Патент USA US2105920код для вставки
Jan. 18, 1938. v_ |__ JOHANNESSEN 2,105,920 ‘ STRAND HANDLING APPARATUS ‘ Filed Oct. 29, 1936 22 INVL'A/I'Of? ll. LJOHANNESSEN ATM/MID’ 29105326‘ Patented Jan. 18, 1938 [UNITED STATES MEN: bFHCE ' , 2,105,920 ; ; ‘STRAND! HANDLING APPARATUS I. ‘Vaughn LuJohann'essen, OranfordpN. 3.,‘ assign- I cry to Western Electric Companmlncorporated, ' v New York, N. Y., a corporation of‘ New York '1 1 ; Application ember 29, lssaiserial No. 108,155 I 12 Claims. (01; 1174-21; *This. invention rlelatesto strand handling ape par'atus and more --particularly to'an'automatic apparatus for maintaining tension in strands on a capstan'of‘a 'strand‘working machine upon stop page of‘th‘e machine; " _ ~ ' - afsuitablegtake-up reel. andfmeans, toidistribute ' ' ' 1 " strand working machines, for ‘instance; strand twisting ‘machines, in which a plurality ‘of strands pass around a-rnultiple grooved capstan'to a point on 'the’machine' where they are intertwisted, con templates‘van apparatus wherein the strands are automatically clamped in their individual grooves by‘a pair of 'diametricallyeopposed rollers oper ated by a dashpot controlled'spring in response to a stoppage“ of the‘ machine, thus preventing 20 slackening‘ of ther'strands ‘on the capstan and maintaining the proper tension on'the strands between the capstanlandrthe point of intertwist ing,‘ The rollers are normally spaced from the strands on the capstan‘when the machine is oper 25 ating by the energization of asolenoid included in the electrical 'power" circuit fot 'the machine so that when the power circuit is closed, the solenoid rapidly withdraws the ela'mping'rollersfrom the strands, against the action of the ‘spring, (and ho'lds'them- so-until ‘the power circuit‘ is opened whereupon'the deenergization of the solenoid per mits' th'e'spring/ to :move the rollers slowly into clamping relation'wi'th the strands. - , _ ' ' Other objects and advantages of this invention will more fully vappear vfrom the following de+ tailed’description, takenfin connection with'the accompanying drawing, ‘wherein’ Y _ ' Fig. vLisa- fragmentary elevational and diets grammatic view,‘ partly in section, of, a strand handlingapparatus embodying the features'oi the 'invellliigmend Fig. 2' is afragmentary .?' ". Yplanviewthereof. i i 'H i Y ' - I ' 5 toa power source. The machinev 58 may include the worked or twisted strands on the reel and a 110). vention in one embodiment thereof as applied to 45 art and shown‘diagrammatically'at i8 and driven by ‘a pulley and belt i9 which'may be connected an'e?icientand'practical apparatus. of the char "in accordance with-the above object, the in~ 4O arms Hoof a twisting machine'- well known’ in the - An object of the present inventionis to provide acter above described.‘ 35 ' rotatable guide pulleys [6 carried‘ on revolving drive therefor (not shown). When the arms l'l' carrying the guide pulleys it are rotated, about the vertical‘axis of‘the twisting machine l8 and the capstan drur'niZ is drawing.‘ the strands“! from their'suppliesand delivering them to the 1-0 revolving pulleysri?, the strands .?rst passing through the stationary‘ guide tube vl5, it- will be evident‘ that the strands will be intertwisted be tween the "tube' and the pulleys, the twisted strands being taken up underltension on the reel (not shown); Methods of driving a take-up reel through a friction clutch or the ‘like-for applying a constant tension to thels'trand being wound are common ‘in the art ‘and it is believed unnecessary toiillustrate this mechanismi "It also is old’ to mount a take-up reel in a frame which is rotated about the axis of agroup' of strands being twisted; as illustrated in the vpatent to Bouget et1a1.',2,041, 2.5 8_1‘2; May 26, 1936.1 " ' ' "l ' F '-v ' ' " Although 'the'strandsas' they are-withdrawn from‘the supply vso'ur‘ces'are subjected to some tension'byv means 'of'a-tension regulating brake associated with eacl'r'sup'ply'sourcefthere ‘may be 3,9 some slackening of tension‘ between the supply andthe capstan when the machine" isstopped, To prevent slackening or-l'ooseninglof the‘strands H3 in their individual capstan drum grooves I4, Which-would result in, adisturbance'of the inter twirstin the strandsbetweenthe guide‘ tube I5 and the pulleys it due to a lessened tension in the ‘strands between the 'cap_stvanp_drum_ IZ’and .the point of intertwistin'g upon‘ stoppage’ of thetwist ing‘ machine'particularly since the lessened ten- ‘ sionwould often be nonrrropdrtionatej among‘ the individualfstrands, the following‘described strand Reierringto the drawing, oneje'mbodim'ent of handling ‘orterision‘ control] mechanism is pro, Integral with a base- 26' is a hollow. frame or to_'the handling of a plurality of parallelfstran'ds ‘the invention has been shown which is applicable yidedg' ‘_l llbeingjdrawn over a multiple grooved idler guide ‘sheave II' from supply sources (not shown) of_ a ‘strand working or twisting machine by a‘ multiple “grooved power driven drawing capstan drum‘ l2, standard Zion’ which is ,l'Qlll'naled a'horizontal ' ‘ " ' shaftj 22; the shaft havingv'?xed thereto Within the standard a sprocket wheel '23 which-is driven in the 'direction ‘of the arrow 'fromfa? suitable .50 ‘the strands travelling ‘in ‘individual grooves‘ l3 source ofg3'power"(not shown) "by'a chainlzllj. ‘ ‘and M'of the guidesheave and capstanfdruln H Pinnedjtofthe forward end of the shaft 'ZZ'is ‘the multiple grooved capstan jd'rum '12’ formed with and [2, respectively, inthe direction of the ar rows (Fig; l); Thestrands viil'le'aving the capstan a plurality; inthe presentemb'odimen't; four'pe 'ltfdheifqr éaehrstrand w; The ‘11mm 12' Pass. throlllgha Stationary guide-tube‘, l5 'fiphéralsrbores, idler'iguide sheave- " I l' is \likev’rise'provided ‘with 5 ‘whe‘r'e‘they are bunched a'nd thence‘betweenifreely 2 four grooves I3, one for each strand. 2,105,920 Disposed diametrically opposite to each other about the axis of the capstan drum are pivotal arms 25 ?xed to shafts 26 journaled on the standard 2I. Freely journaled on the outer end of each of the the circuit through the solenoid is also closed. The capstan, twister and take-up may be driven by a single motor with interconnecting gearing or by separate motors. In the latter case, it will be understood that electric power is applied to arms 25 is a roller 21 which is aligned with the and disconnected from grooved periphery of the capstan drum I2 and of such dimensions that when moved toward the neously. In the operation of the above described strand capstan drum its peripheral surface will engage 10 each of the strands I 0 on the capstan drum. The rollers 21 are freely journaled on the arms 2'! so that in case the rollers engage the strands I0 before the capstan drum I2 has stopped or they are not withdrawn before the capstan drum starts to rotate, the rollers will rotate freely with out deleterious effect on the strands. The roll ers 21 are faced on their peripheries with a suit able anti-slipping material, such as rubber, to ef fect a ?rm grip on the strands II] when engaged therewith and also to prevent marring the strands or their covering. Upon the end of the shaft 22 opposite to the capstan drum I2 is pivotally carried a lever 28 which is operatively connected to arms 29 ?xed 25 to the shafts 26, which also carry the arms 25, by links 30, each link at one end being pivotally connected to the lever 28 the same distance from its pivotal axis, the opposite ends of the links being pivotally connected to the outer ends of 30 the arms 25. Thus, it will be apparent that the rollers 21 will be moved in unison toward and from the strands I0 on the capstan drum I2 when the lever 28 is rocked counterclockwise and clockwise, respectively, about the shaft 22, the 35 movements of the lever 28 being transmitted to the rollers by means of the links 3!] and arms 29 and 25. The outer end of the long arm of the lever 28, as indicated at 33, is pivotally con nected to the upper end of a tube 34 projecting from a dashpot 35 which comprises a cylinder and a piston 36 therein which is connected to the lower end of the tube 34. A compression spring 31 below the piston tends to move the piston and tube upwardly to rock co1mterclock 45 wise the lever 28 and. through the links 33 and arms 29 and 25 causing the rollers 27 to be drawn simultaneously into clamping engagement with the strands ID on the capstan drum I2. For controlling the rate of speed at which the 50 rollers 21 move into engagement with the strands Ill on the capstan drum I2 when the spring 31 is permitted to act, an adjustable oil valve 49 the motors simulta handling apparatus starting with the strand working or twisting machine I8 in a non-oper ers 21 are engaged with the strands ID, as shown in the drawing, the machine is set in motion by closing the circuit to the driving motor or mo tors. Simultaneously therewith, the solenoid 43, 15 which is included in the motor circuit, is ener gized and the core 42 is rapidly drawn down wardly and the lever 28 connected thereto is rocked clockwise about the shaft 22 and through the described connections to the rollers 21, the latter are quickly withdrawn from clamping en gagement with the strands Ill on the capstan drum I2. To permit a quick displacement of oil from the lower side of the piston 36 to the upper side thereof when the core 42 and thereby the pis ton 36 is drawn rapidly downwardly, a check valve is provided in the dashpot 35 comprising a free or ?oating washer 45 surrounding the tube 34 above the piston 36 which ‘is perforated. In the downward movement of the piston 36, the oil therebelow is forced through the perforations in the piston, the washer 45 being lifted from the piston. During an upward movement of the pis ton 3B, the washer 45 serves to close the perfora tions in the piston to the passage of oil from above the piston, the valve 40 at this time con trolling the passage of oil. By means of the pivotal connection 33 between the lever 28 and the dashpot tube 34, the dashpot spring 31 is compressed during the rocking of the lever. During the operation of the machine, the strands I!) are drawn by the capstan drum I2 from their supply sources (not shown) at the left of the idler guide sheave II, over the latter and around the capstan drum and delivered to the twisting machine l8, each of the strands travel ling in its respective grooves I3 and I4 of the idler guide sheave and capstan drum I2, respec tively. As long as the machine I8 is operating, the rollers 21 are disengaged from the strands I0 and the dashpot spring 31 will be held compressed. is included in the dashpot 35 for regulating the When the machine is stopped by opening the escape of oil from the upper side of the piston 55 36 to the lower side thereof during the expan sion of the spring in a manner to be presently motor circuit, the circuit through the solenoid 43 will likewise be opened and the deenergization described. By adjusting the valve 40, which is carried in the tube 34 and screw threadedly con nected thereto at its upper end, the escape of oil 60 from the upper side of the piston 36 to the lower side thereof may be regulated and thereby the rateof speed at which the piston moves upwardly which, by means of the tube 34, lever 28, links 30, and arms 29 and 25, controls the movement 65 of the rollers 21 into clamping engagement with the strands I 0. -Also pivotally connected to the long arm of the lever 28 at a point between the adjacent link 36 and the dashpot tube 34, is the upper end of a link 4|, the lower end thereof being simi larly connected to a core 420i an electrical sole noid 43. The solenoid 43 is included in the elec trical power circuit for the machine which is driven by an electric motor and when the motor 75 circuit is closed to set the machine in motion, 10 ating condition wherein the strand gripping roll 20 25 30 35 40 v45 50' thereof releases the energy stored in the com pressed dashpot spring 31 with the result that the lever 28 is rocked counterclockwise and the rollers 21 are moved slowly into clamping engagement with the strands I 0, the speed at which the rollers 60 move being determined by the adjustment of the dashpot valve 43 in the manner previously de scribed. Preierably, the rollers 21 should ?rmly engage and grip the strands I3 in their individual capstan drum grooves I4 at substantially the 65 moment the capstan drum I2 comes to a halt, thus maintaining the proper operating tension in the strands extending around the capstan drum I2 to their points of being worked or inter twisted in spite of slackened tension in the 70 strands between the capstan drum and the strand supply sources. From the above description of the apparatus for controlling tension in strands on a capstan of a strand working or twisting machine upon stop- 75 3 2,105,920 page of the machine, it will be readily seen that the strands are automatically maintained under suitable tension in the capstan grooves at all rollers arranged about the periphery of the cap stan and movable in unison into and out of times, even though the tension on the strands a solenoid for moving said rollers in one direction, and a dashpot for moving them in the other di rection. between the capstan drum and the strand supply sources is slackened when the machine stops, with the result that no disturbance of the intertwist in the strands between the capstan drum and the point of intertwisting will occur when the 10 machine is stopped. Although the invention herein described and illustrated is particularly well adapted for use in strand twisting machines, it will be understood that the invention is capable of many other modi ?cations and applications and is to be limited only by the scope of the appended claims. What is claimed is: 1. In strand handling apparatus, a take-up means, a capstan for receiving strand material 20 and delivering it to said take-up means, and means responsive to a stoppage of the take-up means and the capstan for maintaining the ten sion on the length of strand between the capstan and take-up means. 25 2. In strand handling apparatus, a common capstan for receiving a plurality of strands, a common take-up means for taking up strands un der tension from said capstan, means for simu1~ taneously clamping said strands, and means act 30 ing automatically when the apparatus is stopped to actuate said clamping means for maintaining a predetermined tension on the strand portions entering the take-up means. 3. In a strand twisting apparatus, a take~up 35 means for twisted strands, means for twisting strands together, a capstan for receiving strands and delivering them to said twisting means, and means responsive to the stoppage of said take-up means and capstan for maintaining the tension on the lengths of strands between the capstan and take-up means. 4. In a strand handling apparatus, a capstan having a plurality of grooves for receiving sepa rate strands, means for driving said capstan to advance said strands, and movably mounted nor mally ineffective means effective when the cap stan is stopped for clamping the strands in said grooves. 5. In a strand handling apparatus, a capstan, means for supplying strand material to said cap stan, means taking up the material under tension from the capstan, and means for clamping the material when the capstan is stopped, said means comprising a clamping element, a solenoid for moving said element in one direction, a spring for moving it in the other direction, and means for retarding one of said movements. 6. In a strand twisting apparatus, a capstan, means for supplying a plurality of strands to said 60 capstan, means for intertwisting strands ad vanced by said capstan from said supply means, means for driving said capstan and twisting means, and movably mounted normally ineffec tive means effective when the capstan and twist 65 ing means are stopped for clamping the strands to said capstan to prevent slackness of the strands thereon and thereby preventing disturbance of the twists in the strands. '7. In a strand handling apparatus, a capstan 70 having a plurality of grooves for receiving sepa rate strands, means for driving said capstan to advance said strands, and means for clamping the strands in said grooves when the capstan is stopped, said means comprising interconnected clamping engagement with the strands thereon, 8. In a strand handling apparatus including means for working a strand and a capstan for moving the strand to said working means, means for rotating the capstan and driving said working 1O means including electric motive means and an operating circuit for said motive means, and means including a movably mounted element re sponsive to the opening of said circuit when stop ping said capstan and working means to cause said element to clamp the strand to the capstan for maintaining the tension on the length of strand between the capstan and working means. 9. In a strand handling apparatus including means for working a strand and a capstan for moving the strand to said working means, means for rotating the capstan and driving said working means including electric motive means and an operating circuit for said motive means, means mounted for movement relative to said capstan for clamping the strand thereto, and means for moving said latter means into clamping engage ment with the strand on said capstan in response to the opening of said circuit when stopping said ,' capstan and working means for maintaining the tension on the length of strand between the cap stan and working means. ' 10. In a strand handling apparatus including means for working a strand and a capstan for moving the strand to said working means, means for rotating the capstan and driving said work ing means including electric motive means and an operating circuit for said motive means, and means responsive to the opening and closing of said circuit when stopping and starting said 40 capstan and working means to clamp the strand to said capstan for maintaining the tension on the length of strand between the capstan and working means upon stoppage thereof and for unclamping the strand when the capstan and 45 working means are started when the circuit is closed. 11. In a strand handling apparatus, including means for working a strand and a capstan for moving the strand to said working means, means 50 for rotating the capstan and drivingsaid work ing means including electric motive means and an operating circuit for said motive means, means movable to and from the strand on said capstan for clamping and unclamping the strand to the 55 capstan, and means including an electric solenoid in said circuit responsive to the closing and open ing of the circuit when starting and stopping said capstan and working means to move the clamping means from the strand upon starting 60 the capstan and working means and moving the clamping means to clamp the strand to the cap stan when the capstan and working means are stopped for maintaining the tension on the length of strand between the capstan and working 65 means. 12. A device for clamping strand material against a capstan, comprising a movable support, a roller freely journaled on said support on an axis parallel to the axis of the capstan, and 70 means for moving the support to bring the roller into engagement with the strand material. VAUGHN L. JOHANNESSEN.