An Improved Cord Grip for Electric Light Fittings.
Year: 1896

page_text: Date of Application, 24th Mar., 1896
Complete Specification Left. 23rd Dec.. 1896-Accepted, 6th Mar., 1897
PROVISIONAL SPECIFICATION.
An Improved Cord Grip for Electric Light Fittings.
I, GEORGE OWEN DONOVAN 49 Hartismere Road Fulham London S.W.
Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object an improvement in cord grips for use in
connection with electric light fittings, lamp holders, ceiling roses, plugs, or shoes
or other apparatus, and can be used in all cases in which electric lamps or fittings
are suspended or attached to flexible wires.
The cord grip may be made in any suitable material such as wood, fibre,
vulcanite, brass, glass, or porcelain and can conveniently be of cylindrical
shape.
The cord grip can he screwed or tapped at one or both ends so as to secure it to
a lamp holder, ceiling rose or other electric fitting.
Holes or channels are drilled, formed or moulded from the ends, beginning near
the centre and gradually diverging from the axial line.
In one modification of my invention a section of the cord grip would show all
the holes in one plane (although they can all be quite conveniently in different
planes), the holes or channels on the one side of the centre line converging towards
the centre, and the holes or channels on the other side of the centre line converging
towards the centre.
Assuming the cord grip to be held with the axis vertical it is wired in the
following way, the wires are led through the top axial hole or holes each wire
being brought out through the side of the grip, they are then taken to the lower
holes leading to the centre and downward, and, after being threaded through are
then led to the connections which it is desired to protect.
Each wire in passing through the cord grip is bent four times and thus the
friction between the wire and the cord grip is so great as to obviate any strain on
the wires being communicated to the counections.
24th March 1896.
GEORGE OWEN DONOVAN.
An Improved Cord Grip Ior
GEORGE OWEN DONOVAN 49 Hartismere Road, Fulham S.W. London
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 :-
This invention has for its object an improvement in cord grips for use in
connection with electric light fittings, lamp holders, ceiling roses, plugs or shoes,

page_text: or other apparatus & can be used in all cases in which electric lamps or fittings are
suspended or attached to electric wires.
The cord grip may be made in any suitable material such as wood, fibre,
vulcanite, brass, glass or porcelain and can conveniently be of a cylindrical shape,
and can be screwed or tapped at one or both ends so as to secure it to a lampholder
ceiling rose or other electric light fitting.
Holes or channels are drilled formed or moulded from the ends beginning near
the centre and gradually diverging from the axial line.
In ore modification of my invention a section of the cord grip would show all the
holes in one plane (although they can quite conveniently be in different planes), the
holes or channels on the one side of the centre line converging towards the centre
-and the holes or channels on the other side of the centre line converging towards
the centre.
Assuming the cord grip to be held with the axis vertical it is wired in the
following way: The wires are led through the top axial hole or holes each wire
being brought out through the side of the grip they are then taken to the lower
holes leading to the centre and downward and after being threaded through are
led to the connections which it is desired to protect; each wire in passing through
the cord grip is beut four times, and thus the friction between the wires and the
cord grip is so great as to obviate any strain on the wires being communicated to
the connections.
In order to make my invention understood I will now proceed to describe the
same by reference to the accompanying drawings in which
Fig. 1 is a sectional elevation of a cord grip and lampholder base in which the
cord grip is constructed according to my improvements and the holes formed in
-different planes.
Fig. 2 is a plan showing the direction of the holes and
Fig. 3 is a sectional elevation of a wall plug with a cord grip constructed according
to my improvements in which the holes are all in one plane.
As shown in Figs. 1 & 2 the cord grip would be wired as follows: The wires
would be passed through the holes A & B respectively the wire from A then
being passed through the hole C & thence to the connections the wire from the
hole B being taken through the hole D & thence to the connections.
In Fig. 3 the cord grip would be wired by passing the wires through the
holes A & B respectively the wire from A then being taken through C & thence
to the connections & the wire from B being taken through D & thence to the
.connections.
Having now particularly described and ascertained the nature of my inven
tion and in what manner the same is to be performed I wish it to be understood
that I do not confine myself to the precise details herein laid down and shewn in
the drawings as the same may be varied without departing from the peculiar
character of my invention, but what I do claim is :
1. A cord grip in which the wires enter at the top and come out at the sides and
then re-enter and proceed to the connections as hereinbefore described and
represented in Figs. 1-2 & 3.
2. A cord grip in which the wires enter at the top and in which the holes are
in the same or different planes, as herein before described and represented in
Figs. 1-2 & 3.
GEORGE OWEN DONOVAN.