Year: 1888

page_text: Date of Application, 31st Jan., 1888
Complete Specification Left, 31st Oct., 1888
Complete Specification Accepted, 7th Dec.. 1888
We, CARL HERMANN KREISSIG, OTTOMAR HARTIG and OTTOMAR SEIM, Gentlemen,
in the town of Grüna, in the Kingdom of Saxony and German Empire do hereby
declare the nature of this invention to be as follows:-
It is well known, that the flame from a source of light, for instance a gas burner,
can be greatly increased by placing a transparent ring of an oval section and of a
material adopted for breaking the light, in front of the middle of the flame.
The difficulty however to obtain such rings-which always have been of cast glass
and therefore not of such a pure and transparent quality as required-has up to
the present prevented this arrangements from being carried out in a practical
manner.
Our invention has for object to overcome these difficulties and for such a purpose,
we propose to use a ring of glass, or any other suitable material, made in two different
pieces, one having a convex and the other a concave surface, seen from outside, and
both having an oval form and joined together by any suitable means.
The ring is
filled with water or a transparent liquor.
LORENTZ ALBERT GROTH,
3, Tokenhouse Buildings, E.C.,
Agent to the Applicants.

page_text: We CARL HERMANN KREISSIG, OTTOMAR HARTIG, and OTTOMAR SEIM of Griina, in
the Kingdom of Saxony Empire of Germany Manufacturers, 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
It is known that a transparent ring of oval cross section made from refracting
material considerably increases the lighting power of a flame burning in its centre ;
useful rings of this kind however have not heretofore been produced. As solid rings
of the required thickness can only be obtained by casting, they do not posses the
purity, and smoothness of surface indispensable therefor. This inconvenience has
been sought to be obviated by making the rings hollow, and filling them with refracting
liquid. This idea has been patented in various forms of application but could not
hitherto be rendered practically useful as also these rings even with the most careful
treatment could not be given the uniformity required for attaining the intended
purpose.
The present improvement, illustrated by the accompanying drawing, consists in the
application of rings composed of a concave and a convex part a and b. Figs. 2 and 3
so connected in any suitable manner at their upper and lower surfaces as to prevent
the liquid filled in between them through the aperture t or in any other suitable way
from Howing out.
This connection of the two parts is represented in the drawing as effected by means
of a conveniently profiled metal ring dor d' respectively Figs. 1, 4 and 5 brought in
watertight connection with the rims of the glass.
For lamps in an elevated position preferably the construction shown by Figs. 5. 6
and 7. is adopted, in which the ring or annular lens reflects the light downwardly.
The parts a Figs. 6. and 7 are placed into each other as illustrated in Fig. 5, and
held together by means of a U shaped ring d.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
A hollow glass ring or annular lens consisting of a concave and a convex part
which parts are adapted to be so connected at the top and bottom as to prevent the
refracting liquid filled into the space comprised between the two parts from flowing
out, for the purpose of increasing the lighting power of a flame burning in the centre
of said ring or lens substantially as set forth.
Dated this 21st day of October 1888