Improvements in Heating Apparatus.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Heating Apparatus.
I, Dr. FRIEDRICH RÖTTER, of Carolinenstrasse, Ansbach, Bavaria, Dentist,
do hereby declare the nature of this invention to be as follows:-
My invention relates to a heating apparatus which can be heated by any
combustible material that will not produce soot, such as charcoal petroleum, spirits,
coalgas, &c. and which consists essentially of a combustion chamber containing
the fuel and, situated over this, an air chamber enclosed by a casing having air inlet
and outlet openings situated respectively at the lower and upper ends.
I will describe the said apparatus with reference to the accompanying drawings
in which
Fig. 1 shews a vertical section and Fig. 2 a sectional plan of a rectangular
construction.
Fig. 3. shews the front elevation and Fig. 4 a horizontal section on line xx
Fig. 3 of an apparatus of circular form.
The heating chamber.a in which is contained the source of heat b, is made of
suitably strong sheet metal. In the example shewn, coal gas is assumed to be the
heating material.
On the top surface c of this chamber, which is preferably of thicker metal, is
mounted a casing d which has, at its lower end, air inlet openings e, and at the
upper end air outlet openings f, and which is closed at top by a cover g. The
cross section of this casing d for the air chamber, is preferably made to correspond
to that of the combustion chamber a, but it may be of any desired form. To the
top plate c of the chamber a is fixed the flue pipe for the discharge of the
combustion gases, which passes vertically through the air chamber and thence by a
bend at i to the outside. In order that the heat of the gases may be utilised as
much as possible, the discharge flue can communicate at the back of the stove
with a serpentine flue pipe k as shown at Figs. 1 and 2..
Instead of a single discharge flue 1, two or more of smaller size may be
employed. The flue pipe h may be fixed to the plate c of the combustion chamber
in any convenient manner.
The action of the apparatus is as follows:-
:-
The hot combustion gases produced in the chamber a, which is preferably
provided with a door 7, heat the top plate c of the chamber a as also, by conduction,
the casing d'of the air chamber fixed thereon, and they then escape through the
flue pipe h, in the direction of the arrows. By the differences of temperature thus
produced the outer air is made to enter through the openings e of the casing d, and
in becoming heated by contact with the plate c and flue h, it rises up and escapes
through the openings f into the outer air again, such flow taking place continuously
and producing a continuous and effective heating action.
For still farther. increasing the effectiveness of the apparatus there may be
provided in the air chamber, partitions m which may either be flat or corrugated as
shewn, and which at the same time serve to strengthen the casing d; they may
with advantage be fixed to the plate a of the combustion chamber, so as to be
heated by conduction.
By means of these partitions m the heating surface is increased, and the air
chamber is divided into several compartments, that act like flues for the upward
circulation of the heated air.

page_text: The casing d may advantageously be made of aluminium while the flue pipe / is
preferably made of sheet copper, the plate c being made of aluminium bronze.
The above described heating apparatus may also be constructed with a grate in
the chamber a for the combustion of solid fuel.
Dated this 23rd day of December 1895.
ABEL & IMRAY,
Agents for the Applicant.
improvements in Heating Apparatus.
I, Dr. FRIEDRICH RÖTTER, of Carolinenstrasse, Ansbach, Bavaria, Dentist,
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 a heating apparatus which can be heated by means of
any kind of fuel, whether in solid, liquid or gaseous form, for example charcoal,
petroleum, spirits, illuminating gas &c., and which consists essentially of a heating
chamber of any suitable form containing the source of heat, and of a box or casing
placed upon the former, and having air inlet and air outlet openings, such casing
having one or more flues passing through it for carrying off the combustion gases.
On the accompanying drawing
Fig. 1 shews a vertical section of such an apparatus made by way of example
of a rectangular cross section. Fig. 2 shews a plan view, the cover plate being
removed.
Fig. 3 shews an elevation of a similar apparatus of circular cross section.
Fig. 4 shews a horizontal section on line xx Fig. 3.
Figs. 5 and 6 shew respectively a part longitudinal section and part cross
section of a modified construction of the apparatus.
Referring to Figs. 1 to 4, the heating chamber a in which is the source of heat b
is constructed of any suitable form of strong sheet metal.
"
In the construction shewn, b is a gas supply pipe provided with burners, so that
illuminating gas can be used for heating.
T
34,
On the top of the heating chamber a, which is covered by a plate c, is mounted a
box or casing d which is provided at its lower end with air inlet holes e aud at
its upper end with air outlet holes f, and which is closed in at top by a plate g.
The cross section of the box d may be of any configuration, but preferably the
same as that of the heating chamber a.
On an opening in the plate c covering the heating chamber a is mounted a pipe /
for leading off the combustion gases, which passes vertically through the air
chamber d, through the upper part of the back of which at it passes to the outside.
"For the purpose of more effectually utilising the beat of the combustion gases
the flue pipe can be extended externally in zigzag or other form as shewn, by way
of example at k, Figs. 1 and 2, or the pipe / may be, made of zigzag or serpentine
form in the air chamber itself.
4718
Instead of having only one flue pipe h, there may be two or more, such, of
a smaller section. The action of the heating apparatus is as follows:
.
The hot combustion gases passing up from the source of heat b in the chamber, a
which is preferably, provided with a door l, firstly heat the plate.c and the casing d
of the air chamber and then pass off through the flue pipe in the direction of the
arrow shewn at Fig. 1.
The outer air entering d through the openings e is heated by the radiating action
of the source of heat aud also by contact with the plate c casing d and flue pipe h,
and in rising upward in the air chamber, it issues again through, the openings f,

page_text: fresh quantities of air being drawn in through the openings e by the draught.
produced.
The circulation of air through the apparatus being thus rendered continuous, the
heating effect thereof on the surrounding atmosphere is also continuous. In order
still farther to increase the effect of the apparatus, there may be provided in the
air chamber smooth, or as shewn in the drawing corrugated partitions m, which.
serve at the same time to stiffen the casing d and which are preferably placed
directly upon the plate c of the heating chamber a, so as also to be directly heated
by the source of heat b.
By means of these partitions m the heat transmitting surfaces are greatly
increased and the air chamber is divided into several compartments, which act as
flues in accelerating the circulation of the heated air.
In the arrangement shewn at Figs. 5 and 6 the burner openings of the gas tube b
are directed downwards.
By this means the flames become much greater and as the burner becomes highly-
heated, the flame is also considerably hotter.
The bottom layer of air thus heated is led by a curved copper or brass plate n so-
as to issue through the open front side of the heating chamber and thus heats the
floor of the room.
The above described heating apparatus can of course also be heated by the
combustion of solid fuel on a grate.
Having now particularly described and ascertained the nature of this inven--
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A heating apparatus consisting of a heating chamber a, and an air chamber d
fitted on the top thereof, through which pass one or more flue pipes h for the
combustion gases, and which has air inlet openings e at bottom and air outlet.
openings fat top.
2. A heating apparatus consisting of a heating chamber a an air chamber d
having air inlet holes e at bottom, air outlet holes fat top, and internal smooth or
corrugated partitions m, serving both for transmitting heat and for stiffening the
casing of the chamber, and one or more flue pipes h passing through said chamber
from the combustion chamber.
'
3. A heating apparatus consisting of a heating chamber a containing a gas pipe-
with downward directed burners, and a directing plate n for directing the hot air-
through the open front of the chamber on to the floor, an air chamber d having air
inlet holes e and air outlet holes and one or more flue pipes passing through the
air chamber from the heating chamber.
Dated this 17th day of October 1896.
ABEL & IMRAY,
Agents for the Applicant..