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Патент USA US2137162

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Nov. 15, 1938.
c, .__ HlLE
ELECTRIC
‘
CONTACT PLUG
.
2,137,162 '
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I
Filed June 3, 1957
' 3mm
‘ ('kdrlasljfzie ,
Patented Nov. 15, 1938
2,137,162
PP-lUNI'TED STATES PATENT OFFICE ~
2,127,162
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'
ELECTRIC CONTACT PLUG
Charles L. Hile, ‘Louisville, ‘Ky.
Application June 3, 1937, Serial No. 146,280
2 Claims. (01. 173-322)
This invention relates to certain new and useful
improvements in electric contact plugs.
The primary object of the invention is to pro
vide an electric contact plug having a device as
5 sociated therewith for relieving pulling strains on
p the conductor wires and intended for use in lieu
of the usual plug puller.
A further object of the invention is to provide.
an electric contact plug of the foregoing character
10 wherein a strain reliever for the conductor wires
in the form of a barrel or tube extends transverse
ly of and is swiveled in the inner end of the con
tact plug and through'which barrel or tube, the
conductor wires from the terminal within the
15 plug extend in opposite directions for increasing
frictional contact between the conductor wires
within the barrel or tube for relieving strain on
the conductor wires at their points of connection
with the terminals within the plug during the
20 pulling of the plug.
,
With the above and other objects in view that
will become apparent as the nature of the in
vention is better understood, the same consists in
the novel form, combination and arrangement
25 of parts hereinafter more fully described, shown
in the accompanying drawing and claimed.
In the drawing:
Figure 1 is a plan view of the electric contact
plug constructed in accordance with the present
30 invention and showing a barrel or tubular mem
ber extending transversely of the inner end'of
the plug and through which the conductor wires
from the plug extend in opposite directions ;'
Figure 2 is a side elevational view;
35
Figure 3 is an inside face view of one of the
contact plug sections with the barrel or tube
guide for the conductor wires shown in section;
Figure 4 is an inner end elevational view of the
plug;
40
7
'
Figure 5 is a detail sectional view taken on line
5-5 of Figure 1, showing the strap‘ support for
the barrel or tube swiveled in the inner end of
the contact plug; and
Figure 6 is a perspective view of ‘the conductor
45 wire barrel or tubular member with the holder
therefor.
The electric contact plug is of the usual typev
including a pair of mating sections I0 housing the
terminals and inner ends of the conductor wires,
50 the inner face of each section III being recessed,
notched and grooved for seating the terminals
II that have the inner ends of conductor wires
I2 and I3 anchored to the terminals II as at I4.
The opposed faces of the inner ends of the plug
55 sections III are provided with an annular groove
I5 for purposes presently to appear and said
plug sections III are maintained in assembled re
lation by the spring wire clips I6.
In lieu of the usual plug puller comprising the
ordinary coiled spring through which the con OI
ductor wires extend, there is provided a device
for relieving the strain on the conductor wires I 2
and I3 and said strain reliever includes a tubular
member II that is carried by a holder in the form
of a curved strap I8 that has its free ends directed 10
toward each other and reversely curved to provide I
a pair of ribs I9 that are seated in the annular
groove I5 in the plug sections II) to swivel there
in, the tubular member I‘! extending transversely
of the inner end of the contact plug. As shown 16
more clearly in Figures 1 and 3, the conductor
wire I2 extending from the contact plug is passed
in one direction as shown at 20 through the tubu
lar member I'I while the other contact wire I 3 ex
tending from the plug is passed in a reverse 20
direction as shown at 2I through the tubular
member I1 with the two portions 20 and 2I of the
conductor wires I2 and I3 frictionally con?ned
within the tubular member. The tubular member
I‘I extends transversely of the inner end of the 25
contact plug and if desired may be used as a
plug puller, but pulling strain on the inner ends
of the conductor wires I2 and I3 at their points
of connections I4 with the terminals II is re
lieved when the extended ends of the conductor 30
wires I2 and I3 are used as a pulling device in
View of the reverse passage of the conductor
wires through the tubular member I‘! with the
frictional engagement between the portions 20
and 2| of the conductor wires and frictional en
gagement between the conductor wires and tubu
lar member.
From the above detailed description of the in
vention, it is believed that the construction and
operation thereof will at once be apparent and
while there is herein shown and described the
preferred embodiment of the present invention, it
is nevertheless to be understood that minor
changes may be made therein without departing
from the spirit and scope of the invention as 45
claimed.
1. In an electric contact plug of the character
described, a plug body formed of mating sections,
each section having a semi-circular groove mat 50
ing with the groove of the other section to form
an annular groove when the sections are assem
bled, conductor wires extending from the plug
body, means for relieving pulling strains on the
conductor wires including a tubular member
2
2,137,162
extending transversely of the end of the plug body
bled, conductor wires extending from the plug
from which the conductor wires extend and ex
ternally thereof and a carrier for the tubular
body, means for relieving pulling strains on the
conductor wires including a tubular member ex
member including a strap surrounding the tubu
lar member and having its ends directed toward
each other and reversely curved to form ribs,
tending transversely of the end of the plug body
said ribs being located in the annular groove.
2. In an electric contact plug of the character
10 described, a plug body formed of mating sections,
each section having a semi-circular groove mat
ing with the groove of the other section to form
an annular groove when the sections are assem
from. which the conductor wires extend and ex 5
ternally thereof and a carrier for the tubular
member including a strap surrounding the tubu
lar member and having its ends directed toward
each other and said ends being located in the an
nular groove.
10
CHARLES L. HILE.
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