Improvements in the Manufacture of Tubes or Conduits or the like, more especially intended for Containing Electric Cables or Con- ductors.
Year: 1898

page_text: Date of Application, 28th Oct., 1898
Complete Specification Left, 28th July, 1899-Accepted, 9th Sept., 1899
RONAL SPECIFICATION.
Improvements in the Manufacture of Tubes or Conduits or the like,
more especially intended for Containing Electric Cables or Con-
ductors.
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:-
-
My invention relates to improvements in the manufacture of tubes, conduits
or the like, which are more especially intended for containing electric cables or
conductors and has for its object to provide such tubes or the like of a more
durable nature, better insulated and less pervious to moisture.
According to my invention I form the tubes, conduits or the like of Portland
or other cement in any suitable manner and I line the said tubes or the like so
formed with bitumen or other insulating material.
Although I have described the tubes or the like as more especially designed
for containing electric cables, the said tubes or the like may be used for other
purposes to which they can be usefully applied, as for example for containing
water.
Dated this 98th day of Ontahan 1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
Improvements in the Manufacture of Tubes or Conduits or the like,
more especially intended for Containing Electric Cables or Con-
ductors.
I, HENRY EDMUNDS, of 2, Queen Anne's Gate (late 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 improvements in the manufacture of tubes, conduits,
or the like, which are more especially intended for containing electric cables, or
conductors, and has for its object to provide such tubes, conduits, or the like of
a more durable nature, better insulated and less pervious to moisture than
hitherto.
According to my invention I form the tubes, conduits, or the like, of Portland,
גז

page_text: or other, cement, in any suitable manner, and I line with bitumen, or other
insulating material, the said tubes, conduits, or the like, so formed.
The formation of the tubes, conduits, or the like, from cement may be effected
in any suitable way, and the linings may be made separately and applied to the
inside of the tubes, conduits, or the like; or the said linings may be applied to
the cement, for example, by moulding the cement around the linings, or by first
forming the cement tubes, conduits, or the like and then rotating them whilst
introducing the bituminous, or like, matter, in a liquid, or semi-liquid, condition
so that the said bituminous, or like, matter becomes spread over the interior
surface of the tube, conduit, or the like.
Although I have described the tubes, conduits, or the like, as more especially
designed for containing electric cables, the said tubes, conduits, or the like may
be used for other purposes to which they can be usefully applied; for example,
for containing water.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:
A tube, conduit, or the like, formed of cement and having applied thereto a
lining of bitumen, or other insulating material; substantially as herein before
described.
day of July 1899.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.