness of about 1 to 3 mils, a polyvinyl phosphonic acid is disposed on the metal coating and a negative working diazo photo-sensitive layer is applied over the polyvinyl phosphonic acid coating.

Abstract: This invention relates to a process for preparing carbonated hydrated zirconium oxide which comprises dispersing zirconium oxychloride in an inert, non-polar solvent and reacting it, without the addition of water, with an at least equimolar quantity of ammonium carbonate or potassium carbonate, and separating the reaction product.