An Improved Chimney or Globe for Incandescent Gas LightingTMTM Apparatus.
Year: 1897

page_text: Date of Application, 23rd Mar., 1897-Accepted, 1st May, 1897
An Improved Chimney or Globe for Incandescent Gas Lighting™™
Apparatus.
+
A, communication by HERMANN ARNHOLD, of 46 Wasserthorstrasse, Berlin, in the
Empire of Germany.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.ME., of The Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster, 118 New Street, Birmingham in
the County of Warwick, and 322 High Holborn in the County of Middlesex,
Civil Engineer, 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 :-
With the impetus given to gas lighting since the invention of the incandescent
gas light, experiments for simplifying the same have been correspondingly proceeded
with. In the first place the utilization of the incandescent gaslight with the
cylindrical chimneys hitherto employed is rendered considerably more expensive, as.
the so called stamped cylinders, which in themselves do not surpass in quality
ordinary cylinders, cost more without their boasted unbreakability being maintained..
That an illumination or lighting with these cylinders becomes in time very
expensive is easily seen, and it is therefore a great advance if an actually good.
cylinder can be obtained. This can only be obtained by a suitable and practical
shape being given to the chimney or globe whilst material compositions will lead.
to no result.
This invention has for its object a chimney or globe formed on this principle
which combines cylinder and globe and which in consequence of its shape avoids
any flying apart. A further advantage is attained by the same that by the
combination of globe and cylinder the whole arrangement for incandescent
lighting is made considerably easier whilst the weight on the gas galiery etc. is.
reduced to a minimum.
The above sought for object is attained as is shown in the accompanying drawing
by the globe A being contracted at the bottom at the part d into the form of a
cylinder in such a way that the globular extension c only commences at half the
height of the incandescent mantle e. An advantage which must not be under-
estimated is thus attained for the reason that in this manner the flame is held
together so that it does not lose any illuminating power. In order further to.
increase the illuminating power the chimney assumes the globular form gradually.
The result of this is a strong circulation of the atmospheric air and the heating
gases so that the latter with a suitable form of the upper extension a, which is
attached to the part 6 of the globe which may be forined as a reflector, are easily
carried upwards. Any danger of the globe bursting is thereby prevented.
If the light is however to be reflected downwards, as for instance in the lighting
of offices or the like, a form is selected in which the reflecting part can exert.
greater superficial action.
Advantages are also attained by the present invention which as regards the
duration of burning of the mantle are of extraordinary extent; more particularly
as by the shape of the chimney or globe, the mantles are more strongly maintained.

page_text: whilst as frequently observed the mantles in ordinary cylinders very rapidly
collapse. The mantle by this invention is ito a certain extent inflated whereby the
illuminating flame gains in strength.
Having now, particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is,―
1. A chimney globe for incandescent gas lighting for the purpose of dispensing
with a separate cylinder, characterised by the same being gradually contracted
below into a cylindrical extension (d) so that its cylindrical part extends precisely
up to half the height of the mantle and the upper part (c) gradually rises into a
globe shape, substantially as described.
2. A chimney or globe for incandescent gas lighting of the kind described,
characterised by the globe (A) being shaped at the top into a reflector (b) which
according to the kind or use of the globe may exert a greater or lesser superficial
action, substantially as described.
Dated this 22nd day of March 1897