Improvements in Lamp Glasses and Devices connected therewith for Incandescence Gas and Petroleum Lamps.
Year: 1895

page_text: Date of Application, 8th Mar., 1895-Accepted, 27th Apr., 1895
COMPLETE SPECIFICATION.
Improvements in Lamp Glasses and Devices connected therewith for
Incandescence Gas and Petroleum Lamps.
I, MAX ARENDT of 3 and 4 Kleinstrasse, Berlin, Germany, 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:
My invention relates to a construction of glasses for incandescence gas and
petroleum lamps whereby this is divided into two separate parts in order at the same
time to serve as support for the incandescence mantle, and this do away with
the usual separate support rising from the burner required for the mantle, which
support in absorbing a considerable amount of the heat produced by the gas,
reduces the light-producing power of the mantle to a corresponding extent.
Furthermore, the introduction and removal of the incandescence mantle is facilitated
by constructing the lamp glass of two separate parts, the upper part being secured
to the lower part by a metal gallery or other suitable connecting device which
may in conjunction with the lower part of the glass, also serve to support the
mantle.
The accompanying drawing shews at Figs. 1 to 7, by way of example several
different constructions for carrying out my invention.
Figs. 1 and 2 shew respectively a vertical and cross section of one arrangement,
Figs. 3 and 4 similar views of another arrangement,
Fig. 5 a sectional elevation of a third construction, Fig. 6 a similar view of a
modification of Fig. 5,
Fig. 7 a separate view of the lower glass,
Figs. 8 and 9 are sections of two modifications of the gallery and
Figs. 10 to 14 various modifications of the supporting bar for the mantle.
As above stated, the cylinder is divided into a lower part a and an upper part b,
which are connected together by a double gallery c, having two opposite sets of
spring fingers de of which the lower ones d embrace the upper end of the lower
glass a while the upper ones e embrace the lower end of the upper glass b. In the
arrangements at Figs. 1 to 4 the double gallery is furthermore provided with an
inward directed flat ring f, which, in Figs. 1 and 2, has two holes g for the reception
of the ends of the support h for the incandescence mantle A, while in Fig. 3 the
support does not fit into holes inf but rests with its ends in notches or grooves i i
thereof as at Fig. 4.
For insuring the central position of the mantle A on the support h, this is
formed with a bend at the middle, constituting a seat k for the head of the
mantle.
The mantle-support h can be variously constructed as shewn at Figs. 10 to 14,
according as it is intended to be supported by the gallery or by the lower glass.
In the construction at Figs. 1 and 2 the two ends of the support h are bent
downward as at Fig. 10 in order to fit into the holes g as above described; or, as
shewn at Fig. 11, it can be bent down at one end only, and the ring f be provided
at one side with a hole g for the reception of that end, and at the other side with a
recess for the reception of the other end. Lastly, the support for the mantle can
consist of an arm o fixed at one end to the ring f of the gallery and extending to
the centre only, where it is made of a hook-shape for receiving the mantle head,
the hook being then closed by a second arm m pivotted to the other side of the
ring, as shewn in dotted lines Figs. 12 and 13.

page_text: In all these arrangements, as also that of Fig. 3, where the support h is straight
at both ends, as shewn at Fig. 14, the lower glass serves indirectly as support of
the mantle. The glass may however be made to directly carry the support of the
mantle if, as shewn at Figs. 5 to 7 the lower glass a be provided at its upper edges
with two opposite notches n into which fit the ends of the support, the said ends
being held securely in the notches, either by the ring f of the double gallery cas
at Fig. 5, or by the lower edge of the upper glass b as at Fig. 6.
The double gallery c, if provided with a ring fas at Figs. 1, 3 and 5, may be
conveniently made of two parts, of which the one part, either dor e has its edge
bent inwards to form the ring f and bead while the other part is secured thereto
by bending its margin over the bead as shewn. When the lower glass directly
carries the support h as at Fig. 6 the double gallery can be formed of a single
piece as at Fig. 9, the ring f being dispensed with.
The lower half of the gallery is in this case slid on to the lower glass a down to
a mark on the latter, and then, after the mantle support has been fitted with its
ends in the notches of a, the upper glass b is slid into the upper part of the
gallery c while this is held by the hand so as to prevent it from sliding farther
down a.
By the use of the double gallery c with its spring fingers de the farther advantage
is gained that the lower glass a is kept perfectly clear of deposit, even when in use
for a long time, owing to the rapid transmission of heat from the lower to the
upper glass by means of the double gallery, and thus the full illuminating power of
the mantle is always transmitted.
It will be evident that the means of connection of the two glasses as also the
construction of the mantle support can be variously modified without departing
from the nature of the invention, which consists essentially in dividing the lamp
glass into an upper and a lower part so as to render it applicable either directly or
indirectly as the support for the incandescence mantle.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is :-
A lamp glass for incandescence gas and petroleum lamps which is divided
transversely into two parts, connected together by a gallery or other suitable means,
and serving either indirectly, as at Figs. 1 and 3, or directly as at Figs. 5 to 7, as
support to the incandescence mantle, whereby both the illuminating power of the
latter is increased and the fitting and removal of the mantles is facilitated.
Dated this 8th day of March 1895.
ABEL & IMRAY,
Agents for the Applicants.