Nikola Tesla U.S. Patent 1,061,206 - Turbine Patent Wrapper Page 53

r J J J #603,049-------2 Count 3. A rotary engine adapted to be propelled by adhesive and viscous action of a continuously expanding fluid comprising in combination a casing forming a chamber, an inlet or inlets tangential to the periphery of the same, and an cutlet or outlets. in its central portion, with a rctor composed of spaced disks mounted on a shaft, and open at or near the same, as described. Count 4. A machine adapted to be propelled by fluid, consisting in the combination of a plurality of disks mounted on a shaft and open at or near the same, and an enclosing casing with ports or passages of inlet and outlet at the peripheral and central portions, respectively, the disks being spaced to form passages through which the fluid may flow, under the combined influence of radial and tangential forces, in a natural spiral path from the periphery towards the axis of the disks, and impart its energy of movement to the same by its adhesive and viscous action thereon, as set forth. Count 5. A machine adapted to be propelled by a fluid comprising in combination a plurality of spaced disks rotatably mounted and having plane surfaces, an enclosing casing and ports or passages of inlet and outlet adjacent to the periphery and center of the disks, respectively, as set forth. Count 6. A machine adapted to be propelled by a fluid comprising in combination a runner composed of a plurality of disks having plane surfaces and mounted at intervals on a central shaft, and formed with openings near their centers, and means for admitting the propelling fluid into the spaces between the disks at the periphery and discharging it at the center of the same, as set forth. 64 917