Abstract: Water containing combustible sludges are dried with the multiple effect use of the heat required by adding recycled cool high boiling oil and heating the mixture by direct contact with steam produced as later described. Then the oil sludge mixture has water separated off which is possible, since water has been added by the direct condensation of steam in the heating of the mixture plus any extra original water in the sludge that can be removed by a centrifuge. The mixture is heated again by adding hot oil and then the mixture has water evaporated off by reducing the pressure. This steam produced is used for the direct steam heating mentioned above. Then water vapor is evaporated off again by reducing the pressure again and this water vapor is condensed by a water cooled condenser. In this way water vapor is evaporated off with the double use of heat. By indirect heat exchange of separated warm water with oil plus dried solids being heated sensible heat losses are kept small.

Abstract: The hot and cold gases of a Stirling Cycle engine are stored in the opposite ends of a rotating hollow cylinder with the inner surface of the cylinder covered with water held in place by centrifugal force. The hot and cold gases are kept separate by a piston, that moves back and forth in the rotating cylinder, with the outer edge of the piston dipping in the ring of water providing a gas seal.The gas when heated and introduced into the hot end of the rotating cylinder is given the same angular velocity as the rotating hollow cylinder by means of a large number of small holes in a molybdenum sheet of metal. The molybdenum metal is strong and is not corroded, in the hydrogen gas used as the working fluid, at temperatures as hot as 2200.degree. Fahrenheit or even hotter.The system is the basis of a low first cost power plant where hydrogen is compressed, expanded through a turbine with the generation of power and then compressed over again. The overall power plant needs less than 7500 BTU per KWH.

Abstract: A sprinkler system weighing, when automatically drained, under 20 pounds per 1000 foot of tubing plus sprinkler heads and, that can be rapidly rolled up by a tractor carrying a reel, is made of two concentric polyester plastic tubes both 2 inches in diameter with 0.001 inch thick walls. The two concentric tubes are sealed together at the top and 0.04 inch diameter holes are spaced at 6 foot intervals along the top seal so that water flowing through the inner tube can spray out. The outer tube is aluminized to protect the polyester against the sun and a black stripe is painted along the top of the outer tube so that photoelectric cells can make the spray holes along the black line be unrolled on top when the irrigation tubing is put in place. When it is desired to move the irrigation tubing, the water is shut off and air is forced between the inner and outer tubes. This about completely forces the water out of the inner tube making an extremely light load to roll up and carry.