Nikola Tesla U.S. Patent 1,061,206 - Turbine Patent Wrapper Page 18

882 V 6. The method of deriving energy from a fluid under pressure which consists in directing it upon peripheral portions of rotably arranged disks, causing it to flow between the same, under the combined inriuence of radial and tangential forces, in natural spirals towards the axis of rotation, and propelling the disks by the adhesive and viscous action. thereon of the fluid, as set forth. 7. The method of transforming the potential energy of a fluid under pressure which consists in a dmitting it to peripheral portions of rotably arranged plane surfaces, causing it to flow between the same, nder the combined influence of radial and tangential forces, in natural spirals towards the axis of rotation, and propelling the surfaces by the adhesive and viscous action thereon of the fluid, as set forth. 8. As an improvement in the transmission of power, the ! method of deriving energy from á fluid, based on adhesive and viscous action, which consists in causing the fluid to flow, under the combined influence of radial and tangential forcès, Erased per a 9082 robably arranged surfaces from the peripheral towards the axial portions of the same, and propeling the surfaces by the adhesive and viscous action of the fluid there on, as set forth. 4.3. The method of deriving motive power from a compressed gaseous medium which consists in directing it through a suitable channel upon peripheral portions of a rotable system, causing it to expand continuously and to flow, under the combined influence of radial and tangential forces, in natural spirals towards the axis of the system, and propelling the system by the adhesive and viscous action of the medium thereon, as set V forth. -14