IMPROVEMENTS IN STEAM BOILERS
Year: 1875

page_text: LETTERS PATENT to George Hunter, of Leeds, in the County of York,.
for the Invention of "IMPROVEMENTS IN STEAM BOILERS."
Sealed the 21st September 1875, and dated the 24th March 1875.
PROVISIONAL SPECIFICATION left by the said George Hunter at the
Office of the Commissioners of Patents, with his Petition, on the
24th March 1875.
I, GEORGE HUNTER, of Leeds, in the County of York, do hereby
3 declare the nature of the said Invention for "IMPROVEMENTS IN STEAM
BOILERS," to be as follows:-
The object of my Invention is to prevent the accumulation of mud,
scale, or other foreign substances in boilers, and is particularly applic-
able to boilers fired underneath, but may also be applied to other boilers
having internal tubes or flues.
For the above purpose I provide and attach a series of pipes to the
bottom of the boiler, or at such places to which the sediment, mud, or
scale usually falls and accumulates.
:

page_text: In upright boilers, being egg shaped at the bottom, only one central
pipe is required. Into this series of pipes the sediment, scale, or mud
passes. The pipes may be connected and provided with a blow-off cock
or blow-off cocks, through which the accumulated scale, mud, or other
foreign matter is blown off when required.
By the above arrangements the plates are continually clean and free
for transmitting the heat to the water, and the burning of the plates is
also prevented; and in all cases the safety of the boiler is more
effectually secured and economy of fuel effected.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Hunter in the Great Scal Patent Office
on the 23rd September 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HUNTER, of Leeds, in the County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of March, in the year
of our Lord One thousand eight hundred and seventy-five, in the thirty-
cighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said George Hunter, Her special licence,
that I, the said George Hunter, my executors, administrators, and
assigns, or such others as I, the said George Hunter, 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
STEAM BOILERS," upon the condition (amongst others) that I, the said
George Hunter, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and scals, should par-
ticularly 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.

page_text: Figure 1 is a longitudinal section; Figure 2, an end elevation of the

page_text: scale usually falls and accumulates. The herein-before mentioned pipes
or tubes a may be employed to almost all kinds of boilers.
In upright boilers which are egg shaped at the bottom only one
central pipe is required. The pipes or tubes a may be connected
together by means of the horizontal pipe or tube d and provided with
a blow-off cock at the end e of the smaller pipe or tube f, which is
employed to convey away (from the horizontal pipe or tube d) the
accumulated scale, mud, or other foreign substance.
By the above arrangement the plates at the bottom of the boiler bare
continually kept clean and free for transmitting the heat to the water,
and the burning of the plates is also prevented.
The arrangement of boiler shewn on Drawings is provided with the
fire-box or furnace c below the boiler.
Having now described the nature of my said Invention, and shewn
by Drawings how the same may be carried into practice, I would have
it understood that I do not limit myself to the exact limits, details, or
configuration of the parts I have explained and shewn, as the same may
be varied or modified without departing from the nature or principle of
my Invention; but what I do claim and desire to be secured to me by.
Letters Patent is, the arrangement and application of pipes or tubes a,
and parts connected therewith, to and in combination with steam boilers,
substantially as and for purposes herein set forth.
In witness whereof, I, the said George Hunter, have hereunto
set my hand and scal, this Twenty-first day of September, in
the year of our Lord One thousand eight hundred and seventy-
five