An Improved Method or Means for the Prevention of Accidents from the Overheating of Electrical Wires.
Year: 1890

page_text: Date of Application, 5th July, 1890
Complete Specification Left. 14th Aug., 1890-Accepted, 20th Sept., 1890
PROVISIONAL SPECIFICATION.
An Improved Method or Means for the Prevention of Accidents
from the Overheating of Electrical Wires.
I, JOHN BRADFORD of 3 Cumberland Terrace Regents Park London Gentleman
do hereby declare the nature of this invention to be as follows :-
--
The object of my invention is to effectually protect electric wires in such a manner
as to prevent accidents by the overheating of the same.
For this purpose I insulate my wires in the usual way and enclose them in ordinary
metal piping of small diameter. This pipe I again enclose within another of larger
diameter, supporting it in the centre by means of perforated discs of suitable insulating
material.
The larger external pipe I put in direct communication with the water supply
cistern of the house, froin which it is filled. At the lowest point in this outer pipe
I affix a small tap, for the purpose of releasing the air when filling with water, this
tap can also be used if required for emptying the pipe.
By the use of my invention, the pipes and wires are kept cool, and in the event of
the wires becoming overheated from any cause, no danger will result being as they are
protected by the aforesaid pipes.
T
1000
GRAHAM & GRAHAM,
Agents for Applicant.
COMPLETE SPECIFICATION.
An Improved Method or Means for the Prevention of Accidents
from the Overheating of Electrical Wires.
I, JOHN BRADFORD of 3 Cumberland Terrace Regents Park London, Gentleman
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:
The object and purpose of this, my invention, is to effectually protect electrical
wires in such a mode or manner as to prevent accidents by the overheating of the
same. With this object in view, I insulate the wires in the usual method or way, and
enclose them in an ordinary metal pipe or tube of small diameter. This pipe or tube
I again enclose within another of larger diameter which 1 support or keep in position
by means of perforated discs of any suitable insulating material. The larger-and
external tube or pipe I place in direct communication with the water supply cistern
or any reservoir; from which cistern or reservoir the tube or pipe is filled. At,
preferably, the lowest point of the outer pipe, I affix or adjust a small tap for releasing
the air when filling said tube with water, or it may be used for emptying the external
pipe or tube of the liquid; if needed.
In order that my invention may be more readily understood and explained in detail,
1 have hereunto annexed a sheet of drawings on which letters of reference are marked
on all the corresponding parts on all the figures alike.
DESCRIPTION OF DRAWINGS.
Fig. 1. shews a longitudinal section of my invention, having all the necessary parts

page_text: Fig. 4. shews a transverse section of my apparatus.
a is the insulated electrical wire.
b is the internal pipe or tube further protecting a.
c is the external pipe or tube, to be filled with water from a water supply cistern or
reservoir.
d is the perforated disc to hold b and c in position.
e is the small tap for expelling air whilst c is being filled with water or for emptying
water from same if necessary.
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 improved means or method of protecting electrical wires to prevent accidents
accruing from the overheating of same, in manner as herein substantially described
set forth and illustrated on the drawings hereunto annexed.
Dated this 14th day of August 1890.
GRAHAM & GRAHAM,
Agents for Applicant.