IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS
Year: 1856

page_text: LETTERS PATENT to Henry Bougleux, of Leghorn, for the Invention of
"IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS."
PROVISIONAL SPECIFICATION left by the said Henry Bougleux at the
Office of the Commissioners of Patents, with his Petition, on the
25th November 1856.
I, HENRY BOUCLEUX, of Leghorn, do hereby declare the nature of the
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS," to be as
follows:-
This Invention has for its object improvements in the construction of steam
boilers, for which purposes those parts of a boiler which are heated have
vessels fixed on the inside with an opening for each through the boiler. These
internal vessels are made of larger diameter beyond the openings into them than
at the openings, the object being not only to increase the heating surface of the
boiler, but also to form receivers or receptacles for the heated products from
the fire, and so that when such heated products once enter such vessels they
cannot get away without the heat being absorbed by the water in the boiler.
It should be stated that it has before been proposed to increase the heating

page_text: surfaces of boilers by the use of cups, the interiors of which do not increase in
diameter beyond the openings into them; and I would remark that my improve-
ments, as above stated, are not intended simply to increase the heating surfaces
of a boiler, but to retain the heated products of combustion within the interior
of the applied vessels, by having them of increased diameter within as compared
with the openings into them.
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 Twenty-fifth day of November, in the year of our Lord
One thousand eight hundred and fifty-six, 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 licence that I, the said Henry Bougleux,
my executors, administrators, and assigns, or such others as I, the said Henry
Bougleux, my executors, administrators, or 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
THE CONSTRUCTION OF STEAM BOILERS," upon the condition (amongst others) that
I, the said Henry. Bougleux, my executors or adminstrators, 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 Henry Bougleux, 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:-
The Invention has for its object improvements in the construction of steam
boilers, for which purposes those parts of a boiler which are heated have

page_text: vessels fixed on the inside within an opening for each through the boiler. These
internal vessels are made of larger diameter beyond the openings. into them
than at the openings, the object being not only to increase the heating surface
of the boiler, but also to form receivers or receptacles for the heated products
from the fire, and so that when such heated products once enter such vessels they
cannot get away without the heat being absorbed by the water in. the boiler.
It should be stated that it has before been proposed to increase the heating
surfaces of boilers by the use of cups, the interiors of which do not increase
in diameter beyond the openings into them; and I would remark that my
improvements, as above stated, are not intended simply to increase the heating
surfaces of a boiler, but to retain the heated products of combustion within
the interior of the applied vessels, by having them of increased diameter within
as compared with the openings into them.
Having thus stated the nature of my Invention, I will proceed more fully
to describe the same.
DESCRIPTION OF THE DRAWING.
Figure 1 shews a vertical section, and Figure 2 shews a plan in section, of
a boiler constructed according to my Invention. I prefer in constructing
steam boilers that they should be of a cylindrical form and upright, but my
Invention may be applied in constructing other forms of boilers.
a, a, is the
boiler, which is set in brickwork; b, b, is the furnace or fire-place; c is a flue
or outlet to admit of the products of combustion which rise from the fire
passing to the flue d which surrounds the boiler, and from such flue d there is
a flue (not shewn in the Drawing) which conducts the products into the
chimney. There are vessels or chambers e, e, introduced into and fixed in the
boiler over the fire. It will be seen that the vessels or chambers e, c, are of
larger diameter above the entrances into them than they are at their entrances.
The form of the introduced vessels or chambers which I prefer is that shewn
in the Drawing, but the shape of the vessels or chambers may be varied,
provided the diameter of the vessels or chambers is larger above than the
diameter at the entrances into the chambers or vessels. By thus applying
vessels or chambers to steam boilers, the extent of heating surfaces will not
only be greatly increased, but the heated products of combustion having once
entered into the vessels or chambers e, e, they will not pass out therefrom, but
the heat thereof will be absorbed by the water surrounding such introduced
vessels or chambers.
Having thus described the nature of my said Invention, and the manner of

page_text: performing the same, I would have it understood that what I claim is, the
application to steam boilers of vessels or chambers e, e, of larger diameter
above than they are at the entrances into them, 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.B.)