Year: 1888

page_text: Date of Application, 23rd Apr., 1888
Complete Specification Left, 16th Jan., 1889
Complete Specification Accepted "6th Feb., 1889
I, RICHARD VON FISCHER TREUENFELD of 12 Queen Annes Gate Westminster in
the County of Middlesex Telegraph Engineer do hereby declare the nature of this
invention to be as follows:-
My invention has for its object to provide means for rapidly connecting and
disconnecting electrical conductors more particularly applicable to field telegraph and
other cables.
For this purpose I form the two ends of the conductors that are to be jointed
together with a tapering enlargement which may be conveniently formed by bending
over the ends of. the wire or wires and after soldering together the bend filing it to
the required tapering enlarged form.
These enlarged ends are then secured in correspondingly tapered holes in a metal
jointing piece or coupling which may be arranged in either of the two following ways.
According to one arrangement a solid metal block has two tapering passages formed
side by side right through it, the taper of the one passage being in the opposite
direction to that of the other. In opposite sides of the block are longitudinal slots
each leading from the outside into one of the passages and made of such a size that the
conductor can be passed laterally through them into the passage; these slots are
however formed in an oblique position relatively to the axis of the passage, so that
the conductor has to be passed in a correspondingly oblique position, and consequently
when it has passed in and has its conical end drawn tight into the conical passage it
cannot pass out laterally again through the slot.
When both ends have been thus introduced, the bared part of the conductor, in the
case of a cable, and the jointing piece are, when necessary, covered with suitable
insulating material.
According to the second modification the metal block is divided longitudinally into
two halves, each half having a tapering recess at each end for the reception of the
tapering ends of the conductors, so that when the two halves of the block are fitted
upon each other they are capable of enclosing the two ends of the conductors
between them
"

page_text: The two halves are so formed that when secured together longitudinally they'
present tapered split ends having a certain amount of spring action, and with tapering
recesses of sufficient size to allow of, the tapering enlarged ends of the conductor to
pass in and out of them.
Over these split ends are passed in opposite directions to each other two sleeves or
ferrules the meeting ends of which are formed with male and female screw thread, so
that on screwing them together they are drawn tight over the split ends of the
block, and are thus made to press them firmly on to the tapered ends of the
conductors.
נ.י.

page_text: I, RICHARD VON FISCHER TREUENFELD of 12. Queen Anne's Gate Westminster
in the County of Middlesex, Telegraph Engineer, 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 :-
My invention has for its object to provide means for rapidly connecting and
disconnecting electrical conductors, more particularly applicable to field-telegraph
and other cables.
For this purpose, I connect the ends of two conductors as I shall describe referring
to the accompanying drawings.
I form the end of each conductor with a tapering enlargement a as shewn in
Fig. 1, which may be formed by bending back the ends of the wires of which the
conductor consists soldering and then filing or otherwise finishing the thickened
part a to shape. Otherwise, as shewn in Figs. 2 and 3, a tapered metal sleeve b may
be put on the wires and a taper pin or wedge c driven in at the end to swell out the
conductor to fill the sleeve. The, metallic, connection may be secured by soldering.
The ends of the two conductors being thus swelled in taper form may be secured in
a socket piece such as is shewn in side view at Fig. 4 and in end view at Fig. 5. It
consists of a round piece of metal m through which are drilled longitudinally two
tapered holes d d side by side. A slot e is cut obliquely from the outside into each
of these holes, the slot being wide enough to allow the entrance of the bared parallel
part (Fig. 1) of the conductor. By each slot e a bared part fis introduced and
helically turned a little until. its axis comes into coincidence with that of the hole d,
whereupon the conductor is drawn backwards so as to bring its swelled.end a into the
hole d where it becomes firmly wedged. The exposed parts f.of the two conductors
and the socket piece m can then he covered with suitable insulating and protecting
material.
Instead of making the socket in one piece, it may be, as shewn in longitudinal
section, Fig. 6 and in end view Fig. 7, made in two halves g coned at each end, and
recessed to receive the swelled ends of the two conductors. The two halves are held
together embracing the two conductors by screws.h, but they are then firmly clamped
together by means of two screw union pieces k and embracing their taper ends.
Instead of making the clamp in two pieces g (Fig. 6) it may be made in one piece
as shewn in longitudinal section Fig. and end view Fig. 9. Here n is a round
piece of metal which at each end is tapered and is drilled up with a hole large enough
to admit the swelled end of the conductor; the taper parts are slit by two cross cuts
so as to form four segments so that on screwing up the union pieces k and the taper
ends of n are squeezed inwards firmly clamping the conductors.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
.1. For coupling two electrical conductors, the combination of a drilled and
obliquely slotted socket with the taper swelled ends of the conductors, substantially
as described.
2. In combination with the taper swelled ends of two conductors, a divided or slit
clamp having taper ends embraced by screw unions substantially as described with
reference to Figs. 6, 7, 8 and 9.