Device for the Adjustment of an Inner Chimney within the Outer Chimney of Lamps.
Year: 1894

page_text: Date of Application, 15th Dec., 1894-Accepted, 11th May, 1895
COMPLETE SPECIFICATION.
Device for the Adjustment of an Inner Chimney within the Outer
Chimney of Lamps.
I, ROBERT CAMPE of Seydelstrasse, Berlin, in the German Empire, Manu-
facturer, 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 :-
This invention relates to devices of the kind referred to in my former Patent
Specification No. 10488 of 1894, which may be employed for holding an inner
chimney within an outer chimney, either to increase the supply of hot air heated
by passing between the two chimneys, or to protect the glow body of incandescent.
gas lamps against injury through fracture of the outer main chimney or to protect
the latter against fracture, the inner protecting chimney in these two latter cases
being preferably of mica or other refractory transparent material.
The object of the invention is to provide an improved device of the kind and
for the purpose referred to.
In the drawing Figs. 1 and 2 are respectively a vertical section on line w-w
of Fig. 2 and a horizontal section on line u-u of Fig. 1 of my former device of
Specification No. 10488 which is now shewn with a view to explain more completely
the present improvements. It consists of an inner plain ring c and of an outer
ring d preferably of a corrugated form both rings being of brass' or other suitable
material and connected together by bridges or strips e. The inner chimney b is
inserted between the rings c, d, and rests on the strips e. d' are flat bent springs
projecting outwards from the outer ring d and bearing against the inner surface
of the outer main chimney a so as to be fixable by friction at any desired height
when inserted in the chimney a. In a similar way the chimney b is held by
friction between the waves of the ring d and the ring c. Instead of ring d the
ring c or both rings may have a corrugated form.
Figs. 3 to 27 are' similar sectional views but shewing the improvements of this
invention.
Figs. 3 and 4 shew a device or holder in which the outer ring d has a plain
surface and the space between the rings c, d, is enlarged so as to allow of applying
the same device or holder to chimneys of different sizes as left hand of Figs. 3
and 4 and right hand side thereof. For the same reason the inner ring c may
be provided with projecting springs c¹, as shewn on the right hand side of Figs. 3
and 4, to secure by friction chimneys 6' of different sizes. Instead of the strips e,
there may be inserted plates or a cylindrical strip between the rings c, d to keep
them at the desired distance from one another and to support the inner chimney.
In the modifications of the device shewn in Figs. 5 to 27 the ring c or the ring d
is dispensed with.
In Figs. 5 to 9 the inner ring c is dispensed with. The ring d has outwardly
projecting springs d' as before described and on the inside is provided with a
narrow projecting strip or shoulder 9 (Fig. 5) or with inwardly projecting
supports d², (Figs. 7, 8, 9, 16, 17, 18) for supporting the chimney b. Fig. 9 is a
vertical section of Fig. 8 on line -x. In this modification the ring d may also.
have spring parts cut and bulged out so that it will elastically embrace the
chimney b and hold it by friction, the supports thus being superfluous.
In Figs. 16, 17, the springs consist of strips projecting upwards from the
ring d and bent into the desired form. In Figs. 14, 15, the springs c' extend

page_text: upwards from the bottom of the inner ring c whilst in Figs. 1 to 7 and in
Fig. 18, 19, 23, 25, 26, 27, the springs d' are formed of strips cut out of the
ring d.
In Figs. 10 to 15 the outer ring d is omitted. In Figs. 11 to 15 the ring c is
held in place by springs c'. In Figs. 11, 12, the chimney is supported by
supports projecting outwards from the ring c, or it may rest directly on the
springs c¹, (Figs. 13, 14, 15) conveniently bent for this purpose. In Fig. 15 the
spring c is of a double curved form so as to secure by friction the device or holder
in the chimney a and the chimney b in the holder.
In Fig. 10 a projecting narrow strip g is provided at the outer edge of the
ringe for supporting the chimney b said strip having springs g¹ attached to it.
In Figs. 18 to 24 in which the inner ring c is dispensed with, the ring dis
provided either with outwardly projecting springs or with inwardly projecting
springs d or with both (Figs. 23, 24). By these means the chimney 6 is secured
by friction in the device or holder in a similar manner as the latter in the
chimney a, and supports for the chimney in the holder may be dispensed with as
shewn in Figs. 19, 20 which are vertical sections of Fig. 18 on lines y-y and z-ž,
and in Figs. 22, 24. In this modification the holder may be attached to the lower
end of the chimney b, as in Figs. 19, 20, or to the upper end as in Fig. 22 or to
the middle thereof as in Fig. 24, also supports d³, may be combined with said
modification as shewn in Fig. 21 which is a vertical section on line -v of Fig. 18.
If the substance of which the chimney b is made, mica for instance, should not be
strong enough to withstand the pressure of springs da resistance ring (Figs. 22, 23)
may be inserted into the inner chimney 6 opposite to the springs d³ to receive the
thrust of the latter. The ring h may be cut through so as to press elastically
outwards against the inner surface of the chimney 6 and thus be held in place by
friction.
In Figs. 25 to 27 the device or holder consists of the ring d held in place in
the chimney a by springs d¹ as before described and of a separate ring k attached
to the inside (Fig. 25) or to the outside (Figs. 26, 27) of the chimney 6 and
provided with projections k. By these means the chimney 6 is hung on to the
ring d and supported by the projections overlapping said ring, which may be
cut through and thus hold by elasticity and friction, and a resistance ring / may be
applied to the inside of the chimney 6 (Fig. 27) or to the outside if the ring k is
attached to the inside. However in this modification the ring & may be dispensed
with and the projections k¹ enlarged so as to overlap the upper edge of the
chimney a itself, chimney 6 thus being hung on directly to chimney a and supported
by the projections k¹.
It is obvious that the device or holder may be permanently connected to the
chimney if the removal of the latter is not required.
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 device for the adjustment of an inner chimney within the outer chimney of
lamps, consisting of an inner ring c and an outer ring d provided with projecting
springs d' and ineans for concentrically connecting both rings and keeping them
apart from each other, substantially as described and shewn.
2. A device for the purpose referred to consisting of an inner ringe and an
outer ring d, both provided with projecting springs c and d¹ respectively, an.l
means for concentrically connecting both rings and keeping them apart substantially
as described and shewn.
3. A device for the purpose referred to, consisting of an outer ring d provided
with projecting springs d' on the outside, substantially as described and shewn.
4. A device for the purpose referred to, consisting of an outer ring d provided
with projecting springs d' on the outside and means inside thereof for supporting
a chimney, substantially as described and shewn.

page_text: 5. A device of the kind referred to cousisting of an outer ring d, preferably cut
through, and provided with projecting springs d' on the outside, substantially as
described and shewn.
6. A device for the purpose referred to, consisting of an inner ring e provided
with projecting springs c' on the outside, substantially as described and shewn.
7. A device for the purpose referred to, consisting of an inner ring c provided
on the outside with projecting springs c¹ and means for supporting a chimney,
substantially as described and shewn.
8. A device for the purpose referred to, consisting of an outer ring d provided
with outwardly projecting springs d' and inwardly projecting springs d³, substantially
as described and shewn.
9. A device for the purpose referred to consisting of an outer ring d provided
with outwardly projecting springs d' and inwardly projecting springs d³ and means
inside for supporting a chimney, substantially as described and shewn.
10. In a device for the purpose referred to, the combination of an outer ring d
provided with outwardly projecting springs d' and inwardly projecting springs d²
and a resistance ring placed in the lamp chimney, substantially as described and
shewn.
h
11. In a device for the purpose referred to the combination of an outer ring d
provided with projecting springs d' and a ring k having projections and attached
to the inside or outside of a chimney, substantially as described and shewn.
12. In a device for the purpose referred to, the combination of an outer ring d
provided with projecting springs d', a ring k having projections and attached
to the inside or outside of a chimney, and a resistance ring attached to the
outside or inside of the chimney opposite the ring k, substantially as described and
shewn.
Dated this 15th day of December 1894.
THOMAS R. SHILLITO,
89, Chancery Lane, London, W.C., Agent for the Applicant.