GTE BEEG'GREN , O. G NELSON - G_ E, BERGGREN ETAL
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Oct. ‘12, 1943. G_ E, BERGGREN ETAL 2,331,648
‘STAND TWISTING APPARATUS
7 Filed July 2:, 1942 4 SheetseSheet 1
/N 1/5N TOES
GTE BEEG‘GREN
, O. G NELSON
19 7'7'OE/VE)’Och 12& 1943- G. E. BERGGREN 511m.‘ ~ 2,331,648
STAND TWISTiNG APPARATUS
Filed July/‘23, '1942 4 Sheets-Sheet 2
Q‘) /N VEN Toes .
Q \Q GE. BEEG‘GEEN
Y b: N O. G. NEL SON
5’? Z’
‘ 19770 NE)’Patented Oct. 112.1943 ‘ _
2,331,648
UNITED‘ ' was, PATENT‘OFFICE " I
. 213315-48 ., . .
STRAND 'TWISTING APPARATUS
George E. Berggren and Oscar G. Nelson, Balti
more, Md., assignors toWestern Electric Com
pany, Incorporated, New York, N. Y., a corpo
ration of New York‘
Application July 23, ~194.2, Serial No.- 452,026
.5 Claims. (Cl. 57-58)
_This invention relates to strand twisting ap-~ and the ?yer being rotated 90° from the position
paratus and more particularly to apparatus for shown in Fig. 1; ‘ ‘
twisting relatively resilient and non-resilient Fig. 4 is a transverse vertical sectional view
. strands into a cable. on substantially the same scale as Fig. 3, taken,
It is an object of the present invention to pro along the line 4-4 of Fig. 2 in the direction of
vide a simple and e?icient apparatus for twisting the arrows and showing some of the means for
strands into a cable. ' g 0 - applying' tension to the strands as they are with
' In accordance with one embodiment of the I
drawn from the supply spools; '
invention as applied vto an apparatus ‘for twisting Fig. 5 is an irregular plan sectional view taken
a combination of steel and copper wires into a substantially along the line 5,—5 of Fig; 4 in the
cable, an apparatus has been provided wherein’ direction of the arrows and showing the method
a plurality of wires are carried around a plu of supporting the supply spools in the cradle;
rality of supply spools by means of a ?yer which Fig. 6 is a fragmentary detailed view of the
twists them into a strand, means being provided 7 sheave for untwisting a section of the cable and
for maintaining a predetermined tension on the applying additional twist tov another section'of
wire drawn from the supply spools. The supply ‘ the cable to give it the desired'lay; .
spools rest in-a cradle which maintains itself in Fig. 7 is a sectional view taken substantially
position by its own weight, being suspended‘ on along the line 1-1 of Fig. 6 in the direction of
trunnions, through one of which the strands of the arrows; '
wire pass to the ?yer. Outside the cradle and 20 Fig. 8 is an enlarged detail sectional view of a
removed from the path‘ of the ?yer, there is pro part of the control mechanism of the apparatus; I
vided a sheave freely rotatable about its own and ' '
axis and driven to rotate around the axis of, the Fig. 9 is a fragmentary sectional view taken
cable as-the cable is taken up and distributed ‘substantially along the line 9-9 of Fig. 8 in the
on a takeup reel, a pass of ' the cable being 25 direction of the arrows. .
wrapped around the sheave. This sheave is driv By reference to the drawings, it will be noted
' en in a direction opposite to the direction of ro that as seen particularly in Figs. 1 and 2, the
tation of the ?yer whereby the strand‘ .of' cable . apparatus comprises three principal parts-a ?y
is twisted tighter than the required lay between er unit I5, ‘a post former unit it, a'gaging unit.
the ?yer and sheave and untwisted an amount 30 I1, and a‘ takeup unit l8. All ofthe various'units 'j
equal to the excess twist between the sheave and of the apparatus are driven by a motor l9, which.
a capstan which draws the strands forming the drives a gear reducer 20, which may be of any 5
cable from the supply spools. ‘ suitable construction adapted‘ to rotate ‘a'pair
In this apparatus, there is provided a gaging of shafts 2| and 22 at predetermined speeds and‘
‘ die, through which the stranded cable passes after 35 in timed relation one with another. The shaft
it has been twisted the desired amount.- This ‘ 2| has ?xed to ‘it a pair of driving gears 23 and
die normally rides on a cable encircling it and 24 and-is iournalled in bearing blocks 25 and 26
when the cable is kinked or has a large undesir which are slotted latf2l and 2,8" to ‘receive the
able lump on it, the gaging die will move with gears 23 ‘and '24: ' Also mounted in the; bearing
the cable and actuate an electrical switch to in 40 blocks 25 and 26 are intermediate'gears 29 and
terrupt the operation of the apparatus. ‘ _ ‘so, which: mesh with the driving'gears 23 and 241
A~better understanding of the invention may Q and with gears 3i and 32 formed on: ?yer, supé v
be had by reference to the accompanying draw-. porting studs.“ and '34, respectively. (Fig. .3). ‘
ings, wherein ~ The ?yer supporting studuhas a central aperQ'
Fig. 1 is a general plan viewof apparatus em‘-_.45 ture “extending axially through it ‘and is pro-1
bodying the invention, the housings of parts of - vided with a slot as in‘ which aguidepulley a1 ‘
theapparatus being ‘removed to illustratemore is freelyv rotatable. The ?yer supporting stud
clearly the general location of the parts; 33 has opposed; ?yer arzns'38 and as fixed to it’
Fig. 213 a side elevational view of theIappara-Y between which an‘hs ‘there ‘is journalled a guide:
tus shown in Fig. 1; ' 50 sheave 4D.‘ This‘r'sheave whis‘adaptedito' receive
Fig. .3 is alongituclirial vertical sectional ' the cable‘ formed inlthe, apparatusand guide it to‘ ‘
onran enlarged scale. taken substantially along
the line-‘3+3 of Fig. 1 in the direction i-ofith'e 'ZI‘he ‘?yer supporting vvstud 54 is slotted as ‘shown ,ji
arrows..'parts- being broken away to illustrate. 6 atjll in av manner somewhat simil‘arsltothbit: de‘-‘
more? clearly those parts positioned behindfthem .6 scribeduin“connection with the studél?"2 2,331,848
Extending upwardly from each of the channel
tioned in the slot shown at 50 is a guide member members 88 is a bearing support H2 or H3, the
5I, which guides a cable, that has been passed four bearing supports H2 adjacent the middle
through a tube 52 coaxial with the ?yer sup of the cradle 88 being of identical construction
porting stud 34, to a sheave 53 mounted between and the four bearing supports H3 at the ends
?yer arms 54 and 55 ?xed on opposite sides of of the cradle being of identical construction.
the ?yer supporting stud 34. The ?yer arms 38 These bearing supports have bearings H4 (Figs.
and 38 are spaced apart by blocks 58 and 51 and 3, 4 and 5) at their upper ends, which are similar
the ?yer arms 54 and 55 are spaced apart by to the bearings 88 on the brackets 88 and 81
blocks 58 and 59. The ends of the ?yer arms 54 and each of the bearings H4 and the bearing 88
and 55 and 38 and 38 away from the sheaves 53 are provided with quick acting snap locks H5
and 54 are provided with weights 88 and 8I to pivoted at one side of the bearing and having a
counter-balance the sheaves 48 and 53 so that spring cylinder resiliently urged into an aperture
the portions of the ?yer arms extending on op H8 (Fig. 5) in the bearing H4 to hold the spool
posite sides of the studs 33 and 34 will be bal supporting shafts or arbors in place. The arbors
anced. The end of the ?yer supporting stud 34,
which extends toward the other ?yer stud 33 which support the spools 85, 88, 81, 88 and 83
are all of the same construction and, as illus
is provided with an end portion 82 apertured to trated in Fig. 5, the arbor designated H1 has a
receive the tube 52 and having a tubular axial pair of spool supporting collars H8 and I28
projection 83 thereon. The tubular axial pro mounted upon it. The spool supporting collar
jection 83 has set into it a stranding die 84, I28 is ?xed to the arbor II1 bymeans of a set
through which the wires which make up the cable screw I2 I, whereas the collar I I8 is provided with
pass to the guide member 5|. ' an inwardly extending pin I22 adapted to engage
The projection 83 cooperates with a projection
85 on the ?yer supporting stud 33 to form trun in an aperture in the ?ange of the spool 85. The
nions for supporting a cradle, designated gen collar H8 is provided with an aperture I23 into
erally by the numeral 88, in position between the which extends a pin I24 ?xed in a brake drum
?yer arms where the cradle will remain sub-_ I25. The brake drum I25 is, in turn, attached
stantially stationary during the rotation of the to the arbor- H1 by means of a set screw I28.
flyer arms about the cradle. The cradle 65 in
This assembly, comprising the arbor, the spood
cludes a base framework made up of a longitu supporting collars, the brake drum and the spool
dinally extending relatively heavy channel mem 85, may be dropped into the bearing notches in
the bearings H4 and locked in place by means
ber 61, which has extending out from the sides
s of the snap locks H5. It should be noted that
of it and welded to each side of it four channel‘
member supports 88-88. The main longitudi the intermediate ones of the snap lock I I5 extend
nally extending channel member 81 has suitably over the ends of two arbors and lock them in.
?xed to it, for example, by welding, a pair of place.
plates 88 and 18, which are provided with aper-' Cooperating with the brake drums I25 are
tures H and 12 in alignment with similar aper brake blocks I21, as shown most clearly in Figs. 4
and 5. The brake blocks are formed to conform
tures 13 and 14 formed in bearing members 15 to the shape of the brake drum I25 and are
and 18. The trunnion projections 53 and 85 enter 40
mounted on brake arms I28. Each brake arm
the aligned apertures 13 and H and 12 and 14 I28 is pivoted on a stud shaft I23 extending from
and serve to support the crade 65. Gusset plates the bearing support H2 or H3, most closely ad
11 serve to brace the cradle structure by engaging jacent the brake drum I25. Extending down
with the main longitudinally disposed channel
member 81 and with the pair of plates 68 and 18. 45 wardly from each brake arm I28 is a lever I38,
which maybe formed integrally with the brake
In the cradle formed by this structure, there arm and which is interconnected by means of a
are mounted seven wire supply spools 85, 88, 81, relatively heavy coil spring I3I with a threaded
88, 88, 88 and 8|, each of which is provided with rod I32. The threaded rod I32 (Figs, 4 and 5)
a brake to be described more in detail herein-‘ extends through a pivot block I33 pivotally
after and from which wires may be directed to mounted on the upper end of a lever arm I34
a lay plate 82, which is positionedto properly and the rod I32 may be locked'on the pivot block
guide each individual strand of wire into the I33 by lock nut assembly I35. The lever arm
stranding die 84. The lay plate 32 is mounted I34 is formed integrally with a sleeve I38
upon a flat portion 83 formed on gusset plates mounted on a pivot rod I31. The sleeve I38 also
11. The spools 85 to 38 are each mounted in a b5) has formed integrally with it a downwardly ex
similar manner on the cradle 88 and are pro tending arm I38 having an abutment I38 resil
vided with tension controlled brakes whereas the iently mounted in it, the abutment normally being
spool 8 I, which supplies the core or central strand urged away from the arm I38 by a spring I48.
of the cable, is provided with a drag brake 85 Thus, the sleeve I38 and parts carried by it will
(Fig. 3). The spool 8I is mounted between 60 normally be urged in a direction to apply a de?
brackets 88 and 81 (Figs. 1, 2 and 3) which ex nite braking pressure to the brake drum I25
tend inwardly of the cradle from end plate 88. through the action of the brake block I21. How
Each of these brackets 88 and 81 is provided with ever, the sleeve I38 forms part of a sheave sup
a bearing portion 38 having a bearing notch 88 porting framework I“ (Fig. 5) which comprises
into which a shaft I88 may be set, The shaft the sleeve I38, a complementary sleeve I42, an
I88 has a brake drum I8I suitably ?xed to it ~and interconnecting cross member I43, and a sheave
the spool 3I is suitably ?xed to the brake drum , supporting rod I44. These parts may be suitably
I8I. Encircling the brake drum'I8I is a brake secured together or the sleeves I38, I42 and cross
band I82 having one end attached to a pin I83
and the other end resiliently urged toward the 70 member I43 may form parts of a casting in which
pin I83 by a spring I84, the tension of which a rod I44 may be suitably mounted, end plates
may be adjusted by a tension adjusting nut I85.
I45 and I48 extending from the sleeves I38 and
I42 and being interconnected by the cross mem
‘ A strand of wire I88 may be withdrawn from the
spool 8I and fed directly through the lay plate 82 ber I43.
15 The pivot rod I31 has ?xed to it a toothed
to the stranding die 84.2,881,648 3
clutch member I41 and has surrounding it a be stranded in the cable, the post former unit It
pair of clutch collars I48 and I48. The clutch is used to apply an additional twist to the wires
collars I48 and I48 are interconnected with the between it and the ?yer and to untwist the cable
sleeves I35 and I42 by coil springs I50 and I5I,. a predetermined amount equal to the additional
respectively, which encircle the pivot rod H1 twist'betweenit and the takeup unit l8. The
and are under compression to oppose the action amount of additional twist‘ put into the cable and
of the spring I40, thus tending to rock the sheave then taken out depends upon the resiliency of
supporting framework downwardly (Fig. 4). It the wire. I I '
will be understood that there is a sheave support In accordance with the preferred form of the
ing framework I4I associated with each of the 10 invention, the gear 28 is mounted upon a shaft
supply spools 85 to 88 and that each of these I55 which extends into and drives a gearv reducer
sheave supporting frameworks are constructed I55 for driving a capstan ‘I 51 at a definite rate of
in exactly the same manner as the one most > speed and insynchronism with the rotation of
. clearly illustrated in Figs. 4 and 5. Furthermore, the ?yer. In passing from the ?yer unit to the
each of the supply spools is provided with a capstan I51, the cable is twisted and then un
brake drum I25 arranged in thesame manner twisted an equal amount by post former unit I5,
as the spool 85. which will now be described. As most clearly
The vsheave supporting rod I44 has slidably and shown in Figs. 6 and 7, the post former unit I5
rotatably mounted upon it a guidesheave I53, is driven from the shaft I55 by a chain I58 en
which cooperates withan upper guide sheave I5I 20 gaging a sprocket I58“ The chain I58~ engages
slidably and rotatably mounted on a rod I52 and drives a sprocket I10 ?xed to a rotatable
which extends between the plates 58 and 10, member "I suitably supported in a bearing I12,
there being two of the rods I52"provided, one at which is,'in turn, mounted .upon the housing of
each side of the cradle 55 for supporting the guide the gear reducer I55. The rotatable member "I
sheaves associated with the various wire supply is provided with an axial passage I 13 and is suit
spools on their respective sides of the cradle 55. ably held for rotation in the bearing I12. At the
From the foregoing, it is believed to be appar ‘ right end (Fig.5) ‘of the rotatable member "I,
ent that by suitably adjusting the tension in the a slotted portion . I14 is provided for supporting
various springs, the tension under which the a post former sheave I15. The sheave I15 is
wires'drawn from the supply spools 85 to 80 may 30 freely rotatable about a shaft I15 and rotates in
be controlled and that the guide sheaves I53 and a slot,I11 formed in the portion I14. From the
I5I will slide back and forth on their respective foregoing, it is believed to be apparent that a
I supporting rods to guide the wire as it is drawn cable I18 formed of wires'drawn from the supply
from various supply spools. After the wire has spools 85 to j8I ‘will be directed from the ?yer
been passed over the guide sheave III and around unit I5 to the post former unit I5, where it will
the guidesheave I58, it will be directed to an , be passed around the sheave I15. Rotation is
idler pulley member I50, three of which are pro imparted to the rotatable member I1I,which will
~ vided in the apparatuspeach guide member I50 carry the sheave I15 bodily about the axis of the
serving to guide the two wires drawn from sup~ . cable I18 as the cable I18 is drawn through the
ply spools on opposite sides of it and to direct 40 rotatable member "I and as the cable I18 ro
vthem to the lay plate 82. The guide members tates the freely rotatable post former sheave I15.
I50 are freelyrotatable between the arms of U_ Thus, the cable of stranded wires is twisted by
shaped brackets I5I extending in a horizontal di the ?yer the exact amount desired in the ?nished
rection from upright support brackets I52, the cable and is twisted tighter than the required
upright support brackets I52 being mounted on 45 lay between the ?yer unit I5 and the post former
the main channel member 51 of the cradle 55._ unit I5 ‘by the operation of the post former‘unit
As the wires are drawn from the various supply I8. Since the cable cannot twist at its takeup
spools ‘85 to 8| and directed to the lay plate 82 end, the cable is untwisted by the post former
and thence through the stranding die 54, they will unit ‘I5 anamount equal to the difference be
have two twists imparted to them between the 50 tween the required lay as applied by the ?yer and
lay plate 82 and the guide pulley 31 for eachro- , the lay applied by the post former unit 15 to set
tation of, the ?yers about the cradle 55. , the wires in the cable so that the ?nished strands
The wires fed from the supply spools'85, 85, 88, of wire. are “dead” and will not tend to untwist.
88 and 9| are copper wires which are to be as From the post former unit I5, the wire is di
sembled with steel wires drawn from the supply 55 rected to the pulling ‘capstan I51 and from the '
spools 81 and 90 and due to the difference in capstan is, in turn, directed upwardly to a guide
resiliency of the copper and steel wires, and espe sheave vI82. -Intermediate the guide sheave I82
cially due to the resiliency of the steel wires, the . and the capstan I51, there is provided'a control
cable would tend to become untwisted if it were device or gaging unit I1. This unit, as most
simply fed onto a takeup reel after being twisted clearly shown in-Figs.‘ 8 and 9, comprises a suit
in the apparatus described hereinbefore, and, ac 60 able switch mechanism I83 for interrupting the
cordingly, in following the present invention, the ' power supply to the motor I8 when an undesir
cable composed of the strands withdrawn from able lump or kink occurs in the‘ cable I18. The
the supply spools 85 to 9| are‘ directed out ' switch I83 has an'actuator arm. I84'extending
through the aperture 35 in the?yer supporting
65 from it, which is spring biased ‘in any suitable
' stud 33 and are directed to the post former unit manner to remain in the position shownin Fig". 3.
I5 before being directed to the takeup unit I8. Mounted, on‘ the’ end- of thefactuator arm I84
If all of the wires on supply spools 85 to III are ls'a roller I 85,‘ which lies in the path of- a bell
"dead” copper wires, the cable‘thus formed might crank'lever I85.‘ Thebell crank lever 185 is
_ be directed to any suitable takeup device, such as pivoted on a pin I81 and has one ‘of its arms
the takeup unit I8, to be described hereinafter, in engagement with'the‘roller I85, whereas its
without untwisting the cable and the'desired lay other‘arm has a‘ slot ‘I88 formed init through
of the twisted strands could beset into the'cable whi'chthe cable I18 passes. ‘' The bell crank lever
* simply by using the‘?yer described hereinbefore. I85’Iis freely rotatable ‘about the pin" I81, which,
However, when relatively resilient wires are to 75 in turn, is mounted upon a bracket I89 which4 2,331,648
extends upwardly from the bearing I12 and sup than the desired tension, the sheave I53 asso
, ports the bell crank lever I88 and switch mech
ciated with that spool will move downwardly
anism I83. In the operation of the apparatus, . and, in so doing, will rock the sheave support
a gage sleeve I90 is placed on the cable and ing framework “I about the rod I31. When the
normally rides on the cable between the capstan sheave supporting framework “I is rocked
I61 and the bell crank lever I85. The central downwardly, the threaded rod I32 will be drawn
aperture I9I of the gage sleeve is of a diameter toward the center of the cradle 55 and will, there
such that cable I18, with the proper contour fore, rock the brake arm I28 towards its asso
and size, will pass freely through the sleeve but ciated brake drum I25 to retard the rotation of
when a kink or irregularity in the cable engages 10 the supply spool with which it is associated.
the sleeve I90, it will move the sleeve upwardly Similarly, if the braking pressure of the brake
with it in the direction of the arrow (Fig. 8) to block I21 on the brake drum I25 exceeds the de
overcome the spring pressure of the switch mech sired amount, the sheave supporting framework
anism I83 and cause the actuator lever I84 to I4I associated with that particular wire supply
be rocked in a clockwise direction when bell I spool will be rocked upwardly to release the brake
crank lever I85 is rocked in a counter-clockwise arm I28 from the brake drum an amount corre
direction (Fig. 8) by the sleeve I90, thereby to sponding to the amount that the sheave support
interrupt the operation of the driving motor I9 ing framework is rocked out of its normal po
Thus, the tension on the wires being
and stop the apparatus. - ‘sition.
drawn from the supply spool may be maintained
After passing over the guide sheave I82, the
cable passes to a distributor sheave I93 and
substantially constant and the guide sheaves I53
thence to a takeup reel I94. The distributor and I5I will slide-back and forth on their re
sheave I93 may be moved transversely of the spective rods I44 and I52 to withdraw the wire
takeup reel I94 by any suitable mechanism, for evenly from the supply spools. The tension on
example, a screw type traverse rod I95. The , the strands of wire will thus be maintained con
takeup reel I94 and traverse rod I95 are driven stant and formation of the cable will be con
by the shaft 22 through any suitable speed re tinued until the supply of wire on the supply
'duction mechanism, such‘ as that illustrated
spools is exhausted, at which time the operation
of the machine may be stopped manually. How-1
at I95.
A better understanding of‘ the invention may 30 ever, if a kink or other irregularity occurs in the
be had by reference to the following brief de cable, the machine will be automatically stopped
scription of the operation of the apparatus. ‘In by the kink or other irregularity engaging the
starting the apparatus, wires may be withdrawn gauge sleeve I90 and carrying it upwardly to
from each of the supply spools 85 to 9|, the wire actuate the switch I83 to interrupt the supply
from spool 9| being entered directly into the circuit to motor I9. ' . -
lay plate 92, whereas the wires from the other What is claimed is:
wire supply spools on the cradle 55 will be drawn 1. An apparatus for twisting strands into a
therefrom, ?rst passing over guide sheave I5I cable comprising a, cradle for supporting a‘ supply
‘and then'down to tension controlling guide of strands, a, ?yer rotatable around said cradle
sheave I53 and up to their respective idler guide 40 to impart two twists to the strands as they are
members I50. From the idler guide members withdrawn from the supplies on the cradle, a
I60, the wires may be fed through the lay plate capstan for pulling the strands from the supplies
92 and the stranding die 54, after which the and over the flyer, and a post former interposed
group of ‘wires may be directed through the guide between the ?yer and the capstan for applying a
member 5I and over guide sheaves 53 and 40 to twist to the cable between itself and the ?yer and
the guide pulley 31. From the guide pulley 31, for untwisting the cable between itself and the
the wires are directed to the post'forrner sheave capstan. _ _
I15 and thence through-the rotatable member 2. In a strand twisting apparatus, a cradle, a
I1I, which is in alignment with the capstan I61. plurality of spools containing strands wound
The wires are wrapped several times around the 50 thereon supported by said cradle, a ?yer rotat
capstan I51 and then passed through the gage able around said cradle, a guide passage through
sleeve I90 and over sheaves I82 and I93 to the a portion of said ?yer, a guide plate for directing
takeup reel I94. After the apparatus has been strands from the supplies to said passage in the
prepared in this manner and the ends of the flyer, an idler roller positioned between the guide
. wires have been suitably secured to the takeup 55 plate and the supplies of strand for directing the
reel I84, motor I9 may be started in operation strands to the guide plate, and a pair of freely ro
to drive the flyer arms 39, 39, 54 and 55 to cause tatable and freely slidable sheaves cooperating to
two twists to be put in the wire for each revo guide a strand from a supply to the guide roller.
lution of the flyer between the lay plate 92 and 3. In a strand twisting apparatus, a cradle, a
the post former unit I5. The speed of rotation 60 plurality of spools containing strands wound
of the capstan I51 and takeup reel I94 will de thereon supported by said cradle, a ?yer rotat
termine the number of lays or twists of wire per able around said cradle, a guide passage through
foot length of cable I18 and the wires will be a portion of said ?yer, a guide plate for directng
twisted exactly as tightly as is desired in the strands from the supplies to said passage in the
ultimate cable by the ?yer. Then, due to the 65 ?yer, an idler roller positioned between the guide
action of the post former unit I5, the cable will plate and the spools of strand. for directing the
be overtwisted between the post former and strands to the guide plate, a pair of freely rotat'
flyer and will be untwisted between the post able and freely slidable sheaves cooperating to
former and capstan I61, so that when the 'cable guide a strand from a spool to the guide roller,
reaches the capstan, it will have the required 70 an oscillatable sheave supporting framework for
twist ‘as applied by the flyer and will still be supporting one of said freely rotatable and slid~
“dead” and will not tend to untwist-as it is fed able sheaves, and means actuated by the sheave
to and wrapped around the takeup ‘reel I94. supporting framework for controlling the tension
If there is a tendency for the wire to be drawn in the strand.
from any one of the spools 85 to 90 under less 75 4. In a strand twisting apparatus, a cradle, a7 r 2,831,648 5
plurality of spools containing strands wound 5. A tension controlling device for a strand
thereon supported by saidcradle, a ?yer rotat handling apparatus comprising a brake, a means
able around said cradle, a guide passage through for controlling said brake including resilient‘
a portion vof said ?yer, a guide plate for direct means for normally urging said brake to apply
ing strands from the supplies to said passage in a predetermined braking force, a lever for vary
the ?yer, an idler guide roller positioned between ing the e?ectiveness of said resilient means, a
the guide plate and the supplies of strand for framework connected to said lever for actuating
directing the strands to the guide plate, a pair of it, and a sheave freely rotatable and slidable with
freely rotatable and freely slidable sheaves coop respect to said framework, said sheave being re
erating to guide a strand from a spool to the 10 sponsive to the tension in a strand being handled
guide roller, a sheave supporting framework for to control the braking‘ force applied to the strand
supporting one of said freely rotatable and free supply.
ly slidable sheaves, means for normally urging , GEORGE E. BERGGREN. ’
said framework to a predetermined position, and OSCAR G; NELSON.
means‘operable under control of said framework 15
for maintaining the tension in a constant.You can also read
