Improvements in and relating to Smoke-consuming Stoves for Heating and Ventilation.
Year: 1896

page_text: Date of Application, 30th Jan., 1896-Accepted, 14th Mar., 1896
COMPLETE SPECIFICATION.
Improvements in and relating to Smoke-consuming Stoves for
Heating and Ventilation.
We, FRANZ JOSEF REINISCH, Engineer, and STANISLAUS OSIECIMSKI, both
of No. 12 Skarpowskagasse, Lemberg, in the Empire of Austria, Manufacturers,
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 smoke-consuming central heating and ventilating stoves
of peculiar construction.
In the accompanying drawing:-
Figures 1 and 2 show longitudinal sections taken at right angles to each
other, and
Figures 3 and 4 horizontal sections on the lines x, y, and y, z, Figures 1 and 2,
illustrating one form of our improved stove.
1 is the casing of the stove which is built of fire-resisting material; 2 is the
combustion-chamber; 3, 3 are the fire-bars of the basket-shaped grate; 4 is the
reserve or auxiliary grate, which consists of a complete button piece 4 with side
walls 5 and a front wall 6, and forms a sliding box without a rear wall; the bottom 4
rises towards the front wall 6, so that an inwardly inclined bottom surface is
provided. The front wall 6 can be tightly closed by means of a suitable door.
The rear wall of the stove is provided at 7 with a suitably formed groove, into
which the rear free edge of the bottom piece 4 of the grate and the free edges of
the side-walls 5 extend, so that, when the reserve or auxiliary grate is slid into its
place, the sliding box is thereby completed on all sides; the said auxiliary grate
so surrounds the lower part of the fire-grate 3 that the latter is partly sunk in the
sliding box 4-7 to within a small space 8 of the bottom thereof, and serves in this
condition as a grate for fluid fuels, or as a double grate for obtaining a complet..
combustion of other fuels, since the side walls 5 of the reserve or auxiliary grate
only partly cover over the side walls 9 of the fire-grate 3, and the glowing embers
falling through the grate 3 are completely burnt on the reserve or auxiliary
grate 4.
10 is the ash-pan, 11 the cover of the stove which is inclined from front to rear,
12 a well-fitting door for introducing the fuel, 13 a well-fitting door for the
removal of the ashes, 14 well-fitting cleaning doors or cleaning passages for the
coils hereinafter described, which passages at the same time serve as bearers for
the coils; 16 is the funnel-shaped bed of the grate 3; 17, 17 are two internal
partitions which form a kind of double-wall with the outer casing 1; 18, 18 are
air-passages provided with rotatable valves or dampers 19, which can be turned
about hinges for the purpose of regulating the air-supply. These passages 18 are
arranged between the casing 1 and the separating walls 17 on both sides and
advantageously in equal number, and all open into the space or chamber 20 in
which the air-supply is first heated and which we term the pre-heating chamber or
space. In this chamber the fresh air entering through 18 comes in contact with
the heating coil 21, moving in the direction indicated by the arrows in Figure 2,
and enters the pre-heating space or chamber 22. The branches 23 and 24 of the
heating tube 25 open into this chamber at 26 and 27, and through these tube-
openings the consumed and heated gases enter and mix with the fresh air in order
to promote the combustion. There they raise the temperature, promote the

page_text: draught and effect an increased ventilation. The side walls 9 of the grate 3 are
formed of flat rods inclined downwardly from outside to inside, so that the ashes
cannot fall sideways but only to the bottom of the grate.
In the inclined cover 11 of the furnace at 28 and 29 commence two tubes, which
belong to or communicate with the coils 30 and 25 as hereinafter described; the
combustible gases generated in the combustion-chamber 2 envelop the coils 30
and 25 and sweep along the upwardly inclined cover 11 until they reach the tube-
openings 28 and 29; following first the path of the gases entering the opening 28,
they first rise in the tube 30 which extends through the cover 11 and traverses in
an arched path a space or air-jacket 31, which is enclosed by the stove-top and the
cover or partition 11, and has the function of retaining the necessary heat at that
place; in its downward path the tube 30 again extends through the cover 11 and
passes in the form of a short coil downwards through the heating space or
combustion-chamber; it is, however, partly sunk in the casing of the stove, so that
it cannot be entirely surrounded or enveloped by the flame; at the end of this coil
it passes downwards along the wall, enters the coil 21 for heating the entering air,
and then rises again in the form of a longer coil which is entirely surrounded by
the flame and is near the shorter coil, and its end, again extending through the
cover 11 and traversing the chamber 31, passes away from the stove as the heating
pipe 30º.
In the first lower turn or winding of this longer coil, the tube is widened
so as to form a kind of retort 32 in order to thoroughly utilize the flame and effect
a rapid expansion of the gases.
The smoke-tube 25 commences at the opening 29 in the cover 11, also passes in
an arched form through the space or jacket 31, and, extending through the cover 11,
goes downwards through the centre of the smaller coil 30, bends over the fire, rises
up through the centre of the longer coil 30 and passes downwards between the two
coils, near to the wall of the furnace, until it reaches a position where it divides
into the two branches 23, 24, which have their openings 26, 27 in the pre-heating
space or chamber 22.
Since this pipe 25 brings the burnt smoke and the strongly heated gases again
into the fire in the grate, the gases are intensely heated by automatic circulation.
Near the cleaning doors 14 are provided doors or valves 15 in the coils 21, 25
and 30, to enable the said coils to be cleaned throughout their whole length.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
First. The pre-heating space or chamber surrounding the grate and into which
open tubes or passages, which bring down heated gases from the combustion-
chamber for the purpose of previously heating the air-supply, substantially as
hereinbefore described.
Second. The combination of a basket-shaped or other grate built into the casing
of the stove, and having an ash-receptacle arranged beneath it, a pre-heating
chamber, a coil therein for heating the air entering through the air-inlet passages,
and two coils or tubes arranged in the combustion-chamber and commencing in an
intermediate-cover of the stove, one of which coils or tubes is made with a shorter
spiral partly exposed to the flame and with a longer spiral fully exposed thereto,
and is connected at one end to the coil for heating the entering air, and at its
other end to the delivery or heating pipe, while the other coil or tube exten·ls
through the middle of the said spirals and between the same and opens through
two branches into the pre-heating chamber, an intense circulation and heating of
the gases being thereby produced, substantially as described and for the purpose
specified.
Third. A reserve or auxiliary grate arranged beneath the fire-grate, and
comprising a bottom surface rising towards the front wall and provided with side
walls which surround the lower part of the basket-shaped grate, while the rear-wall
of the reserve or auxiliary grate is formed by the engagement of the free bottom

page_text: and side edges in a suitable groove in the rear wall of the stove, the side-walls of
the grate being held up by inwardly inclined bars, which prevent falling of the
ashes into the pre-heating chamber, substantially as described, and for the purposes
specified.
Fourth. The provision of suitable valves or doors on the several coils, in
combination with cleaning doors or cleaning passages in the casing of the stove,
for permitting the cleansing of the several coils throughout their whole length,
when required, with the aid of the said valves or doors, substantially as
described.
Fifth. The improved smoke-consuming central heating and ventilating stove
constructed substantially as hereinbefore described and operating as and for the
purposes above specified.
Dated this 30th day of January 1896.
D. YOUNG & Co.,
11 & 12 Southampton Buildings, Loudon, W.C.,
Agents for the Applicants.