Abstract: A solar energy powered heat generator is especially designed for economical manufacture and maintenance by incorporating a plurality of triangular shaped mirrors interconnected into an inverted cone for collecting solar energy. A coiled length of tubing is disposed centrally of the cone for heat transfer. Preferably, a plurality of such cones with a respective plurality of such coils are interconnected to enable collection of solar energy as the sun orbits without using a sun tracking device.

Abstract: An endless belt gravity filtration apparatus which includes a vacuum system for removing filter cake and for cleaning and keeping filter belt porous through reverse air flow on the endless belt filter. The belt filter has extensions along each of its continuous edges, these extensions having chains which mate with sprockets on the filter chamber to assist in driving the filter belt and to keep it aligned and from being stretched or wrinkled during the filtration process. The apparatus may be used for filtering fluids such as sugar cane juice.