IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES
Year: 1858

page_text: LETTERS PATENT to Felix Foucou, of No. 44, Rue Caumartin, in the City
of Paris, in the Empire of France, Civil Engineer, for the Invention of
"IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES "
Sealed the 17th September 1858, and dated the 25th March 1858.
PROVISIONAL SPECIFICATION left by the said Felix Foucou at the
Office of the Commissioners of Patents, with his Petition, on the
25th March 1858.
I, FELIX FOUCOU, of No. 44, Rue Caumartin, in the City of Paris, in the
Empire of France, Civil Engineer, do hereby declare the nature of the Inven-
tion for "IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES," to be as
follows:-
This Invention has for its object improvements in steam boiler and other
furnaces. For these purposes I employ a perforated plate of fire clay or other
suitable material, which slants from the top of the front of the furnace to the
back of the furnace a little above the fire bars, by which means, when fresh
coals are placed in the furnace, at which time the greater part of the smoke
and gases is evolved, the smoke and gases are heated by the heated perforated
plate; and in order to supply air to consume the smoke and gases at the top of
the space between the perforated plate and the front of the furnace, I employ
a pipe perforated at its upper part, which passes up the sides and over the top
of the front of the furnace, and I place a valve at the end of the pipe through
which the air is admitted, by which means the amount of air admitted can be
regulated.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Felix Foucou in the Great Seal Patent Office on the
25th September 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FELIX
Foucou, of No. 44, Rue Caumartin, in the City of Paris, in the Empire of
France, Civil Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of March, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-first year of Her
reign, did, for Herself, Her heirs, and successors, give and grant unto me, the
said Felix Foucou, Her special licence that I, the said Felix Foucou, my
executors, administrators, and assigns, or such others as I, the said Felix
Foucou, ny 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
STEAM BOILER AND OTHER FURNACES," upon the condition (amongst others) that
I, the said Felix Foucou, 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 Felix Foucou, 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 steam boiler and other
furnaces. For these purposes I employ a perforated plate of fire-clay or other
suitable material, which slants from the top of the front of the furnace to the back
of the furnace a little above the fire-bars, by which means, when fresh coals are
placed in the furnace, at which time the greater part of the smoke and gases
is evolved, the smoke and gases are heated by the heated perforated plate; and
in order to supply air to consume the smoke and gases, at the top of the space
between the perforated plate and the front of the furnace, I employ a pipe
perforated at its upper part, which passes up the sides and over the top of the
front of the furnace, and I place a valve at the end of the pipe through which

page_text: the air is admitted, by which means the amount of air admitted can be
regulated.
Having thus described the nature of my said Invention, I will proceed more
fully to describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 shews a section of a portion of the furnace of a locomotive arranged
according to my Invention. a, a, are the fire bars of the furnace; b is the
perforated plate of fire-clay or other suitable material, which slants from the
top of the front of the furnace to the back of the furnace, a little above the
fire bars a; this plate is supported by being built into a lining of fire-brick at
the two sides of the furnace, or it may be supported in any other suitable
manner. Figure 2 is a separate view of this plate, which shews the perforations
; the number of perforations 6' should be greater than the number of
tubes c of the locomotive boiler, so that the plate 6 may not check the draft.
When fresh coals are placed in the furnace, at which time the greater part of
the smoke and gases is evolved, the smoke and gases are heated by the
perforated plate which has been previously heated when the fire in the furnace
was bright, and in order to supply air to the top of the space between the
perforated plate and the front of the furnace to consume the smoke and gases
as they become heated by the plate b, I employ a pipe d, of earthenware or
other suitable material, in the upper part of which there are perforations d',
which pipe passes up the sides and over the top of the front of the furnace,
and there is a valve e at the end of the pipe through which the air is admitted,
by which the amount of air admitted can be regulated; this valve e is shown
clearly at Figure 3, which is a separate view of the pipe d and valve e, and I
would remark that although I have shewn my improvements applied only
to the furnace of a locomotive, they may also be applied generally to all kinds
of furnaces.
In witness whereof, I, the said Felix Foucou, have hereunto set my
hand and seal, this Twenty-second day of September, in the year of our
Lord One thousand eight hundred and fifty-eight.
FELIX FOUCOU. (L.S.)