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

Abstract: The present invention relates to a method for producing prepolymers based on vinyl monomers such as methacrylic acid esters, or a mixture of esters of methacrylic and acrylic acids, or styrene, or a mixture of styrene with methacrylic acid esters. The method consists in conducting mass polymerization of said vinyl monomers at a temperature of 90.degree. to 160.degree. C. in air, or in oxygen-enriched air, or in an inert gas medium in the presence of an initiating system. The system is made of a mixture consisting of:(1) peresters of the general formula ##STR1## where R is aryl, alkyl, isoalkyl, methyl carbitol, phenyl carbitol or benzyl carbitol in an amount of 0.05-0.3 wt. parts per 100 wt. parts of a vinyl monomer and(2) the following components:(a) sulfur-containing organic acids with bivalent sulfur in an amount of 0.2-3.0 wt. parts per 100 wt. parts of a vinyl monomer, or(b) esters of sulfur-containing organic acids with bivalent sulfur in an amount of 0.2-3.0 wt. parts per 100 wt.

Abstract: A super-conductive cryogen-cooled electrical machine comprises a rotor disposed within a hollow stator with an annular gap which is evacuated and kept under vacuum by means of at least two shells furnished with ports and position concentrically with a clearance or gap therebetween. One of said shells is supported in a cantilevered fashion by the rotor on the end face thereof to be coaxial therewith and the other being supported in a cantilevered fashion by the stator on the end face thereof opposite said end face of the rotor. The ports in the rotor-supported shells are made so that their axes form an acute angle .alpha. with tangent lines drawn to the shell periphery from the points where the port axes intersect the shell envelope in the direction of the rotor rotation, while the ports in the stator supported shells are made so as to form, in a similar way, an angle .beta.=180.degree.-.alpha..

Abstract: Electrodynamic separation of nonmagnetic free-flowing materials is accomplished by feeding the flow of a material into a region of maximum intensity of a variable nonuniform magnetic field for inducing maximum eddy currents in electrically conducting particles of the material being separated and producing maximum electromagnetic forces which deflect the electrically conducting particles from the direction of feed of the material being separated.The variable nonuniform magnetic field is generated by an electromagnet having a closed magnetic core with a magnetic air gap defined by pole pieces. The electromagnet pole pieces are symmetrically divergent from the pole axes in a plane substantially perpendicular to the direction of feed of the material being separated.

Abstract: A nonrotatable telescoping supporting structure particularly suited for a pole lamp supporting means including an outer elongated tubular member of substantially cylindrical shape, an inner elongated member having at least one portion of reduced radial size with respect to the longitudinal central axis of the inner member. The reduced portion extends substantially along the entire length of the inner member and there is additionally provided a protuberance located along the inner surface of the outer member, which protuberance extends inwardly. Portions of the inner member in juxtaposition to the reduced radial portion move into engagement with the protuberance to prevent relative rotation between the members.

Abstract: An installation for electrohydroblasting of castings comprises a base, a bath placed on said base, a mechanism for feeding castings into the bath, an electrode, and a mechanism for introducting the electrode into the bath and a pulse current generator coupled electrically to the electrode. An insulated casing is mounted on the base over the bath. The insulated casing is built of a latticed framework whose openings are covered with slabs, each being formed with two metallic boxes, one inside the other, so that the ends of one box face a bottom of the other, box with a space formed between the bottoms, intended for a vibration-absorbing material to be fed thereto and with the metallic boxes being grounded.

Abstract: A stator bar winding of a slotless-core electrical machine comprises conductors enclosed in an insulating sheath with the conductors arranged in three concentric layers. Conductors of the inner layer are placed underneath every second conductor of the middle layer, whereas the conductors of the outer layer are placed over every other conductor of the middle layer. The conductors of the middle layer are bent in their overhang portions from the axial direction to the angle (90.degree.-.alpha..sub.1) which is twice as small as the angle 90.degree.-.alpha..sub.2) to which the overhang portions of two other layers are bent. The conductors of the middle layer are also electrically connected in series and alternately to respective conductors of the outer layer or inner layer.

Abstract: What is proposed is a method of assembling nonmagnetic current-conducting components into units along an axis of assembly. The assembly is arranged under the effect of electrodynamic forces formed by the interaction of a primary alternating magnetic field directed along the axis of assembly and a secondary magnetic field. The components to be assembled are placed in the primary magnetic field so that the areas covered by the contours of the currents induced in these components by the magnetic field are located in planes approximately perpendicular to the axis of assembly; and in each adjacent pair of components to be assembled the regions covered by the contours of the induced currents at least partially overlap each other.

Abstract: A super-conductive, cryogenically-cooled electrical machine comprises a superconductive exciting winding located in a hollow rotor and a system for cooling the ends of the rotor shaft. The cooling agent is delivered from one end of said shaft to the rotor space through the axial passage of the shaft whose ends are made of at least two coaxial tubes secured together by threading. The cooling agent is removed through the clearances of said thread and such construction of the rotor shaft reduces heat influxes to the superconductive exciting winding at least threefold and lowers the weight-to-power ratio of the machine at least fivefold.

Abstract: The present invention relates to equipment designed for carrying out heat- and mass transfer processes between gas or vapor and liquid and deals with centrifugal-whirling contact trays installed in rectification, absorption, washing and contact vertical columns in which liquid moves in a downward direction and contacts gas or vapor rising upwards along the column, the liquid phase containing the solid phase or polymerization products.

Abstract: The disclosed arrangement for supporting stator end windings of an electric machine comprises a rigid inner ring and an outer ring, said rings being made of electrically insulating material. The inner ring is mounted coaxially with the inner bore of the stator core and supports the end portions of a stator bar winding, and the outer ring externally embraces these end portions. Both rings are mounted and secured together along the head portions of the end windings. The inner ring is attached to Z-shaped members arranged adjacent to the end portions and preventing the inner ring from axial displacement relative to the end portions. This is achieved due to the fact that a projection of each Z-shaped member, facing the end surface of the core, is positioned between winding bars at their outlet from core slots, said projection being rigidly connected with one of the brackets movably associated with a clamping plate of the core and attached to the outer ring.

Abstract: This invention provides a pressure transmitting and sealing apparatus between a high or low pressure fluid line and a gauge monitoring the pressure of the fluid in the line. This apparatus transmits pressure fluctuations between the measured fluid and a dissimilar fluid in the standing line connected to the measuring gauge. The invention is particularly applicable in instances where the ambient temperature is below the freezing point of the measured fluid and a non-freezing fluid is required in the standing line and gauge. The apparatus comprises an in-line piston and cylinder unit which transmits variations in the pressure in the measured line to the fluid in the standing line to the gauge, while maintaining separation of the two fluids and at the same time allowing the non-freezing fluid in the standing line to lubricate the piston and cylinder. In the event of a break in the standing line, the piston will prevent leakage from the measured fluid line.

Abstract: A method for preparing .alpha.-naphthol according to the present invention comprises sulphonation of naphthalene with an equimolar amount of a concentrated sulphuric acid at a temperature ranging from 30.degree. to 85.degree. C. for a period of from 60 to 120 minutes in the presence of acetic anhydride whereafter .alpha.in an amount of from 0.5 to 1.5 mole per mole of naphthalene. The resulting naphthalene-.alpha.-sulphonic acid is fused with an alkali taken in an amount of 3-4 moles per mole of naphthalene-.alpha.-sulphonic acid at a temperature ranging from 180.degree. to 285.degree. C. for a period of from 10 to 30 minutes. The resulting melt consisting of the alkali metal .alpha.-naphtholate and the alkali metal sulphite is mixed with a polar solvent; the resulting mixture is acidified with a mineral acid taken in an amount equimolar relative to the alkali metal .alpha.-naphtholate, whereafter.alpha.-naphthol is separated from the resulting suspension.

Abstract: According to the invention, the stator of an electrical machine comprises a slotted core and a multilayer bar winding partially received in the core slots and partially accommodated in the air gap of the electrical machine. Interposed between the bars of the multilayer bar winding are spacers whose slots accommodate brace members enveloping each of the bars of the multilayer bar winding on its opposite sides. Each of the brace members is attched to two rollers, one of which is secured in a spring clip received in an axial slot of the stator core, and the other of which is accommodated in a threaded pin received, in turn, in a hole provided in an insulating wedge member. The invention improves the maintainability of the electrical machine, making it as easy to maintain as any conventional slotted machine. The invention also improves the space factor of the electrical machine's air gap and accounts for a better fastening of the multilayer bar winding of the machine's stator.

Abstract: A process for preparing a film-forming composition comprising co-oligomerization of arylalkenes with conjugated dienes at a weight ratio therebetween of from 1:1 to 4:1 respectively, at a temperature within the range of between 60.degree. and 140.degree. C. in a medium of a hydrocarbon solvent in the presence of a co-oligomerization initiator, that is an organic peroxide or an organic hydroperoxide, and a molecular weight control agent. The hydrocarbon solvent is a petroleum fraction boiling within the range of from 160.degree. to 220.degree. C., or a hydrogenate of said petroleum fraction or naphthenic hydrocarbon. The molecular weight control agent is made of products of diene condensation of conjugated dienes with cyclodienes, or a dehydrogenate of said products of diene condensation, or a fraction with a boiling range of from 160.degree. to 220.degree. C. recovered from liquid products gasoline pyrolysis. The process is technologically simple; non-toxic hydrocarbon solvents are used therein.

Abstract: A heavy-duty precision wire-wound alternating-current resistor comprises a capsule filled with a liquid dielectric formed of a low-viscosity liquid perfluorinated organic compound. Within the capsule of the resistor there is arranged a sectionalized bobbin made from a dielectric material chemically resistant to the liquid perfluorinated organic compound. The sectionalized bobbin carries a resistance element with a clearance therebetween dimensioned so as to exceed by at least an order of magnitude the change in the bobbin diameter due to the magnitude of thermal expansion of the material of the sectionalized bobbin in order to provide the circulation of the liquid dielectric therein.

Abstract: The invention is applicable to the griding with current-conducting abrasive tools of works of current-conducting churlish materials, such as hard, magnetic and refractory alloys, and to cutter sharpening.The method according to the invention consists in applying voltage pulses to a tool and a work placed in a liquid medium with a conductance of 10.sup.-4 to 2.multidot.10.sup.-2 ohm.sup.-1 .multidot.cm.sup.-1.The process of grinding the work and electric-erosion cleaning the tool is carried out at a pulse duration of 0.5 to 10 msec, pulse repetition frequency of 10 to 500 Hz, and amplitudie of pulses ranging from a minimum of 3 V to a maximum which is below a level required for a breakdown of the liquid medium between the tool and the work.Alternatively, simultaneously with machining the work the electric-erosion truing of the tool is performed with the use of a tool truing electrode.The tool truing electrode and the work are connected to the same pole of a power source.

Abstract: A method of stereoscopic color television, in which six independent signals of color-separated images carrying color information on the green, red and blue components (G.sub.1, R.sub.1, B.sub.1) of a first frame of a stereo pair and carrying color information on the green, red and blue components (G.sub.2, R.sub.2, B.sub.2) of a second frame of a stereo pair are separated at the sending end. The signals of color-separated images carrying color information on the green, red and blue components (G.sub.1, R.sub.1, B.sub.1) of the first frame of the stereo pair are converted, by means of matrixing, into a composite signal consisting of a signal carrying information on the green component (G.sub.1), a color signal carrying limited information on the magenta, red and blue colors a selective color signal carrying limited information on the green color. The signals of color-separated images carrying color information on the green, red and blue components (G.sub.2, R.sub.2, B.sub.

Abstract: A rotor of an electrical machine has a superconducting winding which is connected to a heat exchanger in the cavity of the rotor. The heat exchanger feeds coolant to and withdraws coolant from the rotor. A thermal/electromagnetic shield, radially spaced from the superconducting winding, is connected with a Ranque vortex tube disposed in the cavity of the rotor. The rotor also has power leads having cooling ducts connected to the Ranque vortex tube and to the coolant discharge line. In addition, the rotor has two reducer portions adjacent the superconducting winding, arranged in series along the axis of the rotor on either side of the superconducting winding and each having a cooling duct located in close proximity to the superconducting winding and connected to Ranque vortex tube. The outlets of the cooling ducts of the reducer portions are connected with the coolant discharge line.

Abstract: A dry film photosensitive resist, according to the invention, is a flexible laminated structure consisting of three layers of which the first is a transparent polymer film transmitting UV radiation and having a thickness of 5-100.mu.; the second of said layers being a light-sensitive layer having a thickness of 5-1,000.mu. and comprising a combination of a carboxyl-containing polymer-thickener, a polar oligomer, and a monomeric substance having a boiling point above 200.degree. C. at 760 mm Hg; the third of the layers being a film from a polymeric substance having a thickness of 5-100.mu., the last-mentioned layer being a protective layer for the light sensitive layer and being disposed thereon. All the three layers are adhesively bonded together. The light-sensitive layer contains as the carboxyl-containing polymer thickener, a water insoluble copolymer of a monomer or a mixture of monomers having a neutral reaction with the carboxyl-containing monomer.