Improvements in Lamp Chimneys.
Year: 1894

page_text: Date of Application, 19th Feb., 1894
Complete Specification Left, 8th Nov., 1894-Accepted. 29th Dec., 1894
TRUVIDIUNAL SPECIFICATION.
Improvements in Lamp Chimneys.
I, EDUARD ZIETZ, of 1 Brandstwiete No. 14, in the City of Hamburg, Germany,
Merchant, do hereby declare the nature of this invention to be as follows:-
:―
My invention relates to an improved lamp chimney, particularly applicable to
incandescent gas burners, to be composed of two parts, the upper part being made
of glass, as usual, while the lower part surrounding the flame is formed of wire
or other transparent but incombustible material, thus affording facilities for the
proper cleaning of that part of the chimney which is chiefly exposed to the
blackening of the flame, while the other (lower) part of the chimney surrounding
the flame is allowed to remain on the burner, in order to constantly assist the
draft and protect the flame against irregular burning. At its upper and lower ends
the lower part is strengthened by metal rings and both rings are joined to each
other by two or more metal ties. The upper ring is designed to be received by
the ordinary gallery of the lamp-burner or it may itself serve as a gallery; the
upper ring however is adapted to receive the upper glass tube so as to hold the
same in proper position.
In certain cases particularly when employing Auer's incandescent gas light, I
am accustomed to provide within the ring at the upper end of the lower part of
the chimney a wire gauze the meshes of which being of such width, that coarse
dust, particles, as well as splinters occurring on the bursting of the glass tube, are
kept from the burner, thus protecting the sensitive incandescent fabric employed
with Auer's gas light from being prematurely destroyed by accident.
Dated this 19th day of February 1894.
PHILLIPS & LEIGH,
Agents for the Applicant.
Capimneys.
1, EDUARD ZIETZ of 1 Brandstwiete No 14 in the City of Hamburg, Germany,
Merchant, do hereby declare the nature of my invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to improvements in lamp chimneys, more especially to
such as are used on lamps the lighting agent of which is an incandescent body,
such as for instance, the well known Auer lamp. The object of the invention is
to facilitate the cleaning of that portion of the chimney which is the most exposed
to obscuration by smoke.
I attain the said object by making the chimney in two portions or sections.
The lower section, that is the one which surrounds the flame or the incandescent
body, as the case may be, is made of mica or other equivalent transparent and
refractory material. The upper section is made of glass.
A further part of my invention relates to means for preventing such damage to
the frequently fragile incandescents of Auer and other lamps of the same class, as
[Price 8d1

page_text: might be caused by the settling of dust upon them or the falling upon them of
particles of a fractured glass section.
The accompanying drawing is a sectional elevation of a lamp chimney made
according to the present invention.
In practice I, preferably, construct the two sections of the chimney in the form
of cylinders, the lower cylinder a being made of mica, or equivalent transparent
refractory material, secured at its lower end in a metallic ring that is U shaped in
section so as to form a binding for the said lower end, the ring e being adapted to
fit the gallery of the lamp burner; or the said ring c may be rivetted to an
encompassing sleeve c' which fits the gallery. The upper end of the mica cylinder a
is similarly confined in the groove of a U shaped metallic ring d whose inner
vertical member is provided with a circular ledge or seat d' at its edge, forming
a seat for the lower end of the upper cylindrical section 6 of the lamp chimney,
which section, as stated, is made of glass.
In order to strengthen the lower section a of the lamp chimney and adapt it to
support the weight of the glass section, I connect the binding rings c and d by
means of flat metal struts e rivetted to the said rings and to the cylinder a at
different points of its length. One of the said struts may also serve to hold the
meeting edges of the material.
It is well known that the incandescents employed in lamp burners are very fragile
and also somewhat expensive. By surrounding them with a material that is capable
of resisting the heat generated about the zone of incandescence without danger of
breaking, and that cannot be shivered by an accidental blow, the incandescent is
thoroughly protected. In order to protect the same against injury by the accidental
breaking of the glass section of the lamp chimney, I interpose between the two
chimney sections, a shield or guard of some suitable non-combustible and reticulated
or foraminous material, such as a wire gauze diaphragm f, which may be secured
to the ledge d' of the ring d or simply interposed between the said flange and the
lower edge of the glass section b so that ready access may be had to the mica
cylinder.
By this means, should the section 6 break or be broken from any cause, the
diaphragm will prevent access of pieces of glass to the incandescent. On the other
hand, the glass section can be removed without injuriously affecting the source of
light, since the lower section a will still act as a chimney and also protect the flame
against irregular burning.
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 :-
1. A lamp chimney composed of two sections, the one immediately surrounding
the source of light being made of transparent refractory material, such as mica,
and provided at its upper end with a ledge or seat, the other section being made
of glass detachably seated on the said ledge or seat, substantially as and for the
purpose set forth.
2. A lamp chimney composed of two sections, the one immediately surrounding
the source of light being made of transparent refractory material as mica, and
provided at its upper end with a ledge or seat, the other section being made of
glass detachably seated on the said ledge or seat, in combination with a reticulated
or foraminous refractory diaphragm interposed between the ends of said sections,
substantially as and for the purpose set forth.
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.