An Improved Process for the Production of Incandescence Bodies for Lighting Purposes.
Year: 1899

page_text: Date of Application. 18th Sept., 1899
Complete Specification Left. 18th June, 1900-Accepted, 21st July, 1900
PROVISIONAL SPECIFICATION.
An Improved Process for the Production of Incandescence Bodies for
Lighting Purposes.
I, ROBERT NORDMANN, of Calmeyergaden 6, Christiania, in the Kingdom of
Norway, Gentleman, do hereby declare the nature of this invention to be as
follows:-
-
My present invention relates to an improved process for the production of
incandescence bodies.
According to my invention, the incandescence body, made of suitable material
for the purpose, is prepared for use by subjecting it to intense heat alone with-
out a direct flame, instead of, as heretofore, subjecting it to the action of gas,
a blow-pipe flame or the like.
After the material intended for use as an incandescence body has been
impregnated with ingredients proper for subsequent incandescence, and dried,
it is suspended on a peg, cone or the like, made of material capable of with-
standing the heat and of a diameter corresponding approximately to that of the
burner upon which the incandescence body is to be subsequently used. Whilst
thus suspended, it-is placed in a furnace or oven, preferably a muffle-furnace, in
such a way that the material does not come into contact with any direct flames.
After the operation just described, the furnace is closed, and, by means of
external firing, the material is heated to a temperature of about 1500 degrees C.
Thus, by the action of the continuous and gradually increasing heat of the
furnace, the material of which the incandescence body is composed is charred
and oxydized, and the oxide is toughened to a sufficient extent, to render it
suitable for use. After being thus heated for several hours, and the furnace
having been allowed to cool, the said body is removed.
Before being subjected to the heat of the furnace, the material is considerably
wider than the aforesaid peg, cone or the like; but, through the action of the
heat, it is caused to assume the shape of the aforesaid peg, cone or the like, and
an incandescence body of the best possible form is produced.
By this system of producing incandescence bodies, by gradual heating and
cooling, the said incandescence bodies are not only prepared with the greatest
ease and safety of any desired form or shape, but their symmetry, durability
and illuminating power are increased.
Thatod this 18th dox of Sentember 1899

page_text: COMPLETE SPECIFICATION.
An Improved Process for the Production of Incandescence Bodies for
Lighting Purposes.
I, ROBERT NORDMANN, of Calmeyergaden 6, Christiania, in the Kingdom of
Norway, Gentleman, 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:-
According to this invention, the incandescence body made of suitable material
for the purpose,
prepared for use by subjecting it to intense heat alone with-
out a direct flame, instead of, as heretofore, subjecting it to the action of gas,
a blow pipe flame or the like.
After the material intended for use as an incandescence body has been
impregnated with ingredients proper for subsequent incandescence and dried,
it is suspended on a peg, cone or the like, made of a material capable of with-
standing the heat and of a diameter corresponding approximately to that of the
burner upon which the incandescence body is to be subsequently used. Whilst
thus suspended it is placed in a furnace, preferably a muffle-furnace, in
such a way that the material does not come into contact with any direct flames.
After the operation just described, the furnace is closed, and by means of
external firing, the material is heated to a temperature of about 1500 degrees C.
Thus by the action of the continuous and gradually increasing heat of the
furnace, the material of which the incandescence body is composed is charred
and oxydized, and the oxide is toughened to a sufficient extent to render it
suitable for use. After being thus heated for several hours and the furnace
having been allowed to cool, the said body is removed.
Before being subjected to the heat of the furnace, the material is considerably
wider than the aforesaid peg, cone or the like; but through the action of the
heat, it is caused to assume the shape of the aforesaid peg cone or the like, and
an incandescence body of the best possible form is produced.
By this system of producing incandescence bodies, by gradual heating and
cooling, the said incandescence bodies are not only prepared with the greatest
ease and safety of any desired form or shape, but their symmetry, durability
and illuminating power are increased.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The process of producing incandescence bodies, substantially as and for the
purpose set forth.
2. In the production of incandescence. bodies, subjecting such bodies to infense
heat alone, without a direct flame, for the purposes set forth.
3. In the production of incandescence bodies, gradually heating and cooling
same in a furnace in such a way that such bodies do not come into contact with
any direct flames for the purposes set forth.
Dated this 18th day of June 1900.
BROWNE & Co.,
Agents for the Applicant,
9, Warwick Court, Gray's Inn, London, W.C.