Improvements in the Manufacture and Production of Electric Cables.
Year: 1897

page_text: Date of Application, 3rd Aug., 1897
Complete Specification Left, 28th Apr., 1898-Accepted, 30th July, 1898
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture and Production of Electric Cables.
I, HENRY EDMUNDS, of 39, Victoria Street, in the City of Westminster, Electrical
Engineer, do hereby declare the nature of this invention to be as follows:-
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My invention relates to electric cables of the kind known as armoured cables,
wherein a lead, or other metal, sheath is applied over the ordinary insulating
material of the cable. In undergound conductors this metal armouring, cape-
cially in certain soils, is very liable to be injuriously affected. It has been, in
certain cases, the custom to lay such cable in troughs into which bitumen is after-
wards filled; but this is an inconvenient, and expensive, proceeding, and it is the
object of my invention to provide a cable which can be laid in place without
need for such troughs laid in the ground to receive them.
According to my invention I apply to the metal armouring a covering, or tube,
of a material which is not injuriously acted upon when laid in soil of any
character, and which is sufficiently pliable to remain permanently in place on
the armouring and allow of the bending of the cable where required. The said
covering, or tube, is applied in the process of manufacturing the cable, and may
be so applied in any suitable manner; for example, by means of a covering
machine like that which is used in applying a lead armouring to cables, or any
suitable squirting machine. The material employed for the said covering may
be of any suitable kind possessing the characteristics hereinbefore stated. A suit-
able material consists for example of oxidized oils, or the like, combined with a
binding material, such as ground cork, or talc, or asbestos, or French chalk, or the
like. These coverings do not contain tape yarn or other fibrous material but form
a homogeneous covering without air spaces so that water or moisture cannot pene-
trate through the said covering. The metal sheathing may be of any suitable
character such as lead, or strips of steel covered with insulating material, and
wound spirally into tubular form.
Dated this 3rd day of August 1897
41, Lincoln's Inn Fields, London, W.C., Agents
COMPLETE SPECIFICATIO:
Improvements in the Manufacture and Production of Electric Cables.
I, HENRY EDMUNDS, of 39, Victoria Street, in the City of Westminster, Electrical
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:-
My invention relates to electric cables of the kind known as armoured cables
Improvements in the Manufacture and Production of Electric Cables.
I, HENRY EDMUNDS, of 39, Victoria Street, in the City of Westminster, Electrical
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:-
My invention relates to electric cables of the kind known as armoured cables

page_text: wherein a lead, or other metal sheath, is applied over the ordinary insulating
material of the cable. In undergound conductors this metal armouring espe-
cially in certain soils, is very liable to be injuriously affected. It has been in
certain cases, the custom to lay such cable in troughs into which bitumen is after-
wards filled; but this is an inconvenient, and expensive, proceeding and it is the
object of my invention to provide a cable which can be laid in place without
need for such troughs laid in the ground to receive them.
According to my invention, I apply to the metal armouring a covering, or tube,
of a material which is not injuriously acted upon when laid in soil of any
character and which is sufficiently pliable to remain permanently in place on
the armouring and allow of the bending of the cable where required. The said
covering, or tube, is applied in the process of manufacturing the cable and may
be so applied in any suitable manner; for example, by means of a covering
machine like that which is used in applying a lead armouring to cables or any
suitable squirting machine. The material employed for the said covering may
be of any suitable kind possessing the characteristics herein before stated. A suit-
able material consists for example of oxidized oils, or the equivalent such as pitch
or mixtures of pitch and oxidized oil combined with a material, such as ground
cork, or talc, or asbestos, or French chalk or the like. I may combine these ingre-
dients in the following proportions:-
70 parts of the oxidized oil or the like, for example;-
60 parts of pitch and 10 parts of oxidized linseed oil.
43 to 48 parts of French chalk, or a mixture of French chalk with sulphur
say:
40 parts of French chalk and 3 to 8 parts of sulphur.
These coverings do not contain tape, yarn or other fibrous material but form
a homogeneous covering without air spaces so that water or moisture cannot pene-
trate through the said covering. The metal sheathing may be of any suitable
character such as lead, or strips of steel covered with insulating material and
wound spirally into tubular form.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is:-
-
1
The manufacture and production of an electric cable having an armouring or
metal sheathing which has applied thereto a material of the character aforesaid
for protecting the armouring as herein before set forth.
Dated this on day o1
Арти 1050.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.