New or Improved Means for Protecting the Metallic Coating of Telegraph Cables from Corrosion.
Year: 1889

page_text: Date of Application, 23rd Dec., 1889
Complete Specification Left, 22nd Sept., 1990-Accepted, 15th Nov., 1890
PROVISIONAL SPECIFICATION.
New or Improved Means for Protecting the Metallic Coating of
Telegraph Cables from Corrosion.
I JOSEPH ARTHUR LOVEL DEARLOVE of 4 Great Winchester Street, in the City of
London, Electrical Engineer, do hereby declare the nature of the said invention to be
as follows:-
This invention more specially relates to new or improved means for protecting from
corrosion, the thin narrow tape like strips of metal which are wound round the cores
of telegraph cables, in order to protect the same from the destructive action of the
Teredo and other marine insects, but it is also applicable for the protection of the
outer sheathing of telegraph cables.
It is well known that the above mentioned metallic strips, which are usually made
of Muntz metal, are liable to corrosion by the action of sea water and to be thereby
rendered useless for the purpose they are intended to fulfil. Various means of
preserving these strips from such corrosive action have been from time to time
suggested and tried but so far as I am aware with little, or no practical success. The
object of my present invention, is to produce more effective means of preserving these
strips of metal, than have heretofore been employed. For this purpose, I coat the
metallic strip with what is known as anti sulphuric enamel, or other suitable enamel,
varnish or adhesive protecting material, by passing the said strip through a bath of
the material removing the surplus by means of suitable brushes or doctors and I
then dry the protecting material on the strip by passing the latter when coated, as
above described, through a steam jacketed cylinder or other heated chamber.
:
"
By these means the metallic strip is covered with a thin coat of enamel, or
varnish, which is not acted on by sea water, and which is perfectly flexible, so that
when the strip is wound round the core of the cable in the usual way, the protecting
coating does not crack and is sufficiently strong to resist any mechanical abrasion
to which it may necessarily be subjected.
Dated this 23rd day of December 1889
COMPLETE SPECIFICATION.
New or Improved Means for Protecting the Metallic Coating of
Telegraph Cables from Corrosion.
I, JOSEPH ARTHUR LOVEL DEARLOVE, of 4 Great Winchester Street, in the City
of London, Electrical Engineer, do hereby declare the nature of the said invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, that is to say :-
This invention relates more specially to new or improved means for protecting from
corrosion the thin narrow tape-like strip of metal which is wound round the cores of
telegraph cables in order to protect the same from the destructive action of the
Teredo, and other marine insects, but it is also applicable for the protection of the
outer sheathing of telegraph cables.
It is well known that the above mentioned metallic strip, which is usually made of
Muntz metal, is liable to corrosion by the action of sca-water, and to be thereby
rendered useless for the purpose it is intended to fulfil. Various means of preserving
this strip from such corrosive action have been from time to time suggested and
ried; but, so far as I am aware, with imperfect success.
The object of my present
TD 17

page_text: invention is to produce more effective means of preserving this strip of metal than
have heretofore been employed. For this purpose I coat the metallic strip with what
is known as anti-sulphuric enamel, or other suitable enamel, varnish, or adhesive
protecting material, by passing the said strip through a bath of the material, removing
the surplus by means of suitable brushes or "doctors," and I then dry the protecting
material on the strip by passing the latter, when coated as above described, through
a steam-jacketted cylinder, or other heated chamber preferably placed vertically, so
that the coated tape may pass up inside thereof from the aforesaid bath, without
coming in contact with the sides of such heated chamber, or with anything else until
the coating is sufficiently dry to allow of the tape being wound on a reel, or passed
over a guide roller placed at the top of such heated chamber. The outer sheathing
of telegraphic cables may be treated in the same way.
By these means the metallic strip, or sheathing, as the case may be, is covered
with a thin coat of enamel, or varnish, which is not acted on by sea water, and which
is perfectly flexible, so that when the strip is wound round the core of the cable, or
the sheathing round the complete cable in the usual way, the protecting coating does
not crack and is sufficiently strong to resist any mechanical abrasion to which it may
ordinarily be subjected.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First Coating the tape-like strip of metal intended to be wound round the core of
a telegraph cable, with enamel or varnish which is flexible and is not acted on by
sea-water substantially as hereinbefore described, and for the purpose specified.
Second-Coating the outer sheathing of a telegraph cable with enamel or varnish
which is flexible and is not acted on by sea-water, substantially as hereinbefore
described, and for the purpose specified.
Dated this 22nd September 1890