IMPROVEMENTS IN SUPPLYING AIR TO FURNACES
Year: 1854

page_text: LETTERS PATENT to Joseph Beardmore, junior, of Stowage, Deptford, in
the County of Kent, for the Invention of "IMPROVEMENTS IN SUPPLYING
AIR TO FURNACES."
PROVISIONAL SPECIFICATION left by the said Joseph Beardmore at
the Office of the Commissioners of Patents, with his Petition, on the
14th August 1854.
I, JOSEPH BEARDMORE, junior, of Stowage, Deptford, in the County of Kent,
do hereby declare the nature of the Invention for "IMPROVEMENTS IN SUPPLYING
AIR TO FURNACES" to be as follows:-
This Invention has for its object the introduction of heated air into furnaces
under more favourable circumstances, and consists of employing hollow fire
bars in combination with hollow iron bridges. For this purpose the fire bars
are made hollow, and the air enters intermediate of the length or other con-
venient part of the fire bars, and in such manner that the air entering the
hollow fire bars partly proceeds to the interior of a cast-iron bridge at the
back end of the furnace, and partly to the front end of the furnace, by which
means the air becomes very highly heated, and enters at the ends of the
furnace, and, if desired, at other parts of the furnace also. The air entering.
the hollow fire bars may, when desired, be regulated by a valve or slide.
The air admitted to the furnace is thus very highly heated, and by becoming so
keeps down the temperature of the fire bars and iron bridge.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Beardmore in the Great Seal Patent Office on the
18th February 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPII
BEARDMORE, junior, of Stowage, Deptford, in the County of Kent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourteenth day of August, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Joseph Beardmore, Her special licence that I, the said Joseph
Beardmore, my executors, administrators, and assigns, or such others as 1,
the said Joseph Beardmore, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all
dmes 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 "In-
PROVEMENTS IN SUPPLYING AIR TO FURNACES," upon the condition (amongst
others) that I, the said Joseph Beardmore, by an instrument in writing under
my hand and seal, 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 Joseph Beardmore, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):
:-
This Invention has for its object the introduction of heated air into furnaces
under more favorable circumstances, and consists of employing hollow fire
bars in combination with hollow iron bridges. For this purpose the fire bars
are made hollow, and the air enters intermediate of the length or other con-
venient part of the fire bars, and in such manner that the air entering the
hollow fire bars partly proceeds to the interior of a cast-iron bridge at the
back end of the furnace, and partly to the front end of the furnace, by which
means the air becomes very highly heated, and enters at the ends of the
furnace, and, if desired, at other parts of the furnace also. The air entering
the hollow fire bars may, when desired, be regulated by a valve or slide. The
air admitted to the furnace is thus very highly heated, and by becoming so
keeps down the temperature of the fire bars and iron bridge.

page_text: Having thus stated the nature of my said Invention, I will proceed to
describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 shews a longitudinal section, Figure 2 a transverse section, and
Figure 3 is a plan, of a furnace constructed according to my Invention.
a, b, are two sets of hollow fire bars, so arranged that air is admitted from
below at the back ends of the bars a, and at the front ends of the bars b, by
which the air will become highly heated, and the bars to some extent cooled.
1 would, however, remark that I am aware that it is not new to employ
hollow fire bars to obtain heated air to the bridge at the back end of a furnace ;
I do not, therefore, claim the hollow bars when so employed. The heated air
from the bars a, a, enters the air channel c, by which the air is conducted to
the two upright passages d, d, one on either side of the furnace and at the
front end thereof. The heated air from the bars b, b, passes into the hollow
bridge c, and out at the upper part thereof. By these means heated air will
be supplied at both ends of the furnace, and by mixing with the uninflamed
products of combustion will aid to inflame them. Figure 4 shows a longitudinal
section of a furnace where only one set of hollow fire bars a is used, in com-
bination with the parts c and d, for introducing heated air at the front end of
the furnace only, and not at the back also.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that what I claim is, the
combination of the parts a, c, d, for supplying heated air to the front ends of a
furnace, and combined therewith the parts b, e, for supplying heated air to the
back ends of a furnace.
In witness whereof, I, the said Joseph Beardmore, have hereunto set
my hand and seal, this Thirteenth day of February, in the year of
our Lord One thousand eight hundred and fifty-five.
30 Witness,
S. CARPMAEL.
JOSEPH BEARDMORE, JUN". (L.S.)