Improvement in and relating to Kilns.
Year: 1899

page_text: Date of Application, 16th Jan., 1899-Accepted, 11th Mar., 1899
COMPLETE SPECIFICATION.
Improvement in and relating to Kilns.
I, OTTO WUNDRACK, Manufacturer, of Krahnenufer, Trier, in the Kingdom
of Prussia, Germany, 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 invention in question relates to an improvement in the construction of
kilns, which has the purpose to make it possible, that the material, which is set
into the kiln, may be burnt very equally.
The annexed sheet of drawing represents a number of kilns, which are con-
structed in the new manner and which are combined, as already in use, in such
a manner, that from the foregoing kiln, in which anneals the burnt material, hot
air is conducted into the next kiln, which is on fire, while in the same time the
gases, escaping from the latter, enter into the next (third) kiln, thus heating
the material contained therein.
Figure 1 of the drawing represents a longitudinal section through three kilns,
which are combined, Figure 2 shows a section according to the dotted line x-y
of Figure 1 and Figure 3 finally represents the ground plan of a group of (for
example) eight kilns. Supposed, that the material to be burnt is set in into the
kiln I and that the fuel is set on fire, the kiln receives the air, which is necessary,
that the fuel, being upon the grate a may be consumed by fire, from the kiln VIII.
(Fig. 3).
This air firstly comes from the kiln VIII, into the collecting-room band from
this by a number of six radially arranged channels e, situated below the grates a
in the midst of channels e, which are separated from each other by bridges d.
In these channels e the air spreads very equally to both sides and effects by this,
that the earthen material, contained in the kiln, is very equally burnt.
The flames and the gases now rise along the walls of the kiln and get through
the earthen material contained in the kiln into the ring-shaped channel f, which
is situated in the midst of the bottom of the kiln, respectively into the channel g,
which is connected with the channel f.
From the channel f the gases get through a channel h, into the collecting
room of the kiln II, which is till now not set on fire, and get from again
through the six radially arranged channels c of this kiln into the channels e,
arranged below the grates a, thus heating the grates in such a manner, that the
fuel, brought thereupon, takes fire spontaneously.
In the kiln II the same process takes place as described before and the gases
are conducted in the same manner below the grates of kiln III.
It is therefore possible to combine any number of kilns of the new construction
so that a continual working may take place.
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 kiln for the burning of earthen materials, distinguished by the arrangement
of a number of channels (c) for the conduct of hot air, which have their beginning

page_text: in a collecting-room (b) situated below the centre of the kiln's bottom and which
lead to channels (e) provided below the grates (a) and separated from each other
by bridges (d) and distinguished by the arrangement of a ring-shaped channel (f)
in the centre of the bottom for the purpose of leading off the gases.
Dated this 12th day of January 1899.
For OTTO WUNDRACK,
A. Ittenbach.