US193227A - Improvement in mine-pumps - Google Patents

Description

2 Sheets-Sheet 2.

E. DAGGETT.

Eatented 31.113717, 18'7'7.

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N, PETERS, PHOTO-L'ITMOGRAPHER. wAsHxNGToN, D C.

tent, anyneces'sity for the well-known sothereby causing the column of water to wholly lvide"d"vvith vastufling-box'in its bottom, with of my invention. "'Figs. 3, 4, 5, and 6 repre- UNITED STATES I vE LLswoRTH DAGGETT, or sALT LAKE CITY, UTAH TERRITORY.

|MPRovEMENT IVN MINE-PUMPS. y

Specification forming part of Letters Patent No. 193,227, dated July 17, 1877 application filed May5,1877.5 i i CASE A.

To all 'whom it may concern:

B ef it known' that LELLswoRTH DAGGETT, of :Salt Lake City, in the county of Salt Lake and' Territory of Utah, mining' engineer, have invented certain newV and useful Improvements in Mine-Pumps; and I do hereby deelare that the following specification, taken in connection"V vfv'ith'the drawings furnished and forming a p'art'of the same, is a clear, true, and complete description thereof.

My improvements relates to that class of pumps in which reciprocating pipes are employed.

The main object of my invention is to obviate,'either"wholly 'or to a considerable excalled balance-bobs, (such as are employed in Cornish pumps,) for the purpose of balancing the' weight of the pipe during its lift; and to that end'my invention consists in the combination, with vtheV pump and its pipe, of an auxiliaryV or water-balance chamber, into which a portion of the water contained in the pipe is received during its upward movement,

balance the weight ofthe pipe, vorl balance any desired lesser portion thereof.

' lAnother object of my invention is to eiect an easy and free discharge of water from the reciprocating pipe, andv at the same time, when such is'desirable, to provide for a direct connection with: the topof said pipe, of the pitr'nan', by which it is connected with the operative mechanism and to' these ends my invention further consists of the combination of a stationary'receiving and discharging tank, pro

al longitudinally-reciprocatin'g pipe, through which the water is forced or'lifted and discharged'into the tank.

' To more particularly describe my invention, I willrefer to the" accompanying drawings, in Which- Figures 1 and 2 represent, in vertical sec tion, a pumpembodying the several features sent, in similar sections, modications o'fpumps embodying the water-balance feature of my invention.

In all the figures, A represents the pumpthe other, at proper intervals, provided several pipes, B, areso connected -that all of them will be reciprocated as one pipe, as is described in anotherapplication by me for Letters Patent. '4 f The construction of the pumpbarrel may be largely varied, and although I have herein in this. connection .shown and described certain details in construction which are novel and of value, they constitute no portion of the invention which I at this time desire to claim.

In Fig. 1 the pump-barrel isy shown to be constructed in two parts, vthe lower being of a greater diameter than the upper. The upper portion is shown to be of considerable thickness, as at a,for the reason that in this instance it is desirable'tohave a greater exterior diameter ofthe barrel than would be attained vif the metal were no thicker than would be actually requisite in an ordinary pump-barrel of the same interior diameter.v VThe exterior of this upper portion is turned oif truly.

C denotes one form of an auxiliary chamber, by means of which the water-balance is effected. In Fig. l it is connected, by-means of its dome and lauges, to the lower end of the reciprocating pipe B. It has an interior diameter greater than the exterior diameter of the upper section of the pum'p-barrel, and the sliding joint between them is guarded by a packingbox, as at b.

rIhe valve D is attached to the lower end of the valve-rod c, which, inturn, atits upper end is centrally secured to the interior of the domev of the auxiliary chamber O,in a mauner well known. The usual lower valve is shown at d. 4

E denotes a stationary tank, which is located at the mouth of the lshaft,or at any point below, from which direct drainage is possible. The bottom of the tankl is provided with a stuflng-box for packing with the exterior surface of the pipe B, which is properly turned off and extends upward into the tank. The

pipe B, near its upper end, is vprovided with 1 numerous perforations, as at c, for discharging water laterally into the tank, which is provided with an overow-chute, as at f. The upper end of pipe B is provided with a suitable bale, as at g, with which the pitman is directly connected.

Under some circumstances I prefer that the upper section of pipe B be made of wroughtiron or even low steel; but ordinarily good cast iron may be employed.

In Fig. 1 the pipe B is'shown at the bottom, and in Fig. 2 at the top, of the stroke.A

It wil-l be readily seen that, as the pipe B is lifted, water will be drawn through the lower valve into the pump .barrel; and,'also, that the water in the upper portion ot" the pumpbarrel is lifted by the moving valve. As the auxiliary chamber C is lifted, its cubic capacity is rapidly enlarged, so that only a portion 0f it is filled by the water lifted by the valve, and the remainder of said chamber is filled by Water from the pipe B. In other words, the column of water in pipe B (having its base in a chamber which is enlarged as the pipe rises) induces pressure within the chamber, which, when exerted upon its dome, contributes to the lift of the pipe and lessens the power otherwise requisite to raise it; and it will also be seen, if the chamber be properly proportioned with reference to the pump-barrel, the length of stroke, and the pipe B, that the weight of said pipe may be practically offset or balanced by the column of water within the pipe, and that, therefore, balancebobs,7 as in Cornish pumps, may be wholly obviated, or, if used at all, they may be reduced in weight to any desired degree. As the pipe B descends, the upper valve opens and water passes from the lower portion of the pumpbarrel, the cubic capacity of the auxiliary chamber meantime decreasing, and therefore at each descent of the pipe as much .water is discharged therefrom at its top as is taken into the pump'barrel through its lower valve, which is all that any pump which operates in forcing water only during the downward movement of its piston could discharge.

In connection with the discharge ofthe wa-.

ter from the pipe B, it will be seen that it is delivered freely into the open tank, because the numerousperforations afford an aggregate area of opening much greater than the sectional area of the pipe. As mining-pumps are usually ot' long stroke, it is a matter of consequenceto lessen, as far as is practicable, the

height ot' the column of water above the point' from which lowage may occur, and to discharge it with a minimum of pressure.

As before stated, the pump-barrel may be varied largely in its construction, and the same is true of the auxiliary chamber, and these variations may be employed withoutdeparting from the spirit of my invention.

In Fig. 3 I have illustrated a modication having an auxiliary water-balance chamber,

- C, which is substantially as in Figs. 1 and 2.

The pump-barrel A is in -one piece, mounted on a valve-box. Instead of avalve-rod a tubular piston, t', is employed, which, at the upper end, communicates with the pipe B, but has a greater interior diameter. Atlthe'upper end of piston fi it is provided with numerous perforations, k, which open into the water-balance chamber.

In Fig. 4 the tubular pistoni1 is;fpacked at its lower end, instead of at the upper part of the pump-barrel A', as in Fig. 3. It is also of the samediameter as the pipe B. 'Ihe packing between the pump-barrel and the auxiliary chamber is located at the top of the barrel, instead ofi at the bottom .of .thetchambeg as in Fig. 3.

In Fig. 5 the pump-barrel is of the simplest possible form, and has a tubularpiston, i". In this insta-nce the auxiliary or water-balance chamber G1 is wholly separate, as a structure, from the pumpbarrel. This, chamber is stationary, While those previously described have been attached to, and move `with, the pipe B. The chamber and pump-barrel communicate with each other and with the pipe B by means of a branch pipe at l, which has for one leg the tubular piston 'i2 and the other leg the pipe l', which occupies the water-balance chamber.

In Fig. 6 the pump-barrel is as in Fig.'5, but the stationary water-balance chamberiG is located above, and the pipe B isstraight, extending from the pump upward through la stuffing box in the bottom of said chamber. Said pipe within the chamber is provided with a piston, as at m, and below the piston the pipe is perforated.

'Ihis line of modification could be presented f by me almost indeiinitelyfrom plans which have long been prepared by me and duly approved; but I have shown a suicient number thereofto illustrate, to someextent, how far mere construction may be varied'without maf terially affecting the results sought.

In connection with each form of pump herein shown,it will be seen that as the pipe B is lifted the column of water therein is not lifted, and also that said column contributes,by`its pressure upon the water within'the balancechamber, to lift said pipe, and that, -by due consideration of the several points involved,

a 1 )ractically-per`fect balance of sai'd pipe may be attained in like manner, as pump-rods have been heretofore balanced by balance-hubs, as in the Gornishpump.

The value in a mining-pump of the reciprocating pipe, in lieu of the stationary pipe and `pump-rods, has long been conceded, in that,

if for no other reason, less space is required in a shaft; and it will be` seen that, withmy water-balance improvements, the moving pipes may be employedlwithout the cumbrous balance-bobs heretofore deemed essential in deepmine pumps.

Having thus described my invention, I claim as new and desire to secure by these "Letters Patent- 1. In a mining-pump, the combination, with a reciprocating pipe, a pump-barrel, and suitable valves, of an auxiliary or water-balance its bottom for the passage of the pipe, subchamber, substantially as described, whereby stantially as described. the Weight of the pipe may be wholly or partially balanced, as set forth.

2. In a mining-pump having a reciprocat- Witnesses:

E. E. MGGAMMON, R. A. KEYES.

ELLSWORTH DAGGETT.

ing pipe, the combination, with said pipe, of a discharge-tank provided with a stufIing-box in

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