US2399148A - Stop motion for drawing frames - Google Patents

Description

April 23, 1946. w SCOTT STOP MOTION FOR DRAWING FRAMES 2 Shets-$heet 1 Filed April 27, 1944 V 2 Mimi-IE 'i'lllilllllialrlliiaa llilillllllll pabllppllll INVENTOR VVz/re/ $001.!

qfimzyw v ATTORN EY S A ril 23, 1946. w. J. SCOTT 2,399,148

STOP MOTION FOR DRAWING FRAMES Filed April 27, 1944 2 Sheets-Sheet 2 INVENTOR Z Vb'Z/e/ ([630 01 ATTORNEYS Patented Apr. 23, i946 umrso 's'rn'rs BN1 tract This invention relates to an electric stop motion for a drawing frame.- In the use of a stop motion for individual slivers which go to make up a single end in the drawing frame, one sliveris aptto be supported on the other in the arrangement shown in my Patent 1,722,769, .while in the showing in my Patent 1,848,667 a Silver mustrun completely through the guide for the stop motion to operate which makes piecing up difllcult.

One oi the objects of this invention is to provide an individual control for each of the slivers between the supply source and the drafting rolls" which will operate at once upon the silver being severed even though severed adjacent the supply package. 7 7

Another object of this invention is to provide a feeler arm to be held out of engagement with the electric closing circuit contact by the sliver so that should the sliver be ruptured or break or the tension becomes slack the arm will move into electric circuit closing position.

Another object oi this invention is to so position the stop motion that the machine may be brought to rest prior to the sliver running to the drafting rolls so that'the broken end may be more readily pieced up. 4 I

Another object of the invention is to provide a more'simple and yet more positivepivotal mounting for the member which engages the silver and rocks upon the sliver or slackened. 5 I

with these and other objects in view, the in- ;vention consists of certain novel features of conbeing broken Fig. 8 is a diagrammatic view illustrating the wiring of the'electricstop motion.

In proceeding with this invention,- I mount between the sliver supply packages and the silver. guide adjacent the drafting rolls a device having a contact feeler arm for each individual sliver. The arrangement is such that each feeler arm tends to swingbygravity toward a contact but is held therefrom by "resting upon the sliver Thus should a sliver break. adjacent the supply packagethe sliver quickly falls away from the feeler arm permitting it to'dropimmediately to stop the machine and leave a long end of sliver for piecing up and continuing operation.

With reference to the drawings more specifically I have illustrated a creel in having a plurality of -sliver supply packages H. mounted thereon. The sliver ends I! extend from each of these packages "through aguide opening or notch I3 and thence'a plurality of slivers .ar' grouped together as at It and extend through the rolls l5, l6, l7,and l8, thence through the. carrier rolls l9 and 20 to the delivery roll 2| 0! the drafting device. The yarn is then conducted by the flyer '23, to be twisted and packagedas at 24 on the package which is rotated by the spindle25,driven by the pulley 2B and belt 27 from the driving drum 28. Traverse may be had by means of the rack and gear 29 andjfl.

The device which forms'the subjectof this invention is a stop motion designated generally 3| and located, as shown in Fig. 1, between the supply packages II and the guide just back of struction. as will be m r f lly described a as the drafting rolls comprising the' series of particularly pointed out in the appended claims.

In the accompanying drawings;

Fig. 1 is a diagrammatic view partly in section illustrating the silver from the supply package passing through the drafting rolls and being twisted and packaged on a spindle;

Fig. 2 is a view looking substantially on line 2-2 of Fig. 1: Fig. 3 is a section on substantially line 3-3 of Fig. 2;

Fig. 4 is a sectional view contact feeler arms;

through one of the Fig. 5 is a view of a fragmental portion of 'the showing in Fig. 2 on a much larger scale;

Fig. 6 is a sectional view on substantially line 0-4 of Fig. 5;

Fig. 7 is a sectional view illustrating the mounting of one of the electrical circuit members showing it insulated from a mounting frame;

and

[notches l3. This stop motion consists of a frame having a horizontal mounting bar32 and 81 therein.

upstanding guide bars 33 between which each silver I! passes. An upstanding support 34 pivotally mounts a plurality of contact feeler arms 35, each arm being'provi'ded with a threaded opening 36 for the reception of a threaded bolt This threaded arrangement provides a unique and simple mounting for the arm'35 in a pivotal manner. The bolt itself extends through an opening 38 in a-support 34 and is held in position by a nut .39 and washer 40. The threads of the memberj'l prevent lateral movement ofthe arm .35 except in so far as allowed by the rocking movement of the arm on the member 31. The rocking movement and lateral movement caused by the threads keep a clean electrical contact at all times and provide a very efl'cctive electrical connection to each of the feeler arms. The support 34 is of metal as are the feeler arms and consequently this may be considered the ground side of an electric circuit. A weight 4| is adjustably held by the set screw 42 on the arm 35 at one side of the pivot. The arrangement which I have shown, as in Figs. 2 and e 5, is such that the arm on the side of thepivot the bar upright support 34 in spaced relation to the support 34 (see Fig. 8), the opening through which it extends 44 being of a size larger than the contact pin 43. through this opening from a bar 45 which is connected by the wire 46 in an electrical circuit. A plurality of these contacts 43 extends through support 34- from bus bar 45 as shown clearly in Fig. 3, there being one of these contacts for. each of the arms which are arranged in vertical superposed relation. A stop 41 extends outwardly from the support 34 on the opposite side of the arm 35 from the contact (see Figs. 21 and 5) and would limit the upward, movement of the'arm 35 by reason of this stop.

If it is desired to hold any one of the arms away from its contact 43 this may be accomplished by reason of the lever 48, (see Fig. 6), pivoted as at 49 on the bar 34 in a manner so that there is sufficient friction to maintain this lever in any adjusted position. Thus, the lever may be swung from the position shown at the lower part of Fig. 6

to the position shown at the'upper part of Fig. 6

so that its arm 50 will engage the feeler contact arm ,35 pressing it downwardly so as to move the diately-drop to engage the contact pin 43. An

electric circuit is thus established such as shown in Fig. 8 from the electrical supply 55 through the line 56 to the frame 34, thence through me- 'tallic parts, including each of the feeler contact arms 35, thence to the live contact 43, thence to bus bar 45, and wire and by line 51 to a metallic connection through the lever 58 to the electromagnet 59, thence back by line 60 to the supply 55. Thus, the electromagnet 591s energized which tips the latch 61 carried by the lever 58 to permit the spring 62 to move the lever and shift the rod 63 to move the belt from the tight pulley 64 to the loose pulley 65 and stop the machine.

Should it so happen that onlyfour ofthe five slivers were desired to provide an end, then one of the arms 35 would be locked in inoperative position by shifting the lever 48in the position shown in Fig. 6 and the other arms would function in a normal manner.

I claim:

1. An electric stop motion for a drawing frame comprising an electric circuit, draft rolls, a set of a plurality of sliver supply sources for supplying a composite end to said draft rolls, guides positioned adjacent said draft rolls on the side thereof nearest said supply sources for guiding said slivers in spaced relation from each source to The contact pin 43 extends ply sources/elongated contact feeler arms one for each sliver pivotally mounted on said support on the side thereof nearest said supply sources and each weighted to swing in a plane extending substantially vertically to close said electric circuit but held from such closing position by resting against a normally tensioned sliver whereby upon slackening of a sliver the arm will swing to close said circuit'and means responsive to the closing fof said circuit for arresting the drawing of said end.

2. An electric stop motion for a drawing frame comprising an electric circuit, draft rolls. a set of a plurality of sliver supply sources for supplying a composite end to said draft rolls, guides positioned adjacent said draft rolls on the side thereof nearest said supply sources for guiding said slivers in spaced relation from each'source to said rolls,

' contact'arm to limit movement of the arm in a said rolls, a support separate of said guides posi- I tioned at a location between said guides and supa support separate of said guides positioned at a weighted to swing in a plane extending substantially parallel to said support to swing to close said electric circuit but held from such closing position by resting against a normally tensioned sliver whereby upon slackening of a sliver the arm will swing to close said circuit and means responsive to the closing of said circuit for arresting the drawing of said end.

3. An. electric stop motion as set forth in claim wherein individual means are provided to hold each contact arm inoperative.

4. An electric stop motion as set forth in claim 1 wherein a stop'is located adjacent each direction away from circuit closing position.

'5. An electric stop motion as set forth in claim 1 wherein a stop is located adjacent each contact arm to limit movement of the arm in a direction away from circuit closing position and means are provided to hold each arm against its stop.

6. An electric stop motion as set forth in claim 2 wherein individual means are provided to hold each contact arm inoperative.

'7. An electric stop motion as set forth in claim 2 wherein a stop is located adjacent each contact arm to limit the movement of the arm in a direction away from circuit closing position.

8. An electric stop motion as set forth in claim 2 wherein a stop is located adjacent each contact arm to limit the movement of the arm in a direction away from circuit closing position, and means are provided to hold each arm against its stop.

9. In an electric stop motion for a drawing frame, an electric circuit, a contact feeler arm for closing said circuit, means to pivotally mount saidarm comprising an opening in said arm and a member extending into said opening, said opening and member having interengaging threads.

10. In an electric stop motion for a drawing frame, an electric circuit, a contact feeler arm for closing said circuit, said arm having a threaded opening, and a threaded mounting member in said opening engaging said threads sufiiciently loosely for pivotally mounting said arm.

WALTER J. SCOTT.

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