Improvements in Insulators for Pipe Conduits for Electric Mains.
Year: 1893

page_text: Date of Application, 16th Sept., 1893
Complete Specification Left, 21st May, 1894-Accepted, 23rd June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Insulators for Pipe Conduits for Electric Mains.
I, WILLIAM HARDING SCOTT, Electrical Engineer of Gothic Works, King
Street, Norwich, do hereby declare the nature of this invention to be as follows:-
In pipe conduits for electric mains in which insulators are used, such as those which
have holes in them round, rectangular or other shape having rounded or conical edges
or openings as described in my Patent No. 13507", I by this invention make the
insulators so that they can be used with ordinary sanitary, concrete, iron or other
pipes.
I make the insulators of glass or hard vitrified stoneware, or other suitable
material, & shape them so that they catch in the pipes in two or more places; and
in order that the insulation may be improved I make these points where they
touch the pipes with as small an area as possible & also as far away from the
conductors as possible. With this object I shape the insulator with prominent
corners which rest in little places that are chipped out of the pipe. I should
preferredly have not less than three corners touching so that the insulator may be
thoroughly supported, but for small insulators where there will not be much strain,
two corners may be sufficient. By supporting the insulators on these corners alone
not only is the insulation improved, but they are easily fitted into any ordinary
pipes, such as are made for other purposes.
It is obvious that insulators with these supporting corners, as described above,
may be made to carry the conductor in a variety of ways, and I do not confine
myself in this invention to the method of carrying the conductors as described in
my Patent No. 135079.
Dated this Diftrauch dan
1000
COMPLETE SPECIFICATION.
Improvements in Insulators for Pipe Conduits for Electric Mains.
I, WILLIAM HARDING SCOTT of Gothic Works, King Street, Norwich in the
County of Norfolk, Electrical Engineer do hereby declare the nature of my
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
My invention relates to insulators for pipe conduits for electric mains in which
insulators are used, such as those which have round rectangular or other shape
holes in them having rounded or conical edges or openings as described in the
Specification of Letters Patent No. 13507 of 1892 granted to me.
According to my present invention I make the insulators so that they can be used
with ordinary sanitary, concrete, iron or other pipes of circular rectangular or
other shape in cross section. I make the insulations of glass or hard vitrified
stoneware or other suitable insulating material and shape them so that they catch
or engage in the pipes in two or more places or points and in order that the
insulation may be improved I make these points where they touch the pipes
with as small an area as possible, and also as far away from the conductors as
possible.
With this object I shape the insulator with prominent corners or projecting
points which rest in little places or recesses that are chipped out of or formed in

page_text: the pipe. 1 preferably provide the insulator with not less than three corners or
points touching the pipe so that the insulator may be thoroughly supported. Such
an insulator is shewn engaged with a pipe in cross and longitudinal sections in
Figures 1 and 2 but for small insulators where there is not much strain two corners
or points may be sufficient as shewn in Figure 3. Figure 4 shews an example
wherein four corners or points are used.
In all the figures the pipe is marked A and the insulators B. The corners or
points on the insulators are marked and the recesses made in the pipes for their
reception are marked a. e shews cement for securing the insulators in place. By
supporting the insulators on these corners or points alone, not only is the insulation
improved but the insulators are easily fitted into any ordinary pipes such as are
made for other purposes.
It is obvious that insulators with these supporting corners or points as herein-
before described may be made to carry the conductors in a variety of ways and I
do not confine myself in this invention to the method of carrying the conductors as
described in the Specification of the aforesaid Letters Patent No. 135079.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
Insulators for pipe conduits for electric mains the said insulators having corners
or points (b) by which the insulators are secured in the pipe conduits substantially
-as and for the purpose hereinbefore described.
Dated the 01
1004
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, Agents.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, Agents.