Improvements in Electrical Conductors; and Joints therefor:
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in Electrical Conductors; and Joints therefor:
I, JOHN CHARLES BOND ANDREWS of 12 Batoum Gardens, Brook Green,
London, W., Gentleman, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvement in the construction of conductors of
electricity, especially for electric lighting and the insulation and protection
thereof. I arrange the lead and return conductors with insulating materials
between as a compact combination, one form of which consists of a wire conductor
suitably coated with insulation, which I cover with a conductor in tubular form
preferably obtained by drawing the insulated conductor and a strip of metal
together through a die, which causes the strip to close round the insulated
conductor. If it is required that the tube should be watertight, several tubes may
be formed on in the same way, each one arranged to hide the seam of the other
or the one strip may be broad enough to overlap. These tubes may be soldered
together by passing through molten metal, or by sufficient heat being applied,
the strip having been previously prepared for soldering in the known way.
Instead of forming this tubular conductor from strip, I. sometimes electro plate
the insulated conductor: and in order to increase the malleability and tensile
strength, I do the electro plating, in successive layers, each layer being burnished
by passing through a die, or by rubbing with special tools, such as wheel
burnishers, while the wire is taking a longitudinal course.
As insulation I prefer to use asbestos which may be formed on from the pulp by
passing the wire through it and finishing with a die, or by applying strips in the
same way as the conductive tube is formed. The formation of this insulating tube
will be facilitated by the application of a moist sponge, or article having similar
qualities:-oil or other suitable moisture may be employed. The insulated
conductor may then with advantage be well dried, and passed between pressing
rollers or through a die.
'
According to another form of my compact conductor, I make both conductors of
the strip form placed face to face with insulating material between them. In
this form of the conductors it is found desirable to increase their pliability.and. I
obtain this by forming a series of indents or transverse corrugations on the strip;
or I construct the strip of wires laid together in any suitable manner. I bind the
strip together by an outer insulation; and I sometimes cover the whole with a flat
tube formed of metal as previously described in connection with the cylindrical
conductors.
I construct the joints between lengths or branches of the the tubular form of my
conductor by soldering the inner conductors together. I then apply the insulation,
and make good the outer condnotor by fitting on a sheath or coupling formed,
either in two halves, or in one piece lapped round, provided with webs through
which to pass a screw or rivet for fixing. The whole may then be soldered
together in any known manner.
This Tea J__
....
4.J..

page_text: '
1
Improvements in Electrical Conductors, and Joints therefor.
JOHN CHARLES BOND ANDREWS Gentleniau. 45. Fulham Park Gardens-
Fulham London S.W. late of 12 Batoum Gardens, W. do hereby declare the
nature of this invention and in. what manner the saine is to be, performed, to
be particularly described and ascertained in and by the following stutement:-
My invention relates to improvements in the construction. of conductors of
electricity especially for electric lighting and to the insulation and protection
thereof. arrange the lead and return conductors with insulating materials
between them as a compact combination, which consists of a wire conductor
Fig: 1 & 2 suitably coated with insulations, which cover with a conductor ST
in tubular form preferably obtained by drawing the insulated conductor and.a
strip of metal Gtogether through a die, which causes the strip to close round the
insulated conductor: If it is required that the tube should be watertight, several
tubes may be formed on in the same way, each one arranged to hide the seam of
the other S&T Fig. 2.or the one strip may be broad enough to overlap. These
tubes may be soldered together liy passing through molten metal, or by sufficient
beat being applied the strips having been previously prepared for soldering in the
known way.
Instead of forming this tubular conductor from strip I sometimes electro plate
the insulated conductor; and in order to increase the malleability and tensile..
strength do the electro plating in successive layers, each layer being burnished
by passing through a dic, or by rubbing with special tools, such as: wheel
burnishers, while the wire is taking a longitudinal course.
As insulation I prefer to use asbestos which may be formed.on from the pulp, by
passing the wire through it and finishing with a die, or by applying strips in the same
way as the conductive tube is formed. The formation, of this insulating tube will
be facilitated by the application of a moist sponge, or article having similar
qualities-oil or other suitable moisture may be employed. Tho insulated
conductor may then with advantage be well dried,, and passed between pressing
rollers or through a die.
,"
According to another form of my compact conductor I make both con-
ductors CCFig. 3 of the strip form placed face to face, with insulating material. I
'between them. In.this. form of the conductors it is found desirable to, increase
their pliability and I obtain this by forming a series. of indents or transverse
corrugations on the strip; or 1 construct the strip, of wires laid, together in any
suitable manner.
I bind the strip together by an outer insulation T Fig. 3;. and
I sometimes cover the whole with a. Hat tubo formed of metal. S as previously
described in connection with the cylindrical conductors.
I construct the joints between, lengths or brauches of the tubular form of my
conductor by soldering the inner conductors C Fig. 4 together. I then apply the
insulation, and make good the outer conductor, by fitting on a sheath, or coupling
formed, either in two halves,. or in one piece S, Figs. 4. and. 5 Japped, round,
provided with webs W. through which to pass. a screw R or rivet for fixing. The
whole may then be soldered together in any known,manner.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare' that what
I claim is :
1st. The construction of a metal tube formed over an insulated conductor by
passing the insulated conductor and a strip or strips of metal through a die or
dies substantially as described and shown in the accompanying Figures 1 and 2.

page_text: 2nd. The construction of a watertight conductive tube formed of strips of
metal prepared on an insulated conductor as described and passed through heat
or molten metal. The strip having previously been prepared for soldering.
3rd. The construction of a conductive tube over an insulated conductor by
electrically depositing metal upon it as described.
an insulated
5th. The copstruction of the insulating material of an electric wire from asbestos
pulp substantially as described.
4th. Rendering an electrically deposited conductive tube on
conductor more malleable by burnishing and depositing successive layers:
6th. The construction of the insulating material for an electric wire or wires of
strips of asbestos formed into tubes round the wire by dies substantially as
described:
7th. The combination of a conductor insulated with asbestos and an enveloping
conductive tube of copper.
8th. The compact electric conductor formed of metal strips or braid face to
face and surrounded with an insulating envelope as described and shown in
Figure 3.
9th The construction of the joint shown in Figures 4 and 5 and described.
16th August 1895.
J. C. BOND ANDREWS
(Ordinary signature)
BOND ANDREWS.