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NOV. 12, 1946.
'_D, J_ NEALE
2,410,836
CLAMP FOR PLATFORM PULLEY BLOCKS
Eiled Oct. 7,1944
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Patented Nov. 12, 1946
234109836
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UNITED STATES PATENT 4
OFFICE i f
2,410,836
CLAMP FOR PLATFORM‘ PULLEY BLOCKS
Dory J. Neale, Topeka, Kans.
Application October 7, 1944, Serial No. 557,659
6 Claims.
(01. 304-15)
1
This invention relates to clamps for attachment
of supports and tools necessary in the splicing
and repairing of overhead telephone cables and
the like.
It is the present practice to attach overhead
telephone cables to the supporting messenger
with a wire spiraled about the cable and mes
phone cable which includes an outer lead sheath
7 containing a plurality of insulated wires indi
cated at 8. The cable 5 is attached to the mes
senger 3 by a wire 9 that is wound spirally about
the cable and messenger to bind the cable in rela
The
tively close contact with the messenger.
structure thus fardescribed is the present ac
senger whereby the cable is relatively closely
cepted manner of’ attaching .overheadtelephone
bound thereto. With this method of supporting
and similar cables and speci?cally forms no part
overhead cables, it is dif?cult'to suspend the plat 10 of the present invention, but is illustrated to give
form and various tools required in preparing and
a better understanding of the purpose and use of
splicing overhead cables without causing injury
to the cable sheath and the wires contained
therein,
'
-
It is, therefore, a principal purpose of the
present invention to provide messenger-engaging
clamps which are adapted for safe and secure
anchorage on the messenger without exerting
pressure on the cable and contents thereof.
Other objects of the invention are‘ to provide
clamps that are readily attached and removed
from a messenger; to provide the clamps with
hinged jaws for gripping the cable and having
arms extending outwardly and downwardly from
the messenger so that they are .out of any sub
stantial contact with the cable; and to provide
the jaws with positive retention means and there
by prevent displacement thereof from the mes
senger gripped thereby.
.
my invention as now to be described. ' H
;
In repairing and splicing such cables, it is nec
cessary to provide for suspension of a Workmanfs
platform i?, a hoisting cable H, and the anchor
age of a, ladder IE to the messenger 5, andJI have
provided clamps arranged to grip the messenger
without exerting injurious .pressurevon the cable.
The clamps are basically of the same construc
tionbut vary in'the number and shape .of the
arms used ‘in suspending the various accessories
necessary tothe ‘use and ‘convenience of the cable
repairman. Each clamp includes a pairvof jaws
l3 and 1410f block-like formation and having
substantially flat mating faces l5 and liilwhich
are retained in juxtaposed position by a hinge
connection IT. The hinge connection preferably
includes one or more ears 18 on the .upperpor
tion of one of the jaws interengaged with comple
In accomplishing these and other objects of 30 mentary ears l9 and 2-0 on the other jaw, the
the invention hereinafter pointed out, I have pro
jaws being suitably‘ recessed as at 2| to accom
vided improved structure, the preferred forms of
modate the ears of the other jaw whereb-ythe
which are illustrated in the accompanying draw
pivotal axis of the hinged connection extends
ing wherein:
.
transversely of a plane intermediate the .facing
Fig. 1 is a perspective view of a portion of 35 sides of the jaws. The ears of the hinged connec
an overhead cable attached to its messenger by
tion are provided onthe hinged axis with regis
a Wire spiraled thereabout and illustrating at
tering openings 22 and 23 to accommodate a
tachment of my improved clamps used in sup
hinge pin 24 that is suitably anchored therein
porting the workman’s platform, ‘supports, and
to connect the jaws whereby the faces l5 and it
hoisting cable.
40 are adapted to‘ open andclQserelativeto-a mes
Fig. 2 is a side elevational View partly. in cross
senger 3 and which is adapted to be receiviedin
section of my improved clamp and shOWlng at
transverse grooves Hand, 26 formed inthe lower
tachment thereof to the messenger-without ex
marginal edges of the respectiyeifaces as clearly
erting injurious pressure to the cable supported
shown in Fig. 3. ‘Thegrooves 25 and Ziiare. closely
thereby.
1
4 locked adjacent the .underfaces 'Eland 23 of the
Fig. 3 is a perspective view of the jaws of the
jaws so that the lips 29 and 1-39 provided between
clamp shown in disassembled spacedrelation.
the grooves and the faces 27 and:2_8 are'of a size '
Fig. 4 is a section through a clamp constructed
to enter the space between'the messenger and
in accordance with the present invention and
cable supported thereby without, exerting pressure
equipped with arms. for supporting a cable splicer’s 50 on the cable. 'I'hegrooves'25 and 26 areprefer
platform.
>
'
~_
..
Referring more in detail to the drawing: '
i and 2 designatea series of poles‘carrying
a messenger wire 3 that is supportedtherefrom
by theusual clamps ll and-5. .6 designates, a tele
ably shaped to conform to. the ‘cross-sectional
contour of the cable s0 as to avoid deformation of
the messenger- The endsei and vouter faces of
the jaws‘ may be suitably shaped'for theparticu
55 laruse ofthe clamp-but the upper edges arepref- .
2,410,836
3
erably inclined as at 32 relative to the axis of
the hinge connection and form stops 33 to limit
opening movement of the jaws.
In order to retain the jaws in engagement with
a messenger, each clamp is provided with a look
ing screw 35 having a shank 36 extending
through an opening 31 in one of the jaws and
having a threaded terminal 38 engaged in a
threaded socket 39 of the other jaw as shown
4
is applied in the same manner and the jaws tight
ened on the messenger so that the ring 44 de
pends directly thereunder and the pulling forces
act directly thereon independently of the cable.
From the foregoing it is obvious that I have
provided clamps for attachment of a platform
and tools and the like necessary in splicing and
repairing cables whereby weight is carried di
rectly on the messenger without applying pres
sure to the cables carried thereby.
10
The screw also includes a head 40
in Fig. 2.
forming a shoulder 4| with the shank 36 for
stop engagement with the outer face of the jaw
M, the head being provided with suitable arms
42 by which the screw- may be readily rotated to
bring the jaws into engagement with the mes
senger as later described.
The clamp illustrated in Fig. 2 is for attach
ing the hoisting cable II and, therefore, the jaw
14 which carries the screw is provided with a
yoke-shaped arm 43 that projects transversely with respect to the grooves 25 and 26 and termi
nates on the side of the grooves substantially op
posed to the hinge pin 24 in a ring-shaped termi
nal 44, which in the present instance, is located
directly below and in plane with the face [3 of the jaw to attach a tackle or pass .the hoisting
cable ll therethrough as shown in Fig. l and
whereby the pulling forces exerted in actuation
of the cable are imparted directly to the mes
senger without causing pressure on the cable.
The jaws of the clamp shown in Fig. 4 are
substantially the same as employed and illus
trated in Fig. 2 with the exception that the look
ing screw is threaded within an internally thread
ed opening 36’ of the jaw l4 correponding with
the jaw previously described whereby the termi
It is also obvious that I have provided clamps
which are readily applied and afford safety to
the workmen.
What I claim and desire to secure by Letters
Patent is:
1. A clamp for attachment to a cable-carrying
messenger wire including a body member having
a pair of jaws one of which has a transverse
groove to receive the messenger wire therein,
means connecting the jaws for movement of
the jaws apart when placing the clamp on the
messenger, a lip on said body member adapted to
engage between the messenger and the cable car
ried thereby, means locking the jaws together
when the jaws are engaged with the messenger.
and means projecting from one of the jaws to
suspend an object from said messenger.
2. An apparatus of the character described in
cluding a pair of clamps, each including a sub
stantiallyrectangular-shaped body member, a
pair of jaws having transverse grooves in facing
sides thereof for receiving a messenger, means
including mating ears carried by the upper por
tion of the respective jaws hinging the jaws to
' gether, a locking screw carried by one of the
jaws and adapted to engage in a socket of the
other jaw of the pair of jaws to prevent hinging
nal end 38' is adapted to engage in a socket 39'
movement of the jaws when a messenger is re
in one of the ears of the other jaw to prevent
ceived in Said grooves, arms projecting from the
opening of the jaws when the jaws are closed
jaws, a platform, and means on the arms for sus
~10
upon the messenger as shown in Fig. 4. In this
form of clamp, each of the jaws is provided with
a downwardly and outwardly extending arm 46
and 41 terminating in ring-like terminals 48 and
pending the platform from said messenger.
3. A clamp for a cable-carrying messenger in
cluding a body member having a pair of jaws
having
tranverse grooves in facing sides thereof
49 to attach ropes 50 or the like suspending the
platform It! at a desired proper position below ~ near the lower portion of said body member for
receiving a messenger, means near the top of said
the cable 6. The platform [0 may also be sta
body member hinging the jaws together, a lock
bilized by a rope or the like 5| lashed to the
ing screw carried by one of the jaws and adapted
adjacent pole in any suitable manner.
to engage in a socket of the other jaw to prevent
The clamps illustrated in Fig. 4 are used in
pairs to support the respective sides of the plat- ' hinging movement of the jaws when a. messenger
is received in said grooves, arms projecting from
form and one of the clamps may be provided
opposite sides of the jaws, and ring-shaped ter
with an eye 52 for attaching a rope 53 adapted
minals on the arms for connecting an object to
to engage one of the legs of the ladder to prevent
be suspended vfrom said messenger.
sliding of the ladder on the messenger.
In using the platform-supporting clamps con
structed as described, the screws 35 are backed
4. A clamp for a messenger having a cable con
nected therewith by a wire wound spirally about
the cable and messenger including a pair of jaws
out of the sockets 39’ to permit spreading of the
having facing sides and provided with transverse
jaws to receive the messenger in the grooves 25
grooves to receive the messenger, lips on the jaws
and 26 thereof and one of the clamps is attached
for engagement between the messenger and the
to the messenger adjacent one side of the pole l
cable, means adapted to lock the jaws together
and the other clamp is attached to the messenger
when the jaws are engaged with the messenger,
.at the opposite side of the pole and in spaced
and means projecting from one of the jaws adapt
relation therewith to suspendingly accommodate
ed to be connected with an object to be suspended
the platform l0 therebetween as shown in Fig. 1,
from the messenger.
the platform being supported by the ropes or the
5. A clamp for a cable-carrying messenger in
like 50 from the ring-like terminals 48 and 49 of
cluding a substantially rectangular-shaped body
the arms so that the platform is in level position
member adapted to ride on top of the messenger
after which the platform may be stabilized by
having a pair of jaws having transverse grooves
the rope 5|. If the ladder I2 is used, it may be
anchored to the eye 52 of the adjacent clamp by 70 in facing sides thereof for receiving the mes
senger therein when the jaws are brought to
the rope 53 so that it cannot be blown over by the
gether, means near the top of said body con
wind or slide along the messenger.
necting the jaws for moving the jaws apart when
Other clamps may be attached to the messenger
placing the clamp on the messenger, a locking
in convenient position; for example, the clamp
screw carried by one of the jaws and adapted to
75
used in supporting the hoist cable I I. This clamp
2,410,836
5
engage the other jaw for securing'the jaws on
the messenger, and an arm projecting from one
of the jaws and having a ring-like terminal po
sitioned below the messenger when the jaws are
secured on the messenger.
6. A clamp for attachment to a cable-carrying
messenger wire including a pair of jaws having
transverse grooves for receiving the messenger
wire therein, means connecting the jaws for
6
movement relative to each other when placing
the clamp on the messenger, means for rocking
the jaws on the messenger, and means project
ing’r‘from one of the jaws transversely with re
spect to said grooves and terminating on the side
of the grooves substantially opposed .to said con
necting means for supporting an object to be sus
pended vfrom the messenger.
DORY J. NEALE.
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