Abstract: A passive infrared detection system which exhibits a consistent optical aperture and sensitivity over different operating ranges. The system includes a mirror assembly having a plurality of spherical segments arranged in two or more ranks, each corresponding to a different operating range. Each mirror segment is disposed at its respective focal length from a detector, and is of a size and configuration to provide an intended optical aperture to achieve uniform detection sensitivity irrespective of the range of the target.

Abstract: Charge transfer complex cathodes for use in solid cell systems wherein the cathodes are the reaction products of a halogen such as iodine or bromine with a carbonaceous pitch such as mesophase pitch.

Abstract: A power transmission that includes hydraulically-operated clutches that are electively supplied with operating fluids by a selector valve that is controlled by an error signal means constructed to compare prime mover speed and user demand speed. The transmission preferably is a split torque hydromechanical transmission having one power path going through a hydrostatic pump-motor unit and another path going only through epicycloidal gearing system containing the hydraulically-operated clutches. The transmission is controlled hydraulically rather than mechanically, thereby avoiding problems relating to mechanical slack, response lag, and reliability.

Abstract: This invention relates to the retardation of evaporation of ammonia and amines from essentially aqueous solutions by admixture thereto of an alkyl ether having the formula:R -- (0[CH.sub.2 ].sub.y).sub.n --R', wherein R is an alkyl group containing from 8 to 30 carbon atoms, and R' is an --OH or --NH.sub.2 group, y is an integer of 2 to 4, and n is an integer of 1 to 10.