US238802A - Rotary engine - Google Patents

Description

(Noldel.)

2 Sheets--Sheet 1.

KPETERS. PHoruuTHOGRAbMEn. wArsmMutoN, n4 C.

(No Model.) I 2 Sheets- Sheet 2.

' A. N 0 T E M A N Rotary Engine.

Nc. 238,802. l Patented March 15,1881. Figi. a"

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UNITED STATES PATENT OEEICE.

ALONZO NOTEMAN, OF TOLEDO, OHIO.l

ROTARY, 'EN`GINE.

sPEcIFIcATIoNfOming part of Letters Patent No. aesoauated March 15, 1881;

l Application'led September 11, 1880. (No model.)

.Tojallwhom it may concern:

Beit known that I, ALoNzo NOTEMAN, a citizen of the United States, residing atlToledo, in the county of Lucas and State of Ohio,

`reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The object of this invention is to so construct the several parts of alrotary engine that thereshall benot only no loss of power, but that there shall` be an increased power by the utilization of the entire force of the steam.

It consists in the construction and arrangement of the= several parts, as hereinafter described, and pointed out in the claims.

In the drawings, Figure l is a vertical section on the line w a', Fig. 2, and Fig. 2 is a ver- -tical section on the line y y, Fig. l. Figs. 3 and 4 show one ot' the end plates of thecase, having the bearings recessed to receive a bronze or other suitable metal sleeve, which may be taken `out when worn and replaced by a new one. Fig. 5 is a diagram illustrating the manner ofwforming the steam -cylinder. Fig.6 shows side and edge views of the blade. Fig. 7 shows the split packing-rings which are pnt in the grooves in the disks orrotatin g heads of the piston. Fig. 8 shows a side and au end view offone-halfot' the piston. F ig.,9 shows an inside face and a cross-section ofone ofthe rotating piston-heads.4 Fig. 10 shows the outside Aface ot' one of `the rotating piston-heads, and Fig.ll shows the piston complete.

A is a casing, within which is contained the cylinderc. Theendsof the cylinderareclosed by the plates a a', which are provided with enlarged bearings, in which are putthe removable `bronze or other suitable metal -bearing rings or sleeves, a2 a2. The headplates c a are so formed andattached to the flanges a3 c3 thatannular chambers r4d4 are formed between their rims and the body ot`- the cylinder.

Below and connecting withthe cylinder by the port a5 is the exhaust-chamber b, which is provided with the exhaust-ports b2 b2. rlhe exhaust-chamber b is closed 'below by the-plate b', which forms lthe base on which the engine rests, and which provides the necessary facilities for securing the casing to the wood or other -su p portin g frame-work. y

c6 is a steam-inlet port connecting the pistonchamber with the chamber c, formed in the small valve-casing c', mounted on the main casw ing A. Within the chamber c is placed the cut-oftl valve el, which is seated over the end of the port a,6 and operated by shaft aF.

e is the steam-chest formed within the main casing A. It is formed and arranged to open, by the port e', into the chamber c in the valvecasing c', and it extends through the side stem, e2, Which is connected with the steam-snpply mechanism which connects the engine with the boiler. The steam-chest c is arrangedl to extend downward from `the upper port, e', parallel with the port a6, there being but a single wall or partition between it and said port c6. This arrangement brings the chest within the compass of the casingA,and gives a compactness in structure not attained in ordinary engines. The stem e2 projects -froln a point lo\v down on the casing, and thus provides an arrangement whereby the governor and other regulating mechanism can be placed in close juxtaposition to the cylinder. This arrangement of steam-chest prevents wire-drawing the steam through the steam-pipes by always having a supply of steam at hand tol-lill the cylinder. The parts, lying in such compact form, are not liable to be affected by cold-air currents, as when they are separated.

f is the revolving piston, composed of the equal and corresponding halves or sections f' f', which are secured to the rotary heads g g, which are xed to the revolving shafts It It. The shafts `It h are jonrnaled in the head-plate a of the cylinder a, as shown in Fig. 2. `The sections f f are slightly separated, so as to provide the channel f2 between them, through which the bladehereinafter described plays back and forth.

are beveled, lso as to form cup-shaped recesses or seats f3, in which the saddles orpnckingsegments of the blade are received,"as hereinafter explained. On the endsof the segments f there are formed tenons f4,"which iitinto mortises g in the rotary heads g and make a irm close joint. The segments are also pro- The outer edges of` sections IOO vided with short central mortises, f5,in which are put packing-pads f5, which snugly pack the blade as it moves to and fro in the channel f2. The rotary heads g have the circular rabbets g2 cut around the rims, into which are put the split packin g-rin gs When the piston, with its rotary heads, is put in place in the cylinder, the packing-rings fill in the angle v formed by the side of the cylinder, the inner cylinder a, Fig, l.

surface of the tlange a7 of the head-plate a', and the rim of the rotary heads g, as shown in Fig. 2. The packing-ring thus has a double bearing, and prevents the escape of steam outward between the cylinder and end plate, and also around the endof the rotary head. The rin g fi, being held thus unconfined or loosely on the rim of the rotary head, has a greater degree of adaptability or adjustment, and will make a better packing and be more durable than were it held rigidly in a channel in the rotary head, or in the cylinder, and packed outward in one direction only. rIhe rotary heads g have the cross-grooves g3, which coincide with the channels f2 and receive the edges of the sliding blade.

k is the blade which slides to and fro in the channel f2 in the revolving piston j'. Its edges itsnugly into the channels g3. On its opposite ends are formed the dovctail tenons k', onto which is slipped a knuckle, m, having a corresponding dovetail mortise. The knuckle m is made round, as shown. n is a packing saddle or segment, which has a round channel or mortise cut in its underor inner side, which is adapted to slip over the knuckle m. When slipped onto the knuckle, as shown in Fig. 6, it will have a rotating movement thereon, whichpermits it to adapt itself automatically to the different positions which the blade assumes in the rotation of the piston. The blade, the knuckle, and the saddle being made in separate pieces enables me to replace any part, when worn or broken, without replacing all.

The saddle n lis bifurcated, so as to provide two arms or bearing-heads, a2 a2, separated by an intermediate chamber or depression, a'. In this construction of the saddle I secure, substantially and in effect, an extended bearing-surface with very slight frictional contact. These blades move easier, have a more perfect adjustment, and make a more perfect adjustment than is attained by blades of ordinary construction.

I have constructed my cylinder on some geometrical principles, which I will now eX.- plain. These principles have been shown in engines heretofore patented, but have not been so accurately adapted as I have them.

In Fi g. 5 I have drawn a geometrical gure which illustrates my invention. By comparison it will be seen that this figure corresponds tothe contour of the chamber o in the In Fig. 5 I have drawn the outline o', which corresponds to the contour of thelcylinder, and within the outline o', I have drawn,in dotted lines, the circle o2, which represents the position of the piston j and its l give lateral motion to the blade.

relative position to the cylinder. The piston is seated in one side of the cylinder, its seat having 'the same curvature as its periphery. At l 1, I have marked the point where the line or contour o diverges from the circumference of the circle o2. From the points 1 1 lines are drawn through the center o3 of the circle 02, and are extended and intersect the contour o The segment between l and l and between 2 and 2 are segments of concentric circles. From the points l andl the contour o is drawn tangent to the circle o2, which tangents are extended to points 3 3, from which, iflines be drawn through the center o3 and extended to intersect the contour at 4 4, the said lines 3 4 and 3 4 will be of same length with lines 12 and l 2. rIhe curved lines 3 2 and 3 2, which connect the ends ofthe straight lines or tangents l 3 with the ends of the segment 2 2,

are gradually increasing or avoid curves from the points 3 to 2.

It will be seen that the chamber o in the cylinder a, Fig. 1, has the same form or contour as the geometric figure o in Fig. 5. The lines l 2 and 3 4 represent the blade k. The ports a6 and a5 are located at the termini of the tangent bearings l 3,1 3. The ovoid bearing-surfaces from 3 to 2 are the cams which They gradually increase in curvature from the ends of the tangent bearings till they unite in the concentric curve 2 2, or, reversely, they diminish gradually in curvature till they join with the tangents.

The piston revolves in the direction indicated by the arrows, Figs. l and 5. I he object of this peculiar form for the chamber o is to give a nicety and perfection of movement to the piston and its blade as they revolve, so that there shall be no back-pres-sure nor loss of force or motion, and whereby the amount ot' friction shall be reduced to the least possilole minimum, and wherein the entire action of the parts and the escape of the steam shall be noiseless. The saddle or blade-head a on one end of the blade, when it clears the circle 1 1 in contact with the piston, is forced out on the stra-ight line or tangent by the action of the opposite ovoid cam, 2 3, acting on the saddle on the other end of said blade. The tangent bearing permits the saddle to slide noiselessly past the inlet-port a6. The diminishing of the opposite ovoid cam-surface, 2 3, causes the saddle to move with steadiness and regularity, and without noise. The saddle on the opposite end of the blade slides as noiselessly past the exit-port a5, for reasons similar to those indicated above.

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

1. In a rotary engine, a removable knuckle or interposed retaining-bar placed on the end of the blade, and adapted lto carry the oscillating saddle, so that the latter will readily adjustitself in the revolutions of the piston, substantially as set forth.

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2. In a rotary engine, a blade having its ends provided with dovetail tenons, a removable knuckle having a dovetail mortise, which slides over the tenon on the blade, and the re- 5 movable saddle, which slides onto and has an oscillating movement thereon, substantiall y as set forth. i

3. In a rotary engine, the combination, with the cylinder a and the head-plates a', conro structed and secured to the cylinder a so as to provide circular chambers a4, ofthe piston-head plates g, provided with the rabbets g2 on the inner edges of their rims, and the packingrings i, placed in the rabbets g2, and bearing against the body of the cylinder and against 15 the inner surface of iange in the outer rim of the end plates, a', substantially as setforth.

In testimony whereof I a'ix my signature in presence of two witnesses. i

ALONZO OTE MAN.

Witnesses:

DUDLEY E. SALTONSTALL, J OEL M. GLoYD.

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