Improvements in Joint Boxes for Electric Cables.
Year: 1897

page_text: Date of Application, 22nd Oct.,
1907
Complete Specification I eft 22nd July 1898-Accepted 17th Sept. 1898
φαιν
Complete Specification Loft 22nd July 1898-Accepted 17th Sept. 1898
PROVISIONAL SPECIFICATION.
Improvements in Joint Boxes for Electric Cables.
I, JOHN SHIPP, of Helsby, near Warrington, Electrical Engineer, and THE TELE-
GRAPH MANUFACTURING COMPANY, LIMITED, of Helsby, near Warrington, in the
County of Cheshire, do hereby declare the nature of this invention to be as
follows:-
-
Hollow brass sockets, either with flanges or terminals, are provided to fit over
the braid or lead covering of a cable, or over the conductor. If over the lead, the
hollow brass socket is tinned internally, and then filled with an alloy of about
four parts of lead to one of tin, to make firm connection between the lead casing
and the hollow brass socket. If the cable is braided, the socket is filled
with an adhesive wax such as paraffin, resin and ozokerite mixed together. The
hollow sockets with terminals are tinned internally and filled with solder composed
of say equal parts of lead and tin, after being placed on the conductor. Where
the cables are concentric either with two or three conductors, and it is desired to
connect the outermost conductor to the case of the joint box, a portion of the
outermost conductor is laid bare, and enclosed within the mass of lead and tin
inside the hollow socket having a flange. This socket is then screwed to the joint box.
Where the service cables from such a system of concentric cables consist of two
single cables, one of them being connected to the case of the joint box, provision
is made for this by using a flanged hollow socket having a projecting lug cast in
one piece with the flange, this lug being bored to receive the conductor of that
cable which has to be joined to the case; the socket itself being used for the
insulated service cable.
Figs. 1 & 2 of the accompanying drawing illustrate a joint box having the
improvements mentioned.
at
"
Cable A" is a triple concentric feeder.
Cables "BB" are triple concentric distributing cables.
Cables "CCCC" and "DDDD" are branch single service cables.
Flanged hollow sockets are shown at "bb," and hollow sockets with terminals
<6
a a a.
"
A flanged hollow socket with lug for service cables is shewn at "c."
The terminals forming part of the hollow sockets fixed to conductors are shewn
at "jjj" and the special terminal needed for the service cable fitting in the
socket "c" is shewn at "i," fitting into a lug "h," while the lug for the service
cable which has to be connected to the case shewn at "g."
A
"
Fig. 1 shews how the outermost conductor of the triple concentric feeder
is placed inside the hollow socket "6" before the lead is poured into the socket.
The various terminals "i" "j" may be connected as required with fuses or
with connecting links.
Dhin Tantor first day of October 1897.

page_text: Improvements in Joint Boxes for Electric Cables..
We, JOHN SHIPP, of Helsby, near Warrington, Electrical Engineer, and THE
TELEGRAPH MANUFACTURING COMPANY LIMITED, of Helsby, near Warrington, in
the County of Cheshire, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:.
This invention relates to a cable socket flanged for attachment to the face of a
joint box or other support in such a manner that the connection between the
socket and the support can be made or broken without disturbing the connection
between the socket and the cable, which latter is effected by a metallic or other
filling received in the hollow interior of the socket, the filling serving also to
prevent the passage of fluid through the socket.
A socket of the kind above referred to is convenient for use in the connection
of a cable with a junction box, for example, where the cable has to extend through
the wall of the box, for by releasing the screws which secure the socket to the
exterior of the box, the cable can be drawn outward from the latter with the
socket retained upon it, the joint being readily remade by once more bolting the
flange of the socket up against the face of the joint box.
In the accompanying drawings
Fig. 1 is a plan of one construction of joint box provided with sockets according
to this invention.
Fig. 2 is a vertical section of the same on the line 2-2 of Fig. 1.
Like letters indicate like parts throughout the drawings.
A is a joint box shown by way of example as adapted to receive triple con-
centric cables B and single cables C. The cables are secured in sockets I) and I)¹
having flanges 12. They are attached to the face of the joint box A by means
of bolts E passing through the flanges D₁; thus the sockets D and D¹ may be
readily detached from the joint box A without disturbing the union between the
cable and the socket.
The sockets D) and D₁ are formed with a hollow body D3 which may have a boss
upon it adapted to receive a screw as at I)4. The cable is passed through the
socket as at D5 and the union between it and the socket is effected as at F by filling
the hollow body D³ with material suitable to the character of the exterior of that
portion of the cable within the socket. For example, if the lead covering of
the cable is within the socket the hollow body is tinned internally, and then filled
with an alloy of about four parts of lead, to one of tin to make firm connection
between the lead casing and the socket. If the cable is braided the hollow body
of the socket is filled with an adhesive wax, such as paraffin, resin and ozokerite
mixed together.
In the case of the socket I) the hollow body is bolted upon the outside of the
joint box A whereas in the form shown at D the body of the socket is within the
joint box, the flange D² however being external.
A lug or extension D6 is provided on the socket D¹ in order that if desired a
cable may be connected to the casing of the joint box A by joining it to the lug Do.
In the example illustrated, cables C are shown connected to the lugs D6 while
the cables C are insulated and pass through the socket D¹ without making electrical
connection with it, the cables C and C₁ in this case forming two-conductor con-
nection capable of being disconnected entirely by detaching the socket 1)¹.
Other sockets G are provided having terminals G₁ formed upon or fixed to them,
the conductors of the cables which pass through the sockets D and D¹ are joined

page_text: in the interior of the joint box A to the sockets G, the terminals G' forming
convenient means for connecting the various cables by means of fuses or otherwise
as may be desired.
The sockets G are also provided with a hollow body as at G2 and the conductor
is conveniently attached to the socket by tinning the interior of the hollow body G*
and then filling it with a solder composed of, say, equal parts of lead and tin.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
1. A cable socket such as D or D¹ flanged for attachment substantially as
described to the face of a joint box or other support for the purpose specified with
or without an extension such as 16.
2. The combination with a cable or other conductor of a flanged cable socket
such as D or D' with a filling of the kind described to suit the character of the
exterior of the cable received therein.
3. A cable socket such as G with a terminal such as G¹ upon it for the purpose
described.
4. The combination with a joint box or other support of the cable socket such
as D or D¹ substantially as described and illustrated in the accompanying
drawings.
Dated this 22nd day of July 1898.
JOHN SHIPP.
THE TELEGRAPH MANUFACTURING CO. LD.,
Per. J. BROTHERTON,
Secretary.