Year: 1887

page_text: Date of Application, 25th Aug., 1887
Complete Left, 21st Feb., 1888
Complete Accepted, 15th June, 1888
1 JAMES MCCANN of 21 Millom Road Millom in the County of Cumberland
Furnace Minder do hereby declare the nature of this invention to be as follows:—
The object of my Invention is to increase the preservative powers of Blocks and
Twyeres over that part of Furnaces where the Blast enters preventing the Bolly
pipes getting destroyed by heat and thus interfering with the regular working of
Furnaces.
I effect this object by constructing the Blocks and Twyeres in such a way that each
set of Blocks and Twyeres will do four times the work which can be done by the
system now used.
In order to prevent the parts of the Furnace where the blast enters from becoming
destroyed by the increased heat at those parts water is kept circulating round the
Belly pipes, in Tubes known as Blocks and Twyeres.
A Twyere consists of a Tube coiled round the Belly pipe with the object of
allowing a constant stream of cold water to pass round it.
A Block consists of a Tube coiled round the Twyeres for to serve the same
purpose.
The advantage of iny appliance is that when that portion of the tube nearest to the
Furnace becomes destroyed, the whole appliance does not become useless, but by
means of four seperate parts in the Twyeres and four seperate parts in the Blocks
all disconected with each other but all connected with the same Feeder. A stream
of water may be kept flowing round the Belly pipes, although part of the appliance
may have been destroyed.
1 effect this object by constructing the Twyere in four seperate parts. The water
is conveyed from the Feeder by means of a Tube which is coiled round the Belly
pipe 2 times and discharged through a similar tube passing parallel to the Belly
pipe on the opposite side.
Each part of the Twyere is constructed in a similar way with this difference that
the Charger of the first part (that nearest the Furnace) is over the the other three,

page_text: and the discharger underneath the rest being arranged in like manner, so that in the
fourth part the charger is underneath and the discharger over the other three.
The Blocks also consist of Tubes coiled round the Twyeres and Belly pipes with
chargers and dischargers arranged parallell over the Belly pipes. Like the Twyeres
the Blocks also consist of four parts. The water is conveyed from the Feeder through
a Tube, which is coiled round the Twyeres twice and discharged through a pipe which
passes by the side of the pipe conveying the cold water. The other parts of the
Block are arranged in like manner with this difference the distance between the point
where the coil commences and the point where it is discontinued is greater in the the
second part, and continues to increase according to the size of the pipes used. In
the fourth part there being the distance of three charging and three discharging pipes.
In the fourth part an extra coil is added to counterbalance this distance.
The Block and Twyere Tubes are made of wrought Iron.
By the use of my appliance the blast is allowed to continue in operation although
the first coil of either Block or Twyere or both may become destroyed and rendered
useless through the provention of the circulation of the water. When the first part, is
destroyed there are still three other parts, of both Block & Twyeres remaining
good and the second part continues to do the work of the first until it also becomes
burned and so on until the whole appliance through the continual heat is burned,
when a fresh set has to be inserted with this difference that the Blocks are
calculated to last longer than the Twyeres and do not therefore require to be
renewed so often.
The object of my appliance is to save the time and labour which is now required
when any part of a twyere or block gets destroyed. It being necessary to have
the burned Block or twyere replaced by, new ones and while they are being inserted
the Blast has to be taken off.
By the adoption of my Invention a Furnace will only require to be supplied
with Blocks and Twyeres once where they have to be supplied four times by the
system now in use. Through allowing the blast to continue for a longer period a
better quality of Iron will be produced, and the danger of injuring the Blast Engine
through putting on and taking off the blast so often considerable reduced. The
danger to men who attend to this kind of work will also to some extent be avoided.
The advantage of my appliance having been described what I claim is the arrange-
ment by which the Blocks and Twyeres continue to keep the Belly pipes and adjoing
part of the furnaces cool through keeping up the circulation of cold water when one
or more tubes gets burned out through heat."
Datad this 94th day of Arauat 1997

page_text: Improvements in Blocks and Twyeres Connected with
Blast Furnaces.
I JAMES MCCANN of 21 Millom Road Millom in the County of Cumberland,
Furnace Minder do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
The object of my invention is to increase the preservative powers of blocks and
twyeres over that part of the furnace where the blast enters by preventing the belly
pipes getting destroyed by heat and thus interfering with the regularity of the working
of the furnace.
I effect this object by constructing blocks and twyeres in such a way that they
may be considered to do three times the work of the kind now used.
In order to prevent the parts of a furnace where the blast enters from becoming
destroyed by the increased heat at those parts water is kept circulating round the
belly pipes in tubes known as blocks and twyeres.
A twyere consists of tubes coiled round the belly pipe to allow a constant stream of
cold water to pass round it. A block consists of tubes coiled round the twyere
to serve the same purpose.
The advantage of my appliance is that when a portion of the tube of either block
or twyere nearest to the furnace becomes destroyed by heat the whole appliance is
not rendered useless but by means of three seperate arrangements of tubes in the
twyeres and a similar arrangement in the blocks all disconnected with each other but
all connected with the same feeder A. a stream of cold water may be kept flowing round
the belly pipes although one or more sets of tubes belonging to the blocks and
twyeres may have been destroyed by heat.
I effect this object by constructing the twyere in three seperate parts.
The first part 1 of the twyere consists of a tube 1 passing parallel to the belly pipe
converting the cold water from the feeder A and is coiled round the belly pipe once
the water being discharged by another tube 1' also passing parallel to the belly pipe.
The second part 2 & 2 is constructed in a similar manner. In the third part 3 & 31
the tube is coiled round the belly pipe six times (sometimes more and sometimes less
as may be required). The charging 1. 2. 3 and discharging 11 21 31 tubes are
generally placed over the belly pipe but may also be arranged at either side of it.
The block is also constructed of three parts 4. 5. 6 & 4 5¹ & 6' arranged similar to
the parts of the twyeres but the third part 6. is not coiled so many times as the third
part of the twyere.
The Blocks and twyeres may also be constructed in two parts.
By the use of my appliance the blast is allowed to continue in operation although
one or more parts of either block or twyere or both, may be destroyed by the heat.

page_text: When the three parts of either blocks or twyères become destroyed a new set is
.required there being this difference the blocks being further removed from the heat
are calculated to last longer than the twyeres and will not therefore require renewing
so often.
The tubes for the blocks and twyeres are made of wrought iron..
The object of my appliance is to save some of the time and labour which is now
required in replacing blocks and twyeres by new ones as soon as any part of them
get injured by the heat and also to allow the blast to continue for a
at work..
longer time
By the adoption of my invention one set of blocks and twyeres may he considered
to last as long and do better work than three of the ones now in use.
Through allowing the blast to continue in operation for a longer period a better
quality of iron will be produced and the danger of injuring the blast Engine
through putting on and taking off the blast so often considerably reduced. The
danger to men who attend to this kind of work will also be to some extent
mitigated.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is
The arrangement of the tubes in the blocks and Twyeres whereby the belly pipe
and adjoining parts of the furnace is kept cool through keeping up a circulation of
cold water although one or more tubes of the blocks or twyeres get burned out
by heat.