Improvements in the Construction of Grates and Stoves.
Year: 1892

page_text: Date of Application, 9th Sept., 1892
Complete Specification Left, 9th June, 1893-Accepted, 15th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Grates and Stoves.
I, JOSEPH MOORE, of 24 Beulah Road North, Thornton Heath, in the County
of Surrey, Doctor of Medicine, do hereby declare the nature of this invention to
be as follows:-
My invention relates to certain new and useful improvements in the construction
of a device to be combined with a grate or stove, for the purpose of consuming
smoke and preventing the escape of waste heat up the chimney or fluc.
My said invention, to some extent, consists in improvements upon the invention
for which Letters Patent were granted to me, No. 15,347 and bearing date
21st November 1884.
A
My improved device is constructed substantially in the following manner.
series of thin vertical plates, preferably formed of cast iron, are arranged parallel
to each other above the fire and under, or partly within the entrance to the chimney.
These plates are not flat but of a zig-zag or corrugated form, the corrugations
extending horizontally from front to back.
I prefer to stop the corrugations a short distance from the top of the plates,
leaving the upper parts flat. A large gap is left in the back edge of each plate and
a cast or wrought iron plate is fitted at the back of the grate, extending nearly to
the top of the plates, with a central projection fitting within the said gaps, and
provided with lugs to receive a bar, or bolt passing through all the plates to hold
them in place. The projection in the back plate may be filled with a fire brick, or
fireclay, of if preferred the whole back plate may be moulded in firebrick. A fire-
brick cheek, extending from the top of the plates to the bottom of the grate is
fitted at each side. A suitable flange is provided on the top of each plate and a
flange or lug at the bottom to keep them a sufficient distance apart. The tops of
the plates, with their flanges slope slightly upwards, to conduct the products c
combustion away through the space left above the back plate into the chimney.
The only communication between the grate and the chimney is through the
narrow passages between the plates, and by reason of their corrugated form a large
surface is provided for the absortion of heat from the products of combustion, and
for the deposit of soot. The plates soon become heated, so that the soot deposited
thereon is consumed, and none can reach the chimney, while the heat absorbed
from the escaping products of combustion is radiated back into the apartment,
instead of being lost in the usual way.
A further advantage of this device consists in the fact that it regulates the
draught of air through the chimney, and so checks any drawn draught, as to be a
complete cure for a smoky chimney, and as no soot can reach the chimney, sweeping
is rendered unnecessary. Any slight deposit left on the plates is easily removed by
passing a small brush between them.
A light vertical rib, or web may be cast on the front edge of each plate to
connect the corrugations, and I prefer to provide the grate with a hood or canopy
covering the greater part of the plates. Such hood is either hinged or removable
to permit of the plates being cleaned when necessary.
Dated this 9th day of Sentember 1892.
AMBROSE MYALL,
21, Cockspur Street, London, S.W., Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Construction of Grates and Stoves.
Í, JOSEPH MOORE, of 24 Beulah Road North, Thornton Heath, in the County
of Surrey, Doctor of Medicine, 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:
My invention relates to certain new and useful improvements in the construction
of a device to he combined with a grate, or stove, for the purpose of consuming
smoke and preventing the escape of waste heat up the chimney or flue.
My said invention, to some extent, consists in improvements upon the invention
for which Letters Patent were granted to me, No. 15,347 and bearing date
21st November 1884.
In the accompanying sheet of drawings, which forms part of this Specification,
Fig. 1, is a front elevation of an ordinary open fire grate, having my invention
applied thereto.
Fig. 2, is a back elevation of the same.
Fig. 3, is a sectional side elevation through the line A A in Figs. 1 and 2, and
Figs. 4, 5 and 6, are respectively side, front and back elevations, to an enlarged
scale, of one of the plates of which my improved device is constructed.
Similar letters of reference denote similar parts throughout the drawings.
B is the frame of the fire grate, which may be of any usual or desired pattern,
CC are the side plates of the grate and D the back plate. E E are fire brick slabs
placed at the sides of the grate, and F a fire brick slab placed at the back, in the
usual manner.
A series of thin vertical plates H, preferably formed of cast iron, are arranged
parallel to each other, above the fire and under the entrance to the chimney.
These plates are not flat, but of zig-zag or corrugated form, as shewn, the zig-zags
or corrugations extending horizontally from front to back.
The zig-zags are preferably not carried to the tops of the plates, the upper part J
being left flat.
A large gap K is left in the back edge of each plate, and a cast or wrought iron
plate L is placed at the back of the grate between the side plates C C, fitting
into the gap K, as shewn clearly in Fig. 3. A long bolt M passes through the
side plates CC and the plates H, to secure the latter in position. A flange N is
provided on one side at the top of each plate. These flanges have the effect of
keeping the said plates a proper distance apart, and also form a series of narrow
parallel channels P, sloping slightly upwards, which form the outlets for the
products of combustion into the chimney, after the said products have passed
between the plates.
The communication between the grate and the chimney is through the narrow
zig-zag passages formed between the said plates, and by reason of their corrugated
form, a large surface is provided for the absorption of heat from the products of
combustion and for the deposit of soot. The plates soon become heated, so that
the soot deposited thereon is consumed and none can reach the chimney, while the
heat absorbed from the escaping products of combustion is radiated back into the
apartment, instead of being lost by escaping up the chimney in the usual way.
A further advantage of this device consists in the fact that it regulates the
draught of air through the chimney, and so checks any down draught, as to be a
complete cure for a smoky chimney, and as no soot can reach the chimney, sweeping
is rendered unnecessary. Any slight deposit left on the plates is easily removed
by passing a small brush between them.
A light vertical rib Q may be cast on the front edge of each plate H, to connect
the corrugations and add strength to the plate, if desired.
1 prefer to provide a hood or canopy R indicated by dotted lines in Figs. 1 and 3

page_text: to cover the greater part of the plates from view, such hood may be either hinged
or removable to permit of the plates being readily cleaned when necessary.
In the back plate L, I provide rows of small slots or perforations S communicating
with the passages between the plates H, as I find in practice that such perforations
are of advantage in permitting the escape of the carbonic acid at once into the
chimney, while they do not interfere with the further combustion between the
plates of the inflammable gases and soot. The first and most important rows of
slots are made in the lower bend of the plate L, the remaining rows being placed
in the vertical portion of the plate, as shewn.
The particular pattern of zig-zag plate shewn in the accompanying drawings is
well adapted for the class of grate illustrated, but such pattern may be modified to
suit grates of different design, provided that in all cases the parts be so arranged
that the products of combustion must all pass through the aforesaid zig-zag
passages between the plates, certain of such products escaping from the said
passages through the perforations in the back plate, while the remainder, forming
the bulk of the products, escape through the parallel passages P at the top of the
plates.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim, is:-
1. In a grate or stove, a series of zig-zag or corrugated plates, forming zig-zag
or corrugated passages, through which the products of combustion pass to the
chimney.
2. In a grate or stove, a series of zig-zag or corrugated plates H, having plain
upper parts J and flanges N, substantially as and for the purpose described.
3. In a grate or stove, a series of zig-zag or corrugated plates H, in combination
with a back plate L having perforations S, and fitting into recesses in the said
plates, substantially as and for the purpose described.
4. In a grate or stove a series of zig-zag or corrugated plates H, having plain
upper parts J and flanges N, in combination with a back plate L, having
perforations S, and fitting into recesses in said plates, substantially as and for the
purpose described.
5. In a grate or stove, the combination of zig-zag or corrugated plates H, having
plain upper parts J and flanges N, a back plate L having perforations S, and
fitting into recesses in said plates, side plates C C and a bolt M, substantially as
and for the purposes described.
Dated this 9th day of June 1893.
AMBROSE MYALL,
21, Cockspur Street, London, S.W., Agent for the Applicant.