Abstract:
The present invention provides a novel compound represented as formula (I). The present novel compound is prepared by reacting fluorine with pyridine-boron trifluoride and is useful as a fluorinating agent in the fluorination of organic compounds.
Abstract:
A lanthanum chromite ceramic powder mixture that consists essentially of 1 mol of LaCr1-xMxO3, where M is a divalent metal selected from the group consisting of magnesium, calcium and mixtures thereof and x ranges from 0.03 to 0.3; y mols of B2O3, where y ranges from 0.005 to 0.04; and z mols of La2O3, where the ratio z/y ranges from 1.1 to 3. The mixture is formed into powder compacts and sintered to near full density at temperatures as low as 1400 °C.
Abstract translation:本发明涉及亚铬酸镧陶瓷粉末的混合物,其基本上由1摩尔LaCr1-xMxO3组成,其中M是选自镁,钙及其混合物的二价金属。 ci和x在0.03和0.3之间; y摩尔的B 2 O 3,其中y在0.005和0.04之间; 和z摩尔的La 2 O 3,其中z / y比在1.1和3之间。该混合物以粉末片剂的形式生产并且在低至1400℃的温度下烧结,直到 几乎完全紧凑。
Abstract:
A compliant foil bearing disposed between shaft (12) and bushing member, and including a plurality of circumferentially arranged and overlapping foil elements (20) mounted to said bushing member and having a thickness, each foil element having a radially inwardly disposed surface portion confronting said shaft member and defining therewith in operation of said bearing a variable radial spacing dimension, each foil element (20) with a next adjacent foil element overlappingly defining a circumferentially extending gap of radial spacing dimension discontinuity according to said thickness; a like plurality of circumferentially arranged underspring elements (22) also mounted to said bushing member; and means for decreasing the circumferential extend of said gap.
Abstract:
The present invention provides compositions comprising about 0.4 to about 79.6 weight percent 1,1-dichloro-1-fluoroethane, about 0.4 to about 79.6 weight percent dichlorotrifluoroethane selected from the group consisting of 1,1-dichloro-2,2,2-trifluoroethane, 1,2-dichloro-1,1,2-trifluoroethane, and mixtures thereof, and from about 5 to about 20 weight percent of alkanol having 1 to 4 carbon atoms. These compositions are useful in dewatering non-absorbent articles such as made from metallic, ceramic, or polymeric materials.
Abstract:
An actuating system for a primary flight control surface including unique electric drive motors having an integral detent mode. The motors include a unique laminated stator core and means for changing the continuity of the magnetic circuit. The stator core structure is split into two part-cylindrical elements which define air gaps between their opposing ends. Flux gates fill the air gaps and provide magnetic circuit continuity. The flux gates are connected to solenoids which can displace the flux gates in and out of the air gaps, thereby changing the continuity of the magnetic circuit of the motor. The motor rotor aligns its magnetic axis with the air gaps, and will resist substantial imposed torque loads.
Abstract:
A high load capacity journal foil bearing (16) and more particularly undersprings (22) therefor. The journal foil bearing (16) preferably includes a number of individual pads or foils (20) which are conventionally mounted to a journal and have a pad face proximate a rotating shaft (12). The undersprings (22) each include a number of curvilinear support beams (30) or corrugations which are varied in width and pitch to optimize the spring force supporting the overlying foil (20). The underspring (22) is configured to have wider beams at their leading edge (44) and progressively narrower beams for approximately the first one half of the circumferential length.
Abstract:
A solvant control arrangement for stripping liquid solvent from parts being degreased/defluxed in a degreaser or defluxer by intimate contact with liquid solvent or a vapor phase thereof is disclosed. The solvent control arrangement comprises a tank or box having an open end extending downwardly into the vapor zone in an exit area of the degreaser/defluxer to define a flash drying chamber above and in communication with the vapor zone. The solvent covered parts are directed into the flash drying chamber from the vapor zone where heat is applied to heat the air in the flash drying chamber to a temperature above the solvent boiling point to thereby evaporate liquid solvent on the parts. The parts are then returned from the chamber into the vapor zone where they ultimately exit the degreaser/defluxer from the exit end. Optionally, condensing coils may be disposed in the chamber at the vapor line to condense solvent in the chamber and prevent the solvent vapor zone from encroaching within the chamber. The amount of solvent within the chamber may be further controlled through an outlet duct arrangement directing solvent laden air from the chamber through dehumidifying coils, molecular sieves, carbon absorption filters or like solvent stripping mechanisms.
Abstract:
An adjustment member (86) for establishing the space relationship between a reaction disc (84) and a plunger (52) in a brake booster (10) to delay the communication of reaction forces produced as a result of resistance to movement of an output member (44) until a predetermined force is developed in a master cylinder.
Abstract:
A turbine engine includes adjacent compressor (12) and turbine (22) sections and an interstage seal assembly (30) interposing therebetween in cooperation with a rotor assembly (33) of the engine to inhibit leakage of pressurized air between the sections. The interstage seal assembly (30) includes an annular wall portion (72) at its outer perimeter cooperating with a housing of the engine and at its inner perimeter sealingly cooperating with the rotor assembly (33). The wall portion of the interstage seal includes nested conical sections of opposite axial dispositions which cooperatively resist both thermal and pressure differential induced distortion of the seal assembly.