Improvements in the Manufacture of Glow-bodies for Incandescence- burners.
Year: 1898

page_text: Date of Application, 21st July, 1898
Complete Specification Left, 21st Apr., 1899-Accepted, 2nd June, 1899
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Glow-bodies for Incandescence-
burners.
I, GEORG KOHL, of VIII Bennoplatz 8 Vienna, Austria, Chemist, do hereby
declare the nature of this invention to be as follows:-
The glow-bodies or so called mantles heretofore employed for illuminating pur-
poses in incandescence or Bunsen burners, are attended by the disadvantage that
they possess little strength to withstand pressure, shock, draught or contact with
moist air or water, and are therefore very liable to be damaged both during trans-
port and whilst in use.
Now this invention relates to glow-bodies or mantles which, whilst possessing
an increased capacity for emitting light, are so strong and elastic that they will
not be easily damaged, even by impact or repeated powerful shocks, or by the
pressure exerted in handling them.
The process for the manufacture of such mantles is carried out as follows:-
First, a solution is prepared by dissolving in 1 kilogramme of water.—
2 grammes of zinc nitrate,
1.2 grammes of tin nitrate,
1 gramme of bismuth nitrate,
1 gramme of borax, and
2 grammes of calcium nitrate.
With this solution are impregnated nets or mantles produced from vegetable
fibre, preferably cotton or ramie. After being dried at a high temperature, they
are impregnated by immersion in a second solution, produced by dissolving in
1 kilogramme of water,―
400 grammes of thorium nitrate,
2 grammes of cerium nitrate (free from didymium)
0.4 gramme of barium nitrate, 3.2 grammes of strontium nitrate, 0.12
gramme of indium nitrate, 0.04 gramme of gallium nitrate, and 0.24
gramme of samarium nitrate.
The mantles prepared after this manner are again rapidly dried, and finally
glowed for the purpose of incinerating the vegetable fibre and the absorbed im-
pregnating salts.
In the glowing, of course, the salts of zinc, tin and bismuth present with the
salts of the rare earths, are also incinerated (that is to say, converted into the cor-
responding oxides), and remain behind as such, and consequently serve to increase
the mass of the skeleton of the glow-bodies under consideration, in consequence
5 of which the said skeleton constitutes a much stronger and fire-proof frame-
work than the glow-bodies heretofore known. The addition of the nitrates of
Price 811

page_text: barium, strontium, indium, gallium, and samarium to those of thorium and
cerium, has the result that the capacity of the new glow-bodies for emitting light,
is considerably increased, and is maintained constant, whilst the calcium salt which
remains behind in the form of lime after the glowing, and the borax, serve as
binding agents.
Improvements in the Manufacture of Glow-bodies for Incandescence-
burners.
I, GEORG KOHL, of VIII Bennoplatz, S Vienna, Austria, Chemist, 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 state-
ment:-
The glow-bodies or so-called mantles heretofore employed for illuminating pur-
poses in incandescence or Bunsen burners, are attended by the disadvantage that
they possess little strength to withstand pressure, shock, draught, or contact with
moist air or water, and are therefore very liable to be damaged both during trans-
port and whilst in use.
Now this invention relates to glow-bodies or mantles which, whilst possessing
an increased capacity for emitting light, are so strong and elastic that they will
not be easily damaged, even by impact or repeated powerful shocks, or by the
pressure exerted in handling them.
The process for the manufacture of such mantles is carried out as follows:.
First, a solution is prepared by dissolving in 1 kilogramme of water,-
2 grammes of zinc nitrate,
1.2 grammes of tin nitrate,
1 gramme of bismuth nitrate,
1 gramme of borax, and
2 grammes of calcium nitrate.
With this solution are impregnated nets or mantles produced from vegetable
fibre, preferably cotton or ramie. After being dried at a high temperature, they
are impregnated by immersion in a second solution, produced by dissolving in
1 kilogramme of water,
400 grammes of thorium nitrate,
2 grammes of cerium nitrate (free from didymium)
0.4 gramme of barium nitrate, 3.2 grammes of strontium nitrate, 0.12
gramme of indium nitrate, 0.04 gramme of gallium nitrate, and 0.24
gramme of samarium nitrate.
The mantles prepared afier this manner are again rapidly dried, and finally
glowed for the purpose of incinerating the vegetable fibre and the absorbed im-
pregnating salts.
In the glowing, of course, the salts of zinc, tin and bismuth present with the
salts of the rare earths, are also incinerated (that is to say, converted into the cor-
responding oxides), and remain behind as such, and consequently serve to increase
the mass of the skeleton of the glow-bodies under consideration, in consequence

page_text: of which the said skeleton constitutes a much stronger and more fire-proof frame-
work than the glow-bodies heretofore known. The addition of the nitrates of
barium, strontium, indium, gallium, and samarium to those of thorium and
cerium, has the result that the capacity of the new glow-bodies for emitting light,
is considerably increased, and is maintained constant, whilst the calcium salt which
remains behind in the form of lime after the glowing, and the borax, serve as
binding agents.
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
1. The manufacture of durable and elastic glow-bodies of great illuminating-
power, for incandescence-burners by impregnating a suitable fabric with a solution
of nitrates of zinc, tin, bismuth, calcium, and an addition of borax, then drying
the fabric, then impregnating it with a solution of nitrates of thorium, ceriumi
free from didymium, barium, strontium, indium, gallium, and samarium, in the
proportions stated, and glowing the fabric thus impregnated as set forth.
2. Glow-bodies capable of withstanding impact, shocks, and pressure, and possess-
ing a high capacity of emitting light, manufactured according to the process
referred to in the preceding claim.
f A 1900
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.