Improvements relating to the Distribution of Forced Draught in Furnaces.
Year: 1890

page_text: Date of Application, 25th Oct., 1890
Complete Specification Left, 24th July, 1891—Accepted, 29th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements relating to the Distribution of Forced Draught in
Furnaces.
I, ARTHUR CHARLES AUDEN, of The Unity Ironworks, Baker's Row, in the
County of London, Works Manager of the Hopcraft Furnace Company Limited,
do hereby declare the nature of this invention to be as follows :-
:
This invention relates to the distribution of forced draught in furnaces,; the
object being to effect more complete combustion of the fuel on the grate than
hitherto.
To carry my invention into practice I fit a tube transversely across the front of
the furnace and beneath the deadplate and connect one or both ends to the air
inlet leading from the blower or fan. This transverse tube is provided with a
suitable number of slots on that part of its surface which faces towards the fire-bars.
All the slots are by preference made with parallel sides, and with their ends rounded
or curved the terminal slots however having one of their ends tapered, the angle of
the slot nearest the inlet being more acute than the angle of the furthest slot of the
series. By this arrangement the blast will be evenly distributed along the entire
length of the dead plate and will pass up through or between the bars equally thus
preventing undue heating of any part.
Do
1
2000
CASTLE SMITH,
ແ
"Invention" Office, 54, Fleet Street, London, E.C.,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to the Distribution of Forced Draught in
Furnaces.
I, ARTHUR CHARLES AUDEN, of The Unity Ironworks, Baker's Row, in the
County of London, Works Manager of The Hopcraft Furnace Company Limited,
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 relates to the distribution of forced draught in furnaces, the
object being to effect more complete combustion of the fuel on the grate than
hitherto.
In the accompanying drawings
Figure 1 is a longitudinal section of a furnace fitted with my improved means for
distributing forced draught and
Figure 2 is a front elevation of the same.
Similar letters of reference are used to indicate the same or corresponding parts
in both figures.
The forced draught is distributed through the tube Z fitted transversely across
the front of the furnace and beneath the dead plate. The said tube Z is preferably
closed at one end and is connected at the other to the air inlet A² leading from the
blower or fan; or both ends may be connected to the air inlet if desired. The tube
s provided with a suitable number of slots B2 on that part of the surface which
faces towards the fire-bars. All the slots are by preference made with parallel
sides, and with one end rounded or curved, the other end being tapered. I prefer
o make the slots with their tapering ends at the terminals of the tube as shewn by

page_text: the dotted lines in Figure 2, and when the tube is closed at one end I make the
angle of the taper nearest the inlet A2 more acute than the angle of the taper of
the slot at the closed end of the tube Z. When, the tube is- connected at both
ends to the air inlet, the said taper is equal at both ends. More than two slots
may be arranged in a line if desired, in which case only the terminal slots will be
tapered at one end, the intermediate slots being rounded at both ends.
By this arrangement the blast will be evenly distributed along the entire length
of the dead plate and will pass up through or between the bars equally, thus
preventing undue heating of any part.
Having now particularly described and ascertained the nature of my said inven-
and in what manner the same is to be performed, I declare that what I
⚫ is :-
The means for distributing forced draught in furnaces, consisting of a tube
arranged transversely across the front of the furnace beneath the dead plate, the
said tube being provided with any suitable number of slots on the side nearest the
fire-bars and being connected to the air pipe or pipes leading from the blower or
an, substantially as herein described and shewn in the drawings.
Dated this 40th day of my lo
CASTLE SMITH,
"Invention" Office, 54, Fleet Street, London, E.C.,
Agent for the Applicant.