An Improved Slow Combustion Stove.
Year: 1892

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by HESPERE SEREBRIAKOFF, of 136, Rue Victor
Hugo, Levallois-Perret, France, Engineer.]
An Improved Slow Combustion Stove.
I, ERNEST DE PASS, of 78, Fleet Street, in the City of London, Fellow of the
Chartered Institute of Patent Agents, do hereby declare the nature of this inven-
tion 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 accompanying drawings and to the letters and figures marked thereon, that
is to say:
This invention relates to an improved economical and slow combustion stove
which is capable of being arranged as a fixture, or may be mounted upon wheels so
as to be portable, and readily moved about from one room to another.
In order that the invention may be readily understood I have shown, by way of
example, in the accompanying drawings a portable stove constructed in accordance
therewith.
Fig. 1 is an axial section of the stove taken on the line A, B, of Figs. 2 and 3,
and
Figs. 2 and 3 are transverse sections of the same, taken respectively on the
lines C, D, and E, F, of Fig. 1.
This stove consists of the following parts:-viz.:
Two vertical concentric cylinders of circular or polygonal section, and com-
posed of "asbestos iron,' the composition of which material will be hereinafter
indicated.
A fire place composed of refractory bricks.
An iron fuel reservoir, lined with refractory clay.
An ash pan or tray, having a regulator.
A pipe having a regulator.
The cylinders 1 and 2 are made of asbestos iron, that is to say they are each
composed of three superposed layers, an inner layer of iron and two outer layers
of asbestos, the distance between the two cylinders being at least inch.
The fire place 3 is located within the cylinder 2, and is composed of several
superposed annular bricks. Its lower portion consists of an annular refractory
piece or block 4, the inner walls of which are formed as a truncated cone, and
provided with lateral holes or passages 5, 5, arranged at different levels, and in
various directions. A space of at least 24 of an inch is left between this annular
piece and the inner wall of the cylinder 2. This first ring 4 is surmounted by a
second ring 6, which fits closely against the inner wall of the cylinder 2, and is
formed, at its lower part, with a deep channel 7, having its upper side pierced with
vertical holes 8, 8. The succeeding annular bricks 9, 9, which are thinner, are
situated one above the other, and the wall of the last or uppermost one is reduced
in thickness on one side and cut away on the other. A brick or asbestos iron
partition or diaphragm 10 caps the series.
The inner cylinder 2 is provided with a series of holes 11 on a level with, and in
front of, the cut away portion of the last or uppermost brick, said holes enabling
the gases to enter the space between the two cylinders 1, 2, by following the course
indicated by the arrows.
The fuel reservoir 12, is an iron cylinder lined with refractory clay or bricks,
and descends as far as the annular piece, block, or brick 6.
The two cylinders 1, 2, are cut away at their lower part for the reception of the
ash pan 13. The outer cylinder receives the pipe 14, through which the gases of
combustion escape. These two cylinders are connected and held together by means

page_text: of two iron or steel plates 15 and 16, which are lined with a layer of asbestos and
clay. The upper plate 15 is provided with a central hole which is closed by means
of a screw cover 17. Wheels 18 may be fitted to the lower plate.
The ash-pan 13, consists of an iron or asbestos case which, when in place,
.,hermetically closes the front opening, and it is furnished, on its outer face, with a
regulator 19 of ordinary construction, to enable the entry of air to be regulated.
The pipe 14 is also furnished with a regulator 20, in the form of a valve, or butterfly,
for regulating the exit of the gases of combustion.
A cast iron grate 21 is situated in the interior, and at the lower part of the first
or lowermost brick ring 4.
The cover 22 is of marble or metal.
Combustion is effected in the following manner :-
A quantity of live coal is introduced into the fire place, the reservoir is filled
with fuel and the stove is closed by the screw cover 17. Air enters through the
openings in the regulator 19, into the ash pan, passes through the grate and through
the holes or passages 5 into the fire place where it supports combustion. The gases
of combustion filling the circular channel 7, rise up through the holes 8, pass through
the holes 11, into the space between the two cylinders which they fill, and finally
escape through the pipe 14 to the chimney.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
1. The improved slow combustion stove in which the fire place is built up of
fireclay sections or rings constructed and arranged substantially as herein before
described and shown.
2. The improved fixed or portable slow combustion stove having its parts con-
structed, arranged, and combined substantially as herein described and as shown
with reference to the accompanying drawings.
Dated this 18th day of October 1892.