Combined Bar or Ingot and Sheet Metal Heating Furnace.
Year: 1895

page_text: Date of Application, 15th Mar., 1895-Accepted, 15th June, 1895
Combined Bar or Ingot and Sheet Metal Heating Furnace.
I, BRUNO VERSEN of Dortmund, Germany, Engineer, 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 main object of this invention is to utilise the excess heat given off near the
fire places of furnaces in which sheet metal plates are heated. For this purpose
one or more front heating chambers or hearths is or are constructed between the
fire place and the high fire bridge, in which chamber or chambers the metal bars
or ingots are heated to the required degree for undergoing the rolling process
simultaneously with the heating of the sheet metal plates. In practice however
this construction can only be of value when the heating of the crude bars or
ingots can be heated independently of the heating of the metal sheets, in order that
with different sizes or thicknesses of bars or ingots the heating of these may be
made to conformn with the heating of the plates or sheets.
In the drawing
Figs. 1 and 2 are respectively a longitudinal vertical section and a sectional plan
of the combined bar or ingot and sheet metal heating furnace of this invention with
one front heating chamber for bars or ingots.
Fig. 3 is a similar view to Fig. 1 but with two front heating chambers.
a, a', are front heating chambers or hearths, b roof over the same, flue apertures
arranged in the second fire bridge and adjustable as regards their area either
singly or after their junction together by slides or a slide said flue apertures
drawing a portion of the furnace gases down on to the bars or ingots and thus
heating these to the required degree.
It is very desirable especially for heating thick bars or ingots to supply hot air
to the flames for the purpose of greatly increasing the heat to which end a closeable
air passage (Fig. 3) is arranged in the front fire bridge. These oxidising flames
and also any air penetrating past leaky closed charging doors or through the
charging apertures when such doors are open, should be carefully prevented from
reaching the main hearth and thereby damaging the metal sheets placed thereon.
The roof serves this purpose.
In order to lessen the length of the furnace when two front bar or ingot heating
chambers are required these chambers are arranged one over the other and are
heated in succession by the same flames (Fig. 3).
The suppression of a special bar or ingot heating furnace considerably facilitates
operations, effects a saving in fuel and wages and yields sheet metal of a quality
equal to the best obtained by the best means hitherto employed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is:-
1. In sheet metal heating furnaces with one, or with two front heating chambers
or hearths located one over the other, the regulation of the temperature for heating
the bars or ingots placed therein by means of direct flue passages formed in the
fire bridge (Fig. 1) or fire bridges (Fig. 3) and having their area adjustable by one
or more slides s, thereby enabling any suitable temperature to be directed upon the
bars or ingots, substantially as described and shewn.

page_text: 2. In the furnace referred to, the air passage wo formed in the front fire bridge
for supplying auxiliary air to the front heating chambers or hearths, substantially
as described and shewn.
3. In the furnace referred to, the provision of a protecting roof b over the front
heating chamber to prevent the passage of oxidising flames or the passage of
outside air to the main hearth, substantially as described and shewn.
Dated this 15th day of March 1895.
CAPITAINE & Vox HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.