Year: 1886

page_text: Date of Application, 11th May, 1886.
Complete Left, 11th Feb., 1887.
Complete Accepted, 15th Mar., 1887.
I, HERMANN HELM, of 12 Währingerstrasse, Ober-Döbling, near Vienna, Austria,
Stove Manufacturer do hereby declare the nature of this invention to be as follows:-
This invention relates to stoves adapted to be charged at the top.
29
It is well known that a stove charged at the top, such for instance as a "Meidinger"
stove is composed of a cast-iron fire-place and of a sheet-iron casing surrounding this
fire, and open at the top and bottom.
Heretofore this charging opening of said fire place has been provided with a neck
extending outwardly through a hole in the casing.
According to the present invention this neck is dispensed with and a funnel-shaped
depression is formed upon the top of the fire-place, an opening having a cover, being
formed at the bottom of the said depression and serving for charging the stove.
Owing to this arrangement the casing can be removed if the fire-place is to be
cleaned, without necessitating the movement of the said fire-place. Moreover the
internal casing which prevents the direct radiation of the heat upon the external casing
is constructed of a plate of flexible sheet metal, the edges of which are not connected
in such a manner that despite the diameter of the parts at the upper extremity of the
fire-place being greater than those below this internal casing can also be removed
without difficulty.
According to the present invention the fire place is composed of several cylindrical
pieces or sections of cast iron, of a top section having the charging opening, and of
the lower section provided with the grate. The top section is provided with a
depression which serves as a charging funnel, and with a pipe permitting the
connection of the fire-place with the smoke pipes.
The lower section has more or less the form of a sector of a hollow ring and in
transverse section may be semi-circle rectangular or of any other suitable shape. One
end of this section is connected with the lower cylindrical section, while the other end
is provided with a door movable upon a horizontal axis and capable of sliding along
this axis. By giving the lower section the described shape, a space is formed in the
interior casing around the lower part of the fire place, into which space air can freely
enter, through the bed-plate.

page_text: The foot or support for the fire-place is preferably in the form of a hollow cylinder,
the sides of which are provided with holes. The air circulating through these holes
cools the lower wall of the lower section, so that the disc which forms the base of this
foot and is considerably heated is prevented from burning the floor upon which the
stove stands.
In order to connect the sections of the fire-place parts with the bed plate, the top
section is provided with two lugs having holes through which pass rods hooked to
radial arms on the bed-plate. The upper ends of the said rods are screw-threaded,
and provided with nuts to be fixed thereon.
The cylindrical sections forming the fire-place are sometimes provided with projecting
ribs. These ribs increase the area of the heated surface and moreover maintain the
internal casing in the proper position.
The depression in the upper section is more or less in the form of a cone the axis of
which is inclined. This depression serves as a charging funnel, and the charging
opening at the bottom of this funnel is closed by means of a cover.
The wall forming
the bottom of this funnel and its lateral walls are extended forward to form lips with
which is engaged the funnel-shaped mouth of the frame of the charging door, this
frame being fixed in the external casing of the stove. By reason of this arrangement
the introduction of fragments of fuel between the two casings is obviated.
The said depression, instead of being of a conical form may also be of cylindrical
prismatic, spheroidal, pyramidal, or of any other suitable shape.
The pipe for the connection of the fire place with the smoke pipe can form one piece
with the section having the charging funnel. or be separate therefrom. In the latter
case an auxiliary cylindrical section can be interposed between the upper section and
the said pipe.
When the stove is to be charged, the charging door is first opened and then the
cover at the bottom of the charging funnel is removed by means of a hook. The
cylindrical space of the fire place is then charged with coal or coke up to the level of
the said charging door.
The stove being charged, the fuel can be lighted, by making on the surface thereof
a fire of chips or small wood, afterwards replacing the said cover. The inclined wall
which is formed by the cover above the fire, and the contraction of the flue resulting
from the arrangement of the charging funnel cause the flame to be directed against
the fuel and the fire to pass in a short time to the grate.
At the joint between the lowest cylindrical section and the lower section is interposed
a ring, the object of which is to prevent the burning of this joint, which is exposed
to the most intense heat. If burning takes place, the said ring only requires to be
replaced, which is a less troublesome and expensive operation than the renewal of the
cylindrical section or of the lower section..
The grate may be arranged in the ordinary manner immediately below the
cylindrical receptacle for the fuel, or it may be placed lower and have at its front
edge a vertical grate which does not extend to the said receptacle. Between the bars
of this vertical grate a poker can be introduced, and above the said grate can be
inserted a perforated plate or an auxiliary grate, in case the lower grate is to be
withdrawn for removing clinkers and the like therefrom.
The ash-box placed below the grate is of a form corresponding to the transverse
section of the neck.
The cover on the extremity of the lower section can be displaced longitudinally of
its axis so that any desired size can be given to the opening through which the air for
supporting combustion enters. In order that the cover can be fixed in any position
in which it has been placed, its interior edge carries a stop acted upon by a spiral
spring, the head of which stop engages between the teeth of a rack arranged at the
lower surface of the opening. For preventing, at the same time, the displacement of
the cover by persons who are not authorized to do so, the stop is so constructed that
it can only be drawn back by the aid of a key which is screwed on the stop. When
the cover is turned back upon its axis it will rest against a tappet cast in one piece

page_text: with the supports of the axis; any damage to the exterior casing by this cover is thus
prevented.
The exterior sheet-iron casing is provided at its lower end with a suitable opening
adapted to pass over the neck of the lower section, and which extends to the lower
edge of the casing; this casing can therefore be removed by lifting it.
In order that it shall be possible to remove the interior casing also, in spite of its
small diameter, and of the smoke pipe and the projecting lip of the charging opening,
this casing is constructed of flexible sheet-iron, and its edges instead of being joined
by means of rivets are connected by means of studs fitting into suitable holes.
An inverted sheet-iron cone suspended at the upper part of the external casing is
employed to divide the volume of heated air which rises in this casing.
If the hot air is to be purified by removing the dust which it may carry I suspend
in the upper part of the casing a hollow cylinder formed of a framing of sheet-iron
or of wire-work which is surrounded by cloth or any other suitable fabric. The flanges
at the upper edge of this cylinder are fixed to the crown of the stove. Upon these
flanges can be placed a vessel filled with water, for imparting to the air a sufficient
degree of humidity. For increasing the area of this air-filter, its vertical sides can be
corrugated.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements relating to Heating Stoves.
I, HERMANN HEIM, of 12 Währinger-sirasse, Ober-Döbling, near Vienna, Austria,
Stove Manufacturer 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 :-
32
This invention relates to stoves adapted to be charged at the top.
It is well known that a stove charged at the top, such for instance as a Meidinger
stove, is composed of a cast-iron fire place and of a sheet-iron casing surrounding this
fire place and open at the top and bottom.
Heretofore the charging opening of said fire place has been provided with a neck
extending outwardly through a hole in the casing.
According to the present invention this neck is dispensed with, and a funnel-shaped
depression is formed upon the top of the fire-place, an opening having a cover being
formed at the bottom of the said depression and serving for charging the stove.
Owing to this arrangement the casing can be removed, if the fire place is to be
cleaned, without necessitating the movement of the said fire place. Moreover, the
internal casing, which prevents the direct radiation of the heat upon the external
casing, is constructed of a plate of flexible sheet-metal, the edges of which are
connected in such a manner that, despite the diameter of the parts at the upper
extremity of the fire-place being greater than those below, this internal casing can be
removed without difficulty.
The said invention is illustrated in the accompanying drawing in which,
it.
Figures 1 and 2 are two vertical sections, of a stove, at right angles to one another;
Figures 3 and 4 are vertical sections at right angles to each other, showing
modified arrangement of the lower part of the fire place, and
Figure 5 is a horizontal section of the same, showing the sliding door by means of
which the entrance of air is regulated.
'
Figure 6 is a plan of a ring inserted in the fire place above the grate, for preventing
the burning of the wall of the said fire-place.
Figure 7 is a horizontal section through the pipe for the escape of the smoke, and
through the charging funnel of the stove shown in figure 1, and,
Figure 8 is a horizontal section of the same above the grate of the stove.
Figure 9 is a vertical section of the upper part of a stove, showing a modified
arrangement of the pipe for the escape of the smoke.
Figure 10 is a view of the tool serving to withdraw the cover from the charging
funnel.
Figure 11 shows in elevation a portion of the internal casing of sheet-iron.
Figure 12 is a plan of a perforated plate designed to be introduced under the fuel,
if the grate is to be removed for cleaning it.

page_text: Figures 13 and 14 show in vertical section, and in an underside view, the mechanism
for fixing the draught regulating door in any desired position.
Figures 15 and 16 represent, in vertical and horizontal sections, the upper part of
a stove, provided with an air filter.
According to the present invention the fire place is composed of several cylindrical
sections of cast iron; of a top section m having a charging opening and of a
lower section e provided with the grate. The top section m is provided with a
depression p, which serves as a charging funnel and with a pipe & permitting the
connection of the fire place with the smoke pipes.
The lower section e has more or less the form of a segment of a hollow ring, and in
transverse section may be semicircular as shown in Figures 1 and 2, or rectangular
as shown in Figures 3, 4 and 5, or of any other suitable shape. One end of this
section eis connected with the lower cylindrical section k, while the other end is
provided with a door movable upon a horizontal axis and capable of sliding along
this axis. By giving the lower section the described shape, a space is formed in the
interior casing M2 around the lower part of the fire-place, into which space air can
freely enter through the bed plate a.
The foot or support e' of the fire place is preferably in the form of a hollow cylinder,
the sides of which are provided with holes a. The air circulating through these
holes cools the lower wall of the lower section so that the disc b, which forms the
base of this foot e¹ and is considerably heated, is prevented from burning the floor
upon which the stove stands.
In order to connect the sections of the fire place with the bed-plate a, the top
section has two lugs integral therewith and provided with holes through which
pass rod hooked to radial arms e on the bed plate a. The upper ends of the said
rods w are screw-threaded, and provided with nuts w¹.
The cylindrical sections of the fire-place are sometimes provided with projecting
ribs ¹, as shown in Figure 5. These ribs increase the area of the heating surface,
and moreover maintain the internal casing M² in its proper position relatively to the
sections K.
The depression p in the upper section m is somewhat of the form of a cone, the axis
of which is inclined. This depression serves as a charging funnel, and the charging
opening at the bottom of this funnel is closed by means of a cover q. The wall
forming the bottom of this funnel p, and its lateral walls are extended forward to
form lips o, with which is engaged the funnel-shaped mouth of the frame., of the
charging door V, this frame being fixed in the external casing M¹ of the stove. By
reason of this arrangement the introduction of fragments of fuel between the two
casings is obviated.
The said depression, instead of being of a conical form, may also be of cylindrical,
prismatic, spheroidal, pyramidal, or of any other suitable shape.
The pipe d for the connection of the fire place with the smoke pipe can form one
piece with the section having the charging funnel, (as shown in Figures 1, 2 and 7)
or be separate therefrom as shown in Figure 9. In the latter case an auxiliary
cylindrical section 2, Figure 9, can be interposed between the section m and the said
pipe d.
When the stove is to be charged, the charging door V is first opened and then the
cover at the bottom of the said funnel is removed by means of the hook shown in
Figure 10. The cylindrical space of the fire place is then charged with coal or coke
up to the level of the door V.
The stove being charged, the fuel can be lighted by making on the surface thereof
a fire of chips or small wood, afterwards replacing the said cover 7. The inclined
wall which is formed by the cover above the fire, and the contraction of the flue at m²
cause the flame to be directed against the fuel and the fire to pass in a short time to
the grate.
At the joint between the lowest cylindrical section K and the lower section e is
interposed a ring, either in the manner represented in Figures 1 and 2, or in the

page_text: manner illustrated in Figure 3, or in any other suitable manner. The object of this
ring is to prevent the burning of the said joint, which is exposed to the most intense
heat. If burning takes place, the said ring only requires to be replaced, which is a
less troublesome and expensive operation than the renewal of the cylindrical section K
or of the lower section e.
The grate may be arranged in the ordinary manner immediately below the
cylindrical receptacle for the fuel, as shown in Figures 1 and 2; or it may be placed
lower, and have at its front edge a vertical grate n which does not extend to the said
receptacle, as shown in Figures 3 and 4. Between the hars of this vertical grate a
poker can be introduced; and above the said grate can be inserted a perforated plate y
Figure 12, or a forked grate, in case the lower grate is to be withdrawn for removing
clinkers and the like.
The ash-box A placed below the grate is of a form corresponding to the transverse
section of the section e.
The cover which is mounted on the lower section e can be displaced longitudinally
of its axis, so that the area of the opening through which the air for supporting
combustion enters may be varied as desired.
In order that the cover g can be fixed in any position in which it has been placed,
its lower edge carries a stop H acted upon by a coiled spring; the head of which stop
engages between the teeth of a rack Z arranged at the lower surface of the opening
of the section e, as shown in Figures 13 and 14. For preventing, at the same time,
the displacement of the cover by persons who are not authorized to do so, the
stop H is so constructed that it can only be drawn back by the aid of a key S,
which is screwed on the stop (see Figure 13). When the cover g is turned back
upon its axis it will rest against a tappet 7, cast in one piece with the supports of
the axis; any damage to the exterior casing M¹ by this cover is thus prevented.
The exterior sheet-iron casing is provided at its lower end with a suitable opening
adapted to pass over the neck of the lower section e, and which extends to the
lower edge of the casing, this casing can therefore be removed by lifting it.
In order that it shall be possible to remove the interior casing M² also, in spite of
its small diameter and of the smoke pipe and the projecting lip o, this casing
is constructed of flexible sheet iron; and its edges, instead of being joined by means
of rivets, are connected by means of studs fitting into suitable holes, as shown in
Figure 11.
An inverted sheet iron cone, suspended in the upper part of the external
casing M¹ can be employed to distribute the volume of heated air which rises in this
casing.
If the hot air is to be purified by removing the dust which it may carry, I suspend
in the upper part of the casing M² a hollow cylinder u (see Figure 15), formed of a
framing of sheet iron, or of wire work which is surrounded by cloth or any other
suitable fabric. The flanges at the upper edge of this cylinder are fixed to the
crown of the stove. Upon these flanges can be placed a vessel t filled with water,
for imparting to the air a sufficient degree of humidity. For increasing the area of
this air filter, its vertical sides can be corrugated, as shown in Figure 16.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim, is
First In a heating-stove the arrangement of the charging opening at the bottom
of a depression formed in the upper part of the wall of the fire-place; this depression,
which may be of cylindrical, conical, spheroidal, prismatic, pyramidal or other form
and whose axis is inclined, serving as a charging funnel, and enabling the outer
casing of the stove to be removed by simply lifting it; the funnel-shaped mouth of
the frame of the charging door engaging with lips or extensions of the walls of the
said depression, so as to prevent the introduction of fragments of fuel between
the casing and the fire-place.

page_text: Second The lower section e of the stove having the form of a segment of a
hollow ring, and provided with a foot e¹ supported on the hollow bed plate a.
Third The interposition of a cast-iron ring i at the joint between the lowermost
cylindrical section and the lower section e; this ring preventing the burning of
these parts.
Fourth-An interior casing constructed of flexible sheet iron plate, the edges of
which are connected by means of studs fitting into openings.
Fifth The device for fixing the sliding cover g in the desired position, this device
consisting of a spring stop H located in the said cover and adapted to engage with a
rack Z, upon the lower section e; the said stop being designed to be drawn back by
the aid of a key S which can be screwed on to its end.
Sixth The arrangement, on the walls of the fire-place and at a short distance
above the grate, of supports for a perforated plate y or for a forked grate the said
plate or forked grate being introduced into the fire place, when it is desired to
remove the gratef for cleaning it, without interrupting the operation of the stove.
Seventh A filter for the heated air, consisting of a hollow cylinder having its
sides and bottom covered with cloth or other thick but permeable fabric; the flanges
of this cylinder resting upon the erown of the casing of the stove.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.