IMPROVEMENTS IN APPARATUS FOR GENERATING GAS TO BE USED IN GAS FURNACES
Year: 1869

page_text: LETTERS PATENT to Julius Frölich, of No. 2, Park Villas, Lonsdale
Road, Barnes, in the County of Surrey, for the Invention of
"IMPROVEMENTS IN APPARATUS FOR GENERATING GAS TO BE USED IN GAS
FURNACES."
PROVISIONAL SPECIFICATION left by the said Julius Frölich at the
Office of the Commissioners of Patents, with his Petition, on the
28th April 1869.
I, JULIUS FRÖLICH, of No. 2, Park Villas, Lonsdale Road, Barnes, in
the County of Surrey, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN APPARATUS FOR GENERATING GAS TO BE USED IN GAS
FURNACES," to be as follows:-
My Invention has for its object improvements in apparatus for
generating gas to be used in gas furnaces, ensuring a complete utilization
of all combustible matter contained in the fuel and producing a constant
and
pure gas flame of high temperature.

page_text: My apparatus consists of two fire-brick chambers connected at the
bottom by a short flue. The first chamber contains the fuel in a
powdered state, such as small coal, coal dust, sawdust, or peat, and is fed
from time to time at the top. The fuel descends by gravity and is burnt
by the aid of fan blast entering through a number of tuyeres near the
bottom of the chamber. The gascous products of this combustion pass
through the flue into the second chamber, which is supplied from time
to time by a door placed at or near the top with coke or large pieces of
non-bituminous coal, so that all the gases resulting from the combustion
in the first-chamber are forced to ascend through a column of red hot
coke. The gas is thus converted into carbonic oxide, and is then ready
for use, and the carbonic oxide gas thus produced may be burnt by
either hot or cold blast as the process to be carried out requires a higher
or lower degree of heat. For this purpose the gases are led into the
furnace in which they are required to be used, which may be a rever-
beratory furnace, or a steam boiler furnace, or other furnace, and air
either heated or cold is admitted in suitable quantity to burn the carbonic
oxide into carbonic acid gas. The same blowing apparatus which forces
air into the fuel chambers may be employed to supply air to the furnace
in which the gas is burnt.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Julius Frölich in the Great Seal Patent Office on
the 14th October 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JULIUS
FROLICH, of No. 2, Park Villas, Lonsdale Road, Barnes, in the County of
Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of April, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
second year of Her reign, did for Herself, Her heirs and successors,
give and grant unto me, the said Julius Frölich, Her special licence
that I, the said Julius Frölich, my executors, administrators, and
assigns, or such others as I, 'the said Julius Frölich, my executor's,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term

page_text: "
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
APPARATUS FOR GENERATING GAS TO BE USED IN GAS FURNACES,' upon
the condition (amongst others) that I, the said Julius Frölich, 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 Julius Frölich, do hereby declare
the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
My Invention has for its object improvements in apparatus for
generating gas to be used in gas furnaces, ensuring a complete utili-
zation of all combustible matter contained in the fuel, and producing
a constant and pure gas flame of high temperature.
My apparatus consists of two fire-brick chambers connected at the
bottom by a short flue. The first chamber contains the fuel in a
powdered state, such as small coal, coal dust, sawdust, or peat, and be
fed from time to time at the top; the fuel descends by gravity, and is
burnt by the aid of fan blast entering through a number of tuyeres near
the bottom of the chamber. The gaseous products of this combustion
pass through the flue into the second chamber, which is supplied from
time to time by a door placed at or near the top with coke or large
pieces of non-bituminous coal, so that all the gases resulting from the
combustion in the first chamber are forced to ascend through a column of
red hot coke. The gas is thus converted into carbonic oxide, and is then
ready for use, and the carbonic oxide gas thus produced may be burnt by
either hot or cold blast as the process to be carried out requires a higher
or lower degree of heat. For this purpose the gases are led into the
furnace in which they are required to be used, which may be a
reverberatory furnace, or a steam boiler furnace, or other furnace, and
air either heated or cold is admitted in suitable quantity to burn the
carbonic oxide into carbonic acid gas. The same blowing apparatus

page_text: apparatus for generating gas combined with it; Figure 2 is an end view;
Figure 3 is a longitudinal and vertical section of the same; Figure 4 is a
transverse section taken at the line 1, 1, Figure 3.
a and bare two chambers constructed at the end of the furnace
beyond the bridge c, and d is a short flue or passage connecting these
chambers. The outer wall of the chamber a is supported by the iron
casing of the furnace, which is cast with a sill to receive it. The
partition o between the two chambers is built upon a double arch of fire-
brick, so that when the partition is burnt away at its lower part the
bottom arch may be cut out and rebuilt without disturbing the work
above it. The bottom of the flue or passage d is built upon a cast-iron
flap e, which is supported by two latch plates f, either of which will
serve to support the flap e, so that the latch plates may be raised one at
a time without disturbing the bottom flap; and by removing loose
bricks in the lining behind the latch plates access may be had to the
bottom lining to repair it when it becomes necessary, or to remove
clinkers and ashes; or when the interior arch requires reconstructing
the flap may be allowed to fall down, and free access is thus obtained
to it. g is a door at the top of the chamber a, by which it is filled with
small coal or other similar fuel not liable to cake; and h is a door at
the front of the chamber 6 by which it is charged with coke or other
suitable non-bitumenous fuel in large pieces, so as not to impede the
blast; is the blast pipe leading to a number of tuyeres k, k, blowing
into the bottom of the chamber a. The quantity of air passing to the
tuyeres is regulated by a valve; is a blast pipe or passage formed in
the bridge c; it is supplied with air from the blast pipe i, and the air
issues by a number of perforations in the top of the bridge. The
blast at the bridge is also regulated by a valve, a pressure of blast of
three or four inches of water I find to be sufficient. The air supplied
to the tuyeres k should be cold, but a heated blast may be used at

page_text: the bridge, and for the attainment of very high temperatures this is
essential.
In working the chamber a is kept constantly full to such a height
as to prevent the blast passing up through it, and the chamber 6 is
filled up at the commencement of each heat. Where fuel is used,
the ashes of which melt easily, the fluid slag is tapped out from time
to time at m, otherwise the ashes and clinkers are removed by opening
the latch plates f, as aforesaid. n, n, are holes for the insertion of pokers
or prickers when necessary to promote the descent of the small fuel in
the chamber a. The body of the furnace and the chimney or stack is of
ordinary construction.
In witness whereof, I, the said Julius Frölich, have hereunto set
hand and seal, this Fourteenth day of October, in the year of
our Lord One thousand eight hundred and sixty-nine.
my
JULIUS FRÖLICH. (L.S.)