IMPROVEMENTS IN COLLECTING THE INFLAMMABLE GASES GENERATED IN BLAST FURNACES
Year: 1857

page_text: LETTERS PATENT to Charles Edward Darby, of Brymbo Iron Works,.
near Wrexham, for the Invention of "IMPROVEMENTS IN COLLECTING THE
INFLAMMABLE GASES GENERATED IN BLAST FURNACES"
Sealed the 31st July 1857, and dated the 8th May 1857.'
PROVISIONAL SPECIFICATION left by the said Charles Edward Darby at'
the: Office of the Commissioners of Patents, with his Petition, on the'
8th May 1857.
I, CHARLES EDWARD DARBY, of Brymbo Iron Works, near Wrexham, do
hereby declare the nature of the Invention for "IMPROVEMENTS IN COLLECTING.
THE INFLAMMABLE GASES GENERATED IN BLAST FURNACES," to be as follows:-
This Invention has for its object improvements in collecting the inflam-
mable gases generated in blast furnaces. Heretofore, for this purpose, various
plans have been adopted, but the most usual is to close the top of the furnace
by a valve, which opens only to allow the furnace to be fed, and to lead the
gases off from the chamber formed at the upper part of the furnace by closing.
its top; as above mentioned, by means of a pipe which passes into the furnace
at a point immediately under the closing valve. Now, this Invention consists
in collecting the gases by means of a pipe' which descends down through the
open mouth of the furnace and dips a distance into the coal, ore, and other
materials with which the furnace is charged, or by means of a pipe passing
through the side of the furnace, and penetrating into the coal, ore, and other
material, until it arrives at or approaches near the centre or axis of the
furnace.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles. Edward Darby in the Great Seal Patent Office on
the 7th November 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
EDWARD DARBY, of Brymbo Iron Works, near Wrexham, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of May, in the year of our Lord One
thousand eight hundred and fifty-seven, in the twentieth year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto me, the said Charles
Edward Darby, Her special licence that I, the said Charles Edward Darby,
my executors, administrators, and assigns, or such others as I, the said Charles
Edward Darby, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times 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 COL-
LECTING THE INFLAMMABLE GASES GENERATED IN BLAST FURNACES," upon the
condition (amongst others) that I, the said Charles Edward Darby, 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 Charles Edward Darby, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:
This Invention has for its object improvements in collecting the inflam-
mable gases generated in blast furnaces. Heretofore, for this purpose. various
plans have been adopted, but the most usual is to close the top of the furnace
by a valve,, which opens only to, allow the furnace to be fed, and to lead the
gases off from the chamber formed at the upper part of the furnace by, closing
its top, as above mentioned, by means of a pipe which passes into the furnace
at a point immediately, under the closing valve. Now, this Invention consists
in collecting the gases. by means of a pipe which descends down through the
open mouth of the furnace and dips a distance into the coal, ore, and other
materials with which the furnace is charged, or by means of a pipe passing

page_text: through the side of the furnace and penetrating into the coal, ore, and other
material, until it arrives at or approaches near the centre or axis of the
furnace.
. And in order that my said Invention may be most fully understood and
readily carried into effect, I will proceed to describe the Drawing hereunto
annexed.
DESCRIPTION OF THE DRAWING.
The Drawing shows a vertical section of the upper part of a furnace,
having a pipe for collecting the gases arranged according to my Invention
combined with it. a, a, is the external wall of the furnace; 6 is the lining;
and c is the pipe for collecting the gases; it descends down through the open
mouth of the furnace and dips into the coal, ore, and other materials with
which the furnace is charged. The end of the pipe c within the furnace may
be protectid with an external case, between which and the exterior of the
tube water may be caused to circulate in the manner of a water tuyere. The
red lines in the Drawing show the direction the pipe takes when in place of
descending down through the open mouth of the furnace it is passed through
its side in such a way as to arrive at or approach near the centre or axis of
the furnace.
In witness whereof, I, the said Charles Edward Darby, have hereunto
set my hand and seal, this Fifth day of November, in the year of our
Lord One thousand eight hundred and fifty-seven.
CHARLES EDWARD DARBY. (L.S.)
Witness,
THOMAS MORGAN,
Brymbo Iron Works.
Nov. 5th 1857.