Improvements in Glass Lamp-chimneys.
Year: 1897

page_text: Date of Application, 26th Aug., 1897-Accepted, 2nd Oct., 1897
COMPLETE SPECIFICATION.
Improvements in Glass Lamp-chimneys.
A Communication to me from CARL GÜNTHER, of 63 Pionierstrasse, Stettin, in
the Empire of Germany, Merchant
I. EDMUND EDWARDS, of the Firm of Edwards and Co., Patent Agents..and
Engineers, of 65 and 66 Chancery Lane, in the County of Middlesex, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement and accompanying drawing, that is to say:
In order to prevent the breaking of glass lamp chimneys, their lower part has
sometimes been made of separate rod shaped bars fitted together whilst their
upper part has been made of a single hollow cylinder. In this mode of con-
struction, the section of the glass rods forming the lower part of the chimney has
been made circular, the rods being either solid or hollow. But-in glass chimneys
of this kind there is the serious objection that too great refraction of the light
takes place, which causes inconvenience to persons near.
The present invention has for its object the avoiding of this objection, flat or
slightly rounded glass strips being used instead of some of the round glass rods.
Or, if desired the whole may be formed of glass strips.
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A
2:
The invention further consists of novel methods of connecting together and
fixing the separate parts of the lower part of the chimney, in such manner that
the usual cement is not necessary. In this way the breaking of the glass rods or
strips is prevented, whilst their changing when necessary is facilitated.
The accompanying drawing is in illustration of the invention
Figure 1 is a longitudinal axial section through the glass chimney. Figure 2
is a transverse section through the lower part of the same. Figure 3 is a vertical
section through the ring which connects together the upper and lower, parts of
the chimney. Figure 4 shews a similar section through the ring which holds
together the lower ends of the rods and strips of glass. Figure 5 shews a vertical
section through a supplementary ring, in the arrangement shewn in Figure 1.
Figure 6 shews a modification of the lower ring shewn in Figure 4. Figures 7
and 8 shew in vertical and horizontal section respectively a modification of the
supplementary ring shewn in Figure 5.
Figures 9 and 10 shew in vertical section further modifications of the lower ring
shewn in Figure 6.
Figures 11 and 12 shew in transverse section modifications of the glass chimney,
the lower part of which is composed entirely of separate glass strips.
In the arrangement shewn in Figures 1 and 2 glass strips are used alternately
with glass rods b. These glass rods 6 may be (as already mentioned) either solid
or hollow, and they may also be grooved or fluted round their circumference.
In the arrangement shewn these glass rods b are arranged in groups of three,
and between these groups are arranged the slightly curved glass strips a, having
their longitudinal edges rounded. In this form of arrangement the lower ends
of the rods 6 and the strips a are held together by a ring c, which as shewn in

page_text: Figure 4 is provided with a recess c'. By means of cement an intimate connection
between this ring and the rods may be effected.
This cementing-in may also be made use of in the centre ring d, when the
latter has the form shewn in Figure 3. Or. a ring of the shape shown in Figure 5
may be inserted in the centre ring d, as shewn in Figure 1. This ring e is pro-
vided with spring tongues e¹ directed outward, the tongues being of little width,
so that each acts upon a single rod, or at least upon a very small number of the
latter.
In this way the rods or strips can be separately removed when required.
It is however also possible to render the use of cement in the lower ring unneces-
sary, if a ring such as is shewn in Figure 6 is used, which has a number of
tongues c¹ directed upward and outward. and pressing against the glass rods and
strips.
Instead of the supplementary ring e (Figure 5) the modified ring E, Figures
and 8, may be used which has spring tongues E cut and projecting horizontally
instead of vertically.
The springs in the lower ring C may be made in somewhat similar manner,
as illustrated in Figures 9 and 10 the springs C2 projecting outward and being
either horizontal as shewn in Figure 9 or inclined as shewn in Figure 10, so that
they press against the glass rods or the strips a.
Figure 11 shews a transverse section through a lamp chimney the lower part
of which is composed entirely of glass strips a abutting against each other whilst
Figure 12 shews a similar arrangement but having the edges of the glass strips a²
rounded.
Having now particularly described and ascertained the nature of the said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A glass chimney, having its lower part formed of separate vertical parts
these parts being either flat or rounded strips a¹ or a² Figures 11 and 12, or alter-
nately of such strips a, Figure 2, and rods b circular in section, or groups of such
rods; substantially as and for the purpose described and illustrated.
2. In glass chimneys, of the kinds described in Claim 1, the lower ring C,
Figure 6, Figure 9, or Figure 10, having spring tongues directed outward, sub-
stantially as and for the purpose described and illustrated.
3. In glass chimneys, in combination with the central ring & Figures 1 and 5,
the supplementary ring e having spring tongues el directed outward, substantially
as and for the purpose described and illustrated.
Dated this 26th day of August 1897.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.