Improvements in the Method of Wiring for Electric Lighting and other purposes.
Year: 1891

page_text: Date of Application, 27th May, 1891
Complete Specification Left, 27th Feb., 1892-Accepted, 2nd Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Method of Wiring for Electric Lighting and
other purposes.
We WILLIAM BROWN SISLING Electrical Engineer of Gothic Works King
Street Norwich & WILLIAM HARDING SCOTT Electrical Engineer of Gothic
Works King Street Norwich & LAURENCE SCOTT & Co. LIMITED Electrical
Engineers also of Gothic Works King Street Norwich do hereby declare the nature
of this invention to be as follows:-
In order to protect & encase the insulated wires or cables we use metallic casing,
which we prefer to make in two parts for convenience of fixing & inserting
the wires.
In one arrangement we may have a shallow metal trough just large enough to
hold the wire or cable, & we may place over this a similar trough fitting tightly
over the first trough & the whole may be secured when necessary by means of
saddles, staples or other convenient means.
In another arrangement the first trough containing the wires or cables may be
covered by a tightly fitting flanged trough cover which may be secured in position by
pins or screws inserted through holes in the flanges into the supporting wall or the
like along which the wires are run.
It is obvious that this arrangement may be varied in several ways, as for instance
the first trough containing the wire or cable may be with or without flanges & may
be recessed into the wall or other support and the covering may consist of a flat
strip of metal secured by pins, screws or other convenient means.
Instead of the first trough containing the wires or cables we may employ a strip
of sheet metal having small tongues punched up at intervals in such a manner that
the wires or cables may be fixed in position by bending these small tongues over
them, the holes left may be. covered by small pieces of metal soldered on at the
back of the perforated strip, or instead of perforating the back strip small tongues
of thin metal may be attached in any suitable manner. The outside covering may
then be placed over the wire or cable & secured by pins, screws or any convenient
means. We should make bends, tees & elbows suitable for the style of casing
employed in stampings of sheet metal or castings.
The object of this invention is not only to provide a neat, convenient & inexpensive
method of encasing & protecting electric light & other insulated wires or cables,
but also to obviate fire risks, the metallic casing localising & confining the effect
of any leakage which may occur, so that in practice a small leak could not persist
but would develop to such an extent as to make the cut-out (fusible or otherwise)
operate to disconnect the branch without doing any damage outside the casing.
We prefer to make the casing of metal which has a high fusing point, such as
iron or steel, which may be galvanised or otherwise coated or prepared.
Do this ofth day of N 1001

page_text: COMPLETE SPECIFICATION.
Improvements in the Method of Wiring for Electric Lighting and.
other purposes.
We WILLIAM BROWN SISLING, William HardING SCOTT and LAURENCE:
SCOTT AND COMPANY LIMITED all Electrical Engineers and all of Gothic Works,
King Street Norwich, 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:-
In order to protect and encase the insulated wires or cables we use metallic
casing in two or more parts for convenience of fixing and inserting the wires.
In one arrangement, as shewn in Fig. 5, we have a shallow metal trough just
large enough to hold the wires or cables, and after the wires or cables are in position
we place over this a similar trough fitting over the first trough and secure the whole
in position (as for instance to the wall or ceiling) by means of saddles, staples or
other convenient means.
In another arrangement the first trough containing the wires or cables may be
covered by a flanged trough cover, which may be secured in position by pins or
screws inserted through holes in the flanges into the supporting wall or the like
along which the wires are run as shewn in Fig. 6, or by making the casing extra
wide and bending it over the flanges of cover as shewn in Figs. 3 & 4.
It is obvious that this arrangement may be varied in several ways, as for instance
the first trough containing the wire or cable may be recessed into the wall or other
support, as shewn in Fig. 7, and the covering may consist of a flat strip of metal
secured by pins, screws or other convenient means:
Instead of the first trough containing the wires or cables we may employ a strip
of sheet metal having small strips or tongues attached at intervals, as shewn in
Fig. 4 at A & B, in such a manner that the wires or cables may be fixed in position,
before the covering is put on, by bending these small tongues over them. These
small strips may be attached to the inside of the casing by soldering, riveting or
other convenient means, or the small strips may be threaded through fine slits in
the back of the casing, as shewn in Fig. 4, and the holes thus left in the casing may
be closed by soldering or other convenient means. Instead of attaching separate
strips or tongues they may be punched up from the back strip and the holes thus
made may be covered by small pieces of metal soldered or otherwise attached to
the back of the casing.
When the wires have been fixed in position upon the flat casing by means of the
small strips as aforesaid, the outside covering may be placed over the wires or
cables and secured in position by means of pins, screws or other convenient means.
We make bends, tees & elbows, as shewn in Figs. 1, 2 and 5^, suitable for the style
of casing employed. These bends, tees & elbows may be stamped from sheet metal
or may consist of castings.
The object of this invention is to provide a neat, convenient & inexpensive method
of encasing & protecting electric light & other insulated wires or cables in such
manner as to obviate risk of fire from any possible defect in the insulation or
continuity of the wires or cables, the metallic casing localising and confining the
effect of any leakage which may occur, so that in practice small leak could not
persist but would develop to such an extent as to make the cutout, (fusible or
otherwise) operate to disconnect the branch without doing any damage outside
the casing.
We prefer to make the casing of metal which has a high fusing point, such as
iron or steel, which may be galvanised or otherwise coated or prepared; and to
connect the casing to earth efficiently at one or more points.

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. The use with insulated electric wires and cables of metallic casing, consisting
of trough & cover, or flat strip and trough cover, the trough being with or without
flanges substantially as described.
No text detected.