IMPROVEMENTS IN APPARATUS TO BE APPLIED TO FURNACES FOR THE MORE EFFECTUAL CONSUMPTION OF Smoke
Year: 1880

page_text: LETTERS PATENT to Adam Cyrus Engert, of Three Mills Lane, Bromley-
by-Bow, in the County of Middlesex, for an Invention of "IMPROVEMENTS
IN APPARATUS TO BE APPLIED TO FURNACES FOR THE MORE EFFECTUAL
CONSUMPTION OF Smoke"
PROVISIONAL SPECIFICATION left by the said Adam Cyrus Engert at the
Office of the Commissioners of Patents on the 10th September 1880.
ADAM CYRUS ENGERT, of Three Mills Lane, Bromley-by-Bow, in the County of
Middlesex. "IMPROVEMENTS IN APPARATUS TO BE APPLIED TO FURNACES FOR
THE MORE Effectual CoNSUMPTION OF SMOKE."
This Invention has for its object improvements in apparatus to be applied to
furnaces for the prevention or more effectual consumption of smoke.
For this purpose I provide within the furnace, at a short distanco from the fire
door, a flap or shutter which, when desired, can be closed down towards the fire
bars, and into contact with the burning fuel resting upon them. Thus, a small
front compartment is temporarily separated by the flap or shutter from the main
body of the furnace. In this way the rush of cold air into the main body of the
furnace and under the boiler, when the fire door is opened, is prevented.
In feeding the furnace, after opening the door, some of the ignited fuel in the
front compartment is pushed forward beneath the lower edge of the flap or
shutter; then fresh fuel is laid on the fire which remains, and the fire door is again
closed. The gases resulting from the fuel just put on are then obliged to find their
way beneath the flap or shutter, and amongst the ignited fuel upon which it rests,
and so are effectually consumed. In a short time, when the evolution of gas has
abated, the flap or shutter is raised out of use, but it is again closed down before
the fire door is next opened.
In some cases I form the flap or shutter of several comparatively narrow plates
jointed together, and I arrange it to slide in guides. This Hap or shutter is made
to pass through a slit in the furnace front, immediately over the fire door, and
when the jointed flap is pushed in its leading edge passes forwards and descends on
to the ignited fuel resting on the fire bars, and so (as already explained) it prevents
D

page_text: an inrush of cold air when the fire door is opened, and it separates off from the
main body of the furnace a front compartment to receive the fresh fuel. When out
of use, this flap or shutter is drawn back out of the furnace.
Sometimes I employ a second flap, closing down in front of the green fuel, and
between it and the fire door, in order more effectually to regulate the passage of air 8
in due proportion amongst this fuel, to mix with the gases and carry them forward.
The flaps or shutters may be so arranged that by the act of raising the one nearer
to the door the other or further flap is necessarily lowered.
Where circumstances admit I prefer to construct the fire box to project in front
of the boiler to such an extent that the front feeding chamber may be in front of 1
the boiler, as by this means the adaptation of the flap or shutter for sbutting off
this compartment from the remainder of the fire box is rendered more easy.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Adam Cyrus Engert in the Great Seal Patent Office on the 10th
March 1881.
ADAM CYRUS ENGERT, of Three Mills Lane, Bromley-by-Bow, in the County of
Middlesex. “IMPROVEMENTS IN APPARATUS TO BE APPLIED TO FURNACES FOR THE
PREVENTION OR MORE EFFECTUAL CONSUMPTION OF SMOKE."
This Invention has for its object improvements in apparatus to be applied to
furnaces for the prevention or more effectual consumption of smoke.
For this purpose I provide within the furnace at a short distance from the fire
door a flap or shutter, which, when desired, can be closed down towards the fire
bars and into contact with the burning fuel resting upon them. Thus a small
front compartment is temporarily separated by the flap or shutter from the main
body of the furnace. In this way the rush of cold air into the main body of the
furnace and under the boiler, when the fire door is opened, is prevented.
In feeding the furnace, after opening the door, some of the ignited fuel in the
front compartment is pushed forward beneath the lower edge of the flap or shutter,
then fresh fuel is laid on the fire which remains, and the fire door is again closed. The
gasos resulting from the fuel just put on are then obliged to find their way beneath
the flap or shutter, and amongst the ignited fuel upon which it rests, and so are
effectually consumed. In a short time, when the evolution of gas has abated, the
flap or shutter is raised out of use, but it is again closed down when the fire door
is next opened.
In some cases I form the flap or shutter of several comparatively narrow plates
jointed together, and 1 arrange it to slide in guides. When the jointed flap is
pushed in its leading edge passes forwards and descends on to the ignited fuel
resting on the fire bars, and so (as already explained) it prevents an inrush of cold
air when the fire door is opened, and it separates off from the main body of the
furnace a front compartment to receive the fresh fuel.
Sometimes I employ a second flap, closing down in front of the green fuel, and
between it and the fire door, in order more effectually to regulate the passage of
air in due proportion amongst this fuel to mix with the gases and carry them
forward. The flaps or shutters may be so arranged that by the act of raising the
one nearer to the door the other or further flap is necessarily lowered.
Where circumstances admit, I prefer to construct the fire box in front of tho
boiler.
In order that my said Invention may be most fully understood and readily
carried into effect, I will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a section of the front part of a steam boiler furnace. a, a, is a
chamber, which I bolt on to the front of the furnace, around the fire door or rather
around the door way where a door is usually fitted. I place a simple sheet iron
door at a¹ at the outer end of the chamber a. At 6 a portion of one of the fire
bars is seen; c, c, is a jointed flap or shutter carried upon guides d, d, within the
chamber a; the inner end of this shutter is formed as a hood, as is seen at o¹.
When the furnace is to be fed with fresh fuel the shutter c is pushed forwards until
the hood c¹ descends down on or near to the ignited fuel resting on the fire bars.
Thus, when the door is opened, the rush of cold air into the furnace is prevented.
Some of the ignited fuel is then pushed forward beneath the edge of the shutter,
and its place is supplied by fresh fuel, which is laid upon the fire which still

page_text: remains in the outer compartment temporarily separated by the shutter from the
body of the furnace. The fire door is then closed.
The body of the furnace is thus temporarily divided into two compartments.
The compartment next to the door serves for the coking of the fuel and the
separation of the volatile products before it is passed on into the further compart-
ment, which is more directly in connection with the flues. The gases evolved from
the fresh fuel on the fire have to find their way beneath the edge of the shutter to
reach the further body of the furnace and to pass to the chimney. The smoke and
gases are thus brought into close proximity to fuel in a state of active combustion,
and so are effectually consumed. When the evolution of smoke has for the
most part ceased the shutter c may be drawn up in front, and it will then hang
down in front of the door in such a position as to check the entrance of air into the
furnace when the door is opened.
The ends of the guides d, d, are inclined, and form stops on which the hood c' is
allowed to lie when it is desired to have the shutter, partly closed, as when raking
out clinker. On pushing the shutter further in the hood comes down until its edge
rests on the fuel.
The door and the shutter are both so formed that a little air may enter the
furnace at the bottom of the door-way, and carry forward with it the smoke and
gas evolved by the fresh fuel.
.
Figure 2 shows an arrangement differing somewhat in its detail; the shutter is
lowered by tipping upon pivots cl, cl, which may be able to slide along guides.
-Suitable retaining stops-are-provided, but-these-are-not-indicated.in_the_Drawing..
To admit_of_the_shutter being readily worked it is provided with an eye at c*,
into which the workman inserts a hook by means of which, in closing the shutter,"
he first raises the hanging portion and then pushes it forward; or stationary pivots
may be employed.
The shutter may be so arranged that it may be worked without opening the door
at a', but in practice this is not needed.
Having thus described the nature of my said Invention, and the manner of
performing the same, I would have it understood that I claim,-
First. The application to a furnace of a moveable flap, or shutter, or like
contrivance, which can be closed down towards the fire bars so as temporarily to
separate from the body of the furnace a front compartment to receive the fresh
fuel, and which flap or shutter serves to prevent a rush of air into the furnace, and
to compel the gases and smoke evolved from the fresh fuel to come into close
proximity with fuel already in a state of active combustion.
Second. My improvements in apparatus to be applied to furnaces for the
prevention or more effectual consumption of smoke, substantially as described.
In witness whereof, I, the said Adam Cyrus Engert, have hereunto set my
hand and seal, this Seventh day of March, in the year of our Lord One
thousand eight hundred and eighty one.
T
NARDA