Improvements in Hot-air Stoves.
Year: 1889

page_text: Date of Application, 12th Feb., 1889
Complete Specification Left, 6th Nov., 1889-Accepted. 7th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Hot-air Stoves.
I, ANTON GNEZDA, of Telacicplatz, No. 20, Agram, in the Province of Crotia, in
the Austro-Hungarian Empire, Merchant, do hereby declare the nature of this inven-
tion to be as follows:-
The present invention relates to improvements in that class of heating stoves which
have a central pipe adapted to heat a current of air passing through it. It has for its
object the providing for a quick circulation of the air to be warmed, and consists in
the combination with the body of the stove of one or more air pipes of iron, copper,
clay, or other suitable material, which pipe or pipes are in communication at both
their extremities with either the atmosphere of the room to be warmed or with the
open air.
My invention is equally applicable to stoves already in use and to the bodies of new
stoves specially constructed to receive it.
In carrying my invention into effect, I provide one or more heating pipes, separate
or branching from a common source; and lead them upwards in any suitable direction
through the flue through which the hot gases are flowing.
I propose to enlarge the heating pipes over the fuel into a chamber of suitable
shape and capacity.
Baffles may be introduced into the flue.
1 do not confine myself to any particular number of pipes nor to their shape in
cross section.
Suitable regulators may be applied to either or both ends of the pipes.
The air supply to the cockle is supplemented, when desirable, by a second one admitted
to the annular space between the cockle and the stove body, from which it flows on to
the top of the incandescent fuel or into the hot gases.
An additional heating chamber may be formed by fitting the stove body with a
jacket furnished with proper inlets and outlets.
Dated this 134h of Wah 1000
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Hot-air Stoves.
I, ANTON GNEZDA, Merchant, of Agram, Croatia, 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:-
The present invention relates to improvements in that class of heating stoves which
have a central pipe adapted to heat a current of air passing through it. It has for its
object the providing for a quick circulation of the air to be warmed; and consists in the
combination with the body of the stove of one or more air pipes of iron, copper, clay,
or other suitable material, which pipe or pipes are in communication at both their
extremities with either the atinosphere of the room to be warmed or with the
open air.
My invention is equally applicable to stoves already in use and to the bodies of new
stoves specially constructed to receive it.
In order that my invention may be thoroughly understood, 1 will describe it in
detail, referring in so doing to the accompanying drawings which are to be taken
as part of this specification.
Dios. 1 and 2 are sectional elevations.

page_text: Fig. is a sectional elevation of a modification.
Fig. 4 is an horizontal section taken on the line - of Fig. 3.
Fig. 5 is a part sectional elevation of a further modification.
Fig. 6 is a plan of the central pipe.
Fig. 7 is a vertical section of a further modification; and
Fig. 8 is a horizontal section taken on the line y-y of Fig. 7.
Similar letters of reference refer to corresponding parts throughout the figures.
A is the body of the stove; and a the air-heating pipes. The latter may be of any
suitable section, and corrugated.
The elbow-chambers, or enlargements, a', in the pipes are directly over the fire-
grate F, so that both they and the pipes are exposed to the direct heating power of
the fuel.
•
The cold air flows into a pipe a at the lower mouth b, and, after having become
heated in its passage through the pipe, flows from its upper end c, and is mixed with
the other and colder air, thereby gradually raising the temperature of the room, as all
the air therein passes through the pipe a.
According to the size of the stove, there may be provided one (Figs. 3, 5, and 7),
two (Fig. 2) or more, pipes; the air inlets of which may be under, or at the side
of, the stove, as may be preferred. They may be provided with any suitable
regulator.
It is also to be understood that the heating pipes may be arranged in zigzag or
spiral lines ; or they may be enlarged into heating chambers above the fire grate, as
shewn in Figs. 3 to 6.
Fig. 7 represents a vertical section of a stove as it may be constructed in practice.
According to this modification, the air-heating pipe rises at first vertically from the
bottom, is enlarged just above the fire-grate F; and from there it is carried upwards
through the stove-top. The pipe may be divided into several pipes above the fire-
grate, if preferred, all being led upwards through the stove-body. As many as there
may be, they are all provided at their respective delivery-mouths with regulators, C,
of any known construction.
The cold air flows through the openings, 1, formed in the base of the stove. The air
for combustion is supplied to the fuel partly through the grate F and openings f, and
partly to the top of the cockle. D is an annular compartment between the stove-
case and the cockle. I form an opening d in the stove-case through which cold air
flows into the annular space D, where, it is thoroughly heated, and from which it
flows through the openings d' in the top of the cockle into the incandescent fuel and
escaping gases. D₁ is a sliding regulator provided for the purpose of controlling the
opening d. Baffles h', h³, may be fitted within the flue to keep the gases in longer
contact with the heating pipe.
In stoves for halls and public rooms where extra heating power is required, I form
an annular heating space by providing the shell i. The cold air flows into it through
openings and out through openings.
I do not confine myself to the pipe a in a stove constructed as illustrated in
Fig. 7 being vertical for its full length, inasmuch as it may be led out laterally
through the stove-body, as indicated by the light lines.
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 :-
-
1. The combination of a stove with a central air heating-pipe which communicates
at. its lower and upper ends with the air of the room to be warmed or with the
open air.
2. The combination of a stove with a central air heating-pipe which is enlarged
above the fire grate and communicates by both its ends with the air of the room to
be warmed or with the
open air.
3. The combination of a stove with a central air-heating pipe which is enlarged
above the fire grate and communicates by both its ends.with the air of the room to

page_text: be warmed or with the open air, the openings of which pipe are provided with adjust-
able regulating devices.
4. The combination of a stove with an annular compartment around the cockle
provided with inlet and outlet openings.
5. The combination in a stove of an annular compartment round the cockle and
provided with inlet and outlet openings and a central air-beating pipe which
communicates at both ends with the air of the room to be warmed or with the
open air.
6. The combination in a stove, of an annular compartment round the cockle,
provided with inlet and outlet openings and a central heating pipe enlarged above
the fire-grate and communicating by both ends with the air of the room to be warmed,
or with the open air.
Dated this 5th day of November 1889.
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, W.C.