Nikola Tesla U.S. Patent 1,061,206 - Turbine Patent Wrapper Page 24

888 Enased feer 13 ✓ U.S. Pate it! O Div. 18, Room 325. TENT In the matter of the application of Nikola Tesla, filed January 17, 1911, Serial No. 603,049, Subject: Rotary Engines & Turbines. DEC 2 1 1 Chick Sir:- Hon. Commissioner of Patents, Amendment New York, October 25, 1911. In the above named application we now amend by cancelling claims 1, 2, 5, 6, 7, 8, 9, 10, 11, 12 and 14, and substituting the following for the claims erased: 1. The method of deriving energy from a fluid, which consists in admitting it under pressure to the peripherial portion of a rotably mounted system of plane spaced surfaces and, by its adhesive and viscous action thereon as it flows, under the combined influence of radial and tangential forces in a natural spiral path towards the axis of rotation, propelling said system. 2. The method of deriving snergy from a fluid, which consists in admitting it under pressure to the peripherial portion of a rotably mounted system of plane spaced surfaces,. V and, by its adhesive and viscous action thereon, as it flows under the combined influence of radial and tangential forces in a natural spiral path with continuously diminishing velocitx Argument: towards the axis of rotation, propelling said system. In claim 15, line 4, cancel the words "with passages through" and insert "having plahe spaced surfaces between" Before discussing the propriety of the claims now pre-123