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Патент USA US2409530

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Oct. l5, 1946.
H. L, BEEDE"
~2,409,529
BUOYANT ELECTRIC CABLE
Filed Feb. 6, 1943
RUBBE
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INVENTOR
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ATTORNEY.
Patented Oct. 15, 1946
,
2,409,529
UNITED STATES PATENT OFFICE
2,409,529
BUOYANT` ELECTRIC CABLE
Harry L. Bee‘dc, Fort Lee, N. J., assignor to The
Okonite-Callender Cable Company, Incorpo
rated, Paterson, N. JL, a. corporation of New
Jersey
Application February 6, 1943, Serial No. 474,932
9` Claims.
(Cl. 174-110)
2
1
This invention relates to an improvement in
When the inner sheath I4 above referred to is
employed it will be appreciated that there will
be a bondingI of the spacers and sheath during the
vulcanizing of theY outer and inner sheaths, so
that a dam against the> passage of water along
the interior of the cable is provided.
buoyant electric cables, namely, that type of elec
tric cable wherein the weight to volume ratio
is such as to enable the same to iioat in a medium
suchA as sea water.
One dimculty experienced with cables of this
type as heretofore constructed has been the tend
While the center or core cells have been
described as being internally reinforced, further
during cabling processing, and remaining that
resistance to crushing may be provided by main
Way, and one of the" objects of this invention is 10 taining the cells under internal pressure, say
ency of the center or core members to crush
75 or 100' pounds per square inch.
In the embodiment of the invention illustrated
to provide a construction embodying a new and
improved type of center or core member wherein
this diiilculty is overcome.
in Fig. 3, plastic cylinders 2, equipped With
hermetically sealed heads 4f and with reinforcing
In the accompanying drawings:
discs or braces 6 are provided, as in Fig. 1.
Fig. 1 is a fragmentary view of 'one embodiment
of the invention in sectional' elevation;
In
this embodiment of the invention, however, each
cell thus provided is cemented or otherwise held
Fig. 2 is a section on the line 2~-2` of Fig. l;
Within a tight fitting plywood cylinder I8. This
Fig. 3 shows another embodiment of'the‘ inven
provides a construction which is admirably suited
tion in sectional elevation;
Fig. 4 is a fragmentary sectional elevational 20 to buoyant cables, inasmuch as the plastic cells
may readily be hermetically sealed permanently
View of still another embodiment of my invention;
While by bracing these cells internally and en
Fig. 5 is a section on the line 545 ofFig. 4; and
closing them in the plywood cylinder I8, a con
Fig. 6 is a View similar to Fig. 4 of still another
struction is provided in which likelihood of crush
embodiment of the invention.
Referring to the drawings in detail and first of 25 ing, either in cabling or with the cable in service,
is reduced to the minimum. Spacers 8. are em
all to the embodiment of the invention illustrated
ployed between adjacent cells andthe cable con
in Figs». 1 and 2: 2 designates a plasticcylindrical
ductor I2 is stranded about this assembly direct,
member of cellulose nitrate, for example, hermet
or the assembly may Iirst be enclosed in sheath
ically sealed by plastic headsy Il. Sealing of the
heads in place may be accomplished by the use 30 I4. lß‘desi'gnates the outer non-metallic sheath
which immediately surrounds the cable conductor
of a cement or by using a solvent for thek material
as explained in connection with Fig. l.
of the cylinder and heads. The member 2` is
In the embodiment' of my invention illustrated
internally braced, by at least twodiscs 5, one at
in Figs. 4, 5, and 6. I have provided a construc
each end of the cylinder, to increase the resistance
tion in which I employ center cells or core mem
of' the cylinder to crushing from an externally
appliedA force, as, for instance, in cabling during
bers of' plywood which are coated or covered
theV processA of manufacture of the cable. The
and/or laminated with metal film orioil, metal
lized paper, Bakelite paper or Bakelite film, etc.
discs 6 may be of wood, of plywood, or other suit
Such a celll or core member will not corrode
able material.
The cells thusv provided are disposed* end to end 40 readily, Ais highly resistant to Water and moisture
and has> high crushing resistance. In this latter
along the cable center, adjacent cells being spaced
connection the cells or core- members may be
by spacers 8. These spacers may be inflated
braced' internally, if desired, and may be kept
rubber cylinders or other construction but have
under fairly high internal pressure, say '75 to 100
been shown as composed of' cellular rubber, in
which event each spacer is preferablyk provided 45 pounds' per’ square inch gauge.
In order that the iiexibility of the cable be
with a gas-¿impervious skin I0. The Wires com
posing the cable conductor I2 may be stranded
directly about the assembly of' alternate»v cells
main-tained, these center or' core members are
and spacersïor a ñexible sheath la of' rubber' or
separators.
separated from each other by resi-lient“ spacers or
'
rubberèlike-“material may first bey applied about 50
The conductor of the- cable- is stranded about
the> assembly of core cellsî and spacers andA a
the assembly, as'shown in the drawings, and the
non-metallic. sheath surrounds the conductor.
conductor I2 applied about this sheath.
As will be understood, the weight ¿to volume
About theQconductcrl I2 a nonàmetallic, flexible,
ratio of. thecable is: such as; tov enable’. ther same
Waterproof-¿sheath |6,such as a sheath of~- rubber.;
isiappliedeandsvnlc’an,iZîf?d;íllJIlBlíel~
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55
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2,409,529
3
4
Referring to the embodiment of my invention
illustrated in Figs. 4 and 5: 20 designates a ply
wood cylinder provided with plywood heads 22
hermetically sealed in place. The cell thus pro
plication of the conductor or with the cable in
use.
It is to be understood that changes may be
made in the details of construction and arrange
ment of parts herein shown and described with
in the purview of this invention.
What I claim is:
1. In a buoyant electric cable, the combination
of a plurality of hermetically sealed, plastic cen-~
vided is completely enclosed in a metal ñlm or foil
. 24 or this ñlm may be metallized paper, Bakelite
paper or Bakelite nlm. The primary function of
this film is to render the cell water and moisture
proof. If desired, the cell may be internally
reinforced although without such bracing a ply
ter members or cells, braced internally, with
transversely extending wooden discs, spacers be
tween adjacent cylinders, a conductor stranded
wood cell such as described is extremely highly y
resistant to crushing forces.
These cells are
distributed along the center of the cable, adjacent
cells being spaced or separated by spacers or sepa
rators 8.
about said cells and spacers, and an enclosing,
non-metallic, water-impervious, flexible sheath,
These spacers are resilient and may be
the weight to volume ratio of the cable being such
composed of cellular rubber, for example, as illus
trated, or they may be in the form of inflated rub
ber cylinders, or they may be made up of other
materials.
When cellular rubber is employed it is
preferable to enclose each spacer in a gas imper
vious rubber skin I0.
as to enable the same to ñoat in a medium such
as sea water.
2. In a buoyant electric cable, the combination
of a plurality of hermetically sealed, plastic cen
20 ter members or cells, braced internally, with
transversely extending plywood discs, resilient
The wires constituting the cable conductor I2
may be stranded immediately about the assembly
of cells and spacers, or, as illustrated, the cells
spacers intermediate adjacent cells, a rubber
sheath enclosing said cells and spacers, a cable
conductor stranded about said sheath, and an
and spacers may be enclosed in a rubber sheath 25
outer non-metallic, water-impervious, flexible,
I4 and the conductor stranded about this sheath.
About the conductor I2 is a non-metallic, Ilex
ible, waterproof sheath I6 of rubber or rubber
like material.
The cable after assembly is subjected to vul
canization and when employing the rubber
spacers and the rubber sheath I4, above referred
to, these two elements bond to each other in this
operation so that a seal is provided at the pe
riphery of each spacer against the passage of
water along the interior of the cable.
The construction above described is ideal for
rubber-like sheath, the weight to volume ratio
of the cable being such as to enable the same to
float in a medium such as sea Water.
3. In a buoyant electric cable, the combination
of a plurality of center members or cells each
comprising a sealed plastic cylinder, braced in
ternally, with transversely extending plywood
discs, cellular rubber spacers intermediate adja
cent cells, a rubber sheath enclosing said cells
and spacers, a cable conductor stranded about
said sheath, and an outer non-metallic, water-im
pervious, flexible, rubber-like sheath, the weight
buoyant cables. The plywood cells employed for
to volume ratio of the cable being such as to en
the center or core members are highly resistant
able the same to ñoat in a medium such as sea
to crushing so that they are not deformed in the 40 water,
manufacture of the cable and not easily crushed
4. In a buoyant electric cable in which the
when the cable is in operation.
weight to volume ratio of the cable is such as to
It will be appreciated also that by enclosing
enable the cable to float in a medium such as sea
each cell in a metal film, such as metal foil or
metallized paper, or in a film of a phenolic
condensation product, such as Bakelite, or a
Water, the combination of a center comprising a
- plurality of hermetically sealed plastic cells, each
Bakelite paper, entry of Water or moisture to the
cell is precluded and corrosion eliminated.
The embodiment of my invention illustrated in
Fig. 6 comprises a plywood cylinder 26 equipped
with heads 28 hermetically sealed in place. In
termedlate at least one pair of adjacent plies of
the wood constituting the cylinder and heads are
films or layers 30 of metal foil, metallized paper,
cylinder about the exterior of each cell, spacers
of cellular rubber intermediate adjacent cells, a
stranded conductor about the assembly of cells
and spacers, and an outer vulcanized rubber
sheath.
5. In an electric cable wherein the weight to
braced internally with wooden discs extending
transversely of the cell, a tight fitting plywood
volume ratio cf the cable is such as to enable the
a Bakelite film or a Bakelite paper. If desired, in 65 same to float in a medium such as sea water, the
addition the cell may be enclosed in a film of any
combination oi a center for the cable comprising
of the materials just mentioned as explained in
connection with Fig. 1.
a plurality of hermetically sealed cells separated
from each other by rubber-like spacers, each cell
The core cells are separated from each other
comprising a cylindrical member of plastic ma
by spacers 8 which may be cellular rubber, in 60 terial braced internally with wooden discs, said
flated rubber cylinders, etc., as mentioned in con
cells extending lengthwise of the cable and said
nection with Fig. 1.
discs transversely of the cable, a cable conductor
The conductor I2 which is surrounded by water
stranded about the cells and spacers, and a vul
impervious sheath I6 may be stranded immedi
canizcd rubber sheath about the conductor.
ately about .the assembly of core cells and spacers, 65
6. In an electric cable wherein the weight-to
or these elements may ñrst be enclosed in rubber
volume ratio of the cable is such as to enable the
like sheath I4 and the conductor stranded about
to float in a medium such as sea '-yatei‘, the
this sheath.
,
combination of a center for the cable comprising
It will be appreciated that in al1 embodiments
a plurality oi hermeticallyssealed cellsscparated
of-my invention herein illustrated anddescribed 70 from each other by rubber-likespacersieach; Cell
I have provided a construction wherein the cen
comprising a cylindrical member of plastic mate
ter> or core cells are not only highly resistant to
rial braced internally with wooden discs, a tightl
moisture, but highly resistant to crushing forces
so...t.hat. no difficulty will be experienced with
smashing of the. cellsout ni’. shane
fitting plywood cylinder about eachY Cell, said cells
„extendinglengthWise of the cable and said _discs
theep» 75 _transversely ci the .,6able4a1~cable.. eenduidig
2,409,529
6
stranded about the cells and spacers, and a vul
canized rubber sheath about the conductor.
7. In a buoyant electric cable, the combination
ble sheath, the Weight to volume ratio of the cable
said cells and spacers, and an enclosing non-me
being such as to enable the same to float in sea
water.
9. In a buoyant electric cable in which the
Weight to volume ratio of the cable is such as to
enable the cable to ñoat in a medium such as sea
water, the combination of a center comprising a
tallic, water-impervious, flexible sheath, the
plurality of hermetically sealed plastic cells, a ply
weight to volume ratio of the cable being such
wood cylinder fitting over each cell, spacers be
as to enable the same to float in sea water.
tween adjacent cells, a sheath of rubber-like ma
terial about said assembly of cells and spacers,
a conductor stranded about said sheath, and an
of hermetically sealed plastic cells, a plywood cyl
inder ñtting over each cell, resilient spacers be
tween adjacent cells, a conductor stranded about
8. In a buoyant electric cable the combination
of hermetically sealed, internally braced, plastic
cells, a plywood cylinder ñtting over each cell, re
outer enclosing non-metallic water-impervious,
silient spacers between adjacent cells, a conduc
ñexible sheath.
tor stranded about said cells and spacers, and an 15
HARRY L. BEEDE.
enclosing non-metallic, water-impervious, flexi
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