Smoke Consuming Appliance for Steam Boilers.
Year: 1899

page_text: Date of Application, 10th Aug., 1899
1000
Smoke Consuming Appliance for Steam Boilers.
JOSEF SVIGELJ, 173, Thomson Street, Glasgow, ALEXANDER DICK THOMSON,
1, Underwood, Paisley, JAMES STEWART MCCOWATT, Holmfield, Langbank, all
Engineers, do hereby declare the nature of this invention to be as follows:-
The nature of our invention mainly consists in inducing a certain quantity
of hot air, into the furnace flues of boilers, at such a point or place, so as to
mix and chemically combine with the unburnt gases as they leave the furnace
in contact with the flame, thus causing complete combustion of these gases,
usually these gases are not burned but escape up the chimney in the shape of
black smoke.
By referring to the drawing the means by which this is effected will be easily
understood. (A) is a damper plate attached to, or in communication with the
outer end of air inlet pipe (B), the inner end of which in turn is attached or
in communication with air chamber (C) to which a spout or outlet branch is
secured.
The working of the above arrangement as described is as follows:-The fire
is lighted in the usual way, the damper (A), being adjusted to suit, and as the
flames leave the fire box, a partial vacuum is formed inducing a current of air
along pipe (B), into chamber (C), and out the orifice or outlet (D), chemically
combining with the unburnt gases and causing complete combustion.
Dated this Eight day of August Eighteen Hundred and Ninety Nine.
Smoke Consuming Appliance for Steam Boilers.
JOSEF SVIGELJ, 173, Thomson Street, off Duke Street, Glasgow, Engineer,
ALEXANDER DICK THOMSON, 1, Underwood Road, Paisley, Marine Engineer,
JAMES STEWART MCCOWATT, Holmfield, Langbank. Engineer & Machinery Mer-
chant, 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:-
Our invention consists essentially in inducing a quantity of air, in an intensely
heated state (and regulated automatically by the common damper) behind the
bridge of furnaces of boilers, where it chemically combines with the unburnt

page_text: gases proceeding from said furnaces, causing complete combustion of these
gases by contact with the flame, thus preventing the formation of any black
smoke.
By referring to the accompanying drawing the apparatus for effecting the
above purpose will be easily understood from the following description:-
(A, A), is a pipe or tube, made in two parts, and supported on stools or
brackets (B, B). The two parts of the pipe (A, A) are connected by means of
an expansion coupling (C). One end of pipe (A, A), is fixed to a chamber (D)),
which in turn is secured to a dumb-plate (E,) which supports the furnace bars (F.)
The other, or outer end of pipe (A, A) is attached to the flue-wall (G) through
which it also passes. Inside the tube (A, A,) and supported in centre of same
by means of distance pieces marked (H), is another tube (I), one end of which
is stopped by means of a conical shaped plug (J,) the other or inner end of
same, being left open. Attached to chamber (1) and surmounting same is a
mouth-piece or outlet (K).
The working of our invention as above described is as follows: The furnace
fire having been ignited in the usual way, a current of air is induced or drawn
in and through the pipe (A, A,) and passes along the space (L.) formed between
the outside of pipe (I) and inside of pipe (A, A,) being directed into this passage
through the medium of the conical plug (J) the object being to bring the
cooler air, (which would be in the centre of the pipe (A, A), if inner tube (I)
was not there) as near the surface which heats it, as possible so as to increase
the temperature of the air, and to make its temperature more uniform through-
From the passage marked (L), it enters the chamber (D), and passes out
through the mouth-piece (K), where it chemically combines with the unburnt
gases from the furnace, and the flames coming into contact with same, ignites
them causing their complete combustion, and thus preventing any formation
of black smoke.
out.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
(1) Air introduced from back end of boiler.
(2) Internal tube as a means of increasing the temperature of the induced air.
(3) The outlet or orifice is so constructed that the direction of the induced
air is in the same direction as the draught.
(4) The outlet or orifice is covered so as to prevent the choking up of air pipe
with dust.
Tinted this Oth dor of War 1000