Improvements in or connected with Connecting Devices for Electric Conductors.
Year: 1899

page_text: Date of Application, 28th Apr., 1899
Complete Specification Left. 29th Jan., 1900-Accepted, 17th Mar., 1900
PROVISIONAL DEVIFICATION.
Improvements in or connected with Connecting Devices for Electric
Conductors.
We, HENRY REASON, Electrical Engineer, and THE MUTUAL ELECTRIC TRUST
LIMITED, both of 111, Glo'ster Road, Brighton, in the County of Sussex, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in or connected with connecting devices
for electric conductors and it is specially applicable in the case of concentric
conductors.
In carrying our invention into effect we take a cup or box of cast iron or other
suitable material having at the bottom or one end thereof an opening or passage
way and through this passage way we lead the main or service cable, closing it
tightly within the said opening or passage way by means of packing or in other
of the well known ways. At a point within the said cup or box we cut away
the insulation from the outer conductor (we shall assume that we are dealing in
this case with a concentric cable of two conductors) and we affix upon the outer
conductor a conducting collar from which a projection or branch conductor extends
laterally and outwardly from the said collar.
Before the said projection or conductor emerges however from the cup or box
a sleeve is passed over it so that the proximate end of the said sleeve projects
into the cup or box.
On the other side of the said collar the outer conductor is cut away and the
inner conductor (with or without its insulating covering) is led outwards from
the cup or box and over it is slid another sleeve which may be similar to that
first mentioned.
The said cup or box is now filled with resinous, bituminous or other convenient
insulating compound, in such manner that the proximate ends of the sleeves
herein before mentioned, that is to say the ends which penetrate into the cup or
box, are covered by, or immersed in, the said insulating material.
For purposes of distinction we shall term the said cup or box the chalice.
It will now be seen that from the chalice we have two sleeves projecting, each
containing a conductor, one of them being a continuation of the inner concen-
tric conductor, and the other a continuation of the outer concentric conductor.
We now pass the outer ends of the said sleeves with their conductors each into
a separate fuse box, of cast iron porcelain or other material, and we pack or close
up the orifices or passage ways of the said fuse boxes through which the sleeves
enter, in any of the well known ways.
Each conductor now has a separate fuse box to itself and we now deal with
the conductors in any of the usual ways employed in the case of fuse boxes. For
example, we may take the ends of the conductors projecting beyond the sleeves
to binding screws, with which the fuses are in connection.
It will be seen that by means of our invention safety is obtained and that
chances of arcing between the conductors are obviated.
In the case of three concentric conductors we proceed in a similar manner. In
this case each of the tubular conductors has a collar and laterally extending pro-

page_text: jection or conductor and that there are therefore three sleeves projecting from
the chalice, each with its enclosed conductor, and three fuse boxes into which the
said conductors are led.
Deted th: 90th dess of A 1000
the Applicants,
J. G. LORRAIN, M.I.E.E., &c.,
Norfolk House, Norfolk Street, London W.C.,
Chartered Patent Agent.
12
Improvements in or connected with Connecting Devices for Electric
Conductors.
We, HENRY REASON, Electrical Engineer, and THE MUTUAL ELECTRIC TRUST
LIMITED, both of 111, Glo'ster Road, Brighton, in the County of Sussex, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:--
This invention relates to improvements in or connected with connecting devices
for electric conductors and it is specially applicable in the case of concentric
conductors.
In order that our invention may be more readily understood we have appended
hereto certain drawings, of which
Figure I is a plan of the device hereinafter termed a chalice of a suitable form
for an ordinary concentric conductor cable.
Figure II is a section thereof on the line of Figure I and showing partly
in section and partly in elevation certain devices within the said chalice.
Figure III illustrates in clevation a form of chalice adapted for a concentric
three-wire cable.
Figure IV is a detail.
Referring now to these drawings we take, in order to carry our invention into
effect a cup or box 1, (hereinafter termed the chalice) of cast iron or other suit-
able material having at one end or the bottom thereof an opening or passage
way 2, and through this passage way we lead the main or service cable 3, closing
it tightly within the said opening or passage way by means of packing 4, or in
other of the well known ways. At a point 5 within the said chalice we cut away
the insulation 6, from the outer conductor 7, (we shall assume that we are dealing
in this case with a concentric cable of two conductors) and we affix upon the outer
conductor a conducting collar S, from which a projection 9, or branch conductor
extends laterally and outwardly from the said collar.
Before the said projection or conductor emerges however from the chalice a
sleeve 10, is passed over it so that the proximate end of the said sleeve projects
into the chalice.
On the other side of the said collar say at the part 11, the outer conductor is
cut away and the inner conductor 12, (with or without its insulating covering 13,)
is led outwards from the chalice and over it is slid another sleeve 10 which may
be similar to that first mentioned.
The said chalice is now filled with resinous, bituminous or other convenient
insulating compound 14, in such manner that the proximate ends of the sleeves
herein before mentioned, that is to say the ends which penetrate into the chalice
are covered by, or immersed in, the said insulating material.
It will now be seen that from the chalice we have two sleeves 10 and 10° pro-
jecting, each containing a conductor, one of them being a continuation of the
inner concentric conductor, and the other a continuation of the outer concentric
conductor.

page_text: We now pass the outer ends of the said sleeves with their conductors each
into a separate fuse box 15, of cast iron, porcelain or other material and we pack
or close up the orifices or passage-ways of the said fuse boxes through which the
sleeves enter, in any of the well known ways.
Each conductor now has a separate fuse box to itself and we now deal with the
conductors in any of the usual ways employed in the case of fuse boxes. For
example, we may take the ends of the conductors projecting beyond the sleeves
to binding screws, terminal plates or the like 16, with which the fuses 17 are in
connection.
In
In the case of three concentric conductors we proceed in a similar manner.
this case each of the tubular conductors has a collar and laterally extending pro-
jection or conductor and there are therefore three sleeves 10, 10, 10 projecting
from the chalice, each with its enclosed conductor, and three fuse boxes into which
the said conductors are led.
Such an arrangement is shown in Figure III. In this case the branches from
the two tubular conductors extend one to each side whilst the central one passes
out at the centre.
In Figure IV, I show a preferable way of joining up a tubular conductor. In
this case the outer conductor 7 is passed over the lower conical end 18 of a metal
sleeve, on whose upper cylindrical end 19 is cut a male thread adapted to engage
the female thread of a nut 20 which when screwed down holds the conducting
collar 21 (corresponding with the conducting collar 8 hereinbefore mentioned)
down so as to securely clamp the outer conductor 7 between it (collar 21) and the
conical part 18 of the sleeve as shown. This sleeve being passed over the insula-
tion 13 is insulated from the central conductor. Instead of the conducting
collar 21 bearing a projection extending laterally and outwardly from the chalice
it bears a lateral socket 22 in which is fitted a short length' of cable (insulated if
desired except where it fits the socket 22), passing from the said socket through
the sleeve 10 to the fuse box as before mentioned.
It will be obvious that the mere details of construction of our invention may
be modified to a considerable extent without departing from the spirit thereof.
It will be seen that by means of our invention great safety is obtained and that
it is impossible for a short circuit to take place within the fuse boxes whereas if
a single box were employed of the usual kind to contain both a sealing chamber
and fuses, a short circuit through the box, usually of iron, might be serious.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:
1. A chalice substantially as and for the purpose set forth.
2. The combination of a chalice, two or more fuse boxes and conductors pass-
ing from the said chalice to the fuse boxes substantially as set forth.
3. The combination with the parts mentioned in Claim 2 of sleeves surrounding
the said conductors and passing from within the chalice to within the fuse boxes.
4. The improvement in or connected with connecting devices for electric con-
ductors which comprises a concentric cable, a chalice within which the conductors
of the said cable are separated, a conducting collar or collars for the tubular
conductors of the said cable, and projections extending from the said conducting
collars, substantially as and for the purpose set forth.
Dated this 97th dar of Tann 1900
For the Applicants.
J. G. LORRAIN, M.I.E.E., &c.,
Norfolk House, Victoria Embankment, London, W.C.,
Chartered Patent. Agent.