Improvements in Rotary Engines

12,261. Jahn, J. May 30. Disc-engine and inclined - shaft type.-The two conical slotted surfaces A, B, shown separately in Fig. 8, have a series of two or more pivoted vanes E, Figs. 1 and 6, contained in these slots, the edges of which fits against the inside of the spherical casing C as shown in Fig. 3, which is a sectional elevation of one half of the chamber and one disc. In the centre is a ball d, which may be fitted to one of the discs, and prevents the slots from coming together and their edges striking. Steam is admitted through the port s, and the passages s , s are for conveying steam to the back of the two discs ; f , h, Fig. 3, are the exhaust passages. When the double diaphragm reaches the position a, b, Fig. 4, steam enters from the port s, and, as the disc revolves, the steam space enlarges rapidly. The steam is wire-drawn, which causes it to expand. When the double diaphragm has moved through half a revolution, the steam is cut off. The steam within the space from a to b continues to expand until the diaphragm reaches the position c d, when it exhausts ; the live steam from the boiler and the expanding steam thus act together. In one modification, the discs are not slotted, but the vanes are pivoted on the discs, which are recessed somewhat to allow for their folding up. Two or more engines may be united, the exhaust from one working the other. These engines may be used to drive dynamos and motor cars, and may be worked with compressed air and other substances.