Improvements in Electric Connections.
Year: 1893

page_text: Date of Application, 21st Feb., 1893
Complete Specification Left, 20th Nov., 1893-Accepted, 23rd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Electric Connections.
I, EDWARD WILLIAM LLOYD, late Commander in the Royal Navy, of The
Elswick Works, Newcastle-upon-Tyne, do hereby declare the nature of this inven-
tion to be as follows:-
An electric connection constructed according to this invention is of simple
construction, easy to fit together without the use of tools, and possesses the great
advantage of perfectly shielding the wire, at the same time as it secures it, more-
over when the connection is fitted together in its place, the electric cable is so firmly
held that the wire will shear before it will part from the connection. In somewhat
similar electric connections as formerly made a difficulty has been found in
preventing small pieces of broken wire from becoming detached and sometimes
short circuiting the current. This difficulty has been entirely overcome by my
invention, for the ends of the wires are completely enclosed.
To connect the end of the conductor of an insulated electric cable to the end of
another insulated conductor contained within a tube or casing I make the end of
this latter conductor to terminate within the casing at some short distance from
its end. Against the end of the conductor a small metallic or other conducting
contact piece is made to bear. A collar is formed around the forward end of the
contact piece. Surrounding the contact piece is a shield of insulating material
closely fitting to the collar and to the interior of the casing. Through the collar
a hole (or it might be holes) is bored obliquely from the centre of its rear end
to come out at the side just in rear of the collar.
The end of the casing is closed by a screw plug through a hole in the centre of
which the insulated cable is led.
To fit up this connection the screw plug and the insulating shield are first placed
on to the cable and part of the protection at the end of the cable is cut away, the
wire projecting from the cable may then be threaded through the hole in the stem
of the contact piece, divided into two parts, each part slightly twisted and coiled
around the stem of the contact piece in rear of the collar the insulating shield may
then be drawn on to the contact piece, care being taken before placing the con-
nection into the case that no wire is projecting up between the shield and the collar
when the connection has been placed into the case, the plug may be screwed up
hard against the rear end of the shield pressing the wire against the back of the
collar and the front face of the contact piece against the end of the conductor in
the casing.
If desirable the wire after being threaded through the hole in the contact piece
may be coiled around the stem in one strand.
In some cases the cable may have cord or wire wrapped around it near its end
to form a collar which may be made to lie in a recess in the screw plug with a view
to relieve the conducting wire of all strain and transferring it to the cable.
If desirable in place of the wrapping I may screw the insulated shield to the
contact piece.
The contact piece may if desired be made conical between the collar at its
front end and a smaller collar at its rear end.
The portion of the wire conductor which is laid bare at the end of the cable
may be divided into two or more parts and be led through notches in the rear
collar of the contact piece on to the coned portion.
The wires are then coiled around the conical part of the contact piece and the
shield drawn over them, taking care before placing the connection into the case
that no wire is projecting up between the shield and the front collar.
When the connection has been placed into the case and the screw plug is screwed

page_text: up hard against the shield pressure is put on the wire between the conical faces of
the contact piece and the shield, and the contact piece is pressed hard up against
the end of the conductor in the casing.
2000
EDWARD W. LLOYD.
COMPLETE SPECIFICATION.
Improvements in Electric Connections.
I, EDWARD WILLIAM LLOYD, late Commander in the Royal Navy, of The
Elswick Works, Newcastle-upon-Tyne, 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:—
An electric connection constructed according to this invention is of simple
construction, easy to fit together without the use of tools, and possesses the great
advantage of perfectly shielding the wire, at the same time as it secures it, moreover
when the connection is fitted together in its place, the electric cable is so firmly
held that the wire will shear before it will part from the connection.
In somewhat
similar electric connections as formerly made a difficulty has been found in
preventing small pieces of broken wire from becoming detached and sometimes short
circuiting the current. This difficulty has been entirely overcome by my invention,
for the ends of the wires are completely enclosed.
To connect the end of the conductor of an insulated electric cable to the end of
another insulated conductor contained within a tube or casing I make the end of
this latter conductor to terminate within the casing at some short distance from its
end. Against the end of the conductor a small metallic or other conducting contact
piece is made to bear. A collar is formed around the forward end of the contact
piece. Surrounding the contact piece is a shield of insulating material closely
fitting to the collar and to the interior of the casing. Through the collar a hole
(or it might be holes) is bored obliquely from the centre of its rear end to come out
at the side just in rear of the collar.
The end of the casing is closed by a screw plug through a hole in the centre of
which the insulated cable is led.
To fit up this connection the screw plug and the insulating shield are first placed
on to the cable and part of the protection at the end of the cable is cut away, the
wire projecting from the cable may then be threaded through the hole in-the stem
of the contact piece, divided into two parts, each part slightly twisted and coiled
around the stem of the contact piece in rear of the collar the insulating shield may
then be drawn on to the contact piece, care being taken before placing the
connection into the case that no wire is projecting up between the shield and the
collar when the connection has been placed into the case, the plug may be screwed
up hard against the rear end of the shield pressing the wire against the back of the
collar and the front face of the contact piece against the end of the conductor in
the casing.
If desirable the wire after being threaded through the hole in the contact piece
may be coiled around the stem in one strand.
In some cases the cable may have cord or wire wrapped around it near its end to
form a collar which may be made to be in a recess in the screw plug with a view to
relieve the conducting wire of all strain and transferring it to the cable.
If desirable in place of the wrapping I may screw the insulated shield to the
contact piece.
The contact piece may if desired be made conical between the collar at its front
end and a smaller collar at its rear end.
The portion of the wire conductor which is laid bare at the end of the cable may
be divided into two or more parts and be led through notches in the rear collar of
the contact piece on to the coned portion.

page_text: The wires are then coiled around the conical part of the contact piece and the
shield drawn over them, baking care before placing the connection into the
that no wire is projecting up between the shield and the front collar.
When the connection has been placed into the case and the screw plug is screwed
up hard against the shield pressure is put on the wire between the conical faces of
the contact piece and the shield, and the contact piece is pressed hard up against
the end of the conductor in the casing.
that no wire is projecting up between the shield and the front collar.
When the connection has been placed into the case and the screw plug is screwed
up hard against the shield pressure is put on the wire between the conical faces of
the contact piece and the shield, and the contact piece is pressed hard up against
the end of the conductor in the casing.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal section of the connection.
Figure 2 is a transverse section on the line X X Figure 1.
Figures 3 and 4 are views shewing separately the parts a and b Figure 1,
respectively.
Figure 5 shows the end of the electric cable prepared for the connection.
Figure 6 shows a modification in which the cable is wrapped.
Figure 7 shows another modification in which the part 6 is made conical.
Figures 8 and 9 are views shewing separately the parts a and b Figure 7,
respectively.
Figure 10 shows another modification in which the parts a and b are screwed
together.
In these figures a is the shield of insulating material. bis the contact piece of
conducting material in the stem of which is a hole coming out at 6' just under the
collar 6. c is a metal plug screwing into the metal tube h. e is a conductor in
contact with b. 9 is an insulating guard, d is the electric cable and d the
conducting wires in it.
In Figure 6 the cable is wrapped with wire; so as to relieve the conductor d'
from all strain. In Figures 7 to 9 the hole 61 is replaced by notches k in a flange
at the small end of the contact piece b.
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 contact piece to which the end of the conductor of the electric cable is
fixed substantially as described.
2. The combination of the shield a and contact piece b substantially as
described.
3. Electric connections substantially as described and shown in the drawings.
Dated this 3rd day of November 1893.
EDWARD W. LLOYD