An Improved Process for the Construction of Tuyere Noses or Furnace Ends.
Year: 1898

page_text: Date of Application, 23rd May, 1898
Complete Specification Left. 23rd Feb.. 1899-Accepted. 6th May. 1899
PROVISIONAL SPECIFICATION.
An Improved Process for the Construction of Tuyere Noses or
Furnace Ends.
We, JOHANN KARL JACOBI, of Roth, District of Bitburg, near Treves, in the
Empire of Germany, Boiler Maker, and KARL SCHANDELER, of Esch-on-the-
Alzette, in the Grand Duchy of Luxembourg, Merchant, do hereby declare the
nature of this invention to be as follows:-
This invention relates to an improved process for the construction of tuyere
noses or furnace ends. These copper ends in the shape of a double sleeve have
been generally constructed until now by connecting an inner tube by soldering
with an exterior tube of a larger diameter having at its end an interiorly bent
flange.
In consequence of the strong heat to which the tuyeres are exposed in the
furnace, the ends generally broke through in short, time and always at the place
soldered. According to this new process, the tuyere ends are constructed of only
one piece of tube. This tube is first enlarged at one of its ends with a flaring
enlargement which is then brought down into an umbrella like form and has its
outer part again turned back in order to give to it the form of a double sleeve. The
manipulation of the material during the enlargement of the extremity of the tube
is so done that it simultaneously undergoes a shortening or thickening, thus the
parts which are exposed to the strongest heat, are considerably strengthened
which secures in the most efficacious manner these places against premature
breaking.
To make such a tuyere end the process is as follows:-A piece of copper tube
is partly inserted in a form composed of a cylindrical mandril and of a ring
provided with an annular channel in which the lower extremity of the tube is
placed.
The upper extremity of the tube is first flaringly enlarged either by com-
pression by means of appropriate mandrils or by hammering; this compression
or hammering are done so as to obtain at the same time a compression of the
material in the longitudinal direction of the walls of the tube. The pressure
on the material causes a certain thickness of the part of the tube immediately
above the ring. By pursuing the expanding operation, and by proceeding simul-
taneously in the work of pressing back or thickening the material the flaring
part becomes a slightly downwardly turned flange of the form of an umbrella or
mushroom head thickened towards the middle but gradually towards the borders.
This partly finished tuyere end is then put into a form with a longer mandril
carrying a ring which rests on the middle of the mushroom flange and prevents
deformation of this part during the operation of bending down the projecting
part of the flange.
Dated this 30-1 1 L 1000
HERBERT HADDAN & Co.,
Agents to Applicants.

page_text: An Improved Process for the Construction of Tuyere Noses or
Furnace Ends.
We, JOHANN KARL JACOBI, of Roth, District of Bitburg, near Treves, in the
Empire of Germany, Boiler Maker, and KARL SCHANDELER, of Esch-on-the-
Alzette, in the Grand Duchy of Luxemburg, Merchant, 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:-
This invention relates to an improved process for the construction of tuyere
noses or furnace ends. These copper ends in the shape of a double sleeve have
been generally constructed until now by connecting an inner tube by soldering
with an exterior tube of a larger diameter having at its end an interiorly bent
flange.
In consequence of the strong heat to which the tuyeres are exposed in the
furnace, the ends generally broke through in a short time and always at the place
soldered. According to this new process, the tuyere ends are constructed of only
one piece of tube. This tube is first enlarged at one of its ends with a flaring
enlargement which is then brought down into an umbrella like form and has its
outer part again turned back in order to give to it the form of a double sleeve. The
manipulation of the material during the enlargement of the extremity of the tube
is so done that it simultaneously undergoes a shortening or thickening, thus the
parts which are exposed to the strongest heat are considerably strengthened
which secures in the most efficacious manner these places against premature
breaking.
In the annexed drawing the successive stages of manufacture are shown in the
successive Figures 1 to 4.
To make such a tuyere end the process is as follows:--A piece of copper tube
(Fig. 1) is partly inserted in a form composed of a cylindrical mandril a and of
a ring provided with an annular channel in which the lower extremity of the
tube is placed.
The upper extremity of the tube is first flaringly enlarged either by com-
pression by means of appropriate mandrils or by hammering; this compression
or hammering is done so as to obtain at the same time a compression of the
material in the longitudinal direction of the walls of the tube. The pressure on
the material causes a certain thickness of the part of the tube immediately above
the ring b. By pursuing the expanding operation and by proceeding simul-
taneously in the work of pressing back or thickening the material the flaring
part becomes a slightly downwardly turned flange of the form of an umbrella or
mushroom head el thickened towards the middle but gradually thinning towards
the borders as shown in Fig. 3.
This partly finished tuyere end is then put into a form with a longer mandril a¹
Fig. 4 carrying a ring which rests on the middle of the mushroom flange c¹
and prevents deformation of this part during the operation of bending down the
projecting part of the flange. This ring may be held down by a key . The
turning down of the flange cand consequent reduction of its diameter towards, the
edges results in a substantial reproduction of the original thickness of the material
as shown originally in Fig. 2.

page_text: Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed we declare that what we
claim is:-
1. An improved process for the construction of tuyere noses or furnace ends
wherein a piece of tube c is partially put into an appropriate form a b and its
free end transformed into a widened umbrella like form c whilst it simul-
taneously undergoes a condensing pressure in the line of extension of the material
the thus obtained blank being then maintained on the mandril b by a ring d and
the projecting part turned back in the form of a sleeve.
Dated this 23rd day of February 1899
HERBERT HADDAN & Co.,
Agents to Applicants.
18, Buckingham Street, Strand, London.