US682981A - Lubricator. - Google Patents

Description

No. 682,98l. Patented Sept. 17, I90L v F. w. EDWARDS.

LUBB-IGATOR.

(Application filed Mar. 1 6, 1899.)

(No Model.) 3 Shouts-Sheet I.

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From boner I WITNESSES A lNE/VTOH ATTORNEY.

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No. 682,98I Patented Spt. I7, l90l.

F. W. EDWARDS. LUBBICATOR.

(Application filed Mar. 16, 1899.) (No Model.) 3 Sheets-Sheet 2,

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No. sa2,9s|. Patented Sept. l7, l9fll. F. w. EDWARDS.

LUBBIGATOR.

(Application filed Mar. 16, 1899.) (No Model.) 3 Sheets-Sheet 3.

WITNESSES: I I VENTOR gm 4 M lwgw BY l ATTORNEY.

ham STATES PATENT OFFICE.

FRANK W. EDWARDS, OF LOGANSPORT, INDIANA.

LUBRICATOR.

SPECIFICATION forming' part of Letters Patent No. 682,981, dated September 17, 1901.

Application filed March 16, 1899.

To all whom, it may concern.-

Be it known that I, FRANK W. EDWARDS, a citizen of the United States, residing at Logansport, in the county of Cass and State of Indiana, have invented a new and useful Improvement in Lnbricators; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to lubricators of that class in which provision is made for the displacement of the oil'as condensation takes place and known in the art as condensationdisplacement lubricatiors.

The present invention has for its objects, among others, to provide for the overcoming of the back pressure from the steam-chest through the lubricant-supply pipe; also, to provide for the filling of the sight-tube with condensed steam when the same becomes exhausted, and also to provide against crossfeeding should the feed-tube become choked.

Still a further object is to provide means for preventing backflow of oil from the oilreservoir when condensation takes place in the boiler and the condensation-valve is left open. I provide a reversible choke plug whereby the same may be readily and automatically cleaned should it become clogged. Between the condenser and the oil-reservoir I inter-pose a connection, a'ifording communication between the condenser and the upper feed-arm, and in this passage I place avalve for controlling the passage of the live steam from the condenser.

I aim, further, at improvements in the details of construction whereby assemblage of the parts is facilitated and the operation of the device rendered more satisfactory.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically defined by the appended claims.

The invention is clearly illustrated in the accompanying drawings, which, with the letters and reference-numerals marked thereon, form a part of this specification, and in which Figure 1 is a longitudinal central section Serial No. 709,356. (No model.)

with parts in elevation. Fig. 2 is a rear elevation at right angles to Fig. 1 with parts in section and portions broken away. Fig. 3 is a diagrammatic view, partlyin section,showing the intercepting-valve designed for operation independent of the condenser-casting. Fig. 4 is an end View of the piston shown in Fig. 1. Fig. 4; is a top plan of the said piston and its valve. Fig. 4 is an end elevation of the valve. Fig. 5 is a sectional detail, on an enlarged scale, of the choke-plug and hand oiling-cup. Fig. 6 is a view, partly in plan and partly in section, showing the valve for controlling the passage of live steam from the condensing-chamber. Fig. 7 is a sectional detail showing a different form of connection with the intercepting-valve.

Like letters and numerals of reference indicate like parts throughoutthe several views.

As will be readily understood from the drawings and from the following description, this invention relates more particularly to lubricators of that class designed 'for use upon locomotives.

Referring now to the details of the drawings, A designates the oil reservoir or receptacle, provided with filling-apertu re closed by a suitable plug a. Upon the upper end of this cylinder is the casting B, in this instance shown as formed with depending screwthreaded neck engaged in a threaded open ing in the top of the cylinder, and to theupper face of this casting is detachablyconnected the condensing-chamber O, which supports the cylinder D, which constitutes both a cylinder, in'which works a piston, soon to be described, and a'supply-chamber.

E is the upper feed-arm, of which there are two shown; but it is evident that in triplefeed lubricators there would be three of these feed-arms. As they are all alike a description of one will suffice for all. Referring, then, to Figs. 2 and 5, it will be seen that the arm consists of a casting having a neck portion 6, by means of which it is affixed in position on the oil-reservoir, the passage 6 thereof communicating with the passage a in the thickened upper portion of the reservoir, and this passage by the channel a with the passage a and this in turn communicates with the vertical passage b in the connection B, as

shown clearly in Fig. 1. B is apipe secured in the connection B in line with the passage 1), as seen clearly in Fig. 1, and extends upward within the condensing-chamber C to receive live steam in a manner which will be more fully hereinafter set forth. E is a water-chamber in the upper feed-arm, and this chamber is put in communication with the passage a by the passage 6, as seen best in Fig. 2. The upper feed-arm may be provided with any well-known or desired form of hand oiling-cupE and cap E, as seen, forinstance, in Fig. 5. E is a nipple secured to the under side of the upper feed-arm, as shown best in Fig. 5, and designed for the attachment of the sight-tube F of usual construction. E is a valve within the water-chamber E, as seen clearly in Fig. 5, being seated upon a seat on the upper end of the nipple E and its stem guided in a suitable guideway, as shown more clearly in Fig. 5. e is a passage leading from the water chamber E through the lateral branche while 0 is an inclined passage for the oil from the oil-cup E both of these passages communicating with the oil-receiving chamber E, as seen clearly in Fig. 5. G is the choke-plug. It is disposed at right angles to the passage e as seen in Fig. 5, and near its inner end is provided with the transverse contracted or restricted passage g, adapted when the plug is in position to come coincident with the passage e provision being made for the seating of the inner end of the plug, as shown, so as to hold it in proper aliuement. The stem g of this plug passes through the branch e and is provided with a suitable handle G, a cap-nut G2 being also provided, as seen best in Fig. 5, and a spring G interposed between the inner end of this cap-nut and the outer end of the plug, serves to hold the plug to its position without the employment of packing. As shown, the plug is tapered andiits a correspondingly-shaped socket or seat, so as to make a tight joint at all times, the spring aiding in automatically insuring a tight joint as the plug wears. In practice when the lubricator is feeding should the passage 9 become clogged with dirt or other obstruction, so as to choke or close one side of the passage, a simple reversal of the plugthat is, a half-revolution thereof-will serve to bring the opposite or free side of the opening nearest the oil, so that the dirt or other obstruction will be forced out by the pressure of the oil. The spring will keep the valve to its seat notwithstanding this halfrevolution of the same. The water-chamber E. is connected by the passage h with a chamber. H in the outer portion of theupper feedarm E, as shown in Fig. 2, and in this chamher is located a valve or plug 72., shown in this instance as a tapered valve having a transverse passage h which communicates with the longitudinal passage h of said plug or valve, as seen in said Fig. 2. This valve has a stern h", extended through the cap 71. and provided with a suitable handle H, by means of which the valve may be turned when desired. As

' Fig. 2.

shown in Fig. 2, this valve is so turned as to atford communication between the water-chamber E and the by-pass H in the upper feedarm through the longitudinal passage h and the transverse passage 7L2 of the valve, so as to fill the sight tube or glass F. When the valveis turned at right angles to the position in which it is here shown, the communication between the water-chamber and the sight-tube will be shut ott' by reason of the transverse passage being brought otherwise than in communication with the by-pass in the feed-arm. By this means the sight-tube can be readily filled with condensed steam when the same becomes exhausted. It is to be understood that the valve or plug h is designed to be held in its adjusted position by friction, aided by a spring II, interposed between the cap and the outer end of the plug.

The oil-reservoir is provided with the usual drain pipe or plug 1, as shown in Figs. 1 and 2.

The receiving-arm and its accessories are shown in detail in Fig. 2, to which attention is now directed.

2 is a connection or coupling detachably engaged in a threaded opening in the reser voirA at its lower end and having the vertical extension 3, in which is arranged the tapered plug 4, having an opening 5 in the wall thereof adjacent the reservoir, so as to register with the passage 6 in the valve, which is mounted within the said plug. This valve 7 is tapered, as shown, and is provided with a stem 8, passing through the cap-nut 9 and provided with the handle 10. Within the plug between the cap-nut and the outer end of the valve is a spring 11, a collar orsleeve 12 being in this instance shown as hearing against the cap-nut and receiving the outer end of the spring, although this collar or sleeve may sometimes be dispensed with. It will be evident that the plug is so fitted as to form a perfectly steam-tight joint, the shoulders at the inner and outer ends thereof being provided in order to assist in the accomplishment of this end. The upper end of the vertical extension or portion 3 is connected with the lower end of the sight-tube, as shown in The plug 4 is provided with a passage 13, which serves as an outlet for the oil, from which it passes drop by drop through the sight-tube in the usual manner. 14 is a plug provided for the purpose of affording ready access to the interior of the receivingarm, as well as access to the means for affixing the end of the feedpipe in position. The plug and its valve may be readily removed when desired and a new valve or plug inserted in case the old one should become worn.

15 is the feed-pipe from the reservoir to the receiving-arm. It is secured in position in the following manner: Its lower end is extended horizontally and is inserted through the bore of the lateral portion of the receivingarm, as seen at the left of Fig. 2, its outer end being screw-threaded to receive the jam-nut 16, which is screwed thereon, as seen in said Fig. 2 at the left, a collar 17 being provided at the inner end which is brazed on and bears against the inner end of the threaded portion of the horizontal part of the arm. This serves to hold the feed-pipe steady. Within the cylinder D is mounted to slide the piston I, carried by a piston-rod I, and, as seen in Fig. 1, this piston-rod is disposed horizontally and carries at its outer end a piston-valve l ,which is mounted to work within the extension 2' of the cylinder. This extension in this instance is provided at the outer end of the coupling '1), joined to'the outer end of the cylinder; but it is evident that other provision may be made for this purpose. The piston-rod or stem of these valves carries a slide-valve J, which is held between collars 2' on the stem or pistonrod, and thus prevented against displacement, the upright portionsj of the valve serving to allow of the necessary movement of the valve to permit it to automatically adjust it self to its seat. This slide-valve is designed to open or close the port K, which communicates with the pipe L, soon-to be described, it being understood that there are two of these pipes L, as seen in Fig. 2. I

M represents pipes the upper ends of which communicate with the cylinder D behind the piston or valve I, as seen best in Fig. 1, and their lower ends lead into the lower portions of the oil-receiving chambers E beneath the injectors therein, the point of connection of the pipe M with this chamber being seen clearly in Fig. l. The lower ends of the pipes L communicate with the upper ends of the oil-receiving chambers E, as shown best in Fig. 1. As seen in Fig. 1, the ends of the pipes L and the injectors N abut, and the capnut it serves to secure them in position and to form the joint between the same and the chamber. Any well-known form of injecting arrangement may be employed. That shown serves its function satisfactorily.

0 represents the tallow pipes or the pipes for delivering the lubricant to the parts to be lubricated. They are shown as connected to the lower ends of the oil-receiving chambers E by cap-nuts 771, so as to form tight joints. It will of course be understood that in lieu of the cap-nuts herein shown as means for connecting the pipes and other parts other means may be employed, and I do not wish to restrict myself to the precise construction and arrangement of parts in this regard as herein shown. Equally as good results may be attained by other means without affecting the operation of the essential features of the invention. Under some circumstances one pipe M may be found sufficient, and I therefore do not wish to be limited in this regard.

For controlling the passage of live steam through the pipe B to the water-chamber E I provide a valve P. (Seen in cross-section in Fig. 1 and in plan in Fig. 6.) This valve is tapered, as shown, and fits a correspondinglyshaped seat in the casting B and has the transverse port 0, which when the valve is turned, as seen in Fig. 1, alines with the port or passage I), through thesaid part B and affords communication between the pipe B and the water-chamber E through the passages a a a, and e, as will be readily understood from Fig. 2 when taken in connection with Fig. 1. This valve has a stem 19 and a handle p and a cap-nut and'spring similar to the construction shown in Fig. 5 in connection with the choke-plug and for a similar purpose.

Referring now to Fig. 1 and also to Fig. 6, it will be noticed that the casting B has a lateral extension B which is exteriorly threaded, as seen at 6 to receive a cap-nut b and interiorly threaded to receive a screwvalve Q, having a stem q and a hand-wheel or analogous provision Q. This valve is adapted to a seat in the casting B, as seen best in Fig. 1, and is adapted to control the passage of the water of condensation from the 0011- densing-chamber O to and through the pipe R. The said water of condensation passes from the condensing-chamber through the port B and thence through the port B in the casting B, which passages are best seen in Fig. 1. At the junction of these two passages-I place a check-valve S, (seen also in Fig. 1,) and this is adapted to a seat on the casting B, practically at the junction of the two passages, and is disposed at substantially right angles to the valve Q. A removable plug S permits of the ready access to said check-valve for the purpose of repairs or any other cause. This plug is cored to provide for the necessary'movement of the stem of the check-valve. T represents similar checkvalves located at the junction of'the passages a and a as shown in Fig. 2. Onlyone is seen in Fig. 2; but it is to be understood that there is another at the junction of the passages a and a at the other side of the oilreservoir. Removable caps or plugs T are here provided for the same purpose as the removable cap or plug S just described in connection with the check-valve S. U is a connection for receiving live steam from the steam-space of the boiler. This communicates by way of the vertical passage Y with the cylinder D, as seen in Fig. 1, and

also by way of the port V with the upper end of the condensing-chamber C, a checkvalve W being provided at the junction of the passages U, Y, and V, as seen in Fig. 1, which check-valve is normally open-that is, when steam is being admitted through the passage U, but which closes when the steam is shut off. The vertical passage Y is provided in the vertical leg ofthe coupling,which is joined at its lower end to the coupling 2', and the neck or nipple 0 receives the end of the pipe through which the horizontal communication is formed, suitable cap-nuts or the like being employed to insure tight joints.

The device may be mounted in positionin.

any desired manner. In Fig. 1 the oil-reservoir A is shown as provided with a screwthreaded stud A for this purpose.

With the parts constructed and arranged substantially as above described the operation is as follows: Assuming that steam from the boiler is shut off, the parts will be in the position in which they are shown in Fig. 1. Now as steam is admitted from the boiler through the passage U the check-valve W is opened and live steam admitted into the condenser O, and at the same time into the cylinder D between the two diderential pistons I and 1 holding the valve J in its central position, that shown in said Fig. 1 closing the port K. Now this being the condition when the throttle-valve of the engine is closed, should the throttle-valve be opened a pressure is created in the steam-chest, which in turn creates a pressure in the pipe 0 and through the pipe M upon the rear of the piston I, forcing the latter in the direction of the arrow in Fig. l and moving the valveJ so as to open the port K. When the port K is opened, steam at boiler-pressure (which is greater than the back pressure through the pipe 0) passes from the cylinder D through the port K and pipes L into the injectors N and into the oil-receiving chambers E of the upper feed-arms, it being understood that the lower ends of the injectors N are below the bottom of the said chambers, so as to create a suction to cause the oil through the passage 6 to pass down the pipe 0 to the steam-chest. This condition of affairs remains so long as the throttle-valve is open and steam is admitted from the boiler, insuring asteady supply of oil to the steam-chest when the engine is working under a full pressure of steam. When the throttle-valve is closed,pressure through the pipes M is shut off, when the steam from the boiler acting upon the piston I restores the Valve J to its normal position, closing the port K, but the check-valve W remains open and the live steam passes to the condensing-chamber C, furnishing condensation for the displacement of the oil in the reservoirA in a manner which will be readily understood. It is to be understood that some provision should be made to prevent the piston I from moving so far to the left in Fig. 1 as to fully cover the port or pipe M. In Fig. 1 the cylinder D has its inner end rounded for this purpose; but this is but one of the constructions that may be employed. The valve Q being opened,the water of condensation from the condensing-chamber G passes through the port B lifting the check-valve S, and through the passage B into the pipe R and displacing the oil in the reservoir A, which oil in turn passes through the pipe 15 and through the passages 5, 6, and 13, and through the sight-tubeF into the chamber E, and from thence through the passage 6 and through the passage g of the chokeplug into the receiving-chamber E, and from W thence through the pipe 0 into the steamchest, it being understood that during this operation the valve 7 is opened, as shown at the left of Fig. 2, insuring a supply of oil to the steam-chestin case the engine runs a great distance with the throttle-valve closed. In order to provide for the interception of crossfeeding of the oil, I employ the check-Valve T, hereinbefore described and seen in position in Fig. 2. Should the choke-plug become clogged, the oil would accumulate in the chamber E and backflow through the passages a, a and a and across to the other side; but by the interposition of my checkvalve T the oil would act to close the said valve, and thus prevent this cross-feed, as will be readily understood from Fig. 2. The valve T is of course held open in the normal condition of affairs by the pressure of the steam coming through the passages a a and acting upon its under face. The check-valve S serves a similar function in connection with the backflow of oil from the oil-reservoir through the pipe R in case the valve Q is left open when the lubricator is not in service or when condensation takes place in the boiler. The valve W may sometimes be omitted, depending upon the valve S for preventing interception, as above described. It is sometimes desirable to admit water of condensation to the sight-tube-as, forinstance, when the same becomes exhausted-and for this purpose I have provided the construction shown in detail at the right of Fig. 2 at the upper portion of the oil-reservoir and which has been previouslydescribed. Its operation is as follows: Normally the valve h is closed. In Fig. 2 it is shown as open, so that the water of condensation may pass from the chamber E through the port 71, through the port it and port it in the valve, and thence by way of the passage H into the sight-tube, thus speedily filling the same with the water of condensation from the chamber E, into which it has passed in a manner above described.

Modification in the details of construction and in the arrangement of parts may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages. For instance, in Fig. 3 I have shown a somewhat different form and arrangement of intercepting-valve. In this View the cylinder D corresponding to the cylinder D in Fig. 1, is disposed vertically instead of horizontally and at a distance from the condensing-chamber. In this cylinder works the piston 18, having a stem 19, carrying a smaller piston 20, workingin a suitable chamber 21, and the stem extended beyond the smaller piston, as shown, and designed to contact with and actuate a check or other valve 22, adapted to a seat on the nipple 23, which is designed for connection with the steam-space of the boiler and located in any desired position. O represents the tallowpipes or pipes for delivering the oil, and in this arrangement these pipes are connected to the coupling or branch 0 from which extends the pipe M leading to the chamber D back of the piston 18. 24 is a pipe leading from the coupling 25 and connected with the coupling 26, to which is connected the pipe L corresponding to the pipe L in Figs. 1 and 2 and of which there may be one or more, and

which pipe is designed to lead to the oil-re-- ceiving chamber E containing the injector. From the opposite side of the valve 22 there extends a pipe 27, communicating with the passage 28, which communicates by the passage 29 with the port 30, which communicates by the pipes 31 and 32 with the upper end of the condensing-chamber C. At the junction of the passages 28 and 29 I arrange a check-va1ve 33, while at the intersection of the passages through the pipe Y and the pipes 31 and 32 I arrange an other check-valve 34:. The operation of this form of construction is in all respects similar to the corresponding parts in Figs. 1 and 2. Normally the valve 22 is closed. When the throttlevalve is opened, back pressure in the pipe O exerts its influence against the back side of the piston 18 and forces it in the direction of the arrow in Fig. 3, and as this piston is moved its stem contacting with the valve 22 opens the same and admits live steam from the steam-space of the boiler through the nipple 23. The steam at boiler-pressure then passes through the pipe 24 into the pipe 26, thence through the chamber 35 into the pipe or pipes L and from thence takes the same course as the steam in the pipes L in the form shown in Figs. 1 and 2. At the same time steam is admitted to the condensing-chamber 0 through the passages 27, 28, 29, 30, 31, and 32. The check-valve 34E serves to prevent steam under pressure entering the pipe Y while the Valve 33 prevents backflow from the condensing-chamber, it being understood that the check-valve 34 is provided for the purpose of preventing live steam from entering the steam-chest while the engine is standing still.

In Fig. 7 is shown a construction embodying a portion of what has just been described in connection with Fig. 3, the connections from the under side of the valve 22, however, being omitted, except, of course, the connection to the boiler. By this means I am en- 'abled to supply live steam to the pipe L and to the condenser when the engine is in service; but when the throttle-valve is closed, shutting off pressure on the rear of the piston through the pipe M ,and the valve 22 is closed live steam cannot enter either the condenser or the pipe L This is desirable in many cases,especially in local or yard service,where the engine is liable to remain idle for perhaps hours at a time.

Other like changes I should consider as falling within the scope of my invention, and therefore do not intend to limit myself to the precise construction and arrangement'of parts herein disclosed.

hat is claimed as new is-= 1. In a-lubricator, the combination with the upper feed-arm, a cylinder having a port, and a pipe in communication therewith and leading to the oil-receiving chamber of the said feed-arm, a differential piston in said cylinder, a valve detachably connected with the piston between its ends for controlling said port and arranged to act in unison with the piston, a connection between the cylinder at the rear of the piston and the oil-delivery pipe, which latter delivers oil to the steamchest, and a connection between the cylinder and the source of live steam from the boiler, and arranged to deliver steam between the heads of the diiferential piston, as set forth.

2. In a lubricator, a cylinder having connection with asource of live steam from the boiler, and a port for the passage of live steam from said cylinder to the oil-receiving chamber of the upper feed-arm, the upper feed-arm with independent oil-receiving chamber and water-chamber, a differential piston working in said cylinder, a valve working in conjunc tion with the piston to control said port, a connection betweenthe cylinder at the rear of the piston and the oildelivery pipe, and a choke-plug interposed between the oil-receiving and water chambers of the said feedarm, as set forth.

3. In alubricator, the combination with the condenser,the oil-reservoir of the cylinder and its piston and the' upper feed-arm having oilreceiving chamber, means for admitting steam to said cylinder to actuate said piston, of the Oil-delivery pipe, an injector in said chamber with its lower end extended beyond the lower end of said chamber and its upper end receiving steam at boiler-pressure, and a connection between the oil-delivery pipe below the injector and the cylinder back of the piston, all substantially as and for the purpose specified.

4. 'In a lubricator, a feed-arm having detachable depending nipple, hand-oiler, waterchamber and oil-receiving chamber with passages affording communication between the hand-oiler and the oil-receiving chamber and between said chamber and the water-chamber and a valve in said feed-arm controlling said passage.

5. In a lubricator, a condenser having a lateral extension with detachable outer end portion, a differential piston having two heads working in said cylinder extension, a connection between said extension and a source of steam-supply, and a port leading from said extension to the tallow-pipe, and a valve carried by the piston and loosely supported by the same between the piston-heads and a connection between the tallow-pipe and the back of the piston.

(3. In a lubricator, the combination with a condenser having a laterally-projecting extension, of a hollow casting formed with four branches one for connection with said extension, one for connection with the boiler and one for connection with the condenser with an offset junction and a valve-seat at said junction, and a removable closure for the other branch opposite said seat, as set forth.

7. In a lubricator, the combination with a condenser having a laterally-projecting extension, of a hollow casting formed with four branches one for connection with said extension, one for connection with the boiler and one for connection with the condenser with an offset junction and a valve-seat at said junction, a removable closer for the other branch opposite said seat, and a valve in said casting fitted to said seat and operated in one direction by steam from the boiler, as set forth.

8. In a lubricator, the combination with a condenser having a lateral extension, of a coupling on said extension, a closing-cap on. said coupling in line with the extension, said parts forming a cylinder having inlet and outlet ports, and a hollow casting secured to the coupling and extending at right angles thereto and having means for connection with the top of the condenser.

9. In a lubricator, the combination with a condenser having a lateral extension, the back-pressure pipe leading thereinto, of a coupling mounted on the extension, a cap on said coupling in line with the extension and closed at one end to form the outer end of a cylinder formed by said extension and comp ling, the coupling having a port, a differential piston having two heads working in said cylinder, a steam-supply pipe admitting live steam between the heads of the piston and a valve movable with the piston for controllingsaid port.

10. In a lubricator, the combination with the tallow-pipe and the condenser, of a cylinder connected with the condenser, a backpressure pipe leading thereinto, a difierential piston having two heads working in said cylinder, said cylinder having a port leading therefrom and a connection for a supply of live steam between the heads of the piston, and aslide-valve mounted loosely on the stem of the piston between its ends for controlling said port.

11. In a lubricator, the combination with the tallow-pipe and a cylinder and connections with the tallow-pipe and with the condenser and source of live steam, of a feed-arm having an oil-receiving chamber, a differential piston in said cylinder and having two heads, and steam-tight at its ends, a valve carried by and between said heads, a pipe leading to said cylinder back of one of the said heads, an injector extending into the oilreceiving chamber of the feed-arm, a connection with the talloW-pipe below the injector, the port in the cylinder being controlled by said valve, as set forth.

12. In a lnbricator, the combination of a condenser with a lateral extension having a port, a coupling detachably secured thereto, with a port in its lower wall and a port in its upper wall, and a closure detachably secured to said coupling, the extension, coupling and closure forming a cylinder and permittingof the ready removal and insertion of a piston.

13. In a lubrioator, the condenser having a lateral extension having a port, the coupling detachably connected therewith and having upper and lower ports, a closure detachably secured to the coupling, and a hollow casting detachably connected to the coupling at the upper port and having double T-joints.

FRANK W. EDWVARDS. lVitnesses:

- E. W. Bonn, R. R. BOND.

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