IMPROVEMENTS IN CONDENSERS AND AIR-PUMPS OF STEAM ENGINES
Year: 1882

page_text: LETTERS PATENT to Arthur Craven, Spinner, Bradford, and George James
Warburton, Engineer, Heckmondwike, both in the County of York, for an
Invention of IMPROVEMENTS IN CONDENSERS AND AIR-PUMPS OF STEAM
ENGINES."
"
PROVISIONAL SPECIFICATION left by the said Arthur Craven and George
James Warburton at the Office of the Commissioners of Patents on the
18th February 1882.
ARTHUR CRAVEN, Spinner, Bradford, and GEORGE JAMES WARBURTON, Engineer,
Heckmondwike both in the County of York. "IMPROVEMENTS IN CONDENSERS
AND AIR PUMPS OF STEAM ENGINES."
Our improvements consist in fitting to that class of condensers and air pumps
known as Wigzell and Pollit's, Patent, (No 2878 of 1877) an apparatus for improving
the vacuum, by which means we more effectively clear the condenser of water and
air thereby producing a more effective condensation, besides dispensing with a great
head of water in the condenser when starting the engine.
For this purpose we fit near the bottom of the condenser and by preference in
the centre line of the air pump, a pipe having near the end of the air pump barrel
a valve box in which is fitted a valve, the pipe extends from the valve box and is
made with a bent end which is connected to the end of the air pump barrel nearly
touching the delivery valve box. To condensers and air pumps now in use, we
prefer fitting a pipe and valve box on each side of the condenser and air pump
barrel to give a greater area for the passage of the water to the air pump barrel,
and we cut openings in the condenser and air pump barrel to which we fit the pipes
and connect the condenser with the air pump; we can also do away with the holes
or openings made round the air pump barrel.
When the piston of the air pump is near the delivery valves or at the

page_text: commencement of the stroke and put in action, the piston travels to the other
end of the stroke and forms a vacuum in the barrel of the air pump between the
piston and the delivery valves which causes the water and air in the condenser
to rush through the pipe or pipes, valve or valves, into the air pump barrel. On
the return of the stroke the valve or valves is or are closed and the piston forces
the water and air through the delivery valves into the chamber of the valves and
through the waste water pipe.
By which means we more effectively clear the condenser of water, producing a
more effective condensation and doing away with a great head of water in the
condenser.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Arthur Craven and George James Warburton in the Great Seal Patent
Office on the 11th August 1882.
ARTHUR CRAVEN, Spinner, Bradford and GEORGE JAMES WARBURTON, Engineer,
Heckmondwike, both in the County of York. "IMPROVEMENTS IN CONDENSERS
AND AIR PUMPS OF STEAM ENGINES."
The improvements consist in fitting to that class of condensers and air pumps
known as Wigzell and Pollit's Patent No 2878 of 1877 an apparatus for improving
the vacuum by which means we more effectively clear the condenser of water
thereby producing a more effective condensation besides dispensing with a great
head of water in the condenser when starting the engine.
For this purpose we fit near the bottom of the condenser and by preference in
the centre line of the air pump a pipe having near the end of the pump barrel a
valve box in which is fitted a valve; the pipe extends from the valve box and is
made with a bent end which is connected to the end of the air pump barrel nearly
touching the delivery valve box.
To condensers and air pumps now in use we prefer fitting a pipe and valve box
on each side of the condenser and air pu: p barrel to give a greater area for the
passage of the water to the air pump barrei and we cut openings in the condenser
and air pump barrel to which we fit the pipes and connect the condenser with the
air pump; we can also do away with the holes or openings made round the air
pump barrel.
On the
When the piston of the air pump is near the delivery valves or at the com-
mencement of the stroke and put in action, the piston travels to the other end of
the stroke and forms a vacuum in the barrel of the air pump between the piston
and the delivery valves which causes the water and air in the condenser to rush
through the pipe or pipes, valve or valves into the air pump barrel.
return of the stroke the valve or valves is or are closed and the piston forces the
water and air through the delivery valves into the chamber of the valves and
through the waste water pipes, by which means we more effectively clear the
condenser of water, producing a more effective condensation and doing away with
a great head of water in the condensers.
But in order to enable our improvements to be better understood, we will
proceed to describe the same by reference to the accompanying Drawing, in which
Figure 1, represents a sectional elevation of a condenser and air pump constructed
similarly to that known as Wigzell and Pollit's patent condenser and according to
the Specification of Letters Patent No. 2878 of 1877, shewing an opening cut or
formed in the air pump barrel which leads to a pipe having a valve box ;
Figure 2, is a plan and Figure 3, an end view of the said condenser and air pump.
Similar letters are employed to represent similar parts.
A, A, represent the pipes fitted near the bottom of the condenser B, on each side
thereof and by preference in the centre line of the air pump barrel C; the
pipes A, are made with valve boxes D, in which are fitted valves E, and they are
made with bent ends F, which are connected to the air pump barrel C, over the
openings G, cut or formed in the barrel C, and the bent ends nearly touch
the delivery valve box H.
To condensers and air pumps now in use, we prefer fitting a pipe A and valve
box D on each side of the condenser B, and air pump barrel C, to give a greater
area for the passage of the water to the air pump barrel and we cut openings G,
in the condenser and air pump barrel to which we fit the pipes A; by which means

page_text: we connect the condenser with the air pump and we also in some cases do away
with the holes or openings made in the air pump barrel; it is obvious that we may
fit one pipe A and valve box D. and valve E to the condenser and air pump
instead of fitting a pipe on each side of the condenser and air pump.
When the piston I of the air pump barrel C is near the delivery valves H or
at the commencement of the stroke and put in action, the piston I, travels to the
other end of the stroke forming a vacuum in the barrel C, between the piston I,
and the delivery valves H, which causes the water and air in the condenser to rush
through the pipe or pipes A and valve or valves Einto the air pump barrel C; on
the return of the stroke the valve or valves E is or are closed and the piston I
forces the water and air through the delivery valves H into the chamber J and
through the waste water pipe K.
By these means we more effectively clear the condenser of water, which
produces a more effective condensation and we do away with a great head of
water in the condenser.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed and carried out in
practice, we wish it to be understood that what we claim is :-
Fitting to condensers and air pumps as herein described pipes having valve boxes,
and valves for the purpose of improving the vacuum so as to more effectively clear
the condenser of water and produce a more effective condensation; substantially by
the means and in the manner hereinbefore described and illustrated by the
accompanying Drawing.
In witness whereof I the said Arthur Craven for and on behalf of myself and
the said George James Warburton have hereto set my hand and seal
this Tenth day of August in the year of our Lord One thousand eight
hundred and eighty two