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Патент USA US3072360

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Jan- 3, 1963
G. c. ANDERSON EI‘AL
3,072,350
BUILDER MECHANISM
Filed May 9, 1961
3 Sheets-Sheet 1
JfMJZ M
Il UlIHl I
W/
/
Jan- 8, 1963
G. c. ANDERSON ETAL
3,072,350
BUILDER MECHANISM
Filed May 9, 1961
3 Sheets-Sheet 2
Jan. 8, 1963
s. c. ANDERSON ETAL
3,072,350
BUILDER MECHANISM
Filed May 9, 1961
3 Sheetvs-Sheet 3
United States Patent O?hce
7
3,072,350
Patented Jan. 8, 1963
2
1
FIG. 1 is a somewhat fragmentary View of the builder
3,0723%
BUILDER MEQHANESM
.
Gordon C. Anderson, Clemson, 5.C., and Gar?eld B.
lngraham, Falmouth, Maine, assiguors to Seen-Lowell
Shops, Boston, Mass, a corporation of Maine
Filed May 9, ‘1%1, Ser. No. ltlh?hi)
14 Claims. (Cl. 242-261)
The present invention relates to improvements in a
mechanism for a twister frame provided in accordance
with the present invention looking from the inside toward
the end of the machine and showing particularly the
builder cam and follower mechanism, the pick motion,
the Windlass shaft, and the compensating tension device;
FIG. 2 is an enlarged detail sectional view of the
Windlass shaft, the tapes connected thereto, and the
winddown mechanism shown in FIG. 1;
twister frame having traversing elements mounted for 10 FIG. '3 is a detail sectional view on an enlarged scale
of the pick motion taken on a line 3—3 of FIG. 1;
vertical reciprocatory movements for winding strand on
FIG. 4 is 'a view looking from the left of substantially
a package, and more particularly to an improved builder
motion for producing traversing movement of said bra
versing elements.
the parts shown in FIG. 1;
'
FIG. 5 is a sectional view taken on a line 5—5 of
A builder motion suitable for use in a twister frame 15 FIG. 3 to illustrate particularly the pawl and ratchet
comprises normally a builder cam and follower means
and shieldmechanism of the pick motion;
FIG. 6 is a sectional view taken on a line 6-6 of FIG.
for imparting a reciprocatory movement to said travers
ing elements, a pick motion by means of which a stepped
3 toshow particularly the overrunning clutch interposed
advance or dislocation of said reciprocatory movement
between the pick motion and Windlass shaft; and
of the traversing elements for building the pack-age is 20 ‘ FIG, 7 is a somewhat diagrammatic view on a small
scale illustrating the manner in which ring rail and as
effected, a Windlass shaft disposed transversely of the
sociated parts are supported from the Windlass shaft by
machine, and tape connections therefrom extending
means of tapes.
lengthwise of the machine by means of which the tra
versing elements are supported, and a compensating take
up device which acts on the Windlass shaft to'counter
balance the weight of the traversing elements trans
mitted to said shaft through said tape connections.
It is a principal object of the present invention to
provide for use in a twister frame an improved builder
The invention ‘is herein disclosed as embodied in a
25 twister frame which may be of ordinary description con
sisting of a long frame 20‘ including a rail 22 which
provides mountings ‘for a series of rapidly rotating
spindles. Inasmuch as the spindles together with their
driving mechanisms are well known and more speci?cally
mechanism which is of simple, compact construction, 30 no part of the present invention, no particular illustra
and which will operate with a high degree of accuracy
‘ tion or description thereof is included herewith.
and e?iciency.
The traversing elements by means of which the threads
are guided‘ to the spindles to build up packages thereon
comprise a pair of ring rails 24 each having mounted
provide an improved pick motion having differential
gears and a planetary control gear by means of which 35 thereon ‘along the length of the machine a series of
spinning ring holders 26, a pair of balloon control ring
oscillatory and stepped advancing movements are im
. support bars 28 on each of which are mounted a series
parted to the builder shaft and traversing elements sup
ported thereby.
of balloon control rings '30, and a pair of thread guide
More speci?cally it is an object of the invention to
It is a further object of the invention to provide a
supporting rails 32 on each of which are mounted a
novel and improved torsion bair compensating tension 40 series of thread guides 34. The ring rails 24 are sup
ported at intervals along their length by means of tapes
device adapted for maintaining a constant tension upon
36 which extend along the length of the machine and
a member movable over a limited range corresponding
are provided at intervals with extension passing around
with a substantial range of distortion of said bar.
idler pulleys 38. Each tape 36 is secured at the base
It is a further object of the invention to provide an
end to a pulley 40 formed integral with a sleeve 41
improved compensating take-up mechanism for the
builder motion which consists basically of a torsion rod
which is ?xed by means of a pin 42 to a Windlass shaft
of substantial length by means of which an even com
44 which extends transversely across the end of the
pensating takeup pressure is applied against the Windlass
machine.
'
,
The thread guide supporting rails 32 are mounted on
shaft and which is of sufficient strength to overbalance
the weight of the traversing elements referred to, and 50 tapes 46 each of which extends along the length of the
machine and is provided at intervals with extensions
which thus acts to maintain the entire builder system
which pass around supporting rollers 48. The tapes
including the cam and follower elements in ?rm engage
are secured at their base ends to nullevs 59 formed on
the sleeves 41 secured to the Windlass shaft 44.
It is a further object of the invention to provide an
The balloon control rails 28 are similarlv supported by
automatic means for resetting the builder mechanism at 55
tapes 52 which extend alone the length of the machine
the end of the package winding operation when the pack
ages are doifed from the twister frame and the elements
and are provided at intervals with extensions which pass
around supporting rollers 54. Said tapes 52 are secured
of the builder mechanism including the traversing ele
at their base ends to pullevs 56 fast on a sleeve 59 which
ments referred ,to are returned to the initial low starting
position.
'
60 is normallv secured to turn with the Windlass shaft by a
locking device hereinafter to be described.
More speci?cally it is an object of the invention to
provide means for releasing and automatically returning
There is also connected with the Windlass shaft 44 a
compensating tension assemhlv which acts to rotate the
the di?erential pick motion of the illustrated construc
tion to its initial starting‘ position.
Windlass shaft 44 in a direction counter to the bias of the
With these and other objects in view as may here 65 ring rail faves 36. and thread guide, rail tapes 46. Said
compensating tension assembly comprises a chain 66
inafter appear the several featuresv of the invention con
which is connected at its unner end to a pullev 62 formed
sist also in the devices, combinations and arrangement
of parts hereinafter described and claimed, which to
on one of the Windlass shaft sleeves 41. The chain 6ft
gether with the advantages to be obtained hereby will
extends downwardly around a guide roller 64 and is con
be readily understood by one skilled in the art from 70 nected at its lower end to a cam member 66 which is ad
the following description taken in connection with the
justably mounted on a pivot pin 67 between a pair of arms
ment with one another.
accompanying drawings in which:
68, 70 formed on a bracket 71 which is rotatably sup
3,072,350
3
4
ported in a bearing member 76 and is rigidly secured at
vance the output differential gear 106 With relation to the
input differential gear 98.
The operation of the pawls 118 and 120 is controlled
by means of a shield 124 secured by means of a split
clamp 126 to the supporting sleeve member 100 for the
input differential gear 98. The shield 124 is of substan
tial size causing the pawls 118, 120 to be held in a raised
one end to a torsion bar 72 to rotate therewith about the
torsion bar axis. The torsion bar 72 is placed under a
twisting or torsion strain which serves to exert a down
ward bias on the cam member 66 and chain 60 sufficient
to slightly overbalance the bias of the tapes 36 and 52. In
accordance with the invention, a torsion bar is utilized of
substantial length which may be roughly equal to the full
length of the machine, for example, thirty or forty feet.
inoperative position at all times during reciprocatory
movement of the input differential gear except for a small
The cam contour of the cam member 66 is selected with 10 portion of said movement at one end of the stroke when
relation to the characteristics of the torsion bar, the
amount of the counter balance torque, and chain let off
to provide a variable effect lever arm length which will
compensate at all times for variations in the torque exerted
by the torsion bar to maintain a constant counterbalance 15
the pawls are permitted to engage the ratchet wheel 116.
With this arrangement the planet gear normally moves
bodily as a unit with the two input and output differential
gears 98 and 106, operating as a locking device to oscillate
said gears as a unit.
When the ratchet wheel 116 and
during movement of the thread guiding instrumentalities
from the bottom to the top position, and during the corre
sponding untwisting movements of the torsion bar 72.
planet gear supporting frame 114 are held by said engage
ment of said pawls 118, 120 therewith, the planet gear is
rotated by the continued movement of the input differen
While it is possible as above pointed out to plot a cam
tial gear 98 thus producing a small increment of advanc
to maintain a constant counterbalance with respect to any 20 ing movement of the output differential gear 106 with re
given set of conditions, it will be understood that any
lation to the input differential gear 98.
change of said conditions such as would be brought about,
The pick mechanism above described is provided also
for example, by the installation of a new torque rod, will
with means for automatically resetting the pick mecha
necessitate a new cam pro?le. This adjustment is made
nism upon completion of the winding operation as one
with the present construction by adjusting the angular 25 step in conditioning the machine for the winding of new
position of the cam member 66 about its pivot 67, which is
packages thereon. To this end the output differential
accomplished by changing the setting of a stop screw 80 _,
gear 106 is connected by means of a one-way clutch to a
which is mounted in a lug 81 forming part of the bracket
driven member which is in turn connected with the wind
lass shaft assembly above described. The clutch referred
71 for engagement with the cam member 66.
The builder motion which includes the builder cam and 30 to is of the cylinder and wedge type comprising a pair of
clutch rolls 130 mounted in wedge-shaped recesses 132 in
follower assembly and a pick motion by means of which
the inner face of the sleeve hub of a driven member 134
an oscillatory and stepped advancing movement is im-,
loosely mounted to turn on the sleeve hub 108 of the
parted to the tapes and thread traversing elements actu-‘
output differential gear 106. The clutch rolls 130 are
ated thereby includes a builder cam 82 which is mounted
on a continuously rotating shaft 84, and a cooperating fol 35 brought into wedging engagement with the inner and
outer sleeves by the draw-off bias exerted on the driven
lower roll 86 carried on a cam follower lever 88 hori
member 134- in the wind up or winding element raising
zontally disposed beneath the cam 82. The follower lever
direction by the take~up action of torsion bar 72 as here
88 is pivoted at 90 to a ?xed portion of the machine and
inafter more fully pointed out. A chain 140 is attached
at its free end is slotted to receive pivot pin 92 which is
adjustable therein lengthwise at the lever 88. A link 94 40 at one end to the periphery of the driven member 134
and chain 96 connect the cam follower lever 88 with the
input element of a differential pick mechanism by means
of which the oscillatory movement of the builder cam and
follower assembly, modi?ed to produce in addition there
to a small stepped advance in the limits of said move
ments, are transmitted to the Windlass shaft 44, support
ing tapes, and traversing elements for winding a package.
The differential pick mechanism of the present con
struction comprises an input differential gear 98 mounted
on a sleeve member 100 which is in turn freely rotatable V
on an inner sleeve 102 carried on a core shaft 104 of the
pick assembly.
An output differential gear 106 carried on a sleeve
member 108 freely rotatable on the core shaft 104 is
mounted in parallel relation to the input differential gear
98. Both said gears are provided with internal gear teeth,
the output gear 106 having one less tooth than the input
gear 98. A planet gear 110 is arranged to mesh continu
ously with both said gears, being mounted to turn on a
pivot 112 carried by an offset frame 114 attached to the
inner sleeve 102 above referred to.
The position of the planet gear 110 with relation to the
input differential gear 98 is controlled to impart an oscil
latory movement to the output differential gear 106, and
in addition thereto, a stepped advancing movement of the
output differential gear 106 with relation to the input dif
ferential gear 98 for each oscillation of the input gear 98
through connections which include a ratchet wheel 116
secured to the inner sleeve 102 to turn as a unit with the
and at its other end to a pulley 142 which is formed on
one of said sleeves 41 secured to the Windlass shaft 44
by means of a pin 42.
The arrangement of the pick mechanism, builder cam
assembly, the Windlass shaft assembly, the compensating
takeup mechanism and the several operating connections
therebetween is such that the overbalancing bias imparted
by the torsion bar 72 acts normally to keep the follower
lever 88 and roll 86 in operative engagement with the
builder cam 82, engages the overrunning clutch 130, 132
above described, and at the same time maintains a torque
strain on the elements of the differential mechanism which
is normally effective to prevent rotating or Walking of the
planet gear with relation to the input and output differ
ential gears during the reciprocatory movements of the
input differential gear 98.
A further element of the means for automatically reset
ting the pick mechanism comprises a coiled rewind torsion
spring 144 which is wrapped around and extends along
the periphery of the input and output differential gears
98 and 106 being secured at one end to a bracket 146
on the input differential gear 98 and at its other end to a
bracket 150 on the driven member 134. The torsion spring
144 tends to rotate the driven member 134 in the opposite
a direction from the bias exerted by the compensating tor
sion bar 72.
In the winding of a bank of packages on the machine
the continued operation of the pick mechanism will cause
the continuously oscillating output differential gear 106
planet gear supporting frame 114. A pair of pawls 118, 70 and driven member 134 to be gradually moved ahead
120 mounted on a stationary pivot 122 are arranged when
with relation to the continuously oscillating input dif
engaged with the ratchet wheel 116 to lock the ratchet
wheel 116 and planet gear supporting frame against rota
ferential gear 98 in the same direction, as and under the
influence of the bias exerted by the compensating torsion
bar 72. This relative movement of the driven member
tional movement with the input differential gear 98 so that
the planet gear 118 is caused to rotate on its pivot to ad 75 134 and input differential gear 98 winds the reset torsion
3,072,350
5
5
spring which as above noted is‘ of less strength than the
bias exerted by the compensating torsion bar 72.
At the end of the winding operation the machine is
ing down of the Windlass shaft 44 until further move
ment of said driven member 134 is arrested by engage
ment of the stop bracket 150 on the periphery of the
driven member 134 with the cooperating stop bracket
146 on the input differential gear 98.
The invention having been described what is claimed
conditioned for the winding of a new set of spools. This
operation includes the usual clotting of the loaded spools,
and the winding down of the Windlass shaft assembly
including the ring rails, the threaded guide supporting
rails and the balloon control ring support bars prepara
1s:
1. In a twister frame having traversing elements
tory for Winding the new spools. The operating connec
mounted for vertical reciprocatory movement for wind
tions for effecting this winding down operation of the 10 ing strand on a package, builder mechanism for produc
Windlass shaft assembly include said sleeve member 59
ing traversing movement of said traversing elements com
normally connected to the Windlass shaft 44 and a large
prising means constructed and arranged to produce a
gear 156 formed on the sleeve member 59, which meshes
predetermined pattern of cyclical traversing movement
with a small driving pinion 158 on a hand crank shaft
of said traversing element, and a pick mechanism com
160 adapted to be operated by a hand crank 162. The 15 prising a differential device connected between said oscil
sleeve member 59 is operatively connected to rotate the
lato'ry builder motion producing means and said travers
Windlass shaft by means of a cross pin 164 secured
ing elements adapted for transmitting said pattern of
to a control rod 166 mounted for longitudinal movement
movement and for advancing said pattern to wind said
in an axial bore in the Windlass shaft 44. The cross pin
package, including a rotary input element, a connection
164 extends outwardly through a slot 168 in the Windlass 20 from said cyclical traversing movement producing means
shaft 44 and at its outer end is normally engaged in a
for‘imparting rocking movement to said rotary input
longitudinal slot 170 in the sleeve member 59 so that the
element, a rotary output element supported parallel to
sleeve member 59 and Windlass shaft 44 are locked to turn
and adjacent said rotary input element, a rotary control
as a unit. A compression spring 175 surrounding the con
element providing a differential connection between said
trol rod 166 between shouldered portions of the control 25 rotary input and output elements for oscillating said out
rod and its supporting bore holds the rod and cross pin
put element with said input element and for each oscil
164 normally in locking position. Inward movement of
lation of said input element in one direction imparting a
the control rod causes the cross pin 164 to engage in an
stepped advancing movement to said rotary output ele
annular groove 172 in the sleeve member 59 so that the
ment with relation to said input element, connections
sleeve 59 is free to turn on the Windlass shaft 44.
including a clutching device between said rotary output
30
The operator using the hand crank 162 turns down the
element and said traversing elements, and means for
entire thread winding assembly including the Windlass
controlling said clutch to maintain a solid connection
shaft 44, the connecting straps, the ring rails, the thread
guide rails and the balloon control ring support bars
against the pressure of the compensating torsion bar 72.
When the low point is reached, a spring pressed detent
between said rotary output element and said traversing
plunger 176 mounted in a recess 178 in the face of one of
said sleeves 41 rides into a cooperating recess 184)‘ formed
in an adjacent ?xed surface of the- machine to lock said
2. In a twister frame having traversing elements
mounted for vertical reciprocatory movement for wind
thread winding assembly in the low position. By depress
ing the control rod 166 and thus forcing pin 164 out of
means, and alternatively to permit a return movement of
said traversing means relative to said rotary input ele
ment.
ing strand on a package, a builder mechanism for pro
4-0
slot 170 into the annular recess 172, it is possible to
rotate sleeve 59 relative to the locked Windlass shaft 44.
This permits further lowering of the control rings rela
tive to ring rails and thread guides to facilitate do?ing.
The continued movement of the control rings and sleeve
59 is checked by means of a stop device which comprises
a chain 186 connected at one end to a lug 183 on the sleeve
5h. The chain 186 passes downwardly through an aper
ture in the machine frame and is provided at its lower end
with a stop element 1%‘ which is adjustably secured to
the chain to be brought upwardly against the underside of
the frame by said continued movement of the sleeve 59.
After do?ing, counter rotation of the sleeve 59 results
in‘ the pin 164 snapping back into the slot 170 under the
influence of spring 175, consequently locking sleeve 59 in
relation to sleeve 41 and the Windlass shaft 44.
Said
detent plunger 176 is subsequently moved to inoperative
position when it is desired to start the new Winding op
eration by means of a manually operable release plunger
182 which is mounted in the recess 181i and is normally 60
held in a retracted position by means of a coiled compres
sion spring 184.
The operation of the means for automatically resetting
the pick mechanism is as follows:
it will be understood that during the winding down
operation, the Windlass shaft 44 is rotated in the reverse
or clockwise direction as shown in FIG. 4, thus ‘relieving
ducing traversing movements of said traversing elements,
a builder cam and follower means constructed and ar
ranged to produce a predetermined pattern of cyclical
traversing movement of said traversing elements, a pick
mechanism which comprises a rotary input element, and
a connection from said builder cam and follower means
for continuously oscillating said rotary input element, a
rotary output element, a control device connecting said
output element to oscillate with said input element and
for a stepped advancing movement with relation thereto,
a one-way clutching device including a driven element,
said device being connected between said output element
and said traversing element, means for winding down said
traversing elements, and means operable during said
winding down for automatically turning said driven ele—
ment in the reverse direction.
7 3. In a twister frame having traversing elements
mounted for vertical reciprocatory movement for winding
strand on a package, builder mechanism including means
to produce an oscillatory builder motion, a Windlass shaft
and connections therefrom supporting said traversing ele
ments for oscillatory movements with said shaft, a pick
motion connected between said oscillatory motion pro
ducing means and said Windlass shaft comprising a rotary
input element connected to be continuously oscillated by
said oscillatory builder mechanism, a rotary output ele
ment, a control device connecting said output element
to oscillate with said input element and for a stepped
advancing movement with relation thereto, input and
output clutching elements having a one-way clutching
the parts of the pick mechanism. The rewind torsion
spring 144 is thus permitted to become operative to 70 engagement interposed between said rotary output ele
ment and said Windlass shaft providing a solid connec
rotate the driven member 134 in the opposite direction
from that in which bias is normally exerted by the com
tion in response to a bias of said Windlass shaft in said
pensating torsion bar '72, The rotation of the driven
step advance direction, biasing means normally biasing
member 134 continues as the chain 140 connected with
said Windlass shaft in said step direction, and a rewind
the driven member 134 is let off during continued wind
device connected between said rotary input element and
the pressure normally exerted by the torsion rod 72 upon ,
3,072,350
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said output clutching element acting when rendered opera
offset from the free end of said torsion bar, a flexible
connector connected between said Windlass shaft and
said tension member, said tension member having a con
tive to rotate said output clutching element relative to
said rotary input element in a reverse rewind direction.
4. In a twister frame having traversing elements
tour over which said ?exible connector is laid cammed
to provide a variable lever arm length in compensa
tion for variations in torque corresponding to the twist
mounted for vertical reciprocatory movement for winding
strand on a package, and a builder mechanism for pro
ducing traversing movement of said traversing elements
including a reciprocating motion producing means, and
means for supporting and for transmitting said recipro
imposed upon said torsion bar, a pivotal support offset
length variations in accordance with the characteristics
ment during rocking movement thereof imposed by said
input element, rotary traversing element operating means,
from the axis of said torsion bar on which said tension
member is mounted, and means for adjusting the angu
catory movements to said traversing elements the com 10 lar relation of said tension member to said torsion bar.
bination of a compensating tension device connected to
8. ‘In a twister frame having traversing elements
substantiaily offset the weight of said traversing elements
mounted for vertical reciprocatory movement for wind
comprising a torsion bar of substantial length connected
ing strand on a package, builder mechanism for produc
with said means for supporting and transmitting said
ing traversing movement of said traversing elements,
reciprocatory movements to said traversing elements, an 15 comprising differential means having a rotary input ele
operating connection between said torsion bar and said
ment, a rotary output element and a rotary control ele
Windlass shaft including a lever arm attached to said
ment for advancing said output element relatively to
torsion bar having an effective length variable to offset
said input element, means for rocking said rotary input
variations in torque produced by predetermined amounts
element, means for rotating said control element to ad
of twist of said torsion bar, and means for changing said 20 vance said output element relatively to said input ele
of a particular torsion bar.
5. In a twister frame having traversing elements
mounted for vertical reciprocatory movement for Wind
ing strand on a package, builder mechanism for produc 25
a one way clutch means interposed between said rotary
output element and said rotary traversing element operat
ing means, biasing ‘means having active and inoperative
positions, said biasing means acting in the said active
position to maintain a solid connection through said
ing traversing movement of said traversing elements,
comprising a Windlass shaft extending longitudinally of
said frame, tapes connecting said Windlass shaft with said
clutch means, means to render said biasing means in‘
traversing elements, builder cam and follower connec
operative and thereby to release said clutch means and
tions with said Windlass shaft for imparting oscillatory 30 means effective upon release of said clutch means to re
and stepped rotational movements to said Windlass shaft
for building up said package, and a compensating tension
device acting on said Windlass shaft against said tapes
comprising a torsion bar of substantial length in the
order of thirty or forty feet ?xedly secured at one end
to said twister frame, a linkage connection between the
free end of said torsion bar and said Windlass shaft, and
means attaching said linkage connection to said torsion
set said builder mechanism by rotating said rotary travers
' ing element operating means through an angular dis
placement equal and opposite to the relative displacement
of said input and output elements during advance thereof.
9. Builder mechanism as claimed in claim 8 wherein
said means effective to reset said builder mechanism in
cludes spring means interposed between said rotary
traversing element operating means and said input means
bar providing a lever arm having an effective length
to be wound by advance of said output element relatively
variable to offset variations in torque produced by pre 40 to said input element.
determined amounts of twist of said torsion bar.
10. In a twister frame having traversing elements
6. In a twister frame having traversing elements
mounted for vertical reciprocatory movement for wind
mounted for vertical reciprocatory movement for wind
ing strand on a package, builder mechanism for produc
ing strand on a package, builder mechanism for pro
ducing traversing movement of said traversing elements,
comprising a Windlass shaft extending longitudinally of
said frame, tapes connecting said Windlass shaft with
said traversing elements, builder cam and follower con
nections with said Windlass shaft for imparting oscilla
tory and stepped rotational movements to said Windlass '
ing traversing movement of said traversing elements,
comprising ditferential'means having a rotary input ele
ment, a rotary output element and a rotary control ele
ment for advancing said output element relatively to said
input element, said control element being normally opera
tive to rock said output element as a unit with said input
element, means for rocking said rotary input element,
shaft for building up said package, and a compensating
means for rotating said control element to advance said
tension device acting on said Windlass shaft against said
output element relatively to said input element during
tapes comprising a torsion bar of substantial length in
rocking movement thereof imposed by said input ele_
the order of thirty or forty feet ?xedly secured at one
ment, rotary traversing element operating means, clutch
end to said twister frame, a cam shaped tension member
means interposed between said rotary output element
offset from the free end of said torsion bar, and a ?exible
and said rotary traversing element operating means,
connector connected between said Windlass shaft and said
spring means interposed between said rotary traversing
tension member, said tension member having a cam
element operating means and said input means to be
shaped contour over which said ?exible connector is
wound by advance of said output element relatively to
laid to vary the effective length of the tension member (it? said input element, tensioning means for said rotary
in compensation for variations in torque provided by
traversing element operating means effective to apply a
the twist of said torsion bar.
force thereto in opposition to and greater than the force
7. In a twister frame having traversing elements
applied thereto by said spring means, and means for
mounted for vertical reciprocatory movement for wind
ing strand on a package, builder mechanism for produc~ _ selectively reducing said force applied by said tensioning
means to a value less than that applied by said spring
ing traversing movement of said traversing elements,
means effective to reset said builder mechanism upon
comprising a Windlass shaft extending longitudinally of
release of said clutch means by permitting rotation of
said frame, tapes connecting said Windlass shaft with said
said rotary traversing element operating means by said
traversing elements, builder cam and follower connec
tions with said Windlass shaft for imparting oscillatory 70 spring means through an angular displacement equal
and stepped rotational movements to said Windlass shaft
and opposite to the relative displacement of said input
for building up said package, and a compensating ten
and output elements during advance thereof.
sion device acting on said Windlass shaft against said
11. Builder mechanism as claimed in claim 10 wherein
tapes comprising a torsion bar ?xedly secured at one
said clutch means is a single direction drive clutch
end to said twister frame, a cam shaped tension member
locked upon advance of said output element relatively to
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10
said input element and released ‘upon reduction of said
force applied by said tensioning means.
‘12. In a twister frame having traversing elements
mounted for vertical reciprocating movement for winding
strand on a package, builder mechanism for producing
traversing movement of said traversing elements, com
prising differential means having a rotary input element, a
rotary output element, and a rotary control element for
advancing said output element relatively to said input
element, means for rocking said rotary input element re
of said member, which comprises, a torsion bar of sub
stantial length in the order of thirty or forty feet having
one end thereof ?xedly secured, 'a tension member mount
mote from said differential means including a pivotally
length of said tension member inversely to variations in
mounted arm, cam means for rocking said arm and means
torque produced in said torsion bar by angular displace
ed on the free end of said torsion bar, having a cam sur
face contoured in a plane transverse to the rotational axis
of said torsion bar to provide a lever arm of variable
length, and a ?exible connector having one, end thereof
wrapped around said contoured surface and having the
other end thereof attached to said movable member, said
cam contour being chosen to vary the effective lever arm
ment thereof.
connecting said arm and said input element, means for
14. A compensating tension device adapted for main
rotating said control element to advance said output ele
ment relatively to said input element during rocking move 15 taining a tension of substantially constant value against
ment thereof imposed by said input element, rotary tra
versing element operating means having means connecting
a movable member during a limited range of movement
said traversing element operating means to the traversing
elements of said frame, single direction drive clutch means
interposed between said rotary output element and said
one end thereof ?xedly secured, a tension member mount
rotary traversing element operating means, prestressed
spring means surrounding said output element, interposed
between said rotary traversing element operating means
and said input means to be wound by advance of said out
put element relatively to said input element, tensioning
means for said rotary traversing element operating means
etfective to apply a force thereto in opposition to and
greater than the force applied thereto by said spring means
of said member, which comprises, a torsion bar having
ed on the free end of said torsion bar rotatably adjustable
on an axis disposed lengthwise of the rotational axis of
the torsion bar, said tension member having a cam surface
contoured in a plane transverse to the rotational axis of
said torsion bar to provide an effective lever arm of
variable length, a flexible connector having one end there
of wrapped around said contoured cam surface and the
other end thereof attached to said movable member, said
cam contour being chosen to vary the effective lever arm
length of said tension member inversely to the variations
in torque produced in said torsion bar by angular dis
to maintain said cam means in operative relation with
said arm and to lock said clutch means and means for 30 placement thereof, and means for adjusting the angular
position of said tension member on its axis and thereby
selectively reducing said force applied by said tensioning
means to a value less than that applied by said spring
to adjust the range of effective lever arm length produced
means effective to release said clutch and reset said builder
by said cam contour.
References Cited in the ?le of this patent
mechanism by permitting rotation of said rotary travers
ing element operating means by said spring means through 35
UNITED STATES PATENTS
7 an angular displacement equal and opposite to the relative
displacement of said input and output elements during
2,982,487
Newton _____________ ._ May 2, 1961
781,240
907,155
France ______________ .._. Feb. 18, 1935
Germany ____________ __ Mar. 22, 1954
advance thereof.
FOREIGN PATENTS
13. A compensating tension device adapted for main
taining a tension of substantially constant value against 40
a movable member during a limited range of movement
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