IMPROVEMENTS IN Steam Boiler and other Furnaces
Year: 1872

page_text: LETTERS PATENT to Napoléon Felix Borciko de Chodzko, of Paris,
Rue de Babylone, No. 58, for the Invention of "IMPROVEMENTS IN
Steam Boiler and other Furnaces.”
Sealed the 6th December 1872, and dated the 17th June 1872.
PROVISIONAL SPECIFICATION left by the said Napoléon Felix Boreiko
de Chodzko at the Office of the Commissioners of Patents, with
his Petition, on the 17th June 1872.
I, NAPOLÉON FELIX BOREIKO DE CHODZKÓ, of Paris, Rue de Babylone,
No. 58, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN STEAM BOILER AND OTHER FURNACES," to be as follows:-
My Invention consists in arranging two grates one nearly over the
other, the upper one of which is intended to burn fresh coal or green
fuel, while the other which is below and a little to the rear receives the
incandescent fuel from the first grate and effects the combustion of the
gases which escape from it. The first grate consists of iron bars and
acts in the ordinary manner; the second grate is of refractory earth like

page_text: the sides of the fire-chamber, and is provided above and below with air
openings and with doors which allow the regulation of the draught and
the distribution of the air necessary for combustion. A bridge placed
above the second grate forces the gases which escape from the first to
turn downwards and become completely burnt by the heat of the second
grate.
By this improved arrangement the upper grate does not require
cleaning as at present; it is only necessary for the fireman with a con-
venient, iron or rabble to push the incandescent fuel from the first grate
towards the second grate, and to put a little fresh fuel from time to time
upon the first. There is thus both economy of time and fuel, and at the
same time a more rational utilization of all the calorific principle of the
combustibles.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Napoléon Felix Boreikọ de Chodzko in the Great 1
Seal Patent Office on the 9th December 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, NAPOLEON
FELIX BOREIKO DE CHODZKO, of Paris, Rue de Babylone, No. 58, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her:
Letters Patent, bearing date the Seventeenth day of June, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Napoleon Felix Boreiko de Chodzko, Her
special licence that I, the said Napoleon Felix Boreiko de Chodzko,
my executors, administrators, and assigns, or such others as I, the said
Napoleon Felix Borciko de Chodzko, 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 Napoleon Felix Boreiko
de Chodzko, my executors or administrators, by an instrument in writing

page_text: 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 Napoleon Felix Boreiko de Chodzko,
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 arranging two grates one nearly over the
other, the upper one of which is intended to burn fresh coal or green
fuel, while the other which is below and a little to the rear receives the
incandescent fuel from the first grate and effects the combustion of the
gases which escape from it. A bridge placed above the second grate
forces the gases which escape from the first to turn downwards and
become completely burnt by the heat of the second grate.
By this improved arrangement the upper grate does not require
cleaning as at present; it is only necessary for the fireman with a con-
venient iron or rabble to push the incandescent fuel from the first grate
towards the second grate, and to put a little fresh fuel from time to time
upon the first. There is thus both economy of time and fuel, and at the
same time a more rational utilization of all the calorific principles of the

page_text: powerful, the smoke and gases from the second grate B may be made to
deviate from their ordinary course by a bar or bridge C.
In some cases the front of the second grate B and the bridge C may
be made hollow in order to permit their communication with the boiler
and to cause the circulation of the water therein, with the object of
preserving it from the sudden action of the fire, and of augmenting the
heating surface as much as possible.
With this new construction of furnace, the upper grate A, as before
mentioned, will not require cleaning as at present effected; it will be
sufficient from time to time, say about once an hour, to traverse the
grate from one end to the other with a rabble constructed for the purpose,
pressing it strongly against the bars, the rabble in its passage after having
lifted the upper layer of fuel lets it fall upon the part of the grate which
it has cleared, and in its course drawing with it all which encumbers the
grate after having arrived at the end, turns all the incandescent fuel and
matters which it has collected upon the inclined plane D, which in its
turn leads them on to the lower grate B. After this operation has been
repeated over the whole surface of the grate, the upper furnace A will
be found perfectly cleaned without having been cooled in the smallest
degree, and the lower grate B will consume all the fuel and residues
which have not been already utilized by the upper grate A.
.
The object of the door F is to allow access to the lower grate B, and
the door G is that of the ash-pit, and should always be closed, since the
power of the fire at this place where the gases consume is so great
that the residues upon the lower grate are completely consumed, not-
withstanding that the door G is kept shut.
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,-
First. The construction and arrangement of my improved furnace for
steam and other boilers, as described with reference to the annexed
Drawings.
Secondly. The arrangement as herein-before described with reference
to the annexed Drawings of two grates, in the upper one of which the
fresh combustible is burned, and in the lower one of which the incan-
descent fuel and matters from the first are completely consumed.

page_text: upper from the lower grate, and which leads the incandescent fuel and
matters from the one to the other.
Fourthly. The bridge C intended to force the gases which escape from
the first grate into the second grate in order to there become completely
consumed.
In witness whereof, I, the said Napoleon Felix Boreiko de Chodzko,
have hereunto set my hand and seal, this Second day of December
One thousand eight hundred and seventy-two.
Witness,
N. F. BOREIKO DE CHODZKO. (L.S.)
CH. ARMENGAUD, Jeune,
Civil Engineer,
No. 23, Bt. de Strasbourg,
à Paris.
Ingen. Civil.