Improvements in Protective Coverings for the Joints of Electric Cables.
Year: 1895

page_text: Date of Application, 19th Nov., 1895
'omplete Specification Left, 10th Aug., 1896-Accepted, 10th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Protective Coverings for the Joints of Electric
Cables.
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer and Chartered Patent Agent, do hereby declare
the nature of this invention (a communication to me from the Firm of Felten &
Guilleaume, of Mülheim-on-the-Rhine, in the German Empire, Cable Manu-
facturers,) to be as follows:--
This invention relates to coverings for the protection of electric cable joints,
and consists in the employment of a tube of lead, gutta-percha or similar material,
whereof one end is tapered down till it reaches the outer diameter of the cable.
Within the opposite end of the tube a similar but smaller tube of the same or
similar material fits; the outer extremity of the latter terminating in the same
manner with a tapered end corresponding with the outer diameter of the cable.
In applying the protective covering to a joint in an electric cable, the two
members are slipped one upon each of the wires to be connected together; and
the joint between these having been made, the two parts of the covering are
brought together, so as to embrace the joint in the cable, the open end of the
smaller tube entering the mouth of the larger one and fitting therein. The two
parts of the covering are then jointed together, and finally the outer or tapered
extremities of the complete covering are soldered or otherwise jointed to the
respective wires.
Dated the 19th November 1895
G. G. M. HARDINGHAM.
COMPLETE SPECIFICATION.
Improvements in Protective Coverings for the Joints of Electric
Cables.
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer and Chartered Patent Agent, do hereby declare
the nature of this invention (a communication to me from the Firm of Felten &
Guilleaume, of Mülheim-on-the-Rhine, in the German Empire, Cable Manu-
facturers,) and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
This invention relates to coverings for the protection of electric cable joints,
and consists in the employment of a tube of lead, gutta-percha or similar material,
whereof one end is tapered down till it reaches or nearly reaches the circumference
of the cable. Within the opposite end of the tube a similar but smaller tube of
the same or similar material fits, the outer extremity of the latter terminating in
the same manner with a tapered end corresponding with the outer surface of the
cable.
Fig. 1 of the accompanying drawings illustrates a protective covering constructed
in accordance with this invention and applied to the joint of an electric cable.
Fig. 2 is a longitudinal section of the covering; the cable being omitted.

page_text: a is a tube of lead, gutta-percha or similar material; 6 being a smaller tube of
like material fitting the larger end of the tube a. c is the cable. dd¹ are
respectively the tapered or reduced terminations of the tubes a and b.
In applying the protective covering to a joint in an electric cable, the two
members a, b are slipped one upon each of the wires or ends of the cable to be
connected together, and, the joint between these having been made, the two parts
of the covering are brought together so as to embrace the joint in the cable c; the
open end of the smaller tube b entering the mouth of the larger one a and fitting
therein. The two parts of the covering are then jointed or soldered together, and,
finally, the outer or tapered extremities dd of the complete covering are
respectively soldered or otherwise jointed to the wires or cable. The joint in the
cable is preferably disposed within the part a of the protective covering, because
it is thereby more effectually protected from injury. Owing to the non-coincidence
of the joint in the covering with that in the cable, the weakness which usually
prevails at this point is largely diminished.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I claim :—
1. A protective covering for the joints of electric cables, constructed sub-
stantially as herein described, and comprising a bi-part tube of lead, gutta-percha
or similar material; the outer extremities being tapered down to correspond with
the diameter of the cable.
2. For protecting the joints of electric cables, a covering consisting of a bi-part
tube composed of lead, gutta-percha or similar material, one part fitting over the
end of the other, whilst the outer extremities of the complete covering are tapered
so as to lie even with the surface of the cable to which they are jointed,
substantially as described.
Dated this 10th day of August 1896.
G. G. M. HARDINGHAM.