IMPROVEMENTS IN TUYERES FOR DLAST FURNACKS
Year: 1867

page_text: LETTERS PATENT to Charles Blakemore Hodgetts, of Corngreaves, near
Cradley Heath, in the County of Stafford, Blast Furnace Manager, for
the Invention of IMPROVEMENTS IN TUYERES FOR DLAST FURNACKS.
PROVISIONAL SPECIFICATION left by the said Charles Blakemore
Hodgetts at the Office of the Commissioners of Patents, with his
Petition, on the 11th November 1867.
I, CHARLES BLAKEMORE HODGETTS, of Corngreaves, near Cradley Heath, in
the County of Stafford, Blast Furnace Manager, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN TUYERES FOR BLAST FURNACES,"
to be as follows:-
My Invention consists of the improvements herein-after described in the
construction and arrangement of the parts of tuyeres for blast furnaces, whereby
the tuyère is protected against the injurious action of the heat of the furnace
and kept so cool that in blast furnaces used for the smelting of iron the melted
metal does not attach itself to the tuyere.
Tuyeres made according to my Invention last longer than ordinary
tuveres.

page_text: In making a tuyere according to my Invention I make the body of the
tuyere in the usual manner, that is, of two hollow cones of different sizes, the
smaller one being fixed concentrically within the larger one by annular ends.
In the space between the two hollow cones a water pipe is fixed, the said pipe
proceeding from the wide to nearly the narrow end of the tuyere; the said
pipe terminates in a hollow ring surrounding the inner cone; the said hollow
ring is pierced with a series of holes or jets on the side turned towards the
small end of the tuyere. The water with which the hollow conical space is
filled is introduced by means of the pipe described, and passing out at the
holes or jets in the hollow ring is delivered directly against the end of the
tuyere which is exposed to the greatest heat; the water returns from the
narrow end of the tuyere to the wide end, from which it passes away. In
order to cause the water on its return passage to play against the outer hollow
cone a collar is made on the inner cone at the back of the hollow ring
described; the said collar directs the water on its return against the outer
cone and keeps it cool.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Blakemore Hodgetts in the Great Seal Patent
Office on the 28th April 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
BLAKEMORE HODGETTS, of Corngreaves, near Cradley Heath, in the County of
Stafford, Blast Furnace Manager, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of November, in the year of our
Lord One thousand eight hundred and sixty-seven, in the thirty-first year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Charles Blakemore Hodgetts, Her special licence that I, the said
Charles Blakemore Hodgetts, my executors, administrators, and assigns, or
such others as I, the said Charles Blakemore Hodgetts, my executors,
administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend, within
the United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN TUYERES FOR BLAST
FURNACES," upon the condition (amongst others) that I, the said Charles

page_text: Blakemore Hodgetts, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said Charles Blakemore Hodgetts, do
hereby declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say:-
My Invention consists of the improvements herein-after described in the
construction and arrangement of the parts of tuyeres for blast furnaces, whereby
the tuyere is protected against the injurious action of the heat of the furnace
and kept so cool that in blast furnaces used for the smelting of iron the melted
metal does not attach itself to the tuyere.
Tuyeres made according to my Invention last longer than ordinary
tuyeres.
In making a tuyere according to my Invention I make the body of the
tuyere in the usual manner, that is, of two hollow cones of different sizes, the
smaller one being fixed concentrically within the larger one by annular ends.
In the space between the two hollow cones a water pipe is fixed, the said pipe
proceeding from the wide to nearly the narrow end of the tuyere; the said
pipe terminates in a hollow ring surrounding the inner cone; the said hollow
ring is pierced with a series of holes or jets on the side turned towards the
small end of the tuyere. The water with which the hollow conical space is
filled is introduced by means of the pipe described, and passing out at the
holes or jets in the hollow ring is delivered directly against the end of the
tuyere which is exposed to the greatest heat; the water returns from the
narrow end of the tuyere to the wide end, from which it passes away. In
order to cause the water on its return passage to play against the outer hollow
cone a collar is made on the inner cone at the back of the hollow ring
described; the said collar directs the water on its return against the outer
cone and keeps it cool.
Having explained the nature of my Invention I will proceed to describe,
with reference to the accompanying Drawing, the manner in which the same
is to be performed.
Figures 1 and 2 represent in perspective, Figure 1 being partly in section,
a tuyere for a blast furnace constructed according to my Invention; Figure $

page_text: is a longitudinal section of the same; and Figure 4 is a transverse section of
the same taken through the line a of Figure 3. The same letters of reference
indicate the same parts in each Figure of the Drawing.
b, c, are the two hollow cones of the tuyere fixed together by the annular
ends d, e; f is the water pipe situated in the space between the said hollow
cones b, c, the said pipef proceeding from the wide end to nearly the narrow
end of the tuyere, as represented. The said water pipe f is connected with the
hollow ring 9 surrounding the inner cone c; this hollow ring is pierced with
a series of holes or jets h, h³, on the side turned towards the small end of the
tuyere. The water with which the hollow conical space of the tuyere is filled
is introduced by means of the pipe f, the said water passing out at the holes
or jets in the hollow ring g, and being delivered against the end of the
tuyere which is exposed to the greatest heat; the water returns from the
narrow end to the wide end of the tuyere, from which wide end it passes
away by the opening i in the said wide end, as indicated by the arrows in
Figure 3. The holes or jets marked h³ at the lower part of the hollow ring g
are not situated in a line with the upper holes or jets h, and the said lower
holes are so arranged as to project the water in an inclined direction instead
of horizontally; by this means the jets of water are projected against the part
markede of the narrow end 6 of the tuyere, on which the reduced metal has
a tendency to fall, and which part is more liable to be injured by heat than
the other parts. By concentrating the jets of water passing through the lower
holes upon the part e the said part is kept cool and the melted metal does
not attach itself to the said part. The other parts of the narrow end of the
tuyere are also kept cool by the jets of water passing through the holes h.
Behind the hollow perforated ring g is a collar k against which the water
plays on its return passage; the said water is thereby directed against the
outer cone 6 and the said cone thereby kept cool, as will be understood by an
examination of Figure 3.
Having now described the nature of my Invention, and the manner in
which. the same is to be performed, I wish it to be understood that I do not
limit myself to the precise details herein described and illustrated, as the same
may be varied without departing from the nature of my Invention; but I
claim as my Invention the improvements in tuyeres for blast furnaces herein-
before described and illustrated in the accompanying Drawing, that is to say,
the construction and adaptation to the said tuyeres of the water pipe f and
perforated hollow ring g for delivering jets of water directly against the narrow
end of the Luyere, and the collar k for directing the water on its return passage

page_text: against the outer cone of the tuyere, substantially as herein-before described
and illustrated.
In witness whereof, I, the said Charles Blakemore Hodgetts, have
hereunto set my hand and seal, this Twenty-third day of April, in the
year of our Lord One thousand eight hundred and sixty-eight.
Witness,
GEORGE SHAW.
CHARLES BLAKEMORE HODGETTS. (LS.)