IMPROVEMENTS IN APPARATUS FOR THE COMBUSTION OF FUEL
Year: 1877

page_text: LETTERS PATENT to Heinrich Gotlieb Bernhard Rober, of Dresden, in the
Kingdom of Saxony, for the Invention of "IMPROVEMENTS IN APPARATUS FOR
THE COMBUSTION OF FUEL" A communication from Louis Schultz, of Meissen,
in the Kingdom of Saxony.
Sealed the 24th May 1878, and dated the 15th December 1877.
PROVISIONAL SPECIFICATION left by the said Heinrich Gotlieb Bernhard
Rober at the Office of the Commissioners of Patents on the 15th December
1877.
HEINRICH GOTLIEB BERNHARD ROBER, of Dresden, in the Kingdom of Saxony.
"IMPROVEMENTS IN APPARATUS FOR THE COMBUSTION OF FUEL." [A communication
from Louis Schultz, of Meissen, in the Kingdom of Saxony.]
This Invention has for its object improvements in apparatus for the combustion
of fuel.
I introduce the fuel, so that it enters the grate or place where it is burned from
underneath or sidewise, by means of a spiral scroll or its mechanical equivalent,
and so that it forms a heap or pile from the top of which the fuel is burnt, and falls
upon the grate or the place where it is completely consumed.
The movement of the spiral scroll is given by hand or power.
One or several stoke holes are arranged near the spiral scroll, whereby the fire
can be observed and the slag be removed.
I do away with the common grate; and at that part of the grate where the said
pile of fuel lays the grate is solid, and is modified for the introduction of artificial
blast whenever it is needed. Hand stoking is thus avoided, the combustion is more
complete than in other cases, and the sinoke is burned.
The spiral scroll or its mechanical equivalent is employed in combination with
an inclined plane, a pipe, in which the spiral scroll turns, and a hopper, the side of
which has the same pitch as the spiral scroll.

page_text: The pipe connects the hopper with the channel and grate for the combustion of
the fuel.
When a forced blast is employed the blast pipe is connected with the hollow
bottom of the inclined fire-grate, and there are terraces and holes through which
blast enters in the centre of the fuel to be consumed.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Heinrich Gotlieb Bernhard Rober in the Great Seal Patent
Office on the 15th June 1878.
HEINRICH GOTLIEB BERNHARD ROBER, of Dresden, in the Kingdom of Saxony.
"IMPROVEMENTS IN APPARATUS FOR THE COMBUSTION OF FUEL." A communication
from Louis Schultz, of Meissen, in the Kingdom of Saxony.
This Invention has for its object improvements in apparatus for the combustion
of fuel.
I introduce the fuel, so that it enters the grate or place where it is burned from
underneath or sidewise, by means of a spiral scroll or its mechanical equivalent, and
so that it forms a heap or pile from the top of which the fuel is burnt, and falls
upon the grate or the place where it is completely consumed.
The movement of the spiral scroll is given by hand or power.
One or several stoke holes are arranged near the spiral scroll, whereby the fire
can be observed and the slag be removed.
I do away with the common grato'; and at that part of the grato where the said
pile of fuel lays the grate is solid, and is modified for the introduction of artificial
blast whenever it is needed, and stoking is thus avoided; the combustion is more
complete than in other cases and the smoke is burned.
The spiral scroll or its mechanical equivalent is employed in combination with
an inclined plane, a pipe, in which the spiral scroll turns, and a hopper, the side
of which has the same pitch as the spiral scroll.
The pipe connects the hopper with the channel and grate for the combustion of
the fuel.
When a forced blast is employed the blast pipe is connected with the hollow
bottom of the inclined fire-grate, and there are terraces and holes through which
blast enters in the centre of the fuel to be consumed.

page_text: in this case is driven by power, and a constant supply of fuel is obtained thereby.
The pipe A projects from the wall of the furnace, and bears on its upper part the
hopper D. Inside the pipe A. rests the spiral scroll a, the axis of which is provided
with a neck and plumber block which is fastened on the front plate b; on the outer
part of the axis of the spiral scroll a worm wheel with pinion c is fixed to transfer
motion. The under part of the pipe A is screwed on the hollow bottom plate & of
the canal E.
In case artificial blast is required this hollow bottom plate d is provided with a
blast pipe F, and bears at its front where it touches the inclined plane of the
grate B several small holes in the direction of these planes by which the blast is
introduced. This manipulation is however only executed where a very high
temperature is required, as, for instance, in puddling or welding furnaces, or in
other general metallurgical processes. The introduction pipe A guides in the
canal E, which, by preference, is of rectangular section. The canal E is widened
towards the grato B from the mouth of the pipo A, and here obtains the same
width as the inclined plane of the grate B, by which a hollow or gutter is formed
for the fuel to lay in or to move through, driven by the spiral scroll. The bottom
of this hollow or gutter is formed by the inclined plane of the grate, and the top of
the canal E is gradually inclined towards the grate, whereby its section is lessened.
These fire-bars which form the hollow of the described grate gutter are made solid
up to the point i. The depth of the gutter in the grate is divided into three or
several terraces, and on both sides such fire-bars are provided, which form an angle
or line that runs together with the surface of the grate from the different terraces
in the front part towards the end of the grate at the line o. The slide C for the
cinders has its place in the hind part of the grate B. The spiral scroll a is turned
to the right-hand side, and is covered up on the right-hand side along the whole
lengths of the hopper. That side of the hopper towards which the fuel is moved by
the scroll is not rectangular to the axis of the spiral scroll, but has the same inclina-
tion or pitch as the spiral itself, both constructions are necessary to avoid the
blocking up of the coal or fuel. H, H, aro stoke holes, which are closed by cominon
doors and which are reduced in height towards the inside. The stoker is enabled
to introduce any stoke iron or shovel to remove the cinders, and to bring the latter
upon the slide from which they can easily be withdrawn. This construction may
however be altered as the case may require, both for different applications and
different fuel.
In some cases I lower the grate a distance under the plate d, of the canal E, for
the more effectual introduction of the blast. In this case the grate B is of smaller
dimensions, or may be dispensed with all together.
Sheet 2 shews various adaptations of the Invention.
Having now set forth the nature of iny Invention of improvements in apparatus
for the combustion of fuel, and explained the manner of carrying the same into
effect, I wish it to be understoood that I claim as my Invention the construction,
as herebefore described.
In witness whereof, I, the said Heinrich Gotlieb Bernhard Rober, have here-
unto set my hand and seal, this Thirteenth day of June, in the year of our