US2868468A - Strand reeling apparatus - Google Patents

Description

Jan. 13, 1959 T. T. BUNCH STRAND REELING APPARATUS 3 Sheets-Sheet 1 Filed April 28, 1955 INVENTOR 7. T. BUNCH By ATTORNEY F NEIL. ll:

Jan. 13, 1959 T. T. BUNCH STRAND REELING APPARATUS 5 Sheets-Sheet 2 Filed April 28, 1955 w UPx INVENTOR.

7. 7'. BUNCH A TTORNEV Jan. 13, 1959 T. T. BUNCH 2,868, 8;

STRAND REELING APPARATUS Filed April 28, 1955 3 Sheets-Sheet 3 INVENTOR.

T. T. BUNCH FIG 7 By 5/ United States Patent STRAND REELING APPARATUS TillmanT. Bunch, nearAshland, Md., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application April 28, 1955, Serial No. 504,498

6 Claims. (Cl. 242-45) entire length of the reel from one flange thereof to theother. In reeling operations, wherein a continuously advancingyrelativelythin and: fragile strand is reeled upon successive takeup. reels withoutinterrupting the advance of the strand, considerable difiiculty has been encountered heretoforein providing suitable strand distributing means capable of achievingthe. necessary rapid and smooth changes in. the distribution rate thereof, when the strand is transferred instantaneously from a full reel to an empty reeli.

An object of this invention is to.provide new and improved strand reeling apparatus.

Another object of this invention is to provide new and improved apparatus for. distributing" relatively thin and fragile strands uniformly upon takeup reels.

Strand reeling apparatus illustrating certain features of the invention may include a pair of reels, means for rotating each of the reels independently :of the other and means for alternately transferring a strand being reeled from one of said reels to the other. A reciprocable means distributes the strand between opposite ends of the reel upon whic h the strand is being reeled, and means are provided for actuating the distributing means at any given time: at a rate proportional to the algebraic sum of the instantaneous rotational speeds of the takeup reels at that time.

A complete understanding of the invention may be had from the following detailed description of apparatus forminga specific embodiment thereof, when read in conjunction with the appended drawings, in which:

Fig. l is a. fragmentary, topplan view of astrand reeling machine with parts thereof broken. away for clarity;

Fig. 2 is an enlarged sideelevation ofa portion of the apparatus shown in Fig. 1 with parts thereof broken away for clarity;

Fig. 3 is an enlarged, fragmentary portion of the apparatus shown in Fig. 2 with parts thereof broken away for clarity;

Fig. 4 is a fragmentary, horizontal section taken along line 44 of Fig. 3; i

Fig. 5 is an enlarged, fragmentary portion of the apparatus shown in Fig. 1;

Fig, 6 is an enlarged, fragmentary, vertical section taken along line 6-6 of. Fig. 1;

Fig.7 is an enlarged, fragmentary, vertical section taken along line 7--7 of Fig. 2, and

Fig. 8 is a schematic representation of ahydraulic circuit forming part of the strand reeling machine.

Referring now to the drawings, there is shown in Figs. 1 and 2 a strand takeup machine for reeling up a relatively thin and fragile strand. 10, which is advanced continuously at a constant linear speed from an insulating machinetnot shown), without interrupting or slackening the travel of the strand. The strand takeup machine includes a base 11 designed to be mounted fixedly upon a floor or other foundation. Formed integrally with the base 11 is a hollow, upright column 12 on which is mounted, with freedom to rotate thereoma bilaterally symmetricalg-reel carrying frame, indicated generally by the numeral IS, comprising a base portion 16, atop casing 17, and an in termediate central pillar 18, by'whichlatter the lowerbase portion 16 and top casing 17 are spaced apart and held together.

Spaced 180 apart at each side of theframe 15" are stat tionary, upright. members 20 and 21 which support the op posite ends of a horizontal crossmember 22'. Supported fixedly by the crossmember 22 is a depending, generally cylindrical, journal housing 24. Journalled withinthelower end of the journalhousing 24 on a suitable bearing 25 is a central, cylindricalcollar 27 projectingtupwardly from. the top casing 17 of the frame 15:

The entire frame 15is rotatable on thecolumn 121and is provided on the opposite ends of the topcasing 17 with. two identical, cupped, latch receptacles 1 28-482 The latch receptacles. 28?-28 cooperate with complementary, slidable latch members 2929 mounted on brackets 30-- 39 positioned 180 apart. is. securedfixedly to the upright. member 21 and the other bracket is secured fixedlyto a vertical supportSIl The latch members 2929 are designed. to be releasablyen gaged in latch receptacles 2828 to support the frame 15. and hold it in either of two operating positionslocated 180 apart.

The frame 15 and its associated parts are designed to support and drive a pairof takeup reels 35 and 36. A pair: of freely rotatable, bearing centers 38 and39 are mounted in the base portion 16 of the frame 15 to enter central, axialsockets (not shown) formed in lower reel heads 40 and 41: 0fthe takeup reels 35 and 36 to support the reelsu The bearing centersSS and 39 areretractible downwardly" by a suitable mechanism (not shown) actuatedby levers 4'2; and 43 tobe disengaged individually-from the takeup: reels 35and 36. The base portion 16 of thezframe 15 is further provided with fixed, circular, .bottom reel guards.

drive shafts 51 and 52,. and are. designed toirotatewith The drive shafts 51 and 521v their respective drive shafts. are suitably supported for rotation in anti-frictionibearings 54 and 55 and are provided with pulleys 57and 58, re-' spectively, keyed thereto .in coaxial relation.

The pulley 57 is connected by a belt 59 to a drivepulley 60, which is keyed upon a vertical, central drive shaft 62 (Fig. 2) rotatably journaled at its opposite ends in suitable anti-friction bearings carried by the journal hous ing 24 and thecolumn 12. Near its upper end, the central driveshaft' 62 has keyed thereto a pulley 64 which is driven by a corresponding belt 65 (Figs. 1 and 2) from.

from a pulley 74 keyed to a vertical, coaxial drive shaft.

75 freely rotatable upon the central drive shaft 62. between pulleys 60 and 64. The drive shaft75 is driven by a pulley 77 integral therewith, and the pulley 77,. in

turn, is driven by a corresponding belt78'from a pulley. 79. The pulley 79 is driven by a constantnhorsepowenm electric motor drive unit .80 (Fig. 1),,similarto the drive. unit 70, .having a controlled maximum speed. The-pulley. 79 is operatively connected. to the. drive unit 80ythrough a conventional gear reduction unit t 81.

One of the. brackets 30--30 Rotary, constant displacement, hydraulic pumps 84 and 85 (Fig. 1) are operatively connected to the drive units and 80, respectively, through their associated gear reduction units 71 and 81, respectively. As shown in Fig. 8, the pumps 84 and 85 are connected in parallel to hydraulic conduits 87 and 88, which, in turn, are connected through a spool type, four way, reversing valve 90 to a rotary, constant displacement, hydraulic distributor motor 92. Whenever either one or both of the hydraulic pumps 84 and 85 are operated, hydraulic fluid from a reservoir 93, which communicates with the conduit 87, is circulated under pressure through the conduits 87 and 88 in the direction indicated by the arrows in Fig. 8. Check valves 9494 prevent the reverse flow of hydraulic fluid through the hydraulic pumps 84 and 85. By virtue of this arrangement, the hydraulic pump 84 and 85 drive the distributor motor 92 at a speed proportional to the algebraic sum of the speeds of the drive units 70 and 80 and in a direction dependent upon the position of a slidable control spool 95 forming part of the reversing valve 90.

The distributor motor 92 (Fig. 2) is mounted to a base plate 97, and is provided with an output shaft 99 connected operatively to drive a distributor carriage 100 slidably mounted on spaced, vertical, parallel guide rods 102-102. The guide rods 102-102 (Fig. 7), are attached fixedly at their upper ends to the bracket 30 secured to the support 31 and at their lower ends to the baseplate 97.

Formed integrally with the distributor carriage 100 is a laterally projecting plate 104, which is attached fixedly to a vertical leg of an endless, flexible, non-slip, transmission belt 105 provided on its drive surface with molded teeth 106106 of Neoprene compound. A suitable belt of this type is the Gilrner Timing belt manufactured by New York Belting and Packing Company, Passaic, New Jersey. The belt 105 is arranged in a vertically extending loop around a toothed drive pulley 107 keyed on the shaft 99 of the distributor motor 92 and a toothed idler pulley 108. The idler pulley 108 is keyed on one end of a horizontally extending operating shaft 109 of a valve reversing mechanism which is indicated generally by the numeral 110.

The shaft 109 is mounted rotatably on suitable antifriction bearings 112 and 113 mounted, respectively, on the support 31 and a bracket 114 projecting vertically from the outer end' of a laterally projecting bracket plate 115 which is attached to the outer side of the support 31. The valve reversing mechanism 110 (Fig. 6) also includes a generally triangular shaped mounting plate 117 fixedly secured near one of its apexes to the shaft 109 for oscillatory movement therewith in a plane perpendicular to the axis of that shaft. Mounted pivotally on pivot pins 118 and 119 near the other two apexes of the mounting plate 117 are a pair of depending hammer arms 121 and 122, respectively.

Attached to the ends of the hammer arms 121 and'122 adjacent to the pivot pins 118 and 119 (Fig. 6) are projecting, eccentric lugs 123 and 124, respectively, which are connected resiliently to an anchor post 126 by associated tension springs 127 and 128. The anchor post 126 is fixed to the mounting plate 117 in alignment with and midway between the pivot pins 118 and 119. The tension springs 127 and 128 normally urge the hammer arms 121 and 122 into the positions in which they are shown in Fig. 6, so that the line of action of each of the tension springs intersects the center of rotation of its associated hammer arm.

Mounted fixedly on the outer side of each of the hammer arms 121 and 122, near the free end thereof, is a shock-absorbing cushion member 130 made of Neoprene compound, or the like. on the hammer arms 121 and 122 are designated to strike alternately the opposite ends of the slidable control spool 95 of the reversing valve 90, which is mounted fixedly The cushion members 130130 .ing plate 117 so that the hammer arms 121 and 122 will strike the ends of the slidable control spool 95 with sharp blows.

When the hammer arms 121 and 122 alternately strike the slidable spool 95 of the reversing valve 90, they shift the spool axially in one direction or the other to cause the reversal of the distributor motor 92. The hammer arm 121 is designed to strike the right hand end of the spool 95, as viewed in Fig. 6, when the distributor carriage 100 reaches the upper limit, of its traverse, and the hammer arm 122 is designed similarly to strike the left hand end of the spool when the distributor carriage reaches the lower limit of its traverse.

Projecting outwardly and laterally from the distributor carriage 100, as viewed in Figs. 2 and 7, are a pair of elongated, spaced, parallel fingers and 136, between which the strand 10 advances on its way to the takeup reels 35 or 36. As the strand 10 is reeled upon the takeup reels 35 or 36, the distributor carriage 100 is reciprocated up and down and the fingers 135 and 136 guide the strand to insure a uniform distribution of the strand convolutions on the reels.

Each of the drive shafts 51 and 52 is provided at its lower end with an integral collar 140 (Fig. 3) to which is rigidly attached a plurality of radially, horizontally extending snagger arms 144144. These snagger arms 144144 are made of stifily elastic material and are curved slightly downwardly. Each of the snagger arms 144--144 is formed at its outer extremity with a head 145 (Fig. 4), flattened horizontally and formed with a wedge-shaped notch 146. p

The snagger arms 144-144 are partly enclosed by reel guards and 151 attached fixedly to the under surface of the top casing 17 at each end thereof. These reel guards 150 and 151 are rigid, slightly cupped discs, positioned over the takeup reels 35 and 36, respectively, coaXia-lly therewith, and are slightly larger in diameter than the reels. Each reel guard 150 and 151 is formed with a slot 152 (Figs. 1 and 5) extending inwardlyfrom the periphery of the guard at an acute angle to the radial direction of the guard at the mouth of the slot. Up-- wardly projecting strand guide pins 154 and 155 are mounted rigidly on the top of each of the reel guards 150 and 151 (Fig. 5), one on each side of each of the slots 152-152.

Snagger arms and reel guards similar in construction to those hereinabove described, are disclosed and claimed in Brillhart et al. Patent 1,988,437.

Positioned on the upright member 21 is an electrical control panel on which three pushbutton switches 161, 162 and 163 are mounted within easy reach ofan operator. The pushbutton switch 161 is connected to a suitable circuit (not shown) including conventional relays and the like for controlling the energization of the drive units 70 and 80. The switch 161 is designed to deenergize and stop both of the drive units 76 and 80 when depressed. The pushbutton switch 162 is also a part of the above-mentioned circuit and is designed when depressed momentarily to energize the drive unit 70 and stop the drive unit 80 after a predetermined. time delay. If the drive unit 80 is operating and the pushbutton switch 162 is depressed momentarily, the drive unit .70 is started immediately to bring the peripheral drum speed of the takeup reel 35 to within of the linear speed of the continuously advancing strand 10. After a pre' determined time interval (e. g. 15 seconds) the drive unit 80 is automatically deenergized. and the takeup reel 36 stops, and thereafter the drive unit 70 drives the reel 35to reel up the strand under substantially constant tension. Contrawise, the pushbutton switch 163 is designed, when depressed momentarily, to startthe drive unit 89 immediately and stop the drive unit 70. after the predetermined time interval. it will be understood. that this predetermined. time interval may be preselected within limits.

Operation To facilitate the description of the operation of the takeup machine, let it be assumed that the motordrive unit 80 is presently energized and is driving the takeup reel 36 toreel the strand 1% thereupon, as the latter advances continuously from left to right, as viewed in Fig. 1, at a constantpredetermined speed. The motor drive unit- 80 maintains a constant horsepower output so that the rotational speed of the takeup reel 36 decreases in direct proportion to the increase in the winding radius of that reel, thereby" maintaining a constant predetermined tension on the advancing strand 10. Through out the reeling of the strand 10 upon the takeup reel 36, the hydraulic pump 85 is driven-by the motor drive unit 80 at a speed directly proportional to therotationalspeed of the reel 36, and operates the hydraulic distributor motor 92.

Since it will be assumed that the motor drive unit '70 is inoperativeand the takeup reel 35 is stationary, the

rate of operationof the distributor motor 92 is determined solely by the speedof the hydraulic pump 85. Hence, the speed of the shaft 99 of the distributor motor 92 is directly proportional to the speed of the hydraulic pump 85; and, therefore, is directly proportional to the rotational speed ofthe takeup reel 36. The distributor motor 92 rotates the drive pulley 107 to drive the belt 105 around the idler pulley 108 at aspeed proportional to the rotational speed of the takeup reel 36. As the idler pulley 1081s so driven, it rotates the mounting plate 117 either clockwise or counterclockwise, as viewed in Fig. 6, dependiugupon the direction of movement of the belt 105. i

Let it be assumed that the distributor carriage 100 is instantaneously at the upper limit of its traverse, as shown in Fig. 2. Themounting plate 117 of the valve reversing mechanism 110 then will be so positioned, as shown in Fig. 6, that the cushion member 136 of the hammer arm 121 will have just struck the right hand and of the control spool 95 to operate the valve 99" so as to reverse the distributor motor 92.

Immediately upon reversal of the distributor motor 92, the belt 105 is driven in a clockwise direction, as viewed in Fig. 7, to move the distributor carriage lltttl downwardly. Simultaneously the idler pulley 103 is driven by the belt 105 to"rotate the operating shaft1b9 of the valve reversing mechanism 110 in a counterclockwise direction as viewed in Fig. 6. The downward movement of thedistributor carriagelflt) and the counterclockwise rotation of the mounting plate Illi (Fig. 6) continues untilthe controlspool 95 of the reversingvalve 9b is operated again. by the hammer arm 122.

As the distributor carriage 100 nears the limit of its downward. traverse the free end. of the hammer arm 3122. is engaged by the detent 133 which momentarily holds the hammer arm. Finally, when the distributor carriage ran reaches the limit of its downward traverse, the ham mer 122 rides over the detent 133 and the energy which has been stored in its associated tension spring 123 is released suddenly to drive the cushion member 139 against theleft hand end of the control spool 95 with suificient force to shift it fully to the. right, so as to operate the reversing valve90 to reverse the distributor motor 92. The distributor carriage 100 immediately reverses its direction and moves upward again until the reversing valve 90 is again operated at the limit of itsupward traverse.

Thus, the strandlO is distributed to and. fro across the takeup reel 36. from the inside of the lower reel head ill to inside ofthe upper reel head. 49 ata rate directly proportionalto the rotational speed of that reel so as to achieve a uniform distribution of the convolutions of the strand upon the reel. ,Manifest1y, the lead of the latter convolutions remains constant at a predetermined value throughoutthereeling, operation as long as the rate of distribution remains directly proportional to the rotationalispeed of the takeup reel 36-.

When the takeup reel 36-is almost full and an operator desires to change thereeling of the strand .10 to the. now empty and stationary takeup reel 35, the latch members 2929 are disengaged from the latch. receptacles 28-28 and the entire frame 15 is rotated 180" counterclockwise, as viewed. in Fig. 1, until. the latch members are again engaged. Thus, the positions of the reels 35 and 36 are. interchanged without interrupting the reeling. of the strand'lt). upon the takeup reel 36. Subsequently, the operator depresses the pushbutton switch 162 whereupon the drive: unit 70 is energized and immediately brings the peripheral drum. speed of the empty reel 35"up to substantially the same speed as that of the advancing strand 10. After depressing the push button switch 162, the operator has a predetermined time intervalite. g. 15. seconds) to. performa cutover opera. tion in which the strand 10:is. severed andthe new leading end thereof j is attached to the new empty takeup reel .35. i

To achieve the cutover,..the,oper.ator lifts the strand 10 manually from its path of travel,.and without interruptirig or aflecting appreciably. its motion, slips it through the slot 152 onthe. takeup reel 35 between the upwardly projecting guide pins .154and 155. The next snagger arm 14.4- wh-ich passes the slot 142. catches the strand It) in the notch 146 formed in its head. 145, and severs the strand atonce against asharp lower edge 17!) formed on the trailing, edge of the slot. Simultaneously the snagger arm 1.4.4. jamsuthe. new leading. end of the strand 19 beneath the underface. of. the snagger arm head 145 and the upper face: of..the upper reel head 48 of the takeup reel. Thus, the strand 10 is practically instantaneously.caught, cut and attached to the. then empty reel 35 to be subsequently reeled thereupon without interrupting or. afiecting. appreciably its: motion and tension. Immediatelythereafter, at the end of the short pre= determined time interval, the drive unit is deenergized and the takeup reel 36 containing a finished strand package stops rotating.

During the short timeinterval inuwhich the drive unit 70 is energized. and. brings the peripheral drum speed of the takeup reel 35 up to match. thelinear speed of the strand, the hydraulic pump 84 is likewise started and brought up to speed. Manifestly, the hydraulicpurnp 84 will have an additive afiectupon-thespeed of the distributor motor 92 and cause it to speed up. Accordingly, the rate of distributionof the. strand 10 upon the full takeup reel 36 will increase and, for the short time that:the takeup reeln36 continuesto operate, the lead of the convolutions in the lasttlayer thereon will be greater than the. normal, predetermined lead. However, the latter effect is benefi cial because the last applied convolutions will overlayitheadjacent layer of convolutions at a greater angle and. tend to restrainuncoiling when the strand It} is severed andthe takeupreel 36 isstopped.

The. additive effect of the simultaneously operating hydraulic pumps Stand. also aids in bringing the speed of the. distributor carriage rapidly up to that to quired to form strand convolutions on the empty reel 35 having a lead atleastequal. tothe predetermined lead. At the time the cutover is performed to transfer the strand 10 from, the .full reel. 36 tothei empty reel 35, the speed of the distributor. carriage100. will. be

ferred to the takeup reel 35, the number of convolutions formed having a lead greater than the predetermined lead is relatively negligible and confined substantially to the initial layer of convolutions. Manifestly, as soon as the drive unit 80 stops, the distribution rate is determined only by the pump 86 and thereafter the lead of convo-' lutions formed is equal to the normal predetermined lead.

It will be understood that it is the novel arrangement whereby thehydraulic pumps are connected in parallel,

which facilitates a rapid transition from the slow distribution rate required for uniform distribution of the strand 10 uponthe full reel 36 to the faster distribution rate required for the uniform distribution of the strand upon the empty takeup reel 35. At the time the reeling of the strand upon the takeup reel 35 commences, this faster distribution rate causes the convolutions at the start to have a lead at least equal to the predetermined lead. If the latter condition is not obtained, the strand convolutions, instead of laying side by side in a particular layer, would tend to pile up, one on top of the other, and the result would be a soft or rough strand package instead of a firmpackage which is desired. It may be readily seen that in the above-described apparatus the control of the distribution of the strand during the cutover operation is inherent, as contrasted to conventional apparatus which require the shifting of clutches, gears or the like during the transfer from one takeup reel to another.

Manifestly, the above-described embodiment of the invention is given merely by way of example, and numerous arrangements and modifications thereof may be made within the spirit and scope of the invention. It will be understood that although the apparatus hereinabove described is designed for reeling strand-like materials, such as wire, this invention is not limited to such practice, since other materials, such as paper in take form, textile strands, and the like, may be taken up on the reels.

What is claimed is:

1. Strand reeling apparatus which comprises a pair of reels, means for rotating each of said reels independently of the other, means for alternately transferring a strand being reeled from one of said reels to the other, reciprocable means for distributing the strand between opposite ends of the reel upon which the strand is being reeled, and means connected operatively to the independent rotating means of both reels simultaneously and powered thereby for actuating the distributing means at any given time at a rate proportional to the algebraic sum of the instantaneous rotational speeds of the takeup reels at that time.

2. Strand reeling apparatus which comprises a pair of takeup reels, means for rotating each of said reels independently of the other, means for alternately transferring a strand being reeled from one of said reels to the other, a strand distributor mounted reciprocably for distributing the strand between opposite ends of the reel upon which the strand is being reeled, and hydraulic means for actuating the strand distributor reciprocably at any given time at a rate proportional to the algebraic sum of the instantaneous rotational speeds of the takeup reels at that time.

3. Strand reeling apparatus which comprises a pair of takeup reels, means for rotating each of said reels independently of the other, means for alternately transferring a strand being reeled from one of said reels t0 the other, reciprocable means for distributing the strand between opposite ends of the reel upon which the strand is being reeled, a reversible hydraulic motor for actuating the distributing means reciprocably, and a pair of hydraulic pumps operatively connected to the respective takeup reels for operating the hydraulic motor at any given time at a speed proportional to the algebraic sum of the instantaneous rotational speeds of the takeup reels at that time.

4. Strand reeling apparatus which comprises a pair of takeup reels, separate drive means for rotating each of said reels independently of the other, means for alternately transferring a strand being reeled from one of said reels to the other, a strand distributor mounted reciprocably for distributing the strand to and fro between opposite ends of the reel upon which the strand is being reeled,

hydraulic pumps for operating the motor, said pumps being driven respectively by the separate drive means for the respective takeup reels at speeds directly proportional to the rotational speeds of their respective takeup reels, and means connecting the hydraulic pumps in parallel hydraulically whereby the hydraulic motor at any time is operated at a speed proportional to the algebraic sum of the instantaneous rotational speeds of the takeup reels at that time.

5. Strand reeling apparatus which comprises a pair of takeup reels, separate drive means for rotating each of said takeup reels independently of the other, means for alternately transferring a strand being reeled from one of said takeup reels to the other, a distributor carriage slidably mounted for movement parallel to the longitudinal axes of said takeup reels, an endless belt to which the distributor carriage is attached fixedly, a reversible hydraulic motor for driving the endless belt reciprocably to cause the distributor carriage to distribute the strand to and fro between opposite ends of the reel upon which the strand is being wound, and. a pair of hydraulic pumps operatively connected to the respective takeup reels for operating the hydraulic motor at any time at a speed proportional to the algebraic sum of the instantaneous rotational speeds of the takeup reels at that time.

6. Strand reeling apparatus which comprises a pair of takeup reels, separate drive means for rotating each of said takeup reels independently of the other, means for alternately transferring a strand being reeled from one of said takeup reels to the other, a distributor carriage slidably mounted for movement parallel to the longitudinal axes of said takeup reels, an endless belt to which the distributor carriage is attached fixedly, a reversible hydraulic motor for driving the endless belt reciprocably to cause the distributor carriage to distribute the strand to and fro between opposite ends of the reel upon which the strand is being wound, a pair of hydraulic pumps for supplying hydraulic fluid to operate the motor, said pumps being driven respectively by the separate drive means for the respective takeup reels at speeds directly proportional to the rotational speeds of said takeup reels, and means connecting the hydraulic pumps in parallel hydraulically whereby the hydraulic motor is operated at any time at a speed proportional to the algebraic sum of the instantaneous rotational speeds of the takeup reels at that time.

References Cited in the file of this patent UNITED STATES PATENTS 1,300 Spencer Sept. 6, 1927 1,988,437 Brillhart et al. Jan. 22, 1935 1,646 Blodgett June 15, 1943 0, 36 Stone et al. Feb. 1, 1944 2, 24,021 Cook July 15, 1947 6,6 6, Hansen et al. Mar. 27, 1951 a reversible hydraulic motor for actuating the strand distributor reciprocably, a pair of

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