An Improvement in Field Telegraph and other similar Conductors.
Year: 1888

page_text: Date of Application, 17th May, 1888
Complete Specification Left, 26th Jan., 1889
Complete Specification Accepted, 2nd Mar., 1389
PROVISIONAL SPECIFICATION.
An Improvement in Field Telegraph and other similar Conductors.
1, RICHARD VON FISCHER TREUENFELD, Electrical Engineer, 12 Queen Anne's
Gate, Westminster, in the County of Middlesex, S.W. do hereby declare the nature
of this invention to be as follows:-
This invention relates to the construction of a conductor for field telegraph, electrical,
mining, and other electrical purposes, in such a manner that it possesses great tensile
strength consistently with lightness and smallness of bulk, and that in rapidly laying
or taking up, there is little tendency to snarl or kink.
For this purpose, 1 twist a number of fine wires to the one hand, and over them I
twist a number of fine wires to the opposite hand, thus forming the conductor of a
large number of fine wires so arranged that there is no tendency to twist in either
direction. By using steel for the wires I obtain great tensile strength in small weight
and bulk.
In order however to reduce electrical resistance I prefer to use copper for some of
the wires, 1 cover the wire cord formed as above described with rubber or other
flexible insulating material forming a tube enclosing the wires and over this I form a
jacket of fabric by taping or braiding, which jacket I preferably varnish.
When it is desired to provide also a return conductor I twine over the insulating
cover a number of fine wires over which I form the tape or braided jacket.
1000
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
4
An Improvement in Field Telegraph and other similar Conductors.
1. RICHARD VON FISCHER TREUENFELD, Electrical Engineer, 12 Queen Anne's
Gate, Westminster, in the County of Middlesex, S.W. 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 a conductor for field-telegraph,
electrical mining, and other electrical purposes, in such a manner that it possesses
great tensile strength consistently with lightness and smallness of bulk, and that in
rapidly laying or taking up, there is little tendency to snarl or kink.
For this purpose, I twist or lay a number of fine wires to the one hand, and over
them 1 twist or lay a number of fine wires to the opposite hand, thus forming the
conductor of a large number of fine wires so arranged that there is no tendency to
twist in either direction.
By using steel for the wires I obtain great tensile strength in small weight.
and bulk.
In order, however, to reduce electrical resistance I prefer to use copper for some
of the wires which may be disposed in the centre or in the superposed layers. When
there are only two layers superposed on a central wire, 1 prefer to make this central
wire of copper and to place copper wires in the second or outside layer so as to lessen
the twisting force of the outer layer which contains a greater number of wires or
has its wires acting at greater radius than in the inner layer. I cover the wire cord
formed as above described with rubber or other flexible insulating material forming
a tube enclosing the wires and over this I form a jacket of fabric by taping or braiding
which jacket I preferably varnish.
When it is desired to provide also a return-conductor I twine over the insulating
cover a number of fine wires over which I form the tape or braided, jacket.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I would have it understood
that I make no general claim to the combination of steel and copper wires to form a
conductor, but what I claim is :-
Constructing a strong but light electrical conductor by arranging fine wires in
several layers twisted or laid to opposite bands, substantially as and for the purpose
set forth.
Dated this 36th day of tau1000