Abstract: A stack damper valve comprising a pair of semicircular steel discs typically joined by a removable piano-type hinge. Each of the discs pivot upwardly in the direction of flow from a closed to an open position and vice versa. In the closed position the discs seat in a metal-to-metal relationship against a circular truncated steel seat which is secured such as by welding to the inner surface of the steel stack in which the valve is mounted.

Abstract: A cylinder valve comprising a hollow cylinder having a cross-passage, for use as a valve element, preferably in high temperature fluid solid service, to block flow. The cylinder is enclosed in a refractory lined steel body which includes a main flow passage. The valve cylinder can be rotated 90.degree. about its longitudinal axis to either fully open or fully close the flow passage in the extreme cases. It can also function in an intermediate position as a throttling member. Water or other coolant flow may be provided and maintained through the cylinder if hollow, or the cylinder can be solid for small size valves. The refractory in the main flow passage surrounding the cylinder serves the dual purpose of valve seat and as insulation against extreme temperatures.

Abstract: The present invention is directed to silicon carbide whisker recovery from a mixture of silicon carbide whiskers and carbonaceous silicon carbide particles. The invention involves shredding the mixture down to a specified size, dispersing the mixture in water to form an aqueous mixture, agitating the aqueous mixture, mixing the aqueous mixture with an immiscible organic solvent which is lighter than water, agitating the resulting water-organic solvent mixture, allowing the organic solvent and its contents to rise above the water and its contents, separating the two liquid phases into an organic solvent phase and an aqueous phase and, lastly, performing a solid-liquid separation on each of the two phases, thereby obtaining from the aqueous solution the desired silicon carbide whiskers and obtaining from the organic solvent solution a carbonaceous silicon carbide particle product.

Abstract: The present invention is directed to electric current-producing cells having specified mixed cathodes. The cells comprise: (a) an anode having as its anode-active material one or more metals selected from the group consisting of the Periodic Table Group IA metals, Group IB metals, Group IIA metals and Group IIB metals; (b) a cathode having as its cathode-active material a mixture containing: (i) one or more cathode-active, high energy density chalcogenide compounds selected from the group consisting of VS.sub.a, VO.sub.a, C.sub.x S, MoO.sub.z and MoS.sub.z, wherein a is a numerical value of about 1.8 to about 2.7, wherein x is a numerical value of about 4 to about 16 and wherein z is a numerical value of about 2.5 to about 3.5; and (ii) one or more cathode-active, high rate chalcogenide compounds selected from the group consisting of TiS.sub.y, TiSe.sub.y and VSe.sub.y wherein y is a numerical value of about 1.8 to about 2.

Abstract: A class of reagents are synthesized from an aminobenzaldehyde base compound. The reagents are stable, sensitive, and useful in quantitative and qualitative analyses for: primary aromatic and aliphatic amines, reactive compounds containing methylene and amido (e.g., urea) groups; amino acids, enzymes, and immunoreactants.

Abstract: Method and apparatus suitable for automatic assay of fluid samples, particularly immunoassays, in which a reaction product of the assay is bound to a magnetically attractable particle and separated from the reaction mixture by use of a magnetic trap. The method and apparatus are of especial use in radioimmunoassays carried out in an automated continuous-flow manner.