US864294A - Rotary engine. - Google Patents

Description

No. 864,294. `PA'IEIT'LED AUG. 27, 1907. O. T.

ROTAR NGINE.

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PATENTE'D AUG. 27, 19o?.

aBBERT. ROTARY ENGINE. APPLIOATIOI FILED JUNE 14. 1907.

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OTTO EBERT, OF CLEVELAND, OHIO.

' RoTARY ENGINE Specicaton of Letters Patent.

Patented Aug. 27, 1907.

Application tiled June 14, 1907. Serial No. 379,011.

To all whom it may concern:

Be it known that I, OTTO EBERT, a citizen of the United States, residing at Cleveland, in the county oi Cuyahoga and State of Ohio, have invented certain new and useiul Improvements inRotary Engines, oi which the following is a specification.

This invention is a rotary or turbine engine having for its object to provide improved means for utilizing the steam expansively, the steam having a circumfer- The engine has an outer cylindrical casing formed of` two circular end plates 6 and a cylindrical rim or casing 7. Thisis mounted upon suitable base, and the shaft Gr extends throughstufing boxes on the end plates.

The rotary piston consists of a hub H keyed tothe shaft, a web I, and a rim L formed with a series of curved longitudinally extending blades F the edges oi which pass in contact with the rim 7 of the casing.

Steam chambers B are formed or cut in the inside of Vthe rim 7, and connect at one end with the inlet D and at the other end with the exhaust E. The chambers B are divided into sets or expansion stages. The rst set comprise three chambers which are connected by passages A formed in the rim 7, and at the end of said set is a cut-ofi partition V. Thesecond set include two chambers Bf, connected by a passage A at the end of which is a partition M, and beyond this are successive sets B2 and B3, with connecting passages A2 and A3, and a partition P therebetween.

The distance between the blades F is somewhat smaller than the length oi the chambers B, so that there are fewer chambers than blades. The result of this is to divide the steam passage or chambers around the piston into a succession of stages delivering impulses successively to the blades and acting expansively from oneset of chambers to the other. Thus, in the position shown in Fig. 1,' steam entering the inlet D passes into the iirst chamber B and thence through the passages A to the second and third chambers, and while therein acts by impulse against the adjacent blades. When the blade indicated at Z moves to the edge of the partition V the said three pressure chambers B are closed, and being closed will receive the full pressure or impact of the steam. After traveling a sufficient distance to uncover the passages Af-which distance is about one-fourth the distance between the two blades, the pressure expands into the passages A and the chambers B/, thus bringing in two more blades and increasing the pressure area. The same movement closes the passage at the point or partition M,'which produces or causes a pressure on the blades. Continued movement of the pistons cuts in the chambers B2 and additional blades; and so on until the exhaust E is reached, where the partition at Q4 cuts off .the last two chambers and allows the exhaust when the blade travels beyond the same, at which instant the piston will have rotated the space of one tooth and brought the parts into position for a fresh impulse. There are thus, in the embodiment shown, four successive expansion stages for ex haust.

Obviously any desired combination of chambers and blades may be used, to increase or decrease the number of expansion stages, or vary the number of chambers cut in at each stage.

The piston is rendered steam-tight by packing rings K at the edges, pressed by screws O, in the end plates 6.

The construction shown and disclosed gives an engine of high e'lciency in small space, and with few and simple parts.

I claim:

1. In a rotary engine, the combination of a casing, and a rotary piston therein with blades, the casing having a series of circumferential chambers with partitions between the ends thereof positioned to be successively closed and then opened, by the passage of the blades across the same, to successively cut in additional expansion chambers, the partitions being of less width than the distance between the blades, and the relative lengths of the chambers, and said distances being unequal.

2. In a rotary engine, the combination of a casing having a series of chambers around in the rim thereof separated by partitions into successive sets, the chambers of each set being connected by passages in the casing, and a rotary piston in the casing with blades which successively pass said partitions as it rotates and successively cut in additional chambers, the relative length of the chambers and the distance between the blades being unequal.

3. In a rotary engine, the combination of a casing having a succession of chambers extending around the rim thereof from the inlet to the exhaust, said chambers being divided into a series of sets, and a rotary piston in the casing with blades which pass the chambers, the distance apart of the blades being slightly less than the length of the chambers, whereby said blades successively pass the divisions between the sets and vcut in additional sets.

In testimony whereof I do affix my signature, in presence of two witnesses.

OTTO EBERT.

Witnesses EDITH D. COMER, JOHN A. BOMMHAEDT.

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