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Патент USA US2119394

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- May 31, 1938.
’ E. H. LEWIS Er AL
2,119,394
ELECTRIC 0mm:
-' Filed Dec. 18," 1934
BRA|D/-7
RUBBER
COTTON
CONDUCTOR
Inventors: .
' Edward H.Lewis.
Cliff‘ovgl O. Hull,
)0 .
?g/wf
‘
PH Their‘ Attornepy.
Patented May 31, 1938
2,119,394
UNITED STATES PATENT OFFICE
2,119,394
ELECTRIC CABLE
Edward H. Lewis, Union, N. .L, and cumin 0.
Hull, Stratford, (lonnqiassignors to General
Electric Company, a corporation of New York
Application December 18, 1934. Serial N .,758,012
2 Claims. (Cl. 173-2643
Our invention relates to an electric cable and rubber Jacket IS a ?brous braid I1 is formed.
more particularly to a cable with an overall
Due to the ribbed surface on the jacket Hi the
?brous braid which will not fray back from the braid‘il tightly engages the jacket I6 and does
end of the cable.
An object ofour invention is to provide an
improved electric cable in which the outer cover
ing of braid will not become loose and fray back
from the end while the cable is in use. ‘
What we consider to be novel and our inven
10 tion will be better understood by reference to
the following speci?cation and appended claims
when considered in connection with the accom
panying drawing in which the single figure is a
side elevation of our improved cable showing the
15 layers of insulation. In cable provided with an
overall rubber jacket covered with a ?brous braid
di?iculty has been experienced due to the fact
that the rubber jacket has a smooth exterior
surface over which the braided covering is
formed. The braided covering at its free end
moves freely over the surface of the rubber and
is loosened in use and in the course of time the
braided covering begins to fray back from the
end. To prevent the loosening of thebraided
covering when it is applied'over a rubber jacket,
not become loosened with use and so will not
fray back from its free end. .It may also be 5
found desirable where a single conductor with a
rubber jacket is covered with a braid to form
the surface of the Jacket with ribs to prevent
loosening of the braid from the single conductor
and its insulation. It is believed that longitudi- 10
nal ribs will more efliciently prevent the loosen
ing of the braid but it may be found satisfactory
in some cases to use ribbed surfaces which ex
tend spirally over the jacket or in any other ir
regular form.
15
From the foregoing it may be seen that an
improved cable is provided with a rubber jacket
covered by a braid which will not become loosened
with the use‘of the cable.
.
What we claim as new and desire to secure by 20
Letters Patent of the United States is:
1. An electric cable comprising a conductor,
a rubber covering over the conductor having a
plurality of small continuous ribs extending
throughout its length and which are closely ar- 25
we have provided a plurality of closely arranged ranged, and a ?brous covering braided tightly
ribs on the surface on the rubber jacket which over the rubber covering whereby the ribs pre
presents 'a'high friction surface to the braid and , vent the ready loosening and fraying back of
thus prevents the loosening and fraying back of
the
braid.
_
_
'
,
In the drawing, ‘l0 and I I indicate two strand
ed conductors. Over the conductors Wand ll
_ cotton coverings I 2 and [3 are provided which
the braid.
.
.
v
2. An electric cable comprising a plurality of 30
conductors, an, insulating covering over each con-
‘
ductor, a' rubber jacket over the combined con
ductors having a plurality of small continuous
are formedby cotton/strands laid longitudinally
It may belfound desir
and which are closely arranged, and a fibrous 35
able to form the cotton coverings I2 and i3 by a
braid or winding. Over the cotton coverings
l2‘ and I3 layers of rubber insulation l4 and I5
covering braided tightly over. the rubber jacket
whereby the ribs prevent the ready loosening
and fraying back of the braid.
35 around the conductors.
- are provided. Over'the combined conductors and
40 insulation on overall rubber jacket I6 is provided
with a longitudinal ribbed surface. _ Over the
longitudinal ribs extending throughout its length
EDWARD H. LEWIS.
CUFFORD o. HULL.
40
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