Abstract: A relatively thin coat of calcium metaborate is electrolytically-applied from a solution of calcium formate with boric acid directly to the surface of a boron-containing electrical steel and a substantially thicker overcoat of Mg(OH).sub.2 is electrolytically-deposited on the calcium metaborate coating to provide a duplex coating about 0.2 mil thick.

Abstract: A boron-containing electrical steel sheet is provided with an electrolytically-deposited boron-containing Mg(OH).sub.2 primary coating about 0.05 mil thick and a secondary coating of electrolytically-deposited Mg(OH).sub.2 about 0.15 mil thick. Magnesium formate is employed as the water-soluble magnesium salt in preparing the electrolytes.

Abstract: A turbine assembly is described comprising a casing, a rotor assembly disposed radially inwardly of the casing and adapted to discharge high velocity jets of liquid coolant toward the casing and a rotatable annular ring disposed intermediate the casing and rotor assembly. The ring includes a trough assembly so composed and arranged that liquid coolant impinging thereon is contained therein as a film and the ring rotates in response to such impingement. The ring speed is significantly less than the rotor speed such that erosion of the casing by the coolant is substantially reduced.

Abstract: Disclosed is a solution including an aromatic bis (ether dicarboxylic acid) component, an organic diamine component and a solvent system including a water-soluble organic solvent component, which may be a dipolar aprotic solvent or a monoalkyl ether of ethylene glycol or of diethylene glycol, and optionally water. The solution may be coated on a substrate and polymerized to form high quality polyetherimide coatings.

Abstract: Disclosed is an ultrathin permselective polyetherimide membrane having an average thickness of less than about 10 microns and formed of a polymeric composition comprising a polyetherimide prepared by reacting metaphenylenediamine and certain aromatic bis(ether anhydride)s. A gas separation process employing the membrane is also disclosed.

Abstract: A composite laminar membrane including a flexible microporous support layer and at least one ultrathin permeable nonporous polymeric membrane of 500 angstroms or less in thickness is prepared by a continuous process. A liquid substrate having a well in its upper surface is provided and polymer-containing casting solution is continuously supplied to the well to effect continuous solution spreading across the liquid surface. Solvent is removed and a web of the support material is continuously contacted with the resulting ultrathin membrane to continuously remove it upwardly from a region of the liquid surface. In a preferred embodiment, an additional well spaced from the removal region is employed for producing an additional membrane, which is continuously removed from its liquid surface in contiguous contact with the liquid-contact surface of the first membrane.

Abstract: In an integrated coal gasification power plant, a humidifier is provided for transferring as vapor, from the aqueous blowdown liquid into relatively dry air, both (I) at least a portion of the water contained in the aqueous liquid and (II) at least a portion of the volatile hydrocarbons therein. The resulting humidified air is advantageously employed as at least a portion of the hot air and water vapor included in the blast gas supplied via a boost compressor to the gasifier.

Abstract: A film-grid composite substrate for supporting specimens in electron microscopy comprises a specimen-support grid adapted for electron microscopy and an ultrathin film of a mixture of organopolysiloxane-polycarbonate interpolymer and polyphenylene oxide. Regions of a major surface of the film are in contiguous relationship with a major surface of the grid, while other major surface regions of the film span apertures defined by the grid structure.

Abstract: An improved grate construction for a fixed bed coal gasifier comprises an interrupted generally cylindrical platform including a plurality of sector-like portions and rotatable means, e.g. a stirrer, mounted for rotation adjacent the upper surface of each platform portion. The upper surface of each portion is inclined upwardly in a circumferential direction to an upper leading edge thereof from which an upright wall depends. The stirrer is rotated in the opposite circumferential direction for cooperating with the depending walls to reduce the size of clinkers and for promoting movement of solids from the shaft over the platform.

Abstract: A liquid cooled turbine bucket is provided with a plurality of generally radially extending subsurface coolant channels which are supplied with liquid coolant from a manifold in the bucket tip portion. Liquid coolant is delivered directly and solely to the bucket tip manifold via conduit means extending through the root and core portions of the bucket. The liquid coolant in the coolant channels removes heat from the turbine bucket by pool boiling, the resulting vapor being collected in vapor manifolds disposed radially inwardly from the channels and exhausted from the bucket.

Abstract: An irreversible heat-activatable switch includes a heat-shrinkable plastic sleeve and a pair of elongate resilient electrical conductors mounted in cantilevered manner within the sleeve interior. The conductors have a pair of diverging-converging (e.g. arcuate) portions including regions proximate the sleeve. Each arcuate portion extends from the mounted end portion of its conductor and terminates in another end portion provided with an electrical contact. The end portions are so opposed that the open-closed electrical circuit character of the pair of contacts irreversibly changes responsive to movement of the arcuate portions resulting from heat-shrinking the sleeve.

Abstract: An improved method is described for solvent casting ultrathin non-porous methylpentene polymer films. The casting solution comprises methylpentene polymer of a mixture thereof with organopolysiloxane-polycarbonate copolymer dissolved in a solvent system and is characterized by being able to spontaneously spread over the surface of the liquid casting substrate. In a preferred embodiment, large-area films less than 200 Angstroms in thickness may be repeatedly formed. The solidified films remain relatively free of tensile stress during formation. The casting solution is deposited in a narrow, longitudinally-extending defined region at the surface of the casting substrate. The surface area and perimeter of the defined region are enlarged over the surface of the casting substrate in a manner whereby the casting solution is moved relative to the casting substrate and, after desolvation, the polymer film formed remains stationary relative to the casting substrate and relatively free of tensile stress.

Abstract: An improved method and apparatus employing at least one immobilized liquid membrane separated from a liquid sweep by a gas-permeable barrier for removing a gaseous component from a gaseous mixture. The improvements include use of one or more liquid-filled passages extending through the gas-permeable barrier to effect diffusive transfer of active carrier species from the liquid sweep into the membrane, thereby maintaining the separation efficiency of each membrane. In a preferred embodiment, the improvements are applied to removal of hydrogen sulfide from mixtures thereof with carbon dioxide as found in gasified coal.

Abstract: Disclosed is a solution consisting essentially of a liquid ether solvent and dissolved therein a polyetheramide-acid-imide prepared by reacting at least one aromatic bis(ether anhydride) with at least one organic diamine. Also disclosed is a process for preparing the solution wherein the reaction is carried out in the ether solvent. The solution may be employed as a wire coating enamel.

Abstract: An ultra-high temperature gas turbine bucket is shown with subsurface cooling channels extending from a bucket platform to a manifold in the tip region of the bucket. A liquid trap is disposed radially outward from the manifold and is in communication therewith, the trap under conditions of normal operation remaining filled with liquid coolant. A liquid coolant discharge orifice communicates with the trap at the blade tip generally adjacent the leading edge thereof. Liquid coolant substantially free of entrained vaporized coolant is discharged from the trap through the discharge orifice and collected in a collection slot in the turbine casing. Vaporized coolant is discharged from a nozzle disposed at the trailing edge of the bucket in communication with the manifold.

Abstract: A passive flowmeter device is described comprising a conduit for conducting fluid flow therethrough, means located at or near one end of the conduit for introducing fluid flow into the conduit, means located at or near the other end of the conduit for removing fluid flow therefrom and means for detecting the presence in the fluid of quantities of a specific tracer substance, said detecting means being disposed within the conduit intermediate the ends thereof. In one form of the device means are provided in communication with the conduit for introducing therein a preselected tracer substance. The device operates by enabling a comparison between the rate of diffusion of the tracer substance in the given fluid with the rate of flow of the fluid as evidenced by the density gradient of quantities of the tracer substance transported by the fluid.

Abstract: A flywheel comprises a plurality of overlying fiber layers embedded in a monolithic matrix of binder material. The fibers of each layer are parallel to each other and extend in radial and chordal directions. The fibers of each successive layer are oriented at a single predetermined angle to those of a preceding adjacent layer such that at least four layers of fibers are disposed between any two layers in which the fibers of both such layers extend substantially parallel to each other. By this structure, the flywheel of the present invention is made to exhibit a high strength-to-weight ratio, the centrifugal force generated by the flywheel, when spinning, being accommodated by the fibers along the axial direction of each fiber.

Abstract: An elongate electrical conductor is continuously coated with electrostatically charged powder by passing the conductor upwardly through a tube into the upper portion of a container having a charged fluidized bed of the powder in a lower portion thereof. The tube extends upwardly through the bed and the tube height is adjusted relative to the upper surface of the bed to control the thickness of the powder coating. An array of electrodes having associated switches permits application of uniform coatings to conductors having a variety of shapes. Two or more conductors may be uniformly coated from the same fluidized bed in a container having a baffle which divides the upper portion into two or more compartments and spaced apart tubes extend upwardly into the different compartments.

Abstract: An automatic arrangement is provided for control of the flow of vaporized coolant used for removing heat from each of the current leads carrying current to the rotor winding of a superconducting rotor. That portion of each lead extending from a coolant vapor return duct (through which the leads enter the machine) into the rotor winding chamber is formed as a hollow insulated (electrically and thermally) structure. The terminal length thereof is turned radially outward and the open outer end thereof is disposed below the surface of the pool of liquid coolant in the rotor winding chamber. A vapor trap is defined in the hollow lead, the vapor therein having a pressure greater than the pressure in the vapor core in the rotor winding chamber, this pressure differential being accommodated by a difference between the liquid level of the pool and the level of the liquid entering into the outer end of the hollow lead.

Abstract: Disclosed is a curable resinous coating composition which includes a polyester resin and a relatively small amount of a titanium-containing curing agent and optionally includes a surfactant and/or a powder free-flow agent. The composition is characterized with a suitable balance of cure rate and melt flow properties for powder coating and curing to form insulating films on magnet wire and other substrates.