Abstract: A method for accurately sizing and forming the cooling holes of an air-cooled gas turbine engine component on which a protective diffusion coating will be deposited. The method generally entails drilling a hole in a surface region of a substrate, and then measuring the thickness of any recast surface region surrounding the hole and created as a result of a portion of the surface region having melted and then resolidified. The thickness of the additive layer of the diffusion coating that will deposit on a corresponding recast surface region of the component is then predicted based on an inverse relationship determined to exist with the thickness of the recast surface region formed during drilling of the cooling hole. An appropriately-oversized hole can then be formed in the component so that, after depositing the diffusion coating on the component, the additive layer grows sufficiently within the hole to yield a cooling hole approximately having the required final diameter.

Abstract: To provide a method with which a polycarbonate can be manufactured efficiently without any pipe clogging or foreign material admixture in the course of the continuous manufacture of a polycarbonate. A continuous method for manufacturing a polycarbonate, characterized in that, in the continuous manufacture of a polycarbonate by transesterification from a dihydroxy compound and a carbonic diester, the crystallization of a polycarbonate lower polycondensate produced in the intermediate stage of a polycondensation reaction whose intrinsic viscosity (IV) measured at 20° C. in methylene chloride is between 0.1 and 0.4 dL/g is suppressed by setting the temperature to be at least 230° C. on the surface of the reactor equipment in contact with the polycarbonate lower polycondensate.

Abstract: A circuit breaker operating mechanism for separating a pair of electrical contacts within an electrical circuit breaker includes a lower link operatively connected to one of the electrical contacts. An upper link includes first and second legs extending from a central portion. The first leg is pivotally secured to the lower link, and the second leg includes a cam surface formed thereon. A roller is in intimate contact with the cam surface, and the cam surface is configured such that movement of the upper link relative to the roller causes the upper link to pivot about the central portion. Pivoting of the upper link about the central portion moves the lower link causing the second contact to move away from the first contact. A mechanism spring is configured to provide a force for separating the electrical contacts when the operating mechanism is tripped. A toggle handle includes a void disposed therein, and an end of the spring is secured to the operating handle within the void.

Abstract: A segmented turbine cooling component, such as shroud segment for the high pressure and low pressure turbine sections of a gas turbine engine, useful in providing preferential cooling to the side rails or panels of the turbine component through the combination of cooling air fed into the intermediate pressure cavity between the discourager and primary seals and then through recesses in the bottom wall of the lower discourager seal slot that impinges air on the portion of the side panel below the discourager seal. The side panels of the turbine component have an upper primary seal slot and a lower discourager seal slot with a bottom wall having a plurality of alternating lands and recesses along the length thereof and a plurality of cooling air passages having outlets exiting into the lower slot above the lands.

Abstract: A hybrid combustor, for providing stable high and low levels of operation while minimizing emissions of NOx, CO, and UHCs, includes a casing having a chamber, a catalytic combustor disposed in the chamber, and a non-premixed combustor disposed in the chamber. The hybrid combustor may comprise a fuel nozzle comprising a casing having a chamber, and a body supportable in the chamber to define a passageway between the body and the casing. The passageway has an inlet for receiving a stream of air and an outlet for discharging a stream of fuel and air, and the body includes a tapering downstream portion. Desirably, flow separation of the fuel and air mixture from the body (i.e., recirculation of the fuel and air mixture in the passageway and/or chamber) is inhibited whereby a generally uniform fuel and air mixture is provided.

Abstract: Brine produced in an interfacial polycarbonate plant can be treated to render it useful for recycle to the electrolytic cell, which is used in the production of chlorine. The waste brine stream is combined with ozone to produce an ozonated brine in which the amounts of organic contaminants such as phenol, bisphenol A and chloromethyltrimetlhyl ammonium chloride is reduced. The ozonated brine is then acidified to remove carbonates and produce a decarbonated brine which is then concentrated to produce a treated brine in which the concentration of NaCl is at least 10 wt % NaCl. A filtration step may be included prior to the ozonation to remove particulate impurities. When used in an interfacial polycarbonate plant in combination with chlorine, phosgene and polycarbonate producing facilities, this allows recycling of the brine waste stream and this provides an environmentally superior and highly cost effective method for the producing polycarbonate.

Abstract: A process is described for purifying acetone from a crude acetone-phenol mixture produced upon oxidizing cumene. In the process, an alkaline agent and an oxidizing agent are both added to the mixture to help remove aldehyde contaminants upon purification.

Abstract: A nozzle vane or airfoil structure is provided in which the nozzle ribs are connected to the side walls of the vane or airfoil in such a way that the ribs provide the requisite mechanical support between the concave side and convex side of the airfoil but are not locked in the radial direction of the assembly, longitudinally of the airfoil. The ribs may be bi-cast onto a preformed airfoil side wall structure or fastened to the airfoil by an interlocking slide connection and/or welding. By attaching the nozzle ribs to the nozzle airfoil metal in such a way that allows play longitudinally of the airfoil, the temperature difference induced radial thermal stresses at the nozzle airfoil/rib joint area are reduced while maintaining proper mechanical support of the nozzle side walls.

Abstract: A process for producing high sinter density UO2 powder from UO2-containing scrap powder material, wherein the scrap material is oxidized at low temperature and the resulting U3O8 powder is reduced at a higher temperature which is than about to 800° C. to produce UO2 having high sinter density and high surface area.

Abstract: A method comprising (a) synthesis of a poly(arylene ether) having the structure (1) wherein m is an integer having an average value in the range from about 3 to about 300; (b) solution functionalization of polymer (1) to form functionalized poly(arylene ether) having the structure (2) wherein X is a reactive functional group selected from the group consisting of anhydride, hydroxyl, epoxy, carboxyl, —R1OH, R1CO2R2, —R1CH2═CH2, or vinyl, wherein R1 is a primary or secondary divalent alkyl or haloalky group having from 1 to 20 carbons, or an aryl group and R2 is a primary or secondary alkyl group having from 1 to 10 carbons; and Q4 is hydrogen, X, or a mixture thereof; (c) reaction of functionalized poly(arylene ether) (2) with a poly(organosiloxane) having structure (3): wherein x is zero or one and Y is a functional group reactive with X, selected from the group consisting of —OH, —CH2═CH2, epoxy, amino, carboxy, &mdash

Abstract: A compressor casing includes an axially convex inner surface for surrounding a row of rotor blades with radial gaps therebetween. The tip of the blades complement the casing contour for reducing blade tip losses and flow blockage.

Abstract: A cooling gas ventilation circuit is provided for an end winding of a rotary machine having a rotor of the type having a plurality of radial slots and a plurality of coils respectively seated in the radial slots, the coils extending beyond a pole face of the rotor to form the end winding. The ventilation circuit is composed of first and second cooling gas passages, respectively defined in at least one turn of each coil of the end winding. Each first cooling gas passage extends from an inlet port in communication with a cavity on one longitudinal side of the turn to an exit port defined on the other longitudinal side of the turn. Each second cooling gas passage extends from an inlet port in communication with the cavity on the one longitudinal side of the turn to an outlet in the form of a radial chimney defined through a plurality of the turns of the coil within the respective radial slot.

Abstract: A method of preparing cellular pellets from a prepolymer comprising a blowing agent, the method comprising the steps of: a) extruding the prepolymer through a die, the die maintained at conditions such that the blowing agent remains in the condensed phase in the prepolymer prior to emerging from the die, and b) upon emergence of the prepolymer through the die, substantially simultaneously cooling the prepolymer by contacting the prepolymer with a cooling agent and cutting the prepolymer; the conditions outside the die being maintained such that the blowing agent vaporizes in the prepolymer to form pores.

Abstract: Improved cooling is achieved in a cooking appliance including a burner box having at least one burner assembly disposed therein. A control box containing control electronics is spaced below the burner box so that a gap is created between the burner box and the control box. A plurality of fins is formed on at least one wall of the control box for cooling the control electronics by natural convection.

Abstract: An inspection apparatus includes a component engagement apparatus, a detection apparatus, and a movement apparatus and is controlled by a cam. A drawer is slidably attached to the component engagement apparatus to receive and align a component including a TV-shaped opening. The detection apparatus is sized to receive an eddy current probe and is attached to the movement apparatus with an adjustable fixture. The movement apparatus identifies a relative position of the eddy current probe in relation to the TV-shaped opening being inspected and guides the movement of the detection apparatus.

Abstract: A method of forming cooling holes in a gas turbine engine component. The method includes the steps of forming a hole in the component extending between a first surface of the component and a second surface of the component opposite the first surface and supplying pressurized air to the hole from the second surface of the component. The method also includes the step of sensing a parameter representative of air flow through the hole. Further, the method includes enlarging the hole until the sensed parameter represents a preselected air flow rate through the hole.

Abstract: A fan blade includes an airfoil having a root and an integral platform. The platform includes forward and aft ends and arcuate first and second sides therebetween. The airfoil root is laterally offset closer to the platform first side than the second side. Impact loads with a trailing blade during a blade-out failure are accordingly distributed for reducing peak loading in the trailing blade and damage thereto.

Abstract: A method and apparatus for switching an AC motor between two power supplies such as supply mains and a variable frequency AC motor drive. In a transfer procedure, the motor drive is coupled to the motor to power the motor. When the supply main is connected to the motor, a resulting current spike in the output of the motor drive is detected to disconnect the motor drive from the motor very quickly while limiting current. In a capture procedure, both power supplies are coupled to the motor with the motor drive in an idle mode. When the supply mains are disconnected from the motor, the voltage change in the output of the motor drive is detected to quickly activate the motor drive to power the motor.

Abstract: The manufacture of polycarbonates can be accomplished via an ester interchange reaction of a dihydroxy compound and a carbonic acid diester. The method, which can be a single or multi-stage process wherein the total amount of alkali metal compounds and alkaline earth metal compounds contained as impurities is 1×10−7 moles or less per mole of dihydroxy compound used as raw materials, and the catalyst employed is an ammonium and/or phosphonium compound, a compound which decomposes or volatilizes at a temperature of 100 to 300° C., and/or an alkali metal phosphorous containing inorganic salt and/or alkaline earth metal phosphorous-containing inorganic salt.

Abstract: An eddy current inspection probe for inspecting a preselected surface at least partially defining an opening in a component. The eddy current inspection probe includes a core moveable between a retracted position and an expanded position in which the probe is sized and shaped for at least partially filling the opening and contacting the preselected surface for inspecting the surface. The probe includes a compliant covering positioned over the exterior surface of the core and an eddy current array positioned over the outer face of the covering. Further, the probe includes an element positioned between an exterior surface of the core and an inner face of the covering having a coefficient of friction selected to permit the inner face of the covering to move tangentially with respect to the exterior surface of the core as the core is moved from the retracted position to the expanded position to ensure intimate contact between probe and the preselected surface of the component being inspected.