Year: 1887

page_text: Date of Application, 3rd Sept., 1887
Complete Left, 4th June, 1888
Complete Accepted, 6th July, 1888
We JAMES TANGYE of Aviary Cottage near Redruth in the County of Cornwall
Engineer and RICHARD JOHN CONNOCK of Carn View near Redruth in the County
of Cornwall Merchant do hereby declare the nature of this Invention to be as
follows:-
Our Invention has for its object to construct steam pumping Engines in a simple
economical and efficient manner.
In the working of Steam pumps where the steam is brought into more or less closo
contact with the liquid pumped a considerable loss is caused by condensation of steam
against the cooled surfaces of the Cylinder. Our Invention has for its object to
prevent this by heating the surfaces by means of the exhaust or waste steam as it is
discharged from the Cylinder on the completion of each stroke To effect this we
make use of a Cylinder of a length say about equal to twice the length of the working
stroke The said Cylinder is connected at one of its extremities to the pump
column between the suction and delivery valves. Working freely in this Cylinder
there is a hollow piston or plug of a longth preferably rather exceeding the length of
working stroke. To the upper end of the piston (or the portion nearest the Cylinder
cover) one or more light spring rings may be fitted to make it more nearly steam
tight and to the opposite end a disc of wood or similar material may be attached so as
to prevent actual contact of the liquid with the metal of the piston. When the
engine is at work the waste steam at the completion of each stroke is thrown into
the interior of the hollow piston on its way to the discharge or eduction pipe
imparting a portion of its heat to the body of the piston and keeping it at such a
temperature that the film of liquid which exists between the exterior of the piston
and the sides of the Cylinder is heated so as to prevent any considerable loss by
condensation of the working charge of steam.
For this purpose we attach a pipe opening to the interior of the hollow piston or
plug (the interior opening reaching nearly to the bottom of the cavity in order to
ensure the expulsion of any condensed water) the said pipe being carefully turned on
the outside in the manner of a piston rod so as to work through a stuffing box in the

page_text: top of the Cylinder in the ordinary manner the opposite extremity of the pipe or
hollow piston rod is also made to work through a stuffing box in the end of the
eduction pipe which is fixed so as to allow the rod to move to and fro in the eduction
pipe for the length of the stroke and is carefully adjusted so as to serve for a guide
for the piston rod.
The valve for the admission of steam to the Cylinder is fixed on the cover in any
suitable position and may be of any of the usual forms but the exhaust valve is placed
on the piston in the interior of the Cylinder and is actuated by a small rod passing
through a stuffing box in the Cylinder cover so as to be controlled by suitable gear in
connection with the steam valve.
The pumping Engine may be used as a high pressure engine by attaching a suitable
counterpoise but we prefer to work it in connection with a condenser which may be
of any form but the form we prefer is to place on the pump column a vessel fitted
with tubes in its interior through which the liquid pumped is inade to pass the exhaust
steam passing into it being condensed on the tubes in the manner of a surface condenser.
A small pipe fitted with a check valve opening outwards from the Condenser is made
to connect the interior of the Condenser with the rising column of the pump beneath
the delivery valve When the pump is at work any air in the Condenser will pass
through this valve into the main column maintaining a vacuum in the Condenser
balancing the resistance of the column of liquid from the surface of the well. This
pipe may also be made to serve for discharging the products of condensation but wo
prefer to do this by attaching a similar pipe and valve between the bottom of the
condenser and the bottom of the Cylinder so as to bring back these products with any
lubricant that may be carried over to the bottom of the Cylinder wliere it may again
become effective and avoid waste.
When used singly a light counterpoise is required to assist the out stroke but when
these engines are used in pairs or otherwise than singly this is not necessary.
Dated this 3rd day of September 1887.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London,
Agents for the said James Tangye
and Richard John Connock.

page_text: WO JAMES TANGYE of Aviary Cottage near Redruth in the County of Cornwall
Engineer and RICHARD JOHN CONNOCK of Carn View near Redruth in the County of
Cornwall Merchant do hereby declare the nature of this Invention and in what manner
the same is to be performed to be particularly described and ascertained in and by the
following statement :-
Our Invention has for its object to construct Steam pumping Engines in a simple
economical and efficient manner.
In the working of Steam pumps where the Steam is brought into more or less close
proximity or contact with the liquid pumped a considerable loss is caused by conden-
sation of Steam against the cold surfaces of the cylinder. Our Invention has for its
object to prevent this by heating those surfaces by means of the exhaust or waste
steam as it is discharged from the cylinder on the completion of each stroke.
Figure 1 of the accompanying drawings is a vertical Section of a Steam pumping
Engine arranged according to our Invention and Figure 2 is an enlarged Section of
part of the Steam cylinder and its attachments drawn to a larger Scale and taken in a
plane at right angles to the plane of the Section Figure 1.
According to our Invention we make use of a Cylinder C of a length, say, slightly
exceeding twice the length of the working stroke of the piston therein.
The said Cylinder is connected at one of its extremities to the pump column at A,
between the Suction valve E and delivery-valve E-Working freely in this Cylinder
there is a hollow piston or plug B of a length preferably rather exceeding the length
of the working stroke.
b
To the upper end of the piston B (or the portion nearest the cylinder cover) one or
moro light spring rings 6 may be fitted to make it more nearly steam tight and to the
opposite end a disc or cap of wood or similar material may be attached so as to prevent
actual contact of the metal of the piston with the liquid being pumped When the
engine is at work the exhaust steam at the completion of each stroke enters this
hollow piston on its way to the discharge or eduction pipe imparting a portion of its
heat to the body of the piston and keeping it at such a temperature that the film of
liquid which exists between the exterior of the piston and the sides of the cylinder is
heated so as to prevent any considerable loss of the working charge of steam by
condensation.
For this purpose we attach to the cylinder cover a pipe L opening into a pipe K in
the interior of the hollow piston or plug (the opening from the pipe K being at or
nearly at the bottom of the cavity in order to ensure the expulsion of any products of
condensation) The pipe L is turned on the outside and the tube k is bored on the
inside so as to work over each other there being packing rings at 1 to give a good fit
The piston B is provided with a piston rod I passing through the tubes K L and
through the stuffing box J The pipe L opens into the bend N and pipe H leading
into the outer air or the condenser if one be used.
The valve box containing the valve for the admission of steam to the cylinder C is
mounted on the cover in any suitable position and may be of any of the usual or
suitable forms but the exhaust valve O opens and closes a passage b' in the piston B
and is actuated by a rod P passing through a stuffing box p in the cylinder cover so
as to be controlled by suitable gear in connection with the steam valve The gear
shewn in Figure 2 is trip gear T-U being the cross head thereof and Q the spring for
adjusting the exhaust valve.

page_text: The pumping engine may be used as a high pressure engine by attaching a suitable
counterpoise but we prefer to work it in connection with a condenser which may be
of any form but the form we prefer is to place on the pump column a vessel F fitted
with tubes in its interior through which the liquid pumped is made to pass, the exhaust
steam passing into the said vessel being condensed by contact with the tubes in the
manner of a surface condenser-A small pipe R fitted with a check valve V opening
outwards from the condenser is made to connect the interior of the condenser with the
rising column of the pump beneath the delivery valve. When the pump is at work
any air in the condenser will pass through this valve into the main column maintaining
a vacuum in the condenser balancing the resistance of the column of liquid from the
surface of the well. This pipe also serves for discharging the products of condensa-
tion. When used singly a light counterpoise is required to assist the outstroke but
when these engines are used in pairs this is not necessary.
In place of the pipes K and L being arranged as illustrated the pipe L may be
omitted and the pipe K may be prolonged at its upper portion so as to work like a
piston rod through the stuffing box on the cylinder the pipe at its upper portion
passing into the eduction pipe H through a stuffing box which is fixed in a line with
the main stuffing box J so as to serve as a guide for the piston.
The engine and pump may be further simplified more especially when worked in
pairs by merely allowing the waste steam to pass off through a U pipe fixed in the
bottom of the piston as shewn at H in Figure 3 and furnished with a valve h at its
extremity opening outwards. 2 is a grid covering the valve The pipe H may be
long enough to dip some distance into the water chamber of the pump so that the
steam on issuing will be condensed by the inrush from the suction Any residual air
will be expelled up the column at the ensuing stroke-The parts which in Figure 3
correspond with those shewn in Figures 1 and 2 are marked with the same letters of
referonce.
It will be understood from the foregoing description that the steam after propelling
the piston in the cylinder enters the hollow piston by the valve O which is opened
when exhaust is to take place and the exhaust steam passes therefrom by the pipes
provided for its escape as herein before explained.
It will be readily understood that the details may be considerably varied without
departing from the nature of our Invention.
Having now particularly described and ascertained the nature of our said
Invention and the manner in which the same is to be performed we declare that
what we claim is.
First. In steam pumping engines a hollow piston or plug through which the exhaust
steam is passed substantially in the manner and for the purpose hereinbefore described.
Second. In steam pumping engines the combination of a hollow piston or plug
through which the exhaust steam passes and escape pipes from the said piston to
outside the cylinder into the open air or into a condenser or into the pump column
substantially as herein before described.
Third. The arrangement of a steam pumping engine as hereinbefore described and
illustrated in Figure 1 and 2 of the accompanying drawings.
Fourth. The arrangement of a steam pumping engine as herein before described and
illustrated in Figure 3 of the accompanying drawings.
1
31
T
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