Improvements in Electrical Conductors.
Year: 1890

page_text: Date of Application, 13th Oct., 1890
Complete Specification Left, 13th July, 1891-Accepted, 15th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Electrical Conductors.
We, FREDERICK WALTON of No. 4 Portugal Street, Lincoln's Inn Fields,
in the County of London, Manufacturer, and HENRY EDMUNDS of No. 10, Hatton
Garden, in the County of London, Engineer, do hereby declare the nature of
this invention to be as follows:-
This invention relates to the construction of electrical conductors, especially
such as form supply mains in such a manner that their conductivity can be
increased according as they have to supply a greater amount of electricity. For
this purpose, a flexible tube of good conducting metal, such as copper, made in
the known manner by coiling helically a strip of the metal corrugated in such a
way that the convolutions interlock. This tube is covered externally with insulating
material, and this may be protected by armouring. Within the tube are laid
several bare conducting wires which being in contact with each other and with the
tube simply add to the conducting area.
According as there is an increased demand for electricity, additional wires are
drawn into the tube. Thus when the conductor is first laid, there need only be
the expenditure for copper wire that is required for a moderate supply of electricity,
additional copper being provided according as the demand increases. At intervals
along the line, the lengths of tube are connected to suitable insulated junction boxes
which present externally fittings to which branch conductors can be connected.
The junction boxes are made to open in such a way that fresh lengths of wire can
be drawn through them into the tube.
Dated this 13th day of October 1890.
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Electrical Conductors.
We, FREDERICK WALTON of No. 4 Portugal Street, Lincolns Inn Fields,
in the County of London, Manufacturer, and HENRY EDMUNDS of No. 10 Hatton
Garden, in the County of London, Engineer, 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 relates to the construction of electrical conductors, especially such
as form supply mains, in such a manner that their conductivity can be increased
according as they have to supply a greater amount of electricity. For this purpose,
a flexible tube of good conducting metal such as copper is made in the known
manner by coiling helically a strip of the metal corrugated in such a way that the
convolutions interlock. This tube is covered externally with insulating material,
and this may be protected by armouring. Within the tube are laid several bare
conducting wires which, being in contact with each other and with the tube, simply
add to the conducting area.
According as there is an increased demand for electricity, additional wires are
drawn into the tube. Thus, when the conductor is first laid, there need only be
that expenditure for copper wire that is required for a moderate supply of
electricity, additional copper being provided according as the demand increases.
At intervals along the line, the lengths of tube are connected to suitable insulated
junction boxes, which present externally fittings to which branch conductors can be
TDA7

page_text: connected. These junction boxes are made to open in such a way that fresh lengths
of wire can be drawn through them into the tube.
Having thus described the nature of this invention and in what manner the same
is to be performed, we declare that what we claim is :-
An electrical conductor consisting of a helically coiled metallic tube externally
covered with insulating material and having within it a number of bare metal wires
suited to the electrical current to be conducted, substantially as and for the purpose
set forth.
Dated: 1911...
1001
ABEL & IMRAY,
Agents for the Applicants.