AN IMPROVED METHOD. OF AND APPARATUS FOR EXTRACTING THE GASES OF SMELTING AND OTHER FURNACES
Year: 1873

page_text: LETTERS PATENT to Thomas Evan Williams, of Raglan, in the
County of Monmouth, for the Invention of "AN IMPROVED METHOD.
OF AND APPARATUS FOR EXTRACTING THE GASES OF SMELTING AND OTHER
FURNACES."
Sealed the 19th May 1874, and dated the 1st December 1873.
PROVISIONAL SPECIFICATION left by the said Thomas Evan Williams
at the Office of the Commissioners of Patents, with his Petition,
on the 1st December 1873.
I, THOMAS EVAN WILLIAMS, of Raglan, in the County of Monmouth,
do hereby declare the nature of the said Invention for "AN IMPROVED
METHOD OF AND APPARATUS FOR EXTRACTING THE GASES OF SMELTING AND OTHER
FURNACES," to be as follows:-
My Invention consists in effecting the withdrawal of the waste gases
of a furnace through the centre of a peculiarly constructed apparatus
placed at the top of the said furnace instead of taking them away
through the side walls of the same.

page_text: The said apparatus forms both a gas valve and an improved charger,
and is constructed as follows:-The said valve is made of cast-iron or
other suitable metal, and is hollow and conical; it projects down inside
the top of the furnace with its inclined or sloping surface upward, and it
This valve is
has a central passage or tube for the escape of the gas.
attached to the rod or stem of a piston which is fitted in a cylinder
placed at the top of a pipe or passage arranged centrally above the said
valve. By the pressure of steam, air, or water in the cylinder below the
piston the same will be raised and will raise the valve and close the
mouth of the furnace. The charge of minerals is placed upon the
conical valve in readiness for supplying the furnace. To open the mouth
of the furnace the steam or other fluid at the bottom of the cylinder is
allowed to pass through a small cock to the top of the same, permitting
the valve to open.
The descent of the valve and entrance of the
minerals into the furnace are regulated by the said cock.
The said apparatus is attached to or secured upon the charging plate.
When the said hollow valve is raised and closed the gases from the
furnace will pass through the central passage.
To the aforesaid central
pipe or passage I connect pipes which may be arranged to convey the
gases taken from the furnace to any desired position.
When two or more furnaces are connected with one main gas flue I
arrange inside the aforesaid pipe a valve which acts in combination with
the hollow conical valve, and is closed when the latter is down or open,
thereby preventing the return of gas from the said main flue into the
furnace.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of December, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
3 cessors, give and grant unto me, the said Thomas Evan Williams, Her
special licence that I, the said Thomas Evan Williams, my executors,
administrators, and assigns, or such others as I, the said Thomas Evan
Williams, 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 "AN IMPROVED METHOD OF AND APPARATUS FOR EXTRACTING
THE GASES OF SMELTING AND OTHER FURNACES," upon the condition (amongst
others) that I, the said Thomas Evan Williams, 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 Thomas Evan Williams, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the accom-
panying Drawing forming a part of this Specification:-
My Invention consists in effecting the withdrawal of the waste gases
of a furnace through the centre of a peculiarly constructed apparatus
placed at the top of the said furnace instead of taking them away
through the side walls of the same.
The said apparatus forms both an improved charger and double heat
conical gas valve.
The manner in which my said Invention is best carried into practise
may be fully understood by referring to the accompanying Drawing, in
which Figure 1 is a vertical section of the top of a furnace provided with
my apparatus; Figure 2 is a similar section showing a modification of
the said apparatus. Like letters indicate the same parts in both of the
Figures.
i

page_text: "
The valve a is made of cast-iron or other suitable material, and is
hollow and conical; it projects down inside the top or mouth 6 of the
furnace with its inclined or sloping surface a¹ upwards, and it has a
central passage or tube c for the escape of the gas; a² is the lower beat,
and as the upper beat of the said valve. This conical double beat valve 5
a in the apparatus shown in Figure 1 is attached to the rod or stem of a
piston which is fitted in a cylinder d placed centrally at the top of a
pipe or passage e that conveys the gas from the furnace. By the pressure
of steam, air, or water in the cylinder d below the said piston the
same will be raised, and will raise the conical valve a and close the 1
mouth 6 of the furnace as shewn. The charge of minerals is placed upon
the conical valve and charger in readiness for supplying the furnace.
To open the mouth of the furnace the steam or other fluid at the bottom
of the cylinder d is allowed to pass through a small cock or valve to the
top of the said cylinder, permitting the conical valve a to open and the 1
minerals to descend in the furnace. The descent of the valve a and the
entrance of the minerals into the furnace are regulated by the said
cock.
This improved apparatus is secured to the charging plate. When the
said conical hollow valve a is raised and closed the gas from the furnace 2
will pass through the central passages c and e. To the central pipe or
passage e I connect a pipe f, which may be arranged to convey the gas
taken from the furnace to any desired place or position.
When two or more furnaces are connected with one main gas flue I
arrange inside the aforesaid pipe f a throttle valve g as shewn, which 2
acts in combination with the hollow conical valve a when the latter is
down or open, thereby preventing the return of gas from the said main
flue into the furnace. This gas pipe valve or throttle valve g may be
applied to any gas furnace in ordinary use.
The hollow conical double beat valve a may be arranged in combina- 3
tion with the ordinary beam and balance weight instead of the cylinder
and piston for operating or adjusting the valve, the apparatus being for
this purpose constructed as shewn in Figure 2..
Having thus described my said Invention, and shewn how the same
may be conveniently and advantageously carried into practice, I wish it 3
understood that I claim,-
First. The improved charger and double beat conical valve constructed

page_text: and operating in the mouth or top of a furnace as herein set forth and
for the purpose specified.
Second. The combination of the said valve with the cylinder and
piston or with other apparatus for operating or adjusting the valve as
herein specified.
Third. The throttle valve in the gas pipe for preventing the return of
the gas while the furnace is being charged as herein set forth.
In witness whereof, I, the said Thomas Evan Williams, have here-
unto set my hand and seal, this Thirtieth day of May, in the
year of our Lord One thousand eight hundred and seventy-
four.
Witness,
JOHN HYNDMAN.
THOMAS EVAN WILLIAMS. (L.S.)