Improvements in Pumps.
Year: 1893

page_text: Date of Application, 29th July, 1893
Complete Specification Left, 30th Apr., 1894-Accepted, 16th June. 1894
Improvements in Pumps.
I, JOSEPH LIDDELL ANDERSON, and HENRY UPPLEBY WOLLASTON, both
of Gotha Iron Works, Slough, in the County of Bucks, Engineers, do hereby
declare the nature of this invention to be as follows:-
This invention relates to Improvements in Pumps. The object of this invention
is to construct an improved pump which is of a simple and efficient character and
which can be cheaply manufactured. The said improved pump is single-acting, as
far as its suction stroke is concerned, but is double-acting in its delivery; the latter
circumstance renders it particularly advantageous for use in high-pressure hydraulic
work, inasmuch as uniform and practically continuous flow is obtained.
According to this invention, simplicity of construction is secured by making the
various passages for fluid perfectly straight, and preferably of circular cross-
section, and placing or forming valve-seats therein, where required, in suitable
enlargements of the said passages; this is a very important feature of the invention.
All the said passages can, if desired, he bored to exact dimensions. The said
passages are closed, where necessary, by screw-plugs which may be permanent, or,
to allow of the insertion of the valves in the passages, and of access to the interior
of the passages, may be made removable. The outer end of the suction passage
is preferably formed to receive packing and is screw-threaded; a screwed collar is
provided to fit the said threaded portion of the passage; thus a union joint. is
constituted to retain the flanged end of a pipe in fluid-tight connection with the
pump.
The outer end of the delivery passage is preferably similar to that of the suction-
passage.
The valves employed are ordinary non-return valves; their lift is limited by a
stop which projects from a plug screwed into the passages of the pump, in proximity
to each valve.
The pump is provided with a plunger which has a suitably-packed piston secured
thereon; the effective area of the side of the piston at which the plunger enters
is preferably half that of the opposite or suction side of the piston, and the
passages are so arranged that the fluid admitted to the pump goes past a non-return
valve to the suction side of the piston and fills the pump barrel during the out-
stroke of the pump; the contents of the barrel are then forced, during the return
stroke, through another non-return valve, going partly into the space around the
plunger and partly out through a delivery orifice. During the next out stroke the
water previously received, as aforesaid, into the space around the plunger is
discharged through the delivery orifice by a passage which is in direct communi-
cation therewith, and which is not provided with a valve. Thus, although suction
occurs during every alternate stroke only, a delivery of fluid occurs during every
stroke, and this result is obtained without the employment of the combined bucket
and plunger, or complicated arrangement of outside valves pipes and other fittings
usually adopted.
A pump constructed according to this invention may for instance be made with
four parallel straight passages, of cylindrical cross-section, in the body of the same.
Two of the said passages pass right through the body of the pump; a suction
channel branches from one of the said two passages, and a delivery channel from
the other, which other is connected, by a cross passage in line with the delivery
chaunel, with the interior of the pump barrel hereinafter referred to.
The upper

page_text: ends of both of the said two passages are each closed by a packed screw-plug with
a stop projecting therefrom, and each passage has a non-return valve therein, near
to the plug, and seated, when closed, upon a conical seating formed in the passage
by an enlargement of its diameter. The lower ends of the said two passages are
closed by ordinary screw plugs. The valve near the suction channel is placed
above the point of entry of the said channel into the aforesaid passage. The valve
near the delivery channel is placed below the point of entry of the said channel
into the corresponding passage.
Of the two of the aforesaid parallel passages that do not pass right through the
pump body, one forms the pump barrel; the other, of smaller diameter, is connected
at its upper end with the space above the valve situated as aforesaid, near the
suction channel, and is plugged at its lower end, where, just above the plug it is
connected by a cross passage with the lower part of the interior of the pump
barrel, and also with the lower end of the passage at one side of which the delivery
orifice is formed. The said cross channels, which pass into the pump body at one
side thereof are plugged where they enter the same. The pump barrel is busbed
at its upper end and provided with a stuffing-box and with a plunger and piston of
the kind herein before referred to.
The aforesaid pump, by reason of the continuity of flow therefrom can be
employed to deliver water under pressure direct to hydraulic machinery, without
the intervention of accumulators; a still more satisfactory result is obtained if a
pair of such pumps be employed so that the delivery strokes of the two pumps
alternate.
The pump can be worked either in a vertical or horizontal position by suitably
arranging the valves and passages.
Dated this 20th day of July 1893
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.
Improvements in Pumps.
We, JOSEPH LIDDELL ANDERSON, and HENRY UPPLEBY WOLLASTON,
both of Gotha Iron Works, Slough, in the County of Bucks, Engineers, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
This invention relates to Improvements in Pumps. The object of this invention
is to construct an improved pump which is of a simple and efficient character and
which can be cheaply manufactured. The said improved pump is single acting, as
far as its suction stroke is concerned, but is double acting in its delivery without
the intervention of an accumulator or air vessel; the latter circumstance renders it
particularly advantageous for use in high pressure hydraulic work inasmuch as
uniform and practically continuous How is obtained.
According to this invention simplicity of construction is secured by making the
various passages for fluid perfectly straight and preferably of circular cross-section,
and placing or forming valve-seats therein, where required, in suitable enlarge-
ments of the said passages; this is an important feature of the invention.
said passages can if desired, be bored to exact dimension..
In the accompanying drawings which illustrate our invention.
Figure 1 is a side elevation of one form of pump.
Figure 2 is a plan, and
Figure 3 is a central longitudinal section of the same.
All the
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page_text: gure is an end elevation, and
Figure 6 is a plan of a slightly modified form of the pump.
Figure 7 is a central longitudinal section of the same.
Figure 8 is a section taken on the line A, B Figure 7, and
Figure 9 is a section taken on the line C, D of said figure.
Like letters denote corresponding parts throughout the drawings.
a is the pump barrel, b is the piston which is suitably packed, c is the piston rod,.
d is the suction valve, e is the delivery valve for the fluid passing from below the-
piston, is the suction pipe, g is the delivery pipe.
The passages are bored out and are closed, where necessary, by screw-plugs.
which may be permanent or, to allow of the insertion of the valves in the passages,
and of access to the interior of the passages, may be made removable. The outer
end of the suction passage his preferably formed to receive packing and is screw
threaded; a screw threaded collar i is provided to fit the said threaded portion of
the passage; thus a union joint is constituted to retain the flanged end of the suction.
pipe fin fluid-tight connection with the pump.
The outer end of the delivery passage is preferably constructed similar to that
of the suction-passage.
The valves employed are ordinary non-return or check valves; their lift is
limited by stops which project from plugs screwed into the passages of the pump,.
in proximity to each valve, or otherwise.
The sectional area of the piston rod or plunger c is preferably about half that of
the piston, consequently the effective area of one side of the piston is about half
that of the opposite or suction side of the piston. k is a port forming a communi-
cation between the upper end of the cylinder and the delivery passage j at a point
above the valve e. By reason of this port a portion of the water which passes
the valve e during the down stroke of the piston enters the pump barrel above the
piston, and this liquid is only finally discharged during the return stroke of the
piston. The delivery pipe may or may not be furnished with a check valve..
Although suction occurs during every alternate stroke only, a delivery of liquid
occurs during every stroke, and this result is obtained without the employment of
the combined bucket and plunger, or complicated arrangement of outside valves,.
pipes and other fittings usually adopted for this purpose.
and
Figures 4 to 9 show a modified pump constructed according to this invention
which has four parallel straight passages, namely the pump barrel and the
passages, and of cylindrical cross-section, in the body of the same.
channel branches from the passage and a delivery channel from the passage j
A suction
which said passage is connected, by a passage or port in line with the delivery
pipe g
with the interior of the pump barrel. The upper ends of the passages h
jare each closed by a packed screw-plug having a stop projecting therefrom,
and the said passages are furnished respectively with non-return valves d, e just
below the plugs, and seated, when closed, upon conical seatings formed in the
passages by an enlargement of the diameters thereof. The lower ends of the
passages are permanently closed. The valve is placed above the level of
the suction pipe fand the valve e is placed below the level of the delivery pipe g.
The passage i of smaller diameter than the pump barrel is connected at its upper
end with the space above the valve d, and is plugged at its lower end, where, just
above the plug it is connected by a cross passage m with the lower part of the
interior of the pump barrel, and also with the lower end of the passage j. The
said cross channel m is plugged at its ends. The pump barrel is bushed at its
apper end and provided with a stuffing-box o and with a plunger and piston of the
kind hereinbefore referred to.
The aforesaid pump, by reason of the continuity of flow therefrom can be
mployed to deliver water under pressure direct to hydraulic machinery, without
he intervention of accumulators; a still more satisfactory result obtained if a
air of such pumps be employed so that the delivery strokes of the two pumps.
lternate.

page_text: The pump can be worked either in a vertical or horizontal position by suitably
arranging the valves and passages. The valves may be placed in any convenient
positions other than those shown.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. A pump constructed so as to be single acting with regard to its suction but
double acting with regard to its delivery, substantially as described.
2. A pump constructed substantially as described with reference to Figures 1
to 3 or to Figures 4 to 9.
Dated this 30th day of April 1894.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.