IMPROVEMENTS IN REVERBERATORY AND OTHER FURNACES
Year: 1853

page_text: LETTERS PATENT to George Dalton, of Lymington, in the County of
Southampton, Gentleman, for the Invention of "IMPROVEMENTS IN
REVERBERATORY AND OTHER FURNACES."
Sealed the 11th January 1854, and dated the 11th July 1858.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Dalton in the Great Seal Patent Office,
on the 11th January 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
GEORGE DALTON, of Lymington, in the County of Southampton,
Gentleman, send greeting..

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of July, in the year of
our Lord One thousand eight hundred and fifty-three, in the seventeenth
year of Her reign, did, for Herself, IIer heirs and successors, give and
grant unto me, the said George Dalton, Her special licence that
I, the said George Dalton, my executors, administrators, and assigns,
or such others as I, the said George Dalton, my executors, adminis-
trators, 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
REVERBERATORY AND OTHER FURNACES," upon the condition (amongst
others) that I, the said George Dalton, 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 George Dalton, 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 thercof (that is to say):
My Invention consists of an improved mode of introducing atmo-
spheric air to the fire places of reverberatory and other furnaces; and
the improvement consists in causing the air to enter through openings
at the front or at the sides of the furnace, as may be found most con-
venient, and after traversing, by means of suitable flues or channels,
such as have before been used, the sides, bottom, or other heated
surfaces of the furnace, so as to collect as much as possible of the
waste heat, causing such heated air to pass into the closed ash pit
below the fire-bars through perforations or openings in cast iron plates
or other suitable material surrounding the ash pit or parts thereof; and
I find great advantage in having the perforations at the sides graduated,
as shewn in the Drawing, whereby the heated air is more suitably
distributed to all parts of the closed ash pit. The ash pit is to be

page_text: entirely closed in front, which can be done in any convenient manner,
such as by a door moving up and down between guides, and lifted by a
lever fixed to one side of the furnace, or by folding doors. When the
latter mode is preferred, I recommend the doors to be made shorter
than the opening into the ash pit, and the upper part of such opening
to be covered by a flap moving freely on hinges, and overlapping the
doors, which flap will be found useful in keeping the doors closed, and.
enabling the fireman conveniently to rake the fire.
I sometimes cause a portion of the heated air to enter the fire-place
above the fire-bars through perforations in plates of cast iron or other
suitable material, such as have been heretofore employed; but I make
no claim of novelty in respect of the mode of introducing heated air
into the fire-place above the fire-bars, except in combination with the
mode herein described for introducing heated air into the ash pits.
DESCRIPTION OF THE DRAWING.
Figure 1, shews a longitudinal section of a reverberatory furnace,
suitable for melting iron, constructed according to my Invention.
Figure 2, shews a plan in section of the furnace. And I would state,
in regard to other reverberatory furnaces, and also other furnaces, that
they are to be constructed in a similar manner to that shown by
Figures 1, and 2, so far as the heating and introducing air into the ash
pits are concerned.
The letters A, A, A, A, mark the course of a fluc or air channel
conducting atmospheric air along the heated surfaces of the furnace to
the fire grate below the fire-bars, which may be varied in form and
direction, and will, in fact, require to be varied to suit constructions of
furnaces differing from that shewn. B, B, B, are thick plates of cast
iron, forming the two sides and back of the ash pit, with perforations
for the passage of the heated air from the flues marked A, to the ash
pit. Figure 1, shows the perforations in the side plates B, graduated
as I prefer them to be. C, is a cast iron plate, forming the inner side
of that part of the flue A, which traverses the back of the ash pit.
The perforations in the plate B, forming the back of the ash pit are
small and few in number, and intended chiefly for the purpose of

page_text: inducing a sufficient circulation through that portion of the flue A.
D, is the ashpit, closed by folding doors and a flap, as described. E, is
the mouth of the air flue A, to which a slide may be conveniently
adapted to regulate the admission of air. By means of this flue A,
the air entering at E, traverses the heated
furnace, and becoming highly heated enters the ash pit through the
perforations in the cast iron plates B, B, B.
sides and bottom of the
Having thus described the nature of my Invention, and the manner
in wich the same may be performed, I would have it understood that
what I claim is, the mode of constructing reverberatory and other
furnaces, whereby air under atmospheric pressure only is caused, by
means of suitable flues or passages, to traverse more or less of the heated
surfaces of the furnace, and to pass through suitable openings into a
closed ash pit.
In witness whereof, I, the said George Dalton, have hereunto
set my hand and seal, this Twenty-seventh day of December, in
the year of our Lord One thousand eight hundred and fifty-
three.
Witness,
EDWARD LAWLEY PARKER,
Delawarr, n Lymington,
Hampshire.
GEORGE DALTON. (L.S.)