IMPROVEMENTS IN GAS STOVES
Year: 1876

page_text: LETTERS PATENT to Léon Van der Kelen, of Brussells, in the Kingdom of
Belgium, for the Invention of "IMPROVEMENTS IN GAS STOVES."
LEON VAN DER KELEN, of Brussells, in the Kingdom of Belgium.
IN GAS STOVES."
"IMPROVEMENTS
This Invention relates to improvements in the means of heating apartments and
other places by gas stoves, with the object of obtaining the largest amount of heat
from a given consumption of gas as well as effectually discharging to the exterior of
the building all injurious products of combustion.
The stove consists of a cylindrical external casing slightly tapering towards the
upper part which encloses an inner cylinder of an inverted conical form, the lower
part sloping down rapidly so as to form a suitable surface for the gas flame to
impinge upon. The upper part of this inner cylinder terminates in a flange which
enters a hollow rim below the cover of the stove and containing sand for the purpose
of sealing the joint. The lower part of the inner cylinder terminates in a tube
which is carried away under the floor, and may be used for conveying heated air to
another apartment or for introducing fresh air from without.
The burner which forms the heater is, by preference, of a double concentric form
and the gas is conveyed thereto by duplicate pipes, so that one or both burners may
be used according to the heat required. A certain proportion of air is allowed to
flow in with the gas, so as to obtain the maximum of heat therefrom.
Between the inner and outer cylinders there is arranged a spiral screw or inclined
plane, the object of which is to absorb all the heat from the gas and impart it to
the external casing. At the upper part of the outer casing is a lateral outlet which
carries away all injurious products of combustion. A door is fitted in front of the
stove, so as to afford ready means of lighting the burners. In this arrangement of
Price Gd.1

page_text: stove the consumption of gas is economised to the full extent, and the utmost
heating power is obtained from it.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Léon Van der Kelen in the Great Seal Patent Office on the 25th
May 1877.
LÉON VAN DER KELEN, of Brussells, in the Kingdom of Belgium.
IN GAS STOVES."
"IMPROVEMENTS
This Invention relates to improvements in the means of heating apartments and
other places by gas stoves, with the object of obtaining the largest amount of heat
from a given consumption of gas as well as effectually discharging to the exterior of
the building all injurious products of combustion.
The stove consists of a cylindrical external casing slightly tapering towards the
upper part which encloses an inner cylinder of an inverted conical form, the lower
part sloping down rapidly so as to form a suitable surface for the gas flame to
impinge upon. The upper part of this inner cylinder terminates in a flange which
enters a hollow rim below the cover of the stove, and containing sand for the
purpose of sealing the joint. The lower part of the inner cylinder terminates in a
tube which is carried away under the floor, and may be used for conveying heated
air to another apartment, or for introducing fresh air from without.
The burner which forms the heater is by preference of a double concentric form,
and the gas is conveyed thereto by duplicate pipes, so that one or both burners may
be used according to the heat required. A certain proportion of air is allowed to
flow in with the gas so as to obtain the maximum of heat therefrom.
Between the inner and outer cylinders there is arranged a spiral screw or inclined
plane, the object of which is to absorb all the heat from the gas and impart it to
the external casing. At the upper part of the outer casing is a lateral outlet which
carries all injurious products of combustion. A door is fitted in front of the stove
so as to afford ready means of lighting the burners. In the arrangement of stove
the consumption of gas is very small compared to the quantity of heat obtained.
And in order that my Invention may be better understood and more readily
carried into operation, I will now proceed to describe the Sheet of Drawings here-
unto annexed.
Figure 1 is a front elevation; Figure 2, a side elevation; Figure 3, a plan;
Figure 4 is an inverted plan shewing openings for the admission of air; Figure 5
is a vertical section of the stove shewing the circuit taken by the products of com-
bustion before reaching the chimney, and Figure 6 is a sectional plan shewing the
crown or burner.
The
The two cylinders A and B are conical and arranged in opposite directions.
cylinder B terminates in a flat inverted cone C which receives in a direct manner
the heat from the double crown or burner D. This cylinder, which is provided at
its upper end with a flange fitting in a rim E filled with sand, terminates below by
a tube or pipe F running under the stove or being carried beyond it so as to heat
the air in the room or to introduce sonic from the outside. The double crown or
burner D, Figures 5 and 6, has two separate conducts to which the gas is supplied
through the pipes H, H, in communication with the tube I; this arrangement
allows a fire more or less intense to be obtained in proportion to the quantity of gas
which is admitted into one or both the compartments of the burner D by means of
the taps J, R. The gas which enters the pipes I carries with it through the
openings L, L, a certain quanity of air producing a flame of great intensity. The
products of combustion pass through a screw placed in the outer compart-
inent of the stove, and thus utilizing the whole of the heat; this screw may be
dispensed with, using only the sides of the conical cylinders. A door U serves to
light the gas and a transparent cover enclose the entire stove.

page_text: Having now particularly described and ascertained the nature of my said Inven-
tion, and how the same may be carried into operation, I would have it understood
that what I claim and desire to secure by the herein-before in part recited Letters
Patent is, the use and construction of a heating and ventilating stove for using gas
fuel, and constructed with two conical cylinders, a special arrangement of crown or
burners with the inlet pipés, flues, and other parts in connection therewith,
substantially as herein-before described and illustrated by the accompanying
Drawings.
In witness whereof, I, the said Léon Van der Kelen, have hereunto set my
hand and seal, this Twenty-fifth day of May, in the year of our Lord One
thousand eight hundred and seventy-seven.
LÉON VAN DER KELEN. (L.S.)