IMPROVEMENTS IN APPARATUS FOR SUPERHEATING STEAM
Year: 1859

page_text: LETTERS PATENT to John Boden, of Portswood Road, Southampton, Engi-
neer, and William Clark, of Northern Road, Southampton, aforesaid,
Boiler Maker, for the Invention of "IMPROVEMENTS IN APPARATUS FOR
SUPERHEATING STEAM."
Sealed the 29th September 1859, and dated the 25th June 1859.
PROVISIONAL SPECIFICATION left by the said John Boden and William
Clark at the Office of the Commissioners of Patents, with their Petition,
on the 25th June 1859.
We, JOHN BODEN, of Portswood Road, Southampton, Engineer, and
WILLIAM CLARK, of Northern Road, Southampton, aforesaid, Boiler Maker, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
APPARATUS FOR SUPERHEATING STEAM," to be as follows:-
This Invention consists of certain mechanical arrangements, by which the
steam of marine and other boilers is superheated in a more speedy and effi-
cient manner than heretofore, at the same time economizing the consumption
of fuel to a considerable extent, as follows:-We propose using a number of
metallic tubes and plates, and placing them in such a position as not to
interfere with the other tubes or flues in the boiler; and also to construct
and fix them to suit any kind of boiler, so as to increase the area of heating
surface to a great extent, which is a great desideratum, especially in marine
boilers. In order to attain our object, we employ a feed-water apparatus,

page_text: having a number of metallic tubes in connection with the furnace, fixed so as
to receive the water from the feed pumps, which water is caused to travel
forwards and backwards through the entire length of the tubes; said tubes
being placed in the strongest heat, thereby increasing the temperature of the
feed water to 212°, or boiling point, prior to its entering the boiler, conse-
quently economizing the consumption of fuel. One particular advantage in
this arrangement being the easy access to all parts of the apparatus for
cleaning and repairing when required.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Boden and William Clark in the Great Seal Patent
Office on the 24th December 1859.
. TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
BODEN, of Portswood Road, Southampton, Engineer, and WILLIAM CLARK, of
Northern Road, Southampton, aforesaid, Boiler Maker, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of June, in the year of our Lord One
thousand eight hundred and fifty-nine, in the twenty-third year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto us, the said
John Boden and William Clark, Her special licence that we, the said
John Boden and William Clark, our executors, administrators, and
assigns, or such others as we, the said John Boden and William Clark,
our 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," upon the condition (amongst others) that we, the
said John Boden and William Clark, our executors or administrators, by
an instrument in writing under our or their hands and seals, or under the
hand and seal of one of us or them, 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 we, the said John Boden and William Clark, do
hereby declare the nature of the said Invention, and in what manner the

page_text: same is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say:-
This Invention consists of certain mechanical arrangements by which the
steam of marine and other boilers is superheated in a more speedy efficient
manuer than heretofore, at the same time economizing the consumption of fuel
to a considerable extent, as follows:-We propose using a number of metallic
tubes and plates, and placing them in such a position as not to interfere with
the other tubes or flues in the boiler; and also to construct and fix them to
suit any kind of boiler, so as to increase the area of heating surface to a great
extent, which is a great desideratum, especially in marine boilers. In order
to attain our object we employ a feed-water apparatus, having a number of
metallic tubes in connection with the furnace, fixed so as to receive the water
from the feed pumps, which water is caused to travel forwards and backwards
through the entire length of the tubes; said tubes being placed in the
strongest heat, thereby increasing the temperature of the feed-water to 212°, or
boiling point, prior to its entering the boiler, consequently economizing the
consumption of fuel. One particular advantage in this arrangement being the
easy access to all parts of the apparatus for cleaning and repairing when
required. In order to explain our said Invention as completely as possible,
we now proceed to describe the best means we are acquainted with for
carrying the same into practical effect, reference being had to the illustrative
Sheet of Drawings hereunto annexed, and to the numeral figures and letters
of reference marked thereon respectively, as follows:-
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section of a tubular boiler, with apparatus for super-
heating steam, and apparatus for heating the feed water attached and fixed
in the smoke space and up-take; Figure 2 is a cross section of Figure 1; and
Figure 3 is a plan view of the same, partly in section. Similar letters of
reference denote corresponding parts where such parts appear, or can be seen
at each of such said Figures respectively. a, a, are the furnaces; b, the back
smoke box; c, the tubes; d, the front smoke box or smoke space; e, the
up-take leading into the chimney; f, the steam-chest; g, the steam pipe for
conducting the steam from the steam chest into the superheating apparatus ;
h, the pipe of the apparatus; i, a thin steam space for conducting the steam to
the bottom of the apparatus, where it is then divided amongst the tubes, and
ascends to the top of the apparatus, having been superheated in the passage
from bottom to top, whence it is conveyed to the engines through the steam-
pipe k, after being superheated; j, j, are the tubes in the apparatus through

page_text: which the hot gases from the boiler tubes rise and pass through before
escaping to the funnel. Therefore we employ for heating the feed water and
superheating the steam what heat would otherwise pass away as waste up
the funnel. is a pipe for receiving the water from the feed pump, after
which it ascends to the pipes m, m, and caused to travel forwards and back-
wards the entire lengths of the tubes, and finally descends by the pipe n,
through the pipe o, into the boiler at the temperature of about 212°, or
boiling point.
Having now fully described the nature and object of our said Invention of
Improvements in Apparatus for Superheating Steam," and the manner in
which the same is to be performed, we would remark, in conclusion, that we
do not confine ourselves to the number of tubes to be used, nor the precise
details herein described and shewn by the accompanying Drawings, nor do
we claim the placing of water pipes in front of the boiler tubes, as we are
aware the same has before been done, but not in the manner in which we place
them, our water pipes not being one above another in front of the tubes, but
all above the boiler tubes, as shewn at Figures 1 and 2, whereby they are
encompassed by the extreme heat of the combined flues; neither do we claim
or confine ourselves to use the combination of the pipes 9, 9, with the water-
pipes m, m, as they can be used separately, as may be required; but what we
claim as our Invention intended to be secured to us by the herein in part
recited Letters Patent, is the placing of pipes in the up-take, and other pipes
above the ends of the boiler tubes, in the manner exhibited in the accom-
panying Sheet of illustrative Drawings, and for the purposes herein fully
described and set forth.
In witness whereof, we, the said John Boden and William Clark, have
hereunto set our hands and seals, this Twentieth day of December,
in the year of our Lord One thousand eight hundred and fifty-nine.
(L.S.)
WILLIAM CLARK. (L.S.)
Witness,
ALEX. PRINCE, Agent for Patents,
4, Trafalgar Square, Charing Cross.