US628960A - Rotary engine. - Google Patents

Description

Patented luly I8, |899. W. lA. PARKER. .l ROTARY ENGINE.

(Application filed Jme 4, 189B.)

3 Sheets-Shaet I.

(No Model.)

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v Patented luly I8, |899. W. lA. PARKER` RUTABY ENGINE.

(Application led June 4, 1898.)

3 Sheets-Sheei 2.

(No Model.)

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ROTARY ENGINE.

(Application led June 4, 189B.)

3 Sheets-Shen 3.

(No Model.)

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SPECIFICATION arming part of Letters Patent No. 628,960, dated July 18, 1899- Applieation filed lune l1,1898. Serial No. 682,618. (No model.)

To a/ZZ whom t may concern:

Beit known that I, WILLIAM A. PARKER, a citizen of the United States of America, residing at Collins, in the county of Story and State of Iowa, have invented a new and useful Rotary Engine, of which the following is a specification.

The object of this invention is to provide means for balancing the concentric piston of a rotary steam-engine and in so doing minimize the friction of said piston and provide for the maximum efiiciencyin the use of steam thereby.

Afurther object of my invention is to provide cut-olf valves for the concentric piston in order that the expansion of the steam may be utilized to the fullest extent.

My invention consists in the construction, arrangement, and combination of elements hereinafter set forth,pointed out in my claims, and illustrated by the accompanying drawings, in Which- Figure 1 is a plan of the engine. Fig. 2 is a sectional elevation of the engine transversely of the concentric piston. Fig. 3 is an elevation of the engine, the casing thereof being removed and shown by dotted lines. Fig. 4c is an interior elevation of the engine, showing cut-off valves applied therein. Fig. 5 is a sectional elevation similar to Fig. 2, showing the cut-off valves Vin place.

In the construction of the engine as shown the numerals 10 11 designate cylinder-heads, and 12 a cylinder-casing mounted between and communicating with said heads. The cylinder-heads 10 and 11 are provided with base portions 13 14, adapted for securance to v:an engine-bed, and the cylinder-casing is annular in form. A main shaft 15 is mounted for rotation in stuffing-boxes 16 17, axially positioned in the cylinder-heads 10 11, and a balance-Wheel 18 is keyed upon said main shaft adjacent to the cylinder-head 10. A drive-wheel (not shown) may. be mounted upon the main shaft and employed to communicate the motion thereof to mechanism to be driven in a common and Well-known manner.

The numeral 19 designates the steam-supply pipe, leading from a boiler and carrying a three-way valve 20, so arranged as that in one position said valveisopen forthe passage Y from said cylinder-head.

of steam from the supply-pipe into both of tWo ingress-pipes 21 22, communicating therewith. The ingress-pipe 22 leads from the valve 20, located at 'one side of the enginecylinder, and is tapped into an ingress-port 23 in the cylinder-head 11. The ingress-port 23 extends through the cylinder-head 11 and through a cam-faced block 24, located on and extended inwardly from said cylinder-head.v Immediately above the ingress-port 23 is 10- cated an exhaust-port 25, also extending through the cam-faced block 24 and cylinderhead 11. An exhaust-pipe 36 is tapped into the exhaust-port 25 in the cylinder-head 11. A line drawn through the axes of the exhaustports 23 and 25 will be laterally removed from and to the rear of the axis of the main shaft 15. The ingress-pipe 21 leads from the valve 20 above and across the axes of the cylinders -heads 10 11 and is tapped into an ingressport 27 (dotted lines in Fig. 3) in the cylinder-head 10. The ingress-port 27 in the cylinder-head '10 also traverses a cam-faced block 28, xed to` and extending inwardly Immediately below the'ingre'ss-port 27 and also traversing the cam-faced vblock 28 and in cylinder-head 10 is an exhaust-port 29. Aline drawn through the axes of the ports 27 29 would beat the front of the axis of the main shaft 15 and on the opposite side of said shaft from a line drawn through the axes of the ports 23 25. An exhaust-pipe 30 is tapped into the exhaustport 29 in the cylinder-head l0. Hubs 31 and are formed on the blocks 24 and 28 and extend toward each other to the planes of the innermost points of said blocks and surround the main shaft 15 concentrically. A concentric piston 33 is mounted rigidly on the main shaft 15 between the hubs 3l 32 and is provided with circumferential packing-rings-34 35, engaging the axial surface of the cylinder-casing 12. A sliding piston 36 is mounted loosely in and arranged for slidin g engagement with the concentric piston 33. The slidingpiston 36 extends radially of the concentric piston 33 from the peripheries of the hubs 31 32 to the axial surface of the cylinder-casing 12 and in length from side to side of the concentric piston and extending therefrom on one side or the other. Packing-blocks 37 38 are slidingly mounted in slots formed in the extremities of ICO the sliding piston 36. Each of the packingblocks 37 38 is slotted transversely, and pins 39 traverse said slots and are seated in the arms of the slidingpiston 36. Expansive coilsprings 40 are located between the inner ends of the packing-blocks 37 38 and the sliding piston 36,Whereby said packing-blocks are impelled outwardly at all times and into frictional engagement with the cam-faces of the blocks 27 28.

When the engine is to be operated with the direct force of the steam, said steam is turned through the port 23, acts upon the projecting portion of the sliding piston 36 and packingblock 38, and rotatably moves the concentric pist-on beyond the port 25, at which place or port 25 the steam exhausts. Upon the exhaust of the steam through the port 25 steam introduced through theport 27 acts upon the opposite and now projecting portion of the sliding piston 36 and the packing-block 37 and impels the piston beyond the port 29, at which the steam introduced through the port 27 exhausts. Continuous introduction of the steam and almost continuous exhaust thereof successively from opposite sides of the concentric piston tends to balance said pistou and set up and continue the movement of rotation thereof. It Will be observed that throughout a portion of its circumference the concentric piston engages frictionally at its sides with plane faces of the blocks 24 and 28, which engagement serves as a cut-off for the stealn to prevent the waste thereof rearwardly.

When the engine is to be operated by expansion, I employ the structure shown in Figs. 4 and 5, in which the cylinder-heads l0 1l are centrally apertured and provided with closingplates 4l 42. The cam-faced blocks 24 28 are recessedin their outerfaces,and cut-off valves 43` 44 are mounted between the blocks and closing-plates and keyed to the main shaft 15.

Segments of the valves 43 44 are cut away at opposite point-s of the peripheries thereof, as shown and indicated by the numerals 45 46 in the drawings. In the rotation of the main shaft the cut-off valves successively and alternately cut off the passage of the steam through the ports in the blocks 24 28 and permit the expansion of the steam to continue the rotation of the concentric piston.

I claim as my inventionl. In a rotary engine, a cylinder, heads in the ends of the cylinder provided with bearings for a shaft, a rotatable shaft in concentric position with the cylinder, a piston fixed to the shaft, cam-faced blocks having integral hubsk mounted on the shaft at the sides of the piston, Avalves having segments cut away fitted in the cylinder between said blocks and the heads and ingress and exhaust ports, all arranged and combined as shown and described to operate in the manner set forth for the purposes stated.

2. The concentric piston mounted for rotation, the camsfaced blocks on either side of said concentric piston, the sliding piston mounted for reciprocation across the face of the concentric piston, packing-blocks yieldingly mounted in the ends of the sliding piston, ingress and exhaust ports for the steam arranged in duplicate on opposite sides of the concentric piston and on opposite sides of the axis thereof, a supply-valve, -a main shaft carrying the concentric piston and the cut-off valves mounted on the main shaft and controlling the ingress and exhaust ports, which cut-off valves are formed with peripheral notches approximating in length to one-half the circumference ofsaid valves.

VILLIAM A. PARKER.

Witnesses:

W. H. OZMEN, J. G. GINGLER.

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