Abstract: A filter for the lubricating oil and refrigerant within refrigerators, freezers and heat pumps is provided which does not interfere with the cooling cycle. The filter utilizes a housing with an orifice that functions as an outlet and an inlet for the transfer of fluids. The filter withdrawn fluids from a location between the compressor and the condenser when the compressor cycles on and returns the fluids when the compressor cycles off. Preferred embodiments of this invention provide for the release of additives to the fluids from the filter material. Also provided by the invention are vapor compression cycle devices which incorporate such a filter and a method of filtering said fluids.

Abstract: Inclusion compounds of a cyclodextrin, such as .beta.-cyclodextrin, and a palladium halide-diene complex, such as a complex of PdCl.sub.2 and 1,5-cyclooctadiene have been found to be effective hydrosilylation catalysts. One part heat curable organopolysiloxane compositions are also provided.

Abstract: Curable polyphenylene ether-polyepoxide compositions containing 1-methylimidazole as the primary curing catalyst have improved latency properties and are useful in the preparation of laminates and bonding sheets for printed circuit boards.

Abstract: Copolymer-containing compositions are prepared by the reaction of an epoxytriazine-capped polyphenylene ether with another polymer containing carboxy end groups, especially a polyester. The compositions have excellent properties and find utility as molding compositions and as compatibilizers for blends of similar polymers. Suitable epoxytriazine-capped polyphenylene ethers may be prepared by reaction of a polyphenylene ether with an epoxychlorotriazine such as diglycidyl chlorocyanurate, n-butyl glycidyl chlorocyanurate or mesityl glycidyl chlorocyanurate.

Abstract: Substituted alkoxy- or alkylthiochlorotriazines wherein the substituents on the alkoxy groups are chlorine, bromine or dialkylphosphato are useful as capping agents for polyphenylene ethers. The capped polyphenylene ethers form copolymers with other polymers containing nucleophilic groups, including polyesters, polyamides and functionalized olefin polymers. Such copolymers serve as compatibilizers in the formation of blends having high impact strength.

Abstract: A TiAl composition is prepared by ingot metallurgy to have higher strength and to have moderately reduced or improved ductility by altering the atomic ratio of the titanium and niobium to have what has been found to be a highly desirable effective aluminum concentration and by addition of niobium according to the approximate formula Ti.sub.48-37 Al.sub.46-49 Nb.sub.6-14.

Abstract: An alloy is disclosed which has been found to lend itself particularly well to thermomechanical processing. The alloy is strengthened by precipitates similar to those of Inconel 718 but the alloy matrix of the composition is a nickel-chromium-cobalt matrix rather than the nickel-chromium-iron matrix of the Inconel alloy. Also the alloy has grains of average diameter of 35 .mu.m or larger. The fatigue resistance, tensile strength and the rupture strength of the alloy is improved to a remarkable degree as a result of the thermomechanical processing. The thermomechanical processing is carried out below the recrystallization temperature to prevent nucleation of fine grains. The residual strains from the thermomechanical processing or cold working provides the remarkably favorable combination of alloy properties which are found.

Abstract: A process for producing a sinterable doped superconductive powder which contains a sufficient amount of superconductive compound which is at least coated with sufficient uranium-235 and/or plutonium-239 dopant atoms to enable the sinterable powder to be formed into a sintered superconductive body which can be irradiated with thermal neutrons to produce from about 0.25.times.10.sup.14 to about 5.times.10.sup.14 fission events per cubic centimeter of the resulting irradiated superconductive body, said superconductive compound being selected from the group consisting of Bi.sub.2 CaSr.sub.2 Cu.sub.2 O.sub.8 .+-.x where x ranges from zero to 0.5, Bi.sub.2-y Pb.sub.y Ca.sub.2 Sr.sub.2 Cu.sub.3 O.sub.10.+-.z where y ranges from 0.1 to 0.5 and z ranges from zero to less than 1, and mixtures thereof.

Abstract: Cyclic polycarbonate oligomers are converted to linear polycarbonates by the catalytic action of a monobasic metal salicylate. The polymerization reaction takes place only at relatively high temperatures, typically above about 220.degree. C., and rapidly only at temperatures above about 250.degree. C., and is therefore particularly useful in such operations as resin transfer molding. The catalyst may be coated on a fibrous reinforcing material used for composite formation.

Abstract: A method and apparatus for combining NMR response data of a sample from a plurality of closely spaced RF receiver coils of an NMR phased array in the time domain to form a composite NMR image wherein each of the RF receiver coils receives a different respective one of a plurality of NMR response signals, each of which is evoked from a portion of the sample within a field of a respective one of the receiver coils. The response signals are conditioned to develop a plurality of data point signals corresponding to the magnitude of each of the respective response signals from each of the receiver coils at successive time intervals. The data point signals are convolved by a time domain representation of a field map of the respective one of the receiver coils generating the corresponding one of the response signals. The convolved signals are combined on a time domain point-by-point basis to produce a time domain representation of the composite NMR image of the sample.

Abstract: A conductive film magnetic component such as an inductor or transformer includes a conductive film winding having a generally serpentine configuration when disposed in a plane. This film is folded to form a stack of layers with each "layer" comprising part of a winding turn and with successive "layers" connected at the folds via the continuous conductive film. The conductive film may be self-supporting and coated with a dielectric layer or may be disposed on a dielectric membrane. The film and membrane are preferably patterned photolithographically.

Abstract: A variable capacitor comprises two conductive plates with a liquid crystal material having an anisotropic dielectric constant disposed therebetween. The conductive plates are treated with a surfactant to align the liquid crystal molecules in a predetermined direction at the interfaces between the conductive plates and the liquid crystal material. A low-frequency control voltage above a threshold voltage is applied across the conductive plates to orient the molecules of the liquid crystal material so that the molecular axis with the highest dielectric constant aligns parallel to the applied voltage. Upon removal of the control voltage, the liquid crystal molecules resume their original orientation. In this way, the dielectric constant of the variable capacitor is varied between two predetermined values, thus varying the capacitance of the variable capacitor between two discrete values proportional thereto. An alternative control provides continuous control over a range of capacitance values.

Abstract: A starting aid for an electrodeless high intensity discharge (HID) lamp comprises at least one starting electrode which, at least during lamp starting, is situated adjacent to, and preferably in contact with, the portion of the arc tube nearest the arc discharge and oriented so as to provide a capacitive starting current that flows in substantially the same location as the arc discharge, thereby easing the transition from a relatively low current glow discharge to a relatively high current, high intensity discharge. The starting aid comprises one or more conductors that substantially conform to the shape of the arc tube at least during initiation of the arc discharge. After the lamp is started, the starting aid may be moved to a predetermined location away from the arc tube. Alternatively, the starting aid may comprise one or more fixed starting electrodes.

Abstract: A liquid crystal device includes at least one pixel electrode, formed on a transparent substrate, and having opposed first and second sides edges. A transparent cover glass is disposed in parallel alignment with the substrate and has a ground plane formed thereon opposite to the pixel electrode. A multiplicity of liquid crystal molecules is sealably contained between the substrate and cover glass. In one embodiment, a field control electrode (FCE) is formed on the substrate proximate to the pixel electrode first side edge. A voltage of proper polarity and magnitude may be applied to the FCE relative to the ground plane electrode to avoid a disclination line (mobile inversion wall) proximate to the pixel electrode first side edge when another voltage of proper polarity and magnitude is applied to the pixel electrode relative to the ground plane electrode.

Abstract: A technique for fabricating a patterned conductor on the inner surface of a transparent tube comprises providing a source of conductive material inside a hollow tube and directing actinic radiation onto the tube wall where the deposition of a conductive pattern is desired to deposit conductive material thereon. That conductive deposit may be thickened by subsequent electroless or electroplating. The result is an improved magnetic resonance sensor comprising a hollow tube having "flat" conductor coils disposed on its interior surface.

Abstract: A preamplifier interfaces low level current-mode signals, such as from a photodetector in a computerized tomography system, to a corresponding voltage-mode signals, with a dynamic range on the order of 120 dB. The preamplifier can be implemented in CMOS technology to allow for complete integration of the computerized tomography interface function, including analog-to-digital conversion, of several channels in a single integrated circuit. The CMOS circuit accepts a current signal at its input and, after integration of the signal, produces a voltage output wherein the low frequency noise that is normally encountered with MOS transistors is cancelled through the use of correlated-double sampling. The circuit limits high frequency noise through use of low-pass filtering.

Abstract: Linear combining apparatus for digit-serial data performs addition, subtraction and comparison functions on a systolic basis. Signals are afforded the apparatus indicating the occurence of the most significant digits of the digit-serial signals being linearly combined.

Abstract: An oversampling converter of a type using a plural-order, plural-stage sigma-delta modulator, the output signal to the decimating filter of which modulator has the quantization noise contribution of a number of its plurality of stages suppressed therein, uses single-bit quantization in those stages, and the modulator uses single-bit quantization in those stages. Those stages each employ digital-to-analog converters with single-bit resolution in their feedback connections to avoid non-linearity problems. Another sigma-delta converter stage, the quantization noise of which appears in substantial amount in the converter output signal to the decimating filter, uses quantization having multiple-bit resolution to help increase the resolution of the oversampling converter overall.

Abstract: There is provided a curable substantially uniform mixture of an epoxy silicone, polyarylonium salts and a compatibilizer in the form a mixture of a long chain alkyl substituted phenol and an alkane diol. The curable mixture is convertable to a non-toxic, tack free adherent release coating for pressure sensitive adhesives.

Abstract: A self aligned method of fabricating a vertical channel insulated gate semiconductor device comprises providing a first layer of one type conductivity atop a partially processed wafer. A first protective layer is disposed over the first layer and a window is opened therethrough. A first region can be established through the first window and in the first layer. A trench is established through the first window, and extending entirely through the first region and first layer, into the partially processed wafer. An insulated gate is established in the trench to control the drift region electric field under reverse bias operation.