US1237987A - Simple-compound locomotive. - Google Patents

Description

G. F. WIESECKEL.

SIMPLE COMPOUND LOCOMOTIVE.

APPucAnoN nuzo ma. 20. 1917:

W 9 mw w W mm f, w 0

G. F. WIESECKEL. SIMPLE COMPOUN) LOCOMOTIYE.

G. F. WIESEKEL.

SHVIPLE COMPOUND LOGOMO'TIVE.

'APPLVxcAnoN mam nas. 20, mi. 1917 3 sHETs-sHEET 3.

Patented Aug. 21,

.,. Vafter, is the feature of MED nA'GERsToWN, MARYLAND.

SIMPLE-COMEOUND LOCOMOTIVE.

specification of Letters Patent. Penfjd Aug. 21, 1917.

Application iiiea rebruai- 20, 1917r.., seriai'no. 148,802.

To all w/wm it mag] camera: i

Be it known that I, GEORGE F. WiEsiionnL,

a citizen of the United States, and resident of Hagerstowii, Maryland, have invented certain new and useful Improvements iii Simple-Gompound Locomotives, of which the :following is a specification.

The invention is an i'inproy'emeiit .in that type of locomotive known the, Mallet capable of Operating either preventing damage to the steam distribution valve of the low pressure cylinder when the engine which, o in ordinary practice is due (lriftiiig, tothe lodgment of dust, ciiiders and combus-` tioii productsiii thesteain chest of said cylinder because of the Isuction action of the low` pressure piston drawing the foreignV Fig.` 2 is a horizontal sectional view ofV the intercepting valve in position for the operation of the locomotive under the simple system. y y

Fig. 3 isasimilar view of saidinterceptmg valve 111 position for oompound operao tion of the locoinotive.

Fig. 3a is a sideyiew of the intercept` iiig; valve casing.`

Fig. 4, is a planyiewlof thechecltvalve oasing` and associated parts; n,

Fig. 5 is a sectioiial View o f the checkcas- 111g and associated parts.

In i Operating thelocomotire under the simple system steam from the dome VA passes through the throttle B, dry pipe O, header D, superheater E and to the steam pipeiF, thence to `the chest l;Gr of piston Valve H, Vwhich controls the steam supply to the pressure cylinder `From this cylinder the steam exhausts through the end of ,the

ohest G, thence thip'ouh the casing` J' of the interoepting Valve J, and through the emer-, i

gency or separate exhaust pipe KNpast check` valve L, which ascwill be pointed out herem-l i F through the .br

(',eptingvalve cha-mber, this Valve being,` in` under the simple i system or the compound system, 5my object `vbeing to provide means for means i at the check valve,

my iniprovejinent, to i the eniergencyor separate eXhaust M con-` sistiiig of a shell or casing surroundinglthe main exhaust N and from here the blows up through the stacl: O.

Live steam under passesfrom the simplell position from whence it passes as orric, ,i

GEoRGE FRANK WIESEGKEL, ormennsrown, MARYLAND, AssIGNon or ONE-HALE `'ro HARRY R. WRNOCK, or i exhaust full looilei'` pressure also i l'iigh pressure steam pipe` anch plpe toV the interi;

will be nioi'e partieulai'ly described hereinafter,rdiiteot to the receiver pipe Q, steam i Ghost-R, slide valve S, the low' pressure cyl inder T and exhaust V. This system of steam distribution is old and well known,

and except for the check valve L and asso-` ciated parts, described later, the elements desci'ibed have beeiiiii use prior to niy iiiventioii.

Dui-ing vtlie time that the locomotive is 'Operating under the simple system, the ino tercepting Valve J is in the position shown in Fig. 2, vhaving been-moved into this position by, the engineer setting the valve '(not shown) in the cab to supply. steam through the pipe l to the Chamber 2, where it acts on al piston 2' and forces the intercepting Valve to its seat 3, as shown in Fig. 2, a

This -permits the exhaust fromV the high z pressure cylindei's to pass by way of the passages to the VValve casing as shown 'by the full' arrowsvto the'sepalrateor einerg'ency eXhaust pipe K, which directs it to the stack. The check valve Lis lield open during this time, for the free passage of the eXhaust,-

the function of which will be i by steam pressure,'delivered toV controlling` being delivfered throughfthe pipe l, which is an extension of branch of the pipe l.:

this steam supply o o Thesteam Vdelivered through the branch pipe P inlto the casing of the passesout through the discharge 11 of the intercelting valve casing into the receivei'i ited, i direct lto the' ie'ylmder. Thel pipe Q, and, as' before Steamfzhaf ef 'the :Pit

I intercepting yf valve enters Vthemchainber 5 aiid passes ``1n`` general course of the steam just described from plpe P to.. the receiver pipe Q is indicated by the dotted arrows in Figi.Y 2.

Oompoimd system.

When' the engineer desires to operate the locom'otive under the compound system, instead of under the simple system, he manipulates the *simple valve in the cab to releasefthegsteam pressure from pipe 1 and i the pistn chamber)J vof'v the intercepting valve mechanism and also from the pipe 1*. As a result of releasing pressure from chamberV 2 the'intercepting valve will leave its seat' 3 and seat itself at 3x, thus closing the communication between the high pressure which Vas cepting valve is seated at 3, because of the release of pressure from the' Chamber 2 and because of the pressure of spring 12.

During o operation under the compound system the intercepting valve J will remain closed, 'as shown in Fig. 3, on its seat 3 and steam exhausting from the high pressure ;release of pressurey from the cylinder will be delivered to the low pressure cylinder T;

If the engineer now allows the locomotive to drift, by cutting off steam at the throttle,

a suction will be created in the emergency exhaust pipe K, under the practice existing prior to my invention, and dust, cinders and combusti'on products which have collected in ,this pipe during the compound working will "be drawn through the intercepting valve casing, pipe Q to the steam chest of the low pressure cylinder,- resulting in Cutting of the valves'and valve seat of the low pressure cylinders,

which effect is auginented by the` fact that the dust, cinders, `&c,, absorb the lub'ricant. To,V prevent this drawing back into'the' system of the dust, &c., from the stack' the check valveL is provided. This is open during operation under the simple operation Vis changedV to the compound systemfthis check valve closes the emergency exha'us't pipe K, this closing being due to the 4 pipe 1`which ``takesjplace at thesame time that pressure valve is. 'allowed created by the piston isreleased ,from pipe 1 and the intercepting to set itself in the compound position of Fig. 3.

vIt will be understood that the suction.

of the 10W pressureV cylinder, while Hdrifting, produces suction ,o in the emergency. exhaust pipe, under prior practice, notwithstanding the fact that the intercepting valve J' is closed on its seat 3 because this valve being held under spring pressure will open and close'as the low pressure piston reciprocates.

It will be observed further that the check valve is set in closed lposition at the time the system isl changed by the en gineer from simple to compound working but it is not called upon to prevent back pressure in the exhaust pipe K until the engineer cuts off steam at the throttle and allows the engine to drift.

The collection of dustin the emergency exhaust pipe during the compound working of the system is due to the fact that the discharge of steam through the main eX- haust N is sufliiciently strong to suck up cinders Vwhich have collected at the bottom of the chamber in which the eXhaust is located and some of these cinders being drawn to the annular space between the main and emergency exhausts N and M will be deposited in the emergency exhaust pipe, and then when the engine is drifting, if no check valve were present, this collection of dust and cinders would be drawn back through the intercepting valve and the pipe Q to the valve casing of the low pressure cylinder due to the suction created by the low pressure piston. Itmay be asked why cinders will not pass back through the main eXhaust pipe V, but it will be noted that such action cannot take place while the vengine is working either under the simple or compound systems becausethe eXhaust steam is passing out through this pipe under both of 'these systems of working` and while the engine is dr'ifting any back suctioncreated through the said exhaust pipe V will not be suflicient to lift cinders up from the bottom of the chamber in which the main exhaust N is located and hence no cinders will be drawn directly into this pipe7 but the suction created by the low pressure pistonin drifting would be sufiicient were the check valve L not present to draw ,dust and cinders, which had collected in the emergency eX- haust pipe during compound working, back through the intercepting valve and the pipe Q, into the low pressure engine.

It willl be understood that with the check valve present cinders will. collect in the emergency eXhaust pipe beyond the check valve, that is between it and the emergency eXhaust M'but such einders and dustwill be blown out through the stack as soon as the operation of the engine under simple working is resumed,

The check valve is in the form of a fiap valve pivotally mounted at 13 in its casing and closing upon an inclined seat 13'. Its pivot shaft has an arm 14 connected by a link or head 15 with the rod ofa piston 16 in a' cylinder 17', mounted on the casing. A spring 18 bearing on the piston tends to throw the [valve onto its seattto close the emergency exhaust pipe and the pipe' 1*' changi ng the gainst which the Supplies thesteam pressure `'to the opposite side of the piston when the simple Valve m the cal) is set in simple position and thus the steam pressure acting'in opposition to the spring will throw the Valve to its open position for operation under the simple system.

When steam is released from 'the pipe l for position of the intercepting 'Valve for compou'nd working the steam pressure is simultaneously released from the pipe lx and thorefore from the cylinder 17 allowiug the spring to close the valve and prerent suction hack therethrough `when steam is 'cut off at the th'rottle and the low pressure engine acts asa suction pump consequent upon the drifting of the engine.

An adjustahle stop is provided at 18 'check valve Strikes when it opens. This stop is screw-threaded and fits in a. screw-threaded opening extending at theproper inclination through the valve casing to suit the 'incline of the Valve. The

` stop is held by a nut 19,. By` removing this stop then a suitable implement may he intro-` duced through the lnchned opening to grind' the Valve seat. i

Havin'g thus fully descrlbed my invention i what I claim is:

r der,

pressure cylinder, an` emergency exhaust eX- tendin' from the hio'h Dressurec hnder and 2D b i. 7

1. A locomotiye engine comprising a high pressure cylmder, and a low pressure cylinan exhaustvextending from the lowa connection to supply steam from the high to the low pressure cylinder, means for i changing the engine from a simple to a compound system of operation and means for iprcrenting' the low pressure pistonfrom drawing dustifrom` the emergency exhaust of the high pressure cylinder lnto the steam vchest of said low pressure cylinder when the g, substantially as descrihed. locomotive engine comprising a high pressure cylinder,` and a low pressure cylinder, an exhaust extending from the .low pressure cylinder, an emergency eX- haust extending fromV the high pressure cylinders, and a connection to supply steam from the high to the low pressure cylinder, means for changing the engine from a simple to a componnd system of operation and means for preventing the low pressure piston from drawing dust from the emergency exhaust of the high pressure cylinder into the steam chest of said low pressure cylinder when the engine is, drifting, said means comprising a Valve in the said emergency exhaust from the high pressure cylinder.

3. A locomotive engine comprising a high pressure cylinder and a low pressure cylinder, an exhaust extending from the low'pressure cylinder, an emergency exhaust extending from the high pressure cylinder, and a connection to supply steam from the high to engine is driftin' the low pressurecylinder, means for changing the engine from a simple'to a compound system of operation and means for preventing the low pressure piston from drawing dust from the emergency cxhaust ofthe high pressure cylinder, and through the supply port of and into the steam chest of said low pressure cylinder when the engine is drifting, said means comprising a valve in the emergency exhaust of the high pressure cylinder which is automatically operated for the simple operation of the locomotive and automatically closed when the system is changed from simple to compound working, substantially as described.

4. A locomotive engine comprising a high pressure cylinder and a losT pressure cylinder, an exhaust extending from the low pressure cylinder, an emergency exhaust extending from the high pressure cylinder, and a connection to supply steam from the high to the len1 pressure cylinder, means for changing the engine from a simple to a compound system of operation and means foi' prerenting the low pressure piston from drawing dust from the emergency exhaust ofl the hig i pressure cylinder and through the supply port of and into the steam chest of said low pressure cylinder when the engine is drifting, said means comprising a Valve in thesaid emergency exhaust of the high pressure cylinder, with controlling means therefor operated by steam pressure when the worl'cing of the locomotive'is changed from one system to the other.

A locomotivel engine comprising a high and a low pressure cylinder, a connection for supplying steam from the eXhaust of the high to the low pressure cylinder for compound working, an intercepting 'valve controlling said connection, means for supplying steam at full boiler pressure to the high pressure cylinder, and to the intercepting Valve to be delivered therethrough to the low pressure cylinder for simple working, an emergency exhaust for the high pressure cylinder controlledby said intercepting Valve, and automatically Operating means for closing said emergency eXh-aust, when the system is changed from simple to compound working to prevent suction created by the low pressure piston when drifting from drawing cinders from said emergency eXhaust into the steam chest of the low pressure cylinder, substantially as descrihed.

6. A locomotive engine comprising a high and a low pressure cylinder, a connection for supplying steam from the exhaust of the high to the low pressure cylinder for compound working, an intercepting Valve controlling' said connection, means for supplying steam at full boiler pressure to the high pressure cylinder, and to the intercepting valve to be delirered therethrough to the low pressure cylinder for simple working,'an emergeney exhaust for the high pressure cylinder controlled by said intercepting Valve, and automatically Operating means closing` toward the said intercepting valve for closing` said emergenoy exhaust, when the system is changed from simple to compound working to prevent suction back through said emergency exhaust when the engine is drifting, said. intercepting,` valve being,` controlled by steam pressure from the simple valve in the cab and said automatically Operating emergency exhaust closer boing simultaneously Controlled by the same Steam pressure, substantially as described.

7 lin combination and a low pressure cylinder with a connection between them to deliver exhaust steam from the high to the low pressure cylinder, an intercepting Valve in said connection, an emergency eXhaust pipe for the high pressure cylinder controlled by said intercepting` valve to direct the exhaust steam to theV for the low pressure stack, a steam supply by the intercepting cylinder Controlled vvalve, a check Valve in the emergency eX- haust pipe closmg,` toward theintercepting` substan- Copies of this'patent may be obtained for in a locomotive, a high it during comi for thethigh pres- I five cents each, Washington, D. G."

sure cylinder Controlled by said intercepting valve to directthe exhaust steam to the stack, a steam supply for the low pressure cylinder controlled by the intercepting valve, a check valve in the emergency exhaust pipe olosing toward'the intercepting Valve, and means for controlling said check valve to open it during simple operation o-f the locomotive and to close it during compound operation ofl the locomotive, the said check Valve Controlled means.` and intercepting valve being` operated by steam pressure simultaneously.

9. In combination a high pressure cylinder, a low pressure cylinder, exhaust pipes extending from each, running` to the stack, anintercepting Valve receiving` the exhaust from the high vpressure cylinder, a branch steam supplypipe leading tothe intercepting` valve, a plpe leading from the intercepting Valve to the low pressure cylinder to supply either superheated steam or exhaust steam thereto, a connection for setting said valve in either simple position for supplyi'ng superheated steam to the low pressure cylinder or to compound position to supply exhaust steam ther'eto, and means operating simultaneously with said valve when set in compound position for closing the exhaust of the' high pressure cylinder between the intercepting valve and the stack against the suction from the low pressure cylinder when the engine is drifting, substantially as described. o

In testimony whereof, I aflix my signature;

GEORGE FRANK VIESECKEL.

by addressing the Commssioner of Patents.

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