US2361779A - Wrap yarn stop motion - Google Patents

Description

Oct. 31, 1944. w. c, LEE

WRAP YARN STOP MOTION Filed Sept. 10, 1941 8 Sheets-Sheet l Wye/V702: I'M MM! 6. 55;

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Oct. 31, 1944.

W. C. LEE

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WRAP YARN, STOP MOTION Filed Sept. 10, 1941 8 Sheets-Sheet 8 fzvr/zmaza Patented Oct. 31, 1944 UNITED STATES PATENT OFFICE f WRAP YARN STOP MOTION William C. Lee, Pawtucket, R. 1., assignor to Hemphill Company, Central Falls, R. 1., a corporation of Massachusetts Application September 10, 1941, Serial No. 410,239

. mechanism of Fig. 20 just about to be released;

8 Claims.

This invention concerns a stop motion for knitting machines, more especially, a stop motion which will function upon an abnormal condition in any of the pattern threads such as wrap threads commonly employed for ornamenting knitted fabrics.

In the figures of the drawings:

Fig. 1 is an elevation showing parts of the stop motion adjacent the wrap thread take-ups;

Fig. 2 is an elevation of the same mechanism as seen from a different viewpoint;

Fig. 3 is an elevation of the lower part of the frame at one side, at the level of the main cam drum and the control operating from that drum;

Fig. 4 is a section through the lower part of the frame showing in plan the same end of the cam drum and controlling means operating therefrom as in Fig. 3;

Fig. 5 is an elevation of the part of the stop motion seen in Figs. 1 and 2, but viewed from the back of the machine;

Fig. 6 is a detailed view of the latching device of Figs. 1, 2 and 5;

Fig. '7 is a sectionshowing the pivot for the upper part of the stop motion;

Figs. 8, 9 and 10 are details of the detent and illustrate how the same is engaged by a wrap thread take-up when the same has reached an abnormal position;

Fig. 11 is a section through part of the frame at the driving side thereof and shows the belt shifter and mechanism for controlling the same by the stop motion;

Fig. 12 is an elevation of parts illustrated in Fig. 11, but as seen from the side of the machine rather than from the front;

Fig. 13 is a section showing "details'of the belt shifter latching and releasing means;

Fig. 14 is a detail view which shows means for setting the stop motion when the belt is shifted to starting position;

Fig. 15 is a detail view showing part of the mechanism of Fig. 14 as seen in plan;

Fig. 16 is a view similar to Fig. 15, but showing the mechanism tripped to a different position;

Fig. 17 is a similar view with the parts in a third position;

Fig. 18 is a section further showing the construction and details of parts illustrated in Fig. 15;

Fig. 19 is a similar section but corresponding to the position of the parts illustrated in Fig. 17;

Fig. 20 is a small detail of the belt shifter latching means;

Fig. 21 is a similar detail view but showing the Fig. 22 is still a third detail of these parts after the belt shifter has been released and has moved to a position at which the belt would run on the idler pulley; and

Figs. 23 and. 24 are elevations, one from the front and the other from the side of the machine, and showing a positive control for throwing the belt shifter automatically but independently of the stop motion at the wrap thread, as when stopping at the completion of some part of the knitting cycle.

' Stop motions are commonly employed in knitting machines for various yarns, but they are not employed ordinarily for pattern threads such as wrap threads so that, when knitting hosier'y'or other fabric in which wrap threads are forming a pattern, the machineoperator must very carefully watch to see that none of the wrap threads become broken or are otherwise improperly feeding. Of course, if a wrap thread is broken and knitting of the article continues, the same will undoubtedly be a second since part of the pattern will fail to appear for that period of time during which knitting has progressed since the break occurred. Mechanism disclosed and claimed in this case functions automatically to stop the knitting machine whenever a wrap thread breaks, the supply thereof runs out or excessive slackness occurs in any one of the feeding threads. According to the principles of the invention a detent is so positioned as to come in the pathway of moving wrap thread take-up means, but is not to be contacted by those take-ups except in the event one of them is moving in such an extreme position as to indicate that a break, slackness or total absence of wrap thread has occurred. The I stop motion is set off by contact of any one of the take-up means with the detent, and by means of suitable connections, trips the belt shifter, clutch release, or some other control of the driving means for the machine so as to shut off power and stop it.

The present mechanism is operated mechanically but it is to be understood that electrical connections may be employed and the unlatching or releasing of the belt shifter, clutch, or other driving connections, may be brought about by energizing a solenoid if it is desired to control electrically rather than mechanically. Accord ing to the preferred form of the invention, the stop motion is set off by means of contact made with one of the wrap thread take-ups, however, it is to be understood that contact maybe made with any other elements controllable by the wrap threads which may move in one position or positions while the thread is feeding properly, but to another upon improper feeding.

During the knitting of the wrap pattern the stop motion is positively maintained in active position. When wrapping is not going on as during the knitting of a top, heel or toe of a stocking, automatic control is provided for moving the detent means of the stop motion from a position in which it might be contacted by one of the take-up arms or other wrap thread controlled device originally designed to be engaged by the detent. Preferably, this automatic control works with the control for bringing the wrap mechanism into and from wrap. thread feeding position. However, it is to be understood that a separate and distinct control may be employed so long as timing is properly maintained. For purposes of illustration the following description and reference to figures of drawings shows the stop motion as applied to a typical Banner wrap machine. That is merely by way of illustration and it is to be understood that the stop motion is applicable to any type of wrapping means and is in no way especially dependent upon nor usable with that type of eccentric wrapping means only. The stop motion may be used with concentric wrap thread feeding means and is equally applicable to individual needle wrapping devices, as well as those v adapted to wrap panels of needles as are the socalled Banner machines.

Referring to Figs. 1 and 2, part of the wrap mechanism has been shown including a tube I, a plate 2- supporting a plurality of wrap thread supplies 3, and a second plate 4 which supports the wrap thread take-up arms and lock or clamping means for-those threads. Each of the threads passes upwardly through eyelets I and 6, then beneath the curved ends 1 of levers 8 pivoted at 9 in the posts Ill. As described in United States Patent #2,091,407, the yarns are clamped by the said levers 8 as each lever is urged into clamping position by a spring H. Then the wrap threads pass through a wire guide 12 and are threaded through the ends of take-up arms l3 pivoted at a hub l4 and urged into an uppermost position by springs I 5 The wrap threads are then carried down through eyelets I6 and other wrap mechanism to be taken by selected needles all as is well-known to those familiar with the Banner wrap type machines.

There are a plurality of wrap thread supplies varying according to the particular pattern being knitted and according to the purpose for which the particula wrap machine has been originally designed. Each wrap thread has individual thereto one of the clamping mechanisms and a take-up arm. Each thread individually affects its take-up pulling the same downwardly to about the dot and dash line position of Fig. 1 at which time, as explained in the patent above mentioned, the lever B will be pulled downwardly to release wrap thread as the same thread is taken to be incorporated in the fabric. The takeup arms l3 play up and down through a reasonable angle as the machine'is in operation, but normally are not drawn upwardly to the position of Figs. 1 or 2 unless a wrap yarn supply is expended, the thread breaks or there is undue slackness for some particular reason.

At the upper part of the machine structure driving mechanism for the wrap means is enclosed within a casing including as a part thereof the boss or extension l1. On a plate l8 attached to this boss I! is bolted an upstanding bracket l9 which serves as a support for that part of the stop motion adjacent the upper end of the wrap mechanism. That includes a detent and tripping mechanism which in turn function through a Bowden wire cable to unlatch the belt shifter, clutch release, or other device inherent in the machine as built and to be aflected when the stop motion is attached. A second bracket member generally indicated by numeral 20 is pivoted as in the detail view, Fig. '7, and has a rearwardly extending arm 2|. to which is connected a link for moving the said bracket 20 to and from a position in which the stop motion may be considered active. The said bracket 20 is forked to have two parts 22 and 23 into which are threaded the cone-pointed screws 24 and 25. Each of these is maintained in a set position by a locking screw. The conical ends of these screws 24 and 25 engage within correspondingly shaped openings in the upper end of bracket [9. By proper adjustment the bracket 20 can be maintained in exact alignment, yet may easily be moved to and from its so-called active position. Movement of the bracket 20 is limited in one direction by a screw 26 adjustably retained in the extension 21 at the forward end of bracket 19, and in the other direction, by a second and similar screw 28 in a rearwardly projecting extension 29. By adjustment of these screws the amount of swing as well as the exact extreme positions of the bracket and all mechanism carried thereby may be set. The screw 26 is engaged by a sort of shelf 30 while the arm 2| is engaged by screw 28.

Bracket 20 has a forwardly extending part 3| which engages a spindle 32 rotatable in a bearing 33 at the end of extension 3| and a similar bearing at the upper end of the bracket casting itself. As shown in Figs. 1, 2, 5 and 6, a slide 34 has an elongated slot engageable about two shoulder screws 35 and 36 and by which the said slide is properly guided vertically to move up or down. A spring 31continuous1y urges the slide upwardly, said sprin having suflicient tension therein to pull the slide, when released, upward with the Bowden wire 38 for the purpose of setting off the power control mechanism later to be described. This Bowden wire 38 extends downwardly within a flexible tubing or casing 39 and is of the usual construction. Slide 34 has a catch '40 which is engageable, as illustrated in Fig. 5, by a swinging latch 4| fixed to the crooked lever 42, that being in turn attached to the end of and rotatable with spindle 32. The lever 42 has a downwardly projecting extension 43 engaged by an adjustable stop screw 44 and by means of which, movement of the spindle 32 and all attached parts is limited in one direction. A spring 45 attached to the outer end of lever 42 and to an extension 46 at the upper end of the bracket casting tends to rotate the said spindle and all mechanism fixed thereon in a direction to cause latch 4| to engage the complementary catch whenever the slide 34 is moved downwardly to a set position. Fig. 6 illustrates these parts when the latch mechanisms have been released and when spring 31 has drawn slide 34 upwardly until its movement is stopped by the adjustable screw 41.

Now referring to Figs. 1, 2 and 8, 9 and 10, a hooked arm 48 is adjustably clamped in fixed position at the end of spindle 32 adjacent the wrap mechanism and limits the movement in one direction of a freely swinging arm 49 carrying a blade or trigger 50. A collar 5! is set screwed to the end of spindle 32 merely for the purpose of retaining the arm 49 although the same is free to swing on the spindle. When in the position of Fig. 1, trigger it is engageable by the ends of take-up arms l3 and when so engaged, will be moved in the direction of Figs. 8-10 so that the spindle 32 will be rotated throughout a, slight angle just sufflcient to move latch 4| to the dot and dash line position of Fig. 6. That releases the slide 34 so that the parts move to the position of Fig. 6. When the wrap threads are being fed in a normal way, take-up arms |3 never move upwardly to such an extent thatthey enga e trigger 50.

Referring to Figs. 1, 2, 3, 4 and 5, a link or rod 52 connects at the outer end of the lever or arm 2| making a sliding connection thereat, effecting movement of the arm and thus the entire movable structure connected by post l9 as either one or the other of springs 53 and 54 engage the connection 55 within which the said rod is free to slide. Adjustable collars on the link 52 determines the amount of tension the springs may exert. Since movement of the link 52, accordin to the present construction, is greater than any necessary movement of the end of arm 2|, the springs 53 and 54 will be compressed after the movable bracket and attached parts have been moved to active or inactive position as the case may be.

Link 52 connects at 56 to the outer end of a lever 51 which, incidentally, is that lever for moving the wrap spindle upwardly out of active wrap position, for example, when knitting a heel or toe or when transferring a rib top to the machine. This movement of the wrap mechanism is accomplished from one of the main pattern drums, the particular one here involved bearing reference numeral 58, Figs. 3 and 4. Cams 59, 60 and 6| on that drum are respectively for the purposes of lifting the wrap mechanism in the heel, toe and then in the top or at the transfer. These cams are engageable with a toe 62 of lever 63 pivoted in a bracket 64 at the side of the machine and connecting at 65 to a second link (1 rod 66 which also is pivotally attached at the point 56 before mentioned with respect to link 52 and lever 51. Weights generally designated at 61 serve to counterbalance the weight of the wrap mechanism so that movement of lever 99 and connected linkage is accomplished without undue strain on the racking mechanism for the main cam shaft. It will be observed that a hand grip 68 may be used for raising the wrap mechanism and also the wrap yarn stop mechanism independently of the automatic cam control.

As the wrapping means is raised by automatic control thereby stopping the wrapping, the stop mechanism will be swung to the position of Fig. 2 so that it is impossible for trigger 50 to engage any one of the take-ups Hi. It will be so raised at the heel. toe and in the knitting of a top such as an elastic garter top of any descript on, or when the machine stops for transfer of a rib top prior to knitting a leg and continuing portions of the article of hosiery. It can be removed from operation at any other desired time.

Now referring to Figs. 11-22, the actual stopping of the machine as initiated by the part of the device described above will be explained. In

the particular machine herein taken as an illustration. drive is through a belt to one of the pulleys generally indicated at 59, there being at least one driving pulley and one free pulley, and in some instances two change of speeds.

driving pulleys as for The stop motion may as well pin 98 threaded through lever ill.

work on a clutch or other power connecting means, the principle of operation being covered by a description of one form of drive. To shift the belt a fork 10 projecting from a sliding carrier or slider 1| is movable by means of a spring 12, Fig. 11. The sliding carrier 1| has a lower tubular part 13 freely siidable on the projecting stud 14 about which spring 12 is coiled. A squared slide 15 moves in a squared opening in the guide 15 and projects through an opening in the side of the frame 11. 1 Movement to the right, Fig. 11, is limited by contact of a pin 19 as the same brings up against the inside of said frame. Movement to the left islimited by an adjustable stop screw 19.' A handle 90 is used by the machine operator to shift the belt from a driving to the loose pulley or vice versa. When moved to driving position the belt shifter is latched as will hereinafter be described. To stop the. machine, this latch is released by the stop motion when actuated by one of the wrap yarn take-ups, or may be released by-cam control as at the termi nation of knitting an article of hosiery.

Referring to Figs. 11, 13, 20, 21 and 22, a lever BI is pivoted at 82 to the sliding carrier 1|. That lever 8| has a beveled catch 83 for engagement with a latch member which is in turn attached to a horizontal projection 85 extending from the lever arm 86, Figs. 11 and 13, to the outer end of which is connected the Bowden wire 38. The lower end of the casing 39 is held by a holder 91, that being part of a bracket 89 having a boss 89 into which is threaded screw 9|) upon which the hub 9| of the lever the stop motion is set as in Fig. 5, the lever 95 drops to the position of Fig. .11 so that the latch 94 engages catch 83, that is, if the slide 1| is moved to the left. Fig. 11. so that the belt is on a driving pulley. A spring 92, Figs. 11 and 22, urges the lever 8| and the catch upwardly to a latching position. When the Bowdenwire 38 is pulled upwardly after the stop motion is set off, latch 94 will be raised so that it will disengage catch 93.

- Spring 12 will then move the slide 1| to the dot and dash position at the right, Fig. .11 and the belt will be shifted to the loose pulley. Upward movement of catch 83 is limited by adjustable stop screw 93.

It can be seen that if the stop motion is not tripped and catch 83 is engaged by the latch 84, an' unlatching means for manual use must be provided. A lever 94 is pivoted at 95 and has an extension 96 which projects along side of the handle 80. This lever 94 has a short projection 91, shown dotted in Fig. 11, engageable with a The machine operator merely grips thehandle and squeezes extension 96 toward the handle drawing the lever 8| downwardly againstthe tension of spring 92 thereby disengaging catch 83 so that the spring is free to move the slide as previously described with respect to automatic operation.

If the stop motion is set off automatically raising lever 86 and unlatching the slide for shifting the belt, the normal way to start the machine is for the operator to push the slide by engaging handle 80 until catch 83 reaches latched position. However, if the stop motion is not again set so thatthe elements 40 and 4| are engaged, latch 84 would be raised beyond any possible contact with catch 83. The belt would not remain in the shifted position but would be moved back to g the loose pulley as soon as the operator let go is freely pivoted. When Mechanism will presently be deem.

scribed whereby the machine is started and stop motion is automatically reset.

The latch 84 is carried by an extension 85, Fig. 13, that extension curving around and running parallel to the slide II to constitute an arm 99 which also swings about the pivot 90. This arm has attached at its lowermost side a triangular shaped cam I adapted to be engaged by a pin IOI threaded into a small pivoting element I02. This element I02 pivots at I03 and is drawn by a spring I04 to the position of Fig. 15 so that the cam I00 will be engaged by pin IOI upon relative movement between the two. The pivot I03 is in the form of a shoulder screw threaded into part of the slider II so that the pin really moves with the slider. An adjustable stop screw I05 abuts against a lug I06 extending upwardly from the slider limiting movement of the element I02 in one direction.

Upon moving the belt shifter to the left, pin IOI will be moved with it and is disposed at such a level as to engage the inclined surface of the cam I00, see Figs. 14, 18 and 19. As the pin affects the cam I00 by pushing it downwardly, the lever 99 will be moved to swing lever 86 extending from the same common hub 9|, drawing down Bowden wire 38 until the interengaging elements 40 and M assume a latched position, Fig. 5. Thus as the machine is started by moving the belt shifter, the stop motion is also set.

To provide for the opposite movement of the belt shifter without affecting improper engagement between pin IOI and cam I00, spring I04 allows the pin to swing outwardly, Fig. 16; the two elements pass each other without difficulty due to the fact that pin ml is resiliently supported. In the opposite direction cam I 00 is affected by the pin in such a way as to reset the stop motion. In Fig. 14 a third arm I0! extending from hub 9I has a stop screw I08 which abuts against the guide I6 limiting movement of the other lever arms 86 and 99 to about the position of Fig. 14.

Referring to Figs. 23 and 24, mechanism is shown which will stop the machine at the end' of knitting each individual article independently of the wrap yarn stop motion already described. This is to be used when transferred tops are employed or at any other time when the machine is to be stopped at the end of knitting one stocking and started again on the next. The machine as described up to this point has been adapted for continuous operation as when knitting in string work. A plate I09 at the end of the main cam shaft on the driving side of the machine has a projecting cam IIO engageable with the toe II I and a lever I I 2. This lever also has connected adjacent the free end an offset link I I3 which extends upwardly and projects through the end 86' of lever arm 86. A collar H4 is adjustable and serves when cam II 0 strikes toe I II of the lever raising link II3, to lift the lever arm 86 thereby disengaging latch 84. In other words, at one particular point in the cycle, a cam is employed positively to release the belt shifter so that the automatic stop motion control is supplemented by independent positive means for stopping the machine at any desired time or times.

Operation A brief summary of the operation will noW be made so that one may understand the precise manner in which the described mechanism works. Assuming the machine to be knitting in so-called string work and threaded up for wrapping, the wrap spindle and mechanism rotated therewith will have been moved downwardly to active position, that is, the toe 62 of the lever shown in Fig. 3 will be resting on the drum 58. That also assures that the stop motion will have been moved from the position of Fig. 2 to that of Fig. 1 so that trigger will be in the pathway of takeups I3 in the event any one of those take-ups move upwardly to an abnormal position. Now so long as wrapping continues in an intended way there will be no contact, but if a wrap yarn breaks or a supply runs out, or any one of the wrap yarns becomes excessively slack, one of the take-ups will move upwardly and will strike trigger 50 swinging it as illustrated in Figs. 8-10, thereby rotating spindle 32 throughout a slight angular extent to draw the latch 4I against the tension of spring 45 and away from the complementary catch 40.

The spring 31 will then draw the slide 44 upwardly to the position of Fig. 6 pulling Bowden wire 38 up through a corresponding extent to lift lever 86, Fig. 11, and thereby draws the latch 84 away from contact with catch 83. That will then free the slide II so that spring I2 may quickly move it to the right, Fig. 11, shifting the belt from a'driving to a loose pulley.

When the trouble has been remedied and the machine may again be started, the operator mere ly grasps handle pushing the slide II to the left thereby shifting the belt back to a driving pulley. During this movement of the slide to the left, the stop motion will be reset as cam I00 is engaged by the pin WI. The pin ID] will by its contact with cam I00, force the extending arm 99 which is in effect an extension from the same piece from which lever 86 projects, in a downward direction swinging these elements about their pivot and pulling downwardly on the Bowden wire 38 so that slide 34 is drawn back against the tension of spring 31 until the elements 40 and M are engaged. This completes starting the machine and resetting the stop motion so that it will be ready to function again when needed. In the event the machine operator wishes to stop the machine and the stop motion is not being affected by any one of the take-up arms I3, handle 80 is gripped and the extension pressed toward the handle pulling downwardly on the arm of which catch 83 is a part. That will unlatch the slide II so that it will quickly move to the right to shift the belt from a driving to the loose pulley. When so doing, the stop motion, and in fact, all elements including latch 84 which are affected when stopping is initiated by the stop motion itself will remain undisturbed.

In the event the machine is to be automatically stopped at some particular point in the cycle at predetermined times, the mechanism of Figs. 23 and 24 acts by positively moving the lever 86 to release the slide. Such mechanism would work in a hosiery machine to stop the same after com pletion of an article and before starting the next. Whenever the wrap mechanism is moved from its active needle wrapping position as by cams 59, 60 and BI, the stop motion will be swung to understood that it may be practiced anywhere desired and cams 596I may be refashioned or repositioned to accomplish that end.

The invention has been described in more or less specific terms and by reference to a preferred embodiment of the same, but that is not to be taken in a limiting sense since many modifications will be apparent to those skilled in the art and will fall within the scope of the appended claims.

I claim:

1. In a circular knitting machine the combination of driving means including a belt and a belt shifter for moving the belt to and from engagement with a driving pulley, a latch for holding said belt shifter in a position in which the belt is in engagement with the said driving pulley, spring means for moving the belt shifter in a direction to render the drive ineffective upon release of said latch, wrap thread feeding means and a stop motion adjacent said wrap thread feeding means having a trigger engageable by a yarn controlled element on said feeding means, a. latch operated by said trigger and connections from said latch to said belt shifter latch for releasing the belt shifter latch whenever said wrap thread controlled element moves to an abnormal position. i

2. A stop motion for a circular knitting machine having wrap thread feeding means including in combination means engageable with wrap thread controlled elements, means for moving the wrap thread feeding means to and from a feedin position and other means operable therewith for simultaneously moving the stop motion to and from a position to be engaged by the wrap thread controlled means.

3. In a circular knitting machine the combination of wrap thread feeding means and a stop motion operable by engagement with a wrap thread controlled element, pattern controlled means for moving the said wrap thread feeding means to and from wrapping position and other means for simultaneously rendering the stop motion effective and ineffective with the wrap thread feeding means.

4. In a circular knitting machine the combination of wrap thread feeding means including take-ups for the wrap threads movable to diflerent positions, a stop motion including a pivoted bracket and a trigger, the latter being engageable by one of the 'wrap thread take-ups whenever the said take-up shall move to an abnormal position, pattern controlled means for varying the position of wrap thread feeding means to render the same active or inactive and other means acting therewith simultaneously to move the pivoted bracket so that the trigger carried thereby may not be engaged by any one of the wrap thread take-ups.

5. Ina circular knitting machine the combination of wrap thread feeding means, a stop motion operable from the wrap thread feeding means, a

trigger and a slide, a spring for moving the slide in one direction and a latch mechanism for retaining it in a position against the tension of the spring, the control being such that movement of the trigger will unlatch the slide 50' that the spring may move it in the opposite direction, power controlling means on the machine for effecting engagement of a driving means. and a Bowden wire connecting said slide and said power controlling means for varying the position of the latter upon movement of the said slide.

. 6. In a circular knitting machine the combination of a wrap thread feeding means, a stop motion operable upon abnormal slackness of any one of the wrap threads, a belt for driving the machine and a beltshifter for varying the position of the belt, a latch for holdingthe belt shifter in that position in which the belt will drive the machine and spring means for moving the said shifter to a non-driving position upon release of said latch, a Bowden wire connection between said stop motion and said latch for the belt shifter and cam means so constructed that as said belt shifter is moved to a latched position for starting the machine, the Bowden wire will be drawn in such a direction as to reset the stop motion.

7. In a circular knitting machine the combination of a stop motion including a spring urged slide and a latch for retaining said slide in a set position against the tension of said spring, power driving means for the machine and controlling means for said driving means for shifting the position thereof to render the driving means ineffective, latching means for said controlling means for retaining it in a position where said driving means will be effective and resilient means for changing the position thereof to render the same ineffective upon release of said latching means, connecting means between said slide and the power controlling means and cam means eflective upon movement of the power controlling means for resetting the slide and thereby positioning the stop motion for further operation whenever the power controlling means is moved in a direction for starting the machine.

8. In a circular knitting machine the combination of driving means and means operable for rendering said driving means ineffective, wrap thread feeding means, a stop motion engageable therewith for actuating said means for rendering the driving means ineffective, means for moving said wrap thread feeding means and said stop motion out of operating position and means for automatically resetting said stop motion when in operative or. inoperative position whenever said driving means is operatively connected to the machine.

WILLIAM C. LEE.

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