Year: 1888

page_text: Date of Application, 13th Nov., 1888
Complete Specification Left, 18th Jan., 1889
Complete Specification Accepted, 2nd Mar., 1889
1, PHILIP MIDDLETON JUSTICE of 55 and 56 Chancery Lane in the County of
Middlesex Fellow of the Institute of Patent Agents do hereby declare the nature of
this invention to be as follows:-
==
My invention relates to an improved furnace for the production of carbonic acid gus
or carbon dioxide and the burning of calcareous material.
The furnace described is of the two storied or stage pattern. It will be understood
that the process of burning lime and the production of carbonic acid is simultaneously
carried out, the lime passing from the upper chamber which forms a preliminary
heater into the lower or burning chamber while fresh material is supplied to the
upper chamber. The said upper portion or chamber is closed to the outer air by
means of a cover plate provided with a feed opening which can be closed by a
register.
To prevent the penetration of air through the brickwork of the upper chamber
which might force down the volume of carbonic acid into the lower part of the furnace,
the whole of the outside of the brickwork is covered with a sheet iron or similar
casing and between this and the brickwork is placed a layer of sand or similar
material. The gas is drawn off through a convenient pipe for use or for condensa-
tion in the usual way. In order to support the combustion in the lower chamber air
is admitted through a channel beneath the furnace sluft, said channel being closed
by a damper which may be conveniently operated from the working platform.
During the burning the usual discharge hole at the bottom of the furnace is closed by
a door.
1
1000

page_text: 1, PHILIP MIDDLETON JUSTICE of 55 and 56 Chancery Lane in the County of
Middlesex Fellow of the Institute of Patent Agents 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 :-
This invention relates to an improved furnace for the production of carbonic acid
gas or carbon dioxide and the burning of calcareous inaterial.
To clearly explain the invention reference is made to the accompanying drawing in
which :
Fig. 1 is an elevation of the improved furnace.
Fig. 2 is a section of same on the line a—, Fig. 1, looking to the left, and
Fig. 3 is a sectional plan of same on the line cd, Fig. 1.
The furnace is of the two storied or stage pattern such as those described in specifi-
cations No. 15788 14324 152528 and 57887. It will be understood that the pro-
cess of burning lime and the production of carbonic acid is simultaneously carried out,
the lime passing from the upper chamber B which forms a preliminary heater, into the
lower or burning chamber A, while fresh material is supplied to the upper chamber.
The said upper chamber B is closed to the outer air by means of a brickwork arch
surmounted by a cover plate D which is provided with a feed opening D' which can
be closed by a cover or lid as shown.
To prevent the penetration of air through the brickwork of the upper chamber
which might force down the volume of carbonic acid gas into the lower part of the
furnace, the whole of the outside of the brickwork of same is covered with a sheet
iron or similar casing E, and betweon this and the brickwork is filled in a layer
of sand or similar material G. The sheet metal casing may be conveniently
retained in place by the metal bands as at E. The gas is drawn off through_a
convenient pipe, such as at H, for use or for condensation in the usual way. In
order to support the combustion in the lower or burning chamber A, air is admitted
through a channel I beneath the same, the openings of said channel being closed by
dampers J, one of which is shown in Fig. 1 sliding in suitable guides over the
opening and which may be conveniently operated from the working platform by
handle K. During the burning, the usual discharge hole C at the bottom of the
a

page_text: furnace is closed by a door which is not shown. Suitable apertures are provided
in different parts of the furnace for observing the progress of the burning and for
raking purposes.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, [ declare that what I claim is :-
The improved furnace provided with a preliminary heating chamber jacketed or
sheathed and a lower chamber having a damper for regulating the admission of air,
substantially as described and for the purpose set forth.
Dated this 18th day of January 1889.
PHILIP M. JUSTICE.