Abstract: An aqueous autocatalytic electroless gold plating composition having improved stability and which can plate gold directly onto gold or on nickel at an excellent rate is provided, the composition having a pH within the range of about 10 to about 14 and comprising about 0.002 to about 0.02M of a water-soluble alkali metal monovalent gold cyanide complex, about 0.01 to about 0.1M of a water-soluble alkali metal cyanide, about 0.1 to about 1.0M of a carbonate compound, about 0.01 to about 0.1M of a first reducing agent selected from the group consisting of water soluble alkali metal borohydrides and water soluble amine boranes, and about 0.01 to about 1.0M of a second reducing agent selected from the group consisting of hydrazine and hydrazine derivatives.

Abstract: An MOS device, for self-protection from overvoltages and for protection of another circuit or component in some applications, has a semiconductor substrate which includes a drain region with a plurality of base regions disposed therein. Source regions are diffused into at least one of the base regions; at least one base region does not require any source regions and defines a sourceless base region. A diode junction, formed between the sourceless base region and the abutting drain region, undergoes junction breakdown at an avalanche voltage level chosen to cause voltage breakdown to occur between a second electrode and a gate electrode at a lower voltage level than a breakdown voltage level present between the second electrode and the first electrode when the chosen avalanche level is exceeded by a voltage applied to the device or the protected component.

Abstract: Alloy compositions suitable for use in protecting refractory base alloy compositions are disclosed. The coating is formed of an alloy containing chromium, ruthenium and aluminum and which may contain iron, cobalt and nickel. The coating is found to be highly resistant to oxidation.

Abstract: The adherence of the alignment layer of a liquid crystal cell is improved by simultaneously glow discharging and sputtering the alignment materials onto the conductors and substrates of the liquid crystal cell.

Abstract: Spiro(bis)indane polycarbonates, including homo- and copolycarbonates, are devolatilized by extrusion under conditions of low viscous dissipation and low residence time. By this method, volatile impurities including spiro(bis)indane cyclic dimer may be removed.

Abstract: An apparatus and process for the construction of a cruciformed section control rod is disclosed. The control rod is characterized by having square exterior sectioned tubes with central cylindrical volumes for the containment of neutron absorbing poisons. In the process, these tubes are welded together at the corners of the square sections to form the planar members of the cruciformed shaped rods. An apparatus and process is disclosed in which the rods are all held by a jig in the same configuration as is ultimately fabricated. Thereafter, the jig is drawn through fixtures, which fixtures accurately guide the rods to be joined by welding past paired and opposed laser welding heads. By the expedient of positioning the laser and rapidly drawing the braced together tubes by the laser, control rod fabrication occurs. There results a solid, integral control rod constituting a suitable pressure vessel for neutron absorbers for control of nuclear reactions.

Abstract: An X-ray imaging system includes an X-ray tube which emits X-rays that are converted to visible light image by an image intensifier. This system can be operated in either a fluoroscopic mode in which the visible light image is viewed by a video camera and displayed on a monitor, or a film camera mode in which the visible light image is recorded on film. The X-ray system is calibrated for a selected fluoroscopic dose rate by producing an exposure and sensing the current through a photocathode of the image intensifier. The actual dose rate is derived from the sensed photocathode current. The excitation of the X-ray tube is the adjusted until the actual dose rate is within a given tolerance range of the selected dose rate. The system parameters are then stored for use when the same dose rate is selected again. Parameters for other selectable fluoroscopic dose rates are calculated from the stored parameters. The dose rates for the film camera mode then are calibrated using a fluoroscopic mode exposure.

Abstract: An apparatus for combining a liquid chromatograph and a mass spectrometer is described. The liquid chromatograph elution solvent is removed and sample particles are carried to the mass spectrometer relatively free of solvent.

Abstract: Polyphenylene ethers are capped by reaction in the melt with at least one derivative of 3-hydroxytrimellitic acid, preferably the 5-hydroxy or 5-acetoxy derivative of trimellitic anhydride or of a monoester thereof. The capped polyphenylene ether is capable of forming copolymers with polyamides.

Abstract: This luminaire comprises a reflector for receiving a lamp, an opening in the reflector through which light from the lamp is reflected, and a closure removably secured over the opening. Within the luminaire is an energizing circuit for the lamp, and connected within this circuit is a pair of disconnect contacts that are separable to preclude energization of the lamp via the energizing circuit. Actuating means for the disconnect contacts is operable to effect separation of the contacts in response to removal of the closure from its normal position covering the opening. This actuating means includes a plunger of electrical insulating material disposed between the light-transmitting material of the closure and one of said disconnect contacts.

Abstract: Compositions comprising polyphenylene ether copolymers are prepared by blending, preferably in the melt, a functionalized polyphenylene ether with a graft polymer, which is in turn prepared by the free radical reaction of a base polymer such as polyethylene or polypropylene with an olefinic compound containing a tertiary alkyl ester group, which may be a simple carboxylic acid or a carbamic acid ester group. The t-butyl groups are removed by thermal degradation under the reaction conditions to yield a carboxylic acid- or amino-functionalized graft polymer which reacts with the polyphenylene ether.

Abstract: By reconciling differences between the estimator and the filter of a code excited linear predictive (CELP) voice coder, higher quality is achieved in the output speech. The pulse amplitudes and pitch tap gain are solved for simultaneously to minimize the estimator bias in the CELP excitation. Increased signal to noise ratio is accomplished by modifying the pitch predictor such that the pitch synthesis filter accurately reflects the estimation procedure used to find the pitch tap gain, and by improving the excitation analysis technique such that the pitch predictor tap gain and codeword gain are solved for simultaneously, rather than sequentially. These modifications do not result in an increased transmission rate or significant increase in complexity of the CELP coding algorithm.

Abstract: A MOS-pilot structure for an IGT device consisting of a multiplicity of IGT cells interconnected in a lattice network includes a plurality of pilot emitter electrodes each in electrical contact with only at least one pilot emitter region of a first plurality of the multiplicity of IGT cells and electrically isolated from a common cathode electrode of the multiplicity of IGT cells. The plurality of pilot emitter electrodes are each electrically connected to a contact metal strip deposited on the substrate surface and spaced therefrom by a layer of insulation. The contact metal strip is connected to ground potential through a sense resistor for producing a sense voltage responsive only to the channel currents flowing through the at least one pilot emitter regions; therefore, a MOS pilot structure that utilizes only the MOS channel current to produce the sense voltage to cause turn-off of the IGT device at a large total current is disclosed.

Abstract: Pellet trays bearing rows of fuel pellets of known enrichment concentrations are retrieved from selected storage elevators and successively conveyed to a zone makeup machine. Parallel rows of pellets are raked from each tray and advanced over a longitudinally elongated, grooved loading surface into abutment with a selectively longitudinally positioned stop. A zone makeup carriage makes up the pellet rows to a prescribed, common zone length, which are then weighted and advanced in parallel by a vibratory loader into a plurality of cladding tubes arranged in parallel loading positions by tube handling apparatus. Overall operation is coordinated by a system controller to concurrently load the cladding tubes with multiple pellet zones of varying enrichments and lengths in automated fashion.

Abstract: Macrocyclic oligomers, including polycarbonates, polyesters, polyamides, polyimides, polyetherketones and polyethersulfones, are conveniently prepared from various spiro(bis)indane compounds, especially the 6,6'-difunctional 3,3',3'-tetramethylspiro(bis)indanes. The macrocyclic oligomers may be conveniently converted to linear polymers.

Abstract: An improved dry-feeling antiperspirant composition is provided which comprises an aqueous solution of an astringent emulsified in a volatile silicon fluid, the emulsion being stabilized by a combination of a long-chain alkyl modified polysiloxane-polyoxyalkylene copolymer and an organic surfactant having an HLB value from 8 to 18.

Abstract: An integral transfer tube is produced comprised of a hollow high density ceramic oxide tube having its outer surface wall surrounded by a low density multilayered ceramic oxide shell, and having a heating element comprised of a heating wound portion and two end portions wherein the wound portion is intermediate the tube and the shell, and wherein at least a sufficient amount of the end portions are exposed for electrical attachment.

Abstract: A handle interlock arrangement is attached to the top surface of a manually operable circuit breaker operating handle to prevent the handle from being locked in its "OFF" position when the circuit breaker contacts are actually in their closed condition. A handle cover is hingeably attached to the circuit breaker cover and includes a pair of apertures arranged through the opposite sidewalls of the cover. The location of the apertures relative to the circuit breaker operating handle prevents the insertion of a padlock through the apertures when the circuit breaker operating handle is in its "ON" position.

Abstract: Disclosed is an electrode probe for employment in monitoring electrochemical potentials and which has a robust structure particularly suiting it for employment within the rigorous environment of the reactor core of a nuclear power facility. The electrode of the present invention is comprised of four major segments: a metal cap electrode, an alumina retainer, an annular metal sleeve, and a positioning and signal transfer assembly. The metal cap electrode has a tip portion and an annulus extending therefrom which defines a cavity having an interior surface. The alumina retainer has a base region with a sleeve attachment surface, an oppositely disposed cap securing portion nestably disposed within said cap electrode cavity and sealingly attached thereto. The retainer further has an axis channel penetrating therethrough from the base region to the cap securing portion.

Abstract: A vectorable gas turbine engine exhaust nozzle including deployable angled flow deflectors for providing thrust vectoring in the yaw direction. In one embodiment the deflectors are pivotally deployed in the diverging section of a two dimensional nozzle with the use of either electromechanical or pneumatic rotary actuators. The deflectors are preferably employed in a two dimensional convergent divergent exhaust nozzle which includes a means for varying the size of the throat and a means for providing pitch thrust vectoring.

Abstract: A microfocus X-ray tube has an anode that emits X-rays and, a biproduct of its waste heat, visible and near infrared light. This invention uses the biproduct light to adjust and maintain the focus of the electron beam and enhance the performance of the X-ray tube as a point source of X-rays. Only the light is reflected by a mirror along a path in which a viewport is placed in the tube envelope. An sensor, e.g., a photodiode, or television camera, is placed in the path. A display means, e.g., a television display, meter, etc., can be connected to the sensing means to display the emitting spot of the anode or the amplitude of the emission. The focus of the X-ray tube is assured by observing the biproduct light and adjusting the electron beam to either minimize the size of the glowing spot or maximizing its apparent brightness. A method for use with an emitter of first and second types of radiation comprises reflecting only the second type of radiation, and sensing the reflected radiation.

Abstract: Impact- and solvent-resistant resin blends are prepared from a polyphenylene ether, or blend thereof with a polystyrene, a linear polyester such as a poly(alkylene dicarboxylate), at least one elastomeric polyphenylene ether-compatible impact modifier and at least one polymer containing a substantial proportion of aromatic polycarbonate units as a compatibilizing agent. There may also be present a minor amount of at least one epoxide and/or masked isocyanate such as triglycidyl isocyanurate or a glycidyl methacrylate polymer. The polyphenylene ether is preferably inactivated by reaction with at least one non-volatile carboxylic acid or anhydride and/or by extrusion with vacuum venting.

Abstract: An aqueous autocatalytic electroless gold plating composition having improved stability and an excellent plating rate is provided which comprises about 0.002 to about 005M of a water-soluble alkali metal monovalent gold cyanide complex, about 0.01 to about 0.1M of a water-soluble cyanide compound, about 0.1 to about 1.0M of a carbonte compound, and about 0.01 to about 0.1M of a reducing agent selected from the group consisting of water soluble alkali metal borohydrides and water soluble amine boranes, the plating composition having a plating rate within the range of about 10 to about 14.

Abstract: A mammograph is made, wherein the X-ray tube and the work top are held facing each other by a stirrup, making it easy for an X-ray technician to reach the breast to be X-rayed. The stirrup is shaped like a ring and can rotate on itself in sliding on a complementary ring, so as to reduce the inertia of the movable masses, to bring about radiography under oblique or even horizontal incidence. Furthermore, the structure is preferably moved away from a control cabinet for the mammograph, to enable an X-ray technician to come between this cabinet and the patient so as to facilitate preparations for taking a picture.

Abstract: The heat transfer coefficient distribution on the surface of a component is measured by removing a predetermined amount of material from the surface of the component and replacing it with an insert comprising a layer of low thermal conductivity material, an array of temperature sensors, and a heater. The heat transfer coefficient is determined by applying a known amount of heat flux to the component by way of the heater and sensing the outputs of the temperature sensors. This procedure is carried out on actual hardware rather than on simplistic scale models of hardware.

Abstract: An interlock system acts in conjunction with an arrangement in which selected ones of first and second pluralities of equipment for conveying chemicals are interconnected in accordance with a chosen operation of a process or apparatus. A separate information carrier corresponds to each piece of equipment of the first plurality and a control unit corresponds to each piece of the second plurality. The interlock system establishes an appropriate set of operating parameters for the chosen operation when the information carrier which corresponds to the interconnected first piece of equipment engages the control unit corresponding to the interconnected second piece of equipment.

Abstract: A power monitor, for determining real and imaginary power associated with one or more line signals, samples a plurality of line cycles during an observation window to generate a plurality of voltage-current sample sets for each line cycle. The sampling of the sample sets is timed such that the voltage-current sample sets are taken at different relative time positions. The power monitor stores incoming voltage-current sample data in one memory area and concurrently analyzes sample data already stored in another memory area. Deletion of sample data is not permitted until transient analysis of such data is complete.In another embodiment, the power monitor includes a working data memory area coupled to the sampling circuitry such that the sample sets occurring during each observation window are stored in the working data memory area in interleaved fashion to simulate a single cycle of data.

Abstract: A method of altering the crystal form of an alloy is disclosed. To accomplish this change in crystal form, the concentrations of the more volatile constituents of the alloy are reduced and the concentration of the less volatile constituents is increased on a relative basis. The process may be carried out in forming a reinforced structure. For this purpose, an improved reinforced matrix and a method of forming it are taught. The reinforcement may be silicon carbide filaments or other reinforcing filaments. The matrix is a titanium 1421 alloy nominally containing 14 weight percent of aluminum and 21 weight percent of niobium. The matrix is formed by plasma-spray forming a powder of the alloy to impart to the alloy particles a superheat during the plasma-spraying as the particles traverse the plasma plume. As a result of the superheat, the alloy is changed in its composition to reduce the aluminum concentration and to increase the niobium and titanium concentrations on a relative basis.

Abstract: A composite target for an x-ray tube has a graphite substrate portion and a metal portion, the two portions being bonded together by a platinum braze. A tantalum wetting agent layer on the graphite acts to improve the bond by causing the platinum to better wet the graphite portion.

Abstract: A system for encoding a progressive scan widescreen EDTV signal so as to be compatible with a standard NTSC receiver develops an auxiliary signal containing vertical-temporal information derived from image frame difference information of the progressive scan signal. The auxiliary signal facilitates the conversion of the encoded NTSC compatible signal to pro-scan format in a widescreen progressive scan receiver.

Abstract: Apparatus and method for controlling a motor having a stationary assembly with a plurality of winding stages for carrying motor current and further having a rotatable assembly in driving relation with a blower in an air handling system. The apparatus provides control of the blower speed over a range of static pressure variations to maintain relatively constant preselected rate of air flow in the system. The apparatus receives a preselected flow rate signal representing the preselected air flow rate. A microprocessor, responsive to both the preselected flow rate signal and a speed signal, generates a desired torque signal which is a function of both the preselected flow rate signal and the speed signal. The desired torque signal is compared to a signal representing motor torque and a comparison signal representing the comparison is generated.

Abstract: There is provided a process for producing low molecular weight silanol end-stopped diorganopolysiloxanes containing an average of 3 to 10 diorganosiloxy units and averaging 5 diorganosiloxy units comprising contacting a cyclic trimer of the formula:(R.sup.2 SiO).sub.3where R.sup.2 is a halogenated monovalent hydrocarbon radical and R is selected from the class consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals with a mixture comprising an aprotic solvent and water and separating the desired product after the hydrolysis.

Abstract: A gas turbine engine having a core for generating combustion gases, a power turbine, an unducted fan section and a booster compressor. The power turbine includes two counterrotating turbine blade rows which are interdigitized and serve to rotate counterrotating first and second drive shafts, respectively. The unducted fan section also includes counterrotating spaced apart variable pitch fan blade rows which are respectively connected to the first and second drive shafts. A booster compressor is axially positioned between the spaced apart fan blade rows. The booster compressor likewise includes first and second blade rows which are counterrotating and interdigitated and are likewise driven by the first and second drive shafts. The engine is supported by two stationary support frames to permit the nacelle to be nonstructural. The core engine is a modular unit so that it can be separable from the rest of the engine.

Abstract: Epoxy functional organopolysiloxanes are compatibilized with onium salt photocatalysts by modifying a controlled number of epoxy groups by esterification with carboxylic acids.

Abstract: Sodium fluorosilanolate catalyst is disclosed which has improved effectiveness as a catalyst to produce fluorosilicone polymer and which at the same time improves fluorosilicone polymer purity.

Abstract: A deployable crossed log periodic dipole array is made up of a plurality of bays spaced along a feed transmission line arrangement. Each bay includes a support centered on the array axis. Each bay also includes as antenna elements four long, straight, flat or slightly bowed springs or spring-like tape elements, each fastened at one end to a transmission line conductor. A retainer associated with each bay is rotatable about the cylindrical support and engages the spring elements, so that rotation of the retainer winds the spring elements against the spring resistance and stores energy therein. A locking arrangement simultaneously engages or disengages all the retainers. Simultaneous unlocking of the retainers allows the springs of all the bays to rotate the retainers and to unwind. As the springs unwind, they deploy. The transmission line arrangement includes two open two-wire transmission lines on a common axis. To reduce torques during deployment, each bay contrarotates relative to an adjacent bay.

Abstract: A refrigerator cabinet having an outer metal shell and an inner liner spaced from the shell with foamed-in-place thermal insulation therebetween. The cabinet has an outer metal shell open at the front with two side walls and a top wall each folded to provide a front face with an open fold behind the front face. There is a machinery compartment wall near the bottom of the refrigerator cabinet which is bent upwardly and terminates in a curved front lip having a downwardly facing opening. The inner liner has a peripheral flange which is received in the open fold behind the front face along the side and top walls. At the bottom of the cabinet is a bottom rail assembly which includes a metal cross member with each end secured to the front face at each of the side walls. The metal cross member has a strengthening groove extending between the ends and also has two spaced tabs formed to project downwardly into the groove.

Abstract: A polymer attenuation filter in a CT machine is mounted at its center and allowed to expand freely at its ends to prevent cracking of the filter as it expands with temperature and after it becomes brittle with x-ray exposure. Vertical expansion of the filter at its center is accommodated by a stress relief hole cut between the center fastening points. Relatively greater horizontal expansion is accommodated by means of spring clamping. Difference in expansion between a metallic strip filter and its support is accommodated by tightly affixing the ends of the filter to the support so that the metallic strip is always under tension and cannot buckle.

Abstract: Objectionable noise in a rotary compressor is reduced by placing cavities in the sliding vane and/or the rolling piston. The cavities are used to change the local compliance of surfaces which impact one another to generate the objectionable noise. The change in the compliance of impacting surfaces is used to change the frequency of the noise generated by the impacting surfaces.

Abstract: A double-sided printed circuit board includes a component side and a circuit side. The dielectric material is undesirably flexible. To render the board rigid, the conductor bonded to the component side is a rigid plate. At locations at which plated-through component signal leads are to be attached, lead clearance holes are drilled through all the way through the thin conductor, the dielectric, and the plate. The holes are plated with conductor. From the exposed side of the plate, larger holes are drilled coaxial with the clearance holes, part-way through the plate. The hold bottoms make an acute angle with the axes. The exposed surfaces are plated with etch resist. A second depth-controlled drilling coaxial with the first is performed with a drill which has a reverse-angle face, to a depth which extends almost through the plate, to thereby remove etch resist in an annular region surrounding the original clearance hole.

Abstract: A graphical image display provides improved image presentation due to potential removal of background data which would otherwise degrade presentation of the region of interest and due to automatic adjustment of image brightness and contrast based on operator preference. Statistical analysis of the image data is employed. The invention is particularly useful in medical diagnostic imaging.

Abstract: A carbureting device for the combustor of a gas turbine comprises an annular spin chamber which is defined by a generally annular housing having a closed forward end, an exhaust tube which is partially disposed within the spin chamber, and a flange disposed around the exhaust tube. A swirling air entrance is disposed between the annular housing and the flange and a fuel entrance is disposed along the annular housing spaced axially forward of the swirling air entrance. In one embodiment of the invention the exhaust tube is a venturi. In another embodiment a fairing is disposed outside and aft of the spin chamber and is sized and disposed about and extending at least to the end of the venturi, thereby forming a passageway between the fairing and the venturi. A second air swirling means is disposed in the passageway formed by the fairing and the venturi.

Abstract: An electric circuit breaker enclosure includes a pultruded glass-filled plastic inset for added strength to the line and load terminal straps. The line and load terminal straps are fastened to the inset on the side and receive the corresponding line and load terminal cables on an opposite side thereof. The inset allows connection within a high-rated electrical power distribution circuit without damage to the circuit breaker case upon short circuit interruption.

Abstract: A magazine is provided with anti-syphon members, mounted atop the partitions of a multi-bay magazine, which operate in conjunction with drag-reducing rollers to prevent spurious syphoning movements of an ammunition belt from one bay to an adjacent bay as the belt is being withdrawn from the latter to a magazine exit port. To provide for bidirectional ammunition belt withdrawal, the anti-syphon members are pivotally mounted in pairs operating to permit belt withdrawal from the bays over the rollers and directly to an exit port, while inhibiting syphoning belt movements from bay to bay.

Abstract: An apparatus and process for the accurate measurement and calibration of core flow in a boiling water reactor is disclosed. The reactor includes a pressure vessel having internal forced circulation through the core. An annular downcomer region establishes reactor coolant flow downwardly in the periphery of the reactor vessel and finally upwardly and centrally into the core across a core plate. A pressure sensor detecting the pressure differential across the core plate is utilized. This pressure sensor has its measurement enhanced by input from local power range monitors in the core to utilize both the sensed pressure differential and the power to predict more accurately flow in the reactor. An algorithm is developed for utilizing the pressure differential and the real time readings from the local power range monitor to accurately gauge overall reactor coolant flow. To ensure accurate calibration, two calibration standards are itilized at steady states of reactor power output and coolant flow.

Abstract: A spark gap device is disclosed that is particularly suited for a rapid restrike or starting circuit which is employed in sport stadium lighting applications to start or restrike metal halide lamps that have been subjected to a momentary loss of power. The spark gap device comprises two electrodes that are arranged in a parallel side-by-side relationship and spaced apart from each other by a predetermined amount. The spark gap device operates that when a high voltage potential is applied across the electrodes, the generated and reoccuring spark is distributed along the parallel arranged electrodes. The parallel arrangement of electrodes provides for improved life and cooler electrode temperatures as compared to prior art spark gap devices in which the generated and reoccuring spark jumps between the end regions of separated electrodes.

Abstract: Curable compositions containing a reaction product of at least one bisphenol polyglycidyl ether, at least one epoxidized novolak and at least one brominated bisphenol, in combination with a polyphenylene ether and further components including specific catalysts and hardeners, may be used in the preparation of laminates useful as printed circuit boards and having excellent physical and electrical properties.

Abstract: A low alpha-particle-emitting ceramic composite cover which when used in a ceramic integrated circuit package to encapsulate an integrated circuit device, reduces soft errors caused by alpha-particles emitted from the ceramic material. An alpha-particle-absorbing barrier layer is attached to the major portion of the interior surface of the ceramic cover to absorb alpha-particles emitted by the ceramic material. The barrier layer may be an organic polymeric material or an inorganic high purity material. Preferably the barrier layer is a polyimide film which is attached to the ceramic cover by a glass sealant material. Various constructions of the composite cover and ceramic integrated circuit packages utilizing the composite cover are disclosed.

Abstract: The invention relates to holography and more particularly to an electronic holographic apparatus whose electrical output represents the magnitude and phase of coherent light reflected from a three-dimensional object and distributed over the aperture of the apparatus. The apparatus provides a coherent beam which illuminates the object to create a speckle pattern in an aperture bounding an optical sensing arrangement. A reference beam derived from the same source as the illuminating beam illuminates the sensing aperture directly and creates fringes in the speckle pattern. The optical sensing arrangement consists of a charge injection device (CID) camera with plural optical detectors arranged in relation to the speckle pattern to sense the magnitude and spatial phase of each speckle (on the average).