US1270440A - Force-feed lubricator. - Google Patents

Description

J. C. ROSS.

FORCE FEED LUBRICATOR.

APPLICATION HLED MAR.2I. 19:7.

Patented June 25, 1918.

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W w m a'nuawtoz J 61 Ross.

J. C. ROSS.

FORCE FEED LUBRICATOR. APPLICATION FILED MAR. 27, 1917. 1,270,440, Patented June 25, 1918.

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ammoz J 6130s:

J. C. ROSS.

FORCE FEED LUBRIG'ATOR.

APPLICATION FILED MAR. 27, 1917.

Patented June 25, 1918.

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J. C. R055.

J. C. ROSS.

FORCE FEED LUBRICATOR. APPLICATION FILED MAR. 27. m2.

Patented June 2", 1918.

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J. C. ROSS.

FORCE FEED Luamcmoa.

APPLICATION min MAR. 21. 1917. L 1,270,440. Patented June 25, 1918.

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J. C. ROSS.

FORCE FEED LUBRICATOR.

APPLICATION FILED MAR. 27, WW.

1,270,440. Patented June 25, 1918.

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J. C. ROSS.

FORCE FEED LUBRICATOR.

APPLICATION HLED mini. um.

Patented June 25, 191-8.

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JOHN e. ROSS, or AKRON, onro.

FORCE-FEED LUBRICATOR.

Specification of Letters Patent.

Patented June 25, 1918.

Application filed March 27, 1917. Serial No. 157,727.

To all whom it may concern:

Be it known that 1, JOHN C. Ross, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvement-s in Force-Feed Luhricators, of which the following is a specification This invention relates to an improved force feed lub'ricator and has as its primary object to provide a device of this character which will be mechanically operated for pumping different kinds or grades of luhricants from diii'crem; supply tanks therefor and forcing tl'ie lubricants to theirrespective points of discharge.

The invention has as a further object to pro vide a novel arrangement wherein the luhricants upon being pumped from the supply tanks therefor will be heated so that the said lubricants will be maintained fluent and wherein the lubricants will be discharged through pipes carried along a steam line to maintain the lubricants heated until finally discharged.

A further object of the invention is to provide a device of this character having a nmnber of feeds for supplying each of the separate lubricants to'be delivered by the device so that the lubricator will thus be adapted to oil a corresponding number of parts and wherein the pumps employed in connection with all of the said feeds as well as the pumps for drawing the lubricants from the supply tanks. will all be mounted upon common reciprocating members to be simultaneously opera-ted thereby.

A further object of the invention is to provide a lubricator wherein the flow of the lubricant may be manually "adjusted and wherein any excess lubricant drawn up by the pumps will be automatically returned to the respective supply tanks therefor.

' And the invention has as a still further object to provide a lubricator of the above described character having an improved meclr anism for reciprocating the pump pistons of the device.

'Qth'er and incidental objects will appear as the description proceeds and in the drawings wherein I have illustrated the preferred embodiment of the invention and wherein similar reference characters "designate corresponding parts throughout the severel views:

Figure l is a fragmentary plan view of my improved luhricat'orparticularly showing the mounting of the pump pistons of the device,

Fig. 2 isa longitudinal sectional View particularly showing the .pawl and ratchet gear employed for rotating the cam shaft o'fthe lubric'ator,

Fig. 3 is a longitudinal sectional view taken on the line 3-3 of Fig. 1 and showin the arraiwement of the cam yokes employed and the mounting of the cam to cooperate with the said yo'hes for actuating the pump pistons of the lubricator,

Fig. 4 is a transverse sectional view taken on the line 4% of Fig. 1 and particularly showing the construction of the cams and iilustrating the manner in which the discharge pipc's from the lubricator are carried along a steam line for maintaining thelubricant within the said pipes heated,

Fig. 5 is a fragmentary sectional view showing one of the manifolds of the device,

Fig. '6 is a detail sectional view taken on the line G of Fig. l and illustrating the check valve employed in each of the supply pipes leading to the pumps respectively,

"Fig. 7 is a fragmentary plan view showing a modification of the invention wherein the pump pistons of the device are mounted directly within the lubricant tank,

Fig. 8 is a longitudinal sectional view of the modified construction particularly showing the pump employed and the overflow from the feed manifold,

Fig. 9 is a transierse sectional view taken on the line 9'9 of Fig. .8 particularly showing the construction of the cross head employed to carry the pump pistons,

Fig. 10 is a fragmentary sectional view illustrating the arrangement ofthe discharge pipes in connection with the modified form of the invention,

Fig. 10 is a fragmentary plan view of the pipes shown in Fig. 10.

Fig. 11 is a fragmentary plan view of a lOO still further modification of the invention, and

Fig. 12 is a fragmentary longitudinal sectional view of the form of the invention illustrated in Fig. 11.

In carrying out the invention, my improved lubricator is formed with a suitable base 10 upon which is mounted oppositely disposed complemental pump mechanisms indicated as a whole by the numerals 11 and 12 respectively. These mechanisms are identical in construction and one there-of only .will accordingly be described, the mechanism 11 being chosen.

. and arranged to extend substantially parallel thereto are a plurality of feed chambers 17 preferably six in number. Mounted to reciprocate within the chambers 17 are a plurality of feed pump pistons similar to the pistons 16 and three of which have been indicated at 18 while the other three have been indicated at 19. The pistons 15, 16, 18 and 19 are all mounted to slide through suitable packing glands 20 threaded into the body block 13 and at their outer extremities, are connected by a transversely extending cross head or bar 21, with the pistons loosely fitted through the said bar and screw threaded toreceive nuts adjustably connecting the pistons with the bar.

Formed through the ends of the body block 13 to communicate with the pump chambers 14 and 14 are suitable passages in which are threaded supply pipes 22 and 23 respectively each having a check valve 24 interposed therein, as shown in detail in Fig. 6, and also a cut-off valve 25. Connected with the supply pipes 22 and 23 are, as particularly shown in Figs. 4 and 5, upstanding overflow pipes 26 and 27 respectively. Intel-posed in the lower extremities of these overflow pipes are spring pressed check valves 28, arranged with the valves movable downwardly against the tension of thespringsthereof to open position. Mounted upon the upper ends of the overflow pipes, are elbows 29 and extending between by a nut or collar 32 closing the said manifolds at the adjacent ends thereof. Mounted upon the elbows 29 to communicate with the overflow pipes 26 and 27, are pressure domes 33 and 34 respectively.

Extending laterally and forwardly from I the manifold 30 are, as particularly shown ,thelouter ends of the lsaidfifeed pipes, are

elbows 37 having feed nozzles 38 extend ing downwardly therefrom. Screw threaded upon the lower extremities of the said nozzles are flanged collars 39 receiving the upper extremities of sight tubes 40, the lower ends of which are fitted within suitable packing glands 41 screw threaded into the top of the body block 13 withthe said sight tubes communicating with passages leading'into the feed chambers in the said block. The upper ends of the feed nozzles 38 are formed to provide valve seats and screw threaded upon: the elbows 37 are a plurality of manually adjustable valves arranged to co6perate with said seats, the

valves associated with the pipes 35 being indicated at 42 while the valves associated with the pipes 36 are indicated at 43. 7

Screw threaded into the outer ends of the feed chambers 17 in the block 13 are a pluand 48 respectively associated with the pumps 1.5 and 16. The feed pipes 47 and 48 are connected to the manifolds 30 and 31, adjacent the outer ends thereof, and mount ed within the said pipes are check valves 49 adapted to prevent a back-flow within the pipes. The discharge pipes 44 and 45are carried away from the body block 13 in any preferred direction and, at their outer extremities, are arranged to parallel a steam line or pipe 50 leading from asuitablesource of steam supply. Connecting the outer extremities of .the discharge pipes with the steam pipe 50, is a band 51. Any suitable number of these bands may be employed for holding the discharge pipes against the steam pipe 50 to be heated therefrom with the discharge pipes contacting with the pipe 50 throughout the greatest possible portion of their length up to the points of final dis charge of the said discharge pipes.

Leading from the steam pipe 50 is a reduced branch steam pipe 52 which, as particularly shown in Figs. 4- and 5, is carried through the manifolds 30 and 31 and is provided, at its discharge end, with a shut-off valve 53. Interposed in the said steam pipe between the main steam line and the manifold 30, is a second shut-off valve 54.

It is now to be observed that the cross bars 21 of the mechanisms 11 and 12 are arranged in substantially parallel relation with the supply pipes 22 from the said mechanisms extending toward each other. Connected with the supply pipes 22 at one side of the base 10, is a suitable lubricant tank or container 55 and connected with the supply pipes at the opposite side of the base is a similar tank or container 56.

Mounted between the cross heads is a cam gear for reciprocating the said cross heads and consequently reciprocating the several pistons connected thereto. This cam gear includes a driven shaft- 57 mounted to extend transversely of the base 10 substantially midway between the blocks 13 and rotatably supported by suitable brackets 58 and 59 up standing from the base. wise secured upon the shaft 57 are cams 60. These cams each include, as particularly shown in Fig. 4, a cylindrical body 61 at one end of which is formed a radial flange 62. The opposite end of the body 61 is screw threaded to detachably receive a cap 63 having a radial flange 6& formed there on to confront the flange 6Q. Rotatubl mounted between the said flanges are a plurality oftransversely extending anti-friction rollers 65 confronting the peripheral face of the body 61. Connected at their extremities to the cross bars 21 and arranged to coiiperate with the cam 60 are yokes 66 disposed for engagement by the rollers 65 of the said cams for shifting the yokes to reciprocate the said bars.

Connected to the outer terminal of the shaft 57, is a rock arm 67 and mounted upon the adjacent extremity of the said shaft inwardly of the rock arm, is a. ratchet 68 fixed to rotate with the shaft. Pivoted upon the upper end of the rock arm is a pawl 69 arranged to co6perate with the said ratchet. Consequently, actuation of the rock arm 67 will serve to rotate the shaft 57 by a step by step movement for reciprocating the cross bars 21. Freely mounted upon the shaft 57 inwardly of the ratchet 68, is a se ment 7 0 upon one extremity of which ispivoted a pawl 71 arranged to cotiperate with the ratchet 68 for holding the shaft 57 against retrograde movement. The opposite extremity of the segment is formed with an arcuate slot 7 2 and projecting from the bracket 59 through the said slot is a suitable post receiving a nut 73 adjustable to bind Keyed or otheragainst the said segment. Therefore, as will be observed, the segment 70 may be adjustably rotated about the shaft 57 to position. the pawl 71 in the path of the pawl 69. The pawl 69 will thus be caused to ride over the pawl 71 and the engagement between the pawl 69 and the ratchet 68 accordingly controlled for varying the stepped travel of the shaft 57. The arm 67 may be operatively connected with any suitable source of power for rocking the said arm.

In use, the tank 55 is preferably filled with one grade of lubricant while the tank 56 is' filled with another grade of lubricant. With the valves 25 opened, lubricant from the tank 55 will. upon the reciprocation of the cross arms 21, int-he manner previously described, be drawn out through the supply pipes 22 at one side of the base 10 by the circulating pump pistons 15 and into the pump chambers 14 whilethe lubricant within the tank 56 will be drawnout through the supply pipes 23 at the opposite side of the base by the circulating pump pistons 16 and into the pump chambers 14-. The piston 15 will then operate to force the lubricant in the chambers 14 up through the pipes =l7 and into the manifolds 30 while the pistons 16 will operate to force the lubricant in the pump chambers 14;? up through the pipes 18 into the manifolds 31. From the manifolds 30, the lubricant delivered by the pumps 14 will then be forced through the pipes 35 and through the nozzles 38 associated with the said pipes with the valves 42 operable for controlling the flow of the lubricant through the said nozzles and into the feed chambers 17 associated with the discharge pipes 44. The lubricant delivered by the pistons 16 will be forced from the manifolds 31 out through the pipes 36 and through the nozzles 38 associated with the said pipes with the valves 43 operable for controlling the flow of the lubricant through the said nozzles into thefeed chambers 17 associated with the pipes45. The feed of the lubricant from the nozzles 38 may thus be easily regulated and in this. connection, it will be observed that the sight tubes 40 provide an easy means for accurately determining the flow of thelubricant. Lubricant deposited in the chambers 17 associated with the discharge pipes 44 will, as will be clear, he forced out of the said chambers and through the said pipes by the feed pump pistons 18 while lubricant entering the chambers 17 associated with the pipes 15 will be forced out of the said chambers and through the said pipes by the feed pump pistons 19. The different lubricants within the tanks will thus be simulta neously drawn in and discharged without becoming mixed so that the device may thus be readily employed in any instance where it is desired to feed different grades or kinds along the main steam linev 5O5 thelubricant in 'being forced" through these "dischargeff." pipes Will be again heated before '7 being:

of lubricants simultaneously Furthermore,

it'is tofbe observed that three discharge pipes f adslfor. ea hi b c n la iprov ed"i115.

conl lection with eachpumpg mechanising When the device is thus L being operatedp thevalves 53 and 5d, withinjftlie. branch;

steam pipes 52, are opened so that steam. will" flow fthrough these pipes from the main steam pipe 50 and "be carried through the: manifolds 30 and3l. The" portions of the) pipes 52 within the said manifolds willthus be kept hot and willheat' the lubricant" as it islde'livered intothe manifoldsfso that the lubricant will be rendered perfectly jfiuent to v f,

tacle 74 is employed. Mounted to depend into one end of the receptacle is a'body blook 75, fandf fclosingifthe said? receptacleus a lid reciprocate? a piston TSislidable through a be discharged through'the nozzles 381 Since; the dischargejpipes 44 and 45 are carried;

finally dischargedy Ltherefore, provide'an arrangement wherein the lubricant "willbi initially heated'torender thelubricant fluent and will then be. reheated before being delivcred for use.

'. cip'rocate" pistons: ,85 slidable' through pack discharged into the manifoldsj3O and31:by'

the circulating pump pistons l5 'and 16"thanr:-, can flow" past the valves and throughthenozzles 38. Consequently, the" overflow pipes 26 and 27 are provid'edii Excess 1ubri=-.

cant ill the manifolds '30gwill be forced jbyi' the pistons 15 down through 'tl'ieoveiflow pipes 26 and through the waives 28"a ss'o' ciated with the said pipes to be returned"! into the supply, pipes22' h. a k1 whence the lubricant wasfirst'drawn. I111;

like manner, excesslubricant iir the mani-f, folds 31, will be forced by "the pistons; 16f

doivn through. the overflow pipes 27fand; through the checkvalves. 28,.associated'withij the saidpipes.) to be" returnedf'iritothe' supply pipes 23 'connectediwithfthe tanki 56 whence the lubricant was first" drawn.

Overflow lubricant in thevmanifolds some? tension of theuvsprings ofthe check'valves;

128 so that theseivalv'esrwill readily respond packing gland; 7 9 screwth'readed intoi'th'e" block. Goiinectedwith "the; batten of" the bl'oclfand" dependingpinto the receptacle 'is' valveis :a screen 832 Formed, 111' the block 5, at opposite sides of'the pump chamber 77 and arranged sub-' stantiallyf parallel" thereto are"- feed pump chambers 84 in which are mounted to. re-

ingglan'ds 86 similar to the glands'79." Con;

nected tothe-outer extremities of the pistons H r i78 and'85 is a transversely arranged 'cross' Attention is now directed'to' the fact thatf. owing to the presence of the valves42' and' 43, a greater. volume of lubricant maybe.

bar orfhead- Sf'l'fhaving' the said 'pisto'ns fitted'through suitable: notches therein, as particularly "shown inFig; 9, and adjust ablyj connected iwith the barby a plurality b-ar87is a yoke 88 having .a supporting jrod "89 extending laterally therefrom at; the side -of "the l yoke opposite" to the saidbar. The rod 88'is mounted to slide'withinf a suitable boss or sockt QO pro;

jecting inwardly, frolnthe adjacent end Wall of the receptacle 74' and closed at its" outer Depending from .the yoke is slidably received betweenv guides 93 upstanding from'the bottom wall of the receptacle, The rod .89 ancbextension 92 aretl'i'us adapted to rigidly support the yoke for re-" ciprocatory movement; 7

Screw threaded into the upper-extremity of the passagefil of the block '75'is a feed ranged va transversely extendinglmanifold' 95'. 'Leadlng from th1s,,-man1f0ld is an overpipe- 9 41 fat the upper end "of whichisarleading/through the block. Mounted Within i to the pressure of excess i lubricant in.;the

manifolds 30' and 31" and-fpermit "such ex cess lubricant to readily flow past thevajlves back into the respective supplypipesthere for. Furthermore, it is to be observed that;

the pressure in the domes 3.3 and 34ewi'llact to maintain a constant .:flow of lubricant to feed nozzles 38 even thoughthe lubricant pumps act intermittently In Figs; 7, 8, 9,'and 10 ofjthe drawings,

I have illustrated a modificationvof, the invention wherein an oblong llubrica'ntyrecep the lower end of thesaidpassage is a spring pressed, check valve 98 shiftable downwardly; to open position against the tension of the spring thereof. Connected with the extremities 20f the manifold '95 are elbows .99 in ,which are fitted. 'depending feed 1 nozzles 100i and "screw threaded upon the said nozzles ,are fiangedcollars'l0l in which are mounted sight tubes 102 fitted, {at their lower ends; within suitable passages 103 formed in the block: 75 to communicate with I the feed jchambe'rs;841i; Packing glands are l a said union.

preferably provided to receive the lower. ends of the sight tubes. The feed nozzles 100 are, at their upper ends, formed to provide valve seats and screw threaded upon the elbows 99 to cooperate with the said seats are manually operable valves 104 adjustable to control the feed of the lubricant to the chambers 81.

Formed in the block 75 to communicate with the feed chambers 84; are discharge passages 105 having check valves 106 arranged therein and screw threaded into the blocks to communicate with the said; passages, are lubricantdischarge aipes 107 and 108. respectively. The pipe 10 7 is. equipped with an. elbow 109 and mounted in this elbow is a check valve 110 adapted to revent a back flow within the pipe 107 w ile the valve 106 will prevent back flow within the passage 105 of the block 75. Connected with the elbow 109 is a T union 111 from which extends a pipe 112 fitted into a steam line or pipe 113. Threaded into the adjacent extremity of the elbow 109 and: extending: through the union 111 and pipe 112 is a pipe 111 discharging into the pipe 113.

Connected with the union 111 is a branch steam pipe 115 leading to a passage through the block 75 and communicating with a steam duct 116 e tending within the receptacle 74: down 01 e corner thereof beneath the. Said block and along one side of the receptacleat the junction of the said seat with the bottom wall of the receptacle. The duct 116 is preferably formed integral with the receptacle and leading from. the said duct is a discharge pipe 117. Interposed in the pipe 115 is a shut-01f valve 118;

The lubricant discharge pipe 108 is equipped with a check valve 108 and a T union 119 into one end of which is threaded a steam nozzle 120 while a discharge pipe 121 extends from the opposite end of the Threaded into. the nozzle 120 is a branch pipe 122' communicating with the branch steam pipe 115 below the valve 118. It isnow to be observed that the lubrition. Connected to the outer end-of the shaft 124 is a pawl and ratchet mechanism and rock'arm for rotating the shaft by a step by step movement, the said pawl and ratchet mechanism and the said rock arm being also neat-an with structure; ere-visual scribed in this regard. The reference. numerals upon these parts have accordingly. been duplicated.

It. will now be seen that reciprocation of the yoke 88 by the cam 125 will simultane ously reciprocate the pistons 78 andv 85. Re ciprocation of the circulating pump system 7 8 will actto draw the lubricant up through the supply pipe 80 into the circulating pump chamber 77. From. this chamber, the lubricant will then be. forced up through the passage 81 and past a check valve 126 arranged in the said passage to enter the pipe 9-1 and flow into the manifold 95. From the manifold, the. lubricant will. be forced in opposite directions through the nozzles 1-00 to be regulated in its. flow by the valves 1 04 and into. the passages 103. to enter the piston chambers 84. The feed pump pistons 85 will then act to. force the lubricant out through the discharge pipes 107 and 108. Lubricant flowing through the pipe. 107 will, as will be observed, be discharged flOIlI the. pipe 111 into the. steam pipe through the pipe 108 will be discharged into the steam pipe 121. This provides an arrangement wherein the device may be used in connection with an engine employing high and low pressure cylinders with the pipe 113 leading to the high. pressure cylinder and the pipe 121 leading to the low pressure cylinder and it is to be observed that the lubricant will be discharged directly into the said pipes to be delivered. to the cylinders. By opening. the valve 118, steam will be permitted to flow from the pipe 113 through the pipe 115 and through the duct 116 in the receptacle 7'1 to main tain the said duct hot. This duct will, therefore, act to keep the lubricant within the receptacle hot so that the said' lubricant will always be maintained fluent and since the pipes 107 and: 108 are arranged to parallel the steam pipe 115, each. for a portion of its length, the lubricant being discharged through the said lubricant pipes, wild: be again heated before being finally d eliw'ered into the steam pipes 113 and 121 In this connection, it is to be observed that when the valve 118 is open, steam will flow through the nozzle 120 to: cause a suction at the. adjacent end of the lubricant pipe 108. This suction will tend to draw the lubricant through the said pipe into. the union 119 and then force the lubricant through the pipe 121 with the valve 108. acting to. pr'e vent any water of condensation from flowing into the lubricant pipe. Excess lubri cant pumped intothe. manifold 95 the pump 7 8 may fiowbackthrough. thep1pe96 and: passage 97 into the receptacle.

In Figs. 11 and 12 of the drawings, I

have illustrated stilli tut-then modification 113, while the lubricant flowing pistons 131 corresponding to these parts as associated with the block 7 5 of the modification previously described. Connecting the pistons of each block is across head or bar 132. These bars are arranged substantially parallel and are joined by a yoke 133 simisaidblocks in a similar manner.

lar to the yoke 88 of the prior modification. J ournaled between the side walls of the receptacle is a shaft 134 similar to the shaft 124 and mounted upon the outer end of this shaft 134 is the rock arm and pawl and ratchet mechanism previously described in connection with the preferred form of the invention. Keyed upon the shaft to cooperate with the yoke 133 for reciprocating the cross arms132, is a cam 135 identical with the cams 60 previously described. Mounted upon the blocks 128 and 129 are the manifolds 136 and 137 respectively. These manifolds are equipped with the feed control valves 138 similar to the valves 104 of the prior modification with the manifolds communicating with the feed chambers of the Leading from the manifolds are overflow pipes 138, these pipes being similar to the pipes 96 of the prior modification. The circulating pump of the block 128 is provided with a supply pipe 139 similar to the supply pipe 80 While the circulating pump of the block 129 is provided with a supply pipe 140 which may be led to a suitable lubricant receptacle or tank independent of the receptacle 127; Leading through the block128 is a steam .pipe 141 which communicates with a duct 'l42 'within the receptacle, this duct being similar to the duct 116 previously described. Communicating with the feedpump cham bers of the block 128 are the lubricant discharge pipes 143 and communicating with the feed pump chambers of the block 129 are the lubricant discharge pipes 144. These. discharge pipes may be carried off to parallel a main steam line as illustrated in connection with the preferred form of the invention or maybe fitted to cooperate with steam pipes similar to the. pipes 113 and 121,

as illustrated in connection with the modification of invention previously described,the pipe 141, in either instance, of course, being connected with a steam supply pipe.

As will now. be observed, this present modification of the inventionprovides an arrangement wherein one lubricant may be fold connected with thefeed pump chambers intermediate the ends thereof and comm'unicating with the outer end of the circulating pump chamber, discharge pipes leading from the outer ends of the feed pump chambers, and a steam pipe extending axially throughthe manifold and terminating beyond the ends thereof.

2. A device of the character described including a body having a circulating pump chamber and a feed pump chamber formed therein, pistons mounted to reciprocate in said chambers means for-reciprocating the pistons, a supply tank communicating with the circulating pump chamber, a connection between the circulating pump chamber and the feed pump chamber, a discharge pipe leading from the feed pump chamber, an overflow pipe leading from the said connection and communicating with the tank, a pressure valve arranged in said overflow pipe, and a pressure dome at the upper. end of said pipe.

3. A device of the class described including a body having circulating pump chambers and feed pump chambers formed therein, pistons mounted to reciprocate in said chambers, a supply tank communicating with one of the circulating pump chambers, a second supply tank communicating with the other circulating pump chamber, a manifold connecting the first mentioned circulat- 1 mg pump chamber with some of the feed pump chambers, a second manifold connecting the second circulating pump chamber with the remainingfe'ed pump chambers,

. fold connecting the first mentioned'circulab means common to both manifolds for closing the inner ends thereof, discharge pipes-lead-' ing from the respective feed pump chambers, and means for reciprocating the pistons for said chambers, means for reciprocating the pistons, a supply tank communicating with the circulating pump chamber, a connection between the feed pump chamber and the circulating pump chamber, a main steam pipe, a branch steam pipe leading from the main steam pipe and extending axially through the connection between the pump chambers and tern'iinating beyond the ends thereof, and a discharge pipe leading from the feed pump chamber and carried to and along the main steam pipe.

In testimony whereof I afiix my signature.

JOHN G. ROSS. [L. s.]

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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