A New or Improved Electrically Opened and Closed Gas Burner.
Year: 1895

page_text: Date of Application, 4th Apr., 1895
Complete Specification Left, 2nd Jan., 1896-Accepted. 15th Feb.. 1896
PROVISIONAL SPECIFICATION.
A New or Improved Electrically Opened and Closed Gas Burner.
We, ERIC GUSTAF RUDEN, and KNUT LEONARD NOREN, of Gamla Kungs-
holmsgatan 54, Stockholm, Sweden, Manufacturers do hereby declare the nature
of this invention to be as follows:-
11
The object of this invention is to provide an electrically opened and closed gas-
burner, that is simple and effective and the mechanism of which is so free in its
movements that it will not easily get out of order.
In the accompanying drawings, Figure 1 represents a longitudinal section of such
a burner, when open for the gas to flow; Figure 2 is a sectional plan on the
line 1-2 in Fig. 1; Figure 3 shows a detail, Figure 4 is the same section as that
shown in Fig. 1, but showing the burner closed. Figure 5 is a section on line 3-4
of Figure 4.
The body a of the burner which is of brass or other nonmagnetic material is in
the well known manner surrounded by a solenoid b, and provided with an inner
opening or bore, through which the gas flows to the burner proper c, which may be
a common gasburner or an incandescent gasburner or any other well known burner.
The valve d, is placed in the bore just below the burner c. Said valve may be of
any suitable nonmagnetic material and so arranged that it closes itself by its own
weight. Below the valve is a magnetic core e, which extends down between the
poles p aud n of a permanent magnet g, fixed in the bottom of the burner. One
pole p of the magnet is situated above the other and between both poles are hooks
or extensions k, which are suited to hold up the core, the length of which is such,
that when the lower end of it is near the upper pole, it keeps the valve d open, and
when near the lower pole the valve is closed.
If electric current be sent through the said solenoid b, in such direction that the
lower end of the core becomes of the same polarity as the lower pole n, the core
will be uplifted and will open the valve d, at the same time its lower end, will be
drawn towards the pole p of opposite polarity, and when the current is left off the
core will be held by the hook k in that position. The gas can now flow through
the open valve, until electric current be sent through the helix in a direction
opposite to the former. In this latter case the core will be lifted from the hook,
but will now be attracted to the lower pole n, so that when the current ceases, the
core will fall down on the hook at the lower pole and be held there.
will not now reach the valve, which by its own weight will be closed.
The core
The length of the core is so arranged that in its lower position the upper end of
the same is some distance below the valve, whereby the advantage is gained that
it will be freely lifted that distance and when it hits the valve will, by its acquired
inertia strike it forcibly.
In the same circuit with the solenoid may be the arrangement for lighting the
gas, or the lighting arrangement may be in a separate electric circuit or arranged
in any well known manner.
As the parts for this arrangement move freely and when once properly made,
need no adjustment, the burner will not easily get out of order. The valve may
be made of some material that oxidises very slowly, so that it will not stick on that

page_text: account for a long while. As the core and magnet are situated in the lower part
of the burner, they will not be beated, so as to lose their magnetic properties.
Dated this 4th day of April 1895.
HERBERT HADDAN & Co.,
Agents for Applicants.
A New or Improved Electrically Opened and Closed Gas Burner.
We ERIC GUSTAF RUDEN and KNUT LEONARD NOREN of Gamla Kungs-
holmsgatan 54, Stockholm in the Kingdom of Sweden Manufacturers, 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 hitherto used devices for electrically opening and closing gas burners, have
been based upon the principle that either the valve was made of magnetic material
or a magnetic core or armature was mechanically connected to the valve, so that
the valve opened and closed by the attraction of a solenoid and magnet, when an
electric current passed through the winding of said solenoid or magnet.
In order that the valve may close the burner effectually it is necessary that it
should wedge itself into its seat when closed which necessitates that the power for
opening the valve is greatest at the moment the valve is to be loosened from its
seat. But in the old style of devices the power for opening the valve is smallest
just when the valve is to be loosened from its seat or just when it ought to be
greatest.
The object of this invention is to provide a device in which the power for
opening the valve is largest when the valve is to be loosened or at the moment
when it needs to be greatest, whereby a smaller and more effective device is secured.
The object is also to provide a mechanism for accomplishing this result, that is so
simple and free in its movements that dirt, dust or shaking will not cause it to get
out of order.
The invention consists in having the valve made of non-magnetic material and
separated from the magnetic core which by being drawn into the solenoid presses
the valve open and in having the core made of such a length and so placed that it
moves freely a distance before it reaches the valve, in order that the core may
during its free movement acquire such a velocity that, when it hits the valve, the
momentum may be transformed into a momentary pressure against the valve,
several times stronger than the pressure that would result from the attraction of
the core alone.
For holding the core in the positions corresponding to open and closed valve, a
permanent magnet, having one pole placed nearer the solenoid than the other, is
placed below the solenoid so that an opening in which the core freely moves is
left between the poles. To catch and hold the core so that its lower end can leave
either pole without being at the same time lifted by the solenoid and repelled by
the pole in question, a hook is provided. This prevents the opening or closing of
the valve by shaking.
In the drawings filed with our Provisional Specification, Fig. 1 represents a
longitudinal section of such a device when open for the gas to flow; Fig. 2 is a
sectional plan on the line 1-2 in Fig. 1; Fig. 3 shows a detail, and Figs. 4 and 5
are the same views as those in Figs. 1 and 2, but showing the valve closed.
The body a of the burner, which is of brass or other non-magnetic material is in
the well known manner surrounded by a solenoid b, and provided with an inner
opening or bore, through which the gas flows to the burner proper c which may be
a common gas burner or an incandescent gas-burner or any other well known

page_text: Said valve
burner. The valve d is placed in the bore just below the burner c.
may be of any suitable non-magnetic material and so arranged that it closes itself
by its own weight. Below the valve is a magnetic core e which extends down
between the poles p and n of a permanent magnet g fixed in the bottom of the
burner. One pole p of the magnet is situated above the other and between both
poles is placed a non-magnetic hook & on the top of which the end of the core rests
when drawn to the upper pole, but in whose bottom it rests when drawn to the
lower pole. The end of the core is provided with a flange on the side next to the
upper pole, which flange prevents the core from being shaken off from the end of
the hook. The length of the core is such that when the lower end of it is close-
to the upper pole, it keeps the valve open, and when close to the lower pole the
valve is closed.
In the drawing the core e is shown bent like a hook and the permanent magnet
is horseshoe shaped and placed so that the opening between the poles is situated
on one side so that the hook-formed part of the core can move very freely between
the poles. Instead of this construction a straight core may be used and the
permanent magnet may be placed so that the opening between its poles is located
centrally under the bore. In this case the core will not turn but only its end be
drawn to and hooked fast near one pole or the other. Iustead of one hook like the
one shown in the drawing two hooks may be used, one extending from each pole of
the magnet and suited to catch and hold the core so that it must be lifted up to.
get free from the hook. The upper end or side of the core may also, by means of
a chain or similar device, be so connected to the valve that it may move freely
upward, but hang down from the valve when the same is closed whereby the
additional weight of the core will help to keep the valve harder closed.
If electric current be sent through the said solenoid in such direction that the
lower end of the core becomes of the same polarity as the lower pole n, the core.
will be uplifted and will open the valve d, at the same time its lower end will
be drawn towards the pole p of opposite polarity, and. when the current ceases
the core will be held by the hook k in that position. The gas can now flow
through the open valve until electric current be sent through the coil in a direction
opposite to the former. In this latter case the core will be lifted from the hook,
but will now be attracted to the lower pole n so that when the current ceases, the
core will fall down in the hook at the lower pole and be held there. The core.
will not now reach the valve which by its own weight or together with the weight
of the core, will be closed.
The length of the core is so arranged that in its lower position the upper end
of the same is some distance below the valve, whereby the advantage is gained
that it will be freely lifted that distance and when it hits the valve, will by its
acquired momentum, strike it a hard blow, so that the valve is thereby loosened
from its seat.
For lighting the gas any suitable arrangement may be used. I prefer to use a
small platinum wire whose one end is fixed to a tube like conductor which is
adjustably fixed to but insulated from the burner, so that the platinum wire can be
adjusted close to the upper end of the burner. The other end of the platinum
wire is fixed to another conductor which a little distance below the platinum is
surrounded with insulation and tightly passes in and through the said tube. The
object of this construction is, that, when the distance between the platinum wire
and the burner is to be regulated, as sometimes needed, both conductors may be
simultaneously moved, without the straining and breaking of the fragile platinum
wire, which would otherwise take place. The platinum wire is preferably connected
in series with the solenoid b.
As the parts for this arrangement move freely and, when once properly made,
need no adjustment, the burner will not easily get out of order. The valve may
be made of any material that oxidises very slowly, so that it will not stick on that
account for a long while. As the core and magnet are situated in the lower part
of the burner they will not be heated enough to lose their magnetic properties

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. In an electric gas-burner the magnetic core separated from the valve and
situated a short distance below the same, when the valve is closed, substantially as
and for the purpose set forth.
2. In an electric gas-burner, the combination with a non-magnetic valve that
opens by being lifted from its seat, but closes by gravitation, of the core of a solenoid
situated below the valve and free to move a short distance without lifting or pulling
the same so that, when the core is drawn into the solenoid, it will first move freely
and acquire momentum and thereafter strike the valve open by the momentum
being transformed into a strong momentary pressure against the underside of the
valve, substantially as described.
3. The combination with an electric gas burner of a permanent magnet situated
below the magnetic core with one pole so far above the other as the core moves,
when the valve is to be opened, and a suitable hook for holding the lower end of
the core close to either pole, when the magnetic core is not lifted by means of the
solenoid or magnet, substantially as and for the purpose set forth.
4. In an electric gas-burner one pole of a permanent magnet situated above the
other below a solenoid with room for the end of the solenoid core to move from
one pole to the other, and means for holding the end of said core close to either
pole when no current traverses the winding of said solenoid, substantially as
described.
Dated this 2nd day of January 1896
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., Agents to the Applicants.