IMPROVEMENTS IN AND APPLICABLE TO STEAM BOILERS FOR THE PURPOSE OF INCREASING THE DRAUGHT AND UTILISING THE PRODUCTS OF COMBUSTION THEREIN
Year: 1873

page_text: LETTERS PATENT to William Wright, of Sheffield, in the County
of York, Plumber, for the Invention of "IMPROVEMENTS IN AND
APPLICABLE TO STEAM BOILERS FOR THE PURPOSE OF INCREASING THE DRAUGHT
AND UTILISING THE PRODUCTS OF COMBUSTION THEREIN.
•
PROVISIONAL SPECIFICATION left by the said William Wright at
the Office of the Commissioners of Patents, with his Petition, on
the 28th June 1873.
I, WILLIAM WRIGHT, of Sheffield, in the County of York, Plumber,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN AND APPLICABLE TO STEAM BOILERS FOR THE PURPOSE OF INCREASING THE
DRAUGHT AND UTILISING THE PRODUCTS OF COMBUSTION THEREIN," to be as
follows:-
:
My Invention has for its object the increasing of the draught and
heating surface in boilers and utilising the products of combustion, and
consists in the arrangement for these purposes inside the boiler of a
series of metal coils, one inside the other, up to the water line, through

page_text: which coils the heat from a furnace or other source of heat, after
evaporating the water surrounding them, passes into a smoke box or
chamber. The heat and products of combustion contained in this
chamber are conveyed therefrom by a pipe which dips into water in a
cistern or leads into condensers, which cistern or condensers is or are
exhausted either by a fan or an air pump. By this arrangement the
tar and ammonia contained in the said products of combustion will be
deposited or collected in the water of the cistern or in the condensers,
and drawn off as required, while the refuse matter is driven off by means
of the fan or the air pump.
Also for the purpose of employing waste steam as a source of heat,
the said steam is admitted into a chamber at the top of a corresponding
boiler, and passes down through the coils heating the water in the boiler,
and enters an outer casing, from which there is an outlet at the top.
At the bottom of this casing there is a syphon for the discharge of
condensed water. Also at the top-of-the-casing is a pipe with a valve
opening upwards connected with the boiler above described (or other
form of boiler) through which steam passes into such boiler from the
boiler heated by the waste steam at a higher pressure than the steam in
the original boiler.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Wright in the Great Seal Patent Office
on the 24th December 1873.
TO ALL TO WHOM. THESE PRESENTS SHALL COME, I, WILLIAM
WRIGHT, of Sheffield, in the County of York, Plumber, send greeting.
:
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of June, in the year
of our Lord One thousand eight hundred and seventy-three; in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said William Wright, Her
special licence that I, the said William Wright, my executors.
administrators, and assigns, or such others as I, the said William
Wright, my executors, administrators, and assigns,, should at any
time agree with, and no others, from time to time and at all times
.

page_text: thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVEMENTS IN AND APPLICABLE TO STEAM BOILERS FOR THE PURPOSE OF
INCREASING THE DRAUGHT AND UTILIZING THE PRODUCTS OF COMBUSTION THEREIN,"
upon the condition (amongst others) that I, the said William Wright,
my executors or administrators, by an instrument in writing under
my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and
'immediately after the date of the said Letters Patent.
. NOW KNOW YE, that I, the said William Wright, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in
and by the following statement, reference being had to the Drawings
hereunto annexed and to the letters and figures marked thereon (that
is to say):-
My Invention has for its object the increasing of the draught and
beating surface in boilers and utilizing the products of combustion, and
consists in the arrangements for these purposes inside the boiler of a
series of metal coils, one inside the other, up to the water line, through
which coils the heat from a furnace or other source of heat passes into a
smoke box or chamber. The heat and products of combustion contained
in this chamber are conveyed therefrom by a pipe to an exhaust fan, and
thence through another pipe which dips into water in a cistern or leads
into condensers. The said fan or air pump exhausts on the boiler side
and forces the vapour on the side of the cistern or condensers. By this:
arrangement the tar and ammonia contained in the said products of
combustion will be deposited or collected in the water of the cistern or
in the condensers, and drawn off as required, while the refuse matter is
drawn off by means of a tap at the bottom of the cistern.
Also for the purpose of employing waste steam as a source of heat,
tho said steam is admitted into a chamber at the top of a corresponding
boiler, and passes down through the coils, heating the water in the boiler,
and enters an outer casing, from which there is an outlet at the top.
At the bottom of this casing there is a syphon for the discharge of

page_text: form of boiler) through which steam passes into such boiler from the
boiler heated by the waste steam at a higher pressure than the steam in
the original boiler.
. Having thus stated the nature of the said Invention I will proceed to
describe. more particularly in what manner the same is to be performed
by the aid of the accompanying Drawings..
DESCRIPTION OF THE DRAWINGS.
.
Fig. 1 is a vertical section of an upright boiler set in the usual way.
A, A, is the ordinary brickwork; B is a flue supplied with a damper or
valve C, which flue leads to the chimney; D is the fire-place; E, E, are
coils one within another leading from the fire-box up into the smoke
chamber F, from the top of which the pipe G leads to the fan or exhaust
H, from which another pipe I leads into the cistern J, which is filled
with water up to a level higher than the mouth of the pipe I. At the
top of this cistern is inserted a pipe K, leading into the flue B, at a point
above the damper or valve L, is a cock or tap. to draw. off tar or refuse
from the bottom of the cistern; M is a cock or tap for supplying the
cistern with water as required. By means of this arrangement of coils
an increased amount of heating surface is obtained, and by the aid of
the fan or exhaust H an improved draught is produced; also the smoke
and products of combustion are forced through the water in the cistern
J'and caused to deposit therein the ammonia and tar contained in
them.
Fig. 2 represents the mode of adapting and applying the above
described fan or exhaust and cistern or condenser to ordinary boilers and
furnaces. A damper or valve is inserted in the ordinary flue in order to
intercept the vapour passing from the furnace, and cause it to pass
through the apparatus, and thence into the chimney at a point above the
damper.
Fig. 3 represents an upright boiler with an outer case and a space
between it and the boiler. In this instance the exhaust steam from the
cylinder of an engine is discharged into the chamber at the top of the
boiler, whence it is caused to pass downwards through the coils E, E,
into the outer casing at the bottom, and escapes at the top of the boiler

page_text: through the pipe N. There is a syphon pipe O at the bottom for the
discharge of the condensed water. The effect of this arrangement is
that the exhaust steam from a cylinder is passed through the coils and
round the outer surface of the boiler, thereby obtaining an increased
amount of heating surface. P is a pipe with a valve in it opening
upwards leading from the
with it.
boiler to the original boiler connected
The above described boilers are furnished with the usual apparatus for
both feeding them with water and discharging the steam.
Having thus described the nature of the said Invention, and in what
manner the same is to be performed, I hereby declare that what I claim
as of my Invention is,-
First. The mode described of increasing the draught and the heating
surface in steam boilers by means of coils for the passage of heat and
exhausting and condensing apparatus, as herein-before described.
And, Secondly. The application of the exhausting and condensing
apparatus to ordinary boilers.
In witness whereof, I, the said William Wright, have hereunto
set my hand and seal, the Twenty-second day of December, in the
year of our Lord One thousand eight hundred and seventy-
three.
Witness,
HENRY CLIFFORD,
Hotel Keeper,
WILLIAM WRIGHT. (L.S.)
21, Red Lion St., Holborn,
London.