IMPROVE- MENTS IN FURNACES
Year: 1853

page_text: LETTERS PATENT to Abraham Pope, of 81, Edgware Road, in the
County of Middlesex, Engineer, for the Invention of "IMPROVE-
MENTS IN FURNACES."
Sealed the 5th December 1858, and dated the 13th October 1853.
PROVISIONAL SPECIFICATION left by the said Abraham Pope at
the Office of the Commissioners of Patents, with his Petition,
on the 13th October 1853.
1, ABRAHAM POPE, of 81, Edgware Road, in the County of Middle-
sex, Engineer, do hereby declare the nature of my Invention for
"IMPROVEMENTS IN FURNACES" to be as follows:-
This Invention has for its object the better combustion of coal, and
preventing the forming and passing away of smoke, and consists of a
peculiar combination of parts. Each furnace has two sets of fire-bars
inclining towards the middle of the furnace, so that the fire is deepest
in the middle. In front is a dead plate, on to which the fuel is fed,
and from which it is pushed on to the fire-bars; at the back end of the
fire-bars there is a space for the passage of air between the bridge and
the ends of the fire-bars. The ash-pit is divided horizontally in such
manner that the same is divided into two parts, each part of the ash-

page_text: pit having its door or doors to regulate the passage of air, and to admit
of the supply of air thro' the ash-pit to the two sets of bars to be
different, the air passing into one part of the ash-pit not being allowed
to get into the other part of the ash-pit.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Abraham Popei n the Great Seal Patent Office
on the 18th April 185-4.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
ABRAHAM POPE, of 81, Edgware Road, in the County of Middlesex,
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of October, in the
year of our Lord One thousand eight hundred and fifty-three, in the
seventeenth year of Her reign, did, for Herself, Her heirs and succes-
sors, give and grant unto me, the said Abraham Pope, Her special
licence that I, the said Abraham Pope, my executors, administrators,
and assigns, or such others as I, the said Abraham Pope, 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 FURNACES,"
upon the condition (amongst others) that I, the said Abraham Pope, 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 Abraham Pope, do hereby
declare the nature of the said Invention, and in what manuer 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 better combustion of coal, and

page_text: preventing the forming and passing away of smoke, and consists of a
peculiar arrangement of parts. Each furnace has two sets of fire bars
inclining towards the middle of the furnace, so that the fire is deepest
in the middle. In front is a dead plate, te to which the fuel is fed,
and from which it is pushed on to the fire bars. At the back end of
the fire bars there is a space for the passage of air between the bridge
and the ends of the ire bars. The ashpit is divided horizontally in
such manner that the same is divided into two parts, each part of the
ashpit having its door or doors to regulate the passage of air, and to
admit of the supply of air through the ashpit to the two sets of bars
to be different, the air passing into one part of the ashpit not being
allowed to get into the other part of the ashpit.
Having thus stated the nature of the Invention, I will proceed to
describe the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
I
Figure 1, shows a longitudinal section of a steam boiler furnace
constructed according to my Invention. Figure 2, shows a transverse
section thereof. Figure 3, shows a front view, and Figure 4, a plan
of the same. a, b, are the two sets of bars, inclining to the middle
of the furnace, so that the fire over the middle of the furnaces is
deepest. c, is the bridge, between which and the end of the furnace
there is an opening for the passage of air between the end of the
furnace and the bridge. d, is the dead plate. e, is a horizontal division
or partition, which divides the ashpit into two parts in such manner
that by having doors or slides, the quantity of air admitted below the
front and back portions of the bars may be regulated. I have found
that this arrangement for supplying air to the ashpit, when combined
with inclined bars, is very important, when the draft is considerable;
but the horizontal partition may be dispensed with when the draft is
moderate.
Figure 5, shows a vertical section, and Figure 6, a plan in section
of another boiler furnace the ashpit of which is not divided; in other
respects the combination is the same as in the other Figures.
Having thus described the nature of my said Invention, and the

page_text: manner of performing the same, I would state that I am aware that
it has before been proposed to use the bars inclining towards the
middle of a furnace, wherein no bridge or dead plate was used. I
am also aware that it has before been proposed to divide an ashpit
horizontally when the bars have not inclined to each other and to the
middle of the furnace; and I am also aware that it is not new to use
a bridge curved or inclining towards the fire, nor is it new to have
a space between the end of the fire bars and a bridge for the passage
of air between them and the bridge. And I mention these matters in
order to state that I do not claim any of these parts separately. But
what I claim is, the combination of parts herein described.
In witness whereof, I, the said Abraham Pope, have hereunto
set my hand and seal, this Thirteenth day of April, in the
year of our Lord One thousand eight hundred and fifty-four.
Witness,
GEO. PITT,
4, Old Square.
ABRAHAM POPE. (L.S.)