A New or Improved Insulator Device for Carrying Vertical or other similarly Suspended Electric Cables
Year: 1896

page_text: Date of Application, 28th Nov., 1896
Complete Specification Left, 19th Aug., 1897-Accepted, 6th Nov., 1897
PROVISIONAL SPECIFICATION.
A New or Improved Insulator Device for Carrying Vertical or other
similarly Suspended Electric Cables.
I, ROSLYN HOLIDAY, of Featherstone Hall, near Pontefract, in the County of
York, Electrician, do hereby declare the nature of my invention to be as follows:-
My present invention more especially relates to an Insulator arrangement for
use in the support of vertically suspended electric cables, such for instance as are
used for the conveyance of electricity from the surface to the under ground work-
ing of a coal mine, and the object of my invention is to devise a substantially
strong and simple means which shall act as a combined suspender and insulator,
and so dispense with the ordinary timber supports as hitherto generally employed;
and at the same time to render it practicable to employ a cable of much cheaper
cost, in as much as, with the use of my improved suspender insulator a cable
either without an insulating covering or with a cheaper insulating covering may
be employed.
To attain which I construct or form a cast or other iron or metal annular
trough or box, having a vertical hole through its centre and an annular flange
upon its outer periphery.
Through the annular flange suitable holes are formed for the reception of the
ends of a bent carrying bar which may receive nuts or may be otherwise secured
to said flange.
The annular trough receives a ring of india-rubber or other suitable insulating
material of suitable thickness which is fitted into the bottom thereof, and a metal
ring or hoop is then placed in a vertical position so that its lower end rests upon
the upper surface of the said india-rubber ring and its sides are perforated in order
that oil or other similar insulating liquid which I place to fill up or nearly so the
annular trough may flow from the outer to the inner side of said ring.
At the top of the ring I rest a metal disc or plate which receives the end of a
clamp the latter being arranged with suitable nuts in order to support it to said
plate.
The clamp extends through the central vertical hole of the annular trough and
is made in a flat form at its lower part so that the cable may be clamped thereto
by a loose plate and screws in a well known way.
The bent carrying bar may be hung on to any convenient support at the top of
the pit and the cable suspended by the clamp as aforesaid.
Where preferred the plate or disc may be arranged with a vertical flange to
extend over the outer side of annular trough in order to protect the latter from
dust and dirt.
It will be obvious that the said improved insulator may be modified in size and
shape to suit various requirements.
Dated this 25th November 1896.
H. F. BOUGHTON,
Barnsley. Patent Agent,

page_text: A New or Improved Insulator Device for Carrying Vertical or other
similarly Suspended Electric Cables.
I, ROSLYN HOLIDAY, of Featherstone Hall, near Pontefract in the County of
York, Electrical Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:---
My present invention more especially relates to an insulator arrangement for
use in the support of vertically suspended electrical cables, such for instance as
are employed for conducting electricity from the surface to the underground work-
ings of a coal mine, and the object thereof is to devise a substantially strong and
simple device which will act as a combined suspender and insulator and so to
dispense with the ordinary timber supports which have hitherto generally been
employed, and at the same time to render it practicable to employ a cable of much
cheaper cost inasmuch as with the use of my present improved suspender
insulator, a cable without any insulating cover or with a much cheaper insulating
covering may be employed.
To attain which I construct and arrange my improved insulator device sub-
stantially as set forth in the accompanying sheet of drawings in which
Fig. 1 is a sectional elevation of my improved insulator device shown in
suspended position.
Fig. 2 is a side elevation of same, and Fig. 3 is a sectional plan taken on line a a
of Fig. 1.
Similar letters of reference denote corresponding parts in each view.
A trough or box A preferably annular in form and composed of cast iron or
other suitable material is arranged with a vertical hole a' through its centre, and
it has either lugs a or an annular flange formed on its outer periphery through
which holes are arranged for the reception of the ends of the bent carrying bar B
which receive nuts b' or may be otherwise secured to the box A so as to be capable
of firmly supporting the same.
The annular trough or hox A receives a ring of india-rubber or other suitable
insulating substance (which rests at the bottom part thereof and a metal ring
or hoops is then placed in vertical position so that its lower end rests upon the
upper surface of the india-rubber ring (and its sides are perforated in order
that oil or other insulating fluid E which I place to fill up or nearly so the
remainder of the annular trough A, may flow from the outer to the innerside of
said ring D.
At the top of ring I rest a wrought iron or other disc or
plate H which
receives the upper end of the clamp stem j having either a cotter or other
means of suspending it in position. The said stem j¹ extends clear through the
hole a and the clamp L has the cable M secured thereto as shown.
The bent bar B may be hung on to any convenient support at the top of a pit
shaft and the cable M suspended by the clamp L as aforesaid.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what
I claim is:
1. In an insulator device for supporting vertical or similarly suspended elec-
trical cables, the combination of an annular box or trough containing a bedding
of rubber or other solid or pliable insulating substance with a ring resting
on said substance, said ring carrying a plate for the suspending support of a clamp

page_text: which passes through said box and carries the cable, the ring being partly within
the box or trough and partly immersed or otherwise in oil or other insulating
substance substantially as described and illustrated or any mere modification of
said device.
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