Abstract: A method of microencapsulation is disclosed whereby two or more organic-in-aqueous emulsions, each containing a reactive component in the organic phase, are mixed together causing the reactive components to react and form polymeric walls around the organic droplets. Either or both emulsions may contain one or more fill materials in their organic phases.

Abstract: A method and apparatus for fabricating a thermoelectric device includes forming a matrix board (12) with an array of orifices (100) formed therein. A plurality of P-type thermoelements (96) are formed and then a vacuum chuck (92) is utilized to dispose alternating ones of the elements (96) into the alternating ones of the orifices (100). A plurality of N-type elements (108) is formed and a vacuum chuck (104) is utilized to dispose alternating ones of the elements (108) into the remaining orifices (100) of the matrix (12). This forms an assembled array (52). A plurality of conductive tabs (114) is placed onto the P-type elements (98) and N-type elements (108) by a vacuum chuck (116). A second set of conductive tabs (120) is disposed on the opposite side of the assembled array by a vacuum chuck (124). A solder flow oven (54) and a solder flow oven (76) are utilized to reflow the solder on the tabs between the two operations.

Abstract: A uniform reticulated intrastructure (56) is placed in a container (58) and surrounded by beryllium powder (72). After closing the container (58) and applying heat and pressure, a hardened form is taken out of the container. The intrastructure (56) is then removed leaving a lightweight solid beryllium body (72) suitable for use as a mirror (52). Means (62, 66) are provided to control the spacing of the intrastructure elements during the forming process.

Abstract: A process is provided for preparing tricyclopentadienyl cerium as well as the mono and dicyclopentadienyl cerium intermediates which comprises slowly adding alkali metal cyclopentadienide to a solution of ceric ammonium nitrate, forming, in sequence, and stepwise, monocyclopentadienyl cerium dinitrate, dicyclopentadienyl cerium mononitrate, and tricyclopentadienyl cerium.

Abstract: Hydrazine thruster 10 is mounted on support flange 14 with thermal mass 12 therebetween. The thermal mass 12 extracts sufficient heat so that the incoming hydrazine in inlet line 20, as well as that portion of the decomposition catalyst contained within the inlet portion of chamber housing 24, is maintained at a temperature below the hydrazine saturation temperature at the pressure within chamber housing 24 so that at any on/off operating duty cycles for that installation, the hydrazine is discharged into the catalyst in chamber housing 24 as liquid.

Abstract: A mounting arrangement for a condition sensing probe and method of making the same are provided, the probe being disposed in an opening of a wall of an apparatus and having opposed ends one of which is disposed beyond the interior side of the wall and the other of which extends beyond the exterior side of the wall. A bracket is secured to the wall and has an interconnecting part operatively interconnected to an interconnecting part of the probe whereby the bracket holds the probe in a fixed axial position in the opening of the wall. The interconnecting part of the probe comprises a slot in the probe and the interconnecting part of the bracket comprises an abutment disposed in the slot to provide the sole interconnection between the bracket and the probe.

Abstract: The disclosed invention includes improved devices and materials for thermoelectric conversion, particularly for operation at temperatures of 300.degree. C. and below. Disordered p-type semiconductor elements incorporate compound adjuvants of silver and lead to achieve enhanced "figure of merit" values and corresponding increased efficiencies of thermoelectric conversion. Similar results are obtained with disordered n-type elements by employing lowered selenium contents, preferably in combination with cuprous bromide.Improved conversion devices include powder pressed elements from one or both of these materials.

Abstract: In a method for undetachably interconnecting discrete structural parts by means of a connecting or bonding material, the structural parts which are to be interconnected are arranged in an aligned manner in a hollow mold, and the interspaces between the hollow mold and the structural parts are filled with a sinterable metal powder. After the arrangement is heated to the sintering temperature of the metal powder, a sintered body results with at least partially embedded, rigidly interconnected structural parts, due to a diffusion bonding. Heat exchanger blocks may especially be produced according to such a method in a simple manner, without requiring that the separate structural parts must be pre-machined for an exact shape accuracy.

Abstract: A method for the implosive consolidation into a solid body of a mass of free particles, which mass consists, selectively, entirely of amorphous particles, or a mixture of amorphous and nonamorphous particles. During the consolidation act, pressure and temperature are controlled in a manner which assures that the consolidated amorphous particles in the solid body exhibit substantially the same amorphous characteristics as those displayed by the unconsolidated, free amorphous particles.

Abstract: An invention is disclosed which provides improved thermoelectric devices and methods of making and using the same. The device exhibits enhanced efficiency and operating life through the use of a bonding material comprising at least 75% busmuth together with an adherent metallic layer interposed between the boundary structure and correspondary thermoelectric semiconductor element.

Abstract: A process is provided for preparing ceric alkoxides, which comprises reacting ceric ammonium nitrate with an alcohol, including a lower aliphatic alcohol, under anhydrous conditions in the presence of an anhydrous base at a temperature within the range from about -30.degree. C. to about 200.degree. C. but preferably from 0.degree. to about 150.degree. C. until ceric alkoxide and the nitrate salt of the base are formed; ceric alkoxides of higher alcohols can be prepared by transetherification of the resulting ceric alkoxide with the higher alcohol, either simultaneously or sequentially, at a temperature within the range from about -30.degree. C. to about 200.degree. C.

Abstract: An improved process for the photochlorination of normal paraffins to prepare mono-chlorinated alkanes, in which the normal paraffin feed stream is only partially chlorinated and the unreacted normal paraffins separated and recycled, the recycled unreacted paraffin being treated with a basic material capable of removing polar impurities therefrom which may hinder the photochlorination reaction.

Abstract: Organic nitrogen compounds are formed in the vapor phase by organic radical formation by reaction of an organic compound, suitably an alkane, with hydroxyl radicals derived from the reaction between hydrogen peroxide and nitrogen dioxide and the nitration of the organic radicals, suitably with nitrogen dioxide. The process is conducted using a molecular oxygen additive which directs the reaction towards the formation of the nitrate corresponding to the organic compound which may predominate in the organic reaction products.

Abstract: A lattice array of metal sheathed mineral insulated cables each cable having a coaxial conductor comprising alternate lengths of dissimilar thermo-electric material to provide thermo-electric junctions. The junctions are in two groups of opposite polarity and those of one group are disposed at the intersections of the cables while those of the other are disposed between intersections. Localized temperature increases create differentials between groups of sensors and can be located by the co-ordinates of the lattice array.

Abstract: An improved drilling fluid and method for drilling a borehole, the drilling fluid comprising an aqueous dispersion of an emulsion polymerized latex comprised of an interpolymer of an olefinically unsaturated carboxylic acid monomer and at least one other, non-carboxylated polymerizable monomer, the latex being of a type which undergoes rapid increase in viscosity upon the addition of a sufficient amount of a basic material.

Abstract: A thermocouple instrument which includes a thermocouple element formed of two dissimilar conductors joined at the ends thereof; an inner protecting metal tube for containing said thermocouple element together with an insulating material and electrically insulated from said thermocouple element via the insulating material; and an outer protecting metal tube in which said inner protecting metal tube is inserted. In this thermocouple instrument, the thermal expansion coefficient of the metal forming said inner protecting metal tube is equal to or higher than the thermal expansion coefficient of the metal forming said outer protecting tube, and accordingly the inner protecting metal tube is rigidly engaged within the outer protecting metal tube with excellent vibration resistance and impact resistance.

Abstract: A process for producing a Cu-infiltrated sintered Fe-base material without requiring a separate Cu infiltration step is disclosed. The process comprises the steps of preparing two powder mixes, one having a predetermined composition with a powder of infiltrating material containing Cu powder or Cu alloy powder as the primary component, and the other having a predetermined composition without said powder of infiltrating material; pressing the two powder mixes into a compact having said powder of infiltrating material present locally; and sintering the compact under ordinary conditions so as to cause the infiltrant to penetrate into the infiltrant-free area simultaneously with the sintering.Also disclosed is a two-layer valve seat produced by this process.

Abstract: A flexible coaxial thermocouple wire comprising an insulated inner thermoelement and a braided outer thermoelement surrounding the insulation covering the inner thermoelement. The braided outer thermoelement, in addition to forming one conductor of a thermocouple pair, also serves to protect and contain the insulation. Also encompassed is the formation of a thermojunction at one end of the coaxial thermocouple wire and connection of a termination to the other end.

Abstract: Dinitrotoluene, which is produced by mixed acid nitration of toluene, is purified in a way which produces a product suitable for conversion to toluene diamine and a less environmentally objectionable by-product stream. The process involves contacting a crude dinitrotoluene stream containing by-product nitrophenolic materials with an alkaline material and monitoring the pH such that dinitroorthocresol by-product is maintained in the organic phase while the trinitroorthocresol by-products are converted to water-soluble materials and removed with an aqueous phase.