Improvements in the Manufacture and Production of Electric Cables or Conductors.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Manufacture and Production of Electric
Cables or Conductors.
I, GEORGE EDWARD HEYL of 34 Endlesham Road, Balham in the County
of Surrey, Engineer do hereby declare the nature of my invention to be as
follows:-
This invention has for its object to provide cables or conductors which are
insulated in such a way as not to interfere with the efficiency of the conductor, air
and moisture being removed and the subsequent access of air and moisture to the
cable or conductor prevented.
According to this invention the cable or conductor is surrounded by a protecting
tube or shield so constructed or formed and closed at its ends that liquid will not
enter to the interior of the tube or shield. The cable or conductor thus enclosed
in the tube or shield is then immersed in a bath of a material which is liquefied by
heat but which becomes set or solidified on cooling to prevent the passage of air.
The bath is raised to a high temperature and this evaporates any moisture and
expels it and air from the interior of the tube or casing and then, when the cable
or conductor and its tube or casing are removed from the bath, the material of the
bath which covers the tube or casing becomes at once set or solidified so as to
prevent the re-entry of air or moisture to the cable or conductor. I do not limit
myself to the particular details by which my invention is performed but a
convenient way is to cover the individual conductors with paper and then to enclose
the whole of them in a paper wrapping and then with metal strip or wire wound
closely thereon and then again with paper and then to plug up the ends or place
plugs at the ends through which the wires protrude to enable the lengths of cable
or conductor to be connected together and then to place the conductor in a bath of
matter which is solid or becomes set at ordinary temperatures but is liquified by
heat to such a degree that moisture and air are expelled from the casing or shield
and then to withdraw the cable or conductor and casing or shield gradually
lengthwise from the bath the material adhering to the casing or shield becoming
set or solidified thereupon as the article is withdrawn from the bath.
Dated this 12th day of July 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
Improvements in the Manufacture and Production of Electric
Cables or Conductors.
I, GEORGE EDWARD HEYL of 34 Endlesham Road, Balham, in the County of
Surrey, Engineer, do hereby declare the nature of my 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 cables or conductors which are

page_text: insulated in such a way as not to interfere with the efficiency of the conductor, air
and moisture being removed, and the subsequent access of air and moisture to the
cable or conductor prevented.
According to this invention the cable or conductor is surrounded by a protecting
tube or shield, so constructed or formed and closed at its ends, that liquid will not
enter to the interior of the tube or shield. The cable or conductor thus enclosed
in the tube or shield is then immersed in a bath of a material (for example resin
oil or oxidized mineral oil) which is liquified by heat, but which becomes set or
solidified on cooling to prevent the passage of air. The bath is raised to a high
temperature and this evaporates any moisture and expels it, and air, from the
interior of the tube or casing and then, when the cable or conductor and its tube
or casing are removed from the bath, the material of the bath, which covers the
tube or casing, becomes at once set or solidified so as to prevent the re-entry of air
or moisture to the cable or conductor. I do not limit myself to the particular
details by which my invention is performed but a convenient way is to cover the
individual conductors with paper, and then to enclose the whole of them in a paper
wrapping, and then with metal strip, or wire, wound closely thereon, and then again
with paper, and then to plug up the ends, or place plugs at the ends, through
which the wires protrude, to enable the lengths of cable or conductor to be
connected together and then to place the conductor in a bath of matter which is
solid or becomes set at ordinary temperatures, but is liquified by heat to such a
degree that moisture and air are expelled from the casing or shield, and then to
withdraw the cable or conductor and casing or shield gradually lengthwise from
the bath, the material adhering to the casing or shield becoming set or solidified,
thereupon, as the article is withdrawn from the bath.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what 1
claim is
The manufacture of electric cables or conductors which are insulated and
protected substantially as hereinbefore described.
Dated this 13th day of April 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.