Improvements in Furnace Grates.
Year: 1899

page_text: Date of Application, 6th Dec., 1899
1900
Complete Specification Left, 4th Aug., 1900-Accepted, 6th Dec.,
PROVISIONAL SPECIFICATION.
Improvements in Furnace Grates.
I, JOHN EDWARD SLACK, of Chester Road, Manchester, in the County of
Lancaster, Mechanical Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to the grates of furnaces such as employed in steam
boilers refuse destructors or other classes of furnace and is designed to facilitate
the removal of clinker and prevent same sticking or adhering to the bars.
It consists essentially in constructing the furnace grate with steps or inden-
tations, that is to say with each alternate bar (or portion of a bar) at a higher
level than the adjacent one, or vice-versa each alternate bar (or portion of a bar)
at a lower level. The invention is particularly adapted for grates with narrow
air spaces between the bars, but may be applied to any form of grates with fixed or
stationary bars.
In carrying out the invention the grate may be constructed with each alter-
nated bar at a higher level by making the bars of two sizes or depths and placing
them in position alternately or the undersides of the bars may be made with
projections or chipping pieces which can be removed from half the bars.
In another arrangement the stretchers or rests upon which the bars are sup-
ported are made with notches or indentations at intervals the alternate bars
fitting into such notches or indentations to give the required formation of grate.
In another arrangement the bars may be cast of L or other similar shape one
part higher than the other so that when the bars are placed together in the fur-
nace they will present the two surfaces in the grate.
1
£ December 1899
WM. P. THOMPSON & Co.,
G. Bank Street, Manchester, Patent Agents.
Improvements in rur
I, JOHN EDWARD SLACK, of Chester Road, Manchester, in the County of
Lancaster, Mechanical Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention relates to the grates of furnaces such as employed in steam
boilers refuse destructors or other classes of furnace and is designed to facilitate
homoval of clinker and prevent same sticking or adhering to the bars.

page_text: It consists essentially in constructing the furnace grate with steps or inden-
tations that is to say with each alternate bar (or portion of a bar) at a higher
level than the adjacent one, or vice-versa each alternate bar (or portion of a bar)
at a lower level.
The invention is particularly adapted for grates with narrow air spaces
between the bars, but may be applied to any form of grates with fixed or
stationary bars.
Fig. 1. End elevation showing bars arranged according to the invention.
Fig. 2. Side elevation of same.
Fig. 3. Side elevation of bar showing removable chipping piece c.
Fig. 4. End elevation showing modification with bars set upon a notched
stretcher d.
Fig. 5. End elevation of modification.
Fig. 6. Side elevation of same.
As shown in Figures 1 and 2 the grate
at a higher level than the adjacent bar b.
the bars a being deeper than the bars
nately upon the stretchers a¹.
is constructed with each alternate bar a
The bars are made of two sizes or depths
and they are placed in position alter-
As shown in Fig. 3 the undersides of the bars are made with projections or
chipping pieces c which can be removed from half the bars which are then
placed alternately upon the stretchers a'.
As shown in Fig. 4 the stretchers or rests & upon which the bars b¹ are sup-
ported are made with notches or indentations dat intervals, the alternate bars
fitting into such notches to give the required formation of grate.
As shown in Figs. 5 and 6 the bars e are cast of such a shape that one part
of the face is higher than the other so that when the bars e are placed together
upon the stretchers a they will form a stepped or indented surface for the
grates.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed I declare that what I
claim is:
1. A furnace grate constructed with steps or indentations upon the surface
substantially as and for the purpose described.
2. A furnace grate constructed and arranged substantially as described.
T
.
971
1
e T 1
1000
WM. P. THOMPSON & Co.,
Manchester, Liverpool, London, and Birmingham, Patent Agents.