IMPROVEMENTS IN THE CON- .STRUCTION OF FURNACES
Year: 1865

page_text: LETTERS PATENT to Peter Young, of Manchester, in the County of
Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN THE CON-
.STRUCTION OF FURNACES."
PROVISIONAL SPECIFICATION left by the said Peter Young at the
Office of the Commissioners of Patents, with his Petition, on the 29th
May 1865.
I, PETER YOUNG, of Manchester, in the County of Lancaster, Engineer, do
5 hereby declare the nature of the said Invention for "IMPROVEMENTS IN THE
CONSTRUCTION OF FURNACES," to be as follows:-
: This Invention relates to certain improvements in the construction and
arrangement of furnaces applied to steam boilers, which are provided with
two or more flues. A box formed of cast iron or other suitable material is
fixed upon the end of the boiler over the fire-doors, the same being open to
and communicating with each of the fire-boxes and flues. The effect of such
: arrangement is, by means of the mode of procedure herein-after mentioned, to
obtain complete combustion of the fuel employed.
Assuming that there are two furnaces with their accompanying flues, the
method of proceeding is as follows:-Upon firing, the fire-door of one furnace
should be opened and its damper closed, the damper of the other furnace
being opened: The "green" smoke is thus compelled to return from the first-
mentioned furnace through the said external box, and is impelled over the

page_text: incandescent fuel of the furnace secondly mentioned. The operation is then
reversed, the fire-doors and dampers of the respective furnaces being alternately
actuated as above described as long as and whenever needed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Peter Young in the Great Seal Patent Office on the 29th
November 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
YOUNG, of the City of Manchester, in the County of Lancaster, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of May, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-eighth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Peter Young, Her special license that I, the said Peter Young,
my executors, administrators, and assigns, or such others as I, the said Peter
Young, 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 THE
CONSTRUCTION OF FURNACES," upon the condition (amongst others) that I, the
said Peter Young, 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 Peter Young, do hereby declare the
nature of my said Invention, and in what manner the same is to be per
formed, to be particularly described and ascertained in and by the following
statement:-
This Invention has for its object the consumption of smoke and economisation
of fuel in double flued steam boiler furnaces, and consists in feeding each furnace
separately, and causing the smoke which is evolved in large quantities when
the furnaces are fed with a fresh supply of fuel to pass over the neighbouring
red hot fire, until such newly fed fuel becomes incandescent, when the smoke:

page_text: which will then be trifling and small in quantity, or other product of com-
bustion may be turned into the usual channel. of escape, viz., the flue
immediately in connection with such furnace; the effect of passing the smoke
over the neighbouring red hot fire or furnace will be that such smoke is con-
sumed or turned into gas, which becoming ignited produces a considerable
amount of heat that would have been entirely lost if such smoke had been
allowed to escape in an unconsumed state into the atmosphere.
The mode of performing my Invention is as follows:-I construct a metallic
enclosed casing to be applied to the front of double flued steam boilers, which
shall extend from the outer side of one furnace to the outerside of the other
furnace, upon the front of which casing I swing the furnace doors, and such
casing forms a connection between the furnaces, through which, at the pleasure
of the stoker the smoke generated in either of the furnaces may be compelled
to pass to the other furnace by closing the damper of either of the flues, and
as the smoke will then travel over a highly heated fire the consequence is
that previous to arriving at the flue of the neighbouring furnace, such smoke
will be consumed, and thus a greater amount of heat will be produced from
3 given quantity of fuel, in virtue of the smoke being turned into ignited gas
instead of escaping in an unconsumed state into the atmosphere.
That this my said Invention may be the more readily seen and understood,.
I have hereunto annexed a Drawing illustrative of two modifications of my
improvements applicable to double flued steam boiler furnaces, like letters and
figures marked thereon being used to denote similar parts.
Fig. 1 is a side sectional view, Fig. 2 an exterior end view, and Fig. 3 is a
sectional plan of a double flued steam boiler, having one modification of my
improvements applied thereto; Fig. 4 is a sectional plan of a double flued
steam boiler, having another modification of my improvements applied.
thereto.
In Figs. 1, 2, 3, and 4, A represents the boiler constructed with a right--.
handed flue B, and left-handed flue C; D being the furnace of the right-
handed flue, and E the furnace connected with the left-handed flue.
F represents the metallic casing constructed of cast or wrought iron, secured.
to the front of the boiler by rivets, bolts, or set screws, which casing connects
the right and left handed furnaces together. The door G of the right-handed
furnace is swung upon the front of the casing F at the right-hand side, and
the door H of the left-hand furnace (shewn open in Figs. 3 and 4) is swung.
to the left of the front of the casing.
In feeding a boiler having my improvements applied thereto, it is necessary
to see that the damper of the flue connected with the furnace which is being

page_text: fed is closed; such being the case, and the fresh fuel supplied, the smoke
evolved will be compelled to pass through the casing into the neighbouring
furnace.
.
I will now proceed to describe the mode of using my Invention as illustrated
by the Drawing. Supposing that there is a bright red fire in the furnace D,
and that the fire is low in the furnace E, it is first necessary to close the
damper of the flue C, and then to charge the furnace E with the' requisite
amount of fuel; dense volumes of smoke will at once be generated, which
having no passage through the flue C, will be compelled to pass through the'
casing F, thence over the fire in the furnace D, and the products of combustion
which remain will pass through the flue B into the chimney shaft.
The arrows represent the direction in which the smoke would travel when'
it is necessary to consume the smoke evolved in the furnace E; but it will be'
readily understood that by closing the damper of the flue B, the smoke from
the furnace D will pass through the casing F into the furnace E, and therefore
by using the casing F and feeding the furnaces alternately the greater portion
of the smoke will be consumed and the fuel economised to a large extent.
When the fresh fuel has arrived at an incandescent or red hot state the damper
may be opened, and thus allow the product of combustion to pass through the
ordinary flue.
It will be readily apparent that this Invention is designed more particularly
for the purpose of consuming the dense volumes of smoke which are evolved
when a steam boiler furnace is fed with fresh fuel, and that a considerably
greater amount of heat will be produced from a given quantity of fuel than
would have been the case if the smoke had been allowed to escape in an
unconsumed state into the chimney.
:
I may be here allowed to state that the more perfect and air-tight the
damper is when closed, the more effectually will this Invention be found to
work.
The modification illustrated by Fig. 4, only differs from that illustrated by
Figs. 1, 2, and 3, in the shape of the casing F, which in this view (Fig. 4) is
arranged to produce a wider passage for the smoke.
Having now particularly described the nature of this my said Invention,
together with the best method with which I am acquainted for carrying the
same into practical effect, I wish it to be distinctly understood that I do not
confine myself to the precise details, relative proportions, or dimensions herein-
before described, as the same may be considerably varied without departing
from the Invention; but what I claim is, the use and application to double
flued steam boiler furnaces of a wrought or cast iron metallic casing, upon the

page_text: front of which casing the furnace doors are swung, and through which casing
the smoke generated in either furnace may be passed to the other furnace,
and there be consumed as herein-before described and fully set forth, or any
mere modification of the same.
In witness whereof, I, the said Peter Young, have hereunto set my
hand and affixed my seal, this Twenty-eighth day of November, in
the year of our Lord One thousand eight hundred and sixty-five.
Witness,
JOHN G. WILSON,
Mechanical Engineer & Patent Agent,
24, Market Place,
Manchester.
PETER (L.S.) YOUNG.