IMPROVEMENTS IN OR CON- NECTED WITH THE TUYERES OF BLAST FURNACES
Year: 1882

page_text: LETTERS PATENT to Edward Griffith Brewer, of 33, Chancery Lane, in the
16
County of Middlesex, for an Invention of IMPROVEMENTS IN OR CON-
NECTED WITH THE TUYERES OF BLAST FURNACES." A communication from
abroad by Thomas Martin, of Bethanga, in the Colony of Victoria, Engineer,
"
PROVISIONAL SPECIFICATION left by the said Edward Griffith Brewer at
the Office of the Commissioners of Patents on the 2nd January 1882.
EDWARD GRIFFITH BREWER of 33 Chancery Lane in the County of Middlesex.
IMPROVEMENTS IN OR CONNECTED WITH THE TUYERES OF BLAST FURNACES."
(A communication from abroad by Thomas Martin, of Bethanga, in the Colony
of Victoria, Engineer.)
The object of this Invention is to remove obstructions from the nose of the
tuyere or air passages in blast furnaces. It is well known that one of the
difficulties metallurgists and others have to contend with in the use of blast
furnaces is the tendency of the metal or ores under treatment to clog around
and ultimately close the openings in the nose of the tuyere or air passages. This
is especially felt in the treatment of copper ores and pyrites in furnaces where the
air is passed through the molten metal, and it is specially although not wholly for
the purpose of removing or remedying this difficulty that this Invention is designed.
The Invention consists in providing a rod or poker for each air passage in the
tuyere, long enough to pass quite through such passage, and push away any
obstructions that may have gathered in, or in front of, its nose. These rods or
pokers are preferably attached to one common head working in an iron case, such
head having a rod-like a piston rod-attached to its other side which passes
through a stuffing box to prevent the escape of the air blast. This rod may be
worked by any convenient contrivances, say like the pump rod of a pump is worked.
The action should of course be very quick, that is to say, the set of pokers should
be forced through the air passages and back again as quickly as possible.
The application of this Invention is not confined to any particular kind or
construction of blast furnace nor to any particular incans of giving motion to the
contrivance, nor to its application to any particular process.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Edward Griffith Brewer in the Great Seal Patent Office on the
1st July 1882.
EDWARD GRIFFITII BREWER of 33 Chancery Lane in the County of Middlesex.
"IMPROVEMENTS IN OR CONNECTED WITH THE TUYERES OF BLAST FURNACES."
(A communication from abroad by Thomas Martin of Bethanga in the Colony of
Victoria, Engineer.)
The primary object of this Invention is to remove obstructions from the nose of
the tuyere or air passages in blast furnaces. It is well known that one of the
difficulties metallurgists and others have to contend with in the use of blast
furnaces is the tendency of the metal or ores under treatment to clog around and
intimately close the openings in the nose of the tuyere or air passages. This is
especially felt in the treatment of copper ores and pyrites in furnaces where the air
is passed through the molten metal, and it is specially although not wholly for the
purpose of removing or remedying this difficulty that this Invention is designed.
The Invention consists in providing a rod or poker for each air passage in the
tuyere long enough to pass quite through such passage and push away any
obstructions that may have gathered in, or in front of its nose. These rods or
pokers are preferably attached to one common head working in an iron case, such
head having a rod like a piston rod attached to its other side which passes through
a stuffing box to prevent the escape of the air blast. This rod may be worked by
any convenient contrivances say like the pump rod of a pump is worked. The
action should of course be very quick that is to say the set of pokers should be
forced through the air passages and back again as quickly as possible.
In the accompanying Drawings Figure 1 shows in plan partly in section a blast
furnace with the improvement attached. Figure 2 sectional elevation of the lower
part of such a furnace. Figures 3, 4 and 5 longitudinal and cross sections of
pokers with their case and immediate attachments. A is the air box, and A' A'
are the air passages. B B are the rods or pokers projecting from a head B' to
which is attached rod B2, connected by another rod B³ to lever B' by which it is
worked, C is an airtight casing for the pokers and C¹ stuffing box through which
passes rod B2 for which D is a guide standard-E is a standard for carrying
lever B*. To work this Invention it is only necessary to give the lever B' a rapid
to and fro motion-once will generally be sufficient, but the action may be repeated
if needed.
Having thus described the nature of this Invention and the manner of performing
same I would have it understood that the application of this Invention is not
confined to any particular kind of construction of blast furnace nor to any
particular means of giving motion to the contrivance nor to its application for any
particular process but I claim
First The construction of blast furnaces with a poker or rod for cach air
channel through which the blast passes such poker or rod being sufficiently long
to pass quite through and push away any obstructions that may have gathered
in or in front of such passages.
Second-The special method of arranging and working such rods or pokers as
illustrated in my Drawings.
In witness whereof I the said Edward Griffith Brewer have hereunto set
my hand and seal this Thirtieth day of June in the year of our Lord
One thousand eight hundred and eighty two.