Improvements in Glass Furnaces.
Year: 1892

page_text: Date of Application, 10th Sept., 1892
Complete Specification Left, 10th June, 1893-Accepted, 26th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Glass Furnaces.
I, PAUL SIEVERT of 104 Dresdner Strasse, Döhlen near Dresden, in the
Kingdom of Saxony, German Empire, Glass Manufacturer, do hereby declare the
nature of this invention to be as follows:-
-
The object of this invention, which relates to glass furnaces in which two or more
chambers are connected by bridges with partition walls, is so to construct such
bridges, that the molten mass passing over may be more or less cooled.
To this end, the bridge is formed with a central hollow transverse partition
standing up from the bridge.
A hollow transverse partition also depends from the roof, while a third
hollow partition extends from side to side, so as to leave a space both below and
above it.
The molten metal passes under and over these hollow partitions, which are kept
cooled in any convenient manner, so that the mass is cooled down more or less as it
passes across the bridge.
Dated this 10th day at Contrato 1000
NEWTON & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Glass Furnaces.
I PAUL SIEVERT of 104 Dresdner Strasse, Döhlen near Dresden, in the
Kingdom of Saxony, German Empire, Glass Manufacturer, 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 :-
In the melting tanks for treating molten masses of glass, partition walls and
bridges in close peoximity to each other within the tank are employed, and these
walls and bridges have this material disadvantage, that they are subject to rapid
wear and tear, or destruction, by the heat, as well as by the melting or molten
mass, the result being that, due to the large dimensions of such partitions and
bridges (that is to say, covering the entire width of the melting tank), a proper
cooling of so constructed tanks can hardly be carried through to the desired extent.
The defects set forth above are increased by the further disadvantages, that a large
part of the material used for constructing such partitions and bridges, melts away,
and becomes transfused in the melting mass, thus polluting the same.
The repairing of these walls or bridges is only possible when the melting tank
is in a perfectly cool state, and therefore such repairing cannot be done during
working. Furthermore, with the continuously working tanks hitherto in use, it is
rather difficult, especially in glass melting tanks, to uniformly cool down the molten
mass, that is to say, to uniformly reduce the mass from the melting heat to the
proper heat for working.
Now, the present invention has for its object, to do away with all these
disadvantages arising from the arrangement of the constructions within the melting
space of the melting tank, and at the same time to allow of uniformly cooling down
the molten mass, from the melting heat to the proper working heat.
In order to obtain this object. I arrange (as shown in the annexed drawing) at
the side of the oven of the melting tank, or intermediate between two ovens,ran
dit-

page_text: exit or connecting portion or passage, as shewn in the sectional views, Figs. A, B,
and C, Fig. A being a vertical section on the line m, n, of Fig. B, and Fig. Ba
sectional plan on the line h, i, of Fig. A. Fig. C shows a modification in vertical
section.
The connecting portion or passage L may be of narrow width, and will contain
the bridges or partition walls hitherto placed within the melting tank. The
arrangement of such connecting passages may, for example, be the following,
referring to Figs. A and B.
The small compartment V1 of the passage L, next or adjacent to the melting
tank W, is kept at an uniform temperature by the heat from the said melting tank,
and from this compartment V the molten mass, at its bottom, will pass through the
opening underneath the partition wall a, into the second compartment V². In this
compartment, the molten mass will rise, and flow over the bridge b, into a third
compartment V**, from which the mass will pass underneath the partition wall c,
either into a second tank, by means of the opening V³ (Figs. A and B), or into a
suitable receptacle (Fig. C). This last mentioned arrangement may be preferably
used, if the molten mass consists of soluble silicates, which simply have to flow out.
In such case, a receptacle carried by a trolley, or mounted on wheels, may be used
to receive the molten mass, or an endless travelling band of suitable material may
be employed, to receive the molten mass, and to carry it to the place of destination.
During such transport or delivery by the endless travelling band, the mass will
cool down, and will break into pieces on leaving the endless band. In treating
soluble silicates, the mass may be directly delivered into tanks filled with water, in
order to dissolve, stirrers in the tanks being employed to aid the dissolution.
case of molten glass, which has to undergo further treatment, or for working the
glass by blowing or pressing process, the molten glass may be delivered into a
second furnace or tank, as illustrated with reference to Figs. A and B.
In
When it is intended to work the glass into glass articles, the tank W'is connected,
by the above described passage, with a second tank W".
This latter tank W may be provided, in the usual and well known manner,
with partition wall and bridges, in order to allow the molten glass to settle, or to
refiuc.
It is well known that the molten glass must have a lower temperature for
working glass articles, than that of the mass during the melting operation, therefore
the partitions and bridges in the second or working tank are less liable to destruction
by heat, and therefore in many cases cooling devices for cooling such partitions and
bridges in the working tank may be dispensed with.
If two tank ovens are connected in the manner above described and illustrated
in Figs. A and B of the drawing, the compartments V2 V2 and V³ of the inter-
mediate construction L are heated by the heat of the tank oven W", so that 4
stopping of communication in the molten mass between W' and W" will not take
place. The compartments V1 V2, V2* and V3 may, besides this, be connected by
a channel X with a chimney, in order to cause a draught in the compartments for
drawing in heat from the ovens. It will be obvious that the arrangement of bridges
and partition walls, both as regards their number and their succession, may be
varied according to circumstances, as will be seen in Fig. C.
The inolten mass in the tank W, on its way to the tank W through passage L,
will assume the necessary reduced temperature suitable for the working purposes in
tank W. As the partitions and bridges a. b. c. are of short length only, they
will, in cousequence of the free and exposed position of the passage L, be subject
to extensive cooling from all sides, which cooling may be increased by making
them hollow, so as to form cooling flues K, which may end in the chimney,
thus reducing the wear and tear of the parts a, b, c, to a minimum.
Again, any necessary repair in the bridges and partition walls, can, in consequence
of the free and exposed position of the passage L, be easily effected after tapping 5
the tanks W and W", without necessitating the entire cooling down of these
tanks.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The means for cooling molten masses from melting tanks, characterised by
arranging, outside of such tanks, an exit or a connecting passage or passages having
bridges or partition walls, or bridges and partition walls, which are subject to
cooling, and over which bridges, and underneath which partition walls, the molten
masses are caused to run, substantially as set forth.
2. The method of cooling down molten masses from the melting heat to a
reduced temperature, by employing the means specified in Claim 1, the molten
masses running from the melting tank underneath and over partition walls and
bridges, which are arranged outside the melting tank, and which are subject, or
exposed, to a cooling medium, as set forth.
3. Combining melting tanks or ovens with refining tanks or ovens, or working-
out tanks or ovens, by the means specified in Claim 1, by which the molten
masses are conducted from one oven or tank into the other oven or tank, as set
forth.
Dated this 8th day of June 1802
NEWTON & SON,
Agents for the Applicant.