IMPROVEMENTS IN APPARATUS EMPLOYED IN FURNACES
Year: 1879

page_text: BLAST
LETTERS PATENT to Thomas Hollis, of Ilkeston, in the County of Derby, for
the Invention of "IMPROVEMENTS IN APPARATUS EMPLOYED IN
FURNACES."
Sealed the 10th April 1879, and dated the 3rd February 1879.
PROVISIONAL SPECIFICATION left by the said Thomas Hollis at the Office
of the Commissioners of Patents on the 3rd February 1879.
THOMAS HOLLIS, of Ilkeston, in the County of Derby. "IMPROVEMENTS IN
APPARATUS EMPLOYED IN BLAST FURNACES."
In carrying out my improvements I employ a tymp to each open forepart
furnace; such tymp, with the filling plates and wedges which secure it in position,
is of the width of the open forepart. The central part of the outer side of the tymp
projects, and forms a trough over which the cinder passes as it escapes through an
orifice in the centre of the tymp. Such tymp and trough I construct as follows:--
I connect three or more elongated inlet coils of pipe of a suitable size, the coil
nearest the outside of the furnace projects into the body of the trough, and is
returned into the tymp, where it is turned upwards and is connected to three or
more return coils of pipe lying over the inlet coils. Round the whole of these pipes
the metal forming the tymp and trough is east, the orifice in the centre of the tymp
lying between the inlet and outlet coils. By such means I am enabled to save
considerable time and expense in working the furnace and renewing the fettling, as
the tymp and trough is protected from the effects of the heat of the furnace by
water circulating through the coils of pipes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Hollis in the Great-Seal Patent Office on the 22nd July
1879.
THOMAS-HOLLIS, of Ilkeston, in the County of Derby. "IMPROVEMENTS IN
APPARATUS EMPLOYED-IN-BLAST-FURNACES."_
In carrying out my improvements I employ-a-tymp-to-each. -open_forepart
furnace; such tymp, with the filling plates and wedges which-secure-it-in-position,-
is of the width of the open forepart. The central part of the outer side of the tymp
projects and forms a trough over which the cinder passes as it escapes through an
orifice in the centre of the tymp. Such tymp and trough I construct as follows:-
I connect three or more elongated inlet coils of pipe of a suitable size, the coil
nearest the outside of the furnace projects into the body of the trough, and is
returned into the tymp, where it is turned upwards, and is connected to three or
more return coils of pipe lying over the inlet coils. Round the whole of these pipes'
the metal forming the tymp and trough is cast, the orifice in the centre of the tymp
lying between the inlet and outlet coils. By such means I am enabled to save
considerable time and expense in working the furnace and renewing the fettling, as
the tymp and trough is protected from the effects of the heat of the furnace by
water circulating through the coils of pipes.
Figure 1 represents a half sectional plan of a blast furnace having five tuyers,
with my improved cinder tymp applied thereto.
Figure 2, an enlarged sectional plan of the open forepart portion of the same
furnace and cinder tymp.
Figure 3 a front view of the same; and
Figure 4 a side view of the cinder tymp further enlarged.
The corresponding parts in each Figure are indicated by the same letters where
necessary.
In carrying out my improvements I employ a cinder tymp A of the shape shewn
at Figures 1 to 4 to each open forepart furnace, such tymp, together with the
filling plates and wedges C, which secure it in position, at each end is of the width
of the open forepart, the central part of the outer side of the tymp projects, and
forms a trough B, over which the cinder passes as it escapes through the tapered
orifice D in the centre of the tymp; the smaller end of the orifice is towards the
inside of the furnace, and the larger end is towards the open forepart of the furnace.
The orifice is shewn by dotted lines at Figures 2 and 4. The radiating dotted
-lines-at-Figures 1 and 3 shew the position of the centre of two out of the five
tuyers.
1
Such tymp and trough I construct as follows:-I connect three or more elongated
inlet coils of pipe E of suitable size, the coil nearest the outside of the furnace
projects into the body of the trough, and is returned into the tymp, and back again
into the trough, as shewn by the dotted lines F at Figure 2; it is again returned
into the tymp, and out to the right at F1, where it is connected to three or more
return outlet coils of pipe G lying over the inlet coils. Round the whole of these
pipes the metal forming the tymp and trough is cast, the orifice D in the centre of
the tymp, lying between the inlet and outlet coils. The inlet pipe is connected to
a constant supply of cold water, which circulating through the coils of pipes, the
tymp and trough are protected from the effects of the heat of the furnace. The
heated water escapes through the pipe G connected to a waste pipe. By such means
I am enabled to save considerable time and expense in working the furnace and
renewing the fettling. A cinder tymp constructed as above described I place in
the open forepart of a blast furnace, with the centre of the orifice through which

page_text: the cinder is discharged about six inches lower than the centre of the blast
tuyers.
Having now described the nature of my said Invention, and in what manner the
same may be performed,―
I declare that I claim for the combined tympan cinder trough, substantially as
hereinbefore described, and illustrated in the Drawings annexed.
In witness whereof, I, the said Thomas Hollis, have hereunto set my hand
and seal, this Twenty-first day of July, in the year of our Lord One
thousand eight hundred and seventy nine.
Witness,
H. W. GOUGH, C.E.,
Nottingham.
THOMAS HOLLIS. (L.S.)