Automatic Igniting Device for Gas Lamps or Lanterns.
Year: 1897

page_text: Date of Application, 19th Aug., 1897--Accepted, 25th Sept., 1897
COMPLETE SPECIFICATION.
Automatic Igniting Device for Gas Lamps or Lanterns.
I, CARL FRIEDRICH NEBENDAHL, of No. 54 Langestrasse, Wandsbeck, near
Hamburg in the Province Schleswig-Holstein of the Kingdom of Prussia, German
Empire, Retired Municipal Architect, do hereby declare the nature of this inven
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement: ---
The present invention is an automatic igniting device for gas lanterns, to be
actuated by a Hoat which sets the lamp in and out of action as soon as the
pressure of the gas dispatched from the main increases or decreases by having
closes off the
a pendulum or bell crank valve acted upon in such a manner that
channel of the igniting tube when the pressure of the gas is increased after
having opened the feeding channel of the lighting Hame and after the latter has
been ignited by the igniting flame and that it (the bell crank valve) closes off
the feeding channel of the lighting flame whenever the pressure of the gas is
reduced, after having opened the igniting channel and produced the igniting
flame. It is presumed for this invention that the difference in the height of
pressure amounts at least to 5 millimeters. The admission of higher differences
of pressure is unlimited and in such cases a reduction during the operation of
the lamp is of no consequence. The operation of the new apparatus remains the
same at all degrees of pressure; the apparatus is adjusted by the weight of the float
in such manner that the lighting flame disappears and the igniting Hame appears
The equivalent of one millimeter gas pressure
during the day-pressure of the gas.
is 2 grammes. If, for instance, it is intended to extinguish at a certain time, at
a day-pressure of 20 millimeters, a certain number of lamps and to have another
certain number of lamps left burning, the weight on the floating body of the
igniting device will have to be increased to the extent of 10 grammes and the
pressure must increase at least from 20 to 30 millimeters. It is obvious that
these lamps will only start burning after the pressure has risen to 30 millimeters
and that they will become extinguished if the pressure decreases to 25 millimeters.
A greater difference in the pressure ensures the igniting device to be more reliable
and indifferent to and not affected by, variation of pressure and vibration or
shaking.
The invention by way of illustration is shown in the annexed drawing in one
of the forms most suited for practical use.
Figure 1 is a vertical section through an automatic igniting device arranged
according to the invention.
Figure 2 is a section on line 1-2 of Figure 1.
Figure 3 is a perspective plan illustrating the connection of the floating bell
with the lever valve.
A tube 6 branches off from the tube a the latter leading to the burner B¹ and
to the lighting flame respectively, which (b) ends with a tube 6¹ in a casing c
filled with glycerine or other liquid. A floating bell d is arranged in a casing c the
weight of which is reduced as far as necessary by virtue of a cork ring d¹ or the
like which helps to buoy it up. The floating bell which is immersed in the liquid

page_text: is so arranged over the tube 61 that the gas therefrom will lift the floating bell
more or less according to the pressure of the gas.
9.
which
The floating body d is connected to the spindle f of the lever valve
is arranged in the chamber a2 by means of a rod e, rail or the like, whereby the
parts e, f, g form a bell crank. The chamber a is connected to the gas-feeding
tube a by means of a tube a¹. Adjustable channels h and i which are screwed
to the chamber jacket or adjustably arranged in any other suitable manner, lead
to the burner tube B and to the igniting tube or igniting channel, Z respectively.
If the floating bell falls the lever g presses against the channel h, but if the
floating bell rises the lever g presses against the channel i in order to shut off in
both cases the feeding of gas to the burner tube B and the igniting channel Z
respectively. The lift or rise of the bell is therefore limited by the lever g, the
turn of the latter being determined and regulated by the adjustment of the channels
h and i. The gas-tight connection between the lever g.and the channels h and i
is obtained by a packing substance arranged in the lever, for instance, lead-g' against
which the channels and are pressed to prevent an-
escape of gas which
would cause the lamp to be ignited; in cases of removed counter-pressure, i:e.,
when the immersion of the floating bell d does not correspond to the pressure, a
suitable valve 62 is arranged upon the tube the body 6 of which would shut
of the gas outlet 65 automatically in such cases. A suitable, protection cap ci
forms the d on top of the casing for the floating bell., kare small weights
placed around a spindle 2 of the floating bell d in order to govern the weight of
the bell according to the gas, pressure..
2
To render the fighting flame indifferent to, and unaffected by variation in
pressure and vibration and to enable the apparatus to turn the lever-seat even in
very small differences of pressure, the pressure conduit leading to the floating
body, which actuates the shutting off valve device, is separated from the conduit
leading to the flame, and energy and movement are suitably adjusted by means
of a bell crank according to the requirements and the dimensions of the lamp.
Supposing a floating bell has been weighted for a certain pressure, the, shut-off
cocks a³ and 63 being opened and the bell crank valve e, f,g being in the position
shown in Figure 1, then the channel feeding the flame will be closed conse-
quently the gas is flowing through the opened channel and the igniting tube Z
to the igniting flame. If it is now intended to ignite the, lamp or the lighting
flame respectively, it will only be necessary to increase the pressure of the gas.
The floating bell will be lifted because of the increased pressure and the bell-
crank valve will shut off the channel i after it has opened the channel leading
to the lighting flame and after this latter has been ignited by the igniting flame.
When the gas pressure is again reduced, the floating bell d and the bell-crank
valve go back into the position illustrated in Figure 1, whereby the feeding
channel for the lighting flame will be shut off after the igniting channel has
been opened and after the igniting flame has been ignited. The lamp is then
again extinguished and only the igniting flame will be burning.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is
1. In automatic igniting devices for gas-lamps or lanterns actuated by means
of a floating body the combination of the said float with a suitable bell crank
valve in such a manner that the latter shuts off the igniting channel when the gas
pressure is increased, after it has opened the feeding channel for the lighting
flame and ignited the latter, and shuts off the feeding channel for the lighting
flame, after having opened the igniting channel and ignited the igniting flame,
when the gas pressure is reduced, substantially in the manner herein described
and set forth.
2. In combination with automatic igniting devices for gas lamps as characterised
in Claim 1 hereof, the arrangement of adjustable gas feeding channels h and i

page_text: forming the seat of the bell-crank valve, which channels control and limit the
movements of the bell crank valve and the lift of the floating bell and effect a gas
proof closing, substantially in the manner herein described and shown.
Dated the 19th day of August 1807
PHILLIPS & LEIGH,
No. 22 Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.