Year: 1886

page_text: I, DENNIS MELLOR, of Beeston Road, Lenton, Nottingham, Engineer do hereby
declare the nature of this invention to be as follows:-
The object of my invention is to construct furnace fire bars in such a manner that
they may last longer than ordinary bars, diminish the labour of stoking, and effect
the consumption of smoke as it leaves the furnace, thereby rendering them more
economical than those now in use, and also getting rid of what is at the present
time a nuisance, namely, the emission of dense volumes of smoke from the
chimney.
For this purpose I construct my fire bar hollow, that is to say in transverse
section of the form of a hollow rectangle. If desired the inner surface of the bar.
may be lined with steel. The bottom edge of the bar near the door of the furnace
is carried a sufficient distance below the dead plate to allow the cold air from the
exterior of the furnace to enter the orifice, which is bell shaped in preference, and
thus pass through the bar. The other end of the bar is carried completely through
the bridge and discharges the air through the open end of the bar at the back of
the furnace..
The cold air taken into the bar at the door end keeps the bar cool, and in its
passage through the bar becomes heated sufficiently to consume the smoke it meets
on emission at the rear of the furnace.
Each bar is grooved on the upper surface to allow dust to settle and thus prevent
clinker from adhering to the bar.
Corrugations of metal may be attached to and under the bar to delay somewhat
the passage of air, which is employed in the furnace for combustion, through
the bars.
To prevent warping and to give additional strength, I preferably construct the
the bars three or more together.

page_text: COMPLETE SPECIFICATION.
Improvements in Furnace Fire Bars.
I, DENNIS MELLOR, of 92 Radford Boulevard, Nottingham, in the County of
Nottinghamshire, Engineer 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:-
The object of my invention is to construct furnace fire bars in such a manner,
that they may last longer than ordinary bars, diminish the labour of stoking, and
effect the consumption of smoke as it leaves the furnace, thereby rendering them
more economical than those now in use and also getting rid of what is at the
present time a great nuisance, namely, the emission of dense volumes of smoke
from the chimney.
For this purpose I construct my fire bars hollow, that is to say, in transverse
section of the form of a hollow rectangle. If desired the inner surface of the bar
may be lined with steel, to be cast in the bar, or to be afterwards fitted in. The
bottom edge of the bar near the door of the furnace is carried a sufficient distance
below the dead-plate to allow the cold air from the exterior of the furnace to enter
the air passage by an enlarged orifice. The other end of the bar is carried com-
pletely through the bridge and discharges the air through the open bar at the back
of the bridge. The cold air taken into the bar at the door end keeps the bar cool,
and in its passage becomes itself sufficiently heated to consume the smoke it meets
on emission at the rear of the furnace. Each bar may be grooved on the upper
surface to allow dust to settle, and thus prevent clinkers from adhering to the bars.
Corrugations of metal may be attached to and under the bar to delay somewhat
the passage of air, employed in the furnace for combustion, through the bars.
To prevent warping and to give additional strength, I preferably construct the
bars two or more together.
To shew how my invention may be carried into effect, I furnish drawings in
which similar letters represent corresponding parts in all the figures.
Fig. 1 is a longitudinal section of fire bar.
Fig. 2 is a plan from above of two bars joined together.
Fig. 3 is a plan from below, of two bars joined together.
Fig. 4 is a front end elevation of bars.
Fig. 5 is a transverse section of two bars joined together.
A is the junction of two segments of a bar.
B is the enlarged orifice at entrance of air passage.
C corrugations beneath bars.
D groove on upper surface of bar,
E air passage through bar.
F end of bar at bridge.
G is the steel lining of the bars.
H is the attachment of lip-plate or air guide.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1st. The peculiar section of the air passage in the bar as herein described.
2nd. The lining of the inner surface of the bar with steel to be cast in the bar
or to be afterwards fitted in,
3rd. The position and shape of the air entrance to the bar, by which the air has
free access from under the dead-plate.