Improvements in Casings, Beadings, and Mouldings for Containing, Covering, and Insulating Electric Wires for Lighting or other purposes.
Year: 1890

page_text: Date of Application, 15th Feb., 1890
Complete Specification Left, 17th Nov., 1890-Accepted, 17th Jan., 1891
PROVISIONAL NIEUITIVATION.
Improvements in Casings, Beadings, and Mouldings for Containing,
Covering, and Insulating Electric Wires for Lighting or other
purposes.
t
We, WALTER GRITTEN, and ARTHUR PARMLEY, both of High Street, Notting Hill
in the County of Middlesex, Engineers, do hereby declare the nature of this inven-
tion to be as follows:-
-
This invention relates to the casings, beadings, and mouldings, used for containing
the insulated wires used in houses and other places for electric lighting or other
purposes.
Such casings have ordinarily heretofore been made of wood, and have been liable to
the objection that they are not incombustible and are easily liable to injury, and the
present invention has for its object a novel method of and materials for making such
casings so that they are absolutely incombustible, inexpensive, durable, and can be
readily rendered as ornamental as desired.
For this purpose we make strips of sufficient length, and preferably rectangular in
section of a composition consisting of plaster, cement of any suitable kind, clay, or
other substance of the like kind, with which is incorporated what is well known as
silicate cotton or slag wool, fibres of asbestos or the like fibrous incombustible material,
non conducting electricity.
This composition is made into strips of suitable length, which may be straight or
curved to suit the position in which they are to be used, by pressure in presses, rolling,
or other equivalent means, one or more longitudinal grooves or channels being made
along one or more of the sides of the strip to receive the electrical conducting wires
in the usual way. These grooves or channels are preferably made in the outer face or
surface of the strip, and a corresponding strip of similar material may be used to cover
the grooves and insulated wires, such covering strip. being held in its place by screws
or equivalent means, and its outer surface being made as ornamental as may be
desired. The proportion of silicate cotton or slagwool, or asbestos fibre, may be
varied more or less as may be found desirable, aud in some cases it may be omitted
altogether.
The strips containing the insulated wires are screwed or otherwise fixed in the
position which they are to occupy, and in order to give them greater strength we
sometimes insert into their substance during the process of manufacture, one or more
metallic or other wires or rods, or strings or cords or strips. Or a strip of canvas or
other strengthening material may be applied and fixed to the back or to the sides of
the strips of non-conducting and incombustible material.
Casings for electrical conducting wires constructed according to our invention are
incombustible, durable, inexpensive, very effective, and can be made of ornamental
appearance..
.' :שים
15th dow of Kohruary 1890
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Casings, Beadings, and Mouldings for Containing,
Covering, and Insulating Electric Wires for Lighting or other
purposes.
We, WALTER GRITTEN, and ARTHUR PARMLEY, both of High Street, Notting Hill,
in the County of Middlesex, Engineers, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, and accompanying drawing that
is to say:
This invention relates to casings beadings and mouldings used for containing the
insulated wires used in dwelling houses and other places for carrying currents of
electricity for lighting or other purposes.
Such casings have ordinarily heretofore been made of wood, and they have been
liable to the objection that they are not incombustible and are easily liable to injury,
and the present invention has for its object a novel method of and materials for making
such casings so that they are absolutely incombustible, inexpensive, and durable, and
can be readily rendered as ornamental as desired.
For this purpose we make strips of sufficient length, and preferably rectangular in
section of a composition consisting of plaster, cement of any suitable kind, clay, or
-other substance of the like kind, with which is incorporated what is well known as
silicate cotton or slag wool, fibres of asbestos, or the like fibrous incombustible material,
non-conducting of electricity.
:
This composition is made into strips of suitable length which may be straight or
curved to suit the position in which they are to be used, by pressure in presses,
rolling, or other equivalent means, one or more longitudinal grooves or channels
being made along one or more of the sides of the strip to receive the electrical con-
ducting wires in the usual way. These grooves or channels are preferably made in
the outer face or surface of the strip, and a corresponding strip of similar material may
be used to cover the grooves and insulated wires, such covering strip being held in its
place by screws or equivalent means, and its outer surface being made as ornamental
as may be desired. We do not confine ourselves to any particular proportion of
silicate cotton or slag wool or asbestos fibre, which may be varied more or less as may
be found desirable. A mixture of about two-thirds of the composition with one-third
of the fibre forins an effective compound.
In some cases it may be omitted altogether.
The strips containing the insulated wires are screwed or otherwise fixed in the
position which they are to occupy and in order to give them greater strength we
sometimes insert into their substance during the process of manufacture, one or more
metallic or other wires or rods, or strings or cords or strips of canvas or other suitable
material. Or a strip of canvas or other strengthening material may be applied and
fixed to the back or to the sides of the strips of non-conducting and incombustible
material.
$
The accompanying drawing which is in illustration of our invention, represents a
cross section of a strip with its cover. a is the strip composed of the material
described. b, b, are grooves or recesses to receive the insulated conducting wires c, c,
and d is the covering strip fixed by screws e. Wires f, f, are shewn inserted in the
body of the composition.
We do not confine ourselves to any particular size, shape, or proportions of the
strips, which may be varied as may be found desirable according to the circumstances
and conditions in which they are to be used.
Casings for electrical conducting wires constructed according to our invention
are incombustible, durable, inexpensive very effective, and can be made of ornamental
appearance.

page_text: Having now particularly described and ascertained the nature of our said inven-.
tion and in what manner the same is to be performed, we declare that what we
claim is
1. Casings, beadings, or mouldings, manufactured of the materials described, and
having grooves or channels, to receive electrical conducting wires, substantially as
described and shewn.
2. In combination with such casings, headings, or mouldings, the strips, covering
the grooves or channels, substantially as described and shewn.
Doted thin 15th do of Naumber 1800
EDWARDS & Co.,
35, Southampton Buildings, Chancery Lane, London,
Agents for the Applicants.