US1531004A

US1531004A - Injector

Info

Publication number: US1531004A
Application number: US699165A
Authority: US
Inventors: Hard Malcolm; William A Buckbee
Original assignee: Superheater Co Ltd
Current assignee: Superheater Co Ltd; Superheater Co
Priority date: 1924-03-14
Filing date: 1924-03-14
Publication date: 1925-03-24
Anticipated expiration: 1942-03-24

Description

March 24, 1925. 1,531,004

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DCI r-i III W/T/VESS 7g. COMM Patented Mar. 24, 1925. y i i l UNITED sTATEs PATENT OFFICE.

MALCOLM HARD, F FLUSHING, AND WILLIAM A. BUCKBEE, 0F NYACK, NEW YORK, ASSIGNOBS T0 THE SUPEEHEATER COMPANY, 0F NEW YORK, N'. Y., A CORPORA- TION OF DELAWARE.

applicati@ :nea laren 14, 1924. serial No. 899,165.

To all whom 'it may concern.' 5 ',of,.sl 1owing in an illustrative but not in a Be it known that we, MALCOLM HARD and limiting sense an embodiment of our inven VVTLLIAM A; BUCKBEE, both citizens of the ytlon. A

United States, and residents of Flushing, In the-drawings Fig. 1 isa side elevation 55 5 county of Queens, State of New York, and showmg somewhat diagrammatically an in- Nyack, county of Rockland, and State of stallation of an exhaust steam injector, em- New York, respectivel have invented cerbodying our invention, on a steam locomotain new and useful m rovements in Intive, aportion of the locomotive being shown jectors, of which the fol owing is .a speciin dotted lines. 6o

fcation. Fig. 2is a front elevation of-thelmain This invention relates to steam injectors control valve with lthe automatic valve at-A and particularly to that type thereof that is tached thereto.

operated by the exhaust steam from an en- Figs. 3 and 4 are side and top views regine. While the use of such injectors has spectively of the structure shown in Fig-2. 65

resulted in savings of from 10 to 15%'of the Fig. 5 is a section on the line 5--5 of fuel and water consumption of the steam Fior. 6. j I locomotive, their installation has necessitated Fig. 6 is a section 0n the line 6-6 of the addition of a number of manual controls Fi 4.

which, if the maximum eliciency of the in# `ig. 7 is a section on the line 7-7' of 70 jector is to be obtained, require frequent Fi 6.

manipulation by the engine-man. Their ig. 8 is a detail front view ofthe main installation has met with considerable oppocontrol v alve casing-With the front portion sition from trainmen because of the impres- -thereof removed, to show clearly the steam sion 'that these injectors are too diflicult and ports and conduits of said valve casing. 75 complicated to operate, and it has been Figs. 9 to 12 inclusive are detail sections found that, in many instances, they have of the main control valve casing taken on been operated in a wasteful and ineliicient the line 6-6of Fig. 4 and showing dilermanner. This has prevented the more -unient positions of the main control valve with versal and general adoption of exhaust respect to the ports of the valve casing. so :zo steam injectors as a art of the equipment Fig. 13 is an elevation of the main* conof the modern steam ocomotive. p trol valve as seen from the side thereof It is the principal object of this invention which engages the valve seat of the main to'provide a new and improved construction control valve casing.

by means of which the multiplicit; of manu- Fig. 14 is a central vertical section 85 ally operated control valves of t e-exhaust through the duplex valve.

steam injectors are replaced by semi-auto- Figs. 154 and v16 are sections on the, lines matically operated valves, the operationof 15-15 and 16-16 of Fig.` 14.I

which is controlled by a single main control Fig. 17 is a central, vertical, longitudinal valve, so that slight manipulations of a section through the injector'.` 90 40 single control permit the injector control Fig. 18 is a top view, partly in section,

valves to be set in any of the positions reof the injector. j

quired by the changing conditions encoun- Fig.,19 is a section on the line 19-19 of tered in the operation of the engine. Fig. 18,

This and such further objects as practi- Fig. 2O is a sectional detail of the injector 95 cability of installation on existing equipshowing the conduits leading to the exhaust ment, sturdiness of construction and assursteam valve operating piston, and Ithe con'- ance of operation under .all conditions, will duits for -t-he auxiliary and supplementary be a parent to those skilled in the art to live steam. whic 1 this invention appertains by reference Referring to Figs. 1 and 17 of the draw- 100 to the following specification and to the acing a preferred installation of an exhaust companying drawings forming a part heresteam injector in accordance with the princi- The exhaust steam injector A.

The exhaust steam injector shown in Figs. 17 to 20 of the drawing, which is of the type disclosed in United States Patent No. 1,342,128, granted June '1,` 1920 to J. Metcalfe, et al., is provided with a main exhaust v steam nozzle 25,`a water cone or preliminary mixing land inthe form. shown,

nozzle 26 into which the water issues with the exhaust steam from the main exhaust steam nozzle; a combining nozzle 27; a delivery nozzle 28; avfurther preliminary mixing nozzle 29 between the water cone 26 and the combining nozzle 27, and a supplementary live steam nozzle 30. Exhaust steam from the engine is ledto the exhaust steam chamber 31 ot' the injector by the pipe 32, an exhaust steam valve 33is pivotally suspended within the chamber 31,v adjacent to the connection of the pipe 32 to the injector, by means of the link 34, thelower end o which link is secured to the valve, by means of the bolt 35 and the upper end thereof is pivotally mountedon the pivot pin 36. A valve seat 37 is provided, against which the valve 33 is adapted :to be seated to shut oi communication between the pipe 32 and chamber 31.

That portion of the injector casing which definesthe exhaust steam chamber 31, has a web` 38 rojecting into said chamber from one side t porting means for the supplementary live steam nozzle 30, and which is also cored out to provide the

steam passages

39 and 40 for the supplementary and auxiliary live steam supplied through the pipes 39a'and 40 respectively. In the Metcalfe type injector, the main exhaust steam nozzle 25 is mounted for movement longitudinally of the injector to 'vary the size of the annular passage through which the water passes, between said nozzle and the water cone 26, and for this purpose a shaft 41, suitably mounted for rotation upon the injector, has one end thereof adjacent to said main exhaust nozzle 25 provided with a crank pin 42 eccentrically located to the axis of said shaft andv in engagement with saidnozzle, .whereby adjustment of the handle 41* located -in the cab, and connected by the linkage 41b willrotate said shaft and causesaid nozzle 25 to be adjusted longitudinally of the injector. A one waycheck valve 43 is rovided adjacent to the connection of the eliverjT pipe 43a for preventing back low of the water from the ereof, which web serves as a sup- P boiler to the injector and an automatic overflow valve 44 (Fig. 19) is provided, which,

when the injector is working, seals the overflow chamber 45 and prevents admission of air to the injector through the overflow pipe 45. A portion of the upper half of the combining nozzle 27 is separable from the main ortion thereof to form a a 27a which isnormally seatedin the position s own in Fig. 17,.but-which moves upwardly when the pressure of the steam and (or) water within the injector exceeds a certain amount, to allow the escape of the steam and water through the comparatively large bore of the nozzle, adjacent to the nozzle 29, into the overflow chamber 45. The provision of this flaplensures the prompt starting and the automatic working of the injector. The construction of the injector described above is the usual construction of the Metcalfe t'ype of exhaust steam injector and has been de- 'scribed herein in order that the operation of our improved control system may be more clearly understood.

The emha'ust steam 'vulve operating means B.

In place of the manually operated control means usually provided for the exhaust steam valve 33 the lfollowing means is provided :-The web 38 which extends into the exhaust steam chamber 31 of the injector is extended towards the valve 33 and is bored out to provide 'a' small cylinder 46 in which a piston 47 is slidably mounted. A piston rod 4S, one end of which is suitably secured to y the piston 47, has its other end projectin towards the bolt 35, with which it is adapted to engage to force the valve 33 against its seat, when the piston 47 is moved outwardly of its cylinder. Steam or other fluid under ressure is admitted to the cylinder, under control of the main control valve D, through the steam passage 49, (Fig.l 20), which is connected to the main control valve by the pipe 50.

WhileV the piston 47 is of much smaller cross sectional area than the valve 33, sui- `cient pressure will be exerted thereby to hold the valve to its seat because of the great difference in pressure between the live steam which acts againsty the piston and the exhaust steam which acts against the .valve The water admission val/ve 0.

The water admission valve C, (Fig. 17) consists of a casing 51 in the form of an L, one branch of which is bolted tothe injector cured thereto the water 'supply pipe 52 which leads to the water tank. A valve seat'53, provided in the casing 51, is adapted to be engaged by the valve 54the stem 55 of which projects through a bearing 56, and has secured to its outer end a piston 57. The piston 57 is slidably mounted within a cylinand the other branch of which has se- -76 (see Figs. 5 and 7),

der 58 formedin the casing 52 and a small cylinder head 59wl1ich closes the outer end of said cylinder, is provided with a screw threaded aperture 60, by means of which the pipe 61 which leads to the main control valve D is connected to the cylinder. A coiled spring 62 is mounted between the inner endof the cylinder 58 and the piston 57 and serves to hold the valve 54 normally seated upon its seat. A pi e 63, which leads from the casing of the dup ex valve E, serves )to conduct live steam from said casing to the casing 52 of the water admission valve C, to prevent freezing of the Water in said valve or lits supply pipe, or for thawing anyice which might form in said casing during freezing weather, when the injector is not in use; a valve 63a being provided in said plpe.

The main control val/ve D.

sector-shaped flange 67, having at the ends,

of the upper face thereof, the

shoulders

68 and 69, (Fig. 2) and between said shoulders the notched portions 70, 7l and 72'. An actuating handle 73, which is secured to the valve stem 74, is providedI with a spring pressed pawl adapted to engage with said shoulders and notches to serve as an indicating means for the various operative positions of -the valve and to hold said valve in said positions. The inner end of the valve stem 74 is provided with a rib ably within a groove-77 formed by a pair ofi-ibs 78 pro3ecting from the outer face of the valve 79. The valve 79 is rotatably mounted within a valve chamber 80, formed within the casing part 65, one wall of which chamber is formed by the casing part 64. The valve body, as shown in Fig. 13 of the drawing, is provided with the through apertures which form the live steam portsv 81 and 82, and the side of the valve body which engages the valve seat 85 is provided with a recess 83 consisting of a large, sector 83l and a small sector 83". Live steam is admitted to the valve member by means of a pipe 84 which leads to the steam dome or turret of the locomotive. The inner face 85 of the casing .part 64 forms the seat for the valve 79 and said face is provided with a plurality of

ports

86, 87, 88, 89, and 90, (see Fig. 8) which communicate with the

steam passages

91, 92, 93, 94 and 95 respectively. The port 86 and passage 91 communicate with the pipe 50 which connects thel main control valve with the exhaust steam valve operating means B; the port 87 and assage 9 2 communicate with the pipe 61 W ch'leads to the water admiswhich engages slid` sion valve C; the port 88 and passage 93 'of the casing part-64, which bore 'has secured therein one end of a pipe which leads to the ash pan of the locomotive and serves to rmit the escape of steam from the various ports and passages of the main control lines when the main control valve 79 is actuated to bring the portion 83 thereof in alignment with said ports and passages.

' The duplex 'vave E. (Figs. 14 to 16.)

The duplex valve El contains a pair of

valve members

101 and 102 which govern. the admission of. the auxiliary and supplementary live steam respectively to the injector A. The casing 103 of the duplex valve E forms ashallow, substantially rectangular shaped member having at the upper end thereof a threaded nipple 104 to which is connected the pipe 105 which leads to the steam turret of the locomotive and delivers live steam to the casing 103. pipe 105 communicates with a conduit 106 formed in the casing 103, and the

valves

101 and 102 are normally held against their seats 107 and 108 respectively by the pressure of the steam within said conduits. The valve 101 is provided with a valve stem 109, which is slidably mounted within a bearing 110 formed in the casing 103, and said valve stem is connected to a piston 111 slidably mounted within a cylinder 112 formed in the casing 103. A cylinder head 113, which closes the end of the cylinder 112, is provided with a threaded aperture 114 whichl furnishes a means for connecting the pipe 115 thereto, said pipe leading from the automatic valve F. The valve 102 is provided with the valve stem 116, piston 117, cylinder 118, cylinder head 119 and aperture 120 of the `same construction as the parts for the valve 101, but the pipe which is connected tothe cylinder head 120 is theV pipe 96 hereinbefore referred to which leads to the control valve D. When valve 101 is opened by the action of piston 111, live steam passes from the conduit 106 into the branched conduit 121, by which it is delivered to ,the .auxiliary l1ve steam pipe 40 The lll)

llt)

which leads to the injector, the path of the steam being indicated by the arrows and lines designated by the letters m in Figs. 14, 15 and 16 of the drawing. When valve 102 is opened by the action of piston 117, the live steam passes from the conduit 106 into the conduit 122, by which it is delivered to the supplementary live steam pipe 39l which leads to the injector, the path of the steam through theu conduit 122 being indicated by the arrows and lines designated by the letters Y, in Figs. 14, 15 and 16.

It will be noted that the pistons 111 and 117 are sufficiently larger in area than the

valves

101 and 102 respectively to insure the opening of said valves against the pressure of the steam within conduit 106 when steam is admitted into .the

cylinders

112, 118.

Each of the

valves

101 and 102 is provided with manually adjustable' means, which can be set to regulate the'extent of opening of said valves, and such means comprises a stop rod 123 for each valve located in axial alignment with its respective valve and valve stem, butv unsecured thereto. Each stop rod 123, is provided with` a screw threaded portion 124 which engages with is bolted to the main control valve cooperating screw threads formed in a screw threaded plug 125, engaged in the wall of the casing 103. Each plug 125 is provided with a stutling boX 126 through which the stop rod 123 projects, and the outer end of each rod is connected by a universal joint 127 with an adjusting rod 128 provided with an operating handle 129.

A bore 130 is provided in the casing 103 for the passage of a bolt, by means of which said casing is bolted to the boiler or other suitable support. It will be noted that the pipe 63 for leading steam to the water admission valve leads into the casing 103 at.

the base of the conduit 106. A bleed pipe 130 leads from the casing of the duplex valve E to the ash pan, to withdraw any steam leakage or condensate which leaks past the pistons 111, 117 or valve stems 109, 116.

T he automatic calce F.

Referring now to Figs. 2 to 6 inclusive, P1

the casing 131 of the automatic valve Fis secured to the casing part 64 of the main control valve D, by meais of the bolts 132 which pass through suitable apertures in the flange 133 of the casing 131. When the casin 131 as shown in Fig. 6, it will be noted that the conduits or

passages

97 and 98, provided in the automatic valve casing, are inalignment with the

passages

94 and 95 respectively, in the main control valve D. For convenience in assembling the automatic valve to the main control valve and to insure the roper alignment of the

passages

97, 98, with the

passages

94, 95, the face of the casing part 64 of the control valve against which the auto matic valve is bolted, is lprovided with a circular recess 134 in which is seated a circular projection 135 provided on the automatic valve casing 131.

The passage 97 extends horizontally and leads into a widened chamber 136, the. upper portion of which is screw threaded to receive in the position stem 140, preferably formed integral with p vsaid valve extends downwardly into the member 137, which member is formed with a plurality of ribs 141, to provide a guide for said valve stem.

A hole 142 is drilled into the casing 131 to connect the passage 98 with its branch 143 which communicates with the pipe 115 leading to the duplex valve and which supplies the live steam 'for the operation of the valve 101 which controls the opening of the conduit 121 and pipe 40 for the auxiliary steam. The hole 142 is counterbored to provide a valve chamber 146 in which the ball check valve 147 is seated to revent the steam-.from the passage 97 and c amber 136 passing backwardly through'the passage 98.

A` cylinder casing 150 is screwed into the upper wall of the casing 131, the lower end ot' said casing 150 having a-wall 151 provided with a bearing 152, in which the piston rod 153, preferabl formed integral with the piston 154, is slidsably mounted. ,The wall 151 is also provided with a downwardly project-ing annular rib 155 which forms a valve seat for the upper face of the I,valve 139, and an aperture 156 leads from the bottom of the recess formed by said annular rib through the wall 151 to the interior of the cylinder casing 150. A pipe 157 is screwed into the side wall of the cylinder casing 150 and connects with the pipe 100 which leads from the main control valve to the ash pan. A cylinder head 158 is screwed int the upper end of the cylinder casing 150 and is provided with a screw threaded aperture 159 1n which the pipe 160 is secured. The pipe 160 leads to the main steam pipe or the steam chest of the locomotive and supplies live steam to the 'ston 154. The piston 154 is not connected with the valve 139 but merely contacts with said valve to normally hold said valve against its seat 138.

0 pera-tion.

,l Live steam from the turret of the locomo- 7 5 in engagement with the shoulder 68 ,of the sector shaped flange 67, the valve 79 will be shown in Fig. 12. In this position of the valve, it will be noted that the sector 83a of the recess.83 will be in alignment with the

ports

87 and 90 inclusive, so as to connect said ports and theircommunicating passages and conduits with the atmosphere through the bore 99 and pipe 100 which leads to' the ash pan. The

through port 81 of the valve 79 is in registry with the .port 86, thus permitting the live steam from the chamber 80 of the main control valve to pass through the ports 8l and 86, to the passage 91, and thence through the pipe to the injector, passing through the steam passage49 to the cylinder 46. The pressure of the live steam in cylinder 46 will force the piston 47 'outwardly and by the engagement of the piston rod 48 with the bolt 35, cause the exhaust` steam valve 33 to `be he'ld firmly against its seat 37, thus preventf.

ing the entrance of exhaust steam to the injector. p

In starting the injector, the handle 73 is movedto the position indicated bythe dotted lines in Fig. 6, which corresponds to the water on position, the osition of valve 79 for this position of t e handle being shown in said figure. It will be noted that the port 81 is still in registry with the portv 86 for holding the exhaust valve 33 closed, but that port 87 is now opened. The steam from the chamber 80, therefore, will pass through il'ssage 92 to the pipe 61 which leads to tlie water admission valve C of the injector, entering through the aperture of the cylinder head 59, and forcing piston 57 and consequently valve 54 to the left (Fig. 17) against the action of the sprin 62. This movement of the valve 54 obvious y opens it and permits the water from the Water tank to flow into the injector.

The handle-73 of the main control valve is maintained momentarily in the water on position, until the engine-manrnotes an escape of water from the overflow pipe 45a. This overflow is comparatively slight as the water is only under the Vpressure pf the head of water in the water tank and this pressureis not sutlicient to open the Hap 27 of the injector combining nozzle 27. As the Water which fills vthe injector when the handle 73 is in the water on position is moving with a very low velocity, 1t is advisable in starting the injector to ygive it an initial or primof port 88 allowsthe steam to ing operation with live steam to overcome the inertia of the volume of water which has now lilled the injector casing, For this `purpose the handle 73 and valve 79 are moved to the priming position shown in Fig. 9, in which position the pawl 75 is engaged with the notch 71, the-port 81 hasv moved to uncover the port 88;

ports

86 and 87 still being maintained open, thereby holding the exhaust steamvalve 33 closed and t-he water valve 54 open. The openin pass throng the passa e 93 to the pipe 96, being delivered there to the cylinder 118 of the duplex valve The live steam under pressure entering the cylinder 118 causes the piston 117 to be moved to the left, (Fig. 14), thus moving valve 102 off its seat 108 Vand allowing the liveV steam from the pipe 105 and conduit 106 to enter the conduit 122 and as indicated by the line Y-Y to control valve' pass to the pipe 39, by which it is delivi through the supplementary live steam nozzle 30 raises the pressure within the injector and causes the ap 27 to open, thus permittinga stron jet of steam and water to be discharged rom the overflow pipe 45'L and setting the column of water in the injector casing inv motion with a comparatively liigh velocity. As soon as this strong jet issues from the overflow pipe, the engine-man swin the handle 73 of the main to the next or running position.

` In this position of the parts, the paWl 75 is engaged with the notch 72 and the positions of the portsof the valve 79 with respect to the4 orts of the valve casing are as shown in ig. 10 of the drawing. The port 81 of the valve 79Y has now moved from the port 86 and the sector 83b of the recess 83 of said valve has moved into registry with the port 86, thus permitting the steam Within the passage 91, pipe 50, steam passage 49, and cylinder 46 to escape through the recess 83 of the valve to the pipe 100 and to the ash pan. It will thus be seen that the pressure of the piston rod 48 against the bolt 35 will be relieved, thus permitting the exhaust steam to raise the valve 33 and flow into the injector. With the valve 79. in the position shown in Fig.

10the ports

87, 88, and 89 of the control valve casing are uncovered by the port 81; ports 87 and 88' controlling the water admission and supplementary

live steam valves

54 and 102 respectively. The opening of port 89 to the live steam in the chamber 80, permits a portion of thel steam therein to iiow through passage 94 tothe passage 97 of the automatic valve F. The steam flowing through the passage 97 enters the widened lportion 136, and flowing throu h the member 137, raises the valve 139 o the valve seat 138, or fails to raise said valve off its seat, accordin to the pressure conditions within the pipe 160 and above the piston 154 Withinfthe cylinder casing 150. It will be remembered that the pipe160 is connected to the main steam pipe or to the steam chest of the engine, consequently if the throttle is closed no steam will e entering the main steam pipe or the steam chest and therefore there will be no ressure within the pipe 160. lf no steam 1s supplied to the engine, it is obvious that no exhaust steam will be available for operating the injector, consequently it is necessary to supply live steam through the auxiliary live steam supply pipe 40, Assuming then, that the throttle of the locomotive is closed and the main control valve is set in the running position; live valve 139 0H its seat and will pass to the pipe 115 by which it is led to the cylinder 112 of the duplex valve E. The pressure of the live steam in cylinder 112 will move plston 111 and valve 101 to the left, and hold the valve raised from its seat and in contact with its respective stop rod 123, thereby permitting the live steam from the pipe 105 and conduit 106 to flow into the conduit 121 Ifrom which. ,it passes to the auxiliary live steam pipe 4WL as indicated by th'eline X--X in Figs.v 14, 15 and 16. The pipe 40a conducts the live steam to'thesteam passage 40 of the injector from which it enters into the exhaust steam chamber 31, through the auxiliary steam opening of the injector. This live steam entering the exhaust steam chamber then flows into and through the main exhaust steam nozzle 25 and causes the jet to be established.

When the valve 139 is raised oil' its lower seat 138 into contact with the seat. formed by the lower face of the annular rib 155, the communication of the aperture 156, in the wall 151 of the automatic valve, with the passage 143 will be shut oit, but when the' valve 139 is in its lower position, the aperture 156 is o en to the passage 143 for a purpose whic will hereinafter appear.

Let it now be assumed that the throttle of the engine is opened; therefore pipe 160 will now contain steam under pressure, and

- as the area of the piston 154 is considerably larger than the area of the valve 139, as clearly shown in the drawing, the l,pressure of the steam in pipe 160 and in the cylinder casing 150 above the piston 154 will cause the valve 139 to be moved downwardly into contact with the seat 138, thus shutting olf the supply of liv'esteam from the

passages

97 and 136 to the pipe 115. within pipe 115 and cylinder 112 is permitted to escape to the atmosphere through the aperture 156 and pipe 157 which connects with the pipe 100 leading to theY ash pan. This escape of the steam from the cylinder 112 will permit valve 101 to be closed by the pressure of the steam in the conduit 106 thus shutting olf the supply of auxiliary live steam to the injector.

Under certain conditions, as for example when the locomotive is drifting, or when it is starting from rest with a heavy train, it is desirable to operate the injector as a live steam injectm` even though a supply of exhaust steam is available, and this is provided for by the emergency position of the handle 73 and valve 79 shown in Fig. 11. In this position, the pawl 75 is engaged with shoulder 69, the port 81 has uncovered the ports 87 88, 89 and 90, while Ivthe port 82 of the valve 79 has uncovered 'lhe steam the port 86, all of the ports of the valve casing thus'being opened to the steam in the valve chamber 80. The opening of the port 86, it will be remembered, causes Athe exhaust steam valve 33 of the `injector to be closed, the opening of the port 87 holds the water admission valve 54 open, the opening of the port 88 holds the supplementary7 live steam valve 102 open and the opening of the port 89 allows the steam to enter the passage 97 of the automatic valve. The port 90 ofV the control valve being opened,

however, allows the steam to flow throu h sure of the steam in the pipe 160 and cylinder casing 150. The supply of steam through the pipe 115 holding valve 101 open will permit the auxiliary live steam to enter chamber 31 of the injector as heretofore described. As the aperture 156 is quite small, the amount of steam which will escape therethrough is practically negligible and does not have any appreciable effect upon the pressure within the passage 143 and the cylinder 112.

When the handle 73 and valve 79 are returned to the oiPposit-ion, the steam in \tl1e passages controlled by the ports 87 to inclusive is allowed to escape to the atmosphere through the recess 83 and pipe 100 which leads to the ash pan, thus permitting the water admission valve 54 to close under the infiuence of the spring 62; the supplesteam valve 102, andfauxiliary steam valve 101, to be closed by the pressure of the steam in the conduit 106; and the ball valve 147 to return to its seat.

. The stop rods 123l which govern the eX- tent of the opening of the

valves

101 and 102 may be adjusted whenever necessary by the handles 129 which are conveniently accessible in the cab, although in practice it is found that it is not ordinarily necessary to change the adjustment thereof after they have once been set.

While the various valves of our control system have been described as operated by steam, it will be understood that the principles herein described are not limited to steam operation but that air, water or other fluid, or electricity may be used to actuate the various valves.

It will also be understood that while our invention is illustrated, for the purposes of this application, as applied to the Metcalfe type-of injector, the principles herein disclosed applicable to various types of injectors, and also that the constructional details of the various valve members and the llO location thereof in the system may obvious- I United States is:

trol valve to 6. In an exhaust steam injector',

1. The combination with an exhaust steam injector having a plurality of valve/controlled supply lines, of a single main congovern the actuation of the valves of said supply lines, said main con-4 trol valve located at a `point removed from said injector, means for actuating the valves in said' suppl'y lines, and connections from said mam control valve to said means.

2. The combination with an exhaust steam'- injector having a plurality of valve controlled supply lines, of fluid pressure operated means to actuate the valves in saidi supply lines, a main control valve to govern the actuation of said fluid pressure means, and connections between said fluid pressure operated means and main control valve.

3. The combination with an exhaust steam injector'having a plurality of valve controlled supply lines, of fluid pressure operatednmeans to act-nate the valves in said supply lines, a main control valve located at a point remote from said injector, `and connections between said main control valve and said injector.

4. dn an exhaust steam injector having a .plurality of supply lines, a valve to control each of said supply lines, fluid pressure operated means to actuate each of said valves, a main control valve located at a point remote. 4from said injector, connections from said main controlvalve to said fluid Ypressure operating means, av single manually operable handle and means actuated thereby to control the admission of fluid under pressure to all of said connections.

5. In an exhaust steam injector having a plurality of inlets, supply lines connected with said inlets, a valve in each of said supply lines, fluid pressure operated means to actuate said valves, a main control valve comprising a casing having a pluralit of ports therein, a single valve to contro the opening` of said ports mounted within said casing and connections from said ports to said fluid pressure means to permit the valves in said supply lines to vbe controlled by the actuation of said single valve.

a plurality of valve controlled supply conduits, means to actuate the valves ineach of said supply lines and a single unitary control to govern the actuation of said means.

an exhaust steam injector having a plurality of supply conduits connected therewith, a valve for each of said conduits, fluid pressure actuating means for the valves of said conduits, amain control valve 435 casing, having a plurality of ports,a main control valve Within said casing, means to supply fluid under pressure to 'said casing, connections from said ports to said fluid pressure actuating means, and said main cn trol valve having a' plurality of-ports constructed and arranged to admit the fluid under pressure to said connections and fluid pressureV actuating means when said valve 1s`1n a certain predetermined position.

8. In an exhaust steam injector vhaving a pluralityl of supply conduits connected therewith, a valve for each of said conL duits, `fluid pressure actuating means for thevalves of said conduits,- a, maincontrol valve casing, lhaving a plurality of ports, a main control valve within said casing, means to supply fluid under pressure to said casing, connections from said portsto said fluid pressure actuating means, said main control valve being provided with a plurality of pressure and exhaust ports, said pressure ports being adapted when aligned with the ports of said casingto permit a supply of fluid through the ports of said casing to said connections, and said exhaust ports when aligned with said casing ports permitting .the escapev of said fluid from ,sald tions and fluid pressure actuating means.`

9. Inan exhaust steam injector having a plurality of supply condmts connected therewith, a valve for each of said conduits, fluid pressure actuating means `for ythe valves of said conduits, a main control valve casing, having a `lurality of spaced porta-aunan control va `ve within said casing, means to supply fluid under pressure tojsaid casing, connections 'from said ports to said fluid pressure actuating means, said main control valve beingl provided with a plurality of pressure prts spaced equally to the rts of said valve casing and adapted to be rought in alignment therewith and permit the fluid under pressure within said easing to flowto said connections and fluid pressure actuating means, and said main control valve having a plurality of spaced exhaust ports adapted when brought into alignment with the ports of said valve casing to permit the pressure of the fluid within said connections and actuating means tof be relieved. v

' 10. In an exhaust steam injector having ,al plurality kof suply conduits connected therewith, a valve fiar each of said supply conduits, fluid pressure actuating means for the valves of said conduits, `aniaih ,control .'valve casing having a pluralityy of spaced ports, connecticutcommunicating with and cad-lng from sau. ports to said fluid ressure actuating in ans,

fluid under` pressure to said valve casing,-

under pressure to flowmeans tol supp y a conne'can exhaust pipe connected to said valve casing, a main control valve movably mounted within said valve casing, said main control valve being provided with a plurality of spaced pressure ports and a plurality of spaced exhaustports, said constructed and arranged to permit the iluid rom said valve casing, when any one of said pressure ports' is brought into alignment with a port of said valve casing, to flow to the respective connection and Huid pressure actuating means for said valve casing'port; and said exhaust ports being constructed and arranged to connect the remainder of said valve casing ports with said-exhaust pipe and vent the connections to said ports to" the atmosphere.

11. In an exhaust steam injector having a l.plurality of supply conduits connected therewith, a valve for each of said conduits, Yfluid pressure actuating` means for the valves of said conduits, a main'control valve casing having a plurality of ports,

means to supply a fluid under pressure.

to said valve casing, a main control valve movably mounted within said casing, con-V nections from the ports of said casing to said iiuid pressure means, and said main control 4valve provided with a plurality of ports constructed and arranged to brought into alignment with different ports of said valve casing when said valve is moved to different adjusted positions.

12. In an exhaust steam injector, a conduit connected therewith and leading to the supply of exhaust steam from an engine, a valve for closing said conduit, and a pressure responsive element for closing` said valve against the pressure of the exhaust steam within said conduit.

13. In an exhaust steam injector, a conduit connected therewith and leadingto a supply o f exhaust steam Ffrom an engine, a valve for closing said conduit, a pressure responsive element for closing said valve against the pressure of the-exhaust steam within said conduit and a control de vice located at a point remote from' said injector for controlling the operation of said pres-k sure element.

11i. In an exhaust steam injector, a conduit connected therewith and leading to a supply of exhaust steam from an engine, a valve for closing said conduit, and fluid pressure means for closing said valve against the pressure of the exhaust steam within said conduit.

` 15. In an exhaust steamjinjector, a conduit connected therewith and leading \to a su ply of; exhaust steam from an engine, a va ve for closing said conduit and fluid ressure means located within said injector or closing said valve against `the pressure of the exhaust steam withm said conduit.

pressure portsy be a valve supply of exhaust steam from an engine,

a valve for closing said conduit, a cylinder and piston for closing said valve against the pressure of the exhaust steam within said conduit and means for supplying fluid under4 ressure to said cylinder and piston, includmg control means located at a point remote from'said injector to govern the supply` of fluid to said cylinder and piston. 18. In an exhaust steam injector, a conduit connected therewith and leading to a supply of exhaust steam from an engine, a valve for closing said conduit, and means located within, said injector to close said valve against the pressure of the exhaust steam within said conduit.A

19. In an exhaust steam injector, a con.- duitconnected therewith and leading to a supply of rexhaust steam from an engine, for closing said conduit, a cylinder and piston within said injector, a piston rod connected with said piston and cooperatively associated with said valve, and means to supply a fluid under pressure to said cylinder and piston to' close said valve against the pressure of the exhaust steam within said conduit, saidv means including a controlling device located at a point remote from said injector to govern the supply of fluid to said cylinder and piston.

20. An exhaust steam injector having an exhaust steam chamber, a conduit furnishing communication between said exhaust steam chamber and the exhaust steam line of an engine, a valve for closing said conduit, a web projecting into the interior of said exhaust steam chamber, 'said web being provided with a. cylinder and a passage communicating with said cylinder, a piston slidablv mounted within said cylinder, a piston rod connected with saidpiston adapte to `engage said valve, and means to supply Huid under pressure to saidcylinder and piston to cause said valve to be closed against the pressure of the exhaust steam within said conduit.

. 21. An exhaust steam injector, having. a conduit connectedtherewith and leading to a supply of exhaust steam from an engine, a valve for closing said conduit, movabl mounted adjacent to the connection of conduit to said injector and movable to hanst. steam within said conduit, and iuid pressure operated means adjacent to said valve to c ose said valve against the pressure of said exhaust steam. f

22. In an exhaust steam injector, a conduit secured thereto and leadingto a supply of water, a valve for closing said conduit, means to normally hold said valve in closed position, and pressure means cooperatively associated with said valve to move it to opened position.

23. Inl an exhaust steam injector, a conduit secured thereto and leading to a sup-` 'ply of water, a valve for closingsaid conduit, means to normall hold said valve in closed position, and fluid pressure operated means cooperatively associated with said valve to move it to opened ition.

24. In an exhaust steam injector, a con= duit secured thereto and leading to a supply of water, a valve for closing said con uit, means to normally hold said lvalve in closed position, and fluid pressure operated means' cooperatively associated with said valve to move it to opened position, and a control valve located at a point remote `from said injector to govern the supply of fluid under pressure `to said fluid pressure operated means.

25. In an exhaust steam injector, a conduit secured thereto and leading to a supply of water, a valve for closing said conduit, means to normally hold said valve in closed position, a cylinder and piston adjacent\to said valve and cooperativel1 assoy fluid ciated therewith, and means to SuP under pressure to said cylinder and piston.

26. In an exhaust steam injector, a-conduit secured thereto and leading to a supply of water, a valve for closing said conduit, means to normally hold said valve in closed position, a cylinder and piston adjacent said valve and cooperatively associated therewith,and means to supply iluid'under pressure to said cylinder and piston, including means to control the admissionl of said fluid to said cylinder and piston.

27. In an exhaust steam injector, a coni duit secured thereto and leading to a supply of water, a valve for closing saidconduit, means to normall `hold said valve yin closed position, a cylin er and piston adjacent to said valve and cooperatively associated therewith, and means to supply a fluid under pressure to said cylinder and piston including a control valve located at a point remote from said injector.

28. In an exhaust steam injectora conduit'secured thereto and leading to a supply of water, a valve for closing said con uit, means to normally hold said valve in closed position, fluid pressure operated means cooperatively associated with said valve to move it to opened position, and means to supply heat to said water supply conduit and said valve and associated parts.

29. In an exhaust steam injector having and auxiliary live steam to said injector, Valves located inthe supplementary live steam and the auxiliary live steam conduits,

and fluid pressure operated means to actuate said valves.

` 30. 4In an exhaust .steam injector having conduits connected therewithl for supplying exhaust steam, supplementary live steam and auxiliary live steam to said injector, valves located in the supplementary live steam and the auxilia live steam conduits, said valves construe and arranged to be closed by the pressure of the steam ilowing to said live steam conduits, and ilui'd pressure means to open said valves against'ithe pressure of said steam. 4

31. In an exhaust steam injector' having conduits connected therewith for supplying exhaust steam, supplementary live steam and auxiliar live steam to said injector, valves located 1n the supplementarylive steam and the auxiliary live steam conduits, said valves constructed and arranged to beclosed by the pressure of the steam flowing to said live steam conduits, fluid pressure means to open ysaid valves, against the pressure of said steam, andadjustable stop means to control the extent ofopening of said valves.

32. In an exhaust steam injector having a conduit connected-therewith for su plying exhaust steam from. an engine to sai injector; a valve casin having a main live steam conduit therein a apted to be connected to a source o f livesteam, and a pair of branch conduits-in communication with ysaid main live steam conduit; said branch conduits being connected with said injector to supply supplementary and auxiliary live steam thereto, a valve for controlling the communication between said main conduit and each of said branch conduits and iuid pressure `operatedfmeans toactu'atev each of said valves. v

33. In an exhaust steam in'ecto'r having conduits connected therewith or supplying exhaust steam, supplementary live steam and auxiliary live steam to said injector,

valves located in the supplementary livel steam and the auxiliary live steam conduits fluid pressure operated means to actuate said valves and control means located at a point remote from said fluid pressure means to govern the actuation thereof.

\ 34. In an exhaust steaminjector having a plurality of conduits connected therewith for supplying exhaust steam, supplementary live steamand auxiliary live steam to said injector, 4a valve casing having a main live steam conduit therein adapted to be connected to a source of live steam and a pair of branch conduits in communication with said main live steam conduit for. conducting control valve located at a the live steam to said supplementary and auxiliary live steam conduits, a. pair of valves one for each of said branch conduits adapted to be moved to closed position by the pressure of the steam within said main live steam conduit, a c linder for each of said valves formed within said valve caslng, a piston within each of said cylinders cooperatively associated with its respect1ve valve, means to supply a fluid under pressure to said cylinder and pistons to cause said valves to be moved to opened positions against the pressure of the steam within said main live steam conduit.

35. In an exhaust steam injector having a plurality ofconduits connected therewith forsupplying exhaust steam, supplementary live steam and auxiliary live steam to said injector, a valve casing having a main live steam conduit therein adapted to be con'- nected to a source of live steam and a pair of branch conduits in communication with said main live steam conduit for conducting the live steam to said su plementary and auxiliary live steam con uits, a pair of valves one for each of said branch conduits adapted'to be moved to closed position by the pressure of the steam within said main live steam conduit, a cylinder for each of said valves formed'within said valvecasing, a piston within each of said cylinders cooperatively associated with its respective valve, means to supply a fluid under pressure to Said cylinders and pistons .to lcause said valves to be moved to opened positions against the pressure of thel steam within said main live steam conduit, including a point remote from said injector.

36. In an exhaust steam injector havinfr a plurality of conduits connected therewith for supplying exhaust steam, supplementary live steam and auxiliary live steam to said injector,l a valve casing having a main live steam conduit therein adapted to be connected to a source of live steam and a pail` of branch condults 1n communicationA with' saidl main live steam conduit for conducting the live steam to said supplementary and auxiliary live steam conduits, a. pair of valves' one for each of said branch conduits adapted to be moved to closed position by the pressure ofthe steam within said main live. steam conduit, acylinder foreach of said valves formed within said valve casing, a piston within each of said cylinders cooperatively associated with its respective valve, means to supply a fluid under pressure to said. cylinders' "and pistons to cause said valves to be moved to open positions against the pressure of the steam within said main live steam conduit,- including a control valve located at a point remote from'said injector and having separate ports and connections therefrom leading to said cylinders to perposition.

mit said pistons and valves to be selectively actuated.

` 37. The combination with an exhaust steam injector having conduits connected therewith for supplying exhaust steam from an engine, supplementary live steam and auxiliary live steam to said injector, of a valve for each of said conduits, fluid pressure operated Imeans for actuating said -valves, a main control valve and connections therefrom to said fluid pressure means, for controlling the admission of fluid to said fluid pressure means, and means interposed in the connection between said control valve and the fluid pressure means for said auxiliary live steam conduit for automatically preventing the flow of fluid to said last mentioned fluid pressure means when said engine is performing work.

38. The combination with an exhaust steam injector having connected .therewith a conduit leading to the exhaust steam line of an engine, and a. conduit for supplying auxiliary live steam to said injector, of a valve for controlling the flow of steam through said auxiliary live steam conduit` a fluid pressure actuated means for operating said valve, a main control valve and connectlons therefrom to sald fluid pressure means and means mterposed 1n the connec.

tion from said control valve to said fluid pressure actuated means for preventing yoperation of said fluid pressure means when said engine is performm work, said means comprising a valve mem r, a cylinderconnected with the live steam supply to said engine, and a piston in said cylmder cooperatively associated with said valve member.

39. The combination with an exhaust steam injector having connected therewith a conduit leading to the exhaust steam line of an engine, and a conduit for supplyingl auxiliary live steam to said injector, of a.

1valve for controlling the flow of steam through said auxiliary live steam conduit, 'A fluid (pressure actuated means' for operating sai valve, a main control valve and connections therefrom to said fluid pressure means and means interposed in the connecltion from said control valve to said fluid pressure actuated means for preventing operation of sai/d fluid pressure means when said engine visperforming work, said means comprislng a. valve member, a cylinder connected with the live steam supply to said engine, and a piston in said cylinder cooperatlvely associated`with said valve member, and means-governedby said main contrnl valve to by-pass .the fluid under pressure around said valve member when said main control valve is set in a predetermined 40. The combination with an exhaust( steam injector having connected therewith a conduit leading to the exhaust steam line of an engine,

and a conduit for supplying auxiliary live steam to said injector, of a valve for controlling the flow of steam A' means and means interposed in the` connectin from said control valve to said luid pressure actuated means for preventing operation of said fluid pressure means when said engine is performing work, said means comprising a valve member, a pressure responsive member connected with the live steam supply to said engine and cooperatively associated with said valve member, and a by-pass conduit to allow the fluid to flow Ato said fluid pressure actuated means" irrespective of the position of lsaid valve member, when said control valve is set in a predetermined position.

41. The combination with an .exhaust steam linjector having connected therewith a conduit leading to the exhaust steam line` of an engine, and a conduit for supplying auxiliary live steam to said injector, of a valve for controlling the llow of steam through said auxiliary live steam conduit, a fluid pressure actuated means for operating said valve, a main control valve and connections therefrom to said fluid pressure means and means interposed in the connec-v tion from said control valve to-said fluid pressure actuated means for preventing operation of said lluid pressure means when said engine is performing work, said means comprising a valve member,a cylinder connected with the live steam supply to said engine, and a piston in said cylinder cooperatively associated with said'valve member, a by-pass conduit operatively connected with said main control valve, and a one-way valve located within said by-pass conduit to prevent fluid passing from said control valve through 'said valve member from flowing through said by-pass conduit to said main control valve. e

42. In -an exhaust steaminjector having a conduit connected therewith .for supplying exhaust steam from an engine tosaid injector ya vsecdnd conduit connected with said in ector for supplying auxiliary live steam t ereto, a valve to control the flow of steam to said second conduit, and means to prevent automaticallythe opening ofA said valvewhen exhaust steam is being supplied to said exhaust steam conduit. i

543.' In an exhauststeam injector having a conduit connectedtherewith ,for supplying exhaust steamA i' an engine to said injector, a second conduitcon'nected with said in'ector for suppl auxiliary live steam thereto, a valve orsaid second' conduit, fluid pressure actuated. Ameans for ing exhaust steam from injector,

ector for supplyingrauxiliary live l l lnectin opening said valve and means t'o prevent automatically the operation of said fluid pressure means when exhaust steam is belng suplied to said injector.

44. an exhaust steam injector having a conduit connected therewith for supplying exhaust steam from an engine to s'aid injector, la second conduit` connected with s said y in'ector for supplying auxiliary live steam t duit, fluid pressure actuated means for opening said valve,

pressure means, and means interposed between said main control valve and fluid pressure means to prevent automatically the actuation of said fluid pressure means when exhaust steam is being supplied to said'injector.

45. In an exhaust steam injector. having a conduit connected therewith for'supplyan engine to said la second conduit connected with said in steam t ereto, a valve for said second conduit, fluid pressure actuated' means for openlng said valve, an automatic valve Ifor gov.

erning the supply of fluid under pressure to said lluid pressure means, a pressure `responsive ymember cooperatively associated with said automatic valve and means consaid pressure responsive member main live steam supply of said e e to cause said pressure responsive melilr .to prevent said automatic valve from opening when live steam 'under pressure is with t e f ilowin to said engine.

^ 46. n an exhaust steam injector having a conduit connected therewith for supplying exhaust steam from amengine .to said injector, a second conduit connected with said inlector for supplying auxiliary live steam t duit, lluid pressure actuated meansfor lopening said valve, a main control valve for controlling lthe supply of fluid tosaid fluid pressure means, a freely mounted valve interrosed between said main ycontrol valve an said fluidy pressure means, a pressure responsive member cooperatively associated with said freely'mounted valve, and connectionsbetween said pressurev responsive member and the main steam supply line to a main control valve for governing admission of lluid .to said fluid ereto, a valve for said second conereto, a valve'for said second conthe engine to prevent'said freely mounted y valve from opening when live steam under pressure is being supplied to said engine.

` 47.` InA an exhaust steam injector having a conduit connected therewith for supplying exhaust steam from' an engineuto said injector, a second vconduit connected with said injector for supplying auxiliary live steam thereto, a valve or said second conduit, lluid pressure actuated means for opening said valve, a main control valve, connections there-