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Патент USA US2135320

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Nov. l, 1938.
F. G. BovARD
Filed Nov. 1l, 1936
20 i
/F/m/aj G ÖoVaf-d
Patented Nov. 1, 1938
Floyd G. vBavard, Akron, Ohio, assignor `to The v
Ohio Brass Company, Mansfield, Ohio, a cor
poration oi.' New Jersey
Application November 11, 1936, Serial No. 110,308
s claims. (Cl. 173-303)
This invention relates to devices for holding
the ends of hollow conductors such as are used
for high potential electrical transmission lines.
and has for one of its objects the provision of
5 simple and eii'ìcient gripping mechanism for
holding the end of a conductor without injury
and without danger of the conductor slipping or
becoming released.
A further object of the invention is to pro’
10 vide a device of the class named which shall
be simple in its construction, economical to man
ufacture, easy to install, and which shall be of
improved construction and operation.
Other objects and advantages will appear from
>the following description.
The invention is, exemplified by the combina
tion and arrangement of parts shown in the ac
companying drawing and described in the fol
lowing speciiication, and it is more particularly
pointed out in the appended claims.
In the drawing: I
Fig. 1 is a longitudinal section of a conductor
joint showing one embodiment of the present
Fig. 2 is a section on line 2-2 of Fig. 1.
Fig. 3 is a section on line 3-3 of Fig. 1.
Fig. 4 is an elevation, partly in section, show
ing the application of the invention to a dead
end clamp.
Fig. 5 is an elevation looking
in Fig. 4.
from the right
somewhat modiñed form of the invention.
Fig. 7 is an elevation looking from the right
in Fig. 6.
of the conductor i0. The plugs IS -are provided 10 ». '
at their inner` ends with heads il' which are
arranged to slide within the opening in the body
member I2. The plugs IS are also provided with
keys i8 which extend into the slots in the wedg
ing members I5 and whichl also project into lon- ß
gitudinal slots I9 in the body member I2. Pack
ing cups 20 are disposed at the inner` sides of
each of the heads i'l to prevent the escape of
a pressure medium within the body member i2.
These packing cups may be made of leather, 20
rubber or other suitable packing material. The
body member I2 is perforated, as shown at 2|,
and is provided with a valve 22 through which
a pressure medium, such as grease. oil or other
fluid'or semi-fluid material, may be forced into g5
the opening in the body member to move the
packing members 20 and the heads I1 outwardly
and’to hold them in their outer positions. Inthe appended claims the term “hydraulic” will
be used to include any suitable liquid or par- 30
tially liquid pressure medium.
Fig. 6 is a view similar to Fig. 4 showing a
dove-tailed together and each having a'longi
tudinally extending groove on its inner surface.
These grooves iorrn helical threads within the
conductor. In order to prevent the conductor
from being crushed by the wedging action of the 5
member I5, a central plug I6 is varranged to till
the end portion of the conductor and'has its
outer surface formed with helical projections
thereon shaped to fit the grooves‘on the inside
Fig. 8 is a section on line 8-8 of Fig. 6.
In Fig. 1 of the drawing, the numerals Ill
and II represent the adjacent ends of a Vcon
ductor to be joined together. 'I'he joint for con
40 necting the two ends comprises a hollow body
member I2 having end sections I3 and I4 thread#
ed~onto the opposite ends thereof, each end sec
In assembling the device tok secure the con
ductor ends i0 and II together, the end members
i3 and i4 are slipped over the cable ends I_0
and il respectively and the conical wedges are 35
slipped into the openings in the end members
surrounding the conductors. The plugs I6 are
threaded into the ends of the conductors and
the parts thus assembled on the‘conductor ends
are then brought into engagement with the re
spective ends of the body member I2, the pack
ing cups 20 being first moved inwardly to their
tion having a tapered opening therein. Disposed innermost positions. This will permit the con
within each end section is a wedge member i5 ductor ends and the wedging members I5 to be
45 having its outer surface tapered to ñt the inner .
moved inwardly a suiiicient distance to clear the 45`
surface of the end member and each wedge end members I3 and i4 so that they may be
member having a cylindrical opening for rea screwed home on the body member` I2. The keys
ceiving the respective conductor ends iii and Il. i8 will now be in engagement with the slots in
The wedge members have slots extending inward
the Wedges I5 and .with the grooves IS inthe
50 1y from opposite ends, the slots from the oppo - body member. A suitable pressure gun is now 50
site ends being arranged in staggered relation
connected with the valve 22 and a pressure me-
so that the entire member may be compressed
when wedged into the conical end member.
The conductor I0, as shown in Fig. 2, is formed
dium injected into the opening in the body mem
ber. This Will force the packing cups 20 and
theheads il outwardly, the heads I'I engaging
the inner ends of the wedge members I 5 and 55
v55 of helical sections or strips, the strips being
8, 185,890 _
cable, the contour of the individual strands form
in the end members I3 and il. This will com
ing threads on the inner surface of saidy cable,
said gripping means comprising a core member
press the wedge members i5 against the walls of
the conductor ends I0 and Hand firmly grip
threaded to fit the threads in said cable,> a wedge \
member engaging the outer surface of said cable
the walls of the conductor between the wedge
forcing them tightly into the tapered openings
members Ilv and the pins it.
about said core member,jand a tapered socket
Any desired pres
-sure for gripping the .conductor ends may be
- y member engaging said wedge member.
dium within the body member i2. ’I‘he inter
litting helical formation on the surfaces of the
pins I6 and the innerwalls of the conductors
will assist in holding the conductors in place
since the pins are held from rotation and the.
conductors would consequently -have _to be ro
tated to be withdrawn from the clamp.
In the form of the invention shown in Figs.
'4 and 5, the _gripping mechanism furthe con
ductor end_is similar to that described in con
nection with Fig. l but in this ?gure, a single
zoy end construction is shown instead of a double
connecter, as in Fig. l'. In Fig. 4 the body mem
' ber :s is provided et one end with an attien
ment eye 2l for ‘connecting to a suitable end
support. A clip 2l is provided for connection
3. A cable holder comprising an electrical con
secured by regulating-the pressure of the me-
` nector having a hollow-body with a tapered socket
at one end thereof for receiving said cable, a com-_
said socket, a core member disposed within said
cable, and hydraulic pressure means for press- ’ l`
ing said core member,~ cable -and. wedge into said
tapered socket toV compress said -wedge on said 16
cable and grip the -wall of said> cable between said
wedge and said core member.. _
4. A cable holder comprising an electrical con-`
nector having a hollow body with a tapered socket
at lone end thereof for receiving a hollow cable.
a wedge member disposed in said socket v_about
said cable, a core> member' disposed in said cable
within seid wedge member, e piston in endlbedy _ _
member having bearing connection y with vsaid
In the form of the invention shown in Figs. 6
and 7, the innerendof the wedging cone 2i bears
wedge- member, and meansforg introducing a
hydraulic pressure- transmission medium under
pressure into 'said body member to- movesaid `pis-'
ton andV force said _wedge member into said
against a disc 21 which engages the packing cup
with a .iumperto continue the circuit of the
conductor Il.
pressible conical wedge suñ'ounding said cable in`\
5. A cable holder comprising a body member
2l, and the inner pin Il is made separate from
thedisc 21 and Abears against the center of the _having a tapered socket for receiving a- hollow
disc..Th_eouter end of the pin 28 isbored to ‘cable having helical grooves in the inner surface/1
receive the end of a bundle of bars or rods It
which are twisted together and secured, _as shown
35 -~in broken lines at Il, within the opening in _the
thereof, a core member disposed in -said ca_ble `
and having its louter surface shaped to 'conform
to the .inner'surface of said cable, a >wedge mem;
ber disposed in said socket forvengaging the outer
surface of said cable, meansV for forcing said
end of the pin 2l. The rods 2_0 are somewhat
resilient and spring outwardly so as to engage
the inner surface of the. conductor Il. These ' wedge _member intosaid socket, and means for
rods extend within the conductor some distance preventing rotation of said core member relative
40 'away from'the clamp and Aserve to reinforce the
to said body member.
conductor adjacent the end of the clamp and pref. » _; 6. Acable holder comprising a hollow body`
vent fatigue due to vibration. A short lengthi‘if'l member having a- tapered socket at one end
thereof for receiving a hollow cable formed with
‘ stranded cable may be used for this purpose'
In the form shown in Fig. 6, the tapered-and
is cylindrical portions of the body memberarefmade
in one piece andaremovable 'plug 3i _ls‘threaded
into the rear end ofthe body membertopermit the
~ wedging
_be assembled. When the
parts are in place,
_8i may belscr‘ewed
into the threaded opening inthe rearend of the
body- member'and locked in placeby a locking
member disposed in's'aid socket about said cable,
a core member` disposedin said'cable and shaped
to nt the helical grooves in said cable, a piston
having bearing’ connection with said core ’mem
berl and said wedge member, means for applying
hydraulic pressure/to said piston to force _said
cable, core member and wedge `member into said.
screw I2. ’ Agexible Jumper Itis clamped to the
tapered socket, and means for preventing rota
body memberliby al _U-bolt' “___a?d a keeper piece
tion >ofv said core member and~wedge member `
1. Means foi-„gripping a hollow cable composed
of a multiplicity' of' »helically wound strands dis
posedV side by side and constituting .the wall of a
hollow cylinder, said strands forming helical
60 threads on the inner surface of said cable and
being disposed at a lsufliciently steep pitch that
the dominant portion of the longitudinal stress
of said cable is exerted longitudinally of said
strands, said gripping means comprising a-core
65 member in immediate contact with said strands
and having its' outer surface threaded to fit the
threads on the inner surfaceof _said cable and
helicalV griñves on its inner surface, a wedge
_relative to said body member.
,_ 7. 'I'he combination with a -hollow conductor, 65
of a support therefor, and a resilient insert ar
ranged in said conductor adjacent-said support
for counteracting theeñects of vibration on said
conductor said insert \comprising a multiplicity
of elongated members -secured at one end t'o said _
support, and resiliently spread outwardly agains
the inner surface 'of said conductor.
8. The combination with a hollow conductor, . .
of a support for said conductor comprising a> '
core 'disposed within said conductor, and means
for gripping the wall _of said conductor againstl
said. core, and a resilient reinforcement
means for clamping said cable on said core mem*
within said conductor and connected'@
forv offsetting the effects of vibration -orti
2. Means for gripping ,a hollow cable composed'
of a multiplicity of helically wound strands dis
posed side by side to form the walls of a hollow
cylinder, the strands having a sufiicien'tly steep
pitch to receive longitudinally thereof the dom
76 inant portion of the longitudinal stress on said
_ '
conductor at its point of support said reinfßrœ_rw l u
ment comprising a short length of stranded cable-.'-A
cable at
one end
to said spread
core, the
`^ ’
with the interior of said conductor.
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