Year: 1897

page_text: Date of Application, 17th Dec., 1897-Accepted, 29th Jan., 1898
I, WILHELM BURSIAN, of, Dürrgoy, near Breslau, in the German Empire, Master
Builder, 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 an improved construction of closed stove, to be supplied
with fuel from the top, and which is characterised by a tubular fire-box having
a larger diameter at the bottom than at the top and by an annular chamber
surrounding the fire-box and separated therefrom by an air space. The pro-
ducts of combustion are led direct from the fire-box to the annular
chamber around which they are compelled to travel as hereinafter
described, and finally escape to the chimney. Air passes through the air chamber
between the fire-box and the annular chamber and thus becomes thoroughly
heated.
In stoves of this type as at present constructed, the fire-boxes are cylindrical
and the gases pass either direct therefrom to the chimney or to a chamber in
close proximity with the fire-box. Thus, at present, the heat arising from the
burning fuel is not advantageously utilised, whilst the form of the fire-box per-
mits bituminous fuel to adhere to the upper part of its wall, so that the fuel
scaffolds" and a void space is left between it and the grate. Moreover, the gases
are found to deposit soot and ash in the passages which rapidly obstruct them and
interfere with the draught. Hence, the burning of coal in stoves of this descrip-
tion has hitherto been precluded, because of the large flue area necessary for
that purpose. I avoid these disadvantages by my present improvements which
are illustrated by the accompanying drawings in which; -
Figure 1 shews a vertical section.
Figure 2 a second vertical section taken at right angles to Figure 1.
Figure 3 a cross section taken along the line A-B, Figure 1, and
Figure 4, another cross section taken along the line CD.
The conical fire-box a has its larger diameter next to the grate g. Around it
there is arranged the annular chamber b, with which it communicates by the short
flue or tube c. In the annular chamber there are any convenient number of
baffle plates, conveniently three as shewn, and a vertical partition. This par-
tition and the baffle plates add divide the annular chamber into the com-
partments eee. The partition separates entirely the compartments e¹
and e, whilst the remaining compartments communicate with each other succes-
sively above and below successive baffle plates. Thus the hot gases from the
fire-box have to take the course indicated by the arrows through the flue c, into
the compartment el, under the baffle plate 2, over the plate d³, under the plate (+
and out to the chimney through the flue f. This long passage of the gases
ensures a complete utilisation of the heat contained in them.
The construction and arrangement of the air heating space between the fire-
box and the annular chamber provides a large and effective heating surface.
Openings for the inlet and exit of the air may be provided as at k and 7.

page_text: As a result of the herein before described construction and arrangement of
my improved stove, the fuel cannot adhere to the wall of the fire-box, so that
ordinary coal may be used, and will burn uniformly.
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:
A stove having a conical fire-box separated by an air space from a surrounding
annular chamber divided by a vertical partition and separated into compartments.
by battle plates, constructed and arranged substantially as hereinbefore described
and as illustrated by the accompanying drawings.
Ta
1011
1007
W. E. HEYS & SON,
Agents for the Applicant.