Abstract: The present invention relates to a chlorinated polyvinyl chloride compound and an article made therefrom. The compound comprises a two step CPVC resin, chlorinated polyethylene as well as an impact modifier. The compound exhibits good physical properties, chemical resistance as well as ease of processability.

Abstract: An aqueous dispersion of 0.1 to 15 percent by weight of at least one phosphate ester and a copolymer formed by the coploymerization of a monomer mixture comprising:a) 0.1 to 15 percent by weight of at least one dicarboxylic acid,b) 0.1 to 10 percent by weight of at least one functional monomer is represented by the following formula: ##STR1## where R.sub.1, R.sub.2 and R.sub.3 are hydrogen or a methyl group, R.sub.4 is an alkyl containing 1 to 4 carbon atoms, n is 0 or 1, X is selected from the group consisting of hydrogen, carboxyl, phenyl, aryl, alkyl or alkaryl groups containing 1 to 30 atoms, and Y is a nucleophilic group selected from --OH, --NH.sub.2 or ##STR2## or ##STR3## wherein R.sub.5 is a hydrogen, an alkyl containing 1-20 carbon atoms, or an aryl group, andc) more than 80% by weight of backbone monomers.

Abstract: The present invention relates to thermoplastic polymer compounds comprising a blend of a chlorinated polyvinyl chloride and an impact modifier containing a polyorganosiloxane and polyalkyl(meth)acrylate. The novel thermoplastic compound has improved stability and toughness and exhibits a low rate of heat release.

Abstract: The present invention relates to a low VOC solvent based adhesive comprising a mixture of at least two organic solvents and a thermoplastic resin. Desirably the adhesive has a flash point of at least 100.degree. F. when measured in accordance with ASTM D3828-87. The solvent blend of the low VOC solvent based adhesive of the instant invention volatilizes at substantially reduced rates as compared to conventional solvent blends in solvent based adhesives. Furthermore, this novel low VOC solvent based adhesive is easy to apply, cost effective, and cures within a reasonable time without the use of heat, ultraviolet light or other mechanical devices. In addition, the novel low VOC solvent based adhesive has good storage stability in metal or non-metal containers.

Abstract: A thermoplastic polyether polyurethane having good rebound resilience and low hysteresis properties is prepared by the reaction of a diisocyanate with a hydroxyl terminated polyether having a weight average molecular weight of at least 1,400 and a glycol chain extender. The polyether contains alkylene oxide repeat units having from 2 to 6 carbon atoms and the chain extender glycol has from 2 to 16 carbon atoms. The amount of the chain extender glycol is from about 0.25 to about 2 moles per mole of the polyether.

Abstract: An ice detector includes a pair of electrodes connected by a pair of leads to a control unit which measures the total impedance between leads to thereby sense and detect the presence of ice and other contaminants formed on top thereof utilizing a comparator circuit. The electrodes are integrated into patch which can be placed at different locations on an aircraft.

Abstract: A brake control system which employs an antiskid control and wheel lock protection differential reference controller to provide antiskid and antilock brake control. The differential reference controller is capable of estimating both wheel velocity and vehicle velocity based on a single wheel speed sensor input. To reduce the effects of wheel speed noise, the differential reference controller estimates the wheel velocity and vehicle velocity by carrying out parallel processes using identical processing functions. The estimated wheel velocity and vehicle velocity are subtracted providing a differential output indicative of the slip velocity. Only unique parameters for each process, derived from physical constants, are different. In this way, the wheel speed noise is introduced into both processes and canceled when the results are subtracted to obtain the slip velocity.

Abstract: The invention is in the field of dynamometer testing of aircraft wheel and brake assemblies and, more particularly, relates to the simulation of brake and landing gear vibration dynamics on a dynamometer. The test apparatus and method according to the invention employ a pitch beam that simulates bogie pitch motion, and a walk beam that simulates landing gear walk.

Abstract: A contaminant detection system includes a transmitter for transmitting a guided wave through the skin at particular resonances, wherein each resonance point utilized will have propagation characteristics sensitive to a condition of interest. A contaminant may then be classified by transmitting several resonances and then carrying out appropriate feature extraction and pattern recognition techniques utilizing a host processor.

Abstract: A brake control system for controlling an amount of braking force applied to a wheel of a vehicle running on a surface, comprising a sensor for measuring a speed of the wheel and for providing an output signal indicative of the speed; and a controller, operatively coupled to the sensor, which implements a Kalman filter to estimate an amplitude and location of a peak in a mu-slip curve representative of a coefficient of friction between the wheel and the surface based on the output signal of the sensor, and which controls the amount of braking force applied to the wheel based on the amplitude and location of the peak.

Abstract: The invention relates to the field of braking systems, particularly those braking systems that utilize linkages to transmit brake-generated loads from a wheel and brake assembly to a braked vehicle. According to an aspect of the invention, a damped brake rod is provided for attachment to a structure, the structure having at least one wheel and brake assembly. The damped brake rod comprises a rod-like member for attachment to the brake assembly and the structure to resist rotation of the brake assembly relative to the structure, and a bending mode coulomb damper attached to the brake rod that damps cyclic bending mode movement of the rod-like member during braking. The bending mode coulomb damper bears essentially only cyclic loads induced by cyclic bending mode movement of the rod-like member generated during braking. A method of damping a brake rod is also provided.

Abstract: Silyl substituted polymers of polycycloolefins are provided as well as catalyst systems for their preparation. The polymers of the invention include polycyclic repeat units that contain pendant silyl functional groups represented by the following formulae: ##STR1## wherein A is a divalent radical selected from the following structures: ##STR2## R.sup.9 independently represents hydrogen, methyl, or ethyl; R.sup.10, R.sup.11, and R.sup.12 independently represent halogen, linear or branched (C.sub.1 to C.sub.20) alkyl, linear or branched (C.sub.1 to C.sub.20) alkoxy, linear or branched (C.sub.1 to C.sub.20) alkyl carbonyloxy, (C.sub.1 to C.sub.20) alkyl peroxy, and substituted or unsubstituted (C.sub.6 to C.sub.20) aryloxy; R.sup.10, R.sup.11, and R.sup.12 together with the silicon atom to which they are attached form the group: ##STR3## n is a number from 0 to 5; and n' is 0 or 1; and n" is a number from 0 to 10.

Abstract: The invention is in the field of electrical resistance heaters, especially heaters for tubes, pipes, or flexible hose. More particularly, the invention is directed to an electrical heater formed as a strip that is permanently set in the shape of a helix. According to an aspect of the invention, an electrical heater is provided comprising a flexible electrical insulation strip bounded by a first longitudinal edge and a second longitudinal edge, wherein the flexible electrical insulation strip is permanently set as a helix such that the first longitudinal edge is adjacent to the second longitudinal edge; and, a flexible electrical heating element encapsulated within the electrical insulation strip.

Abstract: The invention relates to the field of composite brake disks formed from fibrous structures. A brake disk according to the invention comprises an annular fibrous structure having two opposing generally planar faces and a binding matrix permeating the annular fibrous structure. Two outer portions are adjacent the planar faces, and an inner portion is disposed between the two outer portions. The two outer portions have lesser tensile strength parallel to the planar faces and greater resistance to wear than the inner portion.

Abstract: An escape slide and life raft assembly for evacuating personnel from an aircraft, with the slide having side tubes and cross tubes along with a slide panel that extends the full length of the slide. The slide has a head end and a toe end with one of the cross tubes located at the head end defining a head end tube. A girt, secured to the aircraft, has a quick release connection to the escape slide that is actuated by a lanyard, which lanyard is also connected to a plurality of releasable straps which provide support to the slide while it is being inflated. Such releasable straps are located at the head end of the slide and interconnect the head end tube and the side tubes to the girt.

Abstract: The invention relates to the field of high temperature composites made by the chemical vapor infiltration and deposition of a binding matrix within a porous structure. More particularly, the invention relates to pressure gradient processes for forcing infiltration of a reactant gas into a porous structure, apparatus for carrying out those processes, and the resulting products. The invention is particularly suited for the simultaneous CVI/CVD processing of large quantities (hundreds) of aircraft brake disks.

Abstract: This invention relates to carbon--carbon (C--C) composite comprising carbon fibers or carbon fabric, carbon char on the carbon fiber or fabric and pyrolytic carbon on the carbon char, wherein the density of the carbon composite is at least 1.3 g/cc. The invention also relates to wet friction elements and power transmission devises containing the same. The invention also relates to methods of preparing the carbon--carbon (C--C) composites. These C--C composites and wet friction elements and power transmission devises made therefrom have improved friction properties desired by wet brakes and clutches. These C--C composites provide improvements in cost, and when run against metals, such as steel or iron, improvements in wear and frictional behavior compared to known C--C composites for wet friction applications. In one aspect, the carbon--carbon does not require bonding to a metal backing or core material.

Abstract: An inflatable escape slide that includes a plurality of inflatable tubes that are held in a folded condition and elastic strap members at the site of the fold of the folded tubes that puckers up the material at the fold site to maintain an unobstructed passageway at the fold to provide communication throughout the inflatable tubes.

Abstract: Fibrous substrates for the production of carbon and/or ceramic (including mixtures of these) fiber reinforced carbon and/or ceramic (including mixtures of these) matrix composites, particularly friction discs, and to methods of manufacture of same. Offcut waste fibrous sheet material may be recycled and reformed into a web useful in the manufacture of such composites.