IMPROVEMENTS APPLICABLE TO STEAM BOILERS
Year: 1869

page_text: LETTERS PATENT to William Arnold, of Barnsley, in the County of
York, Engineer, and William Carnelley, of Fallowfield, near Man-
chester, in the County of Lancaster, Warehouseman, for the Inven-
tion of "IMPROVEMENTS APPLICABLE TO STEAM BOILERS."
Sealed the 1st January 1870, and dated the 7th July 1869.
PROVISIONAL SPECIFICATION left by the said William Arnold and
William Carnelley at the Office of the Commissioners of Patents,
with their Petition, on the 7th July 1869.
We, WILLIAM ARNOLD, of Barnsley, in the County of York, En-
gineer, and WILLIAM CARNELLBY, of Fallowfield, near Manchester, in
the County of Lancaster, Warehouseman, do hereby declare the nature
of the said Invention for "IMPROVEMENTS APPLICABLE TO STEAM BOILERS," to
be as follows:-
Our Invention refers to arrangements capable of being adapted to
existing boilers, and whereby the products of combustion arising from
one fire-place are caused at pleasure to pass over another, so that the
said products from newly fed fuel travel in contact with a highly heated

page_text: mass, by which the smoke is consumed. We will in the first place
illustrate our Invention by pointing out an arrangement we propose for
ordinary two-flued boilers. We connect the two fire-places of the flues
or tubes by a transverse chamber, and behind the bridge we adapt
dampers or doors, so that when one of these is closed the products of
combustion pass along the said chamber to the other fire place, and from
thence to its flue, and thus the products of combustion may be caused
to travel transversely in either direction, but we also propose an arrange-
ment by which the said products after passing over the highly heated
mass are caused to traverse both flues. For this purpose we place two
other dampers or doors behind those above alluded to, and a second
chamber which connects the two flues. By placing these dampers at
an angle so that they do not close the flues a portion of the products of
combustion passes directly onward, and another portion becomes deflected
and is caused to travel along the cross chamber to the other flue, but
if desired the whole may pass along one flue only by closing one of
the dampers or doors. If however a constant arrangement be desired
the dampers or doors may be replaced by fixed projections, and these
may be water chambers.
In applying our Invention to boilers in which the fire places discharge
their products into one flue, the first-mentioned dampers and cross
chamber only will of course be required, and in reference to boilers
which are fired beneath we divide the fire-place (if it be not so made)
by a brick or other partition or water chamber, but with a communi-
cation from one to the other, and adapt dampers or doors to change the
current as above described.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Arnold and William Carnelley in the
Great Seal Patent Office on the 7th January 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM 3
ARNOLD, of Barnsley, in the County of York, Engineer, and WILLIAM
CARNELLEY, of Fallowfield, near Manchester, in the County of Lancaster,
Warehouseman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of July, in the year of 3

page_text: our Lord One thousand eight hundred and sixty-nine, in the thirty-third
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto us, the said William Arnold and William Carnelley, Her
special license that we, the said William Arnold and William Carnelley,
our executors, administrators, and assigns, or such others as we, the
said William Arnold and William Carnelley, our 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 ex-
pressed, 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 APPLICABLE
TO STEAM BOILERS," upon the condition, amongst others, that we, the said
William Arnold and William Carnelley, by an instrument in writing
under our hands and seals, or under the hand and seal of one of us,
should particularly describe and ascertain the nature of the said In-
vention, 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 William Carnelley, do hereby
declare the nature of our said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement and accompanying Drawings (that
is to say):
Our improvements refer to arrangements capable of being adapted
to existing boilers, and whereby the products of combustion arising from
one fire-place are caused at pleasure to pass over another, so that the
said products from newly fed fuel travel in contact with a highly
heated mass, by which the smoke is consumed.
In the accompanying Drawings Figs. 1, 2, 3, and 4 represent our
improvements adapted to a two-flued boiler of ordinary construction,
Fig. 1 being a plan view, partly in section; Fig. 2, a vertical section
taken through one of the fire-places and its flue; Fig. 3, an end view
of Fig. 1; and Fig. 4, a vertical section. The shell of the boiler is shewn
at a, the two flues at b, c, and the fire-places at d, e. Upon a dead
plate f behind the fire-bars we build up fire-brick, as shewn at g, leaving
an aperture between each fire-place and flue, as at h, i. These apertures
are provided with doors or dampers k, l, turning upon centres m, it,
and have arms o, p, on the other side of the said centres to which

page_text: rods q, r, are connected. These rods pass to the front of the boiler,
extending along the ash-pit, and are then connected to levers 8, t,
turning upon centres n, o. By these levers therefore the fireman may
open or close the doors or dampers k, l, at pleasure. At wo is a tube
situate in front of the fire-places and opening a communication between
one flue and another, as at x, which shows the passage leading from the
fire-placed to the other e. A y is another tube, which in like manner
establishes a communication between the flue band the other c, the
opening z shewing the passage from the former to the latter, or it may
be vice versa in the cases of both of these tubes. According to the
positions of the parts shewn in the Drawing the firing is supposed to have
recently taken place cn the bars e, the other bars d containing fuck
which has been partly burnt and in an incandescant state. The un-
consumed products of combustion in the fire-place e cannot escape
directly through the flue, as the door or damper is closed, they there-
fore fall back and are drawn by the draught through the opening
and tube w into the other fire place d, where they meet with the highly
heated fuel and become burnt, after which they pass with the other
products of combustion through the open doorway to the flue 6 and
from thence to the chimney in the ordinary manner. According how-
eyer to the position in which the door or damper k is shewn they will
be deflected on issuing through the passage h, and a portion will pass
through the tube y into the flue c, and the quantity so transferred may
be regulated by altering the position of the said door or damper. When
it is desired to feed the fire-place e the fireman turns the lever & upon
its centre so as to close the door k and open the other door by means
of the lever t, the fire-place relating to which now contains highly
heated fuel, and the operation will then be the reverse of that above
described, the unconsumed products of combustion passing from the
It has
fire-placed through the opening to the other fire-place e.
been stated that a portion of the products of combustion are deflected
so as to pass from the one flue 6 to the other c, and that the amount
of this portion may be varied by altering the angle of the door or
damper, but by fully opening it the whole may be practically passed
through one flue. There are, as is well known, some hoilers with two
fire-places which discharge their products of combustion into one flue
in which cases it will be obvious that there is no tube like that shew
at y, for it is only necessary to consider the two flues b, c, merged into
one behind the doors or dampers k, l. In these cases the operation

page_text: will be the same as that above described, excepting that each door or
valve must of necessity discharge the products into one flue. Figs. 5, 6,
7, 8, represent our Invention adapted to a boiler which is fired beneath.
In these cases if there be not already two separate fire-places, we alter
them into that arrangement by building a wall between them, as at a,
with an opening at the front forming a communication from the one
fire-place to the other, and across the two fire-places we build a wall c
provided with openings d, e, which are capable of being opened or closed
by doors or dampers f, g. These doors and dampers communicate by
rods h, i, with levers k, l, and by which means they may be regulated
as in the former instances, the operation being precisely the same. I
have shewn the parts g of Figs. 1, 2, and c of Figs. 5, 6, constructed
of brickwork, but they may be made as water chambers communicating
with the boiler in any convenient manner.
Having thus described and ascertained the nature of our said In-
vention, and the manner in which the same is to be performed, I desire
it to be understood that we do not claim the principle of transferring
undecomposed products of combustion from one fire-place to another;
but we claim as secured to us under the above in part recited Letters
Patent, the arrangements above shewn and described whereby the parts
required for a transference of the products of combustion from newly
fed to highly heated fuel are contained within the ordinary limits of the
boiler or its setting.
In witness whereof, I, the said William Carnelly, have hereunto
set my hand and scal, this Sixth day of January, in the year
of our Lord Qne thousaud eight hundred and seventy.
W. CARNELLEY. (L.S.)