WATERTIGHT, BOXES USED FOR THE ELECTRICAL TESTING OF CONDUCTORS AND FOR ORIGINATING OTHER CONDUCTORS
Year: 1885

page_text: I, EDGAR WILLIAM BECKINGSALE of 2 Greshamn Press Buildings Little Bridge
Street London E.C. Electrician and Contractor do hereby declare the nature of my
invention for MAKING WATERTIGHT, BOXES USED FOR THE ELECTRICAL TESTING OF
CONDUCTORS AND FOR ORIGINATING OTHER CONDUCTORS 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 my improvements is to provide a watertight box to be placed in
the pavement roadway or other position in the ground into which electrical con-
ductors are placed for the purpose testing, or for giving origin to other conductors,
laid underground.
My improvements are effected in the following ways, and in order that my
invention and the method of performing the same may be properly understood
I hereunto append a sheet of explanatory drawings to be hereinafter referred to
and representing examples of my improved appliance, the same or like parts
wherever they are repeated are represented by the same letters and figures.
Figs. 1 and 3 on the accompanying sheet of Drawings are vertical sections
showing the relative position of the watertight inner box with the outer one and
the method of making the watertight joints.
Figs 2 and 4 are plans of the same boxes.
In the arrangement shown D. D1 are two boxes of cast iron, steel, lead, brass,
or other metal, these boxes are placed one within the other, the outer one D being
of sufficient strength to resist the traffic of the roads or other disturbing influences,
the inner one D1 is to recive the boxed conductor and is made watertight in the
manner to be described.
The conductors C are admitted through apertures A. Al in the sides of the
boxes D. D 1.
When the conductors C are secured in their positions in the boxes D. D1, the
apertures A 1 which are not entirely closed by the admission of the conductors are
made watertight by either of the following processes. Resin, tar, pitch, paraffin
wax or grease or an admixture of two or more of these substances is poured into
the space S between the boxes filling it up to nearly the top of the inner box D1
[Price 4d 1

page_text: and allowed to solidify, the space left in the aperture between the inner box and
the conductor being first filled with a substance having a higher melting point than
Or the inner box
the material poured in. The Figures in reference are 1 and 2.
is made of lead or of other metal capable of being soldered, and the conductor if
already enclosed in a lead or other metal case capable of being soldered is soldered
at the aperture A1 to the side of the Box D1 making the joint watertight.
In cases where the conductor is not already encased in lead or other metal case
capable of being soldered, sleeves of lead copper, brass, or other metal capable of
being soldered are passed over the end of the conductor into position and the
soldered joint at the aperture Al is made between the sleeve and the side of the
box D1, a resinous, pitchy or wax composition is fille! in between the sleeve and
the conductor to make the whole watertight. The sleeve is from two inches to a
few feet long.
The figures in reference are 3. and 4.
The cover of iron, steel, lead or other meta's are secured on the inner box by an
ordinary watertight joint by means of screws, bolts & nuts with or without a
liner of waterproof material. Or the cover may be made of a metal that is capable
of being soldered in which case the rim R Figs 5, 6 of the cover is bent down into
a gutter G formed in the flange F of the inner box D 1. Solder H is then melted
in round the rim and uni'es it metallicly with the flange making a watertight
joint and rendering the Box D 1 watertight, or in place of solder, resin, wax, grease,
tar pitch or other easily melting water proof substance or a mixture of them may
be poured into the gutter when the cover V1 is in its place on the box D1 so as
to form a watertight joint between the rim R and the flange F of the inner box.
Having thus particularly described and ascertained the nature of my said
invention and the manner of performing the saine I declare that what I claim is
First the making of watertight joints between electrical conduct rs and the
sides of metal boxes through which the former pass, by means of resin or other
substances as herein before described or by means of soldered connection between
the casing of the conductor and the box.
Secondly the making of watertight joints between the rim of the cover of the
metal box receiving the insulated conductor and the flange of the box by means of
resin or other substance hereinbefore described, or by means of solder forming a
metallic watertight joint.
Thirdly the application of the above described improvements is to boxes placed
in the ground and used for the purposes of testing Electrical conductors and for
giving origin to other conductors.