IMPROVEMENTS IN STEAM BOILERS
Year: 1857

page_text: LETTERS PATENT to Henry Bougleux, of Leghorn, for the Invention of
"IMPROVEMENTS IN STEAM BOILERS."
Sealed the 24th April 1857, and dated the 6th January 1857.
PROVISIONAL SPECIFICATION left by the said Henry Bougleux at the
Office of the Commissioners of Patents, with his Petition, on the 6th
January 1857.
I, HENRY BOUGLEUX, of Leghorn, do hereby declare the nature of the
Invention for "IMPROVEMENTS IN STEAM BOILERS," to be as follows:-
This Invention has for its object improvements in steam boilers.
In the
construction of some steam boilers it has been proposed to obtain additional
heating surface by means of hollow vessels introduced and fixed in the heated
surfaces of the boilers, into which hollow vessels the heat of the fires of the
furnaces having once entered could not get away without being absorbed by
the water surrounding such vessels, but heretofore when using such introduced
vessels no part of the draft has passed through them. Now, I have discovered
that it is desirable when using such vessels (of whatever shape they may be)
that some tendency to a draft should be produced, and my improvements
consists in applying a comparatively small tube or pipe to each of such vessels,
in order that a tendency to a draft through each of such vessels shall be

page_text: induced, whilst the main draft from the fires to the shafts or chimneys shall
remain through the main flues, as heretofore, the several tubes so used being
connected to a common flue in each case.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Bougleux in the Great Seal Patent Office on the
1st May 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
BOUGLEUX, of Leghorn, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of January, in the year of our Lord One
thousand eight hundred and fifty-seven, in the twentieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Henry Bougleux, Her special licenco that I, the said Henry Bougleux, my
executors, administrators, and assigns, or such others as I, the said Henry
Bougleux, 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 STEAM
BOILERS," upon the condition (amongst others) that I, the said Henry Bougleux,
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 per-
formed, 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 Henry Bougleux, do hereby declare the
nature of the 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, that is to say:-
This Invention has for its object improvements in steam boilers. In the
construction of some steam boilers it has been proposed to obtain additional
heating surface by means of hollow vessels introduced and fixed in the heated
surfaces of the boilers, into which hollow vessels the heat of the fires of the
furnaces having once entered could not get away without being absorbed by

page_text: the water surrounding such vessels, but heretofore when using such introduced
vessels no part of the draft has passed through them. Now, I bave discovered
that it is desirable when using such vessels (of whatever shape they may be)
that some tendency to a draft should be produced, and my improvements
consist in applying a comparatively small tube or pipe to each of such vessels,
in order that a tendency to a draft through each of such vessels shall be
induced, whilst the main draft from the fires to the shafts or chimneys shall
continue through the main flue, as heretofore, the several tubes so used being
connected to a common flue in each case.
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 DRAWING.
Figure 1 shews a vertical section, and Figure 2 a plan, in section, of a boiler
constructed according to my Invention. I prefer to apply my improvements
to upright cylindrical boilers; but the Invention may, if desired, be also
applied to other forms of steam boilers. a, a, is the upright cylindrical boiler;
b, b, is the fire or furnace below the boiler; c is a flue leading to the flue d
around the outside of the boiler, and from this flue d the products of com-
bustion pass by another flue (not shewn in the Drawing) to the chimney, and
it is through the flue c, d, that the chief of the draft takes place; e, e, are
vessels or chambers applied to the boiler over the fire, and these vessels or
chambers e, e, I prefer to be of the form shewn in the Drawing, that is, that
each vessel e shall be of a larger diameter above the entrance into it than it is
at the entrance; but this is not essential, as these vessels e may be of like
diameter all the way up, or they may each be conical, or of less diameter above
the entrances into them than they are at their entrances.
To the upper
part of each vessel or chamber e is applied a tube e', which rises up through
the water and steam in the boiler, and also through the upper part of the
boiler itself, as is shewn. These tubes e¹ are all combined by a flue e², and the
quantity of draft through the tubes e' is regulated by a valve or damper e³.
The object of thus applying tubes e¹ to vessels or chambers e is to obtain a
tendency to draft through each of the vessels or chambers e, in order that
the aeriform products of combustion may, when they have for the most part
parted with their heat, pass away slowly through the tubes e¹.
Having thus described the nature of my said Invention, and the manner of
performing the same, I would have it understood that what I claim is, the
application of tubes e¹ to vessels or chambers e of steam boilers, combined

page_text: with the use of an outlet or flue c for obtaining draft to the fire, as herein
explained.
In witness whereof, I, the said Henry Bougleux, have hereunto set my
hand and seal, this Twenty-ninth day of April, in the year of our Lord
One thousand eight hundred and fifty-seven.
Witness,
S. CARPMAEL.
H. BOUGLEUX. (L.S.)