Improvements in or relating to Incandescence Bodies suitable for Use with Gas and like Burners.
Year: 1899

page_text: Date of Application, 21st Dec., 1899
Complete Specification Left, 22nd Sept., 1900-Accepted, 8th Dec., 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Incandescence Bodies suitable for Use
with Gas and like Burners.
We, JOHN HENRY HILL DUNCAN, Chartered Accountant, and THE NEW
SUNLIGHT INCANDESCENT COMPANY, LIMITED, both of 39, Coleman Street, in the
City of London, do hereby declare the nature of this invention to be as follows:-
This invention relates to the composition of the earthy portion of filaments
or threads that constitute or are made into mantles or other shaped incandescence
bodies for use with gas or other flames, the said filaments or threads, or some
of them, being suitable for use as the source of ruddy light in incandescence
bodies of the kind described in the Specification of another application for
Letters Patent dated 30 March 1899 No. 6919 and filed by me and others,
according to which, variously tinted light emitting bodies are associated in such
a manner that the selectively emitted varying colours or tints of light combine
to produce an effect more pleasing to the eye or better suited to the purpose in
view.
The radiant earths employed as this source of ruddy light are the oxides of
aluminium, chromium and thorium. These substances are
or may be added
to a solution of combustible matter, it may be collodion when the said collodion
is to serve as a vehicle for carrying the said oxides, preferably as solutions of
the nitrates of aluminium and thorium, and of chromic acid, in a solvent of the
hereinbefore mentioned combustible matter.
When the incandescence bodies are to be produced by an impregnation
process, the nitrates and chromic acid may be dissolved in water, alcohol or
other solvent in which the fabrics or mantle bodies are to be dipped.
According to this invention the said substances are added in such proportions
to the solution of combustible matter or impregnating solution that the resulting
threads, filaments, or mantle bodies before burning off, will contain the said
oxides in approximately the following relative proportions, viz. :-
Alumina
:-
-
from about 48 to 60%

page_text: ordinary or non-composite kind, produced by the impregnation process, with
the aforesaid substances in about the following proportions, viz.:-
48%
Alumina
COMPLETE SPECIFICATION.
Improvements in or relating to Incandescence Bodies suitable for Use
with Gas and like Burners.
We, JOHN HENRY HILL DUNCAN, Chartered Accountant, and THE NEW
SUNLIGHT INCANDESCENT COMPANY, LIMITED, both of 39, Coleman Street, in the
City of London, 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 the composition of the earthy portion of filaments
or threads that constitute or are made into mantles or other shaped incandescence
bodies for use with gas or other flames, the said filaments or threads, or some
of them being suitable for use as the source of ruddy light in incandescence
bodies of the composite kind described in the Specification of Letters Patent
dated 30 March 1899, No. 6919, according to which, variously tinted light
emitting bodies are associated in such a manner that the selectively emitted
varying colours or tints of light combine to produce an effect more pleasing to
the eye or better suited to the purpose in view, than is the case when any one
of the said bodies is used separately.
The radiant earths heretofore employed as this source of ruddy light are the
oxides of aluminium, chromium and thorium. These substances are or may be
added as heretofore, to a solution of combustible matter, it may be collodion when
the said collodion is to serve as a vehicle for carrying the said oxides, prefer-
ably as solutions of the nitrates of aluminium and thorium, and of chromic acid,
in a solvent of the hereinbefore mentioned combustible matter.
When the incandescence bodies are to be produced by an impregnation process,
the nitrates and chromic acid may, as heretofore, be dissolved in water, alcohol
or other solvent in which the fabrics or mantle bodies are to be dipped.
According to this invention the said substances are added in such proportions
to the solution of combustible matter, or to the impregnating solution, that
the resulting filaments, threads, or mantle bodies before burning off, will contain
the said oxides in approximately the following relative proportions, viz.:-
Alumina
from huet 10 COL

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that
what we claim is:-
1. In the manufacture of incandescence bodies composed of alumina, chromic
oxide and thoria and suitable for use with gas and like burners, adding the
said substances in suitable form in such proportions to the combustible matter
from which the incandescence threads, filaments or mantle bodies are to be made,
or to the impregnating solution with which the threads, filaments or mantle
bodies are to be impregnated, that the resulting threads, filaments or mantle
bodies will, previous to burning off, contain the said substances in approxi-
mately the following relative proportions, viz., alumina from about 48% to 60%;
chromic oxide from about 5% to 10%, and thoria from about 42% to 35%, as
set forth.
2. An incandescence body suitable for use with gas or like burners and com-
posed of or containing threads or filaments made of alumina, chromic oxide and
thoria in or about the proportion of 60% alumina, 5% chromic oxide; and
35% thoria, as set forth."
3. An incandescence body suitable for use with gas or like burners and com-
posed of threads or filaments made of alumina, chromic oxide and thoria in or
about the proportions of 48% alumina, 10% chromic oxide, and 42% thoria,
as set forth.
4. An incandescence body suitable for use with gas or like burners and com-
posed of threads or filaments made of alumina, chromic oxide and thoria in
or about the proportions of 53% alumina, 5% chromic oxide, and 42% thoria,
as set forth.
Dated this 19th day of September 1900.
For the Applicants,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Chartered Patent Agent.