FOR THE PREVENTION OF ACCIDENTS IN THE USE OF WATER TUYERES & OTHER APPLIANCES WHERE WATER IS USED IN AND ABOUT BLAST AND OTHER FURNACES
Year: 1874

page_text: PROVISIONAL SPECIFICATION left by Edward Jones and George
Frederick Thomson at the Office of the Commissioners of Patents,
with their Petition, on the 9th November 1874.
We, EDWARD JONES, Blast Furnace Manager, and GEORGE FREDERICK
THOMSON, both of Ruabon Iron Works, Ruabon, in the County Denbigh,
North Wales, do hereby declare the nature of our said Invention "FOR
THE PREVENTION OF ACCIDENTS IN THE USE OF WATER TUYERES & OTHER
APPLIANCES WHERE WATER IS USED IN AND ABOUT BLAST AND OTHER FURNACES,"
to be as follows (that is to say):—
In using tuyeres in and about blast and other furnaces it is common
to protect the nozzle part of such tuyeres with a coil of piping or other
equivalent means, through which a continuous supply of water is kept
flowing to protect the tuyeres from being burnt, but in consequence of
the great heat to which the tuyeres and protecting coils are subjected it
is not unfrequent for the coils or other appliances to leak, and such
leakage water if not at once detected will get into the furnace, doing
greater or less damage according to the quantity so escaping. It is also
not uncommon for the water to stop flowing through the protecting coil
or coils or other flowway, which of course subjects the tuyeres to speedy

page_text: destruction. With water boshes, tymps, and all sorts of tuyeres pro-
tected by the use of water there is likewise the same danger and result
of the water ceasing to flow without indicating the defect, and which
defect we purpose obviating by causing a self-acting alarm to be given
that will not only inform the manager or superintendent of the danger,
but define the locality or particular tuyere, bosh, tymp, or other water
supply that is out of order.
To remedy this dangerous (and frequently) expensive defect we adopt
the following means (as an example) :-A beam is placed centrally (by
preference) over a tuyere equipoised with a weight on one end and a
small pendant bosh on the other, into which bosh the water empties
itself after flowing through the protecting coil of the tuyere or other
means that may be used, and at the bottom of this pendant auxiliary
bosh an escape pipe is fixed fitted with a regulating tap, so that the
quantity of water within the bosh forms a counterpoise to the weight at
the other end of the beam before refered to, and with these regulated
appliances, if from leakage or stoppage the inlet or outer water ceases to
maintain the equilibrium, the pendant auxiliary bosh will rise from the
preponderating effect of the weight, causing an air-way to open in
connection with the blast to which a whistle or other equivalent means or
sounding apparatus that may be obtained from a rush of air may be
fixed, so as to give speedy notice or warning of the defect and con-
sequent danger.
The details for effecting this self-acting alarm signal to blast and other
furnaces may be varied according to position and circumstances, as for
instance, other means may be arranged both as to the position of the
beam or its equivalent or the mode of maintaining the equilibrium, and
the alarm may in some instances be given with as good effect by steam
as by air, thus making the apparatus applicable and useful for the
purposes indicated, wherever the circulation of water is used as a
cooling and protecting medium in and about blast, heating, puddling,
reverberatory, or other furnaces or heating apparatus where water is
used.