Abstract: A thread cutter assembly in a sewing machine having a thread cutting cam which is driven by an opener shaft operated in response to the rotation of the rotary shaft of a rotary hook assembly. A movable edge is coupled to a cam follower engageable with the thread cutting cam. The engagement and disengagement of the cam follower and the thread cutting cam are controlled by a control mechanism to carry out a thread cutting operation.

Abstract: A polyborosiloxane composition to be used for the formation of an insulating layer on an electric conductor comprises (A) a polyborosiloxane produced by the reaction of boric acid, a boric acid derivative, or a halogenated boron with a silane compound and a silicone oil, (B) a silicone resin or a synthetic resin having a nitrogen-containing heterocyclic ring in the molecule, (C) an inorganic filler, and (D) a common solvent for (A) and (B). An insulated electric wire excellent in thermal resistance is obtained by applying the composition to an electric conductor and baking the applied layer of the composition.

Abstract: A process for directly liquefying coal in a reactor including a preheating section and a reaction section, each having a plurality of pressure-resistant vertical pipes, comprises introducing into the preheating section a paste consisting of finely divided coal, catalyst and heavy oil. In the preheating section the paste is heated to a temperature of 380.degree. to 410.degree. C. and preheated hydrogen is blown into each pipe to create a velocity of Reynolds number equal to at least 3.times.10.sup.3 and an axial dispersion coefficient of not more than 0.05. The preheated paste and hydrogen are forwarded to the reaction section where they are heated to a temperature of 400.degree. to 500.degree. C. and further hydrogen is introduced into each pipe of the reaction section to maintain the velocity and axial dispersion values and a high partial pressure of hydrogen. The total quantity of hydrogen introduced is 1 to 3 times the stoichiometric value.

Abstract: Disclosed is a walking beam and more particularly its driving mechanisms whereby a material placed on a plurality of stationary beams for transfer, e.g., a steel product such as a steel pipe or round bar is raised from below, moved forward and lowered again onto the stationary beams by a plurality of transfer beams and this process is repeated to effect the transfer of the material. Each of the driving mechanisms includes a first link for causing the transfer beam to make a circular motion and the first link is rotatable about a supporting shaft with a radius of rotation l. The supporting shaft is fitted in the forward end of a second link and is rotatable about a main rotating shaft with a radius of rotation 2l. Mounted also on the supporting shaft is a first gear which is rotatable along with the first link and the first gear is in mesh with a second gear mounted on the main rotating shaft.

Abstract: A mixture containing monochloroacetic acid and dichloroacetic acid as the main components are admixed with 5-25% by weight of water on the basis of sum total of monochloroacetic acid, dichloroacetic acid and water, and subjected to adiabatic cooling under a pressure of 133 to 2,660 Pa, whereby monochloroacetic acid is crystallized with a high purity.

Abstract: A slurry storage tank comprises a central vertical column arranged therein. A drive mechanism is mounted on the upper portion of the column. A plurality of rake arms with rake elements are arranged within the tank adjacent to its bottom. The rake arms are slowly rotated about the column by the drive mechanism to direct the lower portion of the slurry toward the side wall of the tank. The slurry is withdrawn from the lower portion of the tank by a pumping means and delivered through a pipe means to a plurality of vertical guide pipes supported by the top wall of the tank and extending into the tank. The withdrawn slurry is distributed over the entire surface of the slurry in the tank through the guide pipes to thereby maintain the slurry in the tank in a homogeneous state.

Abstract: A mash column (2) and a rectifying column (4) are used in combination, and impurities contained in mash feed (8) is removed out of the mash column. A salt or salts are added to the top of the rectifying column (4). Alcohol supplied from the mash column (2) is subjected to rectification in the rectifying column (4), and ethyl alcohol is obtained from the top of the rectifying column (4). Bottom products from the rectifying column (4) is concentrated by an evaporator (6) and the concentrated salt or salts solution is recycled to the rectifying column (4). Vapor generated by the evaporator (6) is used as a heat source for the mash column (2).

Abstract: In a process for directly liquefying coal, a paste consisting of finely divided coal, catalyst and heavy oil can be treated for thermal cracking and hydrocracking with a high liquid/space ratio and short residence time in a preheating section and a reaction section. An apparatus threfor comprises a plural number of pipe units having apertures for hydrogen injection and apertures for the paste of a low concentration or heavy oil injection and a gas-liquid separator for removing H.sub.2 O, methane, etc., the pipe units being formed in such a manner that a Reynolds number of 3.times.10.sup.3 or greater and an axial dispersion coefficient of 0.05 or smaller are achieved for the fluid flow therein.

Abstract: A heat insulated tank is disclosed having inner and outer walls between which a supporting material is interposed. The material comprises a molding of alkaline earth metal silicates or a molding of composite material based thereon having a continuous open cell structure and subjected to heat treatment under vacuum. Inside and outside faces of said supporting material are provided with a suitable number of grooves. The entire surface of said supporting material is impregnated with a solution of sodium silicate, potassium silicate or ethyl silicate and subjected to baking.The supporting material has a high insulating capability and a high resistance to compression, thus it is applicable to square shaped tanks in addition to conventional spherical or cylindrical ones. The tank is easy to manufacture with increased storage capacity.

Abstract: This invention relates to a process for hydrocracking a waste rubber such as used tires, used conveyor belts, used hoses etc., and more particularly to a process for hydrocracking such waste rubber with a specific catalyst obtained by mixing (1) a main catalyst of an iron compound with (2) an auxiliary catalyst of metal compounds of the Periodic Table, Group VI, based on a synergistic catalyst action with sulfur contained in said waste rubber so that said waste rubber is decomposed into an oil contents and carbon.

Abstract: A method for preparing a novel polymer which comprises polymerizing a polymerizable material selected from the group consisting of(a) substituted or unsubstituted dicyclopentadiene;(b) a cationically polymerizable unsaturated hydrocarbon-containing fraction obtained by distilling a cracking or reforming product of a petroleum and having a boiling point in the range of -20.degree. C. to 280.degree. C.;(c) a cationically polymerizable vinyl aromatic hydrocarbon having 8 to 10 carbon atoms;(d) a mixture of two or three of ingredients (a), (b) and (c); and(e) a mixture of any one of ingredients (a) to (d)with a cationically polymerizable unsaturated aliphatic hydrocarbon having 4 to 10 carbon atoms in the presence of a cationic polymerization catalyst; wherein a high-boiling product having a boiling point of at least about 150.degree. C. and an oxygen content of at least 0.

Abstract: Sterilization of a dialyzer, using a saturated and wet semipermeable membrane and irradiating said dialyzer in the presence of an antibacterial agent. The method is especially effective and safe, affords elimination of labor for preparation for dialysis, and has special utility when the dialyzer is an artificial kidney containing a multiplicity of hollow filament semipermeable membranes.

Abstract: A trolley conveyor comprising a hollow guide rail within which an endless conveyor chain is centrally supported by guide rollers. A plurality of spaced U-shaped hangers supported by said chain extend through a longitudinal opening in one side of the guide rail spaced above the bottom of the rail. The lower side of the guide rail below the opening is inclined outwardly and serves to contain foreign matter present within the guide rail as well as to catch matter falling from above. The hangers each include a projection adjacent the longitudinal opening which serves to prevent the splashing of foreign matter from the interior of the guide rail out through the opening.

Abstract: A method of purifying exhaust gases of an internal combustion engine by a manifold reactor, wherein secondary air is dividedly supplied at first and second stages especially in a cold starting or accelerating condition of the engine, to burn combustible components in a stepwise manner while avoiding too much cooling of the exhaust gases before the recombustion of the combustible components takes place. This method is effected by a two-staged secondary air supply port structure operated by a control system which responds to operational conditions of the engine.

Abstract: An ignition system for rotary piston engines is disclosed wherein a plurality of ignition plugs are arranged and disposed in the combustion chamber in the directon of the rotation of a piston and connected to a common ignition coil so that one of them may be selectively energized depending upon the changing engine operations. The optimum ignition timing may be secured to minimize the pollutions in the exhaust gases.

Abstract: A structure for preventing oil leakage which occurs between a side wall of a rotor and the inner surface of a side housing in a rotary engine, comprising at least one oil groove formed in the side wall of the rotor in a region located inside of a conventional annular oil seal means. The oil groove formed in the side wall of the rotor extends helically around the center of the rotor.