Improvements in and connected with Gas Burners.
Year: 1897

page_text: PORTIUALIUN.
Improvements in and connected with Gas Burners.
I, ADOLF FRANKE, Ph.D., of 23, Hagelbergerstrasse, Berlin, in the German
Empire, Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in and connected with gas burners.
When employing igniting burners with which are combined substances that
become incandescent by contact with the issuing gas and thereby kindle the ignit-
ing jet which then serves for lighting the main or principal flame, it is necessary
that the igniting flame be extinguished as soon as the principal flame is alight,
whilst the igniting flame must be relighted, as soon as the principal flame is ex-
tinguished from any cause other than the shutting off of the gas supply.
Attempts have been made heretofore to attain this object by a special shutting-
off or controlling device for the gas-supply to the igniting burner, which comes
into operation (that is to say, the gas-supply to the igniting burner is shut off)
as soon as the prinicipal flame is alight, but which automatically opens when the
principal flame is extinguished. Such mechanical devices are liable, however, to
entirely or partially fail in their operation and to thereby throw the burner out of
order.
In the apparatus forming the subject of this invention and which I term a "jet
igniter," the special mechanical controlling device for the gas-supply to the igniting
burner is entirely dispensed with, and, in order to automatically extinguish the
igniting flame, the gas-supply to the igniting burner is so connected to the gas-
supply to the main burner, or is so formed, that the gas in flowing to the main
burner produces an injector or inductive action that prevents the further supply
of gas to the igniting burner.
Moreover the gas-supply to the main burner is provided with an automatically-
acting shutting-off or controlling device which opens the gas-inlet of the main
burner as soon as the igniting flame is alight. This controlling device can be
advantageously operated by an expansible body situated within range of the
igniting and principal flames, which body is expanded by the heat and thereby
opens the controlling device. So long as the principal flame is alight, the gas-
supply thereto is kept open. If, however, the principal flame he accidentally
extinguished from any cause, the controlling device is closed, the inductive action
ceases and the gas can again flow into the supply-passage to the igniting burner
the flame from which will be again ignited, and will relight the principal flame.
The method of operation of this arrangement is as follows:-
The gas-supply pipe, which is controlled by a suitable cock, discharges the gas
hrough a nozzle which extends into a suitably formed suction-chamber in com-
munication with the valve-casing. of the burner. The chamber of this casing into
which the said suction chamber opens and towards which the said nozzle discharges
he gas, is normally closed by a suitable valve. The rod of the said valve is connected,
hrough the medium of a lever, to a tightly-stretched metal wire which is mounted
vithin thermal range of both the igniting burner and the main burner and the
ength of this wire is such that, when in its cold state, it keeps the said valve closed.
ГРМ 071

page_text: From the part of the suction-chamber where the pressure is reduced by the action of
the nozzle, there branches a gas-pipe for supplying the igniting burner, whilst
above the valve is connected the supply-pipe for the main burner. If, now, the
supply cock be opened, the gas flows through the nozzle into the suction-chamber
and valve-casing and, since the valve controlling the supply-pipe to the main
burner is closed, passes to the igniting burner. The igniting burner is then ignited
in the well-known manner,.
and the stretched wire is heated so that it yields and
enables the spring to open the valve. The latter opens slowly as the wire expands,
and a small quantity of gas is allowed to pass to the main burner. As soon as the
gas flowing to the main burner has been lighted by the flame of the igniting
burner, the wire will be further heated and the opening of the valve will be com-
pleted. The now strong inductive action set up at the mouth of the nozzle prevents
the passage of gas into the gas-supply pipe of the igniting burner. Consequently
the supply of gas to the igniting burner ceases and the igniting flame is extinguished
without any shutting off..device being. required on the gas-supply-pipe of the
igniting burner.
..
:
A simplification of this arrangement can be made if the device be employed
with an incandescent gas-light burner. The nozzle usually arranged in the mixing
tube of the incandescent gas-light burner can then be replaced by a nozzle corre-
sponding to the nozzle above mentioned. If the valve be made sufficiently large, it
will answer perfectly if the nozzle simply opens into an expanded chamber from
which the gas-supply pipe for the igniting burner extends laterally.
Instead of operating the lever and the valve by a solid material which expands
under the influence of heat, fluid or gaseous substances can also be employed which
are converted into vapour or expanded by the heat of the igniting flame and thus
caused to open the valve of the main burner. In thus employing a fluid or gaseous
substance, the latter is arranged in a suitable vessel, such for example as a tube
which is mounted near the igniting and principal flames. This tube is rigidly
closed at one end, and at the other end is closed by a membrane or flexible diaphragm
or a sealing liquid, for example, quicksilver, which, during the expansion of the
substance enclosed in the tube, acts on the shutting-off device in such a manner
that the gas inlet to the main burner is opened as soon as the substance is expanded
by the heat of the igniting flame or of the main flame. In some cases the dia-
phragm acts directly on the shorter end of the lever, and in others a float is em-
ployed which is suitably connected to the said lever. Furthermore a thermopile can
be arranged within thermal range of the igniting and main flames, the said pile
by reason of the heat of the flames generating a current which operates the shutting
off device by means of an electro-magnet excited by the current.
11
1907
Improvements in and connected with Gas Burners.
I, ADOLF FRANKE, Ph.D., of 23, Hagelbergerstrasse, Berlin, in the German
Empire, Engineer, do hereby declare the nature of this invention and in what 45
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
This invention relates to improvements in and connected with gas burners.
When employing igniting burners with which are combined substances that

page_text: become incandescent by contact with the issuing gas and thereby kindle the ignit-
ing jet which then serves for lighting the main or principal flame, it is necessary
that the igniting flame be extinguished as soon as the principal flame is alight,
whilst the igniting flame must be relighted, as soon as the principal flame is ex-
tinguished from any cause other than the shutting off of the gas supply.
Attempts have been made heretofore to attain this object by a special shutting-
off or controlling device for the gas-supply to the igniting burner, which comes
into operation (that is to say, the gas-supply to the igniting burner is shut off)
as soon as the main flame is alight, but which automatically opens when the
main flame is extinguished. Such mechanical devices are liable, however, to
entirely or partially fail in their operation and to thereby throw the burner out of
order.
In the apparatus forming the subject of this invention and which I term a "jet
igniter," the special mechanical controlling device for the gas-supply to the igniting
burner is entirely dispensed with, and, in order to automatically extinguish the
igniting flame, the gas-supply to the igniting burner is so connected to the gas-
supply to the main burner, or is so formed, that the gas in flowing to the main
burner produces an injector or suction action that prevents the further supply of gas
to the igniting burner.
Moreover the gas-supply to the main burner is provided with an automatically-
acting shutting-off or controlling device which opens the gas-inlet of the main
burner as soon as the igniting flame is alight. This controlling device can be
advantageously operated by an expansible body situated within range of the
igniting and principal flames, which body is expanded by the heat and thereby
opens the controlling device. So long as the principal flame is alight, the gas-
supply thereto is kept open. If, however, the principal flame be accidentally
extinguished from any cause, the controlling device is closed, the inductive action
ceases and thegas can again flow into the supply-passage to the igniting burner,
the flame from which will be again ignited, and will relight the principal flame.
To enable the invention to be fully understood I will describe it by reference
to the accompanying drawing in which:-
Figure 1 is a diagrammatic representation of a burner with igniting and extine-
tion device made according to my invention.
Figure 2 is a sectional elevation shewing my improvements applied to an incan-
descent gas burner.
Figures 3, 4 and 5 are views of details.
16
7 is the gas-supply pipe, which is controlled by the cock pand which discharges
the gas through a nozzle s extending into a suitably formed suction-chamber tin
communication with the valve-casing A of the burner. The chamber of this
casing A is normally closed by the valve f. The rod a of the said valve f is
connected, through the medium of a lever b, to a tightly-stretched metal wire i
which is mounted within thermal range of both the igniting burner and the main
burner B and the length of this wire is such that, when in its cold state, it keeps
the said valve f closed. From the suction-chamber t there branches a gas-pipe
for supplying the igniting burner z, whilst above the valve f is connected the
supply-pipe m for the main burner B. If, now, the supply cock p be opened, the
gas flows through the nozzle s into the chambers and vand, since the valve f is
closed, passes through the pipe n to the igniting burner z in the direction indicated
by the arrow Figure 1. The gas from the igniting burner is then ignited in the
well-known manner, and the wire i is heated so that it yields and enables the
spring to open the valve f. The latter opens slowly as the wire i expands, and
a small quantity of gas is allowed to pass through the pipe m to the main burner B.
As soon as the gas flowing to the main burner has been lighted by the flame of the
igniting burner z, the wire i will be further heated and the opening of the valve f
will be completed. The now strong suction action set up at the mouth of the
nozzle s prevents the passage of gas into the chamber t and gas-supply pipe n so
that the supply of gas to the igniting burner ceases and the igniting flame is ex-

page_text: tinguished without any shutting off device being required on the gas-supply pipe
of the igniting burner.
A simplified construction can be employed when the device is used with an
incandescent gas-light burner. The nozzle usually arranged in the mixing tube D
of the incandescent gas-light burner (see Figure 2) is replaced by a nozzle corre-
sponding to the nozzle s above described with reference to Figure 1. If the valve f
be made sufficiently large as shewn in this figure, it will answer perfectly if the
nozzle s simply opens into an expanded chamber » from which the gas-supply pipe n
for the igniting burner extends laterally.
In some cases it may be advantageous to replace the conical valve f by a ball
valve placed in a small groove so that it can roll laterally and open the main gas
passage when the groove is inclined. The wire is arranged to operate the groove
in the same manner as it operates the valve f.
Instead of operating the lever and the valve f by a solid material which
expands under the influence of heat, fluid or gaseous substances can also be
employed which are converted into vapour or expanded by the heat of the igniting
flame and thus caused to open the valve f of the main burner. When thus em-
ploying a fluid or gaseous substance, it is arranged in a suitable vessel, such for
example as a tube Figures 3 and 4, which is mounted near the igniting and
principal flames. This tube is rigidly closed at one end, and at the other end is
closed by a membrane cr flexible diaphragm 2 or a sealing liquid for example,
quicksilver, which, during the expansion of the substance enclosed in the tube,
the shutting-off device in such a manner that the gas inlet to the main
opened as soon as the substance is expanded by the heat of the igniting
flame or of the main flame. In Figure 3 the diaphragm for example acts directly
on the shorter end of the lever band in Figure 4 a float is shewn which is suitably
connected to the said lever b. Furthermore a thermopile L Figure can be arranged
within thermal range of the igniting and main flames, the said pile by reason of
the heat of the flames generating a current which operates the shutting off device
by means of an electro-magnet k excited by the current.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what. I
claim is
1. In a self lighting gas burner, in connection with an igniting burner designed
to be extinguished whilst the main burner is alight, arranging the gas supply
pipes to the main burner and to the igniter in such a manner that the gas flowing
to the main burner, when the valve which normally closes the supply pipe has
been opened by the action of the igniting flame, creates a suction action near the
pipe to the igniting device, substantially as and for the purposes hereinbefore
described.
2. In a gas burner of the kind herein before described the arrangement of a suction
chamber in connection with the supply pipes to the main and igniting burners,
substantially as described.
B
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.