Improvements in Furnaces and the Boilers used in connection therewith.
Year: 1893

page_text: Date of Application, 6th Dec., 1893
Complete Specification Left, 27th Jan., 1894-Accepted, 10th Mar., 1894
PROVISIONAL SPECIFICATION.
Improvements in Furnaces and the Boilers used in connection
therewith.
NICHOLAS SWANSON HAWKS, 27 Atherton Road Forest Gate London E.
do hereby declare the nature of this invention to be as follows:-
I arrange the smoke flues or tubes of a boiler so as to direct the heat being
vasted to return through, a chamber or chambers placed on the boiler sides & so
tilize the escaping gasses to heat the boiler sides & also the air supplying the
urnaces & deliver it through the dead water spaces direct under the grate bars.
The current of heated air is induced & supplied from the waste heat & from the
boiler shell & surroundings through suitable inlets into the chambers secured to
boiler sides.
COMPLETE SPECIFICATION.
Improvements in Furnaces and the Boilers used in connection
therewith.
I, NICHOLAS SWANSON HAWKS of 27 Atherton Road, Forest Gate, London, E.,
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:→
My invention has reference to furnaces and the boilers used in connection
therewith and it consists mainly of an arrangement of smoke flues or tubes in
combination with a chamber or chambers placed against the boiler sides in such
manner that the heat of the smoke and gases which would otherwise go off to
waste after passing through flues or tubes in the body of the boiler is utilized by
directing the escaping gases so that they return through flues or tubes in the said
chamber or chambers before they are allowed to pass off by the funnel. The air
for supplying the furnace or furnaces passes through the said chamber or chambers
and thence through tubes or passages in the dead water spaces of the boiler direct
to the underside of the grate bars. The gases in passing through the flues or tubes
in the chamber or chambers heat the air on its way to the furnace and also heat
the boiler sides against which the chamber or chambers are placed.
Figure 1 of the accompanying drawings is a front elevation partly in section
representing a combination of a boiler and two furnaces with my invention applied
thereto.
Figure 2 is a side elevation part of the outer wall of the air heating compartment
and uptake being broken away.
A A represent the two furnaces, B the boiler, C the combustion chamber, D the
smoke box, E E the uptakes and E¹ the funnel or chimney, F F are smoke flues or
tubes passing through the body of the boiler from the combustion chamber C to
the smoke box D. G is a vertical partition dividing the smoke box into two
compartments. H H are two air heating chambers placed respectively against the
two sides of the boiler. II are flues or tubes passing through the chambers H H
and communicating at one end with the smoke box D and at the other end with the
uptakes E. The lower ends of the chambers H H communicate by means of tubes

page_text: or passages K K in the dead water spaces of the boiler with the furnaces directly
underneath the grate bars. The upper ends of the chambers H H are supplied
with air by the induced draft of the furnace (assisted if desired by fans) through
the tubes L L which are fitted with doors or regulators M M, the said chambers
also obtain a supply of air in a more or less heated state from a tube or passage N
above the smoke box this tube having an inlet at P. QQ are doors to allow the
flues or tubes F F and II to be got at for cleaning or other purposes.
RR are
soot clearing doors and S another soot clearing door in the uptake.
It will readily be understood that the smoke and gases after passing through the
flues or tubes FF from the combustion chamber C to the smoke box D pass to
front ends of the flues or tubes II in the chambers H H and through these tubes
to the uptakes E E and thence to the funnel E' and that the air which enters the
chambers H H from the supply tubes L L and the tube N becomes highly heated
in passing through the chambers H H to the furnaces,, part of the heat being
transmitted to the boiler sides against which the chambers are placed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what mauner the same is to be performed, I declare that what I
claim in respect of furnaces and the boilers used in connection therewith is :-
1. One or more chambers on the boiler sides through which air is supplied to
the furnace or furnaces, the said chamber or chambers being fitted with flues or
tubes through which the escaping gases from flues or tubes in the body of the
boiler flow before passing to the uptake or funnel whereby these gases are utilized
to heat the air that passes through the said chamber or chambers substantially as
hereinbefore described.
2. The combination with one or more chambers on 'the boiler sides and with flues
or tubes in the said chamber or chambers as and for the purpose referred to in
Claim 1, of passages or tubes leading from the said chamber or chambers through
the dead water spaces of the boiler so as to deliver the heated air directly under-
neath the grate bars, substantially as herein before described.
3. The combination of parts in connection with furnaces and boilers, substantially
as herein before described and represented in the accompanying drawings, whereby
the air for supplying the furnaces is heated by the escaping gases.
Dated this 24th day of January 1894.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.