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Jan. '7, 1947.
- 2,413,909
Filed Aug. '7, '1944 '
4 Sheets-Sheet 1'
‘Filed Aug. 7, 1944
4 Sheds-Sheet?
HQ. 2.
Jan. 7, 1947.
Q H,.<;L_5MENT ‘ET AL _
Filed Aug. 7, ‘1944 -
4 Shéets-Sheet z' '
' FIG. ' 3
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Jan. 7, 1947.‘
' Filed Aug. 7,- '1944
4 Sheets-Sheet 4
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Patented Jan. v7, ‘1947
2,413,909 ‘
'wrna-s'rnmomo- MACHINE
Clyde H. Clement andFRobert H. Armstrong,
Phoenix, Ariz.
ApplicationAugust 7, 1944,’Ser'ial No. 548,482
1 Claim. (Cl. 175-376)
This invention relates to wire stringers of the '
type adapted to place and string power line wires
on overhead poles for transmission of electricity.
Heretofore, line wires have been placed and
strung by ?rst unreeling the wire on the ground
parallel with the‘ line of poles; then elevating
the wire to the cross arms; then stretching and
tightening the wire, one-half mile or so at a
time,‘ while climbers goup each pole included in
the stretch and fasten the wire to the insulators
on the cross-arms. This operation requires a
Figure 2, a plan view of the bed and mecha
nism with the upper portion of the stringingi
tower‘ sectioned off to show construction be
neath it.
Figure 3, a cross-sectional elevation taken sub
stantially on line 3--3 of Figure 2, and drawn
on a slightly larger scale.
Figure 4, a plan view of the stringing tower
and boom extending beyond the edge of the plan
10 view Fig. 2.
Figure 5, a plan view of the reel control mech
rather large crew, and the work is necessarily
slow due to the delay in climbing the poles, the
Figure 6, is a side elevation of a paying out
delay in securing the correct sag between poles,
sheave; drawn on an enlarged scale;
and the fact that only one wire may be stretched 15
Figure 7, an elevation of a detachable Wheel
at one time,
and axle support; and
‘In view of this, one of the objects of our in
Figure 8, an elevational section of the tower
vention is to provide a mobile platform adapted
support drawn on an enlarged scale.
to support wire reelsand two towers, one for
Similar numerals refer to similar parts in the
stretching the wire at an elevation equal to or 20 several views:
above pole height, and the other supporting a
The ‘vehic1e‘2, is in this instance, represented
platform high enough so that ‘workmen on the
as a trailer consisting of a bed ‘3 supported by
platform will be within easy reach of the cross
wheels 4 and 5.
arm insulators.
vided with knuckle joints 6 joined by rod ‘I and
A further object, is to provide a mobile string
ing platform holding wire reels and provided
with elevated towers so that wires may be strung
directly over the insulators from pole to pole,
drawn to proper tension, and immediately fas
The forward Wheels 4 are pro
25 the draw bar 8 is pivoted and connected to turn
these wheels according to the direction in which
the vehicle is drawn. Ordinarily, the bed is
about 8.feet wide and 32feet long, and the axles
9 and 10 supporting these wheels are 16 feet
30 wide. The bedis positioned on the right hand
A still further object is to provide a vehicle
portion of these axles. The left hand wheels are
adapted to be run parallel'toia line of poles, hav
made in the form of steel drums, provided with
ing a platform carrying a plurality of wire reels,
?llings and draining outlets, H and l2,.respec
mechanism for paying out wire at a given rate,
tively. Water is added to these when necessary
tensioning the wire or reeling it in, together with an elevated stringing tower having an over
hanging boom adapted to place string and'ten
sion a plurality of wires in position on pole cross~
arms, and a workman’s platform elevated to ap
to act as ballast.
The axles Band l9 are attached by bolts 13
to under supports I'5, beneath bed 3, so that they
may be removed and replaced by other axles and
wheels for road travel. Kingpin turn plates 16
proximately insulator height, and adapted to be 40 are also provided at the ends of the bed for at—
swung from an alined position to a transverse
I tachinent to a half truck at one end and a two
position across the pole line; all parts being ar-
‘- wheeled pole trailer at the other.
ranged so that, as the vehicle is driven past a
. The
pole, the wires maybe laid adjacent their proper
grouped generally ‘as follows: At the front is a
carries wire stringing machinery
insulators, and the workman’s platform maybe 45 telescoping ‘stringing tower 20 carrying a boom
swung to a position within easy reach ‘of the in
sulators. Then, as the wires are stretched to
21. Behind this are reels and reel racks 23
‘which are controlled by the paying out and reel
proper tension, they may be directly and imme
ing .in mechanism‘zll driveng'by engine 26, at the
diately fastened to the insulators and the ‘vehicle
.rear is atelescoping lineman’s tower 21.
moved to the next pole.
Other objects will appear ‘hereinafter. We at
tain'the foregoing objects by lmeans of thema
chine, construction and devices illustrated in the
accompanying drawings in which:
Both towers ‘are braced laterally and longitu
EdinaLlly and boom 2| is particularly braced, to
take'the strain ‘imposed upon it, by stay 28 ‘tight
ened by-winch‘ 29.
' The stringing tower is composed of a ‘lower
Figure 1 ‘is 'a side ‘elevation ‘of the machine. 55 ?xed portion ‘consisting of ‘two ‘laterally spaced
steel tubes, 30. An extensible portion working
between these tubes, also composed of two steel
tubes 3|, forms the upper part of the tower.
Guide blocks 32 and 33 welded to tubes 30 pro
vide slide ways for tubes 3| and afford means for
telescoping the two portions of the tower.
Tubes 3| are welded to spacing blocks 34 at their
uper and lower ends.
The lower portion of this tower is braced lat
erally by stays 35, and longitudinally by com
pression braces 36 and 31.
The ends of these
members as well as the foot piece 38, on the bot
tom of this portion of the tower, are secured by
shafts 82 supported on bearings 83 at the lend
end and by hollow shafts 86 at the right.
Plates 85, having projecting pins 89 adapted
to engage in holes in the ends of each spool are
carried on shaft 86 into which the removable
shafts 82 fit. The two shafts are joined by thru
bolts 81. When a spool is to be changed bolt
81, on its shaft, is removed and its shaft 82 pulled
out to the left. Filler block 88 is then removed
10 and the spool 88 slid to the left to disengage pins
69 on plate 85. ‘When the new spool is remounted
‘it is held against plate 85 by block 88. The pins
89 lock the spool to plate 86 on shaft 86 and ?ller
block 88 checks the spool against the plate.
All spools may then be controlled by paying
out and reeling mechanism to suit conditions of
stringing. This is done by controlling shafts 86.
These shafts may be rotated in either direction
pins 39, running thru suitable blocks 48 on bed
3 to afford means for detachment and erection
of the tower.
The upper portion of the tower is braced lon
gitudinally by the extensible truss 4| formed by
thru gear shift boxes 90. The center or driving
a cable attached at its top running over the
spreader 42 and tightened by the winch 43 at the 20 shafts of the group receives power thru shaft 9|,
directly from engine drive shaft 92. The outer
shafts are driven by means of chains 93 and 94.
The horizontal, transversely extending, boom
The engine 26 drives shaft 92 thru gear shift 95
2| is supported in upper block 34 at the top of
in either direction and at varying speeds. Cat
tubes 3|. Its longer arm extends out over the
head 96 is placed on shaft 82 for general utility
right hand side of bed 3 as shown in Fig. 4 and
purposes, and is not necessarily connected with
is prevented from swinging to the rear by cable
the reeling mechanism. A brake 91 is placed on
28 attached to its left end. The lineman’s plat
each of the reel supporting shafts 86. This is
form tower 21 is constructed in much the same
simply constructed by a spring tensioned looped
manner. Two steel tubes 58 are separated by
portion of a belt running over a V pulley keyed
blocks 5| and removably attached to the bed 3.
These tubes are braced laterally of bed 3 by tubes
to the shaft.
With this mechanism it is possible to control
52, and longitudinally of bed 3 by braces 53. A
all spools as a group by means of shift 95, or
pair of tubes 54 joined at their ends slide in
any one or two by their individual shifts 98.
blocks 5| between the outer tubes to attain a
telescoping effect. On the upper portion of 35 Snarling is prevented by brakes 91, and wire ten
sion by the brake loaded sheaves 13, 14 and 15.
these tubes two circular plates 55 comprise bear
The brakes on these latter are made similarly
ings to support cylinder 63 to which is attached
to brakes 91 using a V pulley and a loopof V
platform 56. Rings 64 within this cylinder turn
belting fastened at the base at one end, and held
on these plates. Telescoping action is obtained
taut by a spring at the other.
by a cable 51 which is attached to the upper
The machine is assembled by erecting both
block 5| on tubes 58, passes under a sheave not
towers and extending the upper portions to the
shown at the lower end of tubes 54,- and is at
height desired. This includes operation of ele
tached to a hand winch 55 on lineman’s plat
vation winch 66, truss winch 46; and elevation
form 56. The pivotal position of the platform is
winch 55. The stringing boom is then tensioned
controlled by a crank and gear 58 on the plat
by winch 29. Full spools are placed on their
form acting on a crowngear 59 attached just
respective shafts and the wire wrapped one turn
above the upper supporting plate 55 on tubes
over the tension sheaves 13, 14 and 15, thence
54. The platform 56 includes a rectangular ?oor
over the bending sheaves 19, 1| and 12, and lastly
60 attached to the lower portion of the cylinder
over the stringing sheaves 61, 68 and 69. The
63 and a railing 6| attached to the upper end
wire is indicated by. dotted lines 98 in Figs. 3 and
of this cylinder.
4. Wheels 4 and '5 may then be ?lled with water
The forward or boom carrying tubes, are given
ballast and the whole machine towed along a line
telescopic action by a cable 45 attached to their
of poles to be strung.
lower ends, running up over a sheavev46 on top
Bed 2 is run so that the stringing sheaves run
of tubes 30 and down to a hand operated ratchet
over the tops of the poles with the sheaves paying
winch 66.
out the wires to be strung in alined position with
Boom 2| carries three stringing sheaves 61, 68
the insulators |0|, I02, I83, on pole I88. The
and 69 on its outer right hand portion, these
sheaves are adjusted along boom 2|, accordingly.
are positioned relative to bending, sheaves num
bered 16, ‘H and 12, respectively, and these‘ lat
ter are positioned in proper position relative to
three paying out or brake sheaves 13, 14 and
60 After the wires are anchored to an end pole the
device is drawn to a point just beyond the next
pole and stopped. Each wire, or all wires, as nec
essary are‘drawn to proper tension; the lineman’s
15, supported on a transverse shaft 16 attached
platform is then swung around to a position in
by a suitable bracket to the lower part of tubes 65 front of the pole just passed, and a workman on
the platform ties the Wires to the insulators. The
The device here illustrated is adapted to string
device is then drawn ahead to the next pole and
three wires at one time. Wire of the type here
the operation repeated. Thus the wires are ten
concerned comes wound on spools 88 ofaffairly
sioned and tightened as theyare strung from pole
uniform size. These spools mustbe supported
so that the wirefwill vunwind evenly, passing over
the paying out. sheaves 13,14 and 15,. and so
that they are held against unwanted free rotation
such as would allow snarling. To support these
To thosefamiliar with the art it will be at once
apparent that a great deal of time and labor is
saved by this method. Obviously where the
ground is rough and broken the machine cannot
spools ‘there are three removable longitudinal 7.5 be used. Its useis-con?ned to long level stretches
of terrain where a wheeled trailer, such as de
scribed, can be drawn. In these areas the mech
the forward end of said bed, a stringing boom
attached to the top of said tower, having means
for bracing and adapted to extend laterally be
yond the side of said bed, a telescoping line
man’s tower attached to the rear of said bed,
a platform pivotally mounted thereon having con
anism also adapts itself to reeling in lines that
are to be taken down. The method is the reverse
of the stringing process, and wire is not spoiled
by cha?ng and snarling as when laid on the
Since many changes and modi?cations may
suggest themselves to those familiar with the art,
we wish to be limited only by the following claim.
We claim:
The wire stringing machinery, including in
combination a wheeled vehicle, having axles with
ballastable wheels laterally offset from said ve
hicle body, a bed removably and adjustably
mounted thereon, and adapted for trailer trans
port, a telescoping stringing tower mounted at
trol mechanism thereon for controlling the piv
otal position and elevation of said platform, and
wife handling mechanism positioned on, said bed,
including removable wire reels, mechanism in
cluding a power unit for rotating said reels, means
for brake controlling said reels, independent of
said power plant, brake controlled paying out
sheaves, and stringing sheaves, adjustably mount
ed on said stringing boom.
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