Abstract: The present invention relates to compounds which are derivatives of 1,4-dihydropyridine-3-carbothiol acids of the formula: ##STR1## wherein R is hydrogen, an alkyl, aryl, heteryl;R' is a lower alkyl, aralkyl;R" is an alkoxy, alkylthio, aralkylthio;R"' is methyl;R'"+R" is phenylene (ortho-).The compounds of the present invention reveal a coronarodilating activity, and are useful in medicine.

Abstract: An apparatus for recovering the meat of small crustaceans comprises a loading mechanism, a mechanism for destroying the shell and separating it from the meat, including a receiving bell-mouth, a plain-wall curving duct with a rectilinear portion and a connection for feeding the working fluid. The connection includes a nozzle coaxial with the rectilinear portion of the duct, the latter being adjoined by a helical passage terminating in a diffuser. The invention enables recovering the meat of crustaceans in the form of a solid lump of the muscular tissue, devoid of the shell, liver, lipides, gastrointestinal tract and other impurities, and to use this meat for production of high-quality canned krill meat.

Abstract: A blast furnace cooling arrangemenet comprises a cooling screen which is disposed in an annular space between a furnace shell and its lining, and which is formed by vertically arranged rows of plates provided with main and additional internal ducts having common inlets and common outlets. Mounted above the cooling screen are drum separators which communicate through supply pipelines and take-off pipelines with the common inlets and outlets of the main and additional ducts of the plates of each vertical row, the above elements forming closed circuits of natural circulation of a cooling medium. Connected at the common inlets and outlets of the additional ducts of the vertical rows of the plates are circuits of forced circulation of a cooling medium.

Abstract: The invention relates to devices for checking the conditions of the coolant at the output of the coolant feed unit of an electrical machine with cryogenic cooling.The device for checking the condition of the coolant comprises a hollow rotor, in which cryogenic temperature is maintained. Located inside the hollow rotor at one end and coaxially with the rotor is a coolant feed unit having a stationary part made in the form of two coaxial tubes disposed with a gap with respect to each other and a movable part. One end of the coolant feed unit communicates with a coolant supply tank while the other end communicates with a coolant collecting chamber, which, in turn, communicates with a unit for transferring the coolant into a liquid coolant receiver tank disposed at the other end of the hollow rotor and made, identically to the unit, in the form of two coaxial tubes.

Abstract: The apparatus comprises a hollow casing in the form of a solid of revolution having an inlet and an outlet, a spinner for imparting rotary motion within the casing to a fluid being purified, and a hollow filter element closed at one end, positioned coaxially within the casing and snugly fit with the open end in the outlet of the casing. The apparatus also includes a discharge connection piece for removal of the impurities that have been separated from the fluid being purified. The spinner is positioned at the inlet, and the discharge connection piece is attached to the lower portion of the casing. The filter element and the casing define a space tapering from the inlet toward the outlet, and the filter element being a frame with a covering having a water-repellent polymeric foam material applied thereto.

Abstract: A spot of light is formed upon a photosensitive material which is moved in a scanning direction, and the spot is vibrated to and fro along a vibration direction at a considerable angle to the scanning direction, and the amplitude of vibration, and the center of the vibration path, are controlled so that the spot exposes areas on the photosensitive material which form half-tone dots.

Abstract: A preheater unit which includes a chamber for boiler water and a domestic water heating coil is arranged in heat exchange relationship with the exhaust duct of a boiler of a heating system for extracting heat from the flue gases. Boiler water may be shut off to the heat radiating system in the summer although boiler water is fed to the preheater unit both in summer and in winter. The domestic water heating coil within the preheater unit is connected in series flow relationship with the domestic water heating coil interiorly of the boiler. A summer/winter switch is added to the conventional boiler circuitry to enable control of the water circulator by the thermostat in the winter, while the water circulator is operated by the upper limit aquastat during summer operation whenever the burner of the boiler is energized.

Abstract: Disclosed is a device for guniting the lining of casting ladles, comprising a platform which is mounted by means of adjustable supports on the ladle to be repaired. On the under side of the platform a guide is mounted so as to extend downward from the platform into the casting ladle. A carriage with a nozzle for supplying gunite onto the surface being repaired is mounted for reciprocating motion along the guide. The guide is fitted on sleds which, in turn, are set on a swivel table so as to permit radial displacement of the sleds relative to the axis of rotation of the swivel table, the swivel table being rotatably mounted on the platform. On the under side of the platform there is also arranged a detachable templet whose curvature is similar to the curvature of the horizontal cross-section of the ladle. A roller pair is mounted on the templet to run around it.

Abstract: A semicontinuous casting apparatus comprises a mould positioned above a secondary-cooling chamber which accommodates a dummy bar having a thickened portion and a body made in the form of a hydraulic cylinder intended to pull out a casting and mounted to move lengthwise of said chamber. For the dummy bar to be able to move, the apparatus is provided with alternately actuated index pins. The pins are fixed on stationary mounted legs and extend through openings in the walls of the secondary cooling chamber and cooperate with openings provided in the lateral sides of the thickened portion and body of the dummy bar.

Abstract: The machine is designed for automatic sorting of flat objects and automatic unloading of groups of sorted objects and comprises a cylindrical housing on whose walls storages of objects are arranged in several decks over the periphery thereof. A conveyor for conveying the objects is fashioned as a squirrel-cage return drum accommodated inside the housing, said drum carrying on its spokes, with a possibility of moving along the latter, object holders designed to convey the objects to the storages, containers for delivering the objects from the storages and cams for moving storage platforms upon the extraction of objects, said cams cooperating via selector unit with a respective profile of a stationary master form. A feeder for feeding the objects into the machine is provided with a mechanism for feeding an array of objects, a separator and an inspection unit for identifying the distinguishing feature of each object.

Abstract: A method and apparatus for photographic printing wherein the margin of a printing paper is masked and the uncovered region inside the margin is exposed by projection or contact printing, after which most of the central exposed region is masked and a remaining uncovered region is exposed to provide a border bounding the central image.

Abstract: A mechanism for the automatic respooling of safety belts including a belt spindle rotatable in a housing and including a roll-up spring tensioned by the pull out of the belt and engaged by the belt spindle, and a friction brake relieving the belt pull back force. The friction brake including a first friction element connected to the belt spindle and a second friction element rotatably mounted and continuously in frictional engagement with the first friction element, and wherein the second friction element is fixed in angular relationship on the housing by means of a stop lever. The apparatus further comprises an automatically-functioning two-arm stop lever having a slot which is disposed about a pivot pin attached to said housing and said lever is pivoted on said pin and displaced or movable along said slot.

Abstract: A condenser for isolating solid substances from a vapor and gas mixture and pulps comprises a vertical cylindrical casing having a conical bottom and a vertical rotary drum accommodated in the casing and adjoining with its outer periphery to vertically extending internal protrusions of the casing walls in such a manner that the drum and the protrusions form a vertical transversal partition wall which is in a spaced relationship with respect to the casing bottom, and the interior of the casing represents a U-shaped space. Pipes for admission of a vapor and gas mixture and a pulp that does not contain rare-earth metals are provided in the upper portion of one inlet branch of the U-shaped space, and a pipe for discharge of the vapor and gas mixture cleaned from solid substances is provided in the upper portion of the other outlet branch of the U-shaped space. A pipe for removal of solid substances is provided in the lower portion of the conical bottom.

Abstract: There is proposed a method of impregnation of cermet electrodes of an alkaline storage battery, which comprises the steps of reeling a sintered band stock together with a spacer element arranged throughout the entire length and width of the band stock and providing an appropriate space between the turns of the band stock, and placing said reeled band stock together with the spacer element into active solutions.

Abstract: An impact mechanism operated with gaseous fluid under pressure fed from a source of fluid having a casing with an inner cylindrical space. A piston is accommodated for reciprocation within the cylindrical space of the casing to divide the space into a work stroke chamber and an idle stroke chamber. The chambers are in communication with the source of gaseous fluid through a distribution means for reciprocation of the piston under the action of fluid. A valve is provided over the inlet port of at least one chamber to admit gaseous fluid under pressure thereto. The valve comprises biasing means in the form of a helical compression spring mounted coaxially with the inlet port of the chamber. One end of the spring is tightly sealed and the other end is fixed over the inlet port of the casing. Gaseous fluids under pressure is admitted to the chamber through gaps between the turns of the spring when the spring is expanded, and the admission is interrupted when the spring is compressed.

Abstract: An induction heater having a cryoresistive induction coil comprising an induction coil positioned in a cryostat filled with a cryogenic coolant having a temperature in the range of from 15.degree. to 120.degree. K., a heat-insulating element disposed around the charge to be heated, and a cooled baffle interposed between the cryostat and the heat-insulating element, the induction coil being formed of a metal with chemical purity of 99.99 percent, and at least a part of the cryostat being made of a dielectric material.

Abstract: A method of producing a complex mineral fertilizer is disclosed, comprising the steps of decomposing polyhalite at a temperature not exceeding 110.degree. C. in the presence of dilute nitric acid, neutralizing the obtained suspension with a substance selected from the group consisting of calcium carbonate, calcium hydroxide and calcium oxide, and separating the resultant product.

Abstract: A device is described for musical instruments, and particularly stringed musical instruments such as a guitar, which can controllably and selectively sustain the musical sounds produced by the instrument. The device includes an electrical pick-up proximate to the strings of the guitar for generating electrical signals which correspond to the vibrations of the strings. The signals are amplified by the device and are converted in a loud speaker or other transducer mounted on the instrument and proximate to the strings into mechanical vibrations which sympathetically reinforce the initial vibrations and maintain the strings in a vibratory state and thereby sustain the sound.

Abstract: A device for mounting the breaking cone of an inertia crusher having a crushing bowl and a breaking cone arranged within the crushing bowl comprises a shell, the top portion of which contains a spherical support provided with a central cylindrical hole to receive a shaft of the breaking cone, and in the bottom portion thereof, there is arranged a ball spindle interconnected with a bush carrying an out-of-balance weight on the outer surface thereof intended for placing the breaking cone shaft therewithin. The bush is of such a length that its upper end is disposed in the central cylindrical hole and enters it so far that the bush rests, when tilted, upon the wall of the central cylindrical hole. Also, an annular projection in the bottom portion of the shell serves as a support for the out-of-balance weight when the bush rests upon the wall of the cylindrical hole.

Abstract: A method and apparatus are disclosed for wrapping an object in a sheet. A retainer formed with a slot is moved along a work path. A piece of sheet is supplied across the opening of the slot; then the object is inserted into the slot and pushes the sheet to the back of the slot against the retainer, with the edges of the sheet sticking out between the object and the edges of the slot, with part of the surface of the object being free; then a pressure plate is placed adjacent to the free surface, the outward facing surface of this plate being smooth; then first one, and then the other, protruding edge of the sheet is wrapped round the object and over the pressure plate by an embracing arm, so that the edges of the sheet overlap; then these edges are joined by a joiner bearing against the smooth part of the pressure plate; and then the wrapped object is discharged from the retainer.