US478314A

US478314A - Hydraulic pumping-engine

Info

Publication number: US478314A
Authority: US
Publication date: 1892-07-05
Anticipated expiration: 1909-07-05

Description

(No Model.) v

G. W. DAWSON. HYDRAULIC PUMPING ENGINE.

Wilma/of@ UNITED STATES GEORGE W. DAWSON,

i PATENT OFFICE.

OE CHICAGO, ILLINOIS.

HYDRAULIC PUMPIYNGENGINE.

SPECIFICATION forming part of Letters Patent No. 478,314, dated July 5, 1892. Application filed September 19, 1891. Serial llo. 406,170. (No model.)

To @ZZ whom it may concern:

Be it known that I, GEORGE W. DAWSON, a citizen of the United States, residing at Chicago, In the county of Cook and State of Illinels, have4 invented a new and useful Hydraulic Pumping-Engine, of which the following is a specification.

My invention relates to pumps which are Operated by the pressure of water; and my objects are to provide a system of valves for both pump and engine cylinders which are durable and simple and have a positive noiseless movement for operating them, thus adapt- Ing the engine to use in private residences or any other situation where a noiseless machine of this kind is necessary.

Another object is to so` construct a pumping-engine that it will be adapted to raise the pressure of the water in the supply-pipes of a h ouse to a higher pressure than the supply which operates the engine, thusiadapting it to .supply the upper stories of very high build- Ings In places where the ordinary water-works pressure is not suflicient to attain this result.

These objects are attained by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a front side elevation of a pumpingengine embodying my improvements. Fig. 2 is aleft-haud end elevation of Fig. 1. Fig. 3 is a rear side elevation of Fig. 1 with part of the pump and engine-cylinders broken away. This view is to show details of the valve-operating mechanism. Fig. 4 are respectively side and top views ofthe rear valve-operatin g lever; Fig. 5, respectively side and top views of front valve-operating lever. Fig. 6 are respectively top and end views of a clutch-collar which operates a lever and will be explained in connection therewith. Fig. 7 is a longitudinal section on a horizontal plane of Fig. 1 on line a b, the pistons and rods together with the valves and their levers being shown in elevation. Fig 8 shows valve in position for admitting water to one end of the engine or pump cylinder and also shows position by which water can escape from opposite end of cylinder. Fig. 9 shows valve in reverse position from that shown in Fig. 8. Both Figs. 8 and 9 are sections of the valve and valveseat transversely of the valve in order to show the relation ofI passages in the valve with thosein the seat.

Similar letters refer to like parts throughout the several views.

A is the foundation-frame of the machine, to which at each end are secured the ends of cylinders B and C. There are two A-shaped frames D and E, having their feet attached to the ends 0f frame A, as shown. The apex of frames D and E forms bearings for a transverse shaft c, and at each end of shaft c is a lever, lever F being firmly secured to the shaft, while lever G is loosely mounted thereon. At one end ofthe hub d of lever G, Figs. 2 and 5, is notch e, in which operates a projection f of collar H, which collar is firmly secured to shaft c, Figs. 2 and 6. The jection fis narrower than the width of notch e for the purpose of allowing shaft c, with collar H, to have a greater amount of motion than is necessary for the hub of lever G, as will be more fully shown.

At the top of rear frame D is an upwardlyprojecting lugg, which has a side portion h Overhanging lever F near its center of length. This portion h has two faces t' and j, which stand at an angle of about thirty 'degrees to -a horizontal line. Set into the top face of lever F are two cylinders of rubber la and k, which alternately contactwith the faces i and j and act as stops, as will be shown. At each end of lever F is a downwardly-projecting lug serving for the attachment of the ends of a rod I, and sliding upon this rod is a ring l', and the ring is attached to the top end of a Spring J, the lower end of which is attached to the foundation of the machine. Secured rmly to shaft c between framesD and E are arms K and K', and rmly secured to the piston-rod L of the machine is'an upwardly-projecting arm L', which is held in a vertical position laterally by a rod-guide L, which passes through its center of length, as shown. Arm L has a rounded top l, which has a position between the lower ends of arms K and K.

As before stated, lever Gis loosely mounted upon shaft c, but its motion is limited. Lever G is confined from movement longitudinally with shaft c, but can have a limited rotary pro- Inovement. At the ends of lever G are pivoted the upper ends of rods M and M the lower ends being pivoted to the outer ends of levers N and N', the inner ends of these levers being firmly secured to the outer end of the valve-stems of valves O and O'. Valves O and O' are of the rotary four-way variety and each has a special caseP in which to operate, the cases each being provided with four openings for the attachment of pipe, as 1o shown in Figs. S and 9. The upper or supply pipes Q and R, Figs. l, 2, 8, and 9, are both connected to one pipe S, which is coniiccted with some source of water-supply.

Pipes T and T connects the valve with the` i5 one end of cylinders B and C, Fig. 7, and pipes U and U' connect the valves with the in end of the cylinders. Pipes V and V form exit passage-ways for the water from the cylinders through the valves. Pistons lV and 2o W are attached tothe ends of rod .L and are provided with the usual packing.

lt will be understood that this pumping-engine is more particularly intended for increasing the pressure for house use above that usually attained by the water-works of cities in their street mains.

In using this system ot' pumping-engines even when cylinders B and C are the same diameter the pressure in the house-pipes can 3o be nearly doubled what it is when connected directly with the street-mains. Any amount of pressure necessary for ordinary purposes iii the house-inains can be attained by this system by making the pump-cylinder smaller than that of the engine or driving cylinder.

In `operation water under pressure is admitted to valves O and O from pipe S through vertical pipes Q and R. Then the several parts of the rmachine have the position shown 4o in Fig. l, both valves O and O have the position shown in Fig. S, whereby water under pressure passes from the pipes Q and R down through one of the passages in the valve and out into the riglit-liand pipe U or T. (Shown by arrow.) As shown in the section Fig. 7 the pressure of the Water causes pistons WV and XV to move from right to left until the rounded end of arm L of piston-rod L strikes against the downwardly-projecting 5o lever K, Fig. l, which will cause the shaft c to slowly revolve and carry lever F to ahorizontal position,wlien by the pressure of spring J ring I is slid along rod I to near its middle of length, but a continuation of the revolution of shaft c causes it to carry lever F beyoud a horizontal position, when ring I by the pressure ot spring J is suddenly slid to the opposite end of rod I from where the ring started and as suddenly accelerate the revolution ot 6o shaft c until lever F reaches an angle from the horizontal similar to that shown in Figs. l and El, when itis stopped from further movement by the rubber buters 7c or la contacting with one of the faces t or j of upward projection h.

Since collar l-I is firmly attached to shaft c, its projection f, Figs. 2 and 6, contacts with one side of notch e of hub d of lever G, and cause this lever to also assume a positionat an angie to the horizontal, as shown in Figs. ,l and 3, and lever G,`liaving rods M and M connecting it with the valve-levers N an d N so that the valves are rotated to the position required only at the termination or near'tlie termination of the stroke of the pistons. lhe collar ll operates lever G only after shaft c has begun and attained about one-halt of its partial revolution. The proj ectiou f of collar H. is so much narrower than the width of notch e in the hub of lever G that lever F is carried by the action of the piston in revolving shaft c until it is to a horizontal position, so that the valves are reallyli changed very suddenly in their position by the action of the spring J, causing the ring I to slide from the center of the length of rod I to tlie.extreme end of said rod and causing the action of the spring J to suddenly rotate shaft c more rapidly than could be done `by the contact of the top endo:` arm L of piston-rod L with either of the levers K or K.

In using this pumping-enginefor increasing the pressure in house-mains, when it receives its supply of Water from the streetniains, we will assume that 4in Figs. l and 7 the right-liand cylinder is the pump and the lef t-hand cylinder is the engine or power end. By the action of the mechanism, as hereiribefore described, the valves are so operated at the termination of the stroke `of the pistons ot' `both pump and engine cylinders th at water is alternately `admitted from pipe S to the end of the cylinders. In the power-cylinder pipe V is for carrying oft the waste water from the lower side of the valve O, while pipe V of cylinder C is connected to the house-inains. It the pressure in pipe S, which is connected with the street-mains, is fifty pounds to the square inch, the piston in the left-haud cylinder B will be reciprocated under a pressure of about fifty pounds to the square inch. Piston "W is connected with piston W by means of rod L, and water admitted to one side of this piston from pipe S will also drive it along the bore of the cylinder with a force of iifty pounds to the square inch, while water at the opposite side of this piston will be compressed with a force equal to the combined pressure of the entering water from pipe S upon the ends of both pistons W' andW, since the water is allowed to go to waste in the end of cylinder B opposite to the `one in which water is being admitted underpressure from pipe S. Thus a pressure equal to double that which is furnished by the streetmains can be attained with pump and engine cylinder of the same capacity.

The rotary four-way valves employed and the means for operating them are perfectly noiseless, and the valves being changedin position when thepistons have almost stopped at the end of `their stroke there is no water hammering even when the machine is -run at as great a speed as will be necessary when doing its full duty.

IOO

IIO

- What I claim as my invention, and desire to secure by Letters Patent, is-

1. A hydraulic pumping-engine consisting of two cylinders B and C, said cylinders connected longitudinally by means of a frame A, said cylinders having pistons WV and W', said pistons directly connected by a rod L, said rod having an upwardly-projecting arm L', Shaft c, mounted above and transversely of said rod, rmly secured tosaid shaft, tWo arms K and K', said arms having a" position in which they can be moved by Contact of the end Zot' arm L' when said arm is reciprocated, as described, by piston-rod L, lever F, firmly attached to shaft c, said lever provided With a rod I, suspended below and attached to said lever only at its ends, said rod having a ring I', which is capa ble ot' sliding the Whole length of said rod bet-Ween the points of attachment of said rod, said ring having attached thereto a spring J, said spring operating in the manner and for the purpose described, the Whole operating in combination with lever G, loosely mounted on shaft c, said'lever .operated by l contact of tongue f of collar H in notch e of the hub of lever G, said lever connected with the valve-levers N and N' by rodslVI and M' for the purpose of imparting a partial rotary motion to each valve at the time andin the manner substantially as shown and described.

2. In a hydraulic pumping-engine, means for operating the valves which control the Water `to and from the machine, consisting of a transverse shaft c, lever F, attached at one end of said shaft and provided with the described rod` I, upon which reciprocates ring I' of spring J in the manner and for the purpose described, and collar H, firmly secured to said shaft and capable of operating lever Gby the means, at the time and for the purpose, sub- 4o stantially as shown and described.

GEORGE W. DAWSON.k

Witnesses S. LA ING WILLIAMS, FERDINAND L. BARNETT.