IM- PROVEMENTS IN SMOKE CONSUMING APPARATUS.
Year: 1877

page_text: LETTERS PATENT to Heinrich Conrad Ernst Eggers and Heinrich Christian
Kirchmann, in the City of Hamburg, Germany, for the Invention of "IM-
PROVEMENTS IN SMOKE CONSUMING APPARATUS.'
.
"
Sealed the 29th January 1878, and dated the 4th August 1877
PROVISIONAL SPECIFICATION left by the said Heinrich Conrad Ernst
Eggers and Heinrich Christian Kirchmann at the Office of the Commissioners
of Patents on the 4th August 1877.
HEINRICH CONRAD ERNST EGGERS and HEINRICH CHRISTIAN KIRCHMANN, in the
City of Hamburg, Germany. "IMPROVEMENTS IN SMOKE CONSUMING APPARATUS."
The purpose of this Invention is the consumption of smoke within stoves,
furnaces, and all heating apparatus constructed for burning coal.
The smoking arises from incomplete combustion in consequence of want of
sufficient admittance of air.
Our device, which perfectly prevents smoking, is to divide the grate area by a
vertical partition wall into two parts, to combine part of these halves by means of a
channel in a manner explained in the following, and to feed the two halves of the
grate area with coal alternatively:-One part of the grate area is furnished with
fresh coal after the fuel upon the other has burned down to a clear coke fire. We
provide two channels, which lead from the fire to the chimney, and these can be
alternatively shut by means of sheet iron flap or shutter valves, or in any other
convenient manner. The smoke and the gases from the grate last fed with fresh
coal are by our Invention forced to pass through a channel connecting the two
grates, and then to travel over or through the clear fire before they can pass to the
chimney. Thus while the smoke and the gases of the coal fire are passing through
or over the clear or coke fire, aided by a supply of air from beneath, all smoke is
ignited and burned, and a perfect combustion of the fuel upon the grate area is
attained.
The annexed Drawing explains our Invention as applied to a stove; Figure 1 is a
front view Figure 2, a ground plan; and Figure 3, a section,

page_text: a, a, are the fire-grates; b, the partition or wall which divides the two grate
areas into separate chambers; and c, d, are the fire-doors; e and i are the channels
leading to the chimney f; g and h are the flap or shutter valves, which stand at
right angles to each other, and which can be turned by the handle o to shut off
either one or other of the channels leading to the chimney.
In the Drawing the channel of the left half of the grate area is shown as shut. The
fire-bars of each grate are of curved form or bent upwards at the front, and at this
part they are connected with a channel A, forming at same time the combination of
the two halves of the grate area. The fuel is placed upon the horizontal part of
the fire-bars; and 8 are openings or doors for the admission of fresh atmospheric
air to the fire, as shown by the arrows x, x.
Supposing the stove be at work, according to the annexed Drawing the grate at
right-hand side would have the clear incandescent fire on its bars, fresh coal being
put upon the other grate. As the channel from the coal fire to the chimney is shut
off, the heated gases and smoke are compelled to move in the direction of the arrows
y, y, through the upper bent part of its grate, and through the channel A to the
clear fire, where all the smoke becomes burned completely. From this part of the
grate area the residue of the gases pass into the chimney. When the fire at
the left-hand side is burned down to clear or coke fire, the other half of the grate
area is fed with fresh coal, so that by turning the handle o to close the other
channel leading to the chimney, and opening the one which had before been shut,
the smoke and gases of the right-hand side fire are forced to pass through or over
the coke fire of the left-hand grate, at same time consuming all the smoke from it.
By such alternative feeding of the two halves of the grate area, and by likewise
reversing of the shut-off valves g and h, a complete combustion of the fuel is
attained upon the grate area.
According to the construction of fire-places, as for instance, for hearths, boilers,
kilns, or any other purpose, the construction of our device must be modified.
The main novelty in our Invention is, division of the grate area by means of a
partition or wall into two halves, the communication channel between the front
part of the grate area and the reversing shut-off valves at the channels leading to
the chimney for the purpose referred to.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Heinrich Conrad Ernst Eggers and Heinrich Christian Kirchmann in
the Great Seal Patent Office on the 4th February 1878.
HEINRICH CONRAD ERNST EGGERS and HEINRICH CHRISTIAN KIRCHMANN, in the
City of Hamburg, Germany. IMPROVEMENTS IN SMOKE CONSUMING APPARATUS."
"
The purpose of this Invention is to prevent the smoking of stoves, furnaces,
boiler chimnies, and other heating apparatus constructed for burning coal.
Our device, which perfectly prevents smoking, is to divide the grate area by a
vertical partition wall into two parts, to combine part of these halves by means of
a channel in the manner herein-after explained, and to feed the two halves of the
grate area with coal alternately. While one part of the grate area is furnished
with coal, the fuel upon the other half must be burned down to a coke fire.
The
The two channels leading from the fire to the chimney can alternately be shut
off by means of sheet iron flap valves, or by any other convenient means.
gases from the grate, fed with fresh coal, are thus forced to pass through the
channel connecting the grates, and thence over and through the coke fire to the
chimney.
While the gases of the coal fire are passing through or over the coke fire all smoke
is ignited and burned, and a complete combustion of the fuel upon the grate area takes
place.
Figures 1, 2, and 3 of the annexed Sheet of Drawings explain our Invention as
applied to a stove; Figure 1 is a front view; Figure 2, a ground plan; and
Figure 3, a section.
a, a, is the grate area; b, the partition wall which divides the grate area into
two halves; c, d, are the fire-doors; e and i are the channels leading to the
chimney f; g and are the flap valves, which stand at right angles to each other,
and which can be turned by a handle o, thus shutting off either one or other of the
channels leading to the chimney.
In the Drawing the channel of the left-hand half of the grate area is shown as
shut off. The fire-bars are bent upwards at the front, and at this part they are
connected by a channel A, forming at same time the combination of the two halves
of the grate area. The fuel is placed upon the horizontal part of the fire-bars; r
ands are openings or doors for the entrance of fresh atmospheric air to the fire, as
shown by the arrows in full lines.
If the stove were at work, according to the annexed Drawing, the grate at right-
hand side would have the coke fire, while fresh coal would be burned upon the
other grate. As the channel from the coal fire to the chimney is shut off, the
heating gases and smoke are forced to move in the direction of the arrows, shown
in dotted lines, through the upper bent part of the grate, and through channel A to
the coke fire, where all smoke is burned completely. From this part of the grate
area the gases pass into the chimney. When the fire at left-hand side is burned
down to a coke fire, the other half of the grate area is fed with fresh coal, and by
turning the handle o, and closing the other channel leading to the chimney, and
opening the one that was previously shut, the smoke and gases of the right-hand
fire are forced to pass through or over the left-hand coke fire, at same time
consuming all smoke. By such alternate feeding of the two halves of the grate
area, and by a similar reversing of the shut-off valves g and h, a complete com-
bustion of the fuel upon the grate area is attained.
According to the construction of fire-places, whether for hearths, boilers, or any
other purpose, the construction of our device must be modified. A modification of
the same, as applied to steam boilers, is shown in Figures 4, 5, 6, and 7 of the
accompanying Drawing, in which the same letters correspond with the same parts
as in the before-described arrangement for a stove.
And having now described the nature of our said Invention and in what manner
the same is to be performed, we declare that we claim as our improvements in

page_text: smoke consuming apparatus the division of the grate area by means of a partition
wall into halves; the communication channel between the front part of the grate
area; the reversible shut-off valves of the channels leading to the chimney, for the
purpose and in the manner as described, and shown in the accompanying Sheet of
Drawings.
In witness whereof, we, the said Heinrich Conrad Ernst Eggers and Heinrich
Christian Kirchmann, have hereunto set our hands and seals, this Twenty-
first day of January, One thousand eight hundred and seventy-eight.