Improvements in the Manufacture of Electric Cables.
Year: 1894

page_text: Date of Application, oth July, 1894
Complete Specification Left, 4th Apr.. 1895-Accepted, 11th May, 1895
Date of Application, oth July, 1894
Complete Specification Left, 4th Apr.. 1895-Accepted, 11th May, 1895
IROYIDIONAL DI MULTIVATION.
Improvements in the Manufacture of Electric Cables.
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer and Chartered Patent Agent, do hereby declare
the nature of this invention (a communication to me from the Firm of Felten &
Guilleaume, of Mülheim-on-the-Rhine, in the German Empire, Cable Manu-
facturers,) to be as follows:-
--
This invention relates to the manufacture of electric cables; its object being to
produce a cable of low capacity in which the insulating material is light and
inexpensive and without breaking will readily accommodate itself to the form of
the cable when bent.
In carrying out this invention, grated or ground vegetable fibre (such as
cellulose, cork, tan and the like) or other suitable fibre or bark is employed for
insulating the conductor. The fibre may be in a natural state or may be saturated
with an insulating substance. About the insulation, for the purpose of retaining
same in position, is laid or formed a braiding or tubular covering. The conductor
may be a solid wire, or it may be composed of several wires, or several strands of
wire, twisted together. There may be more than one conductor.
On account of the porous nature of the insulating material, the cable has a low
capacity.
For affording protection against injury, the cable may be sheathed with lead,
iron tape or the like.
The cable may be manufactured with the aid of a machine through which the
conductor or conductors is or are drawn at a speed corresponding with that at
which the braiding or tubular covering is produced and applied, the space between
the latter and the conductor or conductors being filled at a corresponding speed
with the insulating material.
Dated the 6th day of July 1894.
G. G. M. HARDINGHAM.
Improvешения и ще танитастито от
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer and Chartered Patent Ageut, do hereby declare
the nature of this invention (a communication to me from the Firm of Felten &
Guilleaume, of Mülheim-on-the-Rhine, in the German Empire, Cable Manu-
facturers,) 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 manufacture of electric cables; its object being to
produce a cable of low capacity in which the insulating material is light and
inexpensive, and, without breaking, will readily accommodate itself to the form of
the cable when bent.
In the accompanying drawings, Fig. 1 represents, in transverse section, a cable
constructed in accordance with this invention; the conductor being insulated by

page_text: means of vegetable or other suitable fibre, or bark. Fig. 2 is an elevation
thereof.
In carrying out this invention, grated or ground vegetable fibre (such as
cellulose, cork, tan and the like) or other suitable fibre or bark a is employed for
insulating the conductor b. The fibre may be in a natural state or may be
saturated with an insulating substance, such as paraffin, resin or oil. About the
insulation a, for the purpose of retaining same in position, is laid or formed a
braiding or tubular covering c. The conductor b may be a solid wire, or it may be
composed of several wires, or several strands of wire, twisted together, and there
may be more than one conductor.
On account of the porous nature of the insulating material, a cable constructed
in the improved manner herein described has a low capacity.
For affording protection against injury, the cable may be furnished with a
sheathing d of lead, iron tape or the like.
The improved cable may be manufactured with the aid of a machine through
which the conductor or conductors b is or are drawn at a speed corresponding with
that at which the braiding or tubular covering c is produced and applied, the space
between the latter and the conductor or conductors being meanwhile filled at a
corresponding speed with the insulating material a.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
1. The improved manufacture of electric cables substantially as herein described
and resulting in the production of a cable having a low capacity and adapted to
withstand without injury the effects of flexure.
2. In the manufacture of cables of the kind herein referred to, drawing the
conductor through a suitably constructed machine at a speed corresponding with
that at which the covering is produced and applied, and simultaneously filling the
space between the conductor and the covering with a fibre or bark insulating
material in a granular condition.
3. In the manufacture of cables of the kind herein referred to, the employment,
substantially as set forth, of grated or ground vegetable or other suitable fibre or
bark for insulating the conductor or conductors.
Dated the 30th day of March 1895.
G. G. M. HARDINGHAM.