Abstract: A polymer concrete pipe liner is formed from a fluidized, but substantially waterless cement containing mixture applied to the pipe interior. The mixture is composed of inorganic cement particles, a liquid styrene mixture and a minor amount of one or more poly-olefinically unsaturated co-monomers. The mixture substantially excludes acrylonitrile and acrylamide. The co-monomers are preferably selected from a group including trimethylolpropane-trimethacrylate, divinyl benzene, hexadiene, and polyvinylsiloxanes. Mixing the liquid and solid components forms a slurry which is transferred to a pipe interior. Transfer properties can be controlled by particulate gradation, dissolved polymers, and rheology control additives. The pipe is then spun to centrifugally cast the liner. The composition avoids the need for high temperature curing and toxic reactive unsaturates to co-polymerize and cross-link polystyrene.

Abstract: A transmission cable having a nonhalogenated jacket and a nonhalogenated composition for use as a transmission cable jacket. The jacket is prepared from a nonhalogenated polyolefin based formulation having flame retardant, low corrosivity, low toxicity and low smoke characteristics. The jacket material insulates a core transmission medium such as a metallic conductor or optical fiber. The jacket is extruded about the core or insulator during manufacture. The inventive cable has a jacket formed of nonhalogenated polyethylene and nonhalogenated ethylene vinyl acetate and provides a combination of desired mechanical characteristics, improved performance and manufacturing features while eliminating undesirable corrosive products released during a fire.

Abstract: A radiation resistant resin suitable for the manufacture of, for example, disposable medical supplies comprises a semicrystalline polypropylene or propylene-ethylene and from 1500 to 5000 ppm triallyl trimellitate. The resin exhibits substantially no increase in melt flow rate after irradiation to a dosage of up to 5 Mrads, and may contain up to about 5% by weight of a polybutylene and/or up to about 3000 ppm of a sorbital based clarifying agent.

Abstract: Procedures for machining static crankcase structure, free of motive-drive components, and fabricating in-place preselected thickness gage endplates to provide crankcases for continued use of two-cycle V-type diesel electric locomotive engines. In crankcase refabrication procedures, original endplates are removed and distal edges machined to preserve overall crankcase length within tolerance limits. Externally cut openings in peripheral air box side walls and removal of an upper portion of each endplate provide access to internal framework members for removal of the endplates. Power deck surfaces are machined uniformly and camshaft locations are determined trigonometrically responsive to such downward displacement of the power deck. The new endplates are welded in place, free of drilled or tapped drive component openings. Subsequent machining of the new endplates compensates for any existing vertical or transverse cant of each endplate.

Abstract: Longitudinal end portions of an elongated twenty-cylinder engine are disassembled to remove a cylinder location from each end of each cylinder bank for converting a crankcase from a twenty-cylinder, two-cycle, V-type diesel engine to a sixteen-cylinder configuration for use in a diesel electric locomotive. Peripheral air box access windows are provided at each longitudinal end of the crankcase. Portions of the exhaust deck, water jacket side wall and internal cylinder retainer support framing from the disassembled end portions are return welded to the remaining structure after separation of each endplate. Distal edges of longitudinally-extending remaining crankcase framework are machined to provide for receiving a new planar endplate of increased thickness gage at each end. Vibration and thermal stress-relief are applied before external surfaces of the new endplates are machined.

Abstract: A system for measuring a multipath radio channel impulse response by cross-correlating digital samples of a received pseudo-random signal with a digital copy of the transmitted signal. A transmitter within the system repeatedly transmits the pseudo-random signal across a multipath radio channel. A receiver within the system receives the transmitted signal, as well as delayed versions of the original signal, and digitally samples the received signals. A computer then cross-correlates the samples of the received signal with the digital stored version of the transmitted signal to produce a measure of the impulse response of the multipath radio channel.

Abstract: A differential analysis method can be used to determine the presence or absence of a fluid in contact with a tubing string within a wellbore. The method uses a signal generator and detects tubing-perturbed signals, searches for an initial interfacial indicator within a window, axially aligns indicators within a data series as the detector traverses the tubing, discerns an adjacent interfacial indicator known to be incrementally changed by the presence of the fluid, and compares the adjacent indicators to the known incremental change. Even if the absolute location or condition of the interface is uncertain, the relative change indicates the presence or absence of fluid. A prior condition indicator can also be used to determine a second window for detecting an adjacent surface signal indicators.

Abstract: The present invention is a method for enhancing the separation of polynucleotides or polypeptides of various chain lengths or a mixture of polynucleotides and polypeptides of various chain lengths using electrophoretic processes to sharpen sample component zones and produce maximum resolution of electrophoretically separated macromolecules by modifying the matrix of electrophoretic gel.

Abstract: A method and system, for reducing the temperature of a hydrogeothermal fluid, entails directly or indirectly contacting a self-rising, heated hydrogeothermal fluid with a cooling fluid to cool the hydrogeothermal fluid before it enters and/or as it rises in the production tube.

Abstract: A gas blocked fiber optic cable (10). A cable (10) having a fiber glass epxoy rod (12) which is top coated with EVA-Copolymer (28) and surrounded by fiber optic cables (16). Optical fibers (16) are enclosed in buffer tubes (18) filled with gel (20). Interstitial filling (28) surrounds buffer tube (18). Acid terpolymer top coat (24) bonds filler (28) to buffer tubes (18) preventing gas migration throughout the length of the cable. Black thermo plastic elastomer (30) layer surrounds filler (28) which is surrounded by the outer most polyethylene jacket (32) which is UV resistant.

Abstract: A check valve having a presettable cracking pressure. The check valve employs a spring-loaded valve element in which the compression spring and valve element are held into position in the valve body by means of an apertured plug.

Abstract: A biopsy device for obtaining biopsy specimens from hard or soft tissue includes a biopsy extracting member which may be inserted into a cannula and a removable biopsy specimen holder which is preferably threaded into the biopsy extracting member. The specimen holder preferably includes a cutting edge (e.g., serrated for hard tissue, slicing for soft tissue), and retaining fishscales or scallop members for securely holding The biopsy specimen. Once the biopsied specimen is cut from the tissue, it may be sent, within the removable specimen holder, to the pathologist for analysis.

Abstract: A rotary heat driven device comprising a rotor having sections thereof mounted on a common shaft one within and off center of each of the associated axially aligned chambers. One section comprises an engine, the other a compressor and the third a liquid pump. Each section of the rotor has at least one reciprocating vane mounted to extend through and diagonally out of each of the rotor sections with vane member positioned on the ends of each vane for following along the surface of an oblong opening in each of the chambers.

Abstract: Accessories for a pickup truck includes a front brush/grill guard, a tubular rear bumper and a rally bar with lights. The brush guard has upper and lower flanges and offset front and rear mounting brackets which sandwich the flanges therebetween to fasten the guard on the front bumper of the truck. The rear bumper assembly has first and second tubes with angled end portions which angle inward toward the truck body. The ends of the tubes are parallel to the truck body for aesthetic appeal. The tubes provide a license plate mounting area and are mounted using large and small bumper tabs, a frame bracket and a tube bracket. The rally bar assembly includes front and rear rally bars releasably connected by a two member bracket. The bracket has a front member fastened to the front bar and a rear member connected to the rear bar. The bracket also supports a light assembly for projecting light forward of the vehicle.

Abstract: A system for repairing a tear in the meniscus in the knee joint including a suture having a first leg, a second leg spaced from the first leg and a cross member connecting the first and second legs. An instrument for delivering the suture to the meniscus can be inserted through an incision in the knee and into the vicinity of the meniscus. A first end of the instrument enters the meniscus adjacent to a first side of the tear, passes through the meniscus and exits the meniscus on a second side of the tear in the meniscus generally opposite the first side of the tear. The instrument has a channel extending longitudinally of the instrument in which the first leg of the suture can be inserted. A push rod pushes the first leg and cross member generally lengthwise in the channel and into the meniscus where the suture closes the tear.

Abstract: A conical horn microwave antenna has a reflector positioned at the large end of a conical feed horn which has the side walls of the horn wider than the projected effective area of the reflector such that microwave absorber material lining the feed horn does not obstruct wave propagation between the feed horn and the effective reflector area.

Abstract: A process for the production of propylene/1-butene copolymers comprising:reacting propylene and 1-butene monomers in the presence of a catalyst system comprising:(a) a solid supported catalyst component is prepared by the method comprising: (i) co-comminuting magnesium halide support base and aluminum trihalide in a molar ratio from about 8:0.5 to about 8:3 in the absence of added electron donor; and (ii) then co-comminuting the product of step (i) in the absence of added electron donor with sufficient titanium tetrahalide to provide a molar ratio of magnesium halide to titanium tetrahalide from about 8:0.1 to about 8:1.0.(b) a trialkylaluminum co-catalyst, having from 1 to 9 carbon atoms in each alkyl group in an amount such that the Al/Ti ratio is between about 50:1 and about 500:1.(c) an alkoxy silane component of the formula R.sub.n Si(OR').sub.4-n where n=1-3, R=aryl or alkyl and R'=C.sub.

Abstract: A process for reducing the likelihood of runway incursions wherein the major components of an aircraft are individually tracked by radar instead of tracking only the overall image of the aircraft to more accurately predict possible runway incursions due to the rapid and accurate indication of any change in aircraft orientation during each sweep of the radar.

Abstract: This invention relates to alkylamino and alkyl amino alkyl diarylketones of the formula ##STR1## where Ar is aryl of the formula ##STR2## where V is hydrogen, halogen, loweralkyl, loweralkoxy, CF.sub.3, NO.sub.2 and u is an integer of 1 to 3; X and Y are independently CH.sub.2 --, --CF.sub.2 -- or --CHF--; Z and W are independently --CH.sub.2 --, --O--, --CHOH--, or --CHF--; m, n, p, q and t are integers which are independently 0 or 1; R.sub.1 is H or loweralkyl; R.sub.2 and R.sub.3 are loweralkyl; and the pharmaceutically acceptable acid addition salts thereof and where applicable the geometric and optical isomers and racemic mixtures thereof. The compounds of this invention display utility as analgesic agents and as agents for alleviating various memory dysfunctions, characterized by a decreased cholinergic function, such as Alzheimer's disease.

Abstract: A polymer concrete pipe liner is formed from a fluidized, but substantially waterless cement containing mixture applied to the pipe interior. The mixture is composed of inorganic cement particles, a liquid styrene mixture and a minor amount of one or more poly-olefinically unsaturated co-monomers. The mixture substantially excludes acrylonitrile and acrylamide. The co-monomers are preferably selected from a group including trimethylolpropane-trimethacrylate, divinyl benzene, hexadiene, and polyvinylsiloxanes. Mixing the liquid and solid components forms a slurry which is transferred to a pipe interior. Transfer properties can be controlled by particulate gradation, dissolved polymers, and rheology control additives. The pipe is then spun to centrifugally cast the liner. The composition avoids the need for high temperature curing and toxic reactive unsaturates to co-polymerize and cross-link polystyrene.