Abstract: A tire spraying apparatus is disclosed including a frame having a vertically extending standard and a generally horizontal extending tire supporting frame portion receivable in the opening of a tire. The tire supporting frame portion includes a pair of spaced, tire bead engaging drive rollers and mounted below the frame portion is a tire hold-down member to engage the tire beads to hold the tire against the rollers. Liner spray nozzle means are mounted between the rollers for spraying a liquid liner material upwardly into the tire interior and bead spreading means extend upwardly from the tire supporting frame portion for spreading the sidewalls of a tire mounted thereon to hold the sidewalls apart while the tire is being rotated and sprayed. Mounted generally above the tire is a trailer member having a tire crown engaging wheel and carrying a plurality of recapping cement spray nozzles.

Abstract: A laser beam pointing aid for field testing of breadboard laser systems and tilizing a hollow housing with apertures at each end and with crosshairs at one end of the housing and a telescope adjustably mounted to the hollow housing and being positionable relative to an output beam from a laser system to allow one to utilize the last mirror of the laser system and the laser beam pointing aid to accurately point the laser beam to a target.

Abstract: A method of separating small diameter non-magnetic particles of different densities by using a low magnetic saturation ferrofluid and a high magnetic gradient to produce levitation by overcoming the magnetic attraction of the particles.Application of a constant gradient field of a level below the magnetic saturation level of the ferrofluid forms the ferrofluid into a density gradient column. Each non-magnetic particle levitates to the level inside the ferrofluid having the same apparent density as the particle.The ferrofluid contains magnetic particles with a mean effective core diameter less than about 50 angstroms and a stabilizing agent layer on the particle exceeding about 50 angstroms. Perfluorinated carriers and surfactants are preferred for their relatively high intrinsic density.

Abstract: A method of separating non-magnetic particles of different densities by using a ferrofluid to produce levitation wherein compensation is made for the magnetic attraction or interaction of the particles by removing particles too small for the desired sharpness of separation or by maintaining the ratio of the interaction force to the separation force outside of theoretical limits.

Abstract: A nonimaging technique for identification of a ground vehicle as a nontar utilizing a pulsing infrared wavelength energy source located on the ground vehicle and a matched receiver at the point making the identification. The transmitter is designed to not increase the vehicle infrared signature nor to be easily duplicated by target vehicles. The receiver allows continuous identification of detected vehicles in a highly discriminating system.