IMPROVEMENTS IN FURNACES
Year: 1861

page_text: LETTERS PATENT to Daniel Kinnear Clark, of No. 11, Adam Street,
Adelphi, in the County of Middlesex, Civil Engineer, for the Invention
of "IMPROVEMENTS IN FURNACES."
Sealed the 12th November 1861, and dated the 16th May 1861.
PROVISIONAL SPECIFICATION left by the said Daniel Kinnear Clark at
the Office of the Commissioners of Patents, with his Petition, on the
16th May 1861.
J, DANIEL KINNEAR CLARK, of No. 11, Adam Street, Adelphi, in the County
of Middlesex, Civil Engineer, do hereby declare the nature of the Invention
for "IMPROVEMENTS IN FURNACES," to be as follows:-
This Invention has for its object improvements in furnaces. For these
purposes in order that the fuel may be burned with more advantage and
without emitting smoke, jets of steam are admitted at the upper part of the
furnace and over the door. Below the jets of steam a plate or partition is
fixed, in such manner that any air admitted below it will be prevented rising
to the top of the furnace till such air passes beyond the interposed plate or
partition which protrudes some distance into the furnace. It is preferred
that the door should on the interior have an inclined plate rising from the
lower part thereof; the space between it and the door is closed in at the ends,

page_text: so that any air admitted through or at the door may not pass directly into the
furnace, but be caused to rise up in the space formed between the inner
surface of the door and the inclined plate, and thus come against the under
side of the plate or partition interposed between the jets of steam and the door
of the furnace.
.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Daniel Kinnear Clark in the Great Seal Patent Office on the
16th November 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DANIEL
KINNEAR CLARK, of No. 11, Adam Street, Adelphi, in the County of Mid-
dlesex, Civil Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of May, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Daniel Kinnear Clark, Her special licence that I, the said Daniel Kinnear
Clark, my executors, administrators, and assigns, or such others as I, the said
Daniel Kinnear Clark, 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 Daniel
Kinnear Clark, 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 Daniel Kinnear Clark, 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 improvements in furnaces. For these
purposes, in order that the fuel may be burned with more advantage and

page_text: without emitting smoke, jets of steam are admitted at the upper part of the
furnace and over 'the door. Below the jets of steam a plate or partition is
fixed in such manner that any air admitted below it will be prevented rising
to the top of the furnace till such air passes beyond the interposed plate or
partition which protrudes some distance into the furnace. It is preferred that
the door should on the interior have an inclined plate: rising from the lower
part thereof; the space between it and the door is closed in at the ends, so
that air admitted through or at the door may not pass directly into the
furnace, but be caused to rise up in the space formed between the inner
surface of the door and the inclined plate, and thus come against the under
side of the plate or partition interposed between the jets of steam and the door
of the furnace.
any
Having thus stated the nature of my said Invention I will proceed more
fully to describe the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
Figuro 1 shows a longitudinal section, and Figure 2 a plan in section of a
furnace suitable for a fixed steam engine boiler, where the fire-place is internal
of the boiler, but the apparatus shewn therein for carrying out my Invention
may be similarly applied to other steam boiler furnaces, and also to other
furnaces not being steam boiler furnaces, so long as provision is made for
applying steam from a suitable contiguous boiler.
Figure 3 shows a vertical section of the fire-box of a steam engine boiler
with apparatus applied thereto according to my Invention suitable for loco-
motive engines and other uses. Above each of the fire-doors of the furnaces
there is affixed a plate a, by which any air which may enter at the fire-door
will be prevented rising directly upwards, but on the contrary the air so
entering must pass some distance towards the end of the furnace before it can
rise upwards. If desired the plate a may be fixed to the door, and be moved
in and out by it. Above this plate a and in the space thus enclosed above the
door there is a steam pipe b, arranged with suitable jet pipes or nozzles in
order that jets of steam may be introduced above the fuel in the fire-place;
c is an inclined plate attached to the lower part of the door; this inclined plate
may be hinged so as to admit of being adjusted.
The form of the apparatus for introducing jets of steam above the fuel in
fire-places of furnaces may be varied when carrying out my Invention, and.I
would state that I make no claim separately to the application of jets of steam
over the fuel of a furnace in a direction from the fire-door to the bridge or

page_text: ,back end of the furnace; and I further state that the peculiarity of the present
.Invention consists in the use of a plate a above the fire-door and below the
point where the jets of steam are introduced.
In witness whereof, I, the said Daniel Kinnear Clark, have hereunto set
my hand and seal, this Fifteenth day of November, in the year of our
Lord One thousand eight hundred and sixty-one.