Improvements in Mantles for Incandescent Gas Lighting.
Year: 1898

page_text: Date of Application, 12th Dec., 1898
Complete Specification Left, 25th Aug., 1899-Accepted, 28th Oct., 1899
PROVISIONAL SPECIFICATION.
Improvements in Mantles for Incandescent Gas Lighting.
We, FRÉDÉRIC MISSIRE and MARIE LOUISE MISSIRE, née Marie Louise Magnin,
Inventors, both of 7, Avenue St. Quen, Paris, France, do hereby declare the
nature of this invention to be as follows:-
The present invention relates to a new description of shell or mantle for appli-
cation to incandescent gas burners for lighting purposes, an important feature
in which is the fixing upon wires formed from precious metals, of certain salts
of rare earths, in such a manner that these salts form a body with these wires and
that their bulk or mass appears in the form of tubes surrounding these latter.
These shells or mantles are constructed as follows: a wire of precious metal,
such as iridium, rhodium, ruthenium, osmium, gold, and preferably platinum
which is the most ductile, is coated with a lighting salt of any description, that
is to say, with the nitrates of rare earths such as thorium, cerium, didymium,
lanthanum, zirconium, yttrium, these nitrates being combined between themselves
or not so combined; this coating is made by means of a dissolution or in any
other suitable manner.
This nitrate is fixed upon the wire by the heat of a Bunsen flame; the oxyde
of the rare earths is formed, adheres to the wire, hardens, and becomes absolutely
embodied with it, constituting a kind of tube having variable thicknesses and
of an unequal and rough surface, surrounding the metal wire.
As regards the application of the wires thus covered, they may be arranged in
the form of fringes, applied to Bunsen burners suitably constructed; they may
be so arranged that they will form the generative part of a cylinder, being in this
case bound at the two bases or ends of the cylinder by two metal rings; they may
be formed into cones or frustums of cones, and interweavings of all sorts can be
made with them.
In order to fix the salts upon the metal wires, instead of employing the heat
of a Bunsen burner, that of a current of electricity which is passed through the
wires may be used.
Improvements in Mantles for Incandescent Gas Lighting.
We, FRÉDÉRIC MISSIRE and MARIE LOUISE MISSIRE, née Marie Louise Magnin,
both of 7, Avenue St. Ouen, Paris, France, Manufacturers, 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: -
The present invention relates to a new kind of mantles for incandescent gas
burners, the object being to provide mantles composed of threads made of
precious metals and upon which are fixed certain salts of rare earth, so that said
[Price 8d1

page_text: salts form part or said threads and are in the shape of sman
the same.
ՆԱԵ слепени
In order that this our invention may be the more readily understood and carried
into effect or practice, reference is hereby made to the accompanying drawings,
showing some forms of mantles.
Fig. 1 shows a series of threads coated with salts and arranged in the shape
of a fringe.
Fig. 2 shows coated threads forming a tube or sleeve.
Fig. 3 shows coated threads forming a cone.
Fig. 4 shows woven threads.
The improved mantles are produced as follows:-Threads of precious metals
such as iridium, palladium, rhodium, ruthenium, osmium, gold and preferably
platinum are coated with salt adapted to become incandescent, i.e. with the
nitrates or acetates of rare earths such as thorium, cerium, didymium, lanthanum,
zirconium, yttrium, etc., said nitrates being combined or not. The coating may
be applied by means of a solution or in any other suitable way. The nitrate or
acetate is fixed upon the threads by the action of a Bunsen flame, whereby oxide
of the rare earth is produced, said oxide adheres to the threads, hardens and forms
part of the same and constitutes a kind of tubes of varying thickness and having
irregular rough surface; within said oxide the threads act as a condenser, or a
conveyor of oxygen to the coating tube.
In order to employ said threads coated with oxides of rare earth for producing
incandescent light, the same may be arranged in the shape of a fringe (Fig. 1)
and secured over a certain length to be submitted to the action of a Bunsen
flame. In order to obtain a more rational application of said threads they may
be arranged to form cylinders (Fig. 2), or cones (Fig. 3) or the like, or said
threads may be woven to form a mantle of any preferred shape (Fig. 4).
Instead of employing the action of a Bunsen flame to fix the above named
salts upon the threads, the latter may be raised to incandescence by the action
of electric currents after coating the same with salts.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:
--
1. New or improved mantles for incandescent gas-burners, composed of
threads made of precious metals and coated with salts adapted to become incandes-
cent, said salts being fixed upon the threads by any suitable means, and the
threads being arranged in any preferred shape, substantially as set forth.
2. New or improved mantles for incandescent gas-burners, composed of
threads coated with the salts or nitrates of rare earth such as:-thorium, cerium,
didymium, lanthanum, zirconium, yttrium, said salts or nitrates being fixed upon
the threads by the action of a Bunsen-flame, substantially as and for the purpose
set forth.
3. New or improved mantles for incandescent gas-burners, composed of
threads coated with the salts or nitrates of rare earth such as: thorium, cerium,
didymium, lanthanum, zirconium, yttrium, said salts or nitrates being fixed upon
the threads by the action of electric currents passed through the threads, sub-
stantially as and for the purpose set forth.
4. New or improved mantles for incandescent gas-burners, composed threads
coated with the salts or acetates of rare earth such as thorium, cerium,
didymium, lanthanum, zirconium, yttrium, said salts or acetates being fixed upon
the threads in any suitable way, substantially as and for the purpose.
Dated this 95th day of trust 1800
J. P. BAYLY,
18, Fulham Place, London, W., Agent for the Applicants.

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