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Dec. 24, 1946.
.1. F. O’BRIEN
Filed Jan. 50, 1942
seph xF1730 Emen
~ (Mail-:1
fi’atented Dec. 194-6
isms STATES ear
Joseph F. O’Brien, Jersey City, N. .L, assigns:- to
John B. Pierce Foundation, New Yorir, N. Y", a
corporation of New florl:
- Application January 30,1942, Serial uaceaeoe
5 Claims.
(cl. 174-117)
This invention relates to electrical wiring sys
tems, and in particular to an improved electricity
conductor unit therefor.
_ by the means shown in Fig. 4.
Referring to the drawing, an improved wiring
system embodying the present invention includes
conductor units 56, id, of indeterminate length,
it is an object of the invention to provide an
electricity conductor unit of simple and inexpen
sive construction, having a hard, scuff-proof
mounted on
sluiace oi a wall it, and mutu
ally interconnect-es by means including the outlet _
outer sheath, and adapted for mounting on a wall
or other exposed location.
it is a further objectv of the invention to pro
vide an electricity conductor unit affording facili
of the electrieity conductor unit utter operation
Such electricity conductor units it? include
ties for the insertion of outlets in a wiring sys
tem at desired locations.
electricity cond rotors ill, M insulatedly mounted
within an outer
or sheathing 513, "which
is advantageously or‘ vulcanized ?ber or like in
according to a preferred form of the invention,
my improved electrical conductor unit embodies
saluting material or suitable surface hardness
' and rigidity.
material known in the trade '
electrical conductors insulatedly mounted in sub! 15 as “Vulcoi-il" has been found satisi’acmry for the
stantially uniform spaced relationship within an
outer sheathing id.
insulating casing formed from vulcanized ?ber
The electricity conductors it, it may be tubu
like hard material.
" lar, as shown in
2, or oi.’ otherv cross section
Said outer sheathing may be initially of oval , ‘providing proper conduction of electricity. T11
within which, at the respective lateral 20 buler conductors are advantageous tor the reason
margins therepf, are positioned electricity con
ductors. Following the insertion of the, conduc- >
tors as aforesaid, the assembly may be run be
tween suitable rolls or dies, having a width less
than the width between the conductors, to form
the wall of such outer housing about the con
ductors. The resulting conductor unit has a
its length and the tubular conductors are in
proper state for electrical connection with con
ductor units or‘outlet units without further op
between the conductors, maintaining the same
in proper spaced relationship.
Other features and advantages of the inven
in the drawing
Fig. 1 is a perspective view of a portion of an
electric wiring system employing my improved
electricity conductor, and illustrating the inter
connection of conductor units by means a?ord
lug outlet facilities;
Fig. 2 is an enlarged elevation, partly in sec
I tion, showing a form of interconnection between
‘the electricity conductors of the conductor unit
and the outlet-provided device of Fig. 1;
conductors, as indicated in Fig. 2; tubular con
ductors have a ifurther advantage in that when
a conductor unit it) is to be shortened, the unit
may be cut transversely at any location along
dumbbell con?guration in cross section, the cen
trel web portion serving as an insulating barrier
tion will hereinafter appear.
that electrically conductive pins 39 or the like
may be used for interconnecting adjacent tubular
As appears in Fig. 3, the conductors it may
be positioned within a generally ovate seamless
tube of “Vulccie” or like material, said material
being’, preferably, in a- relatively soft, or par
tially cured, state at this stage of msembly.
Following the insertion of conductors‘ M, the
sheath material may be operated upon by rela
tively narrow rollers it, I53, see Fig. 4, or drawn
between suitable dies, to displace inwardly the
portions between the conductors as, thereby
.40’ wall
forming web so
of insulation material between
the conductors M. Goncurrently with the op
eration of the rollers I 8 or equivalent, or sub
sequent thereto, the outer sheath material may
less form of, electricity conductor unit in av 45 be cured to final status, thereby giving to such
Fig. 3 is a transverse sectional view of a seam-,
outer sheath a permanent set and bond of the
. ,‘
sides of such sheath and adhesion between the
Fig. 4 is a. similar transverse sectional view
sheath and the conductors.
of the construction of Fig. 3, illustrating the op—
eration upon the assembly by rolls or like means 50 The units it may be provided with openings
2! at suitable intervals, through which screws
for displacing and compressing the central por
or nails may be passed to fasten the conductor
tion of the walls of the seamlesstube to form
unit to a wall surface.
the insulating web intermediate the electrical con
preliminary stage of manufacture;
ductors; and
Fig. 5 is an elevational view, partly in section,
Conductor units formed pursuant to this in
are characterized by toughness of outer
surface, and substantial structural strength, par- ‘
ticularly with respect to sagging or resistance
to bending in the plane of the web 2b. Screws
or the like‘ for securing the units it to a wall
may, therefore, be widely spaced; and when the
outlet units ii are relatively frequent, the com
ductor units it may be adequately secured by
the bodies of the outlet units, which, as shown
in Figs. 1 and 2, conform to the contour of the
onset and in fixed juxtaposition, with the opposite
wall portion to constitute a substantially closed,
rigid web for maintaining uniform spaced rela
tionship between the conductors.
2. A method of making an insulated electrical
conductor strip, comprising disposing bare con
ductors in spaced relation.- within a seamless
‘tubular casing of rigid insulation material, and
forcing a; portion of the casing wall between the
As appears in Figs. 1 and 2, adjacent sections 10 spaced conductors into ?xed juxtaposition with
its opposite wall portion whereby to' form a closed
of conductor units it may be interconnected
rigid .web for maintaining uniform transverse
through the agency of an outlet provided unit
spaced relationship between the conductors.
i2 having a body 22 of insulation material, and
‘3. A conductor strip comprising a seamless,
suitable conductors '23, 23 mounted therein for
tubular, elongated sheath of relatively
registry with the conductors it, iii of the con
rigid insulating material, at least one wall of
ductor units. When tubular conductors are em
ployed, the pins it may be frictionally inserted
into the adjacent conductors iii, 23, to complete
the electrical connection thereof.
Suitable contact devices as, as may be provided 201
which, intermediate its lateraI edges, is deformed
and de?ected into substantial contact with its 0D
posite wall to thereby provide a relatively rigid
web and two spaced-apart conduits at the lateral
edges thereof, and conductors disposed in said
on the conductors '23. . A screw ‘25 may pass
through the body of unit ii? for .securernent
‘l. A conductor strip comprising a seamless,
initially tubular, elongated sheath of relatively
The end walls of unit 52 desirablypverhang
the end portions of the units ill and conform 25 rigid insulating material, the wall portions in
termediate the lateral edges being deformed and
to the con?guration thereof, to secure the units
de?ected into substantial contact to thereby
and prevent exposure of the conductors at the
provide a relatively rigid web and two spaced
, point of interconnection.
apart conduits at the lateral edges thereof, and
Whereas I have described ‘my invention by
conductors disposed in said conduits.
reference to speci?c forms thereof,‘ it will be
5. A conductor strip comprising a seaesa
understood that vmany changes and modi?ca
tions may be .made without departing fromlthe
initially tubular, elongated sheath of vulcanized _
?ber insulating material, the wall portions inter
spirit of the invention.
mediate the lateral edges being deformed and
de?ected into substantial contact to thereby pro
1. An insulated electrical conductor strip, com 35 vide a relatively rigid web and two spaced-apart
_ prising a plurality of bare conductors ‘disposed
conduits at the lateral edges thereof, and con=
in spaced relation within a seamless casing of
ductors disposed in said conduits.
rigid insulation material of substantially uniform
wall thickness throughout, a portion or said cas
ing wall between the spaced conductors being ,40
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