IMPROVEMENTS IN FIRE-GRATES FOR BURNING DENSE AND FILAMENTOUS OR FIBROUS FUEL
Year: 1881

page_text: LETTERS PATENT to Charles Denton Abel, of No. 28, Southampton
Buildings, Chancery Lane, in the County of Middlesex, for an Invention
of "IMPROVEMENTS IN FIRE-GRATES FOR BURNING DENSE AND FILAMENTOUS
OR FIBROUS FUEL." A communication from abroad by Alexis Godillot, of
Paris France
PROVISIONAL SPECIFICATION left by the said Charles Denton Abel at
the Office of the Commissioners of Patents on the 3rd September 1881.
CHARLES DENTON ABEL, of No. 28, Southampton Buildings, Chancery Lane, in
the County of Middlesex. "IMPROVEMENTS IN FIRE GRATES FOR BURNING DENSE
AND FILAMENTOUS OR FIBROUS FUEL." [A communication from abroad by
Alexis Godillot, of Paris, France.]
.
This Invention has for its object an improved construction of fire grates for
burning dense and filamentous or fibrous fuel, such as megasse or sugar cane trash,
sawdust, tann, small coal, and the like.
For this purpose the grate is constructed of sets of grate bars arranged so as to
form two or more triangular faces set up at an angle to each other and to the bed
of the furnace, with the apex resting against either a flat vertical wall, or in the
angle formed by two walls of the furnace, the grate being thus made to assume the
shape of a semi pyramid or other segment of a pyramid. The bed on which this
grate rests is formed solid, either of brickwork or of iron, or of both combined.
The fuel is fed from an orifice or pipe in the roof of the furnace immediately over
the grate so as to fall on the apex of the latter in a thin divided layer, whereby
the particles thereof are effectually brought into contact with the air so to
become thoroughly consumed, the remaining ashes being made to descend gradually
to the base of the grate and on to the bed, whence they are removed from time to
time by a rake introduced through the furnace door opposite the grate. The base
of the grate is so formed as to raise the lower ends of the bars somewhat above
the bed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Denton Abel in the Great Seal Patent Office on the
2nd March 1882.
CHARLES DENTON ABEL, of No. 28, Southampton Buildings, Chancery Lane, in
the County of Middlesex. "IMPROVEMENTS IN FIRE GRATES FOR BURNING DENSE
AND FILAMENTOUS OR FIBROUS FUEL." A communication from abroad by Alexis
Godillot, of Paris, France.
This Invention has for its object an improved construction of fire grates for
burning dense and filamentous or fibrous fuel, such as megasse or sugar cane trash,
sawdust, tan, small coal, and the like.
For this purpose the grate is constructed of sets of grate bars arranged so as to
form two or more triangular faces set up at an angle to each other and to the bed
of the furnace, with the apex resting against cither a flat vertical wall or in the
angle formed by two walls of the furnace, the grate being thus made to assume the
shape of a semi pyramid or other segment of a pyramid. The bed on which this.
grate rests is formed solid, either of brickwork or of iron, or of both combined, or
it may be a grating. The fuel is fed from an orifice or pipe in the roof of the
furnace immediately over the grate so as to fall on the apex of the latter in a thin
divided layer, whereby the particles thereof are effectually brought into contact
with the air so to become thoroughly consumed, the remaining ashes being
inade to descend gradually to the base of the grate and on to the bed, whence
they are removed from time to time by a rake introduced through the furnace door
opposite the grate. The base of the grate is so formed as to raise the lower ends
of the hare somewhat shove the bad
The accompanying Drawing shews various arrangements of fire grates constructed
according to this Invention Figs. 1 and 2 shew a sectional elevation and plan of
a grating A formed as one half of a hexagonal pyramid, -the-section being taken
through the intersection of the opposite sides, that is to say, it has three equal sized
triangular grate surfaces placed against the wall B, the bed C being of brickwork
or masonry.
In the arrangement shewn in vertical section and plan at Figs. 3 and 4 the grate
'is formed of one half of a hexagonal pyramid, the section being taken through the
middle of two opposite faces, that is to say, the two faces next the wall are one
half the area of the other two faces. The bed C is in this case formed of a strong
cast iron plate.
In the arrangement shewn in vertical section and plan at Figs. 5 and 6 the
section is taken somewhat beyond the apex of the pyramid, so that the front face
of the grate does not terminate in a point, the centre line through the apex being
situated at the dotted line a, a, Fig. 6. The bed C may be formed of brickwork
.covered with sheet iron, as shewn at Fig. 5. In the arrangement shewn in vertical
section and plan at Figs. 7 and 8 the grate A is formed of one face of a hexagonal
pyramid, and of a semi face placed in the angle of the wall.
:
In all the arrangements the fuel is fed in through the opening situated directly
over the grate, and the ashes are removed through the door E.
Having thus described the nature of the said Invention, and in what manner
the same is to be performed as communicated to me by my foreign correspondent,
I claim,―
First. Constructing grates for burning dense fuel and other kinds of fuel of a
sectional pyramidal shape, substantially as herein described.

page_text: Second. The use, in combination with pyramidal grates, of a solid bed without
openings, for the reception of the ashes passing down from the grate, substantially
as herein described.
In witness whereof, I, the said Charles Denton Abel, have hereunto set
my hand and seal, this Second day of March, in the year of our Lord One
tbousand eight hundred and eighty two.
CHA, D. ABEL.
(L.S.)