IMPROVEMENTS IN APPARATUS FOR SUPERHEATING STEAM
Year: 1862

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of "IMPROVEMENTS
IN APPARATUS FOR SUPERHEATING STEAM."-A communication from abroad
by Pierre Antoine Delafond and Joseph Corrade, both of Marseilles,
France.
Sealed the 31st October 1862, and dated the 2nd May 1862.
PROVISIONAL SPECIFICATION left by the said Richard Archibald Brooman
at the Office of the Commissioners of Patents, with his Petition, on the
2nd May 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 APPARATUS FOR SUPERHEATING STEAM," (communicated to
me from abroad by Pierre Antoine Delafond and Joseph Corrade, both of
Marseilles, France,) to be as follows:-
This Invention of apparatus for superheating steam consists of cast-iron
hollow rings, by preference three each, divided into four equal segments; the
rings are of different diameters, and are placed stepwise one above the other,
and at such distances apart as will allow the products of combustion free cir-
culation; connection is maintained between the rings by bent tubes. The
first of these hollow rings is of the same internal diameter as the flue in which
the superheater is placed. When the superheater is fitted to a marine engine

page_text: steam enters directly from the boilers, and passes to the cylinders. Valves for
cutting off and admitting the steam are fitted so as to enable the steam to pass
directly from the boilers to the cylinders in the ordinary manner without
passing through the superheater, and also to enable part of the steam only to
pass through the superheater, and be afterwards mixed with moist steam.
Each tube is free to expand and contract independently of the others, and bas
only to bear its own pressure and that on the ring. This result is obtained by
the tubes being bent, which renders them slightly elastic, and allows them to
play without injuriously affecting their joints. The form of the tubes may
vary, and from their position the form and position of the compartments
between which the bent tubes form a communication may also vary; thus,
instead of the two neighbouring compartments of the same ring communicating,
they may form a communication between two vessels of any form, separated or
contiguous, one receiving steam from the boiler, the other dry steam through
the superlicater.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filel
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 1st November 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 16G, 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 Second day of May, in the year of our Lord One
thousand eight hundred and sixty-two, in the twenty-fifth 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, 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 APPARATUS FOR SUPERHEATING STEAM," (communicated to me
from abroad by Pierre Antoine Delafond and Joseph Corrade, both of
Marseilles, France,) upon the condition (amongst others) that I, the said
Richard Archibald Broomau, my executors or administrators, by an instru-

page_text: ment in writing under my, or their, or one of their bands 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 manuer 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 of apparatus for superheating steam consists of cast-iron
hollow rings, by preference three, each divided into four equal segments; the
rings are of different diameters, and are placed stepwise one above the other,
and at such distances apart as will allow the products of combustion free cir-
culation; connection is maintained between the rings by bent tubes. The
first of these hollow rings is of the same internal diameter as the flue in which
the superheater is placed. When the superheater is fitted to a marine engine
steam enters directly from the boilers and passes to the cylinders. . Valves for
cutting off and admitting the steam are fitted so as to enable the steam to pass
directly from the boilers to the cylinders in the ordinary manner, without
passing through the superheater, and also to enable part of the steam only to
pass through the superheater & be afterwards mixed with moist steam.
Each tube is free to expand and contract independently of the others, and has
only to bear its own pressure and that on the ring. This result is obtained by
the tubes being bent, which renders them slightly elastic, and allows them to
play without injuriously affecting their joints. The form of the tubes may
vary, and from their position the shape and position of the compartments
between which the bent tubes form a communication may also vary; thus,
instead of the two neighbouring compartments of the same ring communicating,
they may form a communication between two vessels of any form, separated or
contiguous, one receiving steam from the boiler, the other dry steam through.
the superbeater.
Figure 1 of the accompanying Drawings is a sectional elevation, and
Figure 2 is a horizontal section of an apparatus for superheating steam
constructed according to this Invention. One-half of the apparatus shows the
bent tubes, the other half shows the rings only with their connections.
a, a', a², are the rings, each divided into four equal segments; b, b, are joints
uniting the rings, and at the same time tending to support them. The first
ring, which is of the same diameter as the funnel f, is supported by a girder c.

page_text: The series of opposed segments is placed crosswise in a steam vessel, supposing
the apparatus to be fitted thereto, and receives steam direct from the boilers
on two sides. The two other series are placed longitudinally, and convey
steam to the cylinders. e, e, are the syphon tubes for forming a communi-
cation between the inlet and outlet segments. Supposing the number of the
syphon tubes to be 48, the sum of their section would be equal to the section
of the steam pipe. They extend a short distance up the funnel, the diameter
of which in that part is somewhat enlarged. h, h, are the valves for cutting
off or admitting the steam to and from the superheater. The apparatus is
placed at the base of the funnel, and may receive steam from several boilers.
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 the employ-
ment in apparatuses for superheating steam of metal rings placed stepwise
one above the other, and united by bent tubes, substantially as herein-before
described and illustrated in the accompanying Drawings.
In witness whereof, I, the said Richard Archibald Brooman, have here-
unto set my hand and seal, this First day of November One thou-
sand eight hundred and sixty-two.