Year: 1886

page_text: I, ALFRED ROSLING BENNETT of 90A George Street, Edinburgh in the County of
Midlothian Telegraph 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 :-
My improved lightning guard for poles and supports carrying telegraph, telephone
or other electrical conductors, consists of a metallic wire or band, preferably of semi-
oval shape but which may be of square, round or other shape and of any suitable
cross-section constructed so as to be readily fastened to the pole, arm, or bracket by
which the insulator and conductor to be protected from lightning is supported and to
rise on two sides above the insulator over which it forms an arch or bridge.
This portion of the improved lightning guard may exactly resemble in shape the
familiar hoop-guard used by telegraph engineers to catch wires breaking loose from
their fastenings.
To the summit of the semi-oval metallic wire or band I rivet, solder or otherwise
suitably attach so as to project above it, a spike or pointed piece of metal.
To the lower portion of the semi-oval metallic wire or band I rivet, solder, or
otherwise suitably attach a metallic wire strip or bar, the other extremity of which is
buried in the earth or attached to another piece of metal so buried.
When completed, the improved lightning-guard resembles in appearance the above
mentioned hoop guard surmounted by a spike and having attached to its lower part a
wire in connection with the earth.
In countries in which telegraph and telephone supports are frequently struck by
lightning I connect the various guards on each support by a wire, a cable composed
of stranded wires, a bar, a strip or a rod of metal, in such a manner that lightning
striking any one of the guards shall find several paths to earth open through which
to discharge itself.
The accompanying drawings show the invention in side and end elevations at
figures 1 and 2 applied to a pole carrying one arm A, A, A being the guards, B, B, B,
the spikes attached thereto, C, C, wires connecting the several hoop guards and D,
the conducting wire leading to earth. Poles carrying two or more arms would be
provided with a guard at the extremity of each arm, which guards, when considered
necessary would be connected metallically to those above them.

page_text: Date of Application, 9th June, 1886.
Complete Left, 9th Mar., 1887.
Complete Accepted, 15th Apr., 1887.
PROVISIONAL SIECITIÇATION.
An Improved Lightning-guard for Poles and Supports Carrying
Electrical Conductors.
I, ALFRED ROSLING BENNETT of 90A George Street, Edinburgh in the County of
Mid Lothian, Telegraph Engineer, do hereby declare the nature of this invention to
be as follows:-
My improved lightning-guard for poles and supports carrying telegraph, telephone
or other electrical conductors, consists of a metallic wire or band, preferably of semi-
oval shape, constructed so as to be readily fastened to the pole, arm or bracket by
which the insulator and conductor to be protected from lightning is supported, and to
rise on two sides above the insulator, over which it forms an arch or bridg.e
This portion of the improved lightning-guard may exactly resemble in shape the
familiar hoop-guard used by telegraph engineers to catch wires breaking loose from
their fastenings.
To the summit of the semi-oval metallic wire or band I rivet, solder, or otherwise
suitably attach, so as to project above it, a spike or pointed piece of metal.
To the lower portion of the semi-oval metallic wire or band I rivet, solder, or
otherwise suitably attach, a metallic wire, strip or bar, the other extremity of which
is buried in the earth, or attached to another piece of metal so buried.
When completed, the improved lightning-guard resembles in appearance the above-
mentioned hoop guard surmounted by a spike and having attached to its lower part a
wire in connection with the carth.
100%
CRUIKSHANK & FAIRWEATHER,
62, St. Vincont Street, Glasgow,
Agents.

page_text: Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
:-
1. A lightning guard, for poles and supports carrying electrical conductors, con-
structed substantially as herein described.
2. For poles and supports of electrical conductors lightning guards encircling the
insulators and provided each with a conducting spike or point the guards being
electrically connected by a conductor or conductors leading to earth substantially as
described with reference to the drawings annexed.