Abstract: The invention provides a composite carbon or graphite having desirable properties such as corrosion and wear resistance. The invention combines a graphite substrate with a protective porous zone of silicon carbide. The whole body of graphite plus silicon carbide then is infiltrated with aluminum phosphate. An adhered barrier of silicon carbide, ranging in thickness between 0.015 and 0.050 inch thick is integrated with a graphite stratum to form a very hard surface, resistant to mechanical and chemical wear. The silicon carbide barrier is closely compatible to the graphite substrate, in resistance to thermal shock and in qualities of thermal expansion. In order to improve oxidation resistance further, a new composition was formed by infiltrating aluminum phosphate through the silicon carbide into the graphite to form a single body of composite graphite.

Abstract: The invention provides a composite carbon or graphite having desirable properties such as corrosion and wear resistance. The invention combines a graphite substrate with a protective porous zone of silicon carbide. The whole body of graphite plus silicon carbide then is infiltrated with aluminum phosphate. An adhered barrier of silicon carbide, ranging in thickness between 0.015 and 0.050 inch thick is integrated with a graphite stratum to form a very hard surface, resistant to mechanical and chemical wear. The silicon carbide barrier is closely compatible to the graphite substrate, in resistance to thermal shock and in qualities of thermal expansion. In order to improve oxidation resistance further, a new composition was formed by infiltrating aluminum phosphate through the silicon carbide into the graphite to form a single body of composite graphite.

Abstract: An electrode probe assembly for monitoring and finding fault in the glass lining of metal vessels, pipes or the like, characterized by a cup-shaped electrode with an insulated stud inserted through a hole in the wall of a mounting member. An insulating gasket insulates the electrode from the member. Resilient means bias the cup-shape electrode against the gasket preventing leakage due to shrinkage of the gasket. Electrical connection of an insulated circuit is made to the stud.

Abstract: A method and apparatus for cleaning a succession of workpieces such as automobile engine blocks includes a first cleaning mechanism wherein cleaning media such as steel shot is directed against the workpieces. After being discharged from the first cleaning mechanism, the workpieces are inverted and passed through a second cleaning mechanism where cleaning media again is directed against the workpieces. In the second cleaning mechanism, the workpieces are separated so that the ends of the workpieces can be cleaned. The invention includes turning mechanisms for inverting the workpieces one-by-one, as well as devices for controlling the movement of the workpieces through the different cleaning and turning mechanisms.

Abstract: Disclosed is an apparatus and method for the integrated, continuous, high speed manufacture of metallic strip, especially brass, from a melt. The apparatus comprises a chilled casting mold in liquid communication with a melt, means for drawing a rod through the mold at a constant rate and means for oscillating the mold in a pattern of forward and reverse strokes with respect to the direction of travel of the rod. Conversion of the rod to strip comprises flattening in a hot rolling mill, and quenching. In accordance with known procedures, the produced strip can be further reduced in cross section in one or more cold rolling mill or other hot rolling mills if desired.

Abstract: The invention relates to a ceramic fiber felt or mat having one portion comprising a high temperature resistant ceramic fiber and another portion of lower temperature resistant ceramic fiber. The two portions are joined seamlessly by an intermingling and intimate relationship of the two fiber types during formation of the mat. The invention further provides apparatus for formation of such ceramic fiber composites and further provides for forming such composite ceramic fiber members into modules.

Abstract: A silicon carbide-to-metal joint includes a thin layer of metal adherent to the ceramic material, a compliant layer of metal overlying the thin metal layer and a brazing alloy in contact with the metal to which the ceramic material is joined.A method for preparing a silicon carbide surface for joining by metallic brazing to a metal includes the steps of applying a thin layer of metal adherent to the ceramic surface followed by application of a compliant layer of metal.Also described is an easily brazable silicon carbide article which includes a silicon carbide substrate, a thin electrically conductive adherent metal layer overlying the substrate and a compliant metal layer overlying the thin metal layer.

Abstract: A flow sensor to detect changes in the mass flow per unit time of pneumatically conveyed particles within a system. The flow sensor or detector includes a conduit segment formed of a hard material so that a wall of the segment will vibrate due to the impacting of the particles thereagainst as they flow through the conduit segment. There is associated with the segment a vibration excitable piezoelectric transducer which has a resonant frequency and which at the resonant frequency generates an electrical signal or high voltage as compared to that generated by the transducer at all other frequencies, above and below the resonant frequency. Any deviation in the high generated voltage is utilized to detect a change in the kinetic energy of the particles flowing through the conduit segment.

Abstract: What is disclosed is a multi-hubbed, separable blade agitator assembly wherein the exterior surfaces of the hubs of each agitator blade as well as the exterior surface of the drive shaft are coated with glass and the hubs are interference fitted to the drive shaft in glass-to-glass surface contact sufficient to withstand torque imparted to the agitator blades by the drive shaft.

Abstract: Surface oxides, such as copper, zinc and aluminum oxides, are effectively removed from copper-base alloys by a process comprising:(a) contacting the alloy surface with an aqueous solution containing potassium ions, e.g. a solution prepared by dissolving potassium hydroxide in water; and(b) subsequently contacting the alloy surface with an aqueous solution comprising an acid, a peroxide, and a metal oxide, e.g. a solution of sulfuric acid, hydrogen peroxide and molybdic acid, the solution having:(i) an acid equivalent of a sulfuric acid solution of about 4 to 30 percent by volume;(ii) a peroxide concentration of about 1 to 30 percent by volume; and(iii) a metal oxide concentration of about 0.1 to 5 percent by volume.

Abstract: Disclosed is a system for remelting light gauge scrap metals which includes a remelting furnace with separate heating and melting chambers and pump means for inducing circulation of molten metal between the two. Also included are auger means adapted to include light gauge "floating" scrap metal from the melt into the central zone of the melt.

Abstract: The present invention relates to improvements in internal combustion engines by the utilization of sintered silicon carbide for the fabrication of certain engine components wherein the silicon carbide starting material used to produce the sintered components is in an ultra-fine form. The engine components comprise the valve train and the power assembly. The valve train is comprised of the valve guides, valves, valve caps, rocker arms, valve spring retainer rings, push rods and tappets (lifters). The power assembly is comprised of cylinder lines, valve seats, exhaust port liners, exhaust manifold, flames plates, pistons, piston rings, piston pins and connecting rods.

Abstract: New porous semiconductor dopant carriers are disclosed together with a method for the diffusion doping of semiconductors by the vapor phase transport of an n or p type dopants, such as phosphorus, arsenic, antimony, boron, gallium, aluminum, zinc, silicon, tellurium, tin and cadmium to the semiconductor host substrate; wherein the dopant source comprises a dopant containing porous, inert, rigid dimensionally stable and thermal shock resistant reaction sintered Si.sub.3 N.sub.4 carrier material.

Abstract: The present invention includes a system for mounting a sensor probe through the wall of a chemical vessel or other fluid container such that a sensing element can be located within. The system includes means for maintaining the sensing probe within the vessel in a fluid-tight, elevated temperature-resistant and corrosion-resistant seal. The system further includes provisions for removing, from the exterior of the reactor vessel, the sensing probe from the fixed sensing probe holder assembly which is within the interior of the reactor vessel. Further, means are included by which a sensing probe of an extended length which is mounted through the top of a chemical reactor vessel, can be inserted into and removed from the reaction vessel even with a low overhead situation above the uppermost portion of that reactor vessel.

Abstract: The problem of distortion in the shape of the vessel by simultaneous heating and rolling at high temperatures is remedied by adding shape retaining, firing rings to the vessel. Firing rings are rings spacedly attached to the periphery of the vessel to maintain the vessel out of direct contact with the rotating means while the vessel is heated to glass firing temperatures. Usually two rings are used, however, more than two may be utilized if desired. The rings extend a sufficient distance from the vessel side so that distortion of the vessel during glassing and rolling is prevented. Typically, the rings extend outward from the vessel wall a distance of from about 2 inches to about 18 inches and, more preferably, from about 4 inches to about 12 inches. The firing rings are loose fitted, or mounted, over the vessel exterior and preferably are positioned near or at the knuckle radius or radii of the vessel.

Abstract: A refractory that is highly resistant to sequential steam oxidation and molten alkali attack is formed by reaction nitriding a mixture of silicon carbide grain, silicon metal and aluminum metal. The refractory is suitable as a blast furnace lining.

Abstract: A ceramic part having one of a boss projecting therefrom or a bore therein is joined to a metal part having a complementary boss or bore. The ceramic and metallic parts overlap one another such that the boss is within the bore when assembled. A metallic insert is bonded to the ceramic part and secured by threads to the metallic part in the overlapping area. Metallic part and metallic insert are dimensioned such that when the joint is fully assembled an end of the insert bears on the metallic part and the ceramic and metallic parts do not contact one another.

Abstract: Apparatus for etching a metal surface utilizes a specially shrouded centrifugal throwing wheel to effect a uniform, non-pulsating application of very fine, lightweight, impact blasting media. The resulting etched finish is of a fine-grained quality suitable for use in lithography. A replaceable, wear-resistant liner is provided within the shroud.

Abstract: A throwing wheel assembly for providing an even discharge of impact blast material along the face of a vane is disclosed herein. An impeller positioned in a non-parallel relationship to the outer impeller casing is also provided in a spatial relationship which aids in providing an even flow of impact blast material to the vanes. A deflector plate is provided for directing stray blast material onto the vanes.

Abstract: An open porous ceramic article having an outer skin and an open porous interior. The interior has a continuous matrix of ceramic material which includes a plurality of chambers of predetermined shape and size distributed throughout the matrix. The chambers are in communication with one another; the passageways are smaller in cross-sectional area than the chambers connected thereby. With its skin removed, the article may be used as a filter for molten metal. With its skin intact, the article is useful as thermal insulation.The open porous ceramic article may be made by coating a predetermined volume of thermally degradable beads with a predetermined quantity of binder capable of taking a set and thereafter molding the coated beads under pressure in a mold until the binder is set. A slurry of ceramic material fills the interstices of the mass of the coated beads. After the ceramic slurry has set, the resulting block is dried to remove the excess moisture from the ceramic material.