UNITED STATES PATENT OFFICE. OLIVER WRIGHT AND A. A. WILDER, OF WARSAW, NEW YORK. ROTARY STEAM-ENGINE. Specification of Letters Patent No. 667, dated April 2, 1838. To all whom it may concern: Be it known that we, Oliver Wright and Aretus A. Wilder, of Warsaw, in the county of Genesee and State of New York, have invented a new and useful Improvement in the Reacting Steam-Engine; and we do declare that the following is a full and exact description. The nature of our invention consists in providing the apertures or orifices of the engine with springs and set screws so that they may be opened or closed as may be required. This is effected by having a spring placed in the apertures and riveted to the part forming the end of the tube or steam conductor, the set screw passes through the same so that by starting the screw forward it presses against the spring and closes the orifices. Figure 1 represents the engine wheel with one of the side plates removed to show the manner of constructing the same. a, a, the hollow arms or tubes which convey the steam from the center to the edge of the wheel. b is two iron plates about six inches in diameter placed each side of the arms or tubes and firmly riveted together for the purpose of holding the foot of the false arms. C, C, C, false arms through which the side plates are riveted, d, the rim through which the side plates are also riveted. e e represents the springs in the hollow arms. f, f, set screws for moving the springs e, e. Fig. 2 represents one half of the case with an opening or door on the side for the purpose of conveniently having access to the orifices. Fig. 3 a small door to fit the opening in the case. What we claim as our invention and desire to secure by Letters Patent, is� The application of springs and set screws to the apertures of rotary steam engines, and also of placing a door in the case so that the apertures may be closed or opened without taking the case apart. OLIVER WRIGHT. ARETUS A. WILDER. Witnesses: John Wilder, Wm. Andrews.