Improvements relating to Electrical Conductors and Insulating Conduits therefor.
Year: 1888

page_text: Improvements relating to Electrical Conductors and Insulating
Conduits therefor.
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co. Patent Agents,
Southampton Buildings in the County of Middlesex 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 :-
My invention relates to improvements in single-line electrical conductors and
insulating conduits, and consists of the novel construction and combination of parts
hereinafter described and pointed out in the claims.
Fig. 1 of the drawings is a plan view of a section of my improved conductor and
conduit.
Fig. 2 is a longitudinal central section of same.
Fig. 3 is an end view viewed from the left, showing the tapped end of the conductor.
Fig. 4 is a view of the opposite end.
Similar letters refer to similar parts throughout the several views.
I have heretofore enclosed a plurality of electrical conductors within an insulating
conduit for carrying the conductors underground and made the conductors and
inclosing conduit in sections, with differing means for connecting the sections, as
described in a prior application for a United States patent.
The object of my present invention is to provide in sections, which can be easily
and quickly connected, a single line conductor having an insulating conduit.
Each section is made up of a tube A-electrical conductor B-and insulating
material C.
The tube may be made of any material, though metal tubing is preferred on account
of its strength and cheapness.
°
The conductor may be made of any of the materials known as conductors of
electricity, though metallic wire is preferred, on account of its strength and cheapness,
and small resistance to the passage of electrical currents.

page_text: The shape and position of that part of the conductor inclosed by the tube is
shown by dotted lines in Fig. 1-and in Fig. 2.
It will be seen that one end B¹-projects beyond the tube and is screw threaded.
The opposite end B-of the conductor is tapped and interiorly threaded to receive
a screw like B¹.
The insulating material may be made of any of the substances known as non-
conductors of electricity, though preferably of some substance which can be easily
and quickly changed from a fluid or plastic state to a solid condition, as rubber
or resin.
The method of construction is very simple, it only being necessary to insert the
conductor, threaded at one end, and tapped at the other, within the tube, and hold it
centrally therein until the tube; filled with the insulating material, which surrounds
the conductor and affords it a perfect insulation and at the same time firmly fixes
its position in the tube:
A single line conductor of any desired length, can be easily and quickly formed
by screwing together the required number of sections, the projection B¹-being
inserted in the tapped end of the preceeding section as indicated by the dotted lines
in Fig. 2.
When desired the coupling which is interiorly threaded to receive a screw
projection, may be a separate piece forming a ferule to be screwed or soldered onto
the inclosed end of the conductor, in which case it should be of sufficient length
to be firmly secured to the conductor as indicated by dotted lines at the loft hand
of Fig. 2.
It will be observed that each section is complete in itself; that no nuts or bolts
or any separate piece are required to secure the sections together, that no tools are
needed to make up the line, as each successive section can be easily secured to the
line by turning the section with the hands, to screw the projecting end of one section
into the tapped end of another section. I do not wish to be limited to any particular
form for the section, as it may be extended in a straight, angular, or curved direction,
as indicated by dotted lines at the right hund end of Fig. 2.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed as communicated to me by
my foreign correspondent, I declare that what I claim is
A single-line electrical conductor and insulating conduit, composed of sections,
each section consisting of an electrical conductor, screw-threaded at one end, and
correspondingly screw-tapped at the other end, embedded in an insulating material
inclosed in a tube shorter than the conductor, whereby one end of the conductor
projects beyond the contiguous end of the tube, the several sections so formed being
connected, and electrical contact between the respective conductors maintained; by
screwing the threaded ends into the contiguous tapped ends of the successive
conductors, substantially as described.
Dated this 25th day of Santambor 1988
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.