Year: 1886

page_text: I FRIEDRICH AUGUST HERBERTZ of Cologne on the Rhine, Germany, Manu-
facturer do hereby declare the nature of this invention to be as follows:-
According to my invention the furnace shaft proper is supported by columns say
four and is stationary while the hearth by means of screw spindles and wheels can
be taken on and off from the columns. The mouth of the furnace is closed by
a movable bell shaped cap and the charge for the furnace is placed on so that the
space between the bell and the funnel shaped opening of the mouth is filled up.
On drawing up the bell the charge falls into the furnace and the cap is then again
lowered down. On the upper chamber of the furnace shaft there are suction pipes
in which a steam injector is so fixed that a double injector and thereby induced
double suction is produced.
Between the lower edge of the furnace shaft and the upper edge of the hearth
there is an adjustable annular air inlet orifice. Over this annular orifice there is a
row of round holes the principal object of which is to observe the progress of the
smelting.
•
The action of the furnace is such that by the suction of the steam injector a
vacuum is produced in the shaft whereby atmospheric air is admitted in like
proportion into the furnace through the annular orifice thereby consuming the fuel
and smelting the iron or other metal in like proportion.
The advantages of this smelting furnace are r
1. The omission of mechanical arrangements.
3
2. There is no flying out whatever of sparks or ashes and no visible flames from
the mouth.
3. Considerable economy of fuel.
4. The production of clean soft iron.
5. Reduced loss by burning.
5

page_text: I, FRIEDRICH August Herbertz, of Cologne on the Rhine, Germany, Manu-
facturer, 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 will be best understood by reference to the accompanying drawing
which represents in sectional elevation a cupola smelting furnace constructed in
accordance therewith.
. The furnace shaft 8 is supported by columns, say four, and is stationary, while
the hearth by means of screw spindles p passing through nuts m and regulating
wheels r, can be taken on and off from the columns. The mouth of the furnace is
closed by a movable bell shaped cap and the charge for the furnace is placed on
so that the space between the bell shaped cap g and the hopper t is filled up. On
lifting the bell cap the charge falls into the furnace and the bell cap is then again
, lowered.
On the upper chamber of the furnace shaft s there are suction pipes a and a¹ in
which a steam injector i is so fixed that a double injector i and is formed and a
double suction thereby induced.
Between the lower edge of the furnace shafts and the upper edge of the hearth
there is an adjustable annular air inlet orifice o. Over or above this annular orifice
there is a row of round or other shaped holes which principally serve to enable the
progress of the smelting to be observed.
The action of the furnace is such that by the suction of the steam injectors a
vacuum is produced in the shaft s whereby atmospheric air is admitted in like
proportion into the furnace through the annular orifice o thereby consuming the
fuel and smelting the iron or other metal in like proportion.
The advantages of this smelting furnace are:
1. The omission of all mechanical arrangements.
2. There is no flying out of sparks or ashes whatever, and no visible flames from
the mouth.
3. Considerable economy of fuel..
4. Clean soft iron is produced.
5. A minimum loss by burning.
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 :-
In cupola smelting furnaces the adjustable annular air inlet orifice o in connection
with the removable hearth h; and the suction pipes a and a¹ for producing a double
suction action by means of a steam jet, substantially as hereinbefore set forth and
BREWER & SON,
For the Applicant.