AN IMPROVED ARRANGEMENT OF STEAM BOILER AND FURNACE
Year: 1866

page_text: LETTERS PATENT to Thomas Dixon, of Low Moor, in the County of York,
Engineer, for the Invention of "AN IMPROVED ARRANGEMENT OF STEAM
BOILER AND FURNACE."
Sealed the 15th March 1867, and dated the 19th September 1866.
PROVISIONAL SPECIFICATION left by the said Thomas Dixon at the
Office of the Commissioners of Patents, with his Petition, on the 19th
September 1866.
I, THOMAS DIXON, of Low Moor, in the County of York, Engineer, do
5 hereby declare the nature of the said Invention for "AN IMPROVED ÅRRANGE-
MENT OF STEAM BOILER AND FURNACE," to be as follows:-
My Invention consists in the arrangement or combination as hereafter
described of a Juckes' furnace, or other similar furnace having endless travelling
bars, and of a Cornish boiler. I build or place immediately in front of a
O Cornish boiler a Juckes' or other similar furnace surrounded with or set in
brickwork or other material, and I carry the heated gases or flame directly
from the furnace thro' the flue or flues of the boiler. I am aware that
furnaces of this description have before been employed in combination with
boilers, but the intense heat has been carried immediately from the furnace to
the bottom of the boiler, where the greatest accumulation of sediment naturally
exists, so that such accumulation has prevented the most effective absorption
of heat, and the material and joints of the boiler bottom have become
injuriously affected.

page_text: In carrying out my Invention I prefer to close the front of the ash-pit with
convenient doors, and to make the brickwork surrounding the furnace hollow,
so that the air required for the combustion of the fuel is conveyed through the
brickwork; by this arrangement the heat from the brickwork surrounding the
furnace is utilized, for the air as it passes thro' the hollow portion absorbs
a part of the heat, and thereby facilitates the combustion. I provide for the
expansion and contraction of the furnace by building it in a frame movable on
rollers, and connected to the boiler to allow of the requisite expansion and
contraction in all directions without injury to the brickwork.
I do not limit myself to making the brickwork hollow, as it may be made
solid, and the air required for combustion may then be admitted by the ash-
pit or otherwise. By means of my improved arrangement of boiler and
furnace smoke is prevented and economy of fuel effected.
I do not confine myself to the use of brick furnaces, but sometimes employ
at the end of the ordinary Cornish boiler a supplimentary fire-box of wrought
iron made very similar to that of a locomotive fire-box, and arranged in com-
bination with brickwork and other materials to effect the objects before
described,
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Dixon in the Great Seal Patent Office on the
19th March 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
DIXON, of Low Moor, in the County of York, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Nineteenth day of September, in the year of our
Lord One thousand eight hundred and sixty-six, in the thirtieth year of Her
reign, did, for Herself, Her beirs and successors, give and grant unto me, the
said Thomas Dixon, Her special licence that I, the said Thomas Dixon, my
executors, administrators, and assigns, or such others as I, the said Thomas
Dixon, 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 "AN IMPROVED ARRANGEMENT OF
STEAM BOILER AND FURNACE," upon the condition (amongst others) that I, the
said Thomas Dixon, my executors or administrators, by an instrument in

page_text: 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 Thomas. Dixon, 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 thereof, reference being had to the Drawings hereunto annexed, that
is to say:
My Invention consists in the arrangement or combination as herein-after
described of a Juckes' furnace, or other similar furnace having endless travelling
bars, and of a Cornish boiler. I build or place immediately in front of a
Cornish boiler a Juckes' or other similar furnace surrounded with or set in
brickwork or other material, and I carry the heated gases or flame directly
from the furnace through the flue or flues of the boiler. I am aware that
furnaces of this description have before been employed in combination with
boilers, but the intense heat has been carried immediately from the furnace to
the bottom of the boiler, where the greatest accumulation of sediment naturally
exists, so that such accumulation has prevented the most effective absorption
of heat, and the material and joints of the boiler bottom have become
injuriously affected.
. In carrying out my Invention I prefer to close the front of the ash-pit with
convenient doors, and to make the brickwork surrounding the furnace hollow,
so that the air required for the combustion of the fuel is conveyed through the
brickwork; by this arrangement the heat from the brickwork surrounding the
furnace is utilized, for the air as it passes through the hollow portion absorbs
a part of the heat, and thereby facilitates the combustion. I provide for the
expansion and contraction of the furnace by building it in a frame movable on
rollers, and connected to the boiler to allow of the requisite expansion and
contraction in all directions without injury to the brickwork.
I do not limit myself to making the brickwork hollow, as it may be made
solid, and the air required for combustion may then be admitted by the ash-pit
or otherwise.
I do not confine myself to the use of brick furnaces, but sometimes employ
at the end of the ordinary Cornish boiler a supplementary fire-box of wrought
iron made very similar to that of a locomotive fire-box, and arranged in
combination with brickwork and other materials to effect the objects before
described.

page_text: Figure 1 of the accompanying Drawings is a longitudinal section of a brick
furnace with cavities, air passages, closed ash-pit, and rollers for expansion
applied to a Cornish boiler; Figure 2 is a cross section; Figure 3 a plan, and
Figure 4 a front view of the same.
a, a, shows a portion of the front end of an ordinary Cornish steam boiler
with internal flues b, b; c, c, is the brickwork, securely attached with bolts d, d,
and framework e, e, to the boiler end; f, f, are metal plates for carrying the
brick furnace on the rollers 9, 9, to provide for the motion of the furnace by
the expansion and contraction of the boiler; h, h, are openings in the top of
the furnace with regulators h¹, h³, for admitting and regulating the supply of
air from the atmosphere into the cavities i, i, of the brickwork, in which
cavities the air absorbs a portion of heat from the brickwork; this air then
moving through the passages k, k, openings 1, 1, and closed ash-pit m to the
under side of the grate is utilized in assisting efficient combustion of fuel on
the grate. The ash-pit m is provided with a wrought or cast iron casing at the
front end n secured to the metal frame of the movable grate, so as to make as
far as practicable the casing air-tight; and doors n', n¹, are provided on the
casing to supply (if necessary) air at the front of the ash-pit, and to facilitate
the withdrawal of the ash-pan from the ash-pit should the supply of air be
taken through the cavities and passages before mentioned; o is the blow-off
cock and pipe; p, the mud-hole and door; and q, non-conducting material to.
prevent waste of heat from the furnace top; r is a water bridge with con-
nections. In some instances, as before referred to, I construct brickwork
furnaces without cavities, closed ash-pits, and expansion rollers, and I then
provide for the expansion by making a narrow space between the back end of
the furnace and the front end of the boiler, so that the boiler when hot will
not put undue strain upon the brickwork.
Figure 5 shows a cross section of a furnace with a supplementary steam
boiler applied to a Cornish or internal flued boiler; Figure 6 is a longitudinal
section of the same. a, a, are the internal flued boiler and flues; b; b, is the
supplementary boiler; c, c, brickwork with plates, rollers, and connections to
ensure the motion of the supplementary boiler and furnace by the expansion
and contraction of the internal flued boiler; d, d, are the steam pipes, and e, e,
the feed pipes.
Figures 7 and 8 show a furnace applied to an internal flued boiler, and
with supplementary steam boilers forming the sides of the furnaces. a, a, shews
a portion of an ordinary internal flued boiler and flues; b, b, are the supple-
mentary boilers; c, c, is the brickwork for the same with supports and
connections; d, d, are the steam pipes, and e, e, the feed pipes; f, f, are

page_text: water bridges with ordinary connections to the boiler, but where preferred the
water bridge can be rivetted to the supplementary boilers, and the ordinary
connections may thereby be dispensed with. By means of my Invention
smoke is prevented and economy of fuel effected.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I wish it to be understood that I do not
confine myself to the precise details herein-before described and shewn in the
Drawings, provided that the peculiar character of my Invention is maintained;
but I claim,
First, the arrangement or combination of a Cornish or internal flued boiler
and of a Juckes' or other similar furnace having air cavities and passages,
closed ash-pit, and rollers, for permitting of expansion, substantially as herein-
before described and represented in Figures 1 to 4 of the accompanying
Drawings.
Second, the building or placing immediately in front of a Cornish or internal
flued boiler of a Juckes' or other similar furnace, whereby the heated gases or
flame are carried directly from the furnace through the flue or flues of the
boiler, substantially as herein-before described and represented in the ac-
companying Drawings.
In witness whereof, I, the said Thomas Dixon, have hereunto set my
hand and seal, this Sixteenth day of March, One thousand eight
hundred and sixty-seven.