IMPROVED APPARATUS FOR ADMITTING AND REGULATING THE BLAST OF AIR IN CUPOLAS AND OTHER SIMILAR MELTING OR SMELTING FURNACES
Year: 1882

page_text: LETTERS PATENT to Cowen Landreth, and Isidoro Renis, both of Valencia, in
the Kingdom of Spain for an Invention of IMPROVED APPARATUS FOR
ADMITTING AND REGULATING THE BLAST OF AIR IN CUPOLAS AND OTHER
SIMILAR MELTING OR SMELTING FURNACES
PROVISIONAL SPECIFICATION left by the said Cowen Landreth and
Isidoro Renis at the Office of the Commissioners of Patents on the
27th October 1882,
"
COWEN LANDRETH and ISIDORO RENIS, both of Valencia in the Kingdom of
Spain IMPROVED APPARATUS FOR ADMITTING AND REGULATING THE BLAST OF
AIR IN CUPOLAS AND OTHER SIMILAR MELTING OR SMELTING FURNACES,"
"
The object of the present invention is to facilitate the fusion of the metal in the
furnace, to effect such fusion more economically, and to enable the action of the
furnace to be more effectually regulated than has been possible by the arrange-
ments heretofore in use. It consists of the following arrangements of apparatus.
The tuyers are placed in groups at intervals round the circumference of the
cupola or other similar furnace; those of each group being by preference arranged
in three tiers one above the other. The number of tuyers employed is dependent
upon the size of the furnace; in a small cupola two groups of three each will be
found sufficient; for a larger cupola three groups of three each, and so on; but each
group may consist of any other suitable or convenient number of tuyers. There is
fixed in front of each group of tuyers a blowing chamber which may be of either
wrought or cast iron, bolted or otherwise secured to the outside of the cupola.
Each of these chambers receives air from the blowing machine by a pipe either leading
direct therefrom or from a general air supply pipe or trunk. Through the back of
each of the aforesaid blowing chambers are formed openings which come opposite
to, and correspond with, the tuyers which conduct the air from the said blowing
chamber into the furnace. Over each of these openings is arranged a sliding
register or valve furnished with a hole covered by a piece of glass through which

page_text: the state of the furnace can be inspected when the said registers or valves are
closed. In front of each of the tuyers, that is, at the ends thereof which open into
the blowing chamber, is also fitted a sliding register or valve by which the amount
of air admitted to each tuyer may be regulated through the corresponding opening
in the back of the blowing chamber when the register or valve which covers the
same is drawn aside. By closing or opening more or less the registers or valves
covering the ends of the tuyers the action of the furnace can be regulated as
desired, so as to facilitate the melting of the metal, and to vary the capacity of
the furnace according to whether a small or large quantity of metal is required to
be run.
The apparatus can readily be adapted to any ordinary cupola or similar furnace,
and by its use a considerable economy is effected in the consumption of fuel as
compared with ordinary cupolas, a greater quantity of metal is melted in the same
time, greater facility and convenience in working the furnace is attained, the castings
are less carburetted, and the combustible gases, which in the ordinary cupola escape
through the chimney, are consumed and utilized by means of the air admitted
through the upper valves.
When commencing to blow it is found most advantageous to fully open the two
lower tiers of valves and to half open the upper tier, until the first charge is
melted, when the latter may be completely opened, and when finishing the blow
they should be quite closed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Cowen Landreth and Isidoro Renis in the Great Seal Patent Office on
the 26th April 1883.
COWEN LANDRETH and ISIDORO RENIS, both of Valencia, in the Kingdom of
Spain "IMPROVED APPARATUS FOR ADMITTING AND REGULATING THE BLAST OF
AIR IN CUPOLAS AND OTHER SIMILAR MELTING OR SMELTING FURNACES."
The object of the present invention is to facilitate the fusion of the metal in the
furnace, to effect such fusion more economically, and to enable the action of the
furnace to be more effectually regulated than has been possible by the arrangements
heretofore in use.
It consists of the following arrangements of apparatus. The tuyers are placed
in groups at intervals round the circumference of the cupola or other similar
furnace; each group being arranged one above the other, either in regular tiers, or
irregularly disposed, as may be best suited to the furnace. The number of tuyers
employed is dependent upon the size of the furnace; in a small cupola or furnace
for example, two groups of three tuyers each will be found sufficient; for a larger
cupola or furnace three groups of three or more each, and so on.
But each group
may consist of any other suitable or convenient number of tuyers.
In front of each group of tuyers there is fixed a blowing chamber of any suitable
form, and which may be of wrought or cast iron, or any other suitable material,
bolted or otherwise secured to the outside of the cupola or furnace. Each of these
chambers receives air from the blowing machine by a pipe leading either direct
therefrom, or from a general air supply pipe or trunk. Through the back of each
of the aforesaid blowing chambers are formed openings, which come opposite to,
and correspond with, the tuyers which conduct the air from the said blowing
chamber into the furnace. Over each of these openings is arranged a sliding
register or valve, furnished with a hole covered by a piece of glass, through which
the state of the furnace can be inspected when the said registers or valves are
closed. In front of each of the tuyers, that is, at the ends thereof which open into
the blowing chamber, is also fitted a sliding register or valve, by which the amount
of air admitted to each tuyer may be regulated through the corresponding opening
in the back of the blowing chamber when the register or valve which covers the
same is drawn aside.
The accompanying Drawings représent so much of a cupola or blast furnace as is
necessary to illustrate the application of this invention, Figure 1 being an elevation,
Figure 2 a transverse section, and Figure 3 a sectional plan. Similar letters refer
to like parts in each of the Figures. A are the tuyers placed in groups round the
circumference of the cupola B, and which are shewn, for the purpose of illustra-
tion, in three groups of three single tiers each, but each group may consist of more
than one tier of tuyers, or they may be irregularly disposed as before stated. For
example five tuyers may be arranged in connection with one blowing chamber, the
lower tiers consisting of two tuyers each, and the fifth tuyer being above the two
tiers. C are the blowing chambers, secured to the outside of the cupola, and
supplied with air from the blowing machine or general air trunk, as hereinbefore
explained, through the pipes D. E are openings forined in each of the blowing
chambers opposite to each of the tuyers A. To each of these openings is fitted a
sliding register or valve F, with a hole covered with a piece of glass G, through
which the state of the furnace can be inspected when the registers F are closed.
H are somewhat similar sliding registers or valves, fitted over the ends of the
tuyers A which open into the blowing chambers, and by means of which the

page_text: amount of air admitted to each tuyer may be regulated, each of the sliding registers
or valves H being operated through the openings E in the back of the blowing
chamber when the sliding register or valve F is drawn aside. By closing or
opening more or less the sliding registers H, the action of the furnace can be
regulated as desired, so as to facilitate the melting or smelting of the metal, and to
valy the capacity of the furnace, according to whether a small or large quantity
of metal is required to be run.
The apparatus can readily be adapted to any ordinary cupola, blast, or other
similar melting or smelting furnace, and by its use a considerable economy is
effected in the consumption of fuel as compared with ordinary cupolas or furnaces,
a greater quantity of metal is melted or smelted in the same time, greater facility
and convenience in working the furnace is attained, the castings are less car-
buretted, and the combustible gases, which in the ordinary cupola or blast furnace
escape through the chimney, are consumed and utilized by means of the air
admitted through the upper registers or valves. When commencing to blow, it is
found most advantageous to fully open the two lower tiers of registers or valves,
and to half open the upper tier, until the first charge is melted, when the latter
may be completely opened, and when finishing the blow they should be quite
closed.
Having now described the nature of the said Invention and the manner in which
the same is to or may be carried into effect, wo would have it understood that we
do not confine ourselves to the precise forms and arrangements described and
illustrated, as they may be varied without departing from the nature of the said
Invention, but what we do claim-is:
In cupolas, blast furnaces, and other similar melting or smelting furnaces; the..
arrangement of the tuyers in groups placed at intervals round the circumference of
the said cupola or other furnace, each group of tuyers opening into a separato
blowing chamber, the tuyers and chambers being provided with sliding registers
or valves, the whole combined, arranged, and operating substantially as herein-
before described, and illustrated in the drawings, and for the purposes specified.--
In witness whereof, I, the said Cowen Landreth for myself and on behalf of
the said Isidoro Renis, have bereunto set my hand and seal this twenty-
fourth day of April in the year of our Lord One thousand, eight hundred
and eighty-three.