said Improvements being Specially Applicable for Consuming the Smoke from the Furnaces thereof.
Year: 1885

page_text: said Improvements being Specially Applicable for Consuming
the Smoke from the Furnaces thereof.
I, THOMAS HUDSON of Coatdyke in the County of Lanark, North Britain, Boiler
Maker do hereby declare the nature of the said invention for IMPROVEMENTS IN
STEAM AND OTHER BOILERS OR EVAPORATORS THE SAID IMPROVEMENTS BEING
SPECIALLY APPLICABLE FOR CONSUMING THE SMOKE FROM THE FURNACES THEREOF
to be as follows:-
This Invention, which relates to improvements in steam and other boilers or
evaporators the said improvements being specially applicable for consuming the
smoke from the furnaces thereof has for its object to so construct the said boilers
or evaporators as to cause the products resulting from the combustion of fuel in
one or more of its furnaces, to be introduced into the front end of a further furnace
which is provided for the special purpose of consuming these hitherto unconsumed
products.
In carrying this Invention into practice, the boilers are provided with say, four
longitudinal flues arranged, two with their axes in the same horizontal plane and
two in the same vertical plane that is to say forming a square or a diamond-shaped
figure, all of the said flues being below the water level. The two flues whose axes
are in the same horizontal plane, are fitted with furnace grates for tiring, and the
rear ends of the two said flues are connected through a tube or the equivalent
thereof with the rear end of the upper or third flue. The third and fourth flues,
that is to say the flues whose axes are in the same vertical plane are connected
together at their forward ends by a tube or its equivalent, which tube may be
arranged either inside or outside of the boiler shell. The fourth flue is provided
with such a furnace as is best suited to consume the gases resulting from the
herein before mentioned furnaces, and if desired the connection between the third
and fourth flues may be made with the frame of the furnace door which is fitted
at the front end of the fourth flue.
The fourth flue is connected to the external brick flues and to the chimney in a
manner similar to that of an ordinary Cornish or single-flue boiler.

page_text: In place of employing the four-flue boiler in the manner herein before described,
the said flues may be so connected that the gases resulting from the combustion
of fuel in the lower or fourth flue are conducted forward through the third flue and
discharged into the forward ends of the first and second flues, which under this
construction would be fitted with furnaces best suited to consume such gases.
If desired, steam jets or other means may be employed for assisting the
combustion of fuel in the gas-producing furnaces, that is to say in the furnaces
from which the unconsumed gases are subsequently conducted to the front or
forward end of the boiler and consumed in the further furnace or furnaces thereof.
It is obvious that in place of a boiler constructed with four flues to be operated
as herein before described, boilers may be constructed with three, five or more such
flues these being connected so as to conduct the gases resulting from the combustion
of fuel in one or more of the said flues, into the forward ends of other such flues
where the said gases are consumed in additional furnaces.
It is to be understood that in place of employing one large flue for the return of
the products of combustion to the front or forward end of the boiler, there may be
substituted a series of smaller tubes, such tubes for example as those employed in
locomotive boilers.

page_text: Improvements in Steam and other Boilers or Evaporators, the
said Improvements being Specially Applicable for Consuming
the Smoke from the Furnaces thereof.
I, THOMAS HUDSON of Coatdyke, in the County of Lanark, North Britain, Boiler
Maker, do hereby declare the nature of my invention for "IMPROVEMENTS IN
STEAM AND OTHER BOILERS OR EVAPORATORS THE SAID IMPROVEMENTS BEING
SPECIALLY APPLICABLE FOR CONSUMING THE SMOKE FROM THE FURNACES THEREOF
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My Invention which relates to improvements in steam and other boilers or
evaporators the said improvements being specially applicable for consuming the
smoke from the furnaces thereof, has for its object to so construct the said boilers
or evaporators as to cause the products resulting from the combustion of fuel in
one or more of its furnaces, to be introduced into the front end of a further furnace
which is provided for the special purpose of consuming these hitherto unconsumed
products.
In carrying this Invention into practice the boilers are provided with, say four
longitudinal flues arranged two with their axes in the same horizontal plane and
two in the same vertical plane, that is to say, forming a square or a diamond
shaped figure, all of the said flues being below the water level. The two flues
whose axes are in the same horizontal plane are fitted with furnace grates for
firing, and the rear ends of the two said Ĥlues are connected through a tube or the
equivalent thereof with the rear end of the upper or third flue. The third and
fourth flues, that is to say the flues whose axes are in the same vertical plane are
connected together at their forward ends by a tube or its equivalent, which tube
may be arranged either inside or outside of the boiler shell." The fourth flue is
provided with such a furnace as is best suited to consume the gases resulting from
the bereinbefore mentioned furnaces, and if desired the connection between the
third and fourth flues may be made with the frame of the furnace door which is
fitted at the front end of the furnace flue.
The fourth flue is connected to the external brick flues and to the chimney in a
manner similar to that of an ordinary Cornish or single-flue boiler.
In place of employing the four flue boiler in the manner hereinbefore described,
the said flues may be so connected, that the gases resulting from the combustion of
fuel in the lower or fourth flue, are conducted forward through the third flue and
discharged into the forward ends of the first and second flues which under construc-
tion would be fitted with furnaces best suited to consume such gases.
If desired steam jets or other means may be employed for assisting the combus-'
tion of fuel in the gas producing furnaces, that is to say, in the furnace from which

page_text: the unconsumed gases are subsequently conducted to the front or forward end of
the boiler and consumed in the further furnace or furnaces thereof, or the last
mentioned furnace or furnaces instead of the gas producing furnaces may be
provided with steam jets or their equivalents.
It is obvious that in place of a boiler constructed with four flues to be operated
as hereinbefore described, boilers may be constructed, with three, five, or more such
flues these being connected so as to conduct the gases resulting from the com-
bustion of fuel, in one or more of the said flues, into the forward ends of other
such flucs, where the said gases are consumed in additional furnaces.
It is to be understood that in place of employing one large flue for the return of
the products of combustion to the front or forward end of the boiler, there may be
substituted a series of smaller tubes, such tubes for example as those employed in
locomotive boilers.
In order that my said Invention may be properly understood and readily carried
into effect, I will now proceed to describe the drawings hereunto annexed.
Figure 1, is a longitudinal section taken on the line A B (Figure 2) of one form
of boiler constructed according to my present Invention.
Figures 2 and 3, are respectively a front and rear end elevation of the same.
Figure 4, is a view of the boiler partly in side elevation and partly in longi-
tudinal section taken on the line C, D, Figure 2.
In the boiler which I have represented upon the annexed drawings, there are
provided the two flues 1 and 2, the axes of which are in the same horizontal plane.
These flues 1 and 2 as shewn more particularly with reference to the flue 1 at
Figure 4, at their front or forward ends, are fitted with the furnace doors and
frames 3, which may be of any of the well known constructions. These flues 11
and 2, are also provided as shewn at Figure 4, with the furnace bars 4, dead
plate 5, bridge 6, and other necessary furnace fittings, in manner similar to furnaces
of ordinary construction. The rear end of the flués 1 and 2, open into the brick
or fire clay lined casing or chamber 7,-The rear ends of the tubes S, also open
into this chamber 7, and the products of combustion passing out from the flues 1
and 2, are thus caused to travel forward through the said tubes 8, to the front end
of the boiler. At this front end of the boiler the tubes 8, open into the casing 9,
in the lower part of which is fitted the frame and furnace door 10, of the fluc 11,-
The casing as shewn at Figures 1 and 2 is formed double so as to prevent, to a
greater or less extent, the radiation of heat and consequently cooling of the unburnt
gases on their passages to the flue 11, This fluc 11, in the ordinary well known
manner, is fitted with the furnace bars 12, (Figure 1) and other necessary furnace
fittings, or with any other equivalents thereof, best suited for burning. The gases
entering from the casing 9, The rear end of the flue 11, as shewn at Figures 1
and 3, is connected with the escape Blue or chimney 13, or its equivalent, in any
convenient manner.
_
If desired the two flues 1 and 2, as also the tubes 8, may be fitted with a wet
combustion chamber. Steam jets or the equivalents thereof may if required be
applied to the furnaces in the flues 1 and 2, or to the furnace in the flue 11.
.I desire it to be understood although I have herein before described and upon the
annexed drawings, I have represented a particular form of boiler in which my
present improvements are embodied, that I do not confine myself to such form, as
the same may obviously be varied in many ways without departing from the
essential features of my Invention, for example in place of the series of tubes S, a
further flue of the necessary dimensions may be employed to convey the products
of combustion from the rear to the front end of such boiler; or, the boilers may
each be provided with three, five or it may be more flues all arranged below the
water level, and so connected as to conduct the gases resulting from the combustion
of fuel in one or more of the said flues, into the forward ends of other such flues,
where the said gases are consumed in additional furnaces.

page_text: Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed I declare that what
I claim is.
Steam and other boilers or evaporators provided with three, four, or more flues,
and with three or more furnaces which are so arranged that the unburnt products
resulting from the combustion of fuel, in one or more of the said furnaces, are con-
ducted to, and introduced into the front end of a further furnace and therein
consumed all substantially as and operating in the manner and for the purposes
herein before set forth with reference to the annexed drawings, or the mechanical
equivalents of all or any of the parts thereof.
1
001
a
1000
D. DRYSDALE AUSTIN,
Applicant's Agent,
101, St. Vincent Street, Glasgow.