Abstract: A machine utilizing the unbalance created by liquid driven from lower vessels to upper vessels by vapor pressure of a dual fluid said unbalance being utilized to rotate a shaft to which the vessels are attached. Continuation of rotation is achieved by a criss-cross fluid passage arrangement whereby the fluid from the lower heated vessel is transferred to the upper vessel next to be immersed in a cooling medium while the fluid from the lower colder vessel is transferred to the upper vessel next to be immersed in a heating medium.

Abstract: An apparatus for the concentration of solar radiation by directing it upon Fresnel zone sections of axially short, electroplated surfaces of spin cast parabolic mirrors. The short focal length optical system is composed of off axis parabolic surfaces of revolution and secondary reflectors. These reflectors concentrate the suns rays to produce heat with which to generate steam, and to melt high temperature salts.

Abstract: An apparatus for the concentration of solar radiation to a utilizable flux by directing it vertically downward upon the reflecting surface of a rotating liquid and utilizing the concentrated radiation at or near the focal point of the resulting optical system comprised of the combination of the paraboloid of revolution at the rotating surface of liquid, the reflecting plane surfaces used to direct the suns rays vertically downward, and shaped reflectors which may be used to direct the concentrated radiation to a radiation to enthalpy heat exchanger.