An Arrangement for the Prevention of Smoke and More Perfect Combustion of Fuel in Furnaces.
Year: 1894

page_text: Date of Application, 24th Apr., 1894
Complete Specification Left, 24th Jan.. 1895-Accepted, 24th May, 1895
PROVISIONAL SPECIFICATION.
An Arrangement for the Prevention of Smoke and More Perfect
Combustion of Fuel in Furnaces.
NOEL CHANDLER of Foundry Lodge Hednesford, Stafford, Engineer, and
HENRY RALLINGS of Sunnyside, 96 Victoria Road, Aston, Birmingham, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention has for its object improvements in apparatus for the more perfect
combustion of fuel in steam boilers and other furnaces, & for preventing smoke.
Our invention may be applied to the furnaces of boilers using ordinary or natural
draught, and also to furnaces which are supplied with air by mechanical means
such as by a fan, or blower, or steam jet or jets, commonly known as forced
draught.
We arrange a metal box or cover having an upper plate or lid, but without a
bottom, so that air may pass through or between the firebars into the box.
"
" at
This "air box covers part of the "dead-plate" and part of the "firebars
the end of the furnace nearest to the door; we arrange at one end of the "air box
an opening through which air may pass towards the fuel & so supply air to the top
of the fire for the more perfect combustion of the fuel.
This air may be supplied in such quantities as to prevent smoke.
Our invention consists of a simple & efficient arrangement for supplying fresh
air from the ashpits of boiler & other furnaces on to or near the top of the fuel.
This air box may be made of a suitable size to pass in and out of the ordinary
furnace door, or we may employ two or more of these "air boxes" side by side so
ns to reach nearly or quite across the furnace.
These "air boxes" may be moved backwards or forwards on the firebars-so as
to regulate the supply of fresh or heated air on to the top of the fuel.
The outlet from the "air box" is so arranged & shaped that the air is directed on
to the fuel in the most advantageous position for good combustion,
We prefer to form the air outlet of the "air boxes" so that coal or other fuel
can be conveniently thrown over the top of the box and yet fall clear of the air
outlet so as to form no obstruction to the air. These air boxes may be easily
withdrawn or removed for the purpose of cleaning the fires and bars when
necessary.
Dated this 23rd day of April 1894.
NUEL CHANDLER.
HENRY RALLINGS.
COMPLETE SPECIFICATION.
An Arrangement for the Prevention of Smoke and More Perfect
Combustion of Fuel in Furnaces.
We NOËL CHANDLER, of Cannock Chase Engineering Works Hednesford,
Staffordshire, Engineer, and HENRY RALLINGS, of 96 Victoria Road Aston,
Birmingham, 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 :-
This invention has for its object improvements in apparatus for the more perfect

page_text: combustion of fuel in steam boilers & other furnaces & for preventing smoke. Our
invention may be applied to the furnaces of boilers using ordinary or natural
draught & also to furnaces which are supplied with air by mechanical means such
as by a fan or blower or steam jet or jets, commonly known as "forced draught."
By the application of our invention to boiler and other furnaces the smoke is
almost entirely consumed by admitting air between the bars from the ash pit,
which being warm and again coming between the hot bars and passing through the
hot deflector is so rarefied that when directed by the lip of the deflector upon the
gas a warm current in the required quantity acts upon the gases before ignition and
at once converts them into flame before they pass the bridge.
Our deflector has no valve or mechanism to get out of order and is so portable
that it may be taken out for cleaning the fires and replaced without any skill being
required.
Considerably more flame is produced & consequently more heat traverses the
flues with a larger quantity of steam as the result, while less soot is formed upon
the pipes of the economisers, thereby giving more heat to the feed water.
The air is deflected on to the fire at such an angle as to prevent it getting to the
furnace plates thereby preventing unequal expansion.
The deflector cannot burn away in consequence of the incoming air taking up
the heat and passing it to the fire which renders the, box practically indestructible.
For muffles or furnaces of any kind its action is certain and invaluable while its
cheapness renders it generally appliable to all kinds of boilers and furnaces.
""
At
In carrying our invention into effect we arrange a metal box or boxes or
cover having an upper plate or lid, without a bottom so that air may pass up
through or between the fire bars into the box which covers part of the "dead
at the end of the furnace nearest the door.
plate" & part of the "fire bars
the side of the "air box" next the fuel au opening is provided through which-
the air passes towards the fuel & so supplies air to the top of the fire for the
more perfect combustion of the fuel, while the air may be regulated and supplied in
such quantities as to practically obviate any smoke.
Our invention consists of a simple & efficient arrangement for supplying fresh
air from the ashpits of boilers & other furnaces on to or near the top of the
fuel, the air box of which may be made of a suitable size to pass in & out of the
ordinary furnace door. or we may employ two or more of these "air boxes" side by
side so as to reach nearly or quite across the furnace.
The "air boxes" may be moved backwards or forwards on the fire bars, so as
to regulate the supply of fresh or heated air on the top of the fuel, the outlet
from the air box" being so arranged and shaped that the air is directed on to
the fuel in the most advantageous position for good combustion.
We prefer to form the air outlet of the air boxes" so that coul or other fuel
can be conveniently thrown over the top of the box & yet fall clear of the air
outlet so as to form no obstruction to the air.
In order that our invention may be clearly understood & more easily carried into
practice we have appended hereunto a sheet of drawings upon which we have fully
illustrated the nature of our said invention together with the mode of carrying it
into effect.
Figure 1. is a sectional view of au ordinary boiler B having one of our air
deflectors applied thereto.
Figure 2., is a longitudinal section through a similar boiler.
Figure 3. is a view of the air deflector looking from the fire side.
Referring to the drawings the air box A is formed with the deflecting top'a
sides a and opening or aperture a so, that the warm air from the ashpit H
ascends through the bars C and passes through the air box A being deflected on
to the top of the fire E by the deflecting top a¹ as shown by the arrows. The bar'a
assists to prevent the fire from falling into the box, and the whole' being portable
can be readily moved more or less ou to the dead plate K thereby decreasing or
increasing the quantity of air which may pass through the bars.

page_text: The air box may be made for convenience in two or more lengths and may be
provided with strengthening divisions such as shown by dotted lines a' and may be
varied in shape & detail without departing from the nature of our said invention.
Having now particularly, described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
The apparatus for the more perfect combustion of fuel in boilers, furnaces & such
like consisting of the air box or boxes A substantialy such as herein set forth &
shewn upon the accompanying drawings.
00
1005
NOEL CHANDLER.
HENRY RALLINGS.