IMPROVEMENTS IN TUYÈRES
Year: 1856

page_text: LETTERS PATENT to John Knowles, of Calow, in the County of Derby,
Iron Master, and William Buxton, of Brimington, in the said County of
Derby, Manager of Iron Works, for the Invention of "IMPROVEMENTS IN
TUYÈRES."
Sealed the 5th December 1856, and dated the 29th July 1856.
PROVISIONAL SPECIFICATION left by the said John Knowles and William
Buxton, at the Office of the Commissioners of Patents, with their
Petition, on the 29th July 1856.
We, JOHN KNOWLES, of Calow, in the County of Derby, Iron Master, and
WILLIAM BUXTON, of Brimington, in the said County of Derby, Manager of
Iron Works, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN TUYÈRES," to be as follows; and consists in the construction of tuyères
in such manner that the water shall pass to the nozzle (or that part nearest
the fire) as nearly as possible in its natural state of temperature, so as to
exert the greatest amount of cooling property of which it is capable on the
blast pipe.
Many plans may be adopted for this purpose; but the method we prefer,
and have found most efficient in practice, is to construct the tuyère of wrought-
iron tubing of a spiral or worm form, so arranged that the water may pass
direct to the nozzle and return through the worm. By this means the
temperature of the water is scarcely changed when it reaches that part of the
tuyère in proximity to the fire.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Knowles and William Buxton, in the Great Seal
Patent Office on the 24th January 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
KNOWLES, of Calow, in the County of Derby, Iron Master, and WILLIAM
BUXTON, of Brimington, in the said County of Derby, Manager of Iron Works,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the 29th day of July, in the year of our Lord One
thousand eight hundred and fifty-six, in the twentieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto us, the-said-
John Knowles and William Buxton, Her special licence that we, the said
John Knowles and William Buxton, our executors, administrators, and
assigns, or such others as we, the said John Knowles and William Buxton,
our executors, administrators, and assigns, should at any time agree with, and
no others, from time to time and at 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 TUYÈRES,"
upon the condition (amongst others) that we, the said John Knowles and
William Buxton, our executors or administrators, by an instrument in writing
under our, 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 we, the said John Knowles and William Buxton,
do hereby declare the nature of our said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement:-
Our Invention consists in constructing tuyères in such a manner that the
water used for the purpose of keeping them cool shall exert the greatest
amount of cooling effect of which it is capable on the nozzle, or that part
nearest to the fire.
The annexed Drawing shews a plan of the form we prefer, which is a spiral
or worm of wrought iron, or any other metal tubing, arranged that the
water shall pass directly through the part A to the nozzle N and return
SO

page_text: through the worm to B. The blast pipe is inserted into the worm, which is
surrounded with fire clay to keep in the blast.
We are aware that coils of tubing, through which water is passed, cased in
cast iron, have been commonly used for tuyères, and the distinctive mark of
our Invention consists in the use of tubing alone in a spiral form, so as to
bring the water to act on the heated metal as directly as possible. The spiral
coils may either be in contact with each other or separated.
Having now described the nature of our said Invention, and the manner in
which the same is or can be applied, we wish to have it well understood that
we do not confine ourselves to the precise details herein set forth; but our
claim is for a tubular tuyère laid in a spiral form, the water used for keeping
it cool passing at once by a pipe direct to the nozzle of the tuyère and return-
ing by the coil, as herein described.
In witness whereof, we, the said John Knowles and William Buxton,
have hereunto set our hands and seals, this 23rd day of January, in
the year of our Lord One thousand eight hundred and fifty-seven.
JOHN IZNOWITS