US720121A - Oil-pump. - Google Patents

Description

No. 720,121. PATENTED FEB. 10.1903.

0. W. ENOS. OIL PUMP. APPLIQATION FILED MAY 24, 1902.

N0 MODEL.

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AM ullllllllllilllllllllllllllllllllllllllllllllfllllllallllllln No. 720,121. PATBNTED FEB. 10, 1903. G. W. ENDS. OIL PUMP.

APPLICATION FILED MAY 24, 1902. H0 MODEL.

2 SHEETS-SHEET 2.

NITED STATES PATENT OFFICE.

CHARLES \V. ENOS, OF PEABODY, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO JOHN BOETTNER, JR., OF PEABODY, MASSACHUSETTS.

OIL-PUMP.

SPECIFICATION forming part of Letters Patent No. 720,121, dated February 10, 1903.

Application filed May 24, 1902. Serial No. 108,848. (No model.)

To all whom it nuzy concern:

Be it known that LCHARLES W. ENos,a citizen of the United States, residing at Peabody, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Oil-Pumps, of which the following is a specification.

The object of this invention is to provide an oil-pump which is particularly adapted for an oil-pump lubricator for steam-engines.

The invention consists of a plunger, an exteriorly-screw-threaded sleeve mounted thereon, tappets adj ustably fastened to said plunger at opposite ends of said sleeve, a stationary nut engaging the screw-thread upon the exterior of said sleeve, and means to rock said sleeve within said nut and cause said sleeve to alternately contact with said tappets and impart areciprooatory motion to said plunger for the purpose specified.

The invention finally consists in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims thereof.

Referring to the drawings, Figure 1 is a central vertical section through an oil-pump constructed in accordance with my invention, a portion of the same being shown in elevation. Fig. 2 is a detail vertical section taken on line 2 2 of Fig. 4. Fig. 3 is a detail side elevation of the screw-threaded sleeve, plunger, and rocker-arm. Fig. 4 is a horizontal section taken on line 4 4 of Fig. 1 looking downwardly in said figure. Fig. 5 is a section taken on line 5 5 of Fig. 1 looking downwardly in said figure. Fig. 6 is a side elevation of the parts shown in Fig. 5. Fig. 7 is a horizontal section similar to Fig. 4, illustrating myinvention as appliedto a plurality of plungers actuated by a single reciproca tory slide and all of said plungers pumping from a single reservoir.

Like'numerals refer to like parts through.- out the several views of the drawings.

In the drawings, 10 is a standard adapted to be attached to the frame of an engine.

11 is an oil-reservoir consisting of a base 12, a cylindrical glass oil-cup 13, fast to said base and provided with a top 14, said base,

top, and cup being joined together by a central rod 15, oil being introduced through the tubular filler 16 and sieve 17. The base 12 is provided with a shank 18, fastened to the standard 10 by a set-screw 19. The base 12 is provided with a cylindrical horizontal oilpassage 20, extending thereaoross. A plunger 21 is located in said passage and is adapted to slide lengthwise thereof and through a packing-box 22 at the right-hand end thereof, Fig. 1. The plunger 21 is extended beyond the packing-box to the right of said Fig. 1 and has a sleeve 23 rotatably mounted thereon. The sleeve 23 is provided upon its periphery with a screw-thread 24, which engages a stationary nut 25, provided with a cross-bar 26, Fig. 4, said cross-bar being fastened by screws 27 27 to standards 28, integral with the base 12.

A rocker-arm 29 is fastened bya set-screw 30 to the right-hand end of the sleeve 23. Said rocker-arm is preferably cylindrical in cross-section, Fig. 5, and has a stud 31 adjustably fastened thereto by a set-screw 32 and provided witha handle 33, integral therewith, by means of which the rocker-arm 29 and sleeve 23 may be rocked by hand when desired.

The plunger 21 is provided with a screwthread 34 to receive nuts 35 35, one of said. nuts being located at each end of the sleeve 23 and held in place by set-nuts 36 36. The nuts 35 constitute tappets and may be adj usted toward and away from the sleeve 23, so

that as the said sleeve is rotated the distanceto which the plunger 21 is reciprocated by said rotation, as hereinafter set forth, may be increased or diminished. A rocking motion is imparted to the rocker-arm 29 and to the sleeve 23 by a link 37, pivotally attached to the stud 31 at one end -and to an arm 38 at the other end, said arm being rigidly fastened to a reciprocating piece, such as the valverod 39 of an engine.

At the left-hand end of the passage 20 a connecting-pipe 40 is screwed into the base 12 at one end and into an elbow 41 at the other end. A pipe 42 connects the elbow 41 to a two-way cook 43. The pipe 44 leads from the cook 43 to the cylinder or steam-pipe of the engine which it is desired to lubricate.

A tube 45 is fastened to the cook 43 and is turned downwardly at the outer end thereof, terminating above the filler 16. Aball checkvalve 46 is provided in the connecting-pipe 40. A port 47 opens out of the oil-passage and is connected by a pipe 48 with the interior of the oil-reservoir 11. A check-valve 49, Fig. 2, is provided in the pipe 48.

The operation of the pump as a whole is as follows: The rocker-arm 29 and sleeve 23 are given a rocking motion by the link 37, arm 38, and valve-rod 39. As the sleeve 23 is rocked and as the nut 25, with which said sleeve has screw -threaded engagement, is stationary, said sleeve moves toward the right and left, Fig. 1, and abuts alternately against the tappets 35, thus imparting to the plunger 21 a reciprocatory movement lengthwise of the oil-passage 20. As the plunger moves toward the right, Fig. 1, avacuum will be formed in the oil-passage between the end of the plunger and the check valve 46. As soon as the lefthand end of the plunger passes toward the right beyond the port 47 oil will enter the passage 20 through the pipe 48 from the oilreservoir 11. As the direction of motion of the plunger 21 is reversed, so that said plunger moves toward the left, Fig. 1, a portion of the oil in the passage 20 will be forced past the check-valve 46 and through the elbow 41, pipe 42, cock 43, and pipe 44 to the cylinder of the engine or to the steam-pipe connecting with the valve-chest of said engine. Thus it will be seen that at each stroke of the engine a small amount of oil is driven from the pump to the cylinder of the engine, and this amount may be regulated according to the distance that the plunger 21 is reciprocated by the sleeve 23 and rocker-arm 29, and this distance may be increased or diminished by adjusting the tappets 35 toward or away from the sleeve 23 and also may be further adjusted by moving the stud 31 upon the rockerarm 29 toward'or away from the plunger 21, it being evident that the nearer said stud is brought to the sleeve 23 and plunger 21 the greater will be the angle through which said rocker-arm will be rocked for a given motion of the valve-rod.

While I prefer to use the pipe 48 and checkvalve 49 therein, said pipe may be dispensed with and the oil allowed to enter the passage 20 from the reservoir 11 directly through the port 47; but in the latter case the plunger 21 will not force oil through the pipe 42 until the left-hand end of said plunger has closed the port 47, while with the pipe 48 and checkvalve 49 attached to the base 12 the plunger will begin to force the oil through said pipe 42 immediately upon the commencement of the motion of the plunger 21 toward the left in Fig. 1. By turning the two-way cock from the position shown in Fig. 1 to a position at right angles thereto the oil may be forced through the pipe 42 and tube instead of through the pipes 42 and 44, as hereinbefore described, so that at each stroke of the engine it may be seen whether the pump is operating as desired, thus forming a convenient means of testing the same.

It will be seen that the construction hereinbefore described is very durable and simple and may be adjusted to a nicety in order to obtain the desired amount of oil at each stroke of the engine. It will again be seen that by detaching the link 37 from the stud 31 the oil may be pumped by hand by rocking the rocker-arm 29 by means of the handle 33, this often being a desirable feature in devices of the construction hereinbefore set forth. It will also be seen that by disconnecting the link 37 from the stud 31 the sleeve 23 may be rotated by means of the rocker-arm 29 and handle 33 and withdrawn, together with the plunger 21, from the base 12, leaving the oilpassage 20 entirely open from the right-hand end thereof, so that the same may be readily cleansed and so that the check-valve 46 may also be reached for the purpose of cleansing the same.

In Fig. 7 I have illustrated a modified form of my invention in which a single oil-reservoir supplies a plurality of oil-pumps, said oilpumps being connected by a plurality of pipes to two or more cylinders. In the particular form illustrated in Fig. 7 only two pumps or plungers are illustrated; but it is evident that the number may be increased to any desired extent by increasing the size of the reservoir. In the form illustrated in said Fig.7 the rockerarm 29, sleeve 23, nut 25, tappets 35, and setnuts 36 are duplicates of the form illustrated in Fig. 1; but instead of attaching the tappets 35 and sleeve 23 directly to the plunger of the pump said tappets and nuts have screwthreaded engagement with a reciprocatory rod 50, the sleeve 23 being rotatably mounted upon said rod. The left-hand end of the rod 50, Fig. 4, is fastened to a cross-bar 51, fast to the plungers 52 52, said plungers operating the same as the plunger 21, hereinbefore described, to force oil through pipes 53 5357 57 and each plunger reciprocating in oil-paspages 54 54, formed in the base 55. Each of the oil-passages 54 is connected bya port with the interior of the oil-reservoir 56, said port being preferably connected by pipes 58 to the interior of said reservoir, each of said pipes 58 being provided with a check-valve, as hereinbefore described with reference to the pipe 48 and check-valve 49.

While I prefer to attach the tappets 35 to the plunger 21 or to the rod by screw-threading said plunger or rod and holding said tappets in position upon the plunger by means of set-nuts, for the reason that such construction affords an accurate means of determining the amount of play given to the sleeve 23 before abutting against the tappets, as hereinbefore described, it is evident that said tappets may be constructed as collars, the screwthread upon the plunger 21 being left off and said collars fastened to the plunger by set- I screws without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire by Letters Patent to secure, 1s

1. In an oil-pump, a plunger, a screw rotatably mounted thereon, tappets fast to said plunger at opposite ends of said screw, a stationary nut having screw-threaded engagement with said screw, and means to rock said screw within said nut and impart a reciprocatory motion to said plunger for the purpose specified.

2. In an oil-pump, a plunger, an exteriorlyscrew-threaded sleeve mounted thereon, tappets adj nstably fastened to said plunger at opposite ends of said sleeve, a stationary nut engaging the screw-thread upon the exterior of said sleeve, and means to rock said sleeve within said nut and cause said sleeve to alter-' nately contact with said tappets and impart a reciprocatory motion to said plunger for the purpose specified.

3. In an oil-pu mp, a plunger, an exteriorlyscrew-threaded sleeve mounted thereon, tappets having screw-threaded engagement with said plunger at opposite ends of said sleeve, a stationary nut engaging the screw-thread upon the exterior of said sleeve, a rocker-arm fast to said sleeve, and means to impart a rocking movement to said rocker-arm, whereby a reciprocatory motion is imparted to said plunger for the purpose specified.

4. In an oil-pump, a plunger, an exteriorlyscrew-threaded sleeve mounted thereon, tappets having screw-threaded engagement with said plunger at opposite ends of said sleeve, a stationary nut engaging the screw-thread upon the exterior of said sleeve, a rocker-arm fast to said sleeve, a stud adj ustably fastened to said rocker-arm, and a link pivotally connected to said stud and adapted to be pivotally connected to a reciprocatory valve-rod.

5. In an oil-pump, a plurality of plungers, a reciprocatory rod fast to said plungers, an exteriorly-screw-threaded sleeve mounted upon said rod, tappets fast to said red at opposite ends of said sleeve, a stationary nut engagipg the screw-thread uponthe exterior of said sleeve and means to rock said sleeve within said nut and cause said sleeve to alternately contact with said tappets and impart Witnesses:

CHARLES S. GOODING, JOHN BOETTNER, Jr.

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