IMPROVEMENTS IN WATER TUYERES FOR BLAST FURNACES, SMITHS' FIRES, AND FOR OTHER LIKE PURPOSES
Year: 1867

page_text: LETTERS PATENT to Rowland William Brownbill, of Walsall, in the
County of Stafford, Manufacturer, for the Invention of "IMPROVEMENTS
IN WATER TUYERES FOR BLAST FURNACES, SMITHS' FIRES, AND FOR OTHER
LIKE PURPOSES."
Sealed the 2nd June 1868, and dated the 12th December 1867.
PROVISIONAL SPECIFICATION left by the said Rowland William
Brownhill at the Office of the Commissioners of Patents, with his
Petition, on the 12th December 1867.
I, ROWLAND WILLIAM BROWNHILL, of Walsall, in the County of Stafford,
Manufacturer, do hereby declare the nature of the said Invention for "IM-
PROVEMENTS IN WATER TUYERES FOR BLAST FURNACES, SMITHS' FIRES, AND FOR
OTHER LIKE PURPOSES," to be as follows:-.
My Invention consists of the improvements herein-after explained in water
tuyeres for blast. furnaces, smiths' fires, and for other like purposes, whereby
the defects of water tuyeres as ordinarily constructed are wholly or in part
obviated.
In constructing.tuyeres according to my Invention. I make the outside case
and inside case of the: tuyere of thin wrought iron, and I connect the rear
ends of the said cases by means of a ring inserted between them and welded

page_text: The
in the ordinary way. I do not however insert a ring between the fore or nose.
ends of the said cases, as in the construction of the ordinary tuyere, but I
connect the said cases together at the nose ends in the following manner:--
Upon the outside of the fore end of the inner case a neck and shoulder are
turned and the fore end of the outer case is curved or cupped inwards, its
contracted end being turned and made to fit upon the turned end or neck of
the inner case, the inner face of the said curved or cupped end abutting
tightly against the shoulder of the said turned end of the inner case.
opening at the nose. end of the outer case is left after turning of such a size
that it requires to be heated and expanded to permit of the introduction of
the fore end of the inner case. In putting together the parts of the tuyere
the nose end of the outer case is heated and placed upon the nose end of the
inner case, the said heated end is allowed to cool and shrink or contract upon
the nose end of the said inner case. The inner and outer cases at the nose ends
are thus effectually secured together; the ring is then inserted and welded
between the rear ends of the cases. The junction of the cases at the fore
or nose ends is afterwards perfected by rivetting or by caulking. The
water is introduced through openings in the ring at the rear end in the
usual way.
By constructing tuyeres according to my Invention the thick ring usually
welded between the cases at the nose end is dispensed with and the said nose
end made much thinner than when the said ring is used. The said.. nose end
is thereby effectually kept cool by the water and does not burn away. In
consequence of its low temperature melted metal will not adhere to it and the
injury which arises to ordinary tuyeres by the adhesion thereto and subsequent
removal therefrom of the metal is avoided.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Rowland William Brownhill in the Great Seal Patent
Office on the 9th June 1868.
TO ALL TO WHOM THESE PRESENTS. SHALL COME, I, ROWLAND
WILLIAM BROWNHILL, of Walsall, in the. County of Stafford, Manufacturer,
send.greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of December, 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

page_text: me, the said Rowland William Brownhill, Her special licences that: I, the.
said. Rowland: William Brownhill, my executors, administrators, and assigns,
or such others as I, the said Rowland William Brownhill, 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 WATER: TUYERES: FOR
BLAST FURNACES, SMITHS. FIRES, AND FOR. OTHER LIKE PURPOSES," upon the.
condition (amongst others) that I, the said Rowland William Brownhill,
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 Rowland William Brownhill, 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 explained in water
tuyeres for blast furnaces, smiths' fires, and for other like purposes, whereby
the defects of water tuyeres as ordinarily constructed are wholly or in part
obviated.
In constructing tuyeres according to my Invention I make the outside case
and inside case of the tuyere of thin wrought iron, and I connect the rear
ends of the said cases by means of a ring inserted between them, and welded
in the ordinary way. I do not, however, insert a ring between the fore or
nose ends of the said cases, as in the construction of the ordinary tuyere, but I
connect the said cases together at the nose ends in the following manner:-
Upon the outside of the fore end of the inner case a neck and shoulder are
turned, and the fore end of the outer case is curved or cupped inwards, its
contracted end being turned and made to fit upon the turned end or neck of
the inner case, the inner face of the said curved or cupped and abutting
tightly against the shoulder of the said turned end of the inner case. The
opening at the nose end of the outer case is left after turning of such a size
that it requires to be heated and expanded to permit of the introduction of the
fore end of the inner case. In putting together the parts of the tuyere the
nose end of the outer case is heated and placed upon the nose end of the inner
.

page_text: case; the said heated end is allowed to cool and shrink or contract upon the
nose end of the said inner case. The inner and outer cases at the nose ends
are thus effectually secured together. The ring is then inserted and welded
between the rear ends of the cases; the junction of the cases at the fore
or nose ends is afterwards perfected by rivetting or by caulking. The
water is introduced through openings in the ring at the rear end in the usuał
way.
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.
Figure represents a longitudinal section of -a water tuyere constructed
according to my Invention; and Figure 2 is a section of the nose end of the
inner cone or case of the tuyere.
The said tuyere consists of two concentric cones or cases a, b, of thin
wrought iron, and a ring c welded between the said cones at the rear end.
The fore or nose ends a³, 63, of the cones or cases of the tuyere are not pro-
vided with the ordinary ring as represented, the said parts a³, 6º, being
constructed and secured together in the following manner :-Upon the out-
side of the fore end a* of the inner cone or case a a neck and shoulder d, e,
are turned as best seen in the separate view of the said fore end, Figure 2.
The fore end 6 of the outer cone or case b is curved or cupped inwards, and
turned or bored out to the required size to fit accurately upon the neck & of the
inner cone or case, and to make the inner face of the said cupped end abut
tightly against the shoulder ate of the said inner case or cone as represented.
The opening in the fore or nose end 6 of the outer cone or case & is left after
turning or boring of such a size that it requires to be heated and expanded
before the fore or nose end a of the inner cone or case a can be introduced
into the opening in the said end 6*.
The parts of the tuyere having the shape and construction represented are
put together in the following manner:-The nose end 6 of the outer case or
cone 6 is heated and placed on the neck d and against the shoulder 6 of the
nose end a³ of the inner case or cone a; the said heated end &* is allowed to
cool and shrink or contract upon the nose end a³ of the inner case or cone, as
represented in the Drawing, and thereby secure together the cones or
cases a, b, at the nose ends. The ring c is next welded between the rear ends
of the cones a, b, and the tuyere is then complete. The junction of the
parts a³, 63, may be perfected if necessary by rivetting, or by welding, or by
caulking. The nose end at may have a screw thread cut upon it, and the
nose end 6 may have a corresponding screw thread cut upon it; and after

page_text: the heating of the nose end 6 the nose end a³ may be inserted in it by a
screwing motion; but I prefer to shrink the nose end. 6* upon the nose end a*
in the manner last described, that is without a screwing motion. The water
is introduced into the space between the two cones or cases through openings
in the end ring c, as usual.
By constructing tuyeres according to my Invention the thick ring usually
welded between the cases at the nose end is dispensed with, and the said nose
end made much thinner than when the said ring is used; the said nose end
is thereby effectually kept cool by the water, and does not burn away. In.
consequence of its low temperature melted metal will not adhere to it, and
the injury which arises to ordinary tuyeres by the adhesion thereto and sub-
sequent removal therefrom of the metal is avoided.
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 water tuyeres for blast furnaces,
smiths' fires, and for other like purposes herein-before described and illus-
trated in the accompanying Drawing, that is to say, connecting the nose or
fore ends of the cases or cones of the said tuyeres by cupping or curving in-
wards the fore or nose end of the outer case or cone, and shrinking or con-
tracting the said cupped or curved end upon the fore or nose end of the
inner case or cone substantially as described and illustrated, whereby the thick
ring ordinarily employed at the nose end of the tuyere is dispensed with, and
the said nose end thereby made much thinner and more effectually kept cool
than usual.
In witness whereof, I, the said Rowland William Brownhill, have
hereunto set my hand and seal, this Fourth day of June in the year
of our Lord One thousand eight hundred and sixty-eight.
D
Witness,
ROWLAND WILLIAM BROWNHILL. (L.S.)
R. W. GILLESPIE,
Sol.,
Walsall.