US58900A - Improvement in rubber for dental purposes - Google Patents

Description

UNTTED STATES PATENT OEEIcE.

SIMEON SHERMAN, OF VESTUN, MISSOURI.

IMPROVEMENT IN ROTARY ENGINES.

Specilieation lbrming part of Letters Patent No. 58.900, dated October 1li, lSfitl.

To all whom rit may concern:

Be. it known that I, VSrMEoy SHERMAN, of VVestOn, in the county ot' Platt and State of Missouri, have invented a new and Improved Rotary Engine; and I do hereby declare the following to be a full, clear, and exact description ot' the same, sutlieient to enable any one skilled in the art to which the invention appertains to make use ot' it, reference being had to the accompanying drawings, in which- Figure 1 is a central vertical longitudinal section on the line v .17, Fig. 2. Fig. 2 is an elevation on the line b l, Fig. l. Fig. 3 is a vertical section on the line c c, Fig. 1. Fig. i 1s a section on the line a a, Fig. 1. Fig. 5 is a section on the line d d, Fig. 1.

The improvement. consists in the mode of operating the abutment valve -piece, which controls the steam-passages and closes that portion ofthe chamber after the piston has passed that point.

It also consists in the arrangement ot' theY condenser in direct connection with the exhaust-openings, which are guarded by the rotating abutmentvalve.

It also consists in the arrangement oi' the enginepumps and condenser.

1n the drawings, A A are standards supgorting the main shaft, B, carrying the piston C, which has au expansible packing arrangement, D E F. The piston revolves in a chamber inside the casing G, the latter being supported u,by the walls ofthe condensing-cliamber ll,

and ultimately by the door I.

The segment ot' a cylinder, J, mounted on a shaft, K, and having bearings in the casing G, is perforated for the passage ol" steam to the chamber, and acts both as a valve and an abutment.

L is the inlet-port for the passage of steam from the boiler, and M are the passages in the valve J, by which steam is admitted to either side by the piston C, as it may be required to run the engine in either direction.

The exhaust-passages M M, on either side of the abutment-piece J, connect the steam-space in the cylinder with the condensingehamber N, which has a perforated diaphragm, 0, and a bottom, P, the latter opening automatically I tates.

under an accumulation of water above it, and being restored to position by the spring Q.

The water for the condei'isation ot' the steam in the chamber N is introduced into the latter by the pipe R, which proceeds t'rom the chamber S, in which the chambered disk T ro- This disk forms the coldwa ter pump, and acts as a chambered valve. The water Hows in at the opening U, and a quantity equal to the aggregate capacity of the chambcred reeesses in the disk is carried forward at each revolution and permitted to iiow through the pipe lt to thc condenser N.

The piece .T acts as a valve for the admission and emission ot' steam to and from the cylinder, aswell as acting as an abutment to close the annular steam-space at the proper times. It has a reciprocating rotary motion produced by the alternate action of the projection V and the spring l upon the cain X, which is atA tached to the shaft K of the valve J.

The projection V is upon the wheel Y, which latter is attached to and revolves with the main shaft B, and as the position ot' the projection agrees in position with the piston, thc

former, coming in contact with the cam X, rotates it, so as to remove the abutment and allow the piston to pass, as shown in Fig. 2.

As soon as the piston has passed, and the projection V has passed thc cam X, the spring W on the cam restores the abutment to its position with one edge in contact with thcperiphery of the revolving cylinder trom which the piston projects.

The packing arrangement in the piston con sists ofthe portions 1) E F, the center piece of which comes in contact with the inner periphery ot' the steam-cylinder, the end pieces moving against the ends of the cylinder, expanded and kept in contact therewith bythe spring Z.

The corners y or hof the abutment will close the annular steamchamber at its lower portion at all times when the piston is not passing the abutment, as shown in Fig. 2.

If the piston be running, as shown in the iigures, as indicated by the red lines on the gures, the edge h, Fig. 2, will bear against the surface ot" the internal cylinder, C, and the steam will pass in by way ofthe pipe L and through the port M of the valve J,(see red arrows in Fig. 3,) While the escape-steam passes from before the piston ont of theannular steam-chamber, by way ot' the port M, into the condenser N. (See Fig. 4.)

To reverse the engine the spring Vv' is withdrawn from the notch f, in which it is placed, (see Fig. 1,) and is placed in the notch s, which has the effect of bearing or straining the valve J in the other direction, so that when freed from the contact of the piston the edge g, Fig. 2, of the abutment will close the steamspace, the steam be admitted through the port M., and be exhausted through the port M.

The machine will be found valuable for many purposes by direct attachmentof the saw, as shown in Fig.1, or the shaft ofa rotary pump, roiler, paddle, dri ring-wheel, or other mechanical device.

It will be seen that the e'ect of the steam upon the piston may be stopped by placing the spring in the notch p, when the steam is shut o' from entrance into the cylinder by inlets M or M', as is clearlyr shown in Fig. 3.

The reversal of the steam in this engine brings it to bear upon a di'erent side of the piston and is abso1nte,not depending upon the stoppage of the piston before the crank reaches its dead-point, asin reciprocating engines gcnerally, and in some rotary engines.

Having described my invention, what I claim therein as new, and desire to secure by Letters Patent, is

1. The arrangement ofthe condenser in direct connection with the two exhauseports, guarded by a reciprocating rotary abutmentvalve.

2. The described arrangement of the rotary engine, condenser, and chambered valve T, operating as described.

SIMEON SHERMAN.

Witnesses:

EDWARD H. KNIGHT, JAS. L. EWIN.

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