IMPROVEMENTS IN DOUBLE ACTING PUMPS
Year: 1884

page_text: DE MOITATION.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Win. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
DOUBLE ACTING PUMPS a communication to me from abroad by Janes McGwin of
Fulton in the County of Callaway and State of Missouri, United States of America,
to be as follows:-
"
This invention relates to a double acting pump suitable for artesian and other
deep wells.
The pump is constructed with an inner and an outer cylinder, the inner one
containing a piston, whose rod is packed in the top of the cylinder, and extends
through a neck to which the stand pipe would be secured.
The piston rod has a series of packing collars fitting closely in a tube which
extends from the top or cover of the inner cylinder, and is flared outward slightly
at the top and bottom. In the cover there are a series of apertures arranged in a
circle, and closed by an annular valve plate which is fitted on the top of the
cylinder. This valve plate is furnished with a central collar surrounded by a
spring, the upper end of which rests against a cross piece held in the upper part of
a cap attached to the outer cylinder. This cap is contracted towards its upper end
to form the neck, to which the lower end of the stand pipe may be secured as above
mentioned.
Between the inner and outer cylinders are two radial partitions, which form a
vertical channel or passage cominunicating at the upper end with a chamber at the
top of the cylinders and at the lower end with one of three tubes which are secured
to the lower end of the cylinders. One of said tubes is in communication with
the tail pipe and the lower end of the inner oylinder, the second with the tail pipe
and the outer cylinder and, by means of an opening in the inner cylinder, with the
Baid cylinder above the piston, and the third as above mentioned with a chamber
above the cylinder.
A casing open at the bottom is secured to the lower end of the outer cylinder,
and encloses these tubes

page_text: The tubes are each furnished with a ball valve which rest on seats of smaller
diameter than the tubes. One of said seats is provided with an opening registering
with the lower end of a duct, which leads from the lower end of the inner cylinder
to the tube which communicates with the channel between the two cylinders.
The operation is as follows:-
When the piston ascends, water is drawn into the bottom of the inner cylinder,
and the water above the piston is forced out through the apertures in the cover
plate, into the chamber above, the valve being raised by the pressure. When the
piston descends water is drawn into the upper part of the inner cylinder through
the tube which.communicates with the outer cylinder, and the opening in the inner
cylinder and the water below the piston is forced out through the duct and the
channel between the cylinders into the chamber above from whence the water rises
into the stand pipe.
If desired, the pump can be inserted into the tube of an artesian well and in that
caso no stand pipe need be secured to the top.

page_text: COMPLETE SPECIFICATION.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN DOUBLE ACTING PUMPS,” (a communication to me from abroad by James McGwin
of Fulton Callaway County, State of Missouri, United States of America) and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The object of this invention is to provide a new and improved double acting
pump for artesian and other deep wells.
The invention consists in a double acting pump constructed with an inner and
outer cylinder, the inner one containing a piston, secured to a piston rod packed in
the top of the cylinder. To the bottom of the cylinder, three tubes each containing
a valve are secured, one of said tubes being in communication with the inner
cylinder, the second with the outer cylinder and the third with a vertical channel
between the two cylinders. A duct connects the inner cylinder with the tube in
communication with the vertical channel between the two cylinders.
Reference is to be had to the accompanying drawings forming part of this
specification in which similar letters of reference indicate corresponding parts, in all
the figures.
Figure 1 is a longitudinal sectional elevation of the improved double acting
pump.
Figure 2 is a sectional plan view of the same on the line x, x, Figure 1.
Figure 3 is a sectional plan view of the same, on the line y, y, Figure 1.
Figure 4 is a longitudinal sectional view of the bottom part on the lines, s,
Figure 3.
The piston A working in a cylinder B is secured to a piston rod C which is
provided with a series of packing collars D fitting closely in a tube E formed on
the top F of the cylinder, which tube is flared outward slightly at the top and
bottom. The top F is provided with a series of apertures a arranged in a circle.
An annular valve plate G, rests on the top F, and is provided with a central
collar G surrounded by a spring H, the upper end of which rests against a cross
piece J, held in the upper part of a cap K which is contracted toward its upper end
and provided with a neck K' to which the lower end of the stand pipe is secured.
The cylinder B is surrounded by a larger cylinder L, on the upper end of which
outer cylinder L the cap K is screwed. The opening g establishes communication
between the upper part of the cylinder B and a channel M³ between said cylinder
and cylinder L Two vertical radial partitions M form the channels A¹ M³ at the
upper end of the former of which thero is an opening h. Three tubes N' N2 N³ are
secured to the bottoms of the cylinders B and L, each containing a ball valve O
resting on seats l. These seats are tubular and of smaller diameter than the tubes,
in order that they may fit within the same, and said seats are formed on a base l.
One of said seats is provided with an opening registering with the lower end of
duct P as shown. The upper end of the tube N' communicates with the bottom

page_text: of the channel M. The tube'N' communicates with the channel M³. The tube N³
communicates with the bottom of the cylinder B. The duct P extends from the
bottom of the cylinder B to the bottom of the tube N¹. Q is a cap open at the
bottom and screwed on the lower end of the cylinder L so as to surround
the tubes N¹ Nº N³.
The operation is as follows:
When the piston A ascends, water-is drawn into the bottom of the cylinder B,
through the tube N³ the corresponding valve O being raised, and the water above
the piston is forced out through the apertures a into the chamber cap K, the valve G
being raised by the pressure. When the piston A descends, the water is drawn into
the upper part of the cylinder B through the tube N³, channel M² and the
opening g. The water below the piston is forced out through the duct P, the
tube N, the channel M' and into the cap K. The water rises from the cap K into
the stand pipe secured to the neck K¹, the rod C working up and down in the
stand pipe.
If desired the pump can be inserted into the tube of an artesian well and in that
case no stand pipe need be secured to the top of the cap K.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is
:
1st The two cylinders B, L, the partitions M, M forming channels M¹, M³ con-
necting with the piston cylinder and the chamber above said cylinder respectively,
tubes N N N provided with valves and communicating with the said channels
and piston cylinder as shown, and duct P in combination with the top F having
apertures a, the spring pressed annular valve G, and the piston A, C, all arranged
substantially as shown and for the purpose set forth.
2nd The combination of the piston cylinder B, and the piston A, C, with the
apertured cap F, tube E, annular valve Ġ, spring H, and cross bar J, substantially
as set forth.
3rd The combination in a double acting pump, of the tubes N¹ N' N³ and duct P,
with the tubular seats L, formed on a base and of smaller diameter than said
tubes; one of the seats being provided with an opening 1 registering with the
duct as shown and described.