Nikola Tesla U.S. Patent 1,061,142 - Fluid Propulsion Patent Wrapper Page 19

J What I claim is: 1. The method of imparting energy to or deriving it from a fluid, based on adhesive and viscous action, which consists in admitting the fluid to the central or peripheral portion of a rota-bly arranged system and causing it to flow, under the combined action of radial and tangential forces, in a spiral path towards the periphery, or the axis, of the rotating system, as set forth. 2. As an improvement in the transmission of power the method of imparting energy to or deriving it from a fluid, based on adhesive and viscous action, which consists in causing the fluid to flow, under the combined action of radial and tangential forces, in curved paths away from, or towards the axis of a rotably arranged rigid system, as set forth. 3. The method of imparting energy to or deriving it from a fluid, based on adhesive and viscous action, which consists in admitting the fluid to the central or peripheral portion of a rotably arranged system and causing it to flow, under the combined action of radial and tangential forces, in a spiral path (with gradually increasing or diminishing velocity) towards the periphery, or the axis,of the rotating system, as set forth. 8153 4. The method of deriving energy from a moving fluid, adhesive and viscous action, which consists in admitting the fluid to the peripheral portion of a runner and causing it to give up its energy of movement while flowing. with continuously diminishing velocity in a spiral path towards the axis of the runner, as set forth. 5. The method of imparting energy to a fluid, based on based on -13819