Improvements in or relating to Fire Grates for Furnaces, Applicable for Various Kinds of Fuel.
Year: 1889

page_text: Date of Application, 3rd Jan., 1889
Complete Specification Left, 19th Sept., 1889-Accepted, 19th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvements in or relating to Fire Grates for Furnaces, Applicable
for Various Kinds of Fuel.
A communication from abroad by HENRI PIRON, of 218, Avenue de la Reine, Brussels,
in the Kingdom of Belgium, Engineer.
I, GEORGE CECIL DYMOND, M. Inst. M.E., of the Agency for Foreign Patent
Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both in the
County of Lancaster, and 323, High Holborn, in the County of Middlesex, Patent
Agent, do hereby declare the nature of this invention to be as follows:-
This invention has for its object a fire grate for furnaces which is applicable for
various kinds of fuel.
In the accompanying drawings
Figure 1 is an elevation of one of the furnace bars of the grate, partly in
section.
Figure 2 a cross section on the line C-D, Figure 3.
Figure 3 a plan, and,
Figure 4 a longitudinal section of the grate on a smaller scale than the preceding
Figures.
The grate is composed of a series of bars of a peculiar form or construction.
In the drawings :-
a is a furnace bar of such depth that a certain portion of it will dip into a vessel
of water b, placed in the ash box or pit.
The bars have, at the top, projections or arms c on either side, with spaces
between them for the passage of air and steam. They may be of the shape shown in
the drawings, or of any other suitable analogous shape, so as to form a grate, and
to allow the largest desirable passage for air. "The bars a dip into the water contained
in the vessel, and form a series of chambers d, which terminate within the furnace
in a series of openings or pipes through which the air and the steam generated in
the chambers d, escape at a high velocity. The high temperature to which the fuel
is raised by this rapid draught of air decomposes the steam, and thus, in great measure,
increases the temperature of the furnace.
If circumstances do not permit of a reservoir of water being placed in the ash
box, it may be omitted, and instead thereof, steam may be injected into the chambers d
from the exhaust pipe of the engine or other source; the quantity of steam supplied.
should he proportional to the size of the grate.
The arrangement of the grate above described, effects a great saving of fuel, and
furthermore the bars, being constantly cooled by the water and steam, do not become
burnt or distorted in shape, and will last a very long time.
Dated this 2nd day of January 1889
WM. P. THOMPSON & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Fire Grates for Furnaces, Applicable
for Various Kinds of Fuel.
A communication from abroad by HENRI PIRON, of 218, Avenue de la Reine, Brussels,
in the Kingdom of Belgium, Engineer.
I, GEORGE CECIL DYMOND, M. Inst. M.E., of the Agency for Foreign Patent
Solicitors, 6 Lord Street. Liverpool, & 6 Bank Street, Manchester. both in the
County of Lancaster, & 323 High Holborn, in the County of Middlesex, Patent

page_text: Agent, 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 :-
This invention has for its object a fire grate for furnaces, which is applicable for
various kinds of fuel.
:-
In the drawings accompanying the Provisional Specification
Figure 1 is an elevation of one of the furnace bars of the grate, partly in
section.
Figure 2 a cross section on the line C-D, Figure 3.
Figure 3 a plan, and
Figure 4 a longitudinal section of the grate on a sinaller scale than the preceding
Figures.
The grate is composed of a series of bars of a peculiar form or construction.
In the drawings:
a is a furnace bar of such depth that a certain portion of it will dip into a vessel of
water b, placed in the ash box or pit. The bars have, at the top, projections or arms c
on either side with spaces between them for the passage of air and steam. They may
be of the shape shown in the drawings, or of any other suitable analogous shape, so
as to form a grate and to allow the largest desirable passage for air. The bars a dip
into the water contained in the vessel, and form a series of chambers d, which
terminate within the furnace in a series of openings or pipes, through which the air
and the steam, generated in the chambers d, escape at a high velocity. The high
temperature to which the fuel is raised by this rapid draught of air decomposes the
steam, and thus, in great measure, increases the temperature of the furnace.
If circumstances do not permit of a reservoir of water being placed in the ash box,
it may be omitted, and instead thereof steam may be injected into the chambers d
from the exhaust pipe of the engine or other source; the quantity of steam supplied
should be proportional to the size of the grate.
The arrangement of the grate above described effects a great saving
furthermore, the bars, being constantly cooled by the water and steam, do not become
burnt or distorted in shape, and will last a very long time.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign oorrespondent, I declare that what I claim is :-
1. The improved fire grate for furnaces, formed of bars, the entire centre portions
of which are sufficiently deep to reach almost to the bottom of the ash box, and the
upper portions of which form a series of projections on both sides with passages
between for the air, so as to form a series of chambers terminating in nozzles,
substantially as and for the purposes described.
2. In combination with the grate bars mentioned in claim 1, an ash box furnished
with a water reservoir into which the deepened parts of the bars are plunged.
3. In combination with the grate bars mentioned in claim 1, the combined application
of air and jets of steam for the object mentioned.
Dated this 18th day of September 1889.
WM. P. THOMPSON & Co.,
Agents for the Applicant.