Патент USA US2129639код для вставки
Sept. 13, 1938. 5'. J. ADAMS, El‘ ALSTOP mow'rxou FOR ROVING FRAMES 2,129,639 ' Filed Sepf. 11, 1937 4.90“ q T6 7y Patented Sept. ‘13, 1938 . $129539 UNITED STATES PATENT OFFICE‘ 2,129,639 > STOP MOTION FOR,’ ROVING, FRAMES Simpson James Adams and’ William Archie Smith, Spindale, N. G. I Application September 11, 1937, Serial No. 163,494 ' 11 Claims. Our invention relates to textile machinery and in particular to'arrangements for automatically stopping. the machine when a strand of textile material being operated “on by the machine 5 breaks or acquires‘an excessive amount of slack. While our. invention is'p'articularly adapted for ‘use on a roving machine,_it may be applied to other forms of textile machines. I 5,5. Known ‘forms of stop. devices employing drop it ‘wireslcannot-be used on the sliver delivered from the front roll of ‘a roving frame due to the fact that the sliver. is very delicate because of the lack ,ofT‘twistQin the sliver. ' The twist in the sliver atzth‘is. point is kept as low as possible so the la ‘?b‘recan be readily drafted down in the next ‘ (Cl. 118-_—4) As shown in Figure 1, the draft rolls lv and'Z comprise a series of longitudinal sections engag ing each other, and a strand or sliver ofv the roving machine is fed to the back pair of rolls of each section by means of a guiding trumpet 5 5. The roving sliver is passed successively be tween the second and third pair of draft rolls and extends to rotating ?yers arranged in front of the roving machine. In Figure2, the sliver or strand 6a extends to the ?yer "la in the back 10 row of ?yers, while the sliver 622 extends to a flyer ‘lb located in the front row of ?yers. Alter nate slivers, therefore, are associated with the v?yers in alternate rows. The two ,?yers la and "lb wind the roving slivers on bobbins 1c and 1d 15 'fp'lodess to‘ follow,‘ and for this reason, the con respectively. The guiding trumpets 5 associated 'ventional type of drop wire cannot be used at this with the various sections of draft rolls are mount point because it imposes too much weight on the ed upon a frame or bar 8 which is mounted for sliver and will cause it to stretch and ultimately reciprocating movement parallel with the axis break. 7 _ Y Y of the draft rolls l—2. ' An object of the invention is, to vdevise an au tomatic stop device for a textile machine which Twill‘ not injurei'or breakdelicate strands of tex tilev materialQ. The drop wire employed in the ; ,_stop"m6tionin the present invention is designed to ha've‘its entire weight supported independently of the'sliver. ’ p ' 1 ' ' 'f‘ A further object of the invention'isto devise an automatic stop for detecting an excessive I30 ‘amountof 'sl'a'ck'or'break in alstrand of textile material where the strand is subjected not only to longitudinal‘ movement but to a traversing movement'as' well." ' ‘ ‘A. preferred embodiment of our invention is ~_;5 shown in the accompanying drawing as applied to a roving machine, and in the drawing, Figure I is‘ ‘a diagrammatic view showing a fragment of a'r‘oving machine in front elevation; ' ‘Figure 2‘ is‘ a sectional view of Figure 1 taken a“), along'l‘ine 2-~2 and showing two ?yers and as sociated bobbins; ‘ Figure 3 is a sectional view taken along'li'ne 3-3 ‘of Figure 1; " Figure ,4 isa vvi'e‘w‘illustrating a modi?ed form 45 ‘of cjl’etectorereed; ‘ ' ' ‘Figure 5 is a sectional view along line 5—5 of “Fi‘gurefé', and . Figure dis a side view of a modi?ed detector reed.‘ 15,9 -~' Referring to the drawing, power driven draft ‘rolls of theroving-machine are indicated at l, ‘and the cooperating‘ top’ rolls, which are'usually covered with cork or leather, are shown at 2. The ‘draft rolls are journaled upon suitable 25;, brackets 3 mounted upon the machine framed. Suitable means are 20 known for reciprocating the frame 8 and such means is represented in Figure 1 of the drawing as cam 9 mounted upon a rotating shaft 9a, and cooperating with a follower 91) carried by a bracket 90 secured to ‘the frame 8. Suitable 25 biasing means represented by the spring I0 is provided to maintain the follower in contact with the cam. It is understood that the purpose in providing the ‘oscillating ‘movement of the guid- , ing trumpets 5 is to impart a traversing motion 30 to the roving slivers so that the sliver will not remain in one path in passing through the draft rolls but will be shifted’ to different parts of the draft. roll and thus prevent uneven wear. The arrangement described above is included 35 in the ordinary construction of a roving machine. The stop arrangement constituting our invention involves a frame It formed of insulating mate rial mounted upon frame 4 between the draft rolls and the ?yers. The frame H is mounted '40 for reciprocating motion parallel with the axis ‘of the draft rolls, and this reciprocating motion may be imparted to the frame I I from the frame 8 by a connection between these frames as indi cated by the bracket [2. If desired, a separate “4'5 cam or other driving means may be provided for reciprocating the frame II in synchronism with frame 8. It is not essential that the frame I I be reciprocated the same distance as frame 8 but the two frames should be reciprocated in syn- t‘50 chronism. The insulating frame ll carries a number of reeds or drop wires l3, there being one reed associated with each section of the draft rolls _ and arranged in alignment with‘ the correspond- Q55 2 2,129,639 ing guiding trumpet 5. As shown in Figure 3, the reeds l3 are pivotally supported in a slot Ila formed in the frame II by means of pins I311. The pivotal points of the reeds are ar ranged below the center-of gravity of the reed, and in its normal operation the reed occupies a vertical position and is maintained in this posi Ill tion by the roving sliver. It will be understood that when the reed is in normal or running posi part of the reed, two pins 140 and Md may be tion, it occupies a position of unstable equili brium, and the slightest force will cause the mounted in the insulating frame II to cooper 10 ate with the twisted section I3c of the reed, the reed to tilt either to the right or to the left of its pivot point. As shown in Figure. 1, the reed is formed with an elongated aperture [3b formed in the upper end through which the roving sliver two pins being joined together by conductor M. passes. These reeds are preferably formed of a very light material, such as aluminum; and may be stamped from strip ‘or sheet stock, although they may also be formed of aluminum wire as described below. On the front side of the in sulating frame H is arranged a conducting strip l4 formed of any suitable metal, such as copper, and a pair of transverse extensions Ma and 14b are provided on the strip and arranged on op posite sides of each reed I3, the extensions 14a and Mb being arranged to serve as stops to limit the tilting of the reed to either side of its nor mal position. All of the pivot pins 13a are joined together by conductor l5 which is insulated from the conductor M. Any suitable power throw-01f device may be employed, and in Figure 1 of the drawing we have represented this arrangement as consisting into the reed without the necessity of threading the sliver through a slot or aperture in the reed. As shown in Figure 1, the reeds associated with the back row of ?yers may be shorter than the 20 reeds associated with the front row of ?yers, but both sets of reeds may be made of the same length, if desired. Various modi?cations of our invention will be obvious to those skilled in the art, and any such 25 modi?cations that fall within the terms of the appended claims are considered as falling within the scope of our invention. What we claim is: 1. In a stop device for a textile machine, a reed . for embracing opposite sides of a textile strand, said reed being pivotally supported below its I1 which is shifted by a pivoted lever 18 against the action of the biasing spring IS, the fork being maintained in normal operating position of said strand to prevent substantial tilting in ‘by means of a latch 2B engaging an abutment on the bar 11 as shown. The conductors l4 and 15 are connected in an electric circuit which includes a suitable source of current represented by the battery 21, a magnet 22 for lifting the latch 20, ‘and asuitable switch 23 which is operated to open-circuit position when the bar 11 moves to unlatched position. During the normal operation of the roving ma chine, the power throw-off device is set as in Fig. 1, and the reed supporting frame II is re ciprocated or traversed in synchronism with the either direction so long as said strand runs at normal tension, and means controlled by said reed when it tilts a predetermined amount in 40 either direction for interrupting the power ap plied to said machine. > 2. In a stop device for a textile machine, a reed for embracing opposite sides of a textile strand, said reed being pivotally supported below 45 its center of gravity and arranged for tilting movement transversely of said strand to either side of its, position of unstable equilibrium, said reed having parts for engagement with opposite sides of said strand to prevent substantial tilting traversing bar 8 carrying the guiding trumpets 5, the reeds I3 being maintained in vertical position by the slivers, which position corresponds to the in either direction so long as said strand runs ‘at normal tension, and a pair of electrical con position of unstable equilibrium. So long as a sliver does not break or acquire substantial slack, tacts arranged on opposite sides of said reed and positioned to be engaged by said reed when it tilts the reeds I3 are maintained in substantially ver 55 tical position and no appreciable force is exerted on the slivers by the reeds, since the weight of the reed is carried by the pivot pins, and there is substantially no transverse force exerted on the sliver. In case a sliver should break or should acquire an excessive amount of slack, the asso ciated reed will fall to one side or the other of its normal position and will engage one of the extensions Ma and Mb of conductor l4, thereby closing the circuit to energize magnet 22 and to 65 release latch 20, thus permitting the belt-shift ing fork IE to be moved into a position to shift the power belt to the loose pulley and thereby stop the machine. As soon as the lever l'l shifts to the left, the switch 23 opens and avoids waste 70 of current while the machine is stopped. After 1,7,5 In Figure 6 we have illustrated a modi?ed form of reed or drop-wire in which the reed is open at the upper end and the two ends or tines are flared 15 outwardly to facilitate the insertion of the sliver center of gravity and arranged for tilting move ment transversely of said strand to either side of its position of unstable equilibrium, said reed . having parts for engagement with opposite sides ' of a belt~shifting fork l5 mounted upon a bar Li form of drop wire or reed formed from suitable wire of light-weight material such as aluminum wire. As will be seen this form of reed consists of a loop of wire having both ends wound around the pivot pin l3a one or more turns and then twisted together at the lower end as indicated at I30. Instead of employing the electrical con tacts Ma and Mb cooperating with the upper the abnormal conditions have been corrected by the attendant, the operated reed will again main tain its vertical position and the machine may be started by operating the lever l8 to the right. In Figures 4 and 5 we have shown a modi?ed a predetermined amount from its position of un stable equilibrium. 55 3. A stop device according to claim 1 in which the power interrupting means includes an elec tric circuit and a pair of contacts arranged on opposite sides of the reed and cooperating with 60 the reed for completing said circuit when the reed tilts a predetermined amount from its unstable position. 4. In a stop device for a textile machine, a reed for embracing opposite sides of a textile strand, 65 said reed being pivotally supported below its center of gravity and arranged for tilting move ment transversely of said strand, said reed having parts for engagement with opposite sides of said strand and for normally maintaining said reed in 70 its position of unstable equilibrium by said strand, and means controlled by said reed when it tilts a predetermined amount from its position of un stable equilibrium for interrupting the power ap plied to said machine. - 3 2,129,689 5. In a stop device for a textile machine, a drop reed having a perforation for receiving a textile strand, means for pivotally supporting said reed below its center of gravity on an axis to con strain said reed to movement transversely of said strand and on either side of the vertical position, the sides of said perforation being arranged to engage opposite sides of said strand and prevent substantial tilting in either direction so long as 10 said strand runs at normal tension, and means controlled by said reed when it inclines to either side of the vertical position by a predetermined amount to interrupt the power applied to said machine. 6. In a textile machine, means for feeding a textile strand through said machine, means for simultaneous traversing motion to said guiding means and to said reed. ( 9. In a textile machine, a pair of draft rolls for feeding a textile strand, guiding means for said strand arranged on one side of said rolls, a stop device for said machine including a drop-reed ar ranged on the opposite side of said rolls and em bracing said strand, and means for imparting si multaneous traversing motion to said guiding means and to said drop-reed. 10. In a textile machine, draft rolls for draw 10 ing a textile strand through said machine, guid ing means for said strand arranged on one side of said rolls, a reed for embracing said strand on the opposite side of said rolls, means for piv 15 otally supporting said reed below its center of periodically traversing said strand transversely gravity and in a position for tilting movement of its direction of travel, a reed embracing said transversely of said strand to either side of its strand, means for traversing said reed synchro position of unstable equilibrium, means for im nously with said ‘strand, and means controlled parting simultaneous traversing motion to said 20 by said reed upon the breaking of said strand guiding means and to said reed supporting means, or upon excess slack therein for interrupting a pair of electric contacts arranged on opposite power applied to said machine. sides of said reed and positioned to be engaged by below its center of gravity and in a position for said reed when it tilts a predetermined amount from its position of unstable equilibrium, a power 25 throw-off device for said machine, an electric circuit for controlling said power throw-off de— vice, said circuit including said reed and said con tacts whereby said circuit is energized by the tilting movement transversely of said strand to either side of its position of unstable equilibrium, position. means for traversing said reed supporting means synchronously with said strand, and means con trolled by said reed when it tilts a predetermined 11. In‘ a textile machine, means for guiding a textile strand through a machine, a stop device for said machine including slack detecting means amount in either direction from its position of unstable equilibrium for interrupting the power applied to said machine. embracing said strand and being operable upon 85 7. In a textile machine, means‘ for feeding a textile strand through said machine, means for periodically traversing said strand transversely of its direction of travel, a reed embracing said strand, means for pivotally supporting said reed 8. In a textile machine, means for guiding a textile strand through a machine, a stop device for said machine including a drop-reed for em bracing said strand, and means for imparting tilting of said reed to either side of its unstable 30 excessive slack in said strand or upon a break therein to stop said machine, and means for im parting simultaneous traversing motion to said guiding means and to said slack detecting means. SIMPSON JAMES ADAMS. 40 WILLLIAM ARCHIE SMITH.