US1370953A - Maxwell - Google Patents

Description

P. G. DARLING.

LUBRICATING APPARATUS FOR STEAM ENGINES, c.

APPLICATION FILED IUNEZG. IQZO.

@mentali Mar. 8, H2L

5 SHEETS-SHEET I.

I I N P. G. DARLING.

LUBRICATING APPARATUS FOR STEAM ENGINES, ALC.

APPLICATION FILED JUNEZB. 1920.

Patented Mar. s, 1921.

5 SIIEETS-SHEET 2.

- a 0832; Pflf @ar ,any

M, /KM .A MM

P. G. DARUNG. ,LMUAUNG APPARATUS FOR STEAM ENGlNES, Lc.

APPLlCATlON FILED JUNE 26,1920.

Patented Mar. 8, i921.

5 SHEETS-SHEET 3.

Himsa m P. G. DARLING.

LusmcAnNG APPARATUS ma STEAM ENmNEs, Ac.

APPLICATION HLED IUNE 2611920. n 1,370,953 Patented Mar. 8,1921,

P. G. DARLING.

APPLICATION FILED JUNE 26. 1920.

Patented Mar. 8, 1921.

5 SHEETSMSHEET 5.

fnvena Finley; ai'g LumcATrNG APPARATUS FOR STEAM ENGINES, am.

PHILIP DABJLING', F ETL-QQELINE, JEASSACHUSETTS,

MAXWELL a atacan, massa.

Q35' NEW YRKNN. Y., A

ASSIGNOR T0 MANNING, GGRPORLTIQN OF NEW pensionnaire assesseurs ren arnesi-internas, ae.

specification of Letters Patent.

.Patented Maia 8, 1921.

Application le Ii'iine" 26, 1920.'.`ferial No. 39,l36t`5.

To all fwlwmz't my concern.'

Be it known that l, FHILIP G. Dimitris, a citizen of the United States ofAinerica and resident of Brookline, in the county or Norfolk and State of Massachusetts, hays invented new and useful Improvements in Lubricating Apparatus for. Steam-Engines, &c., of which the following is a specification.

This invention relates to force feed lubricators such as are employedv for injecting lubricating oil into the steam in the'feed pipe of steam engines and'wliile herein illustrated as adapted particularly Io r use in locomotive practicefi's in many ef its essential features of general application.

While devices of this character are known to the trade, they are in many cases defective 1in practical operation by reason of the dehcacy of the parts employed or their exposure vupon the outside of the casing whereby they are unfitted for the rough usage, constant and heavy vibration and unavoidable shocks necessarily attendant upon their use` for the purpose intended.

It is also found in practice that by reasoiif'v of the common occurrence in the oil ema' ployed, of sludge, grit or particles of Waste 4or other fibrous matter, the check valves frequently fail to act, requiring a long and laborious operation to dismantle the device forrthe purpose of clearing the valves.

It is necessary to the successful operation of devices lof this character that the pump reservoir shall always contain oil to a height above the-intake of the pump, as otherwise air is forced into the space above the check Y valve, and by reason of the short pump stroke and the heavy back pressure, this air can not be removed except by disconnecting the discharge pipe, and for this reason it is desirable that the pump intake be as low as practicable and that the pump be required to lift the oil through but a short distance 0n the suction stroke.

It is also desirable to provide simple .drive mechanism for the pump'fpiston or pistons which shall be positive in action during the Y pose are installed in pressure stroke and in which there shall be 4no undesirable lost motion between the parts.

Devices commonly employed for the urthe locomotive ca in accessible for inspection d to b d'1 or er e rea 1g t it would be advantaand adjustment,

geous to provide for the automatic regulatire device might be located outside the cab, thus saving space therein, While at the same time suoli automatic regulation would insure uniformity of oil feed, thus economizing oil. n devices of this character it is essential that the terminal check valve commonly installed in the discharge pipeishlll be of simple construction and easily cleaned as well as reliable in operation, many of the valves now employed failing to give satisfactor f results. "j

n the` production of a lubricating device .iorthe purpose above described vthe object in view has which the above noted defects ciesfin the prior ai't devices are overcome or avoided-and which Will embody all such desirable features as may conduce to the successful operation and `continued land unin-` v terrupted 'uselo such a device.

'y Qlo the above end and in accordance with this invention the lubricator may be so constructed as to have all its essential operative parts entirely inclosedin a Strong and rigid casing having provision for ready attachment to the locomotive frame.

The device may also lcomprise a self -contained pump element comprising thepump cylinder or cylinders with their pistons, the pump intake, clieck valve or valves and a portion of the -oil discharge passages all of which ma be arranged for ready removal as a unit rom the main casing for cleaning or repairs and Without necessitating the drawing ofi' of the oil from the casing.

For actuating the piston or pistons an intermittently rotating shaft may be em loyed having a cam rrequivalent means or actuating the piston on its pressure stroke and spring means for moving :the piston on its suction stroke. The intermittent movement of the shaftcan conveniently be obtained by the use-of .a actuated from some adjacent reciprocatin part suchas the main steam valve gear, an preferably such 4drive will include a loc ratchet to provide against an backward 11otation ,or lost motion in the s aft.

For simplifying the pump mechanism and for insuring its proper operation" and lfeeding of the oil thereto, the cylinder may be ratchet Ior equivalent drive iiov , tages above outlined,

ioeated at a point below near/al levei cil in the casing so that no suction valve is necessary, thus avoiding one common source lf trouble in pumps es ordinarily constructed, while at the Sametime the location of the operative parts below the normal level of the oil insures a constant and thor-- ongh lubrication of such parts.

.he terminal check ve in the discharge pipe may be of the ball type but tcinsure proper operation under all conditions this valve may be provided with a spring pressed stem, the inclosing casing for the valve to the accompanyi Figure l is a elevational view or locomotive, il the'device nii ti ion thereto;

Fig. 2 is a t' .nsverse vertical sectional View to enlarved scale, on the line armi),

nentary diagrammatic the iront portion ot the application oi Fig. 6; i

ig. 3 1s an end elevation from the righthand side of Fig. 2;

Fig. i` is a plan view of the device shown in Fig. 2 on the, line c-d thereof, parts being broken awa-y;

'y Fig. 5 is a crosssection on the line cof Fig. 2;

Fig. 6 is Fig. 2;

Fig. 7 is an 'elevation to enlarged scale,

a section? on the line g-a or docking from the right-hand side of 2,

of the roller ratchet device.

. Fifi. 8 is a view similar to Fie. 2" D L: looking from the yleft-hand side of the ratchet device as viewed in 2;

Fig. 9 is a cross-section through the roilerratchet device on the line m-n of Fig. '7; Fig. 10 is a fragmentar 1 side elevation of the drive shaft .showing the mounted thereon; and

; section to enlarged scale throu valve.

Referring to Fig. 1,-1 is the locomotive cylinder, 2'the valve chest, the piston rod, 4 the cross-head, 5 the valve rod, and 6 the steam feed pipe, all of usual and well-known construction. 7 indicates the lubricating de- .vice'forniing the subject matter of this in vention mounted in position for use upon the locomotive frame7 and 8 indicates generally a reciprocable connection receiving its movement from cross head, and by reference may had dawing's, in whichgarants lmee-ns of which the moving parts of the lubricating device are actuated.

elierring more particularly to Fig. 2,--10 is a casing of substantially rectangular form, open at its upper end and provided with a series of lugs 11 having openings 12 therein through which suitable bolts or other connections may be passed for attaching the casing to suitable supporting means on the locomotive frame. -As the arrangement of the 'casing and of the attaching lugs 11 is symmetrical, it is possible to mount the lubricating device upon either side of the locomotive with equal facility. At its bottom the casing is provided with a boss 13 having an opening therein normally closed by a plug 14, such opening serving as a con`- venient means for draining oil from the casing if occasion arises for so doing. 15 is a vertical rib projecting inwardly from the right-hand wall of the casing as viewed in Fig. 2 and having therein a chamber 1G in ich may be mounted a gage glass 17, there an opening at the end of the casing .Y i which the gage glass may be inspected. As seen in Fig. 6, the interior of t" e gage glass communicates by means of a 18 with the interior of the casing i0. whereby fiuid contained in said casing is permitted to rise within gage glass. As the gage glass is relatively short and its iower endis well above the bottom of the casing, accidental breakage of the glass does not occasion the loss 0i all the oil, a suflicient amount remaining in the lower part of the casing for any reasonable period of use.

The interior w ll of the easing opposite rib lf3 is provided with. a longitudinal vertical rib 20, this rib being cored out to provide a steam chamber 21, whereby the contents of the casing may be kept at "the proper temperature. For admitting to the chamber 2l and for draining the condensedsteam therefrom, openings 22, and 24 may be provided leading into said chamber from the exterior oi? the casing, such openings being tapped for pipe connections` It is to be understood that but one of the openings 23, 24 will bein use at one time, the other being closed by a suitable plug, theprovision of two openings, however, 'facilitating the attachment of the drainage pipe regardless of whether the .30 Ithere rom a strainer 37 of foraminous marvaees l upon the upper edge of the casing and to be supported thereby. The plate 26, at its right-hand edge `as seen in Fig. 2, has a flange 28 of less depth than the flange 27, and engaging beneath said flange 28 is a j cover member 29 which extends across the open top of the casing 10 and rests at 30 upon the upper edge thereof at the opposite side, a lug 31 extending downwardly and against the inner wall of the Casin 10 to pro erly position the member 29 re atively to t ecasmg. 31 is a screw passing downwardly through an openin in the cover member 29, and en aging aug 32 integral with the rib 15. e cover member 29 has an upwardly-extending boss 33 provided with an opening .givin access to the interior of the casing 10. wardly from the upper sur ace ofthe cover member 29, and pivotally secured to said lug by means of a pin 35a is a cap 36 which fits down over the boss 33 for closing the opening therein. The hole in the cover member through which pin 35a. passes is somewhat lar er than the diameterv of the pin whereby t e cover is permitted to seat .l Y ltself securely upon the outer surfacev of the boss 33. The opening in the boss 33 is of i relatively large extent as compared with the casin 10, and has projecting downwardly terial, this strainer extendin well down into the casin and forming a arge receptacle :into whic the lubricating me 3,5

lum may be poured- The plate 26 may be secured in position upon the casing by means of a screw 38 passing through an openn therein and engaging a threaded hole in t e up er .end

f 'of-:therib 20. Extending downward y from the plate26 is a pair of legs 39, 40, these legs and the parts associated therewith be- `ing of duplicate construction. In the following description, but one of the legs with the parts supgorted thereby will be specililcally describe Referring now more particularly to the vleg 39,l numeral 41 indicates a chamber extending longitudinally thereof, said-'chami 'ber belng closed at itsupper end by a. plug f42' phuving a passage 43-therein leadin to fa connection 44 to which a pipe," as 45 ig. 1,'may be attached., said pipe leading to the terminal check-*valve connection 46 (see 11). At its lower portion the lchamber 41`is provided with a pair of ball valves 47, 48respectively, said valves being mounted one abovethe other, and acting independently. 49 is a retainer having screw-threaded ngagement with the interior of the leg 39,

ssaid retainer serving to limit the vertical rise the ball 47. The lower end of the leg 39 is provided with a foot 50 which is arranged to be seated between the inner wall of the casing 10 and a lug 51 projecting vertically upward from its bottom wall, such closed by the aforesaid ball 48.

point in said pump cylinder 55 intermediateits ends leads a passage 58 Ywhich opensv lu 35 extends upfoot, together with the screw 38 Serving to i retain the pump element in proper operative position in the casing. I i

Projecting from the ri `hthand .side of the leg 39 near its lower en is a boss 52, said boss bein provided with radial flanges 53 and 54 adjacent its opposite extremities, .and having a central bore 55 whichl serves as a pump cylinder. A The bore 55 is extended at 56 to a point below the chamber 41, and communicates therewith by means of a passage 57, the upper endV of which is normally From a into the lower part of the casing 10, such passage serving as the pump intake. 59 1s a cy indrical screen or strainer of wire netting or other suitable material surrounding the boss 52 and having its ends seated upon the flanges 53, 54, respectively. This screen 59 thus mounted serves to inclose the entrance to passage 58 and to form thereabout an annular chamber.

Slidable within the pump 'cylinder is a piston 60 having the-piston-rod y'61 integral therewith, it bemg vnoted that the piston- 60 is of uniform diameter throughout that por- -tionwhich travels within the cylinder. By

while at the same time the slots permit the proper movement of the piston-rod withinl the guides.

The pistonrod at its right-.hand extremity is provided with an"'enlarged head 65 forming a shoulder 66 against which one end of a coil spring 67 may bear, said spring surrounding the piston-rod and the guides and engaging at its oppositeextremity the Vright-hand end of the boss 52.

68 is a yoke member having a central bore 69 and a downwardly extendmg fin 70. The fin 70 is arranged to slide longitudinally of the casing within a guideway 71A formed between upstanding lugs 721 73 secured to the bottom wall .of the casin ,fand at 74 the yoke is provided with a sto'p lug arranged to lcontact with the inner right-hand wall of the casing (see F ig. 2). The left-hand face oit' said yoke, as viewed in Fi `2, is ro. vided with a pair of bosses 7 Vsee 'also yig.l 4) against which the enlarged heads'oftbe ieo ' Carried by the shaft 76 at a point mid a stufling box comprising a capi 91 Way of its length is a helical cam 78 providing a gradual incline 79 which ends in an abrupt shoulder 80. This cam is located within a longitudinal chamber 81 in the yoke member, and the latter is provided at a point within said chamber with a projecting lug or pin 82 arranged for engagement by t cam 78.

The right-hand wall ot the casingil has formed therein a'large opening 83 within which is seated a casing 84 having a flange 85 bearing upon the outer face of the ca'sing 10, said casing 84 having four outstanding ears 86 adapted to engage ythe the bosses 25, upon the right-hand outer surface of the casing 10, and to be attached thereto by means of bolts 87 or other suitable securing means. The casing 84 also has an inturned flange 84a at its end adjacent casing 10, said flange being cut away at one point as 84b for a purpose to be described. Tlie other end of the casing 84 is provided with a reduced portion 88 providing a bearing opening 89 within which may turn a shaft 90, said shaft workin in a aving screw-thread engagement with the portion 88 of the casing. For holding the cap 91 in adjusted position, a nut lock may be provided, that herein shown consisting of a plate 91a slotted at 91b to take over one of the bolts 87 by means of which it may he fixed in position. The face end ol plate 91 is .notched out at 91c to engage an angle of the. cap 91 whereby the latter is held in desired position. The inner end of the shaft has secured thereto or integral therewith, a flange or collar 92 having a series of recesses 93 in its periphery (see Fig. 7), such recesses providing substantially flat surfaces 94, 95 arranged at an angle to each other and adapted for engagement by balls or rollers 96. At `one end the recesses are provided with pockets 97 within which are seated coil springs 98 against the ends of which the respective balls or rollers bear. v

Surrounding the outer periphery of the flange 92 is a retainervcup 99 having a sub stantially cylindrical inner surface engaging with the balls or rollers. The cup 99 1s provided with a hun 100 having a central bore within which is seated the right-hand end of the shaft 78 (see Fig. 9), the shaft rivets 103 or other suitable securing means z said collar being provided with a series o recesses 104 similar in all respects to the recesses 93 in the collar 92, such recesses being adapted to receive balls or rollersl 105 which engage the inner surface of the c asing 84; it being noted, however, that the arrangement of the recesses 104 is'the verse of that of the recesses 93. Referring more particularly to Fig. 7, it will be noted that the wall 94 of the recess 93 approaches the interior wall of the retainer 99, and that the spring 98 tends to force the ball or roller 96 toward the narrow endV of the recess. Upon rotation of the flange 92 in the direction of. the arrow in Fig. 7, the ball or roller 96 tends'towedge between the surface 94 and the interior survface of the retainer 99 whereby the latter is caused to rotate with the shaft 90. But upon reversal of the movement of shaft 90 the ball 96 moves away from the narrow end of the recess, thus releasing the retainer 99.

In inserting the rollers 9G in the casing 84, 'i

it is simply necessary to bring the recesses 98 successively opposite the opening 84", whereupon the rollers may be slipped into place, and upon relative rotation'of the parts 99 and 84 the flange84a is brought;

into retaining relation to the rollers, whereby the latter are held in operative' position. By reason of this arrangement it is possible to remove the entire casing 84 with its inclosed parts with little danger of losing any of them, the flange holding `the rollers in position and thereby preventing displacement of the other part.. x,

Referring now to Fig. 1, it will be seen that the connection 8 from the cross-head has pivotal connection with the crank arm 106, such crank arm being secured in any desired manner to the outwardly extending portion of the shaft 90. Al convenientv means for securing suchv crank arm tp the shaft may consist in forming the crank arm with a split end, as indicated at 107,\ 108, Fig. 2, and providing the shaft 90 with .a tangential slot with which may engage the side of a bolt 109 passing through the parts Y 107, 108, and by means of which said lparts may be clamped securely about the shaft.90.

he oil from the lubricating device islfed into the steam-feed pipe by means of a tube 110 inserted through the wall of said pipe and extending to a point vsubstantially central thereof, said tube bein'g inclined somewhat in the direction of steamv flow to assist in the deli/very of oil to the steam current.

s it s desirable that the drops of lubri cant in passing into the steam be as minute as possible, it 1s convenient to provide a terminal check-valve adjacent the delivery end. of the pipe, such valve being illustrated in Fig. 11, :in which the valve member is indicated as a ball 1111 adapted to seat against a surface 112 formed in a chamberin a casing 113, such valve serving normally to close the passage 114 vleading from the delivery t withthe proper lubricant delivery. In order to keep the valve properly seated under all conditions, it is provided with a stem 115 surrounding which is a coil spring 11G which may be placedunder proper initial tension by means of a nut 117 engaging a screw-thread upon the stern 115. The ter-- minal valve structure comprises a plurality of parts including casing 113 which may ne separated for proper adjustment of the valve, and with a clean-out opening 11S provided with a plug 119 through 'which theA gfvalve may be and freed from aey cumulated or dirt, necessary'. 35

the openin in the cover plate In the normal operation of thehdevice, being understood that it is mounted thev locomotive frame iu the manner indie thereceptacle 10 will he filled to desir-ed level with cih-by pouring the latt rrthrough vision of t e very large strainer the rapid lling of the casing, and the pivot-` Aits travel through the pump passage" ed cap 36 insures the exclusion oi dirt and binders from the interior of the receptacle, while the location of the steam cl aber 2l adjacent to and extending longitudinally between the legs 39 and 11G insures roper heating of the lubricant throng without the nece-ssi y for raising the ia body of fluid Within casing 1G to an i sii-ably high degree. y

The space at the bottom of the casing below the guides 62'forms a sludge ein ber and the provision of the annular ch ber within strainer 59 insures a free 'How o. oil to theinlet paage 58 even if sludge is permitted' to accumulate inthe bottom o the casing to a level above said inlet.

Upon operation of the locomotive, moven ment is imparted to the connection 8 at every reciprocation o the cross-head, and thus, in direct correspondence to the speed of the locomotive, the pump pistons are actuated, whereby oil is drawn through the y terminal check valve.

passage 58 through `the bottom of therereptacle and forced upwardly through the check-valves 47, 18 and into the chamber 41, from `which it iows throughV the passage in plug l2 and the connecting pipe 45 to the When the pressurn` becomes suicient, the terminal check valve.' will be opened, and oil will be injected,

drop by drop, into the steam inlet pipe.

As the connection 8 is reciprocated, the

crank arm 106 is rocked, and thereby through the ball ratchet, comprising the parts 92, 96 and 99, the shaft 76 is rocked, in a direction to cause thev cam 78 to move the yoke 68 to the left, as seen in Fig. 2. Such movement of the yoke, acting through the heads ofthe piston rods, serves to move the pistons to the left, thus forcin oil from the cylinders and into the cham. er 41, as vabove described,

Upon the reverse oscillation of the crank arrn 106, the driving roller ratchet is idle, but the ratchet. comprising the parts 102, 195 and becomes active to prevent any reverse movement of the shaft 76.

`When thev pin 82 reaches the position iin-f' dicated by the lefthand dotted circle'I Fig. 10) at the end of the cam incline 79, it ro'ps from abrupt shoulder 80 to the position indicated by the right hand dotted circle, and tl i apri immediately return the pist; the pistons, together; `with the ist position ready for a repeiation. Such, reverse movee action o the springs actuto e on their suctionfstrolte.

. pump elem-ent for cleaning .or reis merely necessary to take out and 35S-,whereupon the cover 29 i y' r be.-ren'ioverl, and then the pump element. com 'sing the plate 26, the legs 52, with, the pump cylin- 6B, thef'pistons andpis- 'the actuating spring 6T, may

ily' he i' of time or labor. served all the operativel parts of the mechanism are fully inclosed and below the level ofthe oil in the casing 10, the parts l thus beinir very thoroughly lubricated at all times. 'y reason oik the arrangement of the pump oylinderis at a point near the bot- .mr any reason, it is desired to re-I a unit from the' interior of' tom of the casing 10, it is unnecessary to provide the pump with an intake valve as the lubricant always Hows freely into the cylinder in which. a vacuum is formed upon each back stroke of the pump sufficient to insure this action.

lVhile as, herein disclosed, the ratchet-- device for operating the drive shaft has been shown as of a roller clutch variety, it is contemplated that ratchet device of other and well-known forms may be substituted therefor lwithout affecting in any substantial manner the operation of the lubricating device.

-It is furthermore to be understood that Whereas but one pipe 45 has been shown leading from the lubricator, a similar pipe will, in the usual operation of the device, be arrangedto lead to the other cylinder of the locomotive, although it is within the scope of the invention to prov-ide independent lubricating devices for the opposite sides of the locomotive. templated that under some circumstances, as for example in locomotives of the com* pound type, it may be desirable to provide a comparatively large number of such delivery pipes leading from the lubricator; and in such cases it may become necessary to provide a greater number of pump cylinders than that shown herein.

l It isalso contemplated that in some cases 1t may be found desirable to provide for automatically lubricating certain of the mechanical parts of the locomotive, or of other machinery; and in such cases, oil from a lubrica-tor pump of the type herein disclosed may be led to the points of use by means of suitably arranged conduits.

For adjusting the rate of flow of oil it is contemplated that levers 106 of various lengths will be provided, the length of the lever determining the throw of the ratchet device, under constant ,travel of lever 8. Such a mode of adjustment is foolproof and can be calculated for any given set of conditions with great nicety.

Having thus described the invention, together with the preferred embodiment of the same and the mode of use thereof, what I claim and desire to secure by Letters Patent of the United States is:

1. In combination in a lubricating device, a pump element comprising a pair of substantiallyparallel pump cylinders, lpistons arranged to reciprocate in said cylinders, a shaft interposed between said pistons, and mea-ns carried by said shaft for simultaneously moving said pistons in the same direction.

2. In combination in a device of the classl supported between @slid pistons, a cam upon It is furthermore con# said shaftand.- a cam follower actuable by said cam and. having connection to said pistons for simultaneous] imparting the pressure stroke to said piston. i

3. In a device 4for lubricating machinery,

' in combination a pump comprisingr a piston,

a rotatable shaft, a helical cam upon said shaft, said cam having a gradual rise and an abrupt descent, and :i spring pressed cam follower engageable with said cam, and having operative conneciion with said piston.

a. ln a lubricating device, a vpump comprising a plurality of parallel pistons, guides for said pistons, a yoke member constructed and arranged to contact with the ends of the respective pistons, means for moving said yoke member whereby to impart the pressure stroke to said' pistons, and spring means for holding said pistons in contact with said yoke member.

5. In a lubricatingr device of the class described, a casing, a pumpelement mounted in the casing, a pump cylinder therein and having its axis substantially parallel to the bottom Wall of the casing, a piston movable within said cylinder, and a shaft, having its axis substantially parallel to the axis of the piston, rotatably mounted in the casing, and means carried by said shaft for actuating the piston.`

6. A lubricating device for steam engines, comprising, in combination, a casing for the reception of lubricating oil, a pump element removably secured within said casing, said element being provided withla pump cylinder and with inlet and discharge passages therefor, said inlet being unpiovided with a valve, a check valve in the discharge passage,

a piston within the cylinder, an intermittently rotatable shaft within the casing, and` cam means upon said shaft for imparting the pressure stroke to the piston.

7. ln a pump device, a support, a boss projecting'therefrom. said boss having a bore thereii'i constituting a pump cylinder and having an intake passage leading thereto, a screen of foraminousmaterial surrounding said boss and means for Spacing said screen from said boss.

8. In combination in a lubricating device, a casing, a pump cylinder located therein and having its axis substantially parallel 'to' the bottom of the casing, a shaft within the casing and arranffjed substantially.parallel to the axis of the pun-ip cylinder, a piston within the cvlinder, a cani upon said shaft, a cam follower upon said piston, said cam being constructed and arranged to move the pistonin one direction only, and a spring for moy/ing the piston in vthe oppositedirection.

9. In combinaties in a lubricating device, a. pump element having therein a pair of parallel relatively stationary 'pump cylinders, pistons in the respective cy1inderS,"a

and a spring for moving said follower in the opposite direction. Y

10. In a device of the class described, in combination, a casing having therein a. pump element comprising pistons, a shaft rotatable within the casing and having its 'axis substantially parallel to the axes of said pistons, connections between said shaft and the pistons for actuating the latter, means for intermittently rotatin for locking the sha against backward rotation.

11. In a device of the class described, in combination, a support, a substantially cylindrical boss extending from said support and having a fluid intake passage opening throughfits lateral wall, radial flanges eX- tending from said boss at each end thereof, and a cylindrical screen surrounding said boss and having its ends seated upon the respective flan es.

12. In a evice of the class described a pum element comprising a supporting mem er, a pair of spaced tubular le de. pending therefrom, and lateral and su sta-ntially parallel bosses extending from the respective legs adjacent their free extremities, said bosses having parallel bores therein.

13. In a device of the class described a pump element comprising a pair of rigidly connected, substantially parallel legs, said legs having longitudinal passageways therein, bosses projecting from the respective legs and-having substantially parallel bores therein, and guide members extending from said bosses and having guiding surfaces substantially parallel to the axes of said bores.

14. A device ofthe class described, comrising in combination a tubular support, a

oss outstanding laterally from said support and provided with a substantially cylindrical bore forming a pum cylinder and a pair of s aced guide mem ers extendin outwardly rom said boss and provided wit guiding surfaces arranged substantially parallel with said bore.

15. A pump element for lubricatin vices comprising in combination'a tu ular member having a supporting flange adjacent its upper end, a foot extending downwardly from its lower end, and a boss projecting laterally from said member and provided with a substantially cylindrical bore constituting a pump cylinder. l

16. In a lubricating device, a pumpl comprising a plurality of cylinders, pistons in said cylinders, guides for the respective pistons, a piston actuating yoke cngageable with the outer ends of the several pistons, mechanical means for moving'said yoke, and

the shaft, and means dei therethrough the pistons, -in one direction,

and springs engaging each of said pistons for moving them in the o posite direction.

17. In a-lubricatingfcgvice', in combination, a pump comprising a plurality of substantiall parallel pistons, a yoke member engagea le with the outer ends of said pistons, a guide for said yoke member, a cam for moving said yoke, and springs surrounding each of said pistonsfor moving them in a direction opposite to that imparted by the.

o re. y 1S. in a lubricator, a pump element comprising a member having a pum cylinder formed therein, a piston in vsai c linder, a pair of substantially parallel guides extending rom said member and having slots therein, and a key member projectin from said piston and engaging withln sai slots. 19. In a device of the class described, in

combination, a pump elementv comprisin av pump cylinder, a piston therein, a dnve shaft for actuating said piston, means for intermittently actuating said shaft comprising a roller ratchet, and a second roller ratchet for engaging said shaft and con, structed and arranged to prevent rearward rotation thereof.

20. .ln combination in a lubricating device, a casing, a pump mechanism having a portion lying closely adjacent a'side wall l land its cylinder lying closely adjacent the bottom wall of said casing, a cover for said casing having an opening of relatively large diameter giving access to the space above and to one side of the pump mechanism,`and a strainer of large diameter extending downwardly into sald space from the opening.

a1. In a lubricating device, a casing, a pump element therein comprising a member providing a horizontally,7 arranged cylinder with inlet and discharge ports therefor, a. piston,. guides for the piston, and s ring means for moving-said piston in one irection and actuating mcha-nism located within said casing for movi g the piston in the opposite direction, said pump element being constructed and arranged whereby it may be removed from the casing as "a unit without disturbing the actuating mechanism.

22. In a lubricating device a casing forming a cistern for oil, a pump device within said casing comprising a piston and c 1in-- der, said piston and cylinder bein orizontally arranged and lying below t e normal level of oil in said cistern and means for supporting said piston and cylinder within the casing constructed and arranged to permit removal of said piston and cylinder from the casing as a unit without draining the oil therefrom. n 23. In combination in a lubricating device of the class described, a pump element comprising a pump cylinder and a discharge passage therefrom, check valves located within said discharge passage, a discharge pipe leading from said passage, and a termnal check valve within said discharge pipe, said valve. comprising a ball, a stem therein, and a heating element located adjan cent said pump device and arranged suhstantially parallel to said passageway.

vided with a pair 0f spaced apart legs having longitudinal fluid pa'ssageways therein,

and a membel` arranged between said legs and substantially parallel thereto and provided With a chamber for the reception of a heatinv'l medium. f

SignedD by me at Boston, Massachusetts, this fifth day of June 1920.

l PHILIP G. DARLING.

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