IMPROVEMENTS IN THE MANUFACTURE OF CARBON FOR ELECTRIC LAMPS AND OTHER ELECTRICAL APPARATUS
Year: 1885

page_text: Cal Apparatus,
I JAMES YATE JOHNSON of 47 Lincoln's Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN THE MANUFACTURE OF CARBON FOR ELECTRIC LAMPS AND OTHER ELECTRICAL
APPARATUS," which Invention has been communicated to me from abroad by
La Société A. Chertemps & Cie of Paris in the Republic of France to be as
follows:-
According to this Invention fluoride of baron and its derivatives are employed
for dehydrating organic matter containing the elements of water in chemical
combination with the object of obtaining carbon suitable for use in the construction
of electrical apparatus and in the manufacture of incandescent electric lamps in
particular.
:
The said organic matter being reduced to a filamentary or other desired form by.
any suitable means is exposed to the action of fluoride of baron (B FI³) or its:
derivatives with or without the simultaneous application of heat. After this.
treatment the material is exposed to the action of an elevated temperature (obtained.
by an electric current or otherwise) in a space deprived of air and oxygen in order
to remove the excess of fluoride of, baron and the combinations that may have,
been formed therewith. The carbon thus prepared is then impregnated with a
carburet of hydrogen such as sugar, glucose or analogous substances containing the
elements of water (Cm H* On) in the state of combination and the operations.
hereinbefore described consisting in exposure to the actions of fluoride of baron
and of an elevated temperature are repeated until the carbon has acquired the
desired degree of density and conducting capacity...

page_text: and other Electrical Apparatus.
I JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this Invention which has been
communicated to me from abroad by La Société A. Chertemps & Cie of Paris in
the Republic of France and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :—
According to this Invention fluoride of boron and its derivatives are employed
for dehydrating organic matter containing the elements of water in chemical
combination with the object of obtaining carbon suitable for use in the construction
of electrical apparatus and in the manufacture of incandescent electric lamps in
particular.
The said organic matter being reduced to a filamentary or other desired form by
any suitable or known process or means is exposed to the action of fluoride of
boron (B. F 3) or its derivatives The desired reaction takes place with or without
the simultaneous application of heat and under ordinary conditions it is not
necessary to raise the temperature during this action-After this treatment the
material is exposed to the action of an elevated temperature (being at the same
time protected from contact with atmospheric air or oxygen) in order to eliminate
the excess of fluoride of boron and the combinations that may have been formed
therewith The elevated temperature required for this operation may be produced
by a furnace an electric current or by any other suitable means-The carbon thus
prepared is then impregnated with a carburet of hydrogen such as sugar, glucose
or analogous substances containing the elements of water in the state of combination
and the operations herein before described consisting in exposure to the actions of
fluoride of boron and of an elevated temperature are repeated until the carbon has
acquired the desired degree of density and conducting capacity.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
The improvements in the manufacture of carbons for electrical purposes consisting
in treating organic materials containing the elements of water with fluoride of
boron or its derivatives substantially as herein before described.