Manufacture of Insulating Material for Electrical Purposes.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Manufacture of Insulating Material for Electrical Purposes.
I
I, CLAYTON BEADLE, of West Street, Erith, in the County of Kent, Analytical
and Consulting Chemist, do hereby declare the nature of this invention to be as
follows:-
66
66
33.
When cellulose is treated with alkali and dissolved in carbon disulphide the
resulting liquid, which has acquired the name viscose, on evaporation of the
solvent, becomes a solid known as viscoid," which can be employed as an insu-
lating material for electrical purposes. My invention relates to a treatment of
viscose in such a way as to improve the insulating quality of the resulting
solid, and to render the product considerably cheaper than the viscoid" above
referred to.
65
For this purpose I intimately mix with the "viscose" bituminous matter such
as tar, pitch dissolved in coal tar, or pitch itself, or other bituminous substances
melted and mixed with heated "viscose." I may also employ bituminous coal
finely pulverised and mixed with the "viscose" by active agitation. The mixture
of viscose with the bituminous matter when solidified by evaporation of the
solvent, constitutes a material of a highly insulating character, and as a con-
siderable proportion of it consists of cheap bituminous substances, it can be pro-
duced at moderate expense.
"
ABEL & IMRAY,
Agents for the Applicant.
Manufacture of Insulating Material for Electrical Purposes.
I, CLAYTON BEADLE, of West Street, Erith, in the County of Kent, Analytical
and Consulting Chemist, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
When cellulose is treated with alkali and dissolved in carbon disulphide the
"viscose,"
resulting liquid, which has acquired the name
on evaporation of the
solvent, becomes a solid known as "viscoid," which can be employed as an insu-
lating material for electrical purposes. My invention relates to a treatment of
"viscose" in such a way as to improve the insulating quality of the resulting
solid, and to render the products considerably cheaper than the "viscoid" above
noferred to

page_text: 66
.For this purpose I intimately mix with the "viscose" bituminous matter such
as tar, pitch dissolved in coal tar, or pitch itself, or other bituminous substances
melted and mixed with heated "viscose." I may also employ bituminous coal
finely pulverised and mixed with the viscose" by active agitation. The mixture
of viscose" with the bituminous matter when solidified by evaporation of the
solvent, constitutes a material of a highly insulating character, and as a con-
siderable proportion of it consists of cheap bituminous substances, it can be pro-
duced at moderate expense.
"
.1
The cellulose and bituminous matter can be mixed in equal proportions but I
do not limit myself to the above proportions as in some cases I have found a
material suitable for certain purposes can be made with as little as 5 to 7 per
cent. cellulose or as much as 95 per cent. cellulose.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the is to be performed, I declare that what
I claim is:-
An insulating material consisting of "viscose" having bituminous matter com-
pounded with it, substantially as described.