Improvements in Conductors for the Distribution of Electrical Energy.
Year: 1892

page_text: Date of Application, 7th June, 1892-Accepted, 9th July, 1892
COMPLETE SPECIFICATION.
Improvements in Conductors for the Distribution of Electrical
Energy.
I CHARLES EDWARD JACKSON of 13 Revere Street, Jamaica Plain, Boston,
in the State of Massachusetts, United States of America, Electrician 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:-
This invention has for its object to provide an improved metallic circuit or
conductor for the distribution of electrical energy.
In accordance with this invention, a metallic conducting wire is covered with one
or more layers of insulation about which are wound spirally, two preferably flat
conducting strips, one of which is wound over and to cover the spaces between the
spiral turns of the other strip, the whole being preferably covered with an insulating
substance.
One part of the invention therefore, consists in the combination with an insulated
conductor, of two metal strips wound spirally about the same, one of the said strips
being wound over and upon and to cover the space between the turns of the other
of said strips, the successive convolutions of each strip being separated, substan-
tially as will be described.
The drawing represents a conductor embodying this. invention.
A represents a conductor, covered with one or more layers or windings of
insulation b, b, about which is wound spirally the strip c.
A second strip d is wound spirally over and upon the said strip c, and to cover
the space 5, between the successive spiral windings or turns of the said strip c, so
that a current of electricity sent over the strip c, will not be compelled to follow
the spiral turns thereof, which necessarily increase the resistance, but may pass
from one turn to the other through the outer stripd, and thus pass in a substantially
direct or straight line along the conductor.
An outer coating of insulation e, is also preferably provided as shewn.
If the outer coating of insulation e, should be injured or destroyed at any point
by reason of the conductor chafing against a building or tree, the insulation b,
which separates the inner conductor A, from the outer strips c, d, will still be
preserved from injury by the overlapping windings of the said outer strips, which
effectually exclude all air and moisture from the insulation beneath.
Should it not be desired to utilize the spirally wound strips c, d, as conductors,
they may be employed with advantage as a flexible metallic armour for the
conductor A, to protect the latter and to prevent abrasion to which insulated
conductors are subject, and to this end the said armour strips are adapted for use
in connection with underground and sub-marine cables and the like.
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 :-
In a conductor for the distribution of electrical energy :-' -The combination with
an insulated conductor, of two metallic strips wound spirally about the same, one
of the said strips being wound over and upon, and to cover the space between the

page_text: turns of the other of said strips, the successive convolutions of each strip being
separated, substantially as described.
Dated the 4th day of June 1892.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.