Abstract: The proposed process for carbonitriding steel and cast iron articles comprises the saturation of these articles with carbon and nitrogen at a temperature of 550.degree. to 650.degree. C. in a carbonitriding medium of vaporous ammonium carbamate.The invention finds extensive application to aircraft manufacturing, automotive industry, machine-tool manufacture and precision mechanics for surface hardening of steel and cast iron articles.

Abstract: An automatic shipboard collision avoidance system comprises radar; a situation indicator connected to the radar receiver; a computer, which extracts target echoes from clutter and determines the coordinates and motion parameters of targets; an interface through which the computer is connected to the situation indicator; a target tracking gate unit connected via the interface to the computer and having a count pulse generator, a current range counter, range comparison circuits, a gate generator and a signal-half gate generator; a video signal encoder connected to the radar and, via said interface, to said computer and having a threshold circuit, a quantizer, a selector and a buffer storage. A control signal unit generates control signals to control the gain of the radar and sign characters of the count pulses and is connected through the interface to the computer. Usually, noise would be a problem in rough seas or in the presence of intense hydrometeors.

Abstract: A flange-screw connection between a rod and a junction means having corresponding support surfaces, characterized in that a flange is secured to a connecting part provided at the end of the rod, the connecting part being of such cross section as to have the same (area) moment of inertia as the rod. The flange comprises bores adapted to receive fastening screws therethrough, the bores being disposed near the outer periphery of the flange and each terminating in an insertion cavity for receiving the fastening screws.

Abstract: An electric generator includes a rotor, a stator, a frame, a core with radial channels, and a winding, the space between the frame and the external surface of the core being divided by radial partitions into an even number of sections communicating with one another in pairs. The first section in each pair communicates along the gas flow path with the gas coolers located in the frame in close proximity to the core faces and arranged to admit the gas flow into the radial channels of the core while the second section in each pair communicates along the gas flow path with the inlet depression zone of the fans installed on the rotor faces and is arranged to discharge the gas flow from the radial channels of the core to the fans whose pressure zone communicates along the gas flow path with the gas cooler inlet.

Abstract: Apparatus for hitching mobile equipment, such as a towing vehicle and a towed vehicle, comprising a U-shaped locking member slidably mounted for lateral movement on the rearwardly extending draw bar of the towing vehicle. The draw bar is provided with a rearwardly opening slot that is adapted to receive therein a pin on the forward portion of the tongue connected to the vehicle to be towed. The rear leg of the U-shaped locking member is movable across the rearwardly opening slot in the draw bar to lock the tongue pin therein. The U-shaped locking member is biased to the closed or locking position by a spring, and a manually operable locking pin is movably mounted on the draw bar to releasably lock the U-shaped locking member in an open or a closed position.

Abstract: A method of preparing benzene and xylenes from catalysates of reforming of gasoline fractions comprising a mixture of aromatic C.sub.6 -C.sub.10 hydrocarbons and non-aromatic hydrocarbons which involves separation of a low-boiling fraction boiling out at a temperature of 90.degree.-108.degree. C. from a reforming catalysate by rectification. The remaining high-boiling fraction is processed in the presence of a hydrogen-containing gas at a temperature within the range of from 450.degree. to 600.degree. C. under a pressure of from 10 to 60 atm on a catalyst. The catalyst consists of 1 to 85% by weight of H-mordenite, 0.1 to 10% by weight of a hydrogenating component as which use might be made of oxides of metals of Group VI of the periodic system, sulphides of these metals, metals of Group VIII of the periodic system, sulphides thereof; the balance being a binder.

Abstract: The process according to the present invention comprises reacting diphenylchlorophosphine with ethylene oxide in a medium of an inert organic solvent. The resulting reaction mixture is heated in the presence of an alkyl ester of a haloacetic acid until the formation of an alkyl ester of diphenylphosphinylacetic acid. The latter, without separation and any additional purification, is reacted with hydrazine hydrate. The advantage of the process according to the present invention resides in a simplified technology, preparation of the desired product in a single stage at a high yield and the use of readily available commercially produced reagents.

Abstract: A wall protector includes a retainer member adapted to be connected to a wall surface to be protected, a pair of spaced locking portions generally project outwardly from a wall portion of the retainer member. A resilient member configurated to substantially cover the retaining member when mounted thereon is provided which has a pair of spaced engaging portions projecting towards the retainer member and adapted to snappingly engage the locking portions and maintain the retainer and resilient members spaced from each other at a predetermined distance. Application of inward pressures on the resilient member towards the retainer member causes the resilient member to at least partially deform and cause the locking and engaging portions to separate from each other along the direction of the wall portions while still maintaining locking engagement therebetween and the wall protector members.

Abstract: An ink formulation which may be coated on a flexible substratum to produce a typewriter ribbon or the like, wherein the impression made from such a ribbon is capable of adhesive removal shortly after being created on all conventional typing papers, but which impression exhibits delayed alteration resistance whereby any attempt at correcting or removing the indicia by pressure sensitive adhesive means or, altering the indicia by erasing and the like, will leave an obvious and permanent indication that a removal was attempted.

Abstract: An integrated injection logic circuit comprises a switching element using a unipolar FET whose gates are connected to the collectors of a load transistor. The emitter of the load transistor is connected to a power supply and the base area is combined with the source of the unipolar FET and grounded. Connected to the gates of the unipolar FET and to the base area of the load transistor are double-pole gating elements. The number of such elements is equal to the number of gates of the unipolar FET. The conduction voltage of the gating elements is lower than that across the p-n junctions of the respective gates of the unipolar FET.

Abstract: A continuous casting apparatus comprises a mold and a tundish connected to each other by means of a refractory conduit capable of withstanding several cycles of casting operations. Used on the continuous-casting apparatus is a dummy bar assembly whose head is bevelled on both sides thereof adjoining the mold wall. The bevelled portions of the dummy-bar head and the mold wall define a gap expanding in the direction of the withdrawal of the ingot. A sealing material, such as asbestos string, is placed in the gap and tamped therein by a special means.

Abstract: A method of dividing direct current among parallel circuits, whereby the direct current in each parallel circuit is converted into an alternating current at equipotential sections of each parallel circuit, a compensating voltage equal to half the difference between the voltage drops across two neighboring parallel circuits under steady-state conditions and at equality of the direct current therein is produced at each equipotential section, and the compensating voltage is introduced into each parallel circuit in opposition to or in accordance with the circuit e.m.f. The device contains current-equalizing units equal in number to the number of parallel circuits, each having a bridge circuit made up four controlled switches; and capacitors coupled to the points of connection of the controlled switches so as to close the circuit.

Abstract: A medicinal preparation with an antiinflammatory, analgesic and antipyretic effect, comprising 2,2,2-trichloro-1-(2-thiazolyl amino)-ethanol as the active principle, which has the following formula: ##STR1## and an appropriate pharmaceutical carrier. The preparation is used for the treatment of various diseases, for example: rheumatism in the active phase, rheumatoid, infectious allergic and metabolic arthritis, spondyloses and arthroses, lumbosacral radiculitis, and others.

Abstract: The proposed method for checking the state of the lining of a melting unit consists of measuring the electric parameters of equal portions of the lining, located along the perimeter of the melting unit. This is followed by determining the arithmetic mean and the maximum value of these parameters and comparing the two. The result of the comparison is indicative of the state of the lining. According to the invention, the device for checking the state of the lining comprises electrodes which are uniformly installed on the lining along the perimeter of the melting unit. The electrodes are connected to the inputs of an information unit, which provides information about the state of the lining, as well as to the inputs of a maximum value unit for determining the maximum value of a parameter being measured. One output of the maximum value unit is connected to the first input of a comparison unit for comparing the maximum value and the arithmetic mean of the parameter being measured.

Abstract: An electric woven switching matrix comprises an insulating field fabric made by interweaving insulating fibers, conducting wires interwoven into the insulating field fabric, and sections for installation of circuit elements over the matrix area. The conducting wires, passing through these sections and intended for forming, by cutting, matrix contact terminals to be electrically connected with the lead-outs of the circuit elements installed on the matrix, extend out from the insulating field fabric, extend over the surface of a respective section and extend back into the insulating field fabric. Exit points from the insulating field fabric and entrance points into the insulating field fabric for odd sets of conducting wires are staggered with respect to exit points from the insulating field fabric and entrance points into the insulating field fabric for even sets of conducting wires.

Abstract: A process for the removal of hydrogen fluoride and/or hydrogen chloride from gases comprising passing the gas to be purified through anion-exchange sorbent composed of a textured chemisorption fiber based on carbo-chain polymers with vinylpyridine groups or aliphatic amino groups. On exhaustion the sorbent is regenerated with water.The process of the present invention makes it possible to purify gases substantially completely irrespective of the initial concentrations of impurities in the gas being treated and ensures practically unlimited number of sorption-regeneration cycles with the same sorbent.

Abstract: A signal lamp comprises a housing defining two openings of corresponding overall shape and size, and an electrical light source mounted in the housing to provide a light beam which leaves the housing by way of one of the openings. The lamp also comprises translucent members, each of which corresponds in overall shape and size to the shape and size of each of the two openings, and retaining nibs for retaining any one of the translucent members in the first opening, so that the light beam passes through that translucent member when leaving the housing, and for retaining any one at least of the translucent members in the second opening. At least one of the translucent members includes a color filter so that when that translucent member is fitted in the first opening the color of the light beam is modulated by the color filter.

Abstract: A continuous or semi-continuous metal casting method comprising the feeding of a liquid metal upon a bottom plate arranged inside an orifice of an annular inductor and the shaping of molten metal into an ingot by the electromagnetic field of said inductor. The bottom plate with the metal is then lowered, and a cooling medium is supplied upon the lateral face of the ingot in several cooling tiers arranged at various levels longitudinally of the ingot. As the bottom of the ingot comes level with a next adjacent coolant tier along the motion of the ingot cooling tier, the cooling tiers, beginning from the topmost one, are cut out or off one after the other, and until the casting ends, the cooling medium is supplied upon the lateral face of the ingot by the cooling tier that maintains the solidification front substantially at the mid-height of the inductor.

Abstract: The arrangement is mainly designed for transporting solid minerals from the floor of the ocean to a support vessel. The arrangement comprises an endless flexible carrier which is made of interconnected container sections. Each section has two chambers -- a load chamber and a float chamber. The arrangement also has means for batched loading of the chambers with solid mineral and compressed gas. During operation of the arrangement, the load chambers are loaded with solid mineral and the float chambers are filled with gas so that the loaded sections of the carrier acquire a positive buoyancy thus enabling displacement of the entire carrier.

Abstract: A process for preparing alkylbenzenes, which comprises alkylation of benzene or alkylderivatives thereof with olefines in the presence of a catalyst comprising a product prepared by reacting metallic aluminum with a chlorinated hydrocarbon in a medium of benzene or an alkylbenzene at a weight ratio between metallic aluminum and said chlorinated hydrocarbon ranging from 1:0.08 to 1:17 respectively; said alkylation being conducted at a temperature within the range of from 50.degree. to 180.degree. C. under a pressure within the range of from 2 to 20 atm. The catalyst employed in the process according to the present invention is non-hygroscopic; it is prepared by rather simple technology; said catalyst ensures a high yield of the desired products (up to 80-96% as calculated for the reacted olefine) while retaining a high quality thereof (for example, purity degree of ethylbenzene prepared thereon is 99.9179% by weight).