AN IMPROVED METHOD OF ACCELERATING THE DRAFT IN FURNACES AND FIRE-PLACES
Year: 1863

page_text: LETTERS PATENT to Jerome Jean Pôtel, of Saint Quentin, in the Empire
of France, Engineer, for the Invention of "AN IMPROVED METHOD OF
ACCELERATING THE DRAFT IN FURNACES AND FIRE-PLACES."
Sealed the 24th November 1863, and dated the 29th May 1863.
PROVISIONAL SPECIFICATION left by the said Jerome Jean Pôtel at the
Office of the Commissioners of Patents, with his Petition, on the 29th
May 1863.
I, JEROME JEAN PÔTEL, of Saint Quentin, in the Empire of France, Engi-.
neer, do hereby declare the nature of the said Invention for "AN IMPROVED
METHOD OF ACCELERATING THE DRAFT IN FURNACES AND FIRE-PLACES," to be as
follows:-
My Invention consists in causing the smoke and products of combustion to
enter a pipe, flue, or conduit which is made to pass through or is otherwise
heated by the fire itself. The portion of the pipe so heated causes the accele-
ration of the draft.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Jerome Jean Pôtel in the Great Seal Patent Office on the
28th November 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JEROME
JEAN PÔTEL, of Saint Quentin, in the Empire of France, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
"Patent, bearing date the Twenty-ninth day of May, in the year of our Lord
One thousand eight hundred and -three, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Jerome Jean Pôtel, Her special licence that I, the said Jerome
Jean Pôtel, my executors, administrators, and assigns, or such others as I, the
said Jerome Jean Potel, 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
METHOD OF ACCELERATING THE DRAFT IN FURNACES AND FIRE-PLACES,' upon
the condition (amongst others) that I, the said Jerome Jean Pôtel,
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 Jerome Jean Pôtel, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-
formed, 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 causing the smoke and products of combustion to
enter a pipe, flue, or conduit which is made to pass through or is otherwise
heated by the fire itself. The portion of the pipe so heated causes the accele-
ration of the draft.
In order that my Invention may be well understood, I proceed to shew
it applied to steam boiler furnaces, to a ship's cooking stove. and to a house
stove.
Figure 1 is a section of a steam boiler furnace on the line C, D, of Figure 3 ;

page_text: Figure 2 is a section on the line G, H, of Figure 4; Figure 3 is a section
on the line E, F, of Figure 2. 0, 0, are plates fixed in the top of the furnace.
The heated gases and products of combustion pass as indicated by the arrows
through the conduit between the plates and top of the furnace. These
plates form the base of the chimney, and being heated by the furnace accelerate
the draft.
Figure 5 is a section of another arrangement of steam boiler furnace on the
line L, M, of Figure 6, and Figure 6 is a section on the line J, K, of Figure 5.
0, 0, are metal plates forming the top of the furnace and base or foot of the
chimney. These plates being heated directly by the furnace accelerate the
draft. The gases and products of combustion follow the course indicated by
the arrows.
Figure 7 is a section on the line C, D, of Figure 8, and Figure 8 is a
section on the line A, B, of Figure 7 of a ship's cooking stove. 0, 0, are
metal plates forming the base of the chimney; they are heated directly by the
furnace and accelerate the draft. The gases and heated products of combustion
follow the course indicated by the arrows.
Figure 9 is a vertical section and Figure 10 a section on the line C, D, of
Figure 9 of a house stove. O is a metal conduit or flue heated by the fire,
down which the gases and other products of combustion pass into side flues
and thence into the chimney, as indicated by the arrows.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim, accelerating the
draft in furnaces and fire-places by causing the smoke and other products of
combustion to enter a pipe, flue, or conduit heated by the fire itself, sub-
stantially in manner herein-before described.
In witness whereof, I, the said Jerome Jean Pôtel, have hereunto set my
hand and seal, this Twenty-fourth day of November, One thousand
eight hundred and sixty-three.