IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERSARA
Year: 1867

page_text: LETTERS PATENT to Charles Louis Joseph Carville, senior, of 2, Rue
Sainte Appoline, Paris (Empire of France), Mechanician, for the
Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS AND
Sealed the 29th November 1867, and dated the 3rd June 1867.
PROVISIONAL SPECIFICATION left by the said Charles Louis Joseph
Carville, at the Office of the Commissioners of Patents, with his
Petition, on the 3rd June 1867.
I, CHARLES LOUIS JOSEPH CARVILLE, senior, of 2, Rue Sainte Appoline,
Paris (Empire of France), Mechanician, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS
AND IN APPARATUS CONNECTED THEREWITH," to be as follows:-
My improvements in the construction of boilers comprise, first, the formation
of capacities or spaces of strong corrugated sheet metal so as to form vessels
or boilers affording a free circulation for water and the generation of steam,
as hereafter described. Second, the joining or uniting of the said corrugations
at certain distances. Third, the employment in steam boilers of vessels or
capacities made solely according to my Invention or in combination with
steam generators of ordinary construction. Fourth, an arrangement for supply-
ing heated water to steam boilers. Fifth, the production of superheated steam.
Sixth, the employment of valves, whereby the direction in which the heat
circulates may be regulated as required or desired.

page_text: The different parts of boilers made according to my Invention are formed
of two sheets of metal or of a single corrugated sheet and united in such
manner that the two cavities or hollows are opposite one another, and thus
form a capacity or boiler; and in order to maintain these parts at a desired
distance apart there are two projections or flanges opposite one another, which
are united by girders, bolts, or screws. To the ends of these boilers flanges
are fitted to form joints, united with plates of metal, and the ends of each
boiler are furnished with fastenings capable of being easily removed to clean
the interior. Steam boilers made in this manner may be used in combination
with those of ordinary construction, or they may be used alone. To super-
heat the steam I take it to the upper part of a dome, and I cause it to descend
and circulate in pipes placed at the side of the boiler, from whence the steam
issues perfectly dry and superheated; a portion of these pipes superheats the
steam, and the upper part heats the feed water. To direct the heat as
required from right to left. of the fire-place I mount on pivots bands of sheet
iron, divided into a certain number of parts, which when all are drawn down
close the flues; by raising or by opening more or less one or other of these
parts of sheet metal the heat may be directed into such part of the generator
as may be desired.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Louis Joseph Carville, in the Great Seal Patent
Office on the 3rd December 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
LOUIS, JOSEPH CARVILLE, senior, of 2, Rue Sainte Appoline, Paris (Empire
of France), Mechanician, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of June, in the year of our Lord One
thousand eight hundred and sixty-seven, in the thirtieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Charles Louis Joseph Carville, Her special licence that I, the said Charles
Louis Joseph Carville, my executors,administrators,and assigns, or such others
as I, the said Charles Louis Joseph Carville, 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

page_text: "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS AND IN APPARATUS
CONNECTED THEREWITH," upon the condition (amongst others) that I, the said
Charles Louis Joseph Carville, my executors or administrators, by an instru-
ment 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 im-
mediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Charles Louis Joseph Carville, 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, reference being had to the Drawings hereto
annexed, and to the figures and letters marked thereon, that is to say :-
My improvements in the construction of steam boilers comprise, first, the
formation of capacities or spaces of strong corrugated sheet metal so as to
form vessels or boilers, affording a free circulation for water and the genera-
tion of steam, as hereafter described. Second, the joining or uniting of the said
corrugations at certain distances. Third, the employment in steam boilers of
vessels or capacities made solely according to my Invention or in combination
with steam generators of ordinary construction. Fourth, an arrangement for
supplying heated water to steam boilers. Fifth, the production of super-
heated steam. Sixth, the employment of valves whereby the direction in
which the heat circulates may be regulated as required or desired.
.
The different parts of boilers made according to my Invention are formed of
two sheets of metal or of a single corrugated sheet, and united in such manner
that the two cavities or hollows are opposite one another, and thus form a
capacity or boiler; and in order to maintain these parts at a desired distance
apart there are two projections or flanges opposite one another, which are
united by girders, bolts, or screws. To the ends of these boilers flanges are
fitted to form joints united with plates of metal, and the ends of each boiler
are furnished with fastenings capable of being easily removed to clean the
interior. Steam boilers made in this manner may be used in combination
with those of ordinary construction, or they may be used alone. To super-
heat the steam I take it to the upper part of a dome, and I cause it to
descend and circulate in pipes placed at the side of the boiler from whence
the steam issues perfectly dry and superheated. A portion of these pipes
superheats the steam, and the other part heats the feed water. To direct
the heat as required from right to left of the fire-place I mount on pivots
bands of sheet iron divided into a certain number of parts, which when all

page_text: are drawn down close the flues; by raising or by opening more or less one
or other of these parts of sheet metal the heat may be directed into such
part of the generator as may be desired.
The accompanying Drawings are views of a steam boiler constructed
according to my Invention.
Figure 1 is a front view, partly in section; Figure 2 is a horizontal section;
and Figure 3 is a section taken through Figure 1; Figures 4, 5, and 6 are
views of parts in detail, showing how I apply the corrugated sheet metal.
The capacities, spaces, or boilers are formed by the undulations of two
sheets of metal a and b united by rivets c; the sheets a and b are maintained
at an even distance apart by girders e, through which bolts for screwsg pass;
but between these girders liquid and gases are free to circulate; therefore it
will be understood that this new construction of boiler may be employed alone
or in combination with boilers of known constructions. The ends of the
sheets a and b have their edges flanged, as at a¹, Figure 2, so that they may
be rivetted on to plates h, which opposite the spaces or boilers have apertures
formed therein, closed by fastenings. It must be understood that these spaces
or boilers may be formed of two or several sheets of metal according to their
size; in the latter case the sheets would be laid.on one another, employing,
for example, one of the arrangements shown at Figures 8, 9, & 10. By
this arrangement I obtain boilers the elements of which necessitate that all
the parts shall be perfectly united, are easy of access for cleaning, in which
the water and gases circulate freely, and enable me to obtain in a small
space a considerable heating surface.
The boiler shown at Figures 1, 2, and 3 is composed of elements which
I have just mentioned; the undulating or corrugated sheets i form the boilers
where the production of steam is very rapid, and which is in a direct com-
munication with the large reservoir; by means of bent pipes k placed outside
the boiler. This arrangement while assuring the perfect communication of
all the capacities or spaces with one another has the advantage of being visited
and cleaned in every part with the greatest facility. To obtain the supply
with warm water I bring it by a pipe / running along a side of the outside of
the boiler; it is the same for the steam, which I always take to the upper
part, and into the pipe m, where it is superheated before passing to the
engine or otherwise. In order to profit by the waste heat I have made
behind the stove a cylindrical space o communicating with the lower
capacities or spaces formed by the corrugated sheets, whereby the tem-
perature of the water contained therein is in some measure raised.
To direct the circulation of the heat I arrange on each side of the furnace

page_text: valves n made of sheet metal or cast iron mounted on pivots to the right and
left of the fire-place, and divided into a certain number of parts, the rods of
which extend outside the boiler in order to be able to work them easily,
these valves being brought down close the flues, and it is sufficient to raise or
to open more or less one or other of them to direct the heat into such part of
the furnace as may be desired. This new combination can be usefully
employed for locomotives on railways, ordinary roads, and other purposes.
It is to be further understood that these applications may be made to
fixed generators, the boilers of which can be replaced by my capacities
with undulating surfaces, and that I can make with these elements boilers
of different power and size, varying the number and size of the spaces com-
posing the boiler.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I do not limit myself to
the precise form and arrangements herein-before given, nor to the precise
method of applying the same, as in some cases variations may be made without
departing from the essential features of the Invention; but I claim,―
First, the arrangement or arrangements of undulating or corrugated
sheets of metal in such manuer as to form spaces or boilers, the two sides
of which are maintained at a suitable distance in the nearest parts to allow
of the circulation of water and steam, all substantially as herein-before
described and illustrated in the accompanying Drawings.
Second, the employment of a series of tubes for supplying heated water
and superheated steam, substantially as herein-before described.
Third, the arrangement of valves for directing the circulation of the heat,
substantially as herein-before described.
Fourth, the combination of boilers made, as before described, with boilers
of ordinary known forms or construction.
In witness whereof, I, the said Charles Louis Joseph Carville, have
hereunto set my hand and seal, this Twenty-sixth day of November,
C. CARVILLE, AINE. (L.S.)