US1634614A

US1634614A - Stop-motion device for spinning frames

Info

Publication number: US1634614A
Application number: US69724A
Authority: US
Inventors: John P Garey; Louis B Hasbrouck
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-11-18
Filing date: 1925-11-18
Publication date: 1927-07-05
Anticipated expiration: 1944-07-05

Description

- 1,634,14 July 5,1927. GARE? ET AL 6 STOP MOTION DEVICE FOR SPINNING FRAMES Filed Nov. 1925 4 Sheets-Sheet 1 (ATTORNEY 1, 34,614 1927' J. P. GAREY ETVA L STOP MOTION DEVICE FOR SPINNING FRAMES Filed. Nov. 19925 4 Sheets-Sheet 2 INVENTORS AT ORNE 1,634, 14 July 1927' J. P. GAR EY ET AL 6 STOP MOTION DEVICE FOR SPINNING mums Filed Nov. 1 1925 4; Sheets-Sheet 3 aze? 1'3 INVENTORS I 1 M I M1,,W @M

WW v

AT ORN Y July 1927" J. PL GAREY ET AL STOP MOTION DEVICE FOR SPINNING FRAMES Filed Nov. 1925 4 Sheets-Sheet 4 Patented July 5, 1927.

mean

JOHN P. GrAIEtEY, F ELMIRA HEIGHTS,

AND LOUIS B. HASBROUCK, or ELMIRA, NEW

YORK. 1

- STOP-MOTION DEVICE FOR SPINNING FRAMES.

Application filed November 18, 1925.. Serial No. 69,724.

This invention relatesto stop-motion de vices for spinning frames. and aims to pre vent the waste of spinning material and injury to the machinery on thebrealring .of a roving by stopping the feed of the brolren roving to the drawing rolls. An object of the invention is to provide a device ofthis character which is certain in operation and at the same time causes no additional strain on the rovings, and one which is simple in'construction and adapted to be installed on existing spinning frames in a position in which it does not interfere with the normal use of the frame nor with the cleaning of the frame and its rolls.

A stop-motion device embodying the invention includes stopping mechanisms located in advance of the drawing rolls, which are operable by power from a moving part of the spinning frame and controlling mechanisms adapted on the breaking of any roving in or beyond the drawing rolls to bring into operation the stopping mechanism associated with that roving. I ()ther features and advantages of the invention will be explained in connectionwitli a detailed. description of a stoponotion device combining all the features of the invention inthe form which we now believe most desirable. Such a stop-motion device and portions of a cotton spinning frame of usual construction to which the device is applied are shown in the accompanying drawings, in which I Fig. l is an end viewof the spinning frame with parts broken away;

Fig. 2 is a. plan view of one end of the spinning frame omitting the creel holder and showing parts in horizontal section;

Fig. 3 is afragmentary vertical section on the line 38 of Fig. 2, showing the clutch in the transmission mechanism connecting the main shaft of the spinning frame with the power-driven members of the stop motion device;

Fig: i is a transverse section showing one roll beam, a portion of the table-and the drawing rolls of the spinning frame, and showing a unit of the stopemotion device in running position; v

5 is'a similar view on an enlarged scale showing the controlling. mechanism of one unit of the. stop-motion device-.inthe 'mechanism looking in the position which it assumes immediately upon the. breaking of the roving;

Fig. 6 is a similar view showing. the posistopping mechanism into operation;

Fig. 7 is a horizontal section of the con trolling mechanism and associated parts taken on the line 77 of Fig. 6;

i Fig. 8 is a vertical section ofthe coiitrol ling mechanism and associated parts taken on the line 8-8 of 6;

views sectioned on the lines 10-11 of Figs. .5 and 6 and showing two positions of the power-driven member and the cam of the controlling mechanism with which this ineinbercooperates; f

Fig. 12 is an elevation of the stopping mechanism of a unit looking in the direction of the arrow 12 in Fig. 4;

Fig. 13 is a vertical section of the Stopping mechanism taken on the line 1313 of Fig. 12,; j

i Fig. letis a plan view of'the stopping Y direction of the arrow 14 in Fig. 4;

Fig. 15 is a. detail view showing the construction ofthe actuatorof the stopping mechanism; and I Fig. 16 is a: fragmentary section on the line 16-16 of Fig. 5 showing the pivotal mounting of. said actuator.

The spinning frame shown in the drawings is of ordinary construction having end frames A supporting ahorizontal table B at the outer edges of which are the roll beams C from which the stands for the drawing rolls D are supported. The frame has the usual creel support E on which are supported the bobbins F from which the rovings are drawn, the usual supporting bar G over which the rovings pass on'the Way to the drawing rolls and the usual spindles H on which the spun yarn is wound. The

spindles are driven from the drum or tin rollerJ mounted on the main shaft K of the frame. The usual handles L and shifter bar M are provided for stopping and starting the mechanism of the frame. In a beitdriven 'frame the shifter bar stops and startstheme'chanism by moving a belt from tion which the controlling mechanism and associated parts assume in bringing the a driving to an idler pulley, while in the specific spinning frame shown the shifter bar M operates the controlling switch N of an electric motor which drives the frame.

The stop-motion device illustrated includes two power-driven members 1, 1 connected by transmission mechanism 2 to the main driving shaft- K of the spinning frame, and a number of units arranged along each side of the spinning frame so that one unit cooperates with the roving or rovings leading to each spindle of the frame. Each unit consists of a stopping mechanism 3 and a controlling mechanism The stopping mechanism 3 of each unit comprises a clamping member 5 held in a frame or housing 6 mounted on the bar G of the spinning frame, and has an actuator 7 which normally lies against the top of the table B of the spinnig frame. The controlling mechanism 1 of each unit includes a trigger 8 bearing a thread guide 9 and pivoted on a bracket or housing 10 secured to the outer side of one of the roll beams C of the spinning frame. \Vhen the roving passing through the thread guide 9 of the trigger 8 of any unit breaks, the trigger is moved by gravity to a position in which itis engaged by one of the power-driven members 1, 1 and serves to connect this member with the actuator 7 of the stopping mechanism of the unit so that power is transferred from the power-driven member to the clamping member 5 of the stopping mechanism, moving this member into position to stop the feeding of the broken roving to the drawing rolls.

The power-driven.members 1, 1 consist of bars slidably mounted in openings 11 in the housings 10 of the controlling mechanisms so that each bar extends lengthwise of the frame just outside one of the outer edges of the table B of the frame where. it in no wise obstructs the space between the table and the drawing rolls. The bars 1, l. are connected with the main driving shaft of the frame by transmission mechanisn'i 2 which is arranged to give each of them a longitudinal back and forth motion.

The transmission mechanism 2 is mounted on one of the end fraines A of the spinning frame and includes a short longitudnal shaft '12 driven by a belt 18 from the main shaft K of the frame, a cross-shaft ll havinga worm and gear connection 15 with the shaft 12 and

cams

16, 16 on the ends of the crossshaft which cooperate win cam followers 1?, 1'7 mounted on

plungers

18, 18 secured to the ends of the slide'bars 1, 1. The cam followers are held in engagement with the cams by means'of springs 19, 19 which cause the return strokes of the slide bars 1, 1 follow ingthe 'power'strokes caused by the came. The

front side of ea'cli'of the canis16,1'6 is steep so that th'e power stroke of eachfslide bar is "soraprd t it may "be considered a by a power stroke of one ofthe bars 1, 1', I

it is necessary that the power strokes of the two bars be in opposite directions. To obtain this result the. follower 17 which cooperates with the cam 16 is mounted directly on the outer end of the plunger 18 so that it engages the inner side of thecam 16, While the follower 17 which engages the cam 16 is formed on the inner side of a U-shaped extension 21 secured to the plunger 18' so that it engages the outer side of the cam 16; and the spring 19 is arranged to urge the plunger 18 and bar 1 toward the cross shaft 14 while the spring 19 urges the plunger 18 and the slide bar 1 away from the crossshaft. v

In order that the stop-motion device may not interfere with threading and piecing up the ends when the frame is started after dotting, it is desirable that the operation of the power-driven members 1, 1 be not'started immediately on the starting of the frame. lVith this in view, the pulley wheel 22 over which the belt 13 passes is loosely mounted on the shaft 12 and connected therewith through the medium of a toothed clutch 23, which is automatically opened when the mechanism. of the spinning frame is stopped and cannot be closed until after the meihanism of the frame has been started again. This automatic control of the clutchis obtained by connecting the actuator plate 94: of the clutch with a lever pivoted at 26 and hav ing its lower end in. line with the shifter bar M of the spinning frame. When the shifter bar M is moved to stop the mechanism of the frame, it strikes the lower end of the lever 25 and opens the clutch 23, as shown in Fig. While the shifter bar M remains in this, its stopping position, it prevents an inward movementof the lower end of the lever and thus makes it impossible to reenp'age the clutch 23. After the shifter bar M nas been moved inwardly tostart the mechanism. of the spinning frame, the clutch. 23 may be closed manually by means of a handle 27 on the actuating plate 24, thus bringing the slide bars 1, 1 into operation.

The controlling mechanisms .4 of the units alike so that descr'p. 1 one of hjm will suffice. The tr'gger of a controlling mechanism consists of lere mounted on a horizontal pivot 28 whose ends are supported in the housing 10. The pivot- 28 is located over the slide bar 1 and aho fie and outside the outer edge of the table "with thread guide 9 which is located di- "reptly above the one of the "spindles H, so that it may receive a roving directly from the drawing rolls D and direct it to a spindle. The inner or counterbalancing arm 80 of the lever is short so that it projects only a slight distance over the table of the frame. The lever 8 is loosely mounted on its pivot and is free to tip between a running position shown in Fig. 4, in which its outer arm 29 rests against a stop 31 in the front of the housing 10, and a second position shown in Fig. 5, in which a projection 32 on the inner arm encounters the outer arm 33 of the actuator 7 of the stopping mechanism of the unit. The lever 8 is normally held in its running position by the pull ot a roving passing through its thread guide 9. The'stop 81 against which the lever is held by the roving has the form of a V-shaped groove which holds the lever against vibration notwithstanding its loose mounting on its "pivot." \Vhen the roving breaks, the lever 8, is moved into its second position with its projection 32 against the arm 33 by means of ravity. For this purpose the weight of the innerarm 30 is made such that its moment about the pivot 28 is slightly greater than that of the outer arm 29. A slight difference in the moments of the two arms, amounting to only a few grains, is sufficient to cause the lever to tip into its second position when the roving breaks. The very slight difference in the moments of the two arms and the position of the pivot close to the line of travel of the roving result, in causing the thread guide 9 to exert no greater strain on the roving passing'through it than the frictional strain of the fixed pigtail or thread guide customarily used on spinning frames.

The change in the position of the trigger lever S which occursthrough the influence oi gravity when a roving breaks is utilized to control the transfer of power from the power-driven member 1 to the stopping mechanism 3 of the unit.

For this purpose the level" 8 is provided with a wedge-shaped ctr-11134 depending from its pivotpoint, and the.powerdriven member 1 is provided with upwardly projeeting thin cams or knives 35, one of which is located near each trigger. When the lever 8 is in its running position with its outer arm 29 in engagement with the stop,

31., its cam is located just inside the path of one of the knives 35, so that in each back and forth movement of the slide bar 1. the knife passes clear of the cam 34, as

"shown in Fig. 4, and in full lines in Fig. 10. When however, the roving breaks and the lever 8. under the influence of gravity, as-

suines its second-position shown in Fig.5

with its projection 32 againstthe arm 33, the-inclined surface 36' of, the cam 34 is brought into the path of the knife 35; as

best shown in Fig. 5,- and in dotted lines inFig. 1-0. The movement of the knife 35 then forces the cam 34 to move across its path and tilts the lever 8 further, forcing the projection 32 on its inner arm to depress the arm 33. Since the movement of ofthem willsuttice. The, stopping or elamping member of a stopping mechanism is pivot-ally held in a frame or housing (3 mounted on a supporting bar 3'7, which is "common to all the units on one sidefot the frame. The supporting bar 37 is attached. to the bar G- of the spinning frame by means of curved brackets 38. i

The stopping member 5 has the form of a cylinder with a roughened surface, ec- 'cent-rically mounted on ashaft 39 ournalled in'th'esides 40, of'the housing 6. The hous- 'ing 6' has an opening 41 between one of its sides and its floor 42 allowing the roving 'or roviugs from the bobbins to be threaded through it under the cylinder 5 and over the floor 42. The roving is directed into this position by guides consisting of'a pro- 'jection 43 extending downwardly from the top of the housing 6 and cut away at the center of its lower end and a plate 45 extending upwardly from a plate 46 secured to the floor 42 or the housing 6 by screws 47. V

Because of its eccentric mounting the clamping cylinder 5 may be turned, so that its roughened surtace'rests on a roving pass ing over the floor 42 of the housing 6 so as to clamp itas shown in Fig. 13, or so that its roughened surface is separated from the floor of the housing by distance sufficient to permit repassage oft a roving as shown in Fig." 4'. A crank 48 on one end of the "shaft 39 provides means for turning the clampingcylinder 5 from its free or inoperative position to its severing or operative 'p osition Qor"for turning it from its. operative position" to its inoperative position. In

turning betweenthese positions the cylinder 5 passes through a position in which its center of gravity isdirectly above the axis of' the shaft Consequently, the cylinder 'will'remain "inleither operative or inoperat-iv'ei position. 7 V I Passing through the bar 37 is a plunger 49 having an enlarged upper end 50 provided with a shoulder 51 which normally restsagainst the bar 87. .VVhen the clamp ingfcylinderb is in its: inoperative i011 -"the'-cr"a nk "48l'rests o'n the upper iid ot the plunger 49. Consequently, a sudden upward movement of the plunger 49 will throw the crank d8 upward and cause the clamping cylinder to rotate into its operative position.

The actuator 7 of the stopping mechanism serves to give the plunger 4-9 such an upward movement on the breaking of a roving. lt consists of a lever pivoted on a pin 5 mounted near the inner end ofthe housing of the controlling mechanism, and having a short outer arm 33 which, as already described, projects into a position to be engaged by the projection 32 on the inner arm of the trigger lever 8, and a long flat inner arm 53 cooperating with the plunger 49. The long arm 53 of the actuator is the only portion of the whole device which lies in the space between the table B of the frame and the drawnig rolls D, and this arm normally lies flat against the upper surface of the table where it in no way interferes with cleaning under the drawing rolls. The long arm 53 has at its outer end an enlarged portion 5-1- which is adapted to strike the lower end of the plunger 49 when the long arm of the lever is raised suddenly by the depression of the short arm 33 by the projection 32 of the trigger lever 8.

In order that, despite the continued movement of the slide bar 1, the actuator 7 of the stopping mechanism may be thrown up only once on the breaking of a roving, and in order that, after the operation of the clamping member 5, all the parts may be in convenient position for piecing up and rethreading the broken roving, the movement given to the trigger lever 8 by the slide bar 1 is made sufficient to cause the projection 32 of the trigger lever to pass beyond and under the short arm 33 of the actuator 7, and this short arm 33 is made yieldable in an upward direction, to permit a manual return of the trigger lever 8 to its running pos ition. F or this purpose the short arm 33 is made separate from the long arm 53 of the actuator, is separately pivoted on the pivot 52, and is provided with a plate 55 projecting under the inner end of the long arm 53 and normally held in contact therewith by the spring 56.

The hinged thread boards ordinarily used on spinning frames to raise the thread guides during the dofiing of the spindles are not used since the thread guides 9 are mount ed directly on the triggers 8. To replace the thread boards, means are provided for raising all the thread guides 9 on each side of the frame during dotting. To permit this, the two

arms

29, 30 of each trigger lever 8 are made separate from each other and each arm is independently pivoted on the pivot 28. The arms are interlocked .by means of a projection 57 on the arm 29 which normally engages a depression 58in the arm 30, limiting independent downward movement of the arms so that in the normal operation of the device the two arms act as a single rigid lever. The outer arm 29 with its thread guide 9 may be turned upwardly about the pivot 28 without moving the inner arm 30.? Such upward turning is permitted and limited by a slot 59 formed in a cover 60 which fits over the housing 10. A bar 61 at each side of the frame is provided for raising simultaneously the outer arms 29 of all the trigger levers 8 at that side of the frame. The bar 61 has inwardly extending brackets 62 which are pivoted to the outer ends of brackets 63 secured to the roll beam C of the frame between the housings 10. The

brackets

62 and 63 are inclined upwardly so as to provide space for the slide bars 1, 1.

In order that the stop-motion device which has been described may be conveniently applied to existing spinning machines whose dimensions may differ somewhat, means are provided for adjusting various parts of the device.

The housings .10 are adjustably secured to the roll beam C by means of screws passing through slots 6 in the housings, while the knives 35 contain slots 65 permitting a corresponding adjustment of their position on the slide bar 1.

The rear ends 54 of the actuators 7 may be adjusted laterally to insure their striking the plungers 49 in case the housings 10 are not located directly under the housings 6. Such adjustment is provided by making the long arm 53 of each actuator 7 in two parts 66, (57 having knurled surfaces 68 held in engagement by a screw 69.

The outer arm 29 of the trigger 8 is adjustable in length by means of the tele scopic arrangement shown in the drawings, so that the thread guide 9 may always be placed directly over the axis of the spindle.

In order to compensate for the change in the turning moment of the outer arm 29 caused by adjustment of its length, the inner arm 30 is provided with adjustable weights 70 which may be increased or reduced in number as required.

The use of the device which has been described is as follows,:-Du'ring the operation of the spinning frame, and after the clutch 23 has been closed, the trigger lever each unit remains in its running position and the clamping member 5 of each unit remains in its free position until roving happens to break in or beyond the drawing rolls. When such a break occurs, the trigger lever 8 cooperating with this roving causes one of the slide bars 1, 1 to operate the clamping member 5' of the unit in the manner already described, thus stoppingthe feed of this roving to the drawing rolls and p ev nti g the Wa e f spin ing mate al and the injuryto the rolls which'would otherwise occur. During this operation, the pros j ection 32 of the trigger lever 8 passes under the arm 33 of the actuator 7, permittlng the actuator and the plunger d9 of the stopping thread guides of the other units calls the operators attention to the breaking of the roving. The, operator then turns the crank 4-8 to move the stopping member 5 into ts free position, rethreads the broken roving through the thread guide 9 and pieces it. The unit remains inoperative during the rethreading so that the operator may, if necessary, make two or three attempts to piece up the broken roving without danger of bringing the clamping member into operation again. Then the piecing has been successfully accomplished, the operator presses down the outer arm 29 of the trigger lever 8, causing the projection 82 of the trigger lever to raise and pass above the yieldable armi33 of the actuator 7, and resetting the trigger 8 in its running position so that the unit is ready to operate in case of another break.

lV hen the frame has stopped, for dofiing the spindles, the bars 61 are tipped up to raise the thread guides 9 out of the way. .Vhen the mechanism of the frame is started again after dofiing, the clutch 23, which was automatically opened when the frame was stopped, is allowed to remain open until all the ends are threaded. The stop-motion mechanism is thus inoperative during the threading and in no way interferes with it. After the threading has been completed the clutch 23 is closed by means of the handle 27, bringing the stop-motion device into operation again.

What is claimed is:

1. A stopmotion device for a spinning frame, comprising a stopping member in ad Vance of the drawing rolls of the frame, a

power-driven member, and connecting mechanism for transferring power from the power-driven member to the stopping member, said power-transferring connecting mechanism including as an element thereof a nearly balanced lever mounted on a fixed horizontal pivot and normally held out of the path of the power-driven member by engagement with a roving between the drawing rolls and a spindleofthe frame. a

2. A stop-motion device for a spinning frame, comprising a fixed pivot, a nearly hal anced lever which is mounted on said pivot, engages a roving beyond the drawing rolls, and is urged to tilt in one direction bythe roving and in the other direction by gravity,

a fixed stop limiting the tilting of the lever by the roving, amovable stop limiting the tilting of the clever by gravity, a powerdriven member positioned to clear the lever when it rests against said fixed stop and to engage the lever when it rests against said movable stop and turn. it about its pivot forcing it to move said movable stop, and means actuated by suchmovement of the movable stop to stop the feed of said roving to the drawing rolls.

3. A stop-motion device for a spinning frame, comprising a movable thread-guide positioned to receive a roving directly from the drawing rolls of the frame and to guide it to a spindle, gravity means operative to raise the thread-guide on the breaking of a roving, power means operative thereafter to raise the thread-guide further, and means for stoppingthe feed of the roving operative on such further raising of thethreadguide. 7

r 4. The combination with a spinning frame, of a stop motion device, comprising a pivoted arm bearing a thread-guide for directing a roving to a spindle of the'frame, a fixed support located under said arm so that the arm is drawn against it by a roving pass ing through the thread-guide, gravity means for raising the arm from said support on the breaking ofgthe roving, and powerdriven means operative on a raising ofs'aid arm and thread-guide to stop the feed of sa d roving to the drawing rolls.

' 5. A stop-motion device for a spinning frame, comprising a stopping member in advance of the drawing rolls, a power-driven member, connecting mechanism for transferring power from the power-drivenmember to tie stopping member, said powertransferring connecting mechanism including as an element thereof a trigger mounted on a fixed pivot and movable into the path of the power-driven member, and a thread guide onsaid trigger positioned to receive a roving directly from the drawin rolls and to direct it to a spindle of the frame and serving to hold the trigger out of the path of the power-driven member while the roving is intact. y

6. In a stop-motion device for a spinning 'rame, the combinationof a movable thread guide positioned to receive a roving directly from the drawing rolls of the frame and to guide it to a spindle, gravity means operable to raise the thread guide on the breaking of a roving, power means operablethereafter to raise the thread guide further, and a yieldable catch for holding the thread guide in raised position during rethreading.

7. A stop-motion device for spinning frames, comprising a'stopping member, an actuator therefor, a trigger, a thread guide on said trigger positioned to receive a roving directly from the drawing rolls and to direct it to a spindle and serving to hold the trigger away from the actuator by engagement with a roving, gravity means operable on the breaking of the roving to raise the thread guide and move the trigger into engagementwith the actuator, power means operable thereafter to raise the thread guide further and to move the trigger against and beyond the actuator, and a yieldable catch on the actuator for hoiding the thread guide in raised position during rethreading.

8. In a stop-motion device for a spinning frame, the combination of a power-driven member, a trigger adapted on the breaking of a roving to move into the path of the power-driven member and to be further moved thereby, a stopping member and an actuator therefor. and cooperating engaging elements on the t igger and the actuator so positioned that in movement of the trigger by the power-driven member its engaging element moves and passes beyond the engaging element of the actuator, one of said engaging elements being yieldable in a direction to pc mit a manual return movement of the trigger.

9. A stop-motion device for a spinning frame, comprising a stopping member, an actuator therefor, a trigger normally held out of engagement with the actuator by ongagement with a roving, gravity means operable on the breaking of the roving to move the trigger into contact with the actuator, power means operable thereafter, to move the trigger against and beyond the actuator, and yieldable means on the actuator permitting a manual return movement of the trigger.

10. A stop-motion device for spinning frames, comprising a pivot, a trigger which is mounted on said pivot, engages a roving beyond the drawing rolls and is urged to tilt in one direction by the roving and in the other direction by gravity, a fined stop lim iting the tilting of the trigger by the roving, a movable stop limiting the tilting of the trigger by gravity, a cam projecting from the middle portion of the trigger and having a surface inclined to the pivot, a powerdriven member having a back and forth movement parallel to the pivot and positioned to clear the cam when the trigger rests against a fixed stop and to engage the cam when the trigger rests against the mov able stop and'to move the cam across its path, turning the trigger about its pivot, and a yieldable catch adapted to retain the trigger in the position into which it is moved by the power-driven member.

11. A stop-motion device for spinning frames comprising a stopping member, an actuator for the stopping member normally out of contact therewith, and a trigger movable by power on the breaking of a roving to engage, move and pass beyond the actuator permitting it to reassume its normal position.

12. The combination with a spinning frame having drawing rolls and a supporting bar in advance of said rolls and a table extending under said rolls, of a stop-motion device comprising stopping means secured to the supporting bar of the. frame and operable by an impact from below, an arm normally lying against the top of the table of the frame, and meansoperable on the breaking of a roving in or beyond the drawing rolls to raise said arm and cause it to strikeand operate said stopping mechanism.

13. The combination with a spinning frame having drawing rolls and a supporting bar in advance of said rolls and a table extending under said rolls, of a stop-motion device comprising stopping mechansm secured to the supporting bar of the frame and operable by an impact from below, an

rm normally lying against the table of the frame, normally inoperative power-driven mechanism for throwing said arm upward to strike and operate the stopping mechanism, and cont-rolling mechanism arranged to render said power-driven mechanism operative on the breaking of a roving in or beyond the drawing rolls.

l-it. In a stop-motion device for a spinning frame, the combination of a stopping mechanism adapted to remain in either operative or inoperative position, an actuator adapted to move the stopping mechanism from inoperative to operative position and normally out of contact therewith, and means operable on the breaking of a roving to bring the actuator momentarily into contact with the stopping mechanism.

15. The combination with a spinning frame having drawing rolls and a supporting bar in advance of said rolls and a table extending under said rolls, of a stop-motion device, comprising stopping means secured to the supporting bar, operating mechanism for said stopping means located at an outer edge of the table, and a connection between the operating mechanism and the stopping means normally lying against the table.

16. The combination with a spinning frame having drawing rolls and a supporting bar in advance of said rolls and a table extending under said rolls, of a stop-motion device comprising stopping means secured to said supporting bar of the frame, a pow er-driven member for ope-rating said stop ping means and mechanism for controlling the operation of the stopping means both located at an outer edge of the table of the frame, and a connection between the controlling mechanism and the stopping means normally lying against the table of the frame.

17. The combination with a spinning frame, of a stop motion device, comprising llt a lever having an arm-bearinga,thread,

guide and a counterbalancing arm, and pivoted above the level of a roll-beam of the,

frame and not materially inside the outer drawing roll of the frame, and means for stopping the feed of a roving operable on a tilting of sald'lever.

18. The combination with a spinning frame, of a stop motion device, comprising 1y greater than that of outer arm and terminating substantially at the outer ed 'e of a roll-beam of the frame, and means for stopping the feed of a roving operable on a tilting of said lever.

19. The combination with a spinning" frame, of a stop motion device, comprising a lever pivoted not materially inside the outer drawing roll of the frame, and having at its outer end a thread-guide for directing a roving to a spindle of the frame, a fixed stop'so located that the lever is held against it by a roving passing through its thread-guide, and mechanism operative onmovement of said lever away from said stop to stop the feed of said roving to the -drawing rolls, all parts of said mechanism being out of contact with said lever when said lever is in engagement with said step.

20. The combination with a spinningframe, of a plurality ofstop-motion units arranged alongone side of the frame and each comprising an arm pivoted on an axis near an outer edge of the table of the frame and bearing a thread guide and a stopping means operable on a turning movement of said arm about its said pivotal axis, and means for simultaneously raising all said arms about their said pivotal axes to permit dotting the spindles of the frame.

21. Controlling mechanism for a stopmotion unit, comprising a nearly balanced lever consisting of two arms independently pivoted on a common pivot, a thread guide on one arm, and cooperative engaging-means on said arms limiting simultaneous downward movement thereof while permitting the arm bearing the thread guide to be raised independently of the other arm.

22. The combination with a spinning frame of a stop-motion device, comprising power-operated stopping means and controlling mechanism therefor including a pivot located outside a roll beam of the frame, an arm extending outwardly from said pivot and having a thread guide 'at'its outer end, a counterbalancing member mounted on said pivot and extending inwardly therefrom, and cooperative engaging means on said arm and member limiting simultaneous downward movement thereof while permitting the raising of said arm independently of 'saidmember. i

23. A stop motion device having a sainning frame, comprising ,a slightly overbalanced pivoted lever, thread-guide at the outer end of said lever, a member providing a Vshaped slot under the outer arm of said lever-into which the arm is drawn bya roving passing through its thread-guide, and mechanism for stopping the feed of the roving of a tilting of said lever, all parts of said mechanism being out of contact with tie lever when the lever is in engagement with said slot.

24. The combination with a spinning frame, of a stop motion device, comprising a nearly balanced lever whose outer arm bears a thread-guide for directing a roving to a spindle of the frame, a fixed stop so located that the trigger lever is drawn into contact therewith by the roving passing through said thread-guide, and mechanism operative on movement of said trigger lever away from said stop to stop the feed of said roving to the drawing rolls, all parts of said mechanism being out of contact with said trigger lever when said trigger lever is in engagement with said stop. 1

; In a stop motion device for a spinning frame, the combination of a thread.

guide positioned to receive a roving from the drawing rolls and to direct it to a spindle,

a nearly balanced lever bearing said thread guide and heldout of contact with all other movable parts of the device by a roving passing through the thread-guide, and fixed means engaging the trigger and preventing vibration thereof while said roving is intact.

26., A stop motion device for a spinning frame, comprising a stopping member in ad- Vance of the drawing rolls of the frame, a thread-guide positioned to receive a roving directly from the drawing rolls and to direct it to a spindle of the frame, a nearly balanoed lever carrying said thread-guide, fixed means restraining the trigger against vibration, and means normally out of contact with said lever and operative on movement of the lever away from said fixed means to apply power from a mo ing partof the spinning frame to the stopping member.

27. Controlling mechanism for a stop-motion device, comprising a horizontal pivot, aslightly overbalanced lever loosely mounted thereon, a thread guide at the outer end of said lever, and a member providing a V- shaped slot below the outer arm of the lever, sothat the outer arm is drawn into said slot by the roving passing through the thread guide and restrained against vibration therey 28. stop-motion device for a spinning frame, comprising a bar slidablymounted at the outer side of one of theroll beams of the frame, means for reciprocating said bar, a projection on said bar, a trigger engaging a roving and movable into the path of said projection on the breaking of said roving, and means actuated by the bar on movement of the trigger to stop the supply of said roving to the drawing rolls of the frame.

29. A stop-motion device for a spinning frame, comprising a bar slidably mounted at the outer side of one of the roll beams of the frame, means for reciprocating said bar, a projection on said bar, a trigger pivoted near the outer edge of said roll beam and engaging a roving, a cam on said trigger movable into the path of said projection on the breaking of said roving, and means actuated by movement imparted to the cam by said projection to stop the supply of said roving to the drawing rolls of the frame.

30. A stopsmotion device for a spinning frame, comprising a pivot, a trigger which is mounted on said pivot, engages a roving beyond the drawing rolls, and is urged to tilt in one direction by the roving and in the other direction by gravity, a fixed stop limiting the tilting of the trigger by the roving, a movable stop limiting the tilting of the trigger by gravity, a cam projecting from the middle portion of the trigger and having a surface inclined to the pivot, a power-driven member having a back and forth movement parallel to the pivot and positioned to clear the cam when the trigger rests against the fiXed stop and to engage the cam when the trigger rests against the movable stop and to move the cam across its path, turning the trigger about its pivot, and forcing it to move said movable stop, and means actuated by such movement of the movable stop to stop the feeding of said roving to the drawing rolls.

31. In a stop-motion device for a spinning frame, the combination of a fixed pivot, a trigger mounted on said pivot, a cam pro jecting from the middle part of the trigger, and having a surface inclined to the pivot, a reciprocatory slide bar parallel to the pivot, and a projection on said slide bar adapted to engage said cam and move it across its path, thereby turning the trigger about the pivot.

The combination with a spinning frame, of a stop-motion device having a power-driven member, a driving connection between a moving part of the frame and said power-driven member, a clutch in said connection, neans actuated by the shifter rod of the frame to open the clutch when the shifter rod is moved to stop the mechanism of the frame, and manually operable means for closing said clutch after the shifter rod has been returned to running position.

33. The combination with a spinning frame, of a cross-shaft at one end of the frame connected with the main driving shaft of the frame, a cam at each end of said cross shaft, a slide bar at each side of the frame, a cam-follower on each slide bar,

springs retaining said cam-followers in engagcment with said cams, and stop-motion units located along the sides of the frame and operable by movements imparted to said slide bars by said cams.

34;. The combination with a spinning frame, of a cross-shaft at one end of the frame connected with the main driving shaft of the frame, a cam at each end of said cross-shaft, a slide bar at each side of the frame, a spring tending to urge one of said bars toward the cross-shaft, a cam-follower on said bar engaging the inner side of one of the cams on the cross-shaft, a spring urging the other bar away from the cross shaft, a cam-follower on said bar engaging the outer side of one of the cams on the cross-shaft, and stop-motion units of identical construction located along opposite sides of the frame and operable by movements imparted to said slide bars by said cams.

In a stop-motion device, mechanism for stopping the feed of a roving, comprising a vertically movable plunger, a stop limiting downward movement of said plunger, a shaft rotatably mounted above the roving, a crank on said shaft, and a clamping member eccentrically mounted on said shaft so that its surface is out of contact with the roving when the crank rests on the plunger and moves into contact with the roving when the crank is turned upwardly by the plunger.

In a stop-motion device, mechanism for stopping the feed of a roving, comprising a box-like housing, a clamping member journalled in the sides of said housing, an opening between one side and the bottom of said housing to permit the insertion roving between the bottom of the housing and the clamping member, and means for guiding a roving into said opening.-

37. The combination with a spinning frame, of a stop motion device, coin nising a lever pivoted at a point not materially in side the outer drawing roll of the frame, and having an outer arm bearing a threadguide for directing a roving to a spindle of the frame, and a short inner counterbalancing arm terminating substantially at the outer edge of a roll-beam of the frame, means for stopping the feed of a roving operable on a tilting of said lever, means for til adjusting the length of the arm bearing the thread-guide, and a plurality of weights d-etachably secured to the counter-balancing arm.

38. In a stop-motion device for a spinning frame, the combination of a plurality of housings secured along the outer edge of one of the roll beams of the frame, a trigger lever pivoteu in each of said housings, and a power-driven slide bar cooperating with said triggers and passing through aligned openings in the housings.

39. In a stop-motion device for a spinning frame, the combination of pivoted thread guides above the spindles of the frame, a power-driven slide bar located outside a roll beam of the frame, a bar for raising the thread guides, and hinged brackets connecting the bar with the roll beam of the frame formed to arch over the slide bar.

lO. The combination with a spinning frame, of a stop motion device, including a pivoted roving-engaging trigger lever located wholly in front of a roll-beam of the frame.

ll. The combination with a spinning frame, of a stop motion device, including a pivoted roving-engaging lever located wholly in front of a roll-beam of the frame,

and a fixed stop against which said lever is held by a loving.

42. The combination with a spinning frame, of a stop motion device, including a pivoted roving-engaging lever located in front of a roll-beam of the frame, and a fixed stop against which said lever is held by a roving. and mechanism operative on movement of-said trigger lever away from said stop to stop the feed of said roving to the drawing rolls, all parts of said mechanism being out of contact with said trigger lever when the lever is in engagement with said stop.

L3. The combination with a spinning frame, of a stop motion device, including a bracket extending outward from the front of a roll-beam of the spinning frame, a trigger lever pivoted on said bracket, and having an outer arm extending over a spindle of the spinning frame, and an inner arm terminating substantially at the outer side of the roll beam.

In testimony whereof we have hereunto set our hands.

JOHN P. GAREY. LOUIS B. HASBROUGK.