AN IMPROVE- MENT IN PROTECTORS FOR THE INSULATORS OF AERIAL TELEGRAPH WIRES
Year: 1884

page_text: I, BENNETT PELL of No. 14 Union Court, Old Broad Street in the City of
London, Electrician' do hereby declare the nature of my invention for AN IMPROVE-
MENT IN PROTECTORS FOR THE INSULATORS OF AERIAL TELEGRAPH WIRES to be
as follows:-
"
J
'
The ceramic or glass insulators employed for aërial telegraph wires are in many.
cases protected against injury by metal hoods which are attached on the tops of the
insulators, and consequently, when the hood'sustains a blow, the insulator itself is ?
apt to be broken or injured. According to my invention, I provide against this by
employing, for protecting an insulator, a metal cup or case open at the top and
attached at its base to the support of the insulator, preferably by the same stem as
that which carries the insulator itself. This cup or case extends up from the point
of attachment in cylindrical or conoidal form around the insulator, but at some
distance from it, so as to leave an annular space between it and the insulator! The
cup or casing, instead of being in. one piece, may consist of cylindrical segments
bent up from the flat and stiffened by ribs, or it may consist of wires or of wire
net or basket work. When it is made in a single piece, openings are provided at
the bottom for the escape of water. The base of the cup or casing may have
insulating material interposed between it and the metal stem which fixes it, and its
supporting arm, so as to prevent conduction.
Dated this 18th day of January 1884.
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page_text: I, BENNETT PELL of N° 14 Union Court Old Broad Street in the City of
London Electrician do hereby declare the nature of my invention for "AN IMPROVE-
MENT IN PROTECTORS FOR THE INSULATORS OF ÄERIAL TELEGRAPH WIRES" and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The ceramic or glass insulators employed for äerial telegraph wires are in many
cases protected against injury by metal hoods which are attached on the tops of the
insulators, and consequently, when the hood sustains a blow, the insulator itself is
apt to be broken or injured. According to my invention, I provide against this by
employing, for protecting an insulator a metal case or cup open at the top and
attached at its base to the support of the insulator, preferably by the same stem as
that which carries the insulator itself. This cup or case extends up from the point
of attachment in cylindrical or conoidal form around the insulator, but at some
distance from it so as to leave an annular space between it and the insulator The
cup or casing, instead of being in one piece, may consist of cylindrical segments
bent up from the flat and stiffened by ribs; or it may consist of wires or of wire
net or basket work. When it is made in a single piece, openings are provided at
the bottom for the escape of water. The base of the cup or casing may have
insulating material interposed between it and the metal stem which fixes it and its
supporting arm so as to prevent conduction.
.
Fig. 1 of the accompanying drawings shews a part elevation and part section of
one form of my before described protective casing as applied to an ordinary
insulator for telegraph wires; Fig 2 shews a plan partly from the underside and
partly from the top side. A is a metal cylinder, open at top and bottom and of
somewhat larger internal diameter than the insulator B, so as to leave an annular
space between the two; it is supported by arms G. radiating from a central boss which
is fitted on to the stem of the insulator as shewn. It will be evident, however, that
the cylinder may be supported from one side only, or in any other convenient
manner; also, instead of being made of one solid piece, it may be of separate pieces
bent into cylindrical form, or it may consist of wire net or basket work as before
stated.
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:
The use in combination with insulators for electrical conductors, of a surrounding
metal cup or case open at top and connected at its lower part to the support of the
insulator substantially as herein described.
Dated this 14th day of October 1884.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.