Combined Heating Furnace for Mill-bars, Sheet-iron, and Steel.
Year: 1894

page_text: Date of Application, 20th Aug., 1894-Accepted, 3rd Nov., 1894
COMPLETE
SPECIFICATION.
Combined Heating Furnace for Mill-bars, Sheet-iron, and Steel.
I, JOHANNES IMMEL, of Geisweid in the Kingdom of Prussia, German Empire,
Foreman 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 object of my present invention is a heating-furnace in which at the same
time mill-bars as well as slab-plates can be heated and glowed ready for further
manufacture.
The accompanying drawing shows the new furnace in the Figs. 1 to 3 viz.
Fig. 1 shows the furnace in longitudinal section,
Fig. 2 is half of the plan of the same, and
Fig. 3 is a section according to the line of Fig. 1.
As is known, all mill-bars destined for the manufacture of plate, were till now
heated in the ordinary plate and mill-bar heating-furnace. With this method the
furnace could not be used for any other purpose during the heating of the mill-
bars, and the plates could be heated and glowed in the same furnace, for further
manufacture, only in a 2nd, 3rd or 4th charge and so on, after the mill-bars had
been removed out of the furnace. Or in the same works separate mill-bar.
heating-furnaces were kept which were used exclusively for the heating of mill-bars,
but which became a deal too expensive in consequence of the consumption of very
much coal, also through the special attendance required and the increased waste of
the mill-bars.
All these draw-backs are entirely done. away with by the employment of my
new combined mill-bar and plate heating-furnace. The bearth (b) of the old
heating-furnace, which, as is known, has behind the fire-bridge (e) the vault (c)
which guards against the scorifying of the plates on the rear half of the furnace,
is provided with a second hearth (a). This is attained by the upper vault-surface
of c being worked out with a plane surface as a new sole of and made accessible
from one side of the furnace, according to the local circumstances, by the
arrangement of a door d or d', for the beating mill-bars (p) to be placed on.
This new combined mill-bar and plate heating-furnace works as follows:
The hearth or the sole of the chamber (b) is laid out with plates of sheet-iron
which are heated and glowed ready for manufacture by the heating-gases
developed at the left on the grater, beating over the fire-bridge (e), and drawing
through the chambers a and b. During this time, mill-bars (p) are placed in
layers on the chamber-sole (a) and become thus, in the chamber a perfectly heated
ready to be further worked, at the same time the glowed plates are taken out of
the chamber b ready for rolling, so that with this heating-furnace working can be
continued without interruption.
A smaller construction of the same furnace can also be employed, in the same
manner, with great advantage, for the preparation of steel.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
A combined heating-furnace for mill-bars, sheet-iron, and steel, permitting of
1. Heating the mill-bars and the plates ready for further manufacture and the
glowing of the plates at the same time, with the same heating-gases developed on
the same grate, distinguished by the arrangement of a separate mill-bar heating-
chamber a with a door d.

page_text: 2. Of being used in the same manner as steel heating-furnace for the manufacture
of steel, substantially as described.
Dated this 7th day of July 1894
MAY WERTHEIM,
Agent for Applicant.