Improved Means of Making Connection with Electric Cables.
Year: 1898

page_text: Date of Application, 7th July, 1898
Complete Specification Left, 6th Apr., 1899-Accepted, 6th May, 1899
PROVISIONAL SPECIFICATION.
Improved Means of Making Connection with Electric Cables.
We, ROBERT JAMES HATTON, of Llanberis, Carnarvon Road, Stratford, in the
County of Essex, Engineer, and W. T. HENLEY'S TELEGRAPH WORKS COMPANY
LIMITED, of 27, Martin's Lane, Cannon Street, London, E.C., do hereby declare
the nature of this invention to be as follows:-
This invention relates to a simple and efficient means of sealing the insulation
in making end connection with electric cables whether single, or of the double
or triple concentric kind.
The device, as used for a double concentric cable, comprises a box or casing
made of insulating material having at one end an opening into which screws
a tubular plug adapted to fit closely around the full diameter of the cable which
enters the box through said plug the opposite end of the casing having an
aperture fitting exactly around, and giving passage to, the bared inner conductor
of the cable which projects from the end of the casing and on which is clamped
the one connection. In the side of the casing, at a point opposite to the bared
outer conductor of the cable is an aperture into which screws, by a coarse thread,
a tubular plug adapted to give passage to the stem of the other connection. This
connection screws, with a fine-threaded screw, into a lug clamped or otherwise
secured about the bared end of the outer conductor, the stem of the said connec-
tion being pinned to the plug through which it passes so that owing to the
difference in the pitch of the screw threads accidental unscrewing will be pre-
vented. Before this last mentioned plug is screwed in, insulating compound is
run into the casing so as to entirely fill it up.
In the case of a triple concentric cable there would be a second similar lateral
aperture closed by a screw plug giving passage to the stem of the connection the
one connection being coupled with the intermediate and the other with the
outer conductor.
In the case of a single cable a solid plug would be used to close the aperture
at which the insulating compound is run into the casing.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.

page_text: LIMITED, of 27, Martin's Lane, Cannon Street, London, E.C., 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 state-
ment:-
This invention relates to a simple and efficient means of scaling the insulation
in making end connection with electric cables whether single or of the double
or triple concentric kind.
The device is illustrated in the accompanying drawing in longitudinal section
and is adapted for use with a double concentric cable whereof a is the inner con-
ductor, the outer conductor, ce are the layers of insulation between the inner
and outer conductors and between the outer conductor and the metal or other
sheathing d, e is the connection to the end of the inner conductor a, and f is
the connection to the outer conductor b.
The device comprises a box or casing of cylindrical form made of earthen-
ware or other insulating material closed at one end with the exception of an
opening fitting exactly around, and giving passage to, the bared inner con-
ductor a of the cable which projects from this end of the casing and on which the
connection e is secured after the cable has been inserted. The other end of the
casing is made open nearly to the full internal diameter of the casing so as to
give passage to the connection f which is attached to the outer conductor before
the cable is inserted in the casing and this end of the casing is internally screw-
threaded to receive a tubular screw-threaded plug or gland which fits closely
around the sheathing (being slipped thereon before the connection f is
attached) and by which the end of the casing is closed after the cable has been
inserted.
In the side of the casing, at a point opposite to the bared outer conductor of
the cable is a screw-threaded aperture into which screws, by a coarse thread, a
tubular plug or gland adapted to give passage to a stem g whose inner end
screws, with a fine-threaded screw, into the lug or connection f secured about
the bared end of the outer conductor b. the stem being connected to the gland i
by a cross-pink driven through the stem and engaging in a notch in the gland
so that owing to the difference in the pitch of the screw threads accidental un-
screwing of the stem will be prevented. Before the gland or plug jis screwed in,
insulating compound in a liquid or plastic state is run into the casing h. so as to
entirely fill it up, thus completely enveloping the bared portions of the inner
and outer conductors within the casing and sealing up the ends of the insulating
layers c c.
In the case of a triple concentric cable there would be a second lateral aperture
closed by a screw plug or gland similar to j and giving passage to another stem
similar to g screwing into a connection similar to f. the one connection f being
coupled with the intermediate conductor and the other one with the outer con-
ductor, the whole being enclosed in the insulating compound run into the casing
as before.
In the case of a single cable a solid screw plug would be used instead of the
gland to close the lateral aperture at which the insulating compound is run
into the casing.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed we declare that what we
claim is
The hercin described means of sealing the insulation in making end connec
tion with an electric cable, the said means consisting of a casing of insulating
material enclosing the severed end or ends of the insulating covering or coverings
and the adjacent bared portions of the conductor or conductors, the said casing
being closed at the one end by a screw gland fitting closely around the sheathing
of the cable and being provided with a lateral aperture (or apertures) closed by

page_text: a screw gland and adapted to give passage to the stem of a lateral connection
and the casing being filled up with insulating compound run in after the con-
nections have been made substantially as herein described.
Dated this 6th day of April, 1899.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.