US527356A - Wxsixxotc - Google Patents

Description

4 Sheets-Sheet 1.

STEAM MOTOR.

Patented Oct. 9,1894.

(No Model.)

o. E. BBAUMONH. G. P. WALLINGTON.

(No Model.) 4 Sheets-Sheet 2.

C. E. BEAUMONT 8u G. P. WALLINGTON. `sTEAlvI MOTOR.

N0.527,356. Patented oct. 9,1894,

RW In e e h 4 AN wo .nml MG, N T1 L A W. .R Pm .O GM M wm NM 0 M U A E B E. UG. e d o M m N0. 527,356. Patented Oct. 9, 1894.

4 Sheets-Shea# 4. G. E. BEAUMONT 8v G. P. WALLINGTON.

STEAM MOTOR.

iNo Model.)

n No. 527,356.

` Patented Oct. 9,1894.4

WOZ'W my XW JW? UNITED STATES y PATENT OFFICE.N

CHARLES EVERARD BEAUMONT AND,` GEORGE PRYOE WALLINGTON, OF LON- DON, ENGLAND, ASSIGNORS OF ONE-THIRD TO LAURENCE "ARCHER WALLINGTOM or SAME PLACE.`

STEAM-MOTOR. f

SPECIFICATION forming part or Leners Patent No. 527,356, aatedotober 9,1894. Application filed` June 20.189,4.` Serial No. 515,112. (No model.) Patented in England December 20, 1893, No. 24,536.

.To all whom it may concern: p

Be it known that we, CHARLES AEVERARD BEAUMONT,residing at 16` South Grove, Peckman, and GEORGE PRYGE WALLINGTON, residing at 15 Bellenden Road, Peckman, London, England, subjects of the Queen `of Great i .Britain, have invented certain new 'anduse-` ful Improvements in and Connected Withi Steam and other Fluid-Pressure Motors andj `Io Pumps, (patented in Great Britain, No. 24:,536,l 4December 20,1893,) of which the following is a specification.

This invention relates primarilyto highv speed engines of the singleacting type, but` L 'I 5 it isalso applicable to double acting engines,

whether compound, condensing, non-condens-l ing-steam or other type of fluid pressure motoror pump and has: for its object the attainfment of a more perfect regulation of the adzo mission of steam to and release from thecyl-` `inder or cylinders by reciprocating a valve Y placed in `a hollow cylindrical extension of `the piston in a special manner whereby all the i functional requirements of this class of enz 5 gine, such as rapidopening of the inlet and exi haust ports, variable cut o, (predetermined `or otherwise,) and early closing of the exhaust for cushioning purposes are obtained without t the use of supplementary ports, or using the 3o before-mentioned hollow extension itself asa valve, as is the case when supplementary ports are` required. Moreover the central y valve is operated without undue obliquity of its connecting link.

4foregoing results consists in pivoting a radial i lever at one end toany suitable point in the crank chamber (if one be used)` or to any @fixed point and articulating the other end to 4o a connecting link for operating the central valve. y y y The before `mentioned radial lever 1s v1- brated by means of an intermediate link connected at one end to alever projecting at ap- 1 y 4 5` proximately right angles from the main con-1 necting rod, and the other end at any predetermined point on `the radial lever between` y thereto.

The method4 employed to accomplish the its fulcrum, and theend to which the beforementioned valve link is attached o'r it may y be at theend and the valve link occupy the 5o intermediate position. n

y In order that our invention, may be completely understood the accompanying drawings are appended in which like letters are used to denote like parts throughout the several figures.

.n `Figure 1, represents a transverse sectional elevation of a complete simple single acting high speed engine with our invention applied n Fig. 2, is a partfront sectionalele- 6o vation of the same."` Fig. 3, isa perspective View of the valve gear and connecting rod. Fig.` 1l, is a sectional elevation of the piston and hollow extension thereof showing another 1 method of attachingthe gear to thefcentral valve. Figs. 5to l0 inclusive `are `diagrams illustrating the dierent` positions of the valve and gear during one revolution of the Grankr i t In carrying out our invention as applied to 7o a high speed engine ofthe simplesingle acting type of the class generally known as` central valve engines, that is to say, engines in which a piston valve is fitted within a hollow extension of the main piston or rod,

we fulcrurn or pivot the end of a lever A, hereinafter termed a radial lever, at a predetermined xed point of the crank chamber Bpreferably within arecess .C formed on one side of the crank chamber as shown in Fig. 8o

`1.` The other end of the radial lever A is forked, see Fig. 3, to receive the lower ends of the valve and intermediate links D and E respectively, they being looselylpivoted there- .y

to by the pins c, d, fitted in thefork end. S5-

The top end of the link D is pivoted in any suitable manner to the central valve F, and that of the intermediate link E to a lever or levers G projecting at approximate right an-`V gles from the mainconnecting rod or rods H, 9o H, of which it or they form a part. The main `connecting rods H, H, `are connected by brasses to the crank I and by gudgeons J to the piston guide K in the usual manner, and

are divided, as shown more particularly at Fig. 3, to allow the radial lever A, valve and intermediate links D and E, respectively, to vibrate centrally between them, so that the central valve itself can be operated without any undue Obliquity of the connecting rods,

n as will be quite evident upon referring to Figs. 5 to 10 inclusive. 4

When ttng an engine with a radial lever ro A connected in the manner shown in Figs. l and 2and 5 to 10 inclusive, We preferably employ a central valve F having two pistons L, M, connected by a rod N, one piston L controlling the steam ports Z and the other piston M controllingthe exhaust ports m both of which arecut in the hollow extension P 0f the piston, so thatsteam on entering the ports Z passes down the hollow extension P through the ports fn, to the cylinder Q to exert pressure zo upon the piston R forcing it down to perform Work upon-the crank l by means o f the connecting rod or rods H H, lin the well known manner. 'When the stroke is completed the port fm, is-uncovered and the steam esca-pes 2 5 into the space between the piston'R and guide Kwhich communicates with the atmosphere or condenser, as the case may be, by the outv let S in the cylinder side, thepositicn of such outlet being so arranged that it is never at 3o any time covered by the movement of the pisltenor the Apiston guide, as can be seen4 upon referring tothe diagrams. j

Sometimes it may be more .convenient to `use a longer radial lever A and 'attachgthe i 3 5l valve linkv D to the said lever in the inte-rme, diate position but still immediately guident-,he

central valve, the A projecting lever or 'levers :G being arranged upon the opposite side to; j that-shown in Fig. Al, and the links E connected 4o to the end of the levers as shown in Fig. 4." In

this case a single piston is used as the central valve and a single port in the hollow exten-` sion, the movement ofA the .valve being such that it alternately moves below the ports forl steam inlet and above said ports for exhausting immediately into the crank chamber below, or into the space between the piston and guide.

By fulcruming a radial lever A to a fixed. 5o point upon a nonemoving part ofthe engine,

such asthe crank chamber B, andcausing it; to act as a lever of'the third kind by apply-- ing the power derived from the movement of,

Y the connecting rodsH, H, through the lever 5 '5 G and link E intermediateof its fulcrum and.y

, thepoint of application ofthe power to move thecentral valve, as shown'in Fig. 1,'or cansing the radial lever A toact as a lever of the second kind by arranging the link D for movf 6o ing the valve between lthe fulcru-m and the power as shown in Fig.Y 4,-we are enabled tor -ebtain a differential movement'of the val-ve .relatively to that of the hollow extension4v within which said valve is itted, whereby-all! the functional requirements of Ya high speed engine, such as rapid opening of the ports to steam and exhaust, variablelap and lead and early closing of the exhaust for cushioning purposes are obtained without the use of auxiliary ports and chambers such as are required in engines fitted with valve gear that only actuates samein a mannerequivaleht toan eccentric set atiright angles to the crank.

The .hereinbefore mentioned proposition with regard to rapid opening and closing of the various ports in their sequential order durv ing one revolution of the crank, and the relative positions the radial lever A, valve and intermediate links D, E, and main connecting rods H occupy-Will be completelyunderstood upon referencevto the diagrams Figs. 5 to 10 Inall the iigures the crank; is rotated in the direction indicated by the arrows.

Fig. 5 represents the crank at the position in which the ypiston L isabout to uncover the port l, the distance from this point to the top vcenter representing theamount of lead given to the engine from this position until the piston in descending moves the crank to an angle 9o of about forty-five degrees, as indicated at Fig-6, the port Z is rapidly uncovered, it be l ing now fullyr open. VSteam is cut o at approximately half stroke, as at Fig. 7, in 'which it will be seen that the Vsteam already admitdted to the cylinder is used expansively until the piston is almost atthebottom of its stroke, as at Fig. 8, the crank then being near its bottom center and the exhaust port lml -just about to open. By a very. small movementv of the crank past its bottom center the ex#- haust port m Vis fully uncovered, as at Fig. 9, to allow the-steam to escape upon the uprising o f the piston 'to the position shown in Fig.l 10, the crank being then about fifty degrees from the top center, and the exhaust IOO i and inlet ports'covered to allowr compression of the remaining steam to takeplace, and act as a cushion to keep the parts in constantl thrust and prevent all knocking.

What we claim, and desire to'secure by Let-v tersPatent, is 1. In a central valve high speed engine,

fluidmotor or pump, the combination with the main connecting rod or rods and projec- Vtions thereon, of a radial arm having'one end pivoted to anon-movingpar't of the enginey at a predetermined point in the-.crankcham-V ber, a link connecting said, arm with the projections on the main connecting rod or rods, and a link connecting the said leverwith the centrally located valve, substantially as and for the purpose shown and described. j 2. In a; central valve high speed engine, iiuid motor or pump, the combination of the crank I, the piston Rhaving a tubular rod provided with ports and guide portion K, the'v cylinder, the ypistonA valve'F, therod or rods `ro In Witness whereof we have hereto signed Zcmd.

H connecting the crank I and piston guide K, our names, in the presence of two subscribing the radial arm A having one end pivoted to Witnesses, this 28th day of May, 1894. a. non-moving part of the engine at a prede- 1 termined point in the crank chamber, the link T 5 D connecting the valve F with the end of the i arm A and the link E connectinga. projection Witnesses: .G on the main connecting rod Hwith the 1e- HENRY GARDNER, ver A at a point intermediate itsends, sub- RICHARD CORE GARDNER, "stantially as and for the purpose described. Patent Agents, 166 Fleet Street, London, Eng-

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