Abstract: Self-twisting yarns are made by a system in which a strand twisting device is engaged with the strand and moves at strand speed to twist the oppositely-extending sections of the strand in opposite directions. The strand is brought together with another strand and released, enabling it to untwist and twist itself to the other strand. Various arrangements are disclosed for maximizing the distance between twist reversal nodes, for cabling plied yarns together, for strengthening the strands, for reducing the tensile stresses imposed on the strands and for producing unique products with non-uniform node spacing or unequal strand lengths between adjacent pairs of nodes.

Abstract: Carbon blacks having a carbon content greater than 99%, a mean particle diameter of 250 to 300 A, an electrical resistivity, measured under a pressure of 6.3 bars, of 0.270 to 0.350 ohm.cm and a DBP index of 400 to 500 ml per 100 g of black are disclosed together with a process for their preparation by incomplete combustion of acetylene in air. These blacks may be used especially for the manufacture of electric cells.

Abstract: An electromagnetic relay comprising an electromagnetic device connectable to a power source, utilized to repel a movable blade and thus separate its movable contact from a fixed contact, driving the blade into another configuration in which it is maintained by a permanent magnet. The current in the energizing circuit of the electromagnetic device flows through the movable contact and through the fixed contact so that when the blade is driven into the second configuration, such energizing circuit is interrupted.

Abstract: A microscope in which the lens assembly and viewing stage can be positioned at any of several predetermined angular orientations for ease of viewing, the lens assembly includes a zoom magnification capability, and two slides can be pivotably mounted on the viewing stage for alternative positioning in the lens viewing zone without removal of the viewer's eye from the viewing lens, permitting rapid comparison of specimens. A base member has a curved channel, and a frame member has a curved portion with curvature matching that of the channel, permitting the frame member to be positioned on the base member with an adjustable angular orientation. A locking pin passes through an opening in the frame member and rests in a groove in the base member to retain the frame member at a predetermined angular orientation.

Abstract: In an improved process for the production of a finely divided oxide of a metal, silicon or mixtures thereof by the hydrolytic conversion of a corresponding volatile chloride of said metal, silicon or mixtures thereof in a flame; wherein said volatile chloride or said mixture of volatile chlorides in admixture with a combustible hydrogen-containing gas and air or oxygen are fed to a flame emitting from a burner into a reaction chamber to thereby form an oxide aerosol in waste gases from said burner; cooling said oxide and said waste gases; and separating said oxide from said waste gases; wherein the improvement comprises maintaining said waste gases substantially free of chlorine by reducing chlorine that forms during said conversion in said flame with hydrogen while cooling said waste gas below the temperature at which hydrogen and oxygen react in said waste gas.

Abstract: Volatiles-rich dust and kiln gases are removed from a cement kiln by means of a special by-pass probe system located in the inlet end of the kiln. The probe system is designated to prevent the build-up of solidified volatiles-rich dust on the probe surfaces.

Abstract: A process of dyeing or printing of synthetic fiber materials by means of disperse dyes carried out in the presence of at least one derivative of a metal having an atomic number in the range of 24 through 30 to prevent or diminish the degradation of the dye during the dyeing or printing process, and ready-to-use colorant compositions for this process.

Abstract: In a face gear assembly comprising a face gear and a pinion engaged therewith, the crest or top land of each tooth of the face gear is so formed as to touch the root surface or bottom land between two adjoining teeth of the pinion which are in mesh with the tooth, whereby the mutual engaging relationship of the face gear and the pinion can be regularly maintained.

Abstract: A fusible safety device for a pressure vessel includes a body of fusible material in the form of a tablet which acts as a leak-proofing gasket and is so arranged as not to be vulnerable to creep movement under normal temperature and pressure. The tablet is seated on a floor in a counterbore which puts the inside of the vessel in communication with atmosphere. The tablet is firmly compressed against the floor by a pressure plate in turn loaded by a sleeve screwing within the counterbore. The gas venting passage through the counterbore consists of a vent bore being the lesser diameter portion of the counterbore, and one or more holes in the pressure plate which are essentially out of axial alignment with the vent bore.

Abstract: A rotationally symmetrical supporting member provides lift in response to movement of air over its upper surface, and such air movement is produced by the impeller of a coaxially arranged drive unit, the base of which is connected to the supporting member so that counter torque from the drive unit imparts rotational movement to the supporting member. A carrier which may hold a load or supporting steering flaps is rotatably mounted in relation to the supporting means and to the driving unit.

Abstract: Finely divided precipitated silicic acid is obtained by the method of the invention.Compositions containing the finely divided precipitated silicic acid as a filler distributed in an elastomer such as an organopolysiloxane are disclosed.

Abstract: Apparatus for disjointing and removing the leg and thigh portions from the backs of poultry leg and back carcasses pendulously supported by the feet from shackles suspended from an overhead conveyor at spaced intervals with the back of each carcass lying between the legs in a reversed direction from the normal position. The apparatus comprises an endless dismembering conveyor mounted below the level of the shackles and having conveying elements engageable with one side of the carcass backs moving along a path that diverges both horizontally and vertically at an acute angle from the path of the overhead conveyor. Retaining bars are mounted closely above the dismembering conveyor conveying elements to extend axially along the conveyor in a spaced relationship as will contact the poultry carcasses immediately adjacent the juncture of the leg thighs and the backs and retain the backs between the retaining bars and the dismembering conveyor conveying elements.

Abstract: A clutch thrust bearing assembly includes a roller bearing, a clutch release fork for moving the roller bearing axially and a spring. The spring is connected to the inner race of the roller bearing and has opposite portions which bear against the two branches of the clutch release fork to center the fork relative to the bearing.

Abstract: An animal trap has two legs that are urged together by a spring, but are prevented from such movement by a pivotable cap on the end of one leg when the trap is set. A tongue mounted on a sleeve on the same leg as the cap prevents the cap from pivoting until an animal rotates the sleeve by displacing a trigger arm mounted on the sleeve. The cap has a convex tab which coacts with the flat tongue to permit the trap to be tripped even upon an incomplete rotation of the sleeve by the animal.

Abstract: Apparatus for splitting in half the breast of a poultry carcass comprising an elongated feed bar on which the carcass can be impaled to have the bar extending through the chicken immediately below the backbone and above the soft breastbone. A cutting blade is supported and rotated in a plane containing the feed bar with the axis of rotation perpendicular to and offset from the feed bar. A toothed conveyor extending along the lengthwise direction of the feed bar is mounted in close adjacency to the feed bar on the side opposite the cutting blade in a position to contact the back of an impaled poultry carcass and propel the carcass along the length of the feed car. An elongated breast support is pivotally supported in alignment with the feed bar for movement in the plane containing the feed bar and cutting blade about a pivotal axis offset from the feed bar on the same side as the cutting blade axis.

Abstract: Monolithic carrier matrixes are formed from high grade steel, consisting of alternating smooth and corrugated layers of sheet metal and/or screen cloth, which may be combined with layers of smooth screen cloth or of smooth or corrugated sheet metal, wherein the layers may be coated on their surfaces with a catalysis-promoting carrier material. These carrier matrixes may be used to produce catalysts for the purification of exhaust gases.