IMPROVEMENTS IN TUBULAR BOILERS, CONDENSERS, AND SUPERHEATERS
Year: 1862

page_text: Sealed the 15th May 1863, and dated the 19th November 1862.
PROVISIONAL SPECIFICATION left by the said Richard Archibald
Brooman at the Office of the Commissioners of Patents, with his Petition,.
on the 19th November 1862.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN TUBULAR BOILERS, CONDENSERS, AND SUPERHEATERS," (com-
municated to me from abroad by Pierre Antoine Delafond and Joseph
Corradi, of Marseilles, France,) to be as follows:-
This Invention consists in the employment in boilers, condensers, and super-
heaters of helical instead of straight tubes. The tubes may have one or more
turns in their length. The Invention also consists in obtaining similar effects
in straight tubes to those resulting from the employment of helical tubes, by
fixing therein or thereon screw or twisted vanes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 19th May 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Nineteenth day of November, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Richard Archibald Brooman, Her special licence that I, the said Richard
Archibald Brooman, my executors, administrators, and assigns, or such
others as I, the said Richard Archibald Brooman, my executors, adminis-
trators, 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 TUBULAR BOILERS, CONDENSERS,
AND SUPERHEATERS," (communicated to me from abroad by Pierre Antoine
Delafond and Joseph Corradi, of Marseilles, France,) upon the condition
(amongst others) that I, the said Richard Archibald Brooman, my ex-
ecutors 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 Richard Archibald Brooman, 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, reference being had to the Drawings hereunto
annexed, that is to say :-
This Invention consists in the employment in boilers, condensers, and super-
heaters of helical instead of straight tubes. The tubes may have one or more
turns in their length. The Invention also consists in obtaining similar effects
in straight tubes to those resulting from the employment of helical tubes, by
fixing therein or thereon screw or twisted vanes.
In boilers however in which the products of combustion pass inside the

page_text: tubes such vanes will not be applicable, because not being in contact with water
they would be rapidly consumed; they apply however in condensers and super-
heaters, and may also be used in boilers with vertical tubes, round the outside
of which the gases and products of combustion pass.
Figure 1 of the accompanying Drawings is a longitudinal section, and
Figure 2 an end view of a tube constructed according to this Invention having
a single spiral; Figures 3 and 4 are corresponding views of a tube with a double
spiral.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim,-
First, the employment in boilers, condensers, and superheaters of helical
instead of straight tubes.
Second, the employment in boilers, condensers, and superheaters of tubes
having screw or twisted vanes fixed therein or thereon.
In witness whereof, I, the said Richard Archibald Brooman, have here-
unto set my hand and seal, this Nineteenth day of May, One thousand
eight hundred and sixty-three.