US275680A - Measuring-pump - Google Patents

Description

(No Model.) r 3 Sheet-Sheet 1. 'H. E. MAROHAND.

' MEASURING PUMP.

No. 275,680. Patented Apr. 10,1883.

3 Sheets-Sheet 2.

E. MARGHAND.

MEASURING PUMP.

mvew Zor fire/ 1. flanzazul (No Model.)

' 3 Sheets-Sheet 3.v

H. E. MAROEAND.

MEASURING PUMPF No. 275,680

. Patented Apr. 10,1883.

x. M I 1 u II J Inwmior flarezazul UNITED STATES PATE T OFFICE.

.HENRY E. MAROHAND, OF ALLEGHENY CITY, PENNSYLVANIA.

MEASURING-PUMP.

SPECIFICATION forming partof Letters Patent No. 275,680, dated April 10, 1883.

' Application filed January 11, 1883. (No model.) I

To all whom it may concern.-

Be it known that I, HENRY E. MARGHAND,

' a citizen of the United States, residing-at Allegheny City, Allegheny county, Pennsylvania, have invented new aud'useful Improvements in Measuring-Pumps, of which the following is a specification.

The present invention relates to improvements upon the measuring-pump forming the subject-matter of Patent- No. 264,312, granted to me on the 12th day of September, 1882.

The object of the invention is to provide sim-' ple and ett'ective means for packing the shaft or arbor which serves to impart a reciprocating movement to the double-headed piston, to

' adjust from the outside of the pump-cylinder the eccentric or wrist-pin block which serves to throw the piston back and forth,this ad-' justment, being for the purpose of varying the throw or movement of the piston, and, furthermore, to provide a piston of a. uovelcous'truction which possesses decided advantages over the piston used in the pump heretofore patented to me.

To these ends the invention consists inthe construction and combination of devices which will be fully described hereinafter, and then pointed out in the claims.

In the drawings, Figure 1 is a perspective view, showing the relative positions of a barrel-measuring pump andvessel to be filled.

Fig. 2 is a vertical sectional view taken trans-i vers'ely through ameasuring-pump construct-4 ed according to the present invention-f Fig. 3

is a longitudinal sectional view taken vertically-i through the side .of the measuring-pump on{ which thepiston-operatin g devices are located. Fig.4 is a perspective view of the doubleheaded piston, showing its liquid-chamber and vertically-movable valves. Fig. 5 is a. longitudinal sectional view of the piston. Figs. 6, 7 8, and 9 are detached views of the packingplug, piston-operatiu g block, and tapering bolt.

The letter A designates the pump-cylinder, which is closed at its ends by the detachable heads B, securely fastened to the ends of the cylinder. The cylinder has the bottom chamber, a, into which the liquid enters from the barrel or other reservoir through the centrallylocatedtube b. The end heads, B, are provided with vertical chambers c, which communicate at all times with the inlet-chamber a, as is clearly shown in Fig; 3, while the communication of these chambers with the pistonchamber is through ports d, normally closed 5 by inwardly-movable valves (3. .The stems of these valves project into tubular projections on the cylinder-heads, and are encircled by ,spriugsf, for pressing the valves into their seats.

The parts just described are also found in my previous patent, and need not be more precisely described.

The working-chamber of the cylinder contains a double-headed piston,D, which, instead 6 of being constructed of twoindependent heads rigidly connected together by bolts and provided with horizontally-movable spring pressed valves, is in the present instance constructed -of a solid cylindrical body, apertured or retering liquid and held closed by their own;

weight. The side of the piston opposite the -liquid-chamber is provided with a recess, 'i, having curved sides, as is shown in Fig.3,iapd this; recess is traversed vertically by a groove, 8 5 j, which extends from the top to'the based :5 the piston.-: 5A block,'K, operates in theire'cess t of the piston, and a wrist-pin, L, on the inher face of said block, moves up and down in the groovej, also formed in said piston. The block K has a square or quadrangular seat or recess, M, on the face thereof adjoining the cylinder, and a slot, N, extending across the inuer or piston side of the block, opens into said recess or seat, and is bordered at its ends 5 by the short grooves O, as is clearly shown in Figs. 8 and 9. A cylindrical extension or tube,

P, forming part of the side of the shell of the cylinder, receives a cylindrical plug, Q, which has a conical enlargement or swell,R, near its to; outer end and a square projection, S, at its inher end. The conical enlargement R of the plug is seated in the flaring or correspondingly-shaped outer end or mouth of the tube 1, and a screw-threaded cap, T, applied to the end of said tube, has an outer flange, which bears against the enlargement 1t and serves to press the same into its seat. The flaring seat of the tube and the correspondinglyshaped enlargement of the plug Q. produce a liquid-tight joint, and no additional packing devices are required to guard against the working out of liquid through the tube on the cylinder. The plug is extended beyond the latter and receives the handle or crank U,which is securely fastened to the plug for the purpose of turning the same. The square projection S at the inner end of the plug tits into the recess or seat M of the wrist-pin or eccentric block, and these parts are firmly locked to each other, so as to turn together, by means of a tapering stem or bolt,V, which passes through an axial bore of the plug, and is firmly secured in place by a nut, 0, applied to its screwthreaded outer end, or the part thereof projecting beyond the plug. The stem or bolt V has an cccentricalIy-arranged pin or stud, \V, at its inner end,which is passed through the recess M and slot), and lies on the inner or wrist-pin side of the block K. The recess M is made somewhat longer than the projection S, so that the block K can be adjusted or moved up and down for varying the throw of the piston, according to the exigencies of the case. It will be observed that the stem V is loosened in the plug when the outer nut, 12, is properly turned, whereupon the block K can be adjusted or moved upanddown on the square end of the plug through the medium of the eccentric end portion of the stem. The block having been adjusted so as to set the wrist-pin higher or lower in the workinggroove in the piston, the nutisagain tightened for locking the block, stem, and plug together, so as to cause these parts to turn together.

The principle of operation of a pump constructed according to the present invention is the same as in my previous patent, it being manifest that as the piston moves from either head of the cylinder the vacuum created in the cylinder will cause the valve at the receding end of the cylinder to open, as is shown in Fig. 3, and permit liquid to enter the cylinder, and during the return-stroke of the piston the liquid which has thus entered is caused to Youter the chambered piston by the opening of the upwardly-movable valve and pass from the piston through the discharge-pipe W, which communicates with the chamber in the piston during its entire stroke. The lengthening or shortening of the stroke of the piston by the means described will permit the amountof liquid received into the cylinder and ejected therefrom to be varied, as will be manifest.

Having thus described my invention, what I claim is- 1. The combination of a double-headed piston having a segmental liquid-chamber, inletports opening into said chamber through the heads of the piston, and vertically-movable valves fitted in said ports, with suitablemeans for reciprocating the piston, and a cylinder having end inlet-valves and discharge-pipe communicating with the chambered piston, substantially as and for the purpose set forth.

2. The combination of a reciprocating piston having a vertical recessand groove, and a block with a wrist-pin oran eccentricarranged therein, with a cylinder having inlet and discharge ports, and an arbor or shaft carrying said block or eccentric, substantially as and for the purpose set forth.

3. The combination of the plug having a conical ortapering enlargement and asuitable handle, and a piston-cylinder havinga tubular extension provided with a daring mouth, with an eccentric or wrist-pin block anda reciprocating piston, substantially as and for the purpose set forth.

4. The combination of an adjustable eccentric or wrist-pin block havinga rectangular recess and slot communicating therewith, the plug provided with an axial bore and rectangular inner end projection, and the tapering stem having an end stud or pin with the recessed piston, and the cylinder having a tube for the reception of the plug, substantially as and for the purpose set forth.

In testimony whereof Ihave hereunto set my.

hand in the presence of two subscribing witnesses.

HENRY E. MARCHAND. -Witnesses:

JAMES L. Noanrs, J. A. RUTHERFORD.

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