AN IMPROVED METHOD OF MAKING STEAM BOILERS
Year: 1859

page_text: LETTERS PATENT to Nesserwanjee Ardaseer, British Subject, of Bombay,
East Indies, for the Invention of "AN IMPROVED METHOD OF MAKING
STEAM BOILERS."
Sealed the 8th November 1859, and dated the 1st July 1859.
PROVISIONAL SPECIFICATION left by the said Nesserwanjee Ardaseer at
the Office of the Commissioners of Patents, with his Petition, on the
1st July 1859.
I, NESSERWANJEE ARDASEER, British Subject, of Bombay, East Indies, do
hereby declare the nature of the said Invention for "AN IMPROVED METHOD OF
MAKING STEAM BOILERS," to be as follows, and consists in making boilers so
that the internal portions, such as the tubes or flues, can be easily removed
from the boilers for the purpose of cleaning, inspection, or repair.
By this Invention those parts of the side or end of the boiler carrying the
tube or tubes are not rivetted to the rest of the boiler, but are constructed so
as to be easily drawn out of or detached from the boiler with the tubes
attached. The ends or sides of the boiler are shaped so as to receive the end
plates or side plates carrying the tubes shaped to correspond therewith, so as
to produce with or without packing a suitable and perfect joint, and may be
kept steam-tight by means of clamps, screws, or bolts.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Nesserwanjee Ardaseer in the Great Seal Patent Office on the
30th December 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, NESSERWANJEE
ARDASEER, British Subject, of Bombay, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the First day of July, 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
me, the said Nesserwanjee Ardaseer, Her special licence that I, the said
Nesserwanjee Ardaseer, my executors, administrators, and assigns, or such
others as I, the said Nesserwanjee Ardaseer, 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 Inven-
tion for "AN IMPROVED METHOD OF MAKING STEAM BOILERS," upon the condition
(amongst others) that I, the said Nesserwanjce Ardaseer, my executors 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 Nesserwanjee Ardaseer, do hereby
declare the nature of my 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 relates to the construction of steam boilers in such manner
that the tubes and tube plates together may be easily withdrawn from the rest
of the boilers to facilitate inspection and repairs.
By my Invention the front and back tube plates, with the tubes attached,
are so shaped in accordance with the parts of the builer with which they are
associated, that by the pressure caused by screws or cotters and clamps there
is a perfect and steam-tight joint; and when examination is necessary, the
shell may be left undisturbed. Upon reference to the accompanying Drawings
my plan of constructing boilers will be readily seen.
Figure 1 is a longitudinal section of a stationary boiler. Figure 2 is a cross

page_text: section through the fire-box of the same. Figure 3 is a cross section through
the smoke box of the same. The tube plates a, a, and b, are levelled to fit
the adjoining parts of the boiler c, c, and d, d, and are so made that by aid of
the scrow f and clamp g the joints can be screwed together and made steam-
tight, or by reversing the screw the tubes, with the two tube plates attached,
can be forced away from the rest of the boiler through the fire-box, so that in
the shell there will be room to work, and the tubes will be exposed for
examination, for cleaning, or repairs.
For locomotive boilers I should recommend the plan as per Drawings
herewith. Figure 4 is a longitudinal section; Figure 5, a cross section
through the fire-box; Figure 6, a cross section through the smoke box ; and
Figures 7 and 8 are full-sized details of the fastening of the joint. The tube
plates and adjoining parts of the boiler are arranged as in the stationary boiler
already described, excepting that the conical or bevelled parts are so made as
to allow the tubes to be drawn out through the smoke box, allowing also the
fire-box and furnace bars to remain undisturbed, and that the screwing up is
differently arranged. For the latter purpose, instead of a longitudinal screw
and clamp, a ring is provided to cover the joint in the smoke box. This ring
is kept in its place by pressure from screws connecting it with another ring
fastened to the part of the boiler adjacent to the joint. By tightening up the
screws, the boiler is fit for work. If examination of the different parts be
required, by loosening the screws which fasten the ring, and removing the
ring, it will only require a little force to drag out the tube plates and tubes.
Modifications of the Invention may be used in marine boilers, but it is not
necessary to explain every variety of plan which may be adopted under this
Invention either with reference to them or in the case of locomotive or
stationary boilers.
.
Having now described the nature of my said Invention, and in what manner
the same is to be performed, I declare that I claim the use of conical joints
between the tube plates and the rest of the boiler kept steam-tight by
pressure.
In witness whereof, I, the said Nesserwanjee Ardaseer, have hereto set
my hand and seal, this Thirtieth day of December, One thousand
eight hundred and fifty-nine.
NESSERV NJEE ARDASEER.
(1-8.)