US431371A - Steam pumping-engine - Google Patents

Description

5 eeeeeeeeeeee 1. J. L. LOWR STEAM PUMPING E E.

No, 431.371 Patented July 1, 1890.

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STEAM PUMPING ENGINE.

No. 431,371. Patented July 1,1890.

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STEAM PUMPING ENGINE. I No. 431,371. Patented'Ju'ly 1,1890.

(No Model.)

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Patented July 1, 1890.

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JOSEPH L. LOVVRY, OF PITTSBURG, PENNSYLVANIA.

STEAM PUMPING-ENGINE.

SPECIFICATION forming part of Letters Patent No. 431,371, dated July 1, 1890. Application filed February 17, 1890. Serial No. 340,757. (No model.)

To aZZ whom it may concern.- 7

Be it known that I, JOSEPH L. LOWRY, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Steam Pumping-Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to steam pumping-em gines, and has especial reference to that class of engines in which steam is worked expansively; and the object of the invention is to work steam from the highest to the lowest pressure without unnecessary labor being performed by the engine.

The class of engines to which reference is made is shown in my former patents, No. 75,284, bearing date of March 10, 1878; No. 298,596, May 13, 188i, and No. 350,755, October 12, 1886.

The invention will be hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, which form part of this specification, Figure 1 represents a side elevation of a vertical steam pumpingengine embodying my invention; Fig. 2, a top or plan view of the same; Fig. 3, aside elevation of a blowing-engine having my invention applied thereto; Fig. 4, a top or plan View thereof; Fig. 5, a perspective of the quadrant detached. Fig. 6 is a plan view, and Fig.7 an end View, of a steam fire-engine embodying my invention.

Reference being had to the drawings and the letters thereon, A indicates the bed-plate on which the engine is supported; 13, an airvessehwhich also forms a supporting-column for the rock-shaft C, to which the quadrant D is secured; E and F, single-acting pumps; G, the steam-cylinder; H the pillow-block for the main shaft I and its fiy-Wheel K, all of which are secured to the bed-plate A.

In the preferred construction the air-vessel B is four feet in its internal diameter and thirty-two feet high, and to the air vessel or column are attached the guides L L for the cross-heads M M of the pumps E and F and check-valves N for said pumps, and on the upper end of the column is a pillow-block or bearing 0 for the rock-shaft O.

The pump-cylinders E F are each thirty inches internal diameter and eight feet stroke, and are connected to the quadrant D by means of the piston-rods P Q, each about twelve feet long, and connecting-rods R S, each twenty feet long. The steam-cylinder G has an internal diameter of forty-eight inch s and eight feet stroke, stands at an angle of sixty-seven degrees, and is connected to the quadrant D by means of the piston-rod T, about twelve feet long, and the connecting-rod U, seventeen feet long.

The fly-wheel K is connected to the quadrant D by means of a rod V, twenty-nine feet six inches long, and when at the end of a stroke it stands at an angle of sixty-seven degrees. It will be observed that the rods U and V, connected, respectively, to the steamcylinder and the fly-wheel, are attached to the arms W of the quadrant between the rock-shaft and the ends of the arms Y, and are four inches to the right of the center of the quadrant, and the connecting-rods of the two pumps are fitted to the quadrant four inches to the left of the center, in order that they may pass each other when working. The quadrant is one-fourth of a circle of sixteen feet, the arms Y each being eight feet long, and when working they rise from a horizontal to a vertical position alternately.

The wrist-pin a of the steam-cylinder connecting-rod is four feet three inches from the wrist-pin b of the connecting-rod s of the pump F and five feet three inches fromthe center of the rock-shaft C. The wrist-pin c of the connecting-rod V is fitted to the arm IV of the quadrant four feet ten inches and a half from the wrist-pin (Z of the connecting rod R of the pump E and five feet six inches from the center of the rock-shaft.

The engine being constructed substantially as described, the operation is as follows: As-

suming the engine to be in the position shown line to three feet below it. The piston of the pump F at the same time descends and causes of the pump. The piston of the pump E, which is connected to the quadrant by rod R at d, descends.

the wrist-pin Z) to travel eight feet, the stroke In the descent or upstroke of this piston the arm Y and wrist-pin d are moved from a horizontal to a vertical position, giving a stroke to the pump of eight feet, the pump F in the descent of its piston being filled. Pump E in the ascent of its piston discharges the contents of its cylinder through checkvalve N into the air-chamber B. The pumppistons have each an area of six hundred and fifty-six square inches after deducting the area of the piston-rod. The water in pump E exerts a pressure of one hundred pounds to the square inch. Therefore the arm Y, to which rod R is attached, raises a Weight of sixty-five thousand six hundred pounds; the piston, piston-rod, connecting-rod, and arm of the quadrant weighing at least ten thousand pounds, making a total of seventy-five thousand six hundred pounds raised by this quadrant arm from a horizontal to a vertical position. To raise the weight of seventy-five thousand six hundred pounds, steam is admitted into the cylinder G; but as the piston rises the weight diminishes. When the piston has traveled five feet and eight inches, the weight of the quadrant, connecting-rod, piston-rod, and piston is removed by being balanced by the counterparts of the other pump and the weight of water has been reduced twenty thousand five hundred pounds,

' leaving a weight of forty-five thousand one hundred pounds of Water on the pump. This reduction of weight is caused by the arm of the quadrant to which the pump is attached, being shortened two and a half feet. The wrist-pin d is drawn to a point two and a half feet from a line supposed to be drawn from the wrist-pin b to wrist-pin c in the lower end of the connecting-rod B. At the end of the stroke the rod has been drawn a total of six and a half feet, and is one and a half feet from the center of the rock shaft C. The weight of water in the pump E is now twelve thousand three hundred pounds. The quadrant in the meantime turns over to the pump F and takes the same position with relation to it as is shown in the drawings to pump E, thus giving ten thousand pounds to balance water in pump E, which leaves two thousand three hundred pounds for the piston to bring to the end of the stroke. The area of the'piston in the cylinder G is eighteen hundred and nine square inches, and it will require a pressure of two and a half pounds on each square inch to balance this two thousand three hundred pounds on thepiston in pump-E; but at the beginning of the stroke it required a pressure (to balance) of eighty-three and a half pounds, or an additional six and a half pounds, making a total of ninety pounds to work it.

The main differences between the engine patented to me October 12, 1886, No. 350,755, and that herein shown and described are: In the former for a vertical engine it required six connecting-rods with working-beam, two

quadrants,- and shaft for a horizontal engine. For a horizontal engine it required five connecting-rods and five cranks with corresponding bearings. In the present construction there are only four connecting-rods-two for the pumps, one for the steam-cylinder, and one for the fly-wheel shaft, and one quadrant.

The same principle of construction and operation is equally applicable to other forms of pumping engines, such as steam fireengines and blowing-engines. The latter is shown in Figs. 3 and 4c, in which A indicates the bed-plate; B, supporting-column and airchamber; C, rock-shaft; D, quadrant; E F, blowing-cylinders; G, steam-cylinder; H, pillow-block; 1', main shaft; K, fly-wheel; L L, guides; M M, cross-heads; N N, valvechambers for receiving and discharging, air; 0, pillow-block for shaft 0; P Q, pump piston-rods; R S connecting-rods; T, engine piston-rod; U, connecting-rod for the engine; V, connecting-rod between fly-wheel shaft and the quadrant; WV and Y, arms of the quadrant; a, b, 0', cl, and e, wrist-pins.

In Figs. 6 and 7 are shown the application of my invention to a steam fire-engine, and in said figures A indicates the frame of the engine, the side bars of which are bent npward over the steam-cylinder and the flywheel; ]3, the steam -cylinder; 0' D, the pump-cylinders; E, the air-vessel; F the vacuum-vessel, and G the quadrant. The remaining portions of the construction being common to this class of pumping-engines and the two hereinbefore described, require no further elucidation.

It is obvious that pumping-engines of various capacitiescan be constructed upon the principle shown and described.

Having thus fully described my invention, what I claim is 1. In a pumping-engine, a pump-cylinder and an enginecylinder, in combination with a quadrant-lever having arms, as Y Y, and arms W IV between the wrist-pins in the arms Y Y and the axis of the quadrant-lever, substantially as described.

2. In a pumping-engine, a pump-cylinder and an engine-cylinder, in combination with a quadrant-lever having arms, as Y Y and W W, in different planes, andthe latter arms located between the wrist-pins in the arm Y Y and the axis of the quadrant, substantially as described.

In a pumping or blowing engine, the combination of pump-cylinders, an enginecylinder at an angle to the pump-cylinders, a quadrant having arms, as Y Y and WV W, rods connecting the pumps to the arms Y Y, and rods connecting the engine and a shaft to the arms WV W, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

J OSEPl-I L. LOWVRY.

Witnesses: c

; HILARY B. BRUNOT, J. M. SHIELDS.

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