US306679A - Self and w - Google Patents

Description

PUMP.

Patented o@t.'14, 1884.

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(No' Model.)

J. W. DOUGLAS.

N. PETERS. Plwxovumngnpner. wnmgwn, D. c.

` Unir-rn rrares JOSEPH XV. DOUGLAS, OF MIDDLETOVN, CONNECTICUT, ASSGNOR TOHIM- SELF AND XV. AND B. DOUGLAS, OF SAME PLACE.

PUMP.

.SPECIFICATOI forming part of Letters Patent No. 306,679, dated October 14, 1884.

Application filed September' 5, 1383.

To all whom, it may concern,.-

Be it known that l, JosEri-r W. DOUGLAS, a citizen of the United States, residing at Middletown, in the county of Middlesex and State of Connecticut, have invented new and useful Improvements in Pumps, of which the following is a specification.

My invention relates to force-pumps, and has for its object to simplify and cheapen the construction of the saine, and to provide a double-acting force-pump which shall possess great strength 'and durability, and in which danger of leakage from imperfect joints is obvviated.

To this end, therefore, my invention consists in a pump having two working-cylinders, one above the other, and each having a piston carried by the same rod, the upper cylinder being surrounded by an air-chamber, and having two eduction-ports, the whole being cast in a single piece, whereby great strength and durability are secured and danger of leakage from imperfect joints is avoided, while the cost of manufacture is at the same time reduced to a minimum.

Referring to the drawings forming part of this specication, Figure l represents a central vertical section of the pump-cylinder and air-chamber surrounding it, and Fig. 2 is a side elevation showing the pump with its operating parts.

A in said drawings represents a suctionpipe leading from the well or other watersource. Upon the end of this pipe is mounted a cylinder, B, the entrance to which is covered by an upwardly-opening elack-valve, a.

W'ithin the cylinder B reciprocates a piston-head, C, having a puppet-valve, c, which opens as the piston descends and allows the water in the cylinder B to iiow in above said piston. The latter is mounted upon a pistonrod, D, which is reciprocated by a pump-handle in t-he usual manner.

Above the chamber B, and concentric there-I with, is formed a second working-cylinder, E, of less diameter, havinglits lower end open. NVithin this cylinder reclprocates a piston, d, mounted upon the rod D; and operated thereby.

F indicates an air-chamber surrounding the (No model.)

tapped pipes f/ g, which may unite above in a single discharge-tube.

The part-s composing the lower cylinder, the upper cylinder, the air-chamber surrounding the latter, and the eduction-ports are all cast in a single piece, whereby greater strength is 6o obtained, all joints are avoided, and the cost of production is materially decreased.

lt is well known that in force-pumps where the water is under heavy pressure in the working-cylinders there is constant danger of leakage through the joints, and frequent attention and renewal of the packing between the joints is necessary. My invention obviates these difficulties, besides securing other advantages.

The operi tion of the device is clear from 7o the drawings. As the piston C moves downward, the elack-valve a closes, the puppetvalve@ in the piston opens, and water flows in above it. At the same time the descent of the piston d in the upper chamber, D, drives the water out of the latter through the educ- VJtion-ports r/ g. As the piston C rises, the valve c closes and the water above it is driven out through the discharge-pipes, while at the same time the chamberB is filled, through the valve So a, by water flowing from the suction-pipe A. ln this manner the forcing mechanism acts `upon both the up and the down stroke, giving a continuous stream through the dischargepipe.

In Eio'. 2 of the drawings l have shown the attachments belonging to the parts hereinbefore described. In this gure l designates the base which forms a portion of the cover for the well, and upon which is placed the tubular upright I. The discharge-pipes ,f/ g pass upward through openings in this base-piece, and lie upon each side of the tubular upright I', being coupled thereto by an adjustable bridge-piece, L, which encireles all three and is supported by abrace-rod, L, the lower end of which rests upon the base-piece I, or upon the parts surrounding the same. lt will be seen that by making the bridge-piece L adjustable upon the tubular upright and pipes the former IOO may he adjusted to any point'l within ce1-tain 1:11' uplighblf, thedisehalfge-pipeSf/,tlmbridgelimits, as may be required by the depth ofthe I piece L, adjustable ou the pipes and tubular oistern or other eiic-unistauees. upright, and a brace-rod, L', connecting the 15 Havingthusdeseribedmy i11ve1xtio11,\vhat l bl'idge-pieee with the base, substantially as claim sdescribed.

il.. A force-pump having` two pulnp-eylinl In testimony wheieoflhave hereunto Set my ders, 011e above the other, the upper cylinder i hand in the presence of two subscribing Witbeing east integral with a Surrounding aiimesses.

chamber, and a discharge-port at one side of JOSEPH W'. DOUGLAS. 1 o the ai rehan1he1', Substantially as shown and de- Witnesses:

scribed. JOHN N. CAMP,

2. The combination of the hase I, the tubu- Ginollzoi. A. Gm re.

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