Improvements in and relating to Funnels of Furnaces and Stoves.
Year: 1896

page_text: Date of Application, 28th Oct., 1896-Accepted, 28th Nov., 1896
COMPLETE SPECIFICATION.
.Improvements in and relating to Funnels of Furnaces and Stoves.
I, JOHANNES TOBIAS VAN HATTUM, of Delft, Holland, Manufacturer, do
hereby declare the nature of my invention, and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement, that is to say :-
This invention has reference to and comprises an improved construction and
arrangement of the side channels and fittings in connection with the funnels of
furnaces described in the Specification of Kok's Patent No. 17174 of 1894, in
order to obtain a combustion and draught superior to the appliances heretofore in
use for this purpose.
And in order that my said invention may be properly understood I have hereunto
appended an explanatory drawing in which the same reference letters are used to
indicate corresponding parts in the figures where shown.
Figure 1 is a side elevation of the apparatus.
Figure 2 is a sectional elevation of the apparatus.
Figure 3 is a front elevation of the apparatus.
Figure 4 is a sectional plan on line 1-1 of Figure 1.
Figure 5 is a side elevation of the piece C in the inner space of the apparatus,
Figure 2.
Figure 6 is a front elevation of the piece C.
Figure 7 is an elevation of the apparatus as it may be applied to a furnace or
stove.
The improved apparatus consists of a pipe or tube A of circular or other shaped
section, bearing a chest B. The flat side planes of this chest are made in one
piece with the barrel of pipe A. The front side of the chest is closed with a
plate abde which is rivetted with its flanges to the sides of B. A curved plate
or strip bed is rivetted to the inner side of plate a b d e. In the inner space of
chest B is arranged a piece C composed of two plates or strips f g h and k l. This
piece C is rivetted with flanges to the inside of the side plates of chest B before the
plate a b de is brought into place. Figure 5 shows the separate piece C composed
of the strips f g h and kl with their flanges. Figure 6 shows the strip or plate kl
which is straight in its longitudinal direction but curved in its cross section
concentric with pipe A.
The chest B with the piece C fastened in its inner space thus forms a curved
sideway channel, the section whereof is about one third of the section of the
pipe A. D is a valve which may shut off the opening of the pipe A above
the lower entrance of the sideway channel B. When closed, this valve has an
oblique position. Valve D is provided outside the chest with a key to move it.
Within the channel a second valve E is arranged, by which the opening of this
channel also may be varied. This valve E however can only be manipulated by
the manufacturer or his representative, the spindle being of particular form so that
a key of a shape agreeing with it, is necessary to move it.
In normal position the valve D is closed, and the valve E is full open. The
smoke is thus forced to pass the sideway channel, and this arrangement has proved
to give a great saving of fuel.
When starting the fire the valve D may be opened more or less in order to
facilitate the flow of the gases until the fire and the draught are normal.

page_text: The undermost entrance of the sideway channel is somewhat enlarged and has a
sloping direction in order to give an easy way for the smoke gases.
The apparatus may be applied in all kinds of furnaces: It may be used in
combination with all other kinds of arrangements to regulate the draught or to
improve the economy of combustion. It may also be applied to furnaces for all
kinds of fuel.
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 :-
First. In connection with the funnels of furnaces or stoves, the improved
construction and arrangement of sideway channel for the passage of the smoke
or gases, substantially as herein described in reference to and shown in the
accompanying drawings.
Second. In connection with the funnels of furnaces or stoves the combination
comprising a funnel or pipe provided with a valve, a sideway channel or chest of
square section with curved plates in inner space and a valve located in said space
only actuated by a special key, substantially as and for the purposes herein described,
in reference to and shown in the accompanying drawings.
Dated the 27th day of October 1896.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.