Nikola Tesla U.S. Patent 1,061,142 - Fluid Propulsion Patent Wrapper Page 26

826 a 40 runIn these drawings the device illustrated contains a ner composed of a plurality of flat rigid disks 1 of a suitable diameter, keyed to a shaft 2, and held in position by a threaded nut 3, a shoulder 4 and washers 5, of the requisite thickness. Each disk has a number of central openings 6, the solid portions. between which form spokes 7, preferably curved, as shown, for the purpose of reducing the loss of energy due to the impact of the fluid. 8159 This runner is mounted in a two part volute casing 8, having stuffing boxes 9, and inlete 10 leading to its central portion. In addition a gradually widening and rounding outlet 11 is provided, formed with a flange for connection to a pipe as usual. The casing 8 rests upon a base 12, shown only in part, and supporting the bearings for the shaft 2, which, being of ordinary construction, are omitted from the drawings. An understanding of the principle embodied in this device will be gained from the following description of its mode of operation, - Power being applied to the shaft and the runner set in rotation in the direction of the solid arrow, the fluid by reason of its properties of adherence and viscosity, upon entering through the inlets 10 and coming in contact with the disks 1 is taken hold of by the same and subjected to two forces, one acting tangentially in the direction of rotation, and the other radially outwerd. The combined effect of these tangential and centrifugal forces is to propel the fluid with continuously increɛsing velocity in a spiral path until it reaches the outlet 11 from which it is ejected. This spiral movement, free and undisturbed and essentially dependent on the properties of the