Improvements in and relating to Steam Pumping Engines.
Year: 1890

page_text: Date of Application, 1st July, 1890-Accepted, 2nd Aug., 1890
COMPLETE SPECIFICATION.
Improvements in and relating to Steam Pumping Engines.
I. JOSEPH L. LOWRY, Engineer, of Ridge Street, Thirteenth Ward, Allegheny
ity, in the County of Allegheny and State of Pennsylvania, United States of America,
o hereby declare the nature of this invention, and in what manner the same is to
e performed, to be particularly described and ascertained in and by the following
tatement:-
My invention relates to steam pumping engines, and has special reference to that
lass of engines in which steam is worked expansively, and the object of the invention
3 to work steam from the highest to the lowest pressure without unnecessary labor
eing performed by the engine.
City, in the County of Allegheny and State of Pennsylvania, United States of America
o hereby declare the nature of this invention, and in what manner the same is to
e performed, to be particularly described and ascertained in and by the following
statement:-
My invention relates to steam pumping engines, and has special 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 invention will be hereinafter described, and particularly pointed
claims.
:-
out in the
In the accompanying drawings which form part of this specification
Figure 1, represents a side elevation of a vertical steam pumping engine embodying
my invention.
Figure 2, a top or plan view of the same.
Figure 3, a side elevation of a blowing engine having my invention applied
ereto.
Figure 4, a top or plan view thereof, and
Figure 5, a perspective of the quadrant detached.
Figure 6, is a plan view, and
Figure 7, an end view of a 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, B, an air vessel which also forms a supporting
column for the rock-shaft C, to which the quadrant lever D, is secured, E, and F,
single acting pumps G, the steam cylinder, H, the pillow-block for the main shaft I,
and its fly-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 O, for the rock-
shaft C.
The pump cylinders E, F, are each thirty inches internal diameter, and eight
feet stroke, and are connected to the quadrant lever 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 inches, and eight
feet stroke, stands at an angle of 67°, 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 lever 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 67°. It will be observed that the rods U, and V, connected respectively to the
steam cylinder 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
centre of the quadrant; and the connecting rods of the two pumps are fitted to the
quadrant four inches to the left of the centre, in order that they may pass each other
when working.
The quadrant lever 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 from the centre of the rock-shaft C.
of the connecting rod V
The wrist-pin c,
"

page_text: is fitted to the arm W, of the quadrant four feet_ten and a half inches from the
wrist pin d, of the connecting rod R of the pump E, and five feet six inches from the
centre of the rock shaft.
The engine being constructed substantially as described, the operation is as
follows:-
Assuming the engine to be in the position shown in Figure 1, the piston in the
steam cylinder in its down stroke will cause the wrist pin a, to descend to the
numeral 1, making a stroke of eight feet, from five feet above a horizontal line to
three feet below it. The piston of the pump F, at the same time descends and causes
the wrist pin b, to travel eight feet, the stroke of the pump; the piston of pump E,
which is connected to the quadrant by the rod R at d, ascends. In the ascent or up
stroke 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 check valve N into the air chamber B. The pump
pistons have each an area of 656 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 65,600
pounds; the piston, piston-rod, connecting-rod and arm of the quadrant weigh at
least 10,000 pounds, making a total of 75,600 pounds raised by this quadrant arm
from a horizontal to a vertical position.
At the
To raise the weight of 75,600 pounds, steam is admitted into the cylinder G, but as
the piston rises the weight diminishes; when the piston has travelled 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 20,500 pounds, leaving a weight 45,100 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
wrist pin b, to wrist pin e, in the lower end of the connecting rod R.
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 centre of the rock-shaft C. The weight of water in
the pump E is now 12,300 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
drawing to pump E, thus giving 10,000 ponnds to balance water in pump E,
which leaves 2,300 pounds for the piston to bring to the end of the stroke. The
area of the piston in the cylinder G, is 1809 square inches and it will require a
pressure of two and a half pounds on each square inch to balance this 2,300
pounds on the piston 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 same principle of construction and operation is equally applicable to other
forms of pumping engines, such as steam fire engines and blowing engines, the latter
is shown in Figures 3 and 4, and in which A' indicates the bed-plate, B₁ supporting-
column and air-chamber. Crock-shaft, D¹ quadrant, E, F blowing cylinder,
G steam cylinder, H' pillow-block, I main shaft, K₁ fly-wheel, L', L', guides,
M', M', cross-heads N', N₁, valve chambers for receiving and discharging air,
O¹ pillow-block for shaft C, P, Q, pump-piston-rods, T¹ engine piston-rod, U con-
necting-rod for the engine, V connecting-rod between fly-wheel shaft and the quadrant,
W and Y arms of the quadrant, a¹, b¹, c¹, d' and e¹ wrist pins.
In Figures 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 upwardly over the steam cylinder and the fly-wheel. B₁ the steam-
cylinder. C, 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.

page_text: It is obvious that pumping engines of various capacities may be constructed upon
the principle shown and described.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed 1 declare that what
I claim is :-
:-
First. In a pumping engine, a pump cylinder and an engine cylinder, in combina-
tion with a quadrant lever, having arms as Y, Y, and arms W, W, between the
wrist-pins in the arms Y, Y, and the axis of the quadrant lever, substantially as
described.
Second. In a pumping engine, a pump cylinder and an engine cylinder, in com-
bination with a quadrant lever having arms as Y, Y, and W, W, in different vertical
planes, and the latter arms located between the wrist pins in the arins Y, Y, and the
axis of the quadrant, substantially as described.
Third. In a pumping or blowing engine, the combination of pump cylinders, an
engine cylinder at an angle to the pump cylinders, a quadrant having arms as Y, Y,
and W, W, rods connecting the pumps to the arms Y, Y, and rods connecting the
engine and a shaft to the arms W, W, substantially as shown and described.
Dated hist
1000
1070
LONG
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.