Abstract:
A real time computer image generation system incorporating comprehensive distortion correction in which a predistorted image is computed and placed on a projection raster prior to projection onto a view screen in order that the image as seen by a viewer appears correct. A method for implementing comprehensive distortion correction in real time utilizes fixed transfer characteristics of a projection lens coupled with scene by scene translation of each of a plurality of predetermined points from a projection raster to a location on a view screen. Each image is divided into a plurality of spans and the span corners are mapped from the projection raster to the view screen. The location of image vertices on the view screen are determined with respect to the viewer and the vertices are mapped to corresponding locations on the projector raster. An image is then generated by locating the spans within which each of the vertices is positioned and constructing an image on the projection raster using the map span corners in viewer space and the mapped vertices in projector space. The reconstructed predistorted image is then projected onto the view screen so that it appears correct to a viewer.
Abstract:
A first annular form (4) used for making a transformer core is wound from a strip of amorphous ferromagnetic material and is thereafter cut. The resulting laminations are then arranged in a second annular form (10) with distributed gap joints in region (17), each joint involving a plurality of superposed lamination. The second annular form (10) is then formed into a rectangular shape core and is then annealed. Then a bonding agent (26) is applied to the transverse edges of the laminations over a region of the core removed from the joints. The joints are then separated to open the core, allowing displacement of unbonded regions of the core. Thereafter, preformed coil structure (28) is inserted into the window of said open core to surround a portion of the core. Then the unbonded regions of the core are returned to their original positions to remake the joints.
Abstract:
The properties of polymer mixtures which comprise an aromatic polycarbonate, an aromatic polyester and a core-shell polymer having an acrylate core, can be improved by using a core-shell polymer having a particle size of less than 0.2 micrometers.
Abstract:
Flame retardant poly(alkenyl aromatic) oligomers and lower molecular weight polymers having bromine substituents on the aromatic nucleus are prepared by cationic polymerization from the corresponding brominated monomers, for example, bromostyrene, in an organic solvent, using a Lewis acid catalyst and an aromatic chain transfer agent. The lower molecular weights enable greater tolerance with other thermoplastic polymers, and as a result compatible flame retardant blends with good ductile impact properties are possible.
Abstract:
Resinous composition exhibiting improved impact strength consisting essentially of, in physical admixture: (i) a blend containing (a) at least one aromatic carbonate polymer, and (b) at least one amorphous copolyester resin; and (ii) an amount at least effective to improve the impact strength of said blend of at least one olefin diene terpolymer.
Abstract:
Automated gas chromatographic apparatus is utilized to analyze various gases dissolved in the insulating oil of an oil-filled power transformer in an expeditious and reliable manner. A sample of the insulating oil is introduced into a sample loop (24) via a sampling valve (22), from which it is propelled by an inert carrier gas into a degassing chamber (26) comprised of a vertically oriented tube (70) packed with spherical packing elements (74). The carrier gas sweeping upwardly through this tube (70) strips the various gases out of solution for conveyance by the carrier gas in plug flow fashion to a gas chromatograph where the stripped gases are separated and individually analyzed.
Abstract:
Novel poly(etherimide esters) are prepared by reacting a diol, a dicarboxylic acid, a poly(oxy alkylene) diamine and a tricarboxylic acid having two vicinal carboxyl groups or the anhydride thereof.
Abstract:
Chloroformate compositions, particularly bischloroformate compositions, are prepared by the reaction of phosgene with a hydroxy compound, preferably a dihydroxy compound such as bisphenol A, in a heterogeneous mixture, while adding a hydrogen chloride scavenger comprising aqueous base as necessary and maintaining a pH of 0.5-8 during the phosgene addition. When a polyhydroxy compound is employed and the temperature is above 30oC, the phosgene addition rate is maintained at a level high enough to effect rapid and complete reaction with dissolved hydroxy compound. This method uses substantially less phosgene than methods involving a higher pH.
Abstract:
A gun capable of operating at relatively higher temperatures. The barrel of the gun is made up of at least two layers. The inner layer (22) is of a refractory material which may be a metal refractory or a non-metal refractory. The liner (28) is bonded to an outer jacket material formed of an alloy of nickel, aluminum and molybdenum. The coefficient of expansion of the liner (28) and of the jacket are relatively low so that the gun does not expand extensively when heated by intensive use. The jacket metal is of higher strength at elevated temperature than is the conventional gun barrel steel.