An Improved Apparatus for the Prevention and Consumption of Smoke and More Perfect Combustion of Fuel in Steam Boilers and other Furnaces.
Year: 1889

page_text: Dite of Application, 22nd July, 1889
Complete Specification Left, 16th Apr., 1890--Accepted, 17th May, 1390
PROVISIONAL SPECIFICATION.
An Improved Apparatus for the Prevention and Consumption of
Smoke and More Perfect Combustion of Fuel in Steam Boilers
and other Furnaces.
JAMES DRABBLE 5 Linnell Road, Edmonton, Fairfield, in the county of Middlesex,
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of my Invention is for an improved and novel construction of apparatus
for the prevention and consumption of smoke, and for the more perfect combustion of
fuel in steam boilers, and other furnaces by the aid of induced currents of air.
The same can be applied with the greatest facility and cheapness to any steam
boiler furnace, or other furnace, to which the same may be adapted, without alteration
in the structure thereof, many devices have been resorted to, their object being the
prevention or consumption of smoke in steam boilers and other furnaces and an
increase of combustion of fuel therein, these are costly and complicated, and often
require for their application a special construction, or an alteration of the furnace,
consequently many such inventions have only been partially effective.
In carrying out my Invention I introduce into the furnaces air, by means of metal
pipes under the grate bars and through the bridge wall and standing up behind the
wall, a short distance above the top of the bridge, the said pipes are arranged with
fire clay nozzles set at right, and left angles so that the draughts created by the said
air pipes intersect each other in the boiler tubes, thus promoting more complete
combustion of the fuel. The said apparatus is illustrated in the accompanying
drawings.
Fig. 1 represents the section of a boiler with the apparatus used affixed thereto.
Fig. 2. the plan of boiler showing the fire bars D. and the position of pipes A. and
fire clay nozzle B.
Fig. 3. shows the end view of boiler and the end of pipes A.
Fig. 4. is a section of metal box and lid E for closing and for regulating the air in
the said air pipes before described by A. in fig. 2. in the drawings aforesaid.
A. represents the metal air pipes secured to the dead plate and passing under the fire
bars D. and through the bridge C. standing upright with B. a fire clay nozzle is
situated as shown on fig. 2. C. represents the bridge D. the fire bars. E. the box
and lid for regulating, or closing the air pipes A. as previously described.
Dind this on der of Iul 1889
JAMES DRABBLE.
COMPLETE SPECIFICATION.
An Improved Apparatus for the Prevention and Consumption of
Smoke and More Perfect Combustion of Fuel in Steam Boilers
and other Furnaces.
JAMES DRABBLE 5 Linnell Road Fairfield Edmonton in the County of Middlesex
Engineer do hereby declare the nature of this invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by the following
statement:
The object of my Invention is for an improved, and novel construction of apparatus
for the prevention and consumption of smoke, and for the more perfect combustion
of fuel in steam boilers and other furnaces, by the aid of induced currents of air.
The same can be applied with the greatest facility and cheapness to any steam
hoiler furnace, or other furnace to which the same may be adapted, without alteration
in the structure thereof. Many devices have been resorted to, their object being the

page_text: prevention or consumption of smoke in steam boilers and other furnaces, and an
increase of combustion of fuel therein, these are costly and complicated, and often
require for their application a special construction, or an alteration of the furnace,
consequently many such inventions have only been partially effective.
In carrying out my Invention I introduce into the furnaces air by means of metal
pipes under the grate bars and through the bridge wall, and standing up behind the
wall a short distance above the top of the bridge, the said pipes are arranged with
nozzles made from a mixture of fire-clay and ganister these are set at right, and left
angles, so that the draughts created by the said air pipes intersect each other in the
boiler tube or tubes, thus promoting more complete combustion of the fuel. The said
apparatus is illustrated in the accompanying drawings.
Fig. 1. represents the section of a boiler with the apparatus used affixed thereto.
Fig. 2. the plan of boiler showing the fire bars D. and the position of pipes A. and
the nozzles composed of fire clay and ganister B.
Fig. 3. shows the end view of boiler and the end of pipes A. fixed to the dead
plate.
Fig. 4. is a section of metal box and lid E, for opening and for closing, and for
regulating the air in the said air pipes before described by A in Fig. 1. in the
drawings: :-
A in Figs. 1 and 3. represent the metal air pipes secured to the dead plate and
passing under the fire bars D. and through the bridge C. standing up above the
bridge at right and left angles with B as shown in Figs 1. and 2. The nozzles are
made of a mixture of fire clay and ganister and are situated as shown on Fig. 2.
C. represents the bridge. D. shows the fire bars. E is the box and lid for opening
and for regulating the draughts through the air pipes A. as before described. The
said box and lid are made in the form of a gridiron disc, so that when it is open it
ensures a perfect current of air being conveyed through the air pipes A.
opening of the gridiron disc is automatic so that when the furnaco door is opened, it
also opens the gridiron disc, thus allowing the air to fill the air pipes. I therefore do
not depend upon the workman to open the lids to produce the desired effect.
The
The arrangement by which this is done is shown in drawings on sheet 2. Fig. 4
which is the front view of an enlarged drawing of the box and lid E. Upon the
face of the said gridiron box is fixed a gridiron disc, which is moveable, so that it
will cover the open spaces which are in the gridiron box, when it is required to be
closed. In the centre of the lid is fixed a stud or set screw upon which the disc
moves the proper distance required, the distance for it to move is regulated by two
stops, one for when it is open, and the other for when it is closed, the lids on each
side of the furnace are connected together with a bar as shown by F. which I call
the connecting bar so that when the door of the furnace is opened the said door moves
the stud and the bar, at the same time opens the disc lids, the said arrangement is
applicable to all kinds of furnace doors.
E. shows the box and lid.
F. is the connecting bar.
G. is the stud on the connecting bar.
H. shows the stud or set screw in the centre of the disc.
1. describes the stops for regulating and controlling the disc lids.
Fig. 5. is a side view of the box and lid E as before described.
Fig. 6. shows the position of the furnace door moving the stud G.
Fig. 7. represents the disc aforesaid open.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. Introducing air through metal pipes under the grate bars, and through the
bridge, standing up above the bridge, with nozzles set at right and left angles, so that
the o

page_text: 2. The application of nozzles made from a mixture of fire clay and ganister upon
the air pipes; substantially as before described.
3. The automatic arrangement for opening the box and lid of the air pipes, sub-
stantially as before particularly described.
Dated this 16th day of April 1890
JAMES DRABBLE.