Nikola Tesla U.S. Patent 1,061,206 - Turbine Patent Wrapper Page 22

886 انستم disks having plane surfaces and mounted at intervals on a central shaft, and formed with openings near their centers, and means for a dmitting the propelling fluid into the spaces between the disks at the periphery and discharging it at the center of the same, as set forth. 72 A thermo-dynamic converter, comprising in combinadisks with tion a series of rotably mounted spaced plane suffaces, an enclosing casing, inlet ports at the peripheral portion and outlet ports leading from the central portion of the same, as set forth. 9086 8.2. A thermo-dynamic converter, comprising in combination a series of rotably mounted spaced disks with plane surfaces and having openings adjacent to their central portions, an enclosing casing, inlet ports in the peripheral portion, and outlet ports leading from the central portion of the same, as set forth. -18