Improvements in Conduits for Electric Conductors.
Year: 1893

page_text: Date of Application, 5th Oct., 1893
Complete Specification Left, 4th July, 1894-Accepted, 4th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in Conduits for Electric Conductors.
I CHARLES GORDON PICKING of Bound's Green Potteries, New Southgate in
the County of Middlesex Engineer do hereby declare the nature of this invention
to be as follows:-
The object of this invention is to provide a conduit for electric conductors which
whilst providing the necessary protection against external damage will at the same
time afford perfect insulation to the conductors.
socket and
I manufacture the conduits in lengths and either with one passage way or with
several passage ways therethrough. Each length is formed with
spigot end and in a manner such that the lengths engage with each other so as to
prevent twist and secure concentricity of all the lengths.
I may make the conduit with a longitudinal cap or cover so that the conductors
may be laid in instead of being drawn through the conduits. This is more
especially adapted to cases in which there is but one passage way through the
lengths.
The conduits I prefer to make of a strong semi-porous material such as stone-
ware earthenware or burnt clay and to coat them both internally and externally
with bitumenous matter the result being a non-conducting conduit of the most
perfect nature and continuity and of sufficient strength to withstand external
forces and in which by the application of a hot iron all the joints as laid can be
made good with bitumenous matter.
Dated this 5th day of October 1893.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Conduits for Electric Conductors.
1 CHARLES GORDON PICKING of Bound's Green Potteries New Southgate in
the County of Middlesex 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 :-
The object of this invention is to provide a conduit for electric conductors which
whilst providing the necessary protection against external damage will at the same
time afford perfect insulation to the conductors.
I manufacture the conduits in lengths and either with one passage way or with
several passage ways therethrough. Each length is formed with a socket and
spigot end and in a manner such that the lengths engage with each other so as to
prevent twist and secure concentricity of all the lengths.
I may make the conduit with a longitudinal cap or cover so that the conductor
may be laid in, instead of being drawn through, the conduits. This is more
especially adapted to cases in which there is but one passage way through the
lengths.
The conduits I prefer to make of a strong semi-porous material such as stone-
ware earthenware or burnt clay and to coat them both internally and externally
with bituminous matter the result being a non-conducting conduit of the most

page_text: perfect nature and continuity and of sufficient strength to withstand external forces
and in which by the application of a hot iron all the joints as laid can be made
good with bituminous matter.
The lengths may be straight or inclined or curved to suit the directions which
the conduits are required to take when laid.
Figure 1 is an end elevation and Figure 2 a longitudinal horizontal section of a
conduit made in accordance with my invention it having five separate passages
therein but as before mentioned, one such passage or any number of such passages
can be used.
a are projections and are recesses at the ends of the lengths which engage
together to prevent the lengths twisting relatively to each other.
The conduits need not be circular in cross section as they can be of any other
shape for instance of the shape shewn in transverse section in Figure 3 where
three passages are shewn side by side. These lengths may each be made in one
piece with a socket at one end or in separate pieces connected together.
Figure 4 shews in transverse section a conduit with a cover at top so that when
the covers are removed the conductors can be laid in the conduit from above in
place of being drawn in from the end the covers being afterwards secured firmly
in place by any suitable means for example by means of a hot iron applied to the
cover and conduit so as to cause bitumenous matter to seal the joints as herein-
before explained. The socket to receive the adjacent length is formed partly on
the main portion of the conduit and partly on the cover.
Figure 5 shews in transverse section a conduit for a single conductor each length
of the said conduit being moulded with a socket and with notches as at c to facilitate
the separation of the part d from the part e if required which parts after being
separated may be reconnected by means of bitumen or other suitable cement.
Notches similar to those shewn at c in Figure 5 may if desired be formed in
conduit shewn in Figure 4 at any suitable part to facilitate the separation of the
upper part from the lower part for the insertion and removal of the conductors.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. Conduits for electric conductors formed in lengths with a passage way or
separate passage ways formed therein and with socket and spigot ends and with
means for engaging the lengths so that twist is prevented and concentricity of all
the lengths is secured substantially as hereinbefore described.
2. Conduits for electric conductors formed as claimed by the preceding claiming
clause but provided with covers for the purpose described.
3. Conduits for electric conductors formed as claimed by either of the preceding
claiming clauses in earthenware or burnt clay or equivalent strong semi-porous
material coated or covered internally and externally with bitumenous matter
substantially as and for the purposes hereinbefore described.
Dated this 3rd day of July 1894.
CHARLES GORDON PICKING.