Abstract: A feed drive for the work holder of a zig-zag stitch group sewing machine comprises a rotatable cam plate and a work holder which is engaged with the plate and moved thereby within a rectilinear guide arranged adjacent the head portion of the sewing machine. The work holder is located adjacent the needle and it includes a driver plate which extends below the sewing machine arm portion and grips the workpiece from above. The cam plate is arranged in a standard of the machine and the work holder is driven by engagement of a sensing element in a groove of the cam plate which is connected to the work holder through a lever drive acting on a rotatable shaft arranged below the arm of the machine and connected with a crank and a link with a slide carrying the work holder which is disposed in a guide. The construction includes a seating for the workpiece which is movable parallel to the guide and is coupled with the driving plate.

Abstract: An electric vapor boiler has a closed vessel (1) containing water, a steam or vapor outlet conduit (4), a conduit (6) supplying liquid and/or returning condensed vapor, and a electric resistance heating device (7) for each high or medium boiler voltage phase immersed in the water. Each heating device (7) includes a bare metallic resistance wire (8) immersed in the water and mounted in such a manner as to vibrate between a pair of vertical open-ended cylinders (13, 14) forming insulating screens. Each wire (8) is directly connected between a phase terminal (11) and ground, that is, the vessel (1) and has a plurality of parallel vertically spaced spires (18) offset symetrically with respect to each other on each side of a generatrix (16) of an oblique surface in the enclosure between the cylinders (13, 14) and extending obliquely to the vertical direction in the vessel (1). The outer cylinder (13) extends above the surface of the water.

Abstract: The present invention relates to a method for forming a uniform, extremely thin film on the surface of plastics molded articles, films, sheets, synthetic paper, fibers, metal, and other objects, the film containing an anti-static agent, anti-fogging agent, anti-corrosive agent, mildewproofing agent, and the like. According to the method of the present invention, a homogenous solution or emulsion is prepared by dissolving a surfactant and agents in a solvent such as water with the aid of ultrasonic waves, and the solution is made into aerosol of fine particles by means of cavitation. The aerosol is brought into contact with an object, whereby the fine particles of aerosol are deposited on the object and a thin film of the solution is formed on the surface of the object due to the difference in surface tension between the surfactant and the object. After evaporation of the solvent, the agents are left on the surface of the object in the form of an extremely thin film.

Abstract: The purpose of this invention is a foldable music stand comprising a lectern or the like, which can be set in an inclined position, a vertical shaft and a folding leg support member. The lectern consists of a backplate and a shelf. The backplate is rotatably connected by a pivot means to the vertical shaft. The shelf of the lectern has a cross section in the shape of L and it is hinged to the lower edge of the backplate and attached by a lever into the vertical shaft. The lectern being in the inclined position or the operational position, a score is placed to rest against the backplate on the shelf. The leg support member is formed in a cross leg having a solid part and a moving part which can be moved in respect of this. The solid part is connected to the vertical shaft in the direction of the lectern. In the operational position the moving part is folded vertically in respect of the solid part.

Abstract: A method of interconnecting first and second material plies, each having one side coated with a thermoplastic material uses pressing means in the form of continuously rotatable pressing rollers and heating means in the form of a heating gas. The marginal edge portion of an uncoated side of the first ply is folded back upon itself to form a pocket along its edge and after a strip of thermoplastic material or a strip having thermoplastic coating on each side is folded lengthwise, it is inserted into the pocket. The marginal edge portion of a thermoplastically coated face of the second ply is then positioned over the folded-over marginal edge portion of the first ply. Thermoplastic material between the folded-over portion of the first ply and the marginal portion of the second ply and between the folded portions of the strip are then heated so that they become thermoplastic and they are pressed together to press the portions to be bonded together.

Abstract: A sheet separator for a sheet feeder comprises a friction cylinder which is rotatable for feeding a sheet from a stack of sheets. A retaining member is mounted for radial movement with respect to the friction cylinder. The retaining member has a friction surface which holds back other sheets in the stack and which forms with the friction cylinder a passage gap which is adjusted to the thickness of a sheet to be fed. A carrier is connected to and supports the retaining member. An adjustment mechanism is provided between the carrier and the retaining member for adjusting the passage gap width. A bracket is mounted for radial movement on the carrier and has a contact surface for engaging the friction cylinder or a sheet held in the passage gap. Signal switch is provided in the bracket and is activated by a checking element which is movably mounted to the bracket and engaged with either the carrier or the retaining member.

Abstract: A closing and filling unit having a piston valve (22) whose closure member (28) is provided with axial openings. A rotatable and slidable element (32) is provided for actuating the valve. Arrangements (35, 40, 41, 33, 36) are provided for utilizing the pressure of the fluid to force the element (32) into engagement with the piston (28). The device is adapted to be detachably fixed to the body of the valve by means of a screw-threaded boss through which extends an actuating rod (37) which is rigid with a piston (36) sliding in a chamber (33).

Abstract: A 2-substituted benzofuran derivative of general formula I or II ##STR1## in which R.sub.1 and R.sub.2, can be the same or different, and are a hydrogen atom, a halogen atom, an alkyl group containing 1 to 4 carbon atoms, an arylalkyl group, an aryl group, a hydroxyl group, an alkoxy group, or an NH.sub.2, NH-alkyl, N(alkyl).sub.2, NH(CO-alkyl), NH(CO-aryl) or NO.sub.2 group, or R.sub.1 and R.sub.2 can together form a ring of 5-8 carbon atoms; R.sub.3 is a hydrogen atom, an alkyl group containing 1 to 4 carbon atoms or an aryl group; R.sub.4 is a hydrogen atom, an alkyl group, an aryl or an arylalkyl group, R.sub.5 is a hydroxyl group, an alkoxy group, an OCO-alkyl, an OCO-aryl, OCOHN-alkyl or OCONH-aryl group, ##STR2## where n is a number between 1 and 4, R.sub.7 is a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms, and R.sub.8 and R.sub.

Abstract: A surfactant having the capacity of reducing the surface tension in pulmonary alveoli significantly is provided. The surfactant consists essentially of, based on the total weight of the surfactant, 50.6-85.0% of a chlorine phosphogylceride, 4.5-37.6% of an acid phospholipid, 4.6-24.6% of a fatty acid or its analogue and 0.1-10.0% of a lipoprotein derived from the lung of a mammal. These components cooperate to form a kind of film at a gas-liquid interface within pulmonary alveoli and reduce the surface tension. A pharmaceutical composition comprising the surfactant is useable for the clinical treatment of respiratory distress syndrome.

Abstract: In a sausage stuffing machine if the stuffed portion of a sausage casing bursts, for example in an area which is squeezed for forming a sausage end, the meat filling continues being discharged through a filling tube but is no longer capable of pulling off the gathered-up casing from the filling tube. With the further run of the pump, the sausage meat is spilled. By keeping the gathered-up casing, by means of an advance mechanism, compressed into a "block" and displacing it toward the mouth of the filling tube or toward a braking ring, proportionally to the stuffing of the casing, this advance can be transmitted through a motion transformer, to a pulse generator by which, with a constant advance, pulses are delivered at constant intervals. The pulses are received by a counter which is connectd to at least the drive of a feed pump for the sausage meat. If the casing bursts, the pulse generator stops and no pulses reach the counter.

Abstract: To obtain an efficiency of about 10% in photoelectrochemical solar cells, the pairing of semiconductor material for the working electrode and composition of the electrolyte liquid is of critical importance. The semiconductor material therefore should not be too expensive, and should have a short absorption length for light and be resistant to photocorrosion. Further, a non-toxic electrolyte should be employed permitting operation even without a hermetic seal. The photoelectrochemical solar cell of the invention utilizes a CuInSe.sub.2 or CuInS.sub.2 in a ternary compound, for the semiconductor material, which is used with an iodine-iodide solution as an electrolyte. In a method of fabricating a substrate for such a cell, a surface film is produced on a single-crystal or polycrystalline semiconductor material, particularly CuInSe.sub.

Abstract: The invention relates to a method of preparing material for hot briquetting by pyrolytic decomposition of bituminous coal in mixture with thermally widely stable substances at a temperature of 450.degree. to 530.degree. C., and to a suitable apparatus for carrying out this method. In a travelling bed reactor, the briquetting material is exposed to the pyrolytic decomposition of the bituminous coal component, and is held in continuous mixing and kneading motion. For this purpose, the briquetting material is moved initially in a rotational mixing and kneading motion predominantly at levels parallel to the plane of the axes of rollers of the briquetting press, during which motion it migrates downwardly by gravity at an average speed of less than 3 centimeters per second, whereupon, at the end of this motion, it is uniformly distributed by a rotational motion over the entire width of the rollers.

Abstract: Disclosed is a device suitable for semi-automatic rifles, and capable of timely feeding cartridges into the firing chamber without causing void loading of the weapon.The improved device comprises a sliding member controlled by the hammer and cooperating with a trowel-like lift. The device operates so as to position the lift for receiving a fresh cartridge from the magazine in advance of the striking of the firing pin by the hammer.

Abstract: A D-ribose-containing solution is produced in a high epimerization ratio, such as 60-94%, by epimerizing D-arabinose dissolved in an adequate solvent in the presence of a molybdic acid ion and a boric acid compound. The solution is useful as an inexpensive material on the industrial syntheses of vitamin B.sub.2 or nucleic acids.

Abstract: A cyclone comprising a cylindrical portion and an inverted conical portion, the cylindrical portion having a gas inlet connected thereto in its tangential direction and a gas outlet perforated through a ceiling panel thereof, the gas inlet allowing the introduction of a gas including powders therethrough, the inverted conical portion being connected to the cylindrical portion under its lower edge and having a collected powder outlet at the lower end thereof, characterized in that the gas outlet is perforated through the ceiling panel of the cylindrical portion so that the central axis of the gas outlet may be coaxially coincident with the central axis of the cylindrical portion; a cylindrical exhaust gas guide is disposed under the ceiling panel so as to surround the periphery of the gas outlet; and when a cross section of the cylindrical portion is separated into four sectors by an imaginary line passing through an intersection of an inner wall of the gas inlet and the cylindrical portion and passing through

Abstract: A device for attenuating pulsation of a fluid in a piping system comprises fluid-branching pipes extending from the piping system in which there are pulsation waves, and a plurality of orifice elements and a plurality of discs disposed in a dispersed fashion and having a small reflection factor of the pulsation wave and having a total friction factor greater than that of the entire piping system, thereby providing the effect of attenuating the pulsation of the fluid within the system without increasing the resistance of the piping system without increasing power consumption.

Abstract: The impact speed of a printed product which is delivered at a rapid rate into a pocket of a rotatable flywheel is reduced by engaging the printed product as it is propelled into the flywheel pocket adjacent its trailing edge. The invention includes a fly delivery wheel which may comprise a plurality of individual flywheel elements each having a plurality of flywheel pockets distributed around its circumference. The flywheel pockets open radially and as the openings of each pocket are moved around during the rotation of the flywheel the printed product is delivered into the opening and it moves at high impact speed into the pocket space. A cam is rotatably mounted adjacent the flywheel and adjacent a ring which is carried on a rotatable shaft and the printed products are delivered between the rotatable cam plate and the ring and into the pocket. The cam plate advantageously includes one or more cams having tips with elastic portions which move during rotation of the cam into close contact with the rings.

Abstract: To be able to treat the inside surface of metallic tubes by means of an electric glow discharge at pressures lower than heretofore in order to heat or coat such a surface, for example, an auxiliary electrode is positioned inside an article to be treated such as a tube extending close to the tube wall and parallel to the tube axis, with the auxiliary electrode and the tube being rotatable relative to each other. The apparatus and method are primarily for coating the inside of tubes.