Improved Fuse Box for Electric Light Cables.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improved Fuse Box for Electric Light Cables.
We, W. T. HENLEY'S TELEGRAPH WORKS COMPANY LIMITED, of 27, Martin's
Lane, Cannon Street, in the City of London, and DAVID STEWART STRANG,
77, Mallinson Road, Wandsworth Common, London, S.W., Electrical Engineer,
do hereby declare the nature of this invention to be as follows:-
An improved fuse box for electric light cables by the introduction
of a divided socket capable of taking in the armouring of cables and
allowing the cable to be laid in position instead of pushed through a
hole in the bottom of the box as at present. The cables are thus thoroughly
protected from mechanical injury the armouring being taken inside the gland &
not stripped back & terminating outside the iron box. It also allows facilities
for thoroughly sweating the necessary joints, thus securing better workmanship
& immunity from danger.
The boxes hitherto designed and patented have not been watertight in this
invention this omission is rectified by putting an additional flange on the top of
the box into which the lid itself fits and also by having a flange cast on the inside
of the lid which will prevent the entrance of moisture into the box.
.
In addition to this the lid is fixed on to the box with a permanent stud &
milled nut instead of an eye through which a pin is drawn as in present boxes.
Dated this 6th day of April 1898.
Improved Fuse Box for Electric Light Cables.
We, W. T. HENLEY'S TELEGRAPH WORKS COMPANY LIMITED, of 27, Martin's
Lane, Cannon Street, in the City of London, and DAVID STEWART STRANG,
of 77, Mallinson Road, Wandsworth Common, London, S.W., 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: —
This invention relates to safety fuse boxes for electric light cables wherein resin,
oil, and the like insulating compounds are used and the invention has for object to
ensure the cable being thoroughly protected from mechanical injury by the armour-
ing being taken through the gland instead of being stripped back and terminating
outside the fuse box, to enable a tight joint to be made around the armouring, to
facilitate the introduction of the cable into the box directly therein instead of being
inserted endwise through a hole and consequently to facilitate the sweating of
the joints on the cable ends which are to lie within the box by enabling such
operation to be performed before the joints are laid in the box and thus ensure
better workmanship and immunity from danger.

page_text: The invention also has for object to make a water-tight closure of the box-lid.
The invention will be described with reference to the accompanying drawings
wherein Figure 1 is a longitudinal section of the fuse box on line - Figures 2
and 3. Figure is a plan of the box partly uncovered. Figure 3 is, an end
elevation shewing the divided socket through which the concentric cable enters
the box.
A is a concentric cable whereof the inner and outer conductors a¹, a, are con-
nected with branch cables B1, B2, by safety fuses C, C, connected to the respective
conductors by the usual clamping devices which are sweated on to said conductors.
The armoured part of the cable A enters the one end of the box 1 through a
tubular socket made in two halves E, E, divided on the horizontal plane and
making a rebated joint at e. The lower half is cast in one with the box and the
upper half E is in one with a plate removably fitted in a corresponding gap
extending to the top edge of the box in which said plate & makes a sliding fit by
tongue and groove joint so as to enable the upper half E of the socket to be
placed in position after the cable A has been laid in the lower half of the socket,
the two halves being then united by lugs and screws F is a collar or gland
which is sweated on to the.armoured portion of the cable before being laid in
the socket and which is shouldered to fit in and against the end of the socket E, E¹,
so as to make a tight closure thereof. At the opposite end of the box the branch
cables B1, B2, are provided with similar glands or collars F1 which close holes in
the box end, through which these cables are introduced endwise after the clamps
have been sweated on to the conductors, the holes being large enough to give
passage to the clamps in the case of single cables. The part of the cover of the
box extends only a portion of its length from this end and is secured by counter-
sunk screws and is provided with a flange & fitting within the end and sides
of the box and in this top portion is fixed a screw stud g to receive a milled nut G
by which a separately removable cover H is secured. This cover H completes the
top of the box with the sides and end of which it makes a joint by means of an
inwardly projecting flange h, the cover being held in place at the one end by its
edge h¹ entering a groove formed beneath a lip 2 cast on the end of the box and
at the other end by the part 3 overlapping the cover ] being firmly held down
thereon by the screw nut G. The cover H has a framed aperture H in which a
plate of glass is fitted, to permit inspection of the interior. Within the box is
fixed a block of insulating material K in which are fixed the bolts c for securing
the fuse strips to the clamps, the block K having an upstanding partition & between
the two fuses.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is -
1. The herein described fuse box for electric light cables, adapted to receive and
to make a joint with the armoured end of the cable by means of a divided socket
constructed and arranged substantially as and for the purposes specified.
2. The herein described fuse box for electric light cables having a divided
socket to receive the armoured end of the cable as described and a cover made in
two separately removable portions secured and fitted to make a water-tight closure
substantially as described.
Hated thin 71
• 11
1000
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.