IMPROVEMENTS IN GAS-STOVES
Year: 1883

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesex, for
an Invention of IMPROVEMENTS IN GAS-STOVES communicated to him from
abroad by Robert Kutscher, of Leipzig, in the kingdom of Saxony,
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 13th June 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "IMPROVEMENTS IN GAS-
STOVES," a communication to me from abroad by Robert Kutscher, of Leipzig, in
the kingdom of Saxony,
This invention has for its object the construction of gas stoves by means of
which the heat generated by the gas may be more completely utilized than has
hitherto been the case.
For this purpose I apply a series of horizontal pipes placed over the burner and
also some inclined pipes, which pipes are heated outside by the gases of combustion
and serve to heat the air which passes through the pipes.
I also connect the gas inlet with the register or valve placed in the discharge
pipe for the gases of combustion, for the purpose of regulating the gas supply.
If the stove has to be applied for cooking purposes I place over the burner a
suitable tube, over which the air-heating pipes are situated, and for producing
warm water I replace the said tube by a pipe coil provided with a water inlet and
an outlet and suitable valves or stopcocks.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan in the Great Seal Patent Office on the
11th December 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "IMPROVEMENTS IN GAS-
STOVES," a communication to me from abroad by Robert Kutscher, of Leipzig, in
the kingdom of Saxony,
The invention hereinafter described and illustrated in the accompanying
drawings Fig 1 to 8 has for its object the better utilisation of the heat generated
by gas stoves and to construct a stove which requires but a small space and is
easily portable. The improved stove is constructed as follows:-
In the lower part is situated the air supply pipe and the mixing apparatus.
The gas mixed with air is led through a tube to one or more burners which may
be of various shapes according to requirements.
The modification illustrated by Figs 3 to 8 represents a stove adapted for heating
rooms only, and which has a number of heating pipes R heated outside by the
gases of combustion and through which the air to be heated passes with great
rapidity.
The rate of speed at which the air passes through the heating pipes depends on
the inclination of the latter. The pipes as well as the walls of the stove are made
of thin sheet iron.
By the application of the pipes R the heating surface is largely increased and a
rapid circulation of the air is produced.
For the purpose of preventing the heating pipes from becoming red hot a tubular
grate T is arranged over the burner or burners, which grate receives the heat
generated by the burners in the first instance, and imparts it again to the heating
surface. By this arrangement a continued heating of the stove is obtained
and the contact between the air of the room with a red hot metallic surface
prevented.
If the stove is used for cooking purposes a pipe of corresponding size is arranged
over the burner and over this pipe is situated the system of heating pipes heated
outside by the gases of combustion.
Under the roasting plate may also be placed a tubular grate, in this case,
however, the pipes comprising the grate form a worm or coil and by leading water
through the same the latter may be rapidly heated for which purpose the tubular
grate is connected with a water reservoir while the last pipe is provided with a
let off cock.
The capacity of accurately regulating at will the amount of heat radiated by the
stove, is still more increased by connecting the gas inlet valve or equivalent
regulating apparatus directly with the discharge valve or register for the gases of
combustion.
As soon as the supply of gas is diminished the area for the escape of the gases
of combustion is correspondingly diminished, which is obtained by connecting the
valves and their levers by means of the connecting rod S
The construction of the stove may be modified according to requirements and
the chamber A (see Fig 3) may serve for the reception of an evaporating vessel or
as an appliance for heating any material.

page_text: 2. Connecting the regulating valve or equivalent apparatus for the gas supply of
gas-stoves, with the valve or register for controlling the area of the outlet for
the gases of combustion, substantially as described.
3. In gas stoves the combination of a cooking appliance, with a tubular grate
situated above the burner or burners and air heating tubes, situated over the
grate, substantially as described.
In witness whereof I the said Herbert John Haddan have hereunto set my
hand and seal this 11th day of December A.D. 1883.