Abstract: Application of a polymer-carbon composite, wherein in a matrix of electrically non-conducting thermoplastic polymer, elastomer or siloxane, a filler is dispersed in the form of carbon nanostructures used in the amount of 0.1% to 10% by wt., for selective shielding of radiation in the range of 0.1-10 THz, with efficiency exceeding 10 dB at least in a part of the mentioned sub-terahertz range, the composite obtained by a direct mixing of fluid polymer and the filler and curing being used, and the composite used being non-conducting for direct current.

Abstract: Generator of physically unclonable cryptographic keys (PUF) has two adjustable speed ring oscillators (GPRS, GPRS?), which outputs (o-GPRS, o-GPRS?) are connected to inputs (i1-DF, i2-DF) of a phase detector (DF), which output (o-DF) is connected to control inputs of the adjustable speed ring oscillators (s-GPRS, s-GPRS?) through a control system (US) and is also connected to a output (o-PUF) of the generator of physically unclonable cryptographic keys (PUF) through a sample and compare circuit (URP). Generator has a initializing input (i-UCH) connected to both initializing inputs of the adjustable speed ring oscillators (i-GPRS, GPRS?) and to the first input of the sample and compare circuit (i-URP), which second input (z-URP) is connected to the output (o-GPRS?) of one of adjustable speed ring oscillators (GPRS?).

Abstract: Random number generator (GL) comprising adjustable speed ring oscillators (GPRS, GPRS?), which have outputs (o-GPRS, o-GPRS?) connected to inputs (i1-UM, i2-UM) of a metastability circuit (UM) and inputs (i1-DF, i2-DF) of a phase detector (DF), which outputs (o-UM, o-DF) are connected to inputs (r-US?, i-US?) of a control circuit (US?), having output (o-US?) connected to control inputs (s-GPRS, s-GPRS?) of the adjustable speed ring oscillators (GPRS, GPRS?). The outputs (o-UM, o-DF) of the metastability circuit (UM) and the phase detector (DF) are being outputs (o-GL, o2-GL) of the random number generator (GL).

Abstract: Method for preparation of 5-alkylsalicylaldoximes with formula 1, where R is a C6-C16 alkyl group, consisting in that into a water-alcohol solvent system, p-alkylphenol, sodium hydroxide, chloroform and hydroxylamine are introduced, while in relation to the alkylphenol used, sodium hydroxide and chloroform are used in amounts from the stoichiometric amount to a 100% excess, and hydroxylamine is used in amounts from the stoichiometric amount to a 60% excess, and the reaction is carried out at a temperature of 60-75° C. for 1.5-4 h, and then, at a temperature of 20-30° C., the post-reaction mixture is acidified till the pH of the aqueous phase <7.0 is obtained, and next, an alcohol-water azeotrope is distilled off with an admixture of unreacted chloroform, the residue is mixed with a neutral C5-C10 hydrocarbon solvent, the layers are separated, and the solvent is distilled off from the organic phase.

Abstract: Method for purification of ammonia or mixtures of nitrogen and hydrogen, or nitrogen, hydrogen and ammonia, where ammonia or a mixture of gases under pressure of from 0.1 to 25 MPa is passed through a column packed with aluminum oxide with a large specific surface area, the ammonia or mixture of gases is then passed through a column packed with CaO, NaOH, KOH or an NaOH/KOH melt, separately or in a mixture, at 20 to 70° C. and under pressure of from 0.1 to 25 MPa, and the ammonia or mixture of gases is passed through a column packed with activated carbon having a specific area of 100-3000 m2/g with sodium, potassium, caesium, magnesium, calcium, strontium, barium or cerium nitrates(V) or nitrates(III) deposited on its surface, separately or in a mixture.

Abstract: An apparatus enabling disabled persons to walk, comprising a rigid elliptic jacket (1) abutting against and supported by wearer's pelvis, attached to the movement direction change mechanism (2), open in its rear portion and provided with a lock (4), whereas on vertical members of the rectilinear movement mechanism (3) there are mounted cylindrical shank clamps (5), each having open rear portion, and skids (7) rigidly attached to foot supporting platforms (6), constituting lowermost members of the rectilinear movement mechanism; the skids (7) resting on surface of available walkway.

Abstract: Apparatus for a dynamic classification of suspensions of solid bodies in liquids consisting of a cylindrical body with a conical bottom terminated with an outlet stub pipe, provided with a tangentially situated inlet stub pipe and a co-axially situated rotatable perforated cylindrical element covered with gauze mesh and mounted on a hollow drive shaft, wherein in the cylindrical room between the inner wall of the body and the gauze there are co-axial baffles which are not in direct contact with one another and are so spaced from one another that the inner edge of the baffle lying above is situated below the level of the inner edge of the baffle lying below and the rotating cylindrical element is connected to a thickening worm screw.

Abstract: A fire detector is provided with an electric insulator consisting of short segments of preferably a ceramic pipe disposed end-to-end within the space between an inside cylindrical electrode and cylindrical outside electrode. The inside electrode together with the insulator segments are covered with a thin salt-based layer and are disposed in the interior of the outside electrode so that between the insulator segments and the internal wall of the outside electrode an air space is formed along the length of the detector, whereby the insulator segments each provide a point-type contact between the internal wall of the outside electrode and the thin salt-based layer.

Abstract: In a method for the electrodeposition of bright tin coatings by the use of an electroplating bath comprising a solution of stannous sulfate and sulfuric acid, the improvement which comprises adding to the bath an alcoholic solution containing from 14 to 30 percent by weight of a surface active agent, from 0.5 to 5 percent by weight of an unsaturated carbonyl compound containing an aryl group, from 1.0 to 10.0 percent by weight of the product of transesterification of a natural fat, and at least one of the following ingredients: from 0 to 8 percent by weight of an ester of an unsaturated acid and from 0 to 15 percent by weight of compound containing an ether group, the said solution being added to the bath in the ratio of 1 part of solution to 20 to 35 parts by weight of the bath.

Abstract: A machine for molding pipe type elements such as steel fabric reinforced concrete pipes, provided with a funnel having protrusions on its inner surface mounted rotatably in relation to an external mold on rolling elements, a core tube being provided with preferably three guiding members arranged inside the core tube, at least one of the guiding members being filled with lubricating liquid and a seat at the lower ends of the guiding members fitted separably with a lubricating gasket, the seat consisting of at least two parts arranged symmetrically about a cylinder whereby the inner opening of the seat is fitted slidably to the outer diameter of the cylinder with the guiding members guided slidably in the openings of a guide forming the tip of the cylinder.

Abstract: Method for production of new, thermal and chemical resistant polyurethane plastics, particularly in the form of foams, these foams being obtained from the reaction of di- or poly- isocyanates with polyols, said polyols having the formula 1 or 2 as herein described, Ar in the said formulas representing a benzene, naphthalene or anthracene ring, which may be singly or multiply substituted with a halogen atom, alkyl radical, aryl radical or allyl radical, Z representing the oxygen atom, a group SO.sub.2 or a divalent radical --CRR.sub.1 -- where R and R.sub.1 represent a hydrogen atom or an alkyl radical, m and r represent 0 or 1, and n and p represent an integer 1-10, or their mixtures with other low-viscosity polyols or with a compound having formula 3 as herein described in which R.sub.2 represents a simple or branched alkyl or aryl radical which can be substituted by a lower alkyl or aryl radical or by halogen atoms added in a quantity of 0.

Abstract: Composition for production of cores and casting molds comprises 100 parts by weight of grain base, particularly quartz sand, 0.5 - 30 parts of alkal metal hydroxides, 1 - 40 parts of alkali metal carbonates, 1 - 15 parts of water as well as 0.2 - 10 of known hydrophilic binders. The composition according to the invention is removed from the cast or mold by subjecting the core in the cast or mold to the action of solvent, particularly water, preferably by dipping.

Abstract: The invention relates to a method of obtaining mechanical periodic oscillations shocks, used particularly in vibrators for compaction of concrete mixes and other materials.A method according to the invention consisting in setting into rotary motion of at least two eccenters is characterized in that the eccenters are set into rotary motion with various speeds and phase displacements so that the sum of centrifugal forces in the set-up direction provides periodical oscillating motion in whose each period at least once all centrifugal forces of revolving eccenters, or the plurality of centrifugal forces coincide simultaneously with the set-up sense and operation direction, or directions parallel to each other.

Abstract: Link mechanism of a mechanical transducer, especially of a toothed amplifying gauge, consisting of an input member performing a rectilinear motion and contacting in a point with one arm of a double-arm lever, the other arm of which remains in point contact with an output lever, characterized in a preferred example in that the mechanism is equipped with a non-linearity compensator of the transmission in the form of an intermediate member, preferably a shaft rigidly mounted on the rotating arm and arranged between a working surface of the double-arm lever and the working surface of the output lever. The arm of the compensator preferably has an arcuate opening through which the axle of the output lever passes, the latter having an arcuate opening through which the axle of the compensator passes. The latter is preferably positioned parallel and in the same plane as the axes of rotation of the double-armed lever and the output lever.

Abstract: A device for shaping the outer surface of a workpiece in which a sleeve is resiliently deformable in a radial direction. The sleeve is placed coaxially within a flywheel and removably fastened in a body member. A ring-shaped tool is coaxially located within the sleeve. The tool has at least five forming segments uniformly disposed on the circumference of the tool. The segments are integrally connected to one another by means of a neck portions which extend on at least one of the two axial sides of the tool. The tool is rotationally mounted in the body by means of an adjustment bushing. At least two rolls are located between the outer surfaces of the sleeve and the inner surface of the flywheel such that the rolls press the sleeve against the forming segments of the tool to deform the segments radially inwardly. The rolls are mounted in a cage which fixes their mutual angular positions.

Abstract: An arrangement for registering and reading message units for calls in a telephone or Telex exchange to allow automatic billing for calls and presenting the bills to the subscribers of the exchanges. Electrochemical integrators are connected so that one of their electrodes is connected to ground potential, whereas the other electrodes of these integrators are connected over resistors to wires conducting metering pulses to individual equipments of exchange lines. The latter electrodes during the reading process become connected over a commutator to a reading device having threshold means detecting the increase of voltage on terminals of the integrator. A generator provides square pulses having their polarization opposite to that of the metering pulses. The output of the generator is connected to a gate having its other input connected to the threshold means. The output of the gate is connected to the input of the pulse counter.