Improvements in Electrical Connecting Cords.
Year: 1896

page_text: Date of Application, 30th Dec., 1896-Accepted, 24th, Dec., 1897
COMPLETE SPECIFICATION.
Improvements in Electrical Connecting Cords.
I, CHARLES HUGH MCEVOY, of 104 Tenth street, city of Lowell, in the County
of Middlesex and Commonwealth of Massachusetts, one of the United States of
America, Manufacturer of Electric Conducting Cords, do hereby declare the nature
of this. invention and in what manner the same is to be performed, to be parti-
oularly described and ascertained in and by the following statement :-
This invention relates to electrical connecting cords, and consists in the devices
and combinations hereinafter described and claimed. Such electrical connecting
cords commonly consist of one or more, (usually, two or more) cores of tinsel-
covered thread, each core being separately covered by a flexible braided covering
and the core or cores together with a comparatively inextensible supporting cord,
being enclosed (except at their ends which project from said common covering) in
a common braided covering. Sometimes a helical spring is used for a core instead.
of the tinsel-covered threads.
The ends of the cores are secured, as by soldering, to tips of wire adapted to be
secured in binding posts in a well known manner, and the ends of the supporting
cord are intended to be tied about a binding post or to some other thing which is
stationary with respect to such post in such a manner as to keep the conducting"
cores slack and to prevent said cores being broken or separated from their tips.
But the duty of properly attaching the supporting cord is frequently so carelessly
performed as to leave the part of said supporting cord between its points of attach-
ment, longer than the cores, or said supporting cord is carelessly tied and becomes
accidentally untied or slips off.
The most common use of these conductors is to connect the receiver of a telephone
to binding posts of the magneto-electric call box, one end of the supporting cord
being usually tied into a screw-eye secured in said receiver. When 'the supporting
cord is slack, the continual bending of the conducting cores by the moving about
of the operator and the pulling of the connecting cord is liable to break the cores
away from the tips and dropping said receiver is almost certain to separate said
cores and tips.
I avoid all danger of such separation by providing means of attaching the
supporting cord at each end thereof, directly to a tip, so that the act of inserting
the tip in the binding-post attaches the supporting cord.
In the accompanying drawing, Fig. 1 is a front elevation of a part of a telephone
backboard with magneto-electric call-box, receiver and connecting cord provided
with my improvement; Fig. 2, a side elevation of a covered core, a tip and its
shell, partly in section to show a way of attaching the tip-wire to the core and
the link for the attachment of the supporting cord; Fig 3, a front elevation of
said tip-wire, its shell, the link and a covered core; Fig 4, a side elevation of the
parts shown in Fig 3, the link being attached to the shell of the tip, instead of to
the tip wire, as in Figs 1 and 2; Fig 5, a plan of a wire link with supporting
cord attached; Fig 6, a plan of a sheet metal link; Fig 7, a plan of a wire
link in which the eves lie in different planes.

page_text: The backboard A, magneto electric call box B, haud telephone or receiver C,
binding posts b c are all of any usual construction and operation.
The connecting-cord D, comprising covered cores d, and a supporting cord d
and common covering, d, is of substantially the common construction, except as
hereinafter stated.
The tip F, which may be connected to the conducting core d in any usual
manner, is represented in Fig 2, and is a metallic wire the pointed end f¹ of which
is inserted in the core d and then passed laterally out through the material of
the core to project outwardly through the wall of. the core and its covering and
turned up at on the outside of said core covering to prevent the tip being with-
drawn. A shell 3 surrounds the end of said, core and covering and is pinched
thereon or secured by a drop of solder in the well known manner to prevent the
end of the core and covering from fraying out.
I use a link or loop E, preferably a link of wire, as shown in Figs 25 with two
eyes e el, one, e, of which is placed over the tip-wire F against the shell f3 and
preferably soldered thereto and the other, c', of which eyes receives an end of the
supporting cord d which is knotted or tied outside of said eye, at to prevent
said end from being drawn out of said eye (Fig. 5), or the eye e may surround
the shell, part of the tip being laid in an annular groove fin said shell, as
shown in Fig. 4.
The eyes e e¹ of the wire link may lie in the same plane, as shown in Fig. 5, or
in planes at right angles with each other, as shown in Fig. 7.
A modified form E of said link is shown in Fig. 6, the same being punched
out of sheet-metal and having eyes e e¹ punched therein.
Having now particularly described and ascertained the nature of said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. A flexible electric conductor, comprising a conducting core, a 'conducting
tip in electrical connection with said core, a non-conducting supporting cord
and a link, arranged to surround said tip and to receive said supporting cord.
2. A flexible electric conductor, comprising a conducting core, a conducting
tip having a pin in electrical connection with said core and having a shell, a
non-conducting supporting cord and a link, arranged to surround the pin of said
tip and to receive said supporting cord.
3. A flexible electric conductor, comprising a conducting core, a conducting
tip in electrical connection with said core, a non-conducting supporting cord and
a link having two eyes, one of which surrounds said tip and the other of which
receives said supporting cord:
Dated this 30th day of Decembr
CHARLES HUGH MCEVOY,
By Herbert Haddan & Co
Agents to Applicant
18. Buckingham St., Strand London W.C.