Improvements in Electric Lighting and Extinguishing Devices for Gas Lamps.
Year: 1894

page_text: Date of Application, 1st Sept., 1894-Accepted, 13th Oct., 1894
COMPLETE
SPECIFICATION.
Improvements in Electric Lighting and Extinguishing Devices for
Gas Lamps.
I, SIEGBERT BRUCK of Lenné Strasse 6*, Berlin, in the German Empire,
Merchant 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 :-
In electric lighting devices for gas lamps which operate by the gas cock being
opened and closed by an electro magnet and by the contact at the burner outlet
being repeatedly interrupted to produce an igniting spark, it has hitherto been
necessary to intercalate an induction roller (self induction, extra current) in the
electric circuit. It is true that in the two electro magnet bobbins of these devices
an induction current (extra current) is generated but this is too weak for the ignition
of illuminating gas because the windings of the two electro magnet bobbins employed,
cannot all act inductively upon one another and further because the mass of iron in
the electro magnet is very small.
The intercalation of a special induction roller is in the present invention super-
seded by the provision of a peculiar electro magnet, an important diminution and
simplification of the apparatus as well as a concentric arrangement around the gas
supply tube being at the same obtained.
In the drawing
Fig. 1 is a vertical section of the device without the magnet armature and the
plug of the gas cock.
Fig. 2 is a front view of the device.
Figs. 3 and 4 respectively a top and a sectional view of the armature plate.
a is a toothed wheel serving in its rotation to close and open the cock, the
teeth being arranged to correspond with ways in the plug so as to alternately
open and close the cock. The wheel is moved round by pawls b, b', in such a
way that upon each attraction of the armature P by the electro magnet, the
wheel is turned to the extent of one tooth and therewith also the cock plug to
which the wheel is attached, thus closing or opening the cock.
The current breaking arrangement for producing the igniting spark consists of
an angular stud or contact piece k carried and guided in the periphery of the
iron ring F and normally held depressed by a spring f. Upon the attraction of
the armature P by the electro magnet, the stud k is pressed upwards, rising away
from the part c which is in connection with the current and thus producing the
igniting spark in consequence of the interruption of the contact.
The bi-polar electro magnet is of a hollow form. A part E of soft iron of the
gas tube itself, forms the one magnet core and has at A its enlarged pole. Upon
this core is placed the wire bobbin D (Fig. 1). The second electro magnet core
is formed by the iron ring F slid over the bobbin D and in connection with
the inner core through the flat top G. The currents crossing in the wire bobbin
act upon the iron ring but in a manner opposite to that on the inner core so
that at the whole of the bottom edge B the opposite pole is originated from A,
and therefore this electro magnet acts upon a corresponding armature in the
same way as a horse shoe magnet. The armature plate P (Fig. 2) is by means
of a link suspended from the bottom edge of the iron ring F and is provided
with an aperture or slot to take over the toothed wheel a and thereby lessen
the height of the apparatus.
Now, owing to the described form of the electro-magnet there is firstly obtained
the improvement that the whole of the windings of the electro magnet are

page_text: located upon one bobbin, all of which consequently act inductively upon one
another, and that the iron mass of the electro-magnet is considerably increased,
above all by the iron ring F. The inductive action of the alternating magnetism
on the wire windings is much increased. This magnet induction in all induction
apparatus surpasses by far the induction through the cross currents in the bobbins
and thus the small apparatus generates for itself sufficiently strong induction
currents for the ignition of the gas.
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
1 claim is
In electric lighting and extinguishing devices for gas lamps simultaneously
with the electro magnetic operation of the gas co ', the concentric arrangement
of a hollow bi-polar electro magnet of large iron contents and with only one
bobbin, under utilisation of a part of the gas supply pipe as an inner electro
magnet core, so that the electro magnet generates induction currents sufficiently
strong for the ignition of illuminating gas and at the same time renders the
interposition of an induction roller superfluous, substantially as described and
shewn.
Dated this 31st day of August 1894.
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C.. Agents for the Applicant.