Insulating Blocks for Use with Casings Containing Electric Wires.
Year: 1889

page_text: Date of Application, 12th Jan., 1889
Complete Specification Left. 28th Aug., 1889-Accepted, 5th Oct., 1889
PROVISIONAL SPECIFICATION.
Insulating Blocks for Use with Casings Containing Electric Wires.
1, FREDERICK BATHURST of 111, King Henry's Hampstead in the County of
Middlesex, Electrical Engineer, do hereby declare the nature of this invention to be
as follows:-
The object of this invention is to facilitate the junction of branch wires carrying
electricity with main wires, or similar purposes, in respect to the casing by which
these wires are for protection usually surrounded and to ensure that the safe and
predetermined distance between the positive and negative leads be maintained
throughout the electrical installation.
In effecting this purpose I mount on the casings at the point of junction (between
the casing containing the main wires and that containing the branch wires) a block,
preferably semicircular, of wood or other suitable insulating material of the same
width as the branch casing and having grooves upon its surface preferably of the
same size and distance apart as those in the branch casing.
The position and size of this block is such that the grooves at one end coincide with
the further groove in the main casing and the grooves at the other end exactly
coincide with the grooves in the branch casing, so that one of the branch wires may
pass over this block in one of the grooves joining the further main wire and the other
branch wire may preferably pass under this block and join the other main wire thus
making the requisite connections for the circuit ;the block having such a radius that
the branch passing over it is maintained throughout its course at a certain safe and
predetermined distance (generally the width of the fillet of the casing) from the main
wire of opposite sign which passes beneath the block.
A suitable cover may be fitted to these blocks to conceal the wires.
By using these blocks the main casing and wires may be erected without making
provision as to the position of the branches and these branches may be inserted
where convenient.
For the purpose of protecting the branch wires from excess of electricity I may
combine with the insulating block as described a suitable fuse or cut out.
Tat this 10th day of I 1900
FREDERICK BATHURST
COMPLETE SPECIFICATION.
Insulating Blocks for Use with Casings Containing Electric Wires.
I FREDERICK BATHURST of 111 King Henry's Road London in the County of
Middlesex 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
ascertained in and by the following statement :--
The object of this invention is to facilitate the junction of branch wires with the
main leads in an Electric system for distribution of Electricity and to ensure that a
proper and safe distance be maintained between wires of different polarity at their
points of crossing. The block can also be arranged to hold or contain a safety fuse if
required for protecting the branch wires from excess of current.
In effecting this purpose I mount on the casing over the point of junction (of the
casing containing the main wires and that containing the branch ditto) a block
(preferably semicircular) of wood, china, or other suitable insulating material, which
is usually of the same width as the branch casing. This block has grooves or other
channels, on its surface (preferably of the same size & distance apart as those in the
branch casing) arranged so that the branch wire or wires may be conveniently carried

page_text: at a predetermined distance apart. One main wire may pass under the block whilst
the branch wire of opposite sign is at the same time kept at any required distance
from it by being passed over the block. To better illustrate my invention I refer to
the accompanying drawings, each corresponding part in all figures being denoted by
a similar letter. The body of the block A (preferably made simicircular) is usually
bounded on either side by a raised portion B, B¹ which may serve as a support for a
cover, or the block may have a groove in it as shown at G in Fig. 4. In Figs. 5 & 6
a block is shown in which the groove is arranged in two parts with fixing plates D, DI
for the insertion of a fuse F in the branch wire. Fig. 5 also shows a method of fixing
the block. The main casing being denoted as M. C. and the branch ditto B. C. The
main lead M L and branch lead B. L. A suitable cover may be fitted to the block to
protect and conceal the wires if required. By using these blocks the main casing and
wires, may be erected without making provision as to the position of the branches the
blocks enabling these to be inserted where most convenient without disturbing the
main casing &c. to any extent.
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. The application of a block such as described as and for the purpose set forth.
2. The insertion of a fuse carrying arrangement in a block such as described and
illustrated.