Improvements in or relating to Igniting Devices for Gas Burners.
Year: 1896

page_text: Date of Application, 7th Mar., 1896
Complete Specification Left, 4th Sept., 1896-Accepted, 7th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in or relating to Igniting Devices for Gas Burners.
I, ALEXANDER SCHWARZSCHILD, of No. 58 Zeil Frankfurt on the Main in
the Empire of Germany, do hereby declare the nature of this invention to be as
follows:-
It is well known that the igniting of incandescent gas lamps or burners presents
difficulties when such lamps or burners are arranged in a high position or in places
where access to the top opening of the chimney is not readily obtainable.
To obviate these difficulties it has been attempted to effect the ignition by means
of a platinum wire which is either brought to incandescence by self-ignition with
the aid of platinum-sponge, or by electricity and which incandescent wire will then
ignite the gas jet leaving the burner.
These igniting-devices however present the disadvantage that the platinum wire,
which in order to serve for the purpose in question must be made very thin, is
broken and rendered useless after a comparatively short time.
I have observed that this rapid decay of the igniting platinum bridge is solely
due to mechanical causes or influences, in so far as the thin platinum wire brought
to incandescence is unable to permanently resist the continuous impact of the gas
against it and is thus soon ruptured.
Based on this observation I provide the igniting platinum bridge with a mantle
or cover of wire net work, or perforated sheet metal or the like. But as the
incandescent platinum wire would not ignite the gas, if the same were completely
enclosed in the net work or perforated mantle or cover, the said wire is left open at
one or more places, none of which latter however must lie immediately opposite
the gas jet passing out of the burner. The ignition takes place readily through
the open places in the mantle or cover, without the platinum bridge or wire proper
being exposed to the direct impact from the gas jet to be ignited, and without
consequently being injured thereby. The passage of the jet toward the igniting
platinum bridge offers no technical difficulties.
Dated this 7th day of March-1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in or relating to Igniting Devices for Gas Burners.
1, ALEXANDER SCHWARZSCHILD, of No. 58 Zeil Frankfurt on the Main in
the Empire of Germany, 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:-
It is well known that the igniting of incandescent gas lamps or burners presents
difficulties when such lamps or burners are arranged in a high position or in places
where access to the top opening of the chimney is not readily obtainable.
To obviate these difficulties it has been attempted to effect the ignition by means

page_text: of a platinum wire which is either brought to incandescence by self-ignition with
the aid of platinumn-sponge, or by electricity and which incandescent wire will then
ignite the gas jet leaving the burner.
These iguiting-devices however present the disadvantage that the platinum wire,
which in order to serve for the purpose in question must be made very thin is
broken and rendered useless after a comparatively short time.
I have observed that this rapid decay of the igniting platinum bridge is solely
due to mechanical causes or influences, in so far as the thin platinum wire brought
to incandescence is unable to permanently resist the continuous impact of the gas
against it and is thus soon ruptured.
Based on this observation I provide the igniting platinum bridge with a shield
or mantle or cover of wire net work, or perforated sheet metal or the like. But as
the incandescent platinum wire would not ignite the gas, if the same were
completely enclosed in the network or perforated mantle or cover, the said wire is
left open at one or more places, none of which latter however must lie immediately
opposite the gas jet passing out of the burner. The ignition takes place readily
through the open places in the mantle or cover without the platinum bridge or wire
proper being exposed to the direct impact froin the gas jet to be ignited, and with-
out consequently being injured thereby. The passage of the jet toward' the igniting
platinum bridge offers no technical difficulties.
The accompanying drawing shows by way of example two constructional forms
of this improved igniting device.
According to Figure 1 of the said drawing the igniting device is arranged on
a wire frame, which is attached to the lamp glass or chimney. The platinum
spiral p is surrounded by the mantle or cover a of wire netting which is open at x;
(see dotted lines).
According to Figure 2 the igniting device is suspended from the top edge of the
chimney so as to hang in the interior of the latter. In this case the platinum
wire p is not surrounded by a mantle but has merely a flat shield a a¹ of wire
netting arranged at its top and bottom, whilst' its sides are unprotected all round.
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 :-
Igniting devices for gas lamps or burners, in which the igniting platinum spiral
or wire is protected against the direct impact resulting from the discharged jet of
gas, by means of a shield, open cover, or mantle of wire gauze, perforated sheet
metal or the like.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.