IMPROVEMENTS IN THE CONSTRUCTION OF TUYERES OR NOZZLES FOR BLAST FURNACES, AND IN THE MODE OF FIXING THE SAME.
Year: 1873

page_text: LETTERS PATENT to Edward Primerose Howard Vaughan, F.C.S., of
54, Chancery Lane, in the County of Middlesex, Patent Agent, for
the Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF TUYERES OR
NOZZLES FOR BLAST FURNACES, AND IN THE MODE OF FIXING THE SAME. -A
communication from abroad by F. W. Lurmann, residing at
Osnabruck, Prussia, in the Empire of Germany, and C. Aldendorff,
"
COMPLETE SPECIFICATION filed by the said Edward Primerose Howard
Vaughan at the Office of the Commissioners of Patents, with his
Petition and Declaration, on the 19th July 1873, pursuant to the
9th Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
PRIMEROSE HOWARD VAUGHAN, F.C.S., of 54, Chancery Lane, in the
County of Middlesex, Patent Agent, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS IN
THE CONSTRUCTION OF TUYERES OR NOZZLES FOR BLAST FURNACES, AND IN THE MODE

page_text: OF FIXING THE SAME," and have petitioned Her Majesty to grant unto me,
my executors, administrators, and assigns, Her Royal Letters Patent for
the same, and have made solemn Declaration that it has been com-
municated to me from abroad by F. W. Lurmann, residing at Osnabruck,
Prussia, in the Empire of Germany, and C. Aldendorff, residing at
Duisburg, Prussia, in the said Empire.
NOW KNOW YE, that I, the said Edward Primerose Howard
Vaughan, do hereby declare that the following Complete Specification,
under my hand and seal, fully describes and ascertains the nature of the
said Invention, and in what manner the same is to be performed, in and
by the following statement, reference being had to the annexed Drawings,
and the figures and letters marked thereon, that is to say :—
This Invention consists in certain improvements in the construction
of tuyeres or nozzles for blast furnaces, and in the mode of fixing the
same, whereby greater advantages are obtained than by the methods of
construction and fixing hitherto adopted.
The tuyeres are, by preference, formed of the metallic alloy or
substance known as "phosphor bronze," and in order to allow of their
being cleansed and freed from scale and any substances which may be
deposited from the water which is admitted, they are made open at the
larger end, such opening being closed by means of a cover properly
fitted to the end of the tuyere in a water-tight manner, and fixed so as
to be readily removed for the purpose of cleansing the interior of the
tuyere, and of allowing the latter to be turned round, as herein-after
mentioned.
Tuyeres which are fixed in the ordinary manner are much injured and
unequally worn on the upper part of the exterior thereof by the dropping
of molten iron thereon, whilst the lower part of the interior is also
injured by the iron or steel bars which are employed for clearing the
same. To obviate these evils tuyeres fixed in accordance with this
Invention are so arranged as to be capable of being turned or rotated to
the extent of 90°, 180º, or 275°, thus giving an equal amount of wear,
both to the exterior and interior thereof, and enabling the same to be
used for a much longer period than has hitherto been possible.
By preference each tuyere is fixed in a cast-iron frame in which
water is allowed to circulate, the tuyere being kept in its proper position

page_text: by a hook provided for that purpose. By means of this arrangement
the tuyeres can be removed with great facility, and can be placed in
exactly the position it is desired they shall occupy; and can enter the
furnace nearly to their entire length, whilst shorter tuyeres can be
employed than are generally used, and those parts of the furnace in
proximity to the tuyeres are preserved from such injury as is frequently
'caused by the slag and molten metal breaking through.
I will now proceed to refer to the annexed Drawings, from which the
nature of this Invention will be more clearly understood. The same
letters of reference indicate similar parts in the several Figures.
Figure 1 is an external view of a tuyere with the before-mentioned
frame; Figure 2 is a longitudinal section, and Figure 3 an end view of
the same; Figures 4, 4), are sections of the tuyere taken respectively
through the lines A, B, and A, C, in Figure 6, Figure 5 being a
transverse view of the end of the tuyere; Figure 6 is a front view of the
cover; Figure 7 is a front elevation of the frame; and Figure 8 a vertical
section of the same, shewing the pipes for the circulation of water, as
herein-before mentioned.
A is the tuyere; B, the cover; and C, the frame in which the tuyere
is fixed. The holes a, a, a, a, in the cover B correspond with the
openings b, b, b, b, through which the screws. c pass, thus allowing of the
tuyere being turned to the extent of 90°, 180°, or 275°, without changing
the position of the cover. The cover and that part of the tuyere upon
which it rests should be accurately fitted and made perfectly water-tight
by means of suitable packing, as well understood. The pipes d in the
interior of the cast-iron frame are formed of wrought iron, water being
introduced thereto by the inlet pipe e, and allowed to pass out through
the outlet pipef. The hook by which the tuyere is retained in its place
is shewn at D. The water is introduced into the tuyere through the
pipe g, which should extend nearly to the extremity of the interior of the
tuyere. The outlet pipe, which is shewn at h, should only enter the
tuyere for a very short distance.
Having thus declared and ascertained the nature of the said Invention,
and in what manner the same is to be performed, I would observe in
conclusion that what I consider novel and original, and therefore claim
as constituting the said Invention are,-

page_text: First. The construction of tuyeres or nozzles for blast furnaces, sub-
stantially as herein-before described and set forth.
And, Secondly. The method of fixing tuyeres or nozzles in blast
furnaces in frames, cooled by circulating water, substantially as herein-
before described and set forth.
In witness whereof, I, the said Edward Primerose Howard Vaughan,
have hereunto set my hand and seal, this Nineteenth day of
July, in the year of our Lord One thousand eight hundred and
seventy-three.