US2257654A - Stop motion - Google Patents

Description

' ept. 30, 1941. o. w. SCHAUM 2,257,654

STOP MOT'ION Filed J1me 11, 1940 s Sheets-Sheet 1 Sept 30, 1941. Q SCHAUM 2,257,654

STOP MOTION Filed June 11, 1940 s Sheets-Sheet 2 Sept. 30, 1941. o. w. scHAuM STOP MOTION Sheets-Sheet Z I Filed June 11, 1940 Patented Sept. 30, 1941 UNITED STATES; PATE T OFF-ICE STOP MOTION Otto W. Schaum, Philadelphia, Pa., assignor to Fletcher Works, Incorporated, Philadelphia, Pa., a corporation, of Pennsylvania Application June 11, 1940, Serial No. 339,958 9 Claims. (!..57-82) This invention relates to stop motions for apparatus handling textile ends, i. e. single filaments, or threads, yarns, cords, etc. composed of a plurality of such filaments or strands.

The device constituting the subject matter of the present invention is particularly designed for use in spinning, twisting, and doubling machines, and especially for use in a machine of the type disclosed in the prior United ,States Letters Patent No. 1,471,292 issued to Karl Sloat, under date of October 16, 1923.

The object of the present invention is to simplify the construction of the stop motion; and to quicken its action between the instant of detection of a broken end or excessive slackness in an end and the actual moment of stopping the twisting spindle and feed rolls which are handling the affected end, or which are handling a plurality of ends, includingthe affected end, being twisted together and wound on a spool, bobbin, cone orother package mounted on an rotated by the spindle.

The construction'and operation of the device of the present invention, which is an improvement on the stop motion disclosed in said patent, will be fully disclosed hereinafter, reference being had to the accompanying drawings, of which:

Fig. 1 is a vertical transverse section of one side of a twisting and winding machine of the type disclosed in the Sloat patent supra, with the improvements of the present invention incorporated therein;

Fig. 2 is an enlarged view of the end detecting and stopmotion tripping unit shown in Fig. 1, and disclosing the improved device of the present invention in side elevation, with the elements thereof in normal running positions relative to each other;

,Fig. 3 is a plan view of the device shown in Fig. 2';

Fig. 4 is a view similar to Fig. 2 but showing the elements in the act of detecting a broken or slack end and triggering the spring loaded release rod for the feed rolls and twisting spindle; 5 is a fragmentary plan view of the release rod with its retaining catch and trigger after releas'e of the catch by operation of the trigger;

Fig. 6 is a sectional elevation line 66, Fig. 2;

Fig. 7 is a sectional elevation taken on the line 'l--|, Fig. 6; and

Fig. 8 is a detached perspective View of one 9f the taller-Wires.

The machine includes a plurality of transverse taken on the frames one of which isindicated at I. These frames arespaced apart along the length of the machine and connected by longitudinal angle or other bars or beams 3, 4, 5 and 6.

The beam3 supports a number of laterally spaced twisting or other filament handling units one of which is indicated at l0. *Each unit In includes'a spindle H, for rotatably supporting a Spool or other package foundation I2, and each spindle H is rotatably mounted in a swingbracket I3, which is pivotally mounted on a fixed bracket l4 secured tothe beam 3. Each spi idle i I is provided with a drive pulley 115 which is adapted to be normallyheld in contact with a drive belt It, by a spring H, to rotate the spindle and package carried thereby. The spring ll tends at all times to swing the bracket 13 in a clockwise direction, as viewed from above, relative to the fixed bracket I4; to hold the drive pulley l5in operative engagement with the drive belt I6. r

Each beam 4 carries a series of end feeding units 20, one for each handling unit llLand each of said feeding units includes a pair of rolls or drums 2|, 2! which are-rotatably mounted in a swing-bracket 22. The bracket 22 is "pivoted to a fixed bracket 23 secured to the beam 4, Each pair of rolls 2|, 2! are geared together to rotate in the same direction at the same speed. One roll is provided with a beveled gear 24 which normally meshes with a driving gear 25 on a constantly rotating horizontal drive shaft 26. The gear 24 is normally held in intermeshing engagement with the gear 25 by a spring 21. The spring 21 normally tends to swing the bracket 22 about its pivot in a counter-clockwise direction relative to the fixed bracket 23, to retain said engagement.

The foregoing structure is shown and described in detail in the above noted patent.

" The beam '5 supports a series of detecting and triggering units 30. It is the individual units of this series to which the present invention is directed. Each unit includes a bracket 31 which is secured to the beam 5 by bolts 32. Each bracket 3| is provided with a pair of vertically extending laterally spaced posts 33, 33 which are slotted at their upper ends to receive reduced ends of a horizontal faller-wire pivot rod 34. Rockably mounted on the pivot rod 34, between the posts 33, 33, is a series of faller- wire units 35, 35. Each unit 35 (see Fig. '8) includes a bell-crank lever 36. One arm 31 of the lever 36 is provided with a socket 38 for receiving and removably supporting the U-shaped bent lower end 39 of a faller-wire 40. Each fallerwire 46 in each instance carries a quick-thread- 1 .ing porcelain thread guide or open eye 4! at its 7 upper end.

The faller-wires 49 are normally maintained in vertical position, with the body portions of the wires lying below said eyes in contact with a horizontal limit bar 42, by tension of textile threads or ends as, :c which pass through the guides 4|, 4| respectively, then part way around a horizontal bar 43, from which said ends extend to a single common guide eye 44 carried by the swing-bracket 22 of the feedingunit 29. The threads :0, :c are assembled in close parallel re lationship by passage through the eye 44 and then pass from the assembling eye to and around tria e-5i E3 of the twisting unit H), for the purpose of swinging the bracket in counter-clockwise direction consequently moving the driving pulley of the spindle H away from the driving belt l6, when the shaft 66 is rotated in a counter-clockwise direction.

Intermediate its ends the shaft 60 is provided with a second cam 65 which bears against the swing-bracket 22 of the feeding unit 26, to swing said bracket in a clockwise direction and consequently move the gear 24 out of mesh with the 1 drive gear25, when the actuating shaft 69 is the feed drums 2|, 2| and thence to aflyer or ring-traveler 45 of the twisting and winding unit I 0, as noted in said patent.

Rotation of the drums 2|,2l draws the ends .r, :r from supply spools, bobbins, or other packages 50 which ar mounted on a creel 49. The creel 49 is supported by the longitudinal bars 6, 6. The rolls 2 I, 2| feed the group of ends concurrently at a predetermined rate of speed to th flyer 45 which travels on a ring or track 46 around the package foundation l 2 on the spindle H while said spindle is rotating at a predetermined rate of speed, whereby the several ends are twisted together and wound on the package foundation I2.

The tracks or rings 46 are raised and lowered with respect to the package foundation I2 by rise and fall of the bar 2 to which the supports 4'! for the rings 46 are secured, whereby the twisted threads are laid in spiral convolutions back and forth on the package foundation [2. 7

Each faller-wire lever 36 is provided with a rearwardly extending toe 5!, which forms the second arm of th bell-crank lever 36. The toes 5|, 5| of the laterally adjacent series of fallerwire units 35, 35 overli a bar 52 which extends parallel to the axis of the pivot rod 34 on which the levers 36, 36 are rockably mounted. The bar 52 is secured to the outer end and forms a part of a substantially balanced trigger finger 53. The trigger finger 53 is pivotally mounted at 54 ina trigger lever 55, which, in turn, is pivotally mounted on a spindle 56 having its opposite ends respectively secured in lugs 51, 51, projecting upwardly from the bracket 3!. The substantially balanced trigger finger 53 includes a rearw'ardly extending heavier portion 59 which, as shown in Fig. '7, slightly overloalances the forward end portion 52 of the trigger finger, causing said finger to rest normally on a lug 85 forming part of the trigger lever 55. r I

The trigger lever 55 includes a lug 59 which constitutes the trigger proper. Thetrigger 59, as shown in Fig. 3, is normally pressed into a notch 64 formed in a catch element 62 which is secured to the upper end of the feed roll and twisting spindle release shaft 66. The trigger 59 .is held in the notch 6! by a spring 63 which encircles the pivot spindle 56, with one end of the spring bearing against the bracket 3| and the opposite end bearing against the trigger lever 55, as clearly shown in Fig. 2.

The release shaft '36 extends downwardly from. the detecting unit 36, to the feeding unit 20 and twisting unit 16, as clearly shown in Fig. .1, said shaft having bearing in each of the brackets E4, 23 and 31. H 7

At itslower end the shaft 69 is provided with a cam 64 which bears against the swing-bracket moved in a counter-clockwise direction.

'The counter-clockwise movement of the release shaft 60 is effected by a spring 66 which encircles said shaft, with one end of the spring engaging a lug 6'! on a collar 68 which is secured to said shaft, while the opposite end of said spring bears against the bracket 3!.

In setting the stop motion, the release shaft is adapted to be turned in a clockwise direction by a handle 82 on the collar 68, until the catch 62 on the upper end of the shaft 60 moves from. its tripped or free position shown in Fig. 5 to its .cocked position shown in Fig. 3.

Turning of the shaft 66 in this manner winds up the spring 66, thereby loading the shaft 56 and its retaining catch 62 to react to release the feed rolls 2! and twisting spindle H upon tripping of the trigger 59. The trigger lever 55-is rocked by its spring 63 until the trigger 59 rests within the notch 6!. in the catch 62, thereby holding the shaft 66 against said counter-clockwise movement.

Release of the trigger 59 is effected when one or more of the ends x breaks or becomes abnormally slack, either of which will permit the faller-wire 46 associated with such broken or slack thread to rock backwardly, from the position shown in full lines in Fig. 2 to the position shown in broken lines in said figure, under the impetus of the rearwardly projecting toe 5| of the faller-wire lever so affected.v Dropping of the toe 5i into its broken line position, Fig. 2, causes said toe to engage the forward end 52 of the trigger finger 53, moving said trigger finger from its full line position to its broken line position, as shown in Fig. 2, and raising the rear end 58 of the trigger finger from. its full line position a into its broken line position b, where the rear end of said trigger finger lies in the arcuate path of the head portion 69 of a continuously oscillating trip finger 76.

The trip fingers 16 are secured to a horizontal shaft ll mounted in bearings 1'2 which aresecured to the frame members I. Also secured to the trip shaft H is a lever 73 to which the upper end of a reach rod 14 is pivotally connected at 75. The lower end of the reach rod 14 is secured to an eccentric strap 76 which encircles an eccentric 11 secured to the constantly rotating drive shaft 26 for the feeding units 20. r

Each finger l0 oscillates at a relatively high rate of speed in a plane extending transversely of the machine coincident with the plane in which the rear end 58 of the trigger 'finger 53 normally lies and rocks from its normal position a to its high position b.

When the rear portion 53 of any one of the trigger fingers 53 is raised from its normal low position a to position b, as a result of its being overbalanced by the fall of one of the falter-wires 49 onto its forward portion 52, it is immediately engaged by its associated trip finger 16 moving from its innermost position a! to its other ex- ,asteti treme outer positiont I. The trip finger Ion-loves the trigger finger 53 outwardly in the direction of its lengthc and in so doing rocks the trigger lever-.55 about its pivot56untilthe trigger 59 is disengaged from the notch 6| in the. spring loadedcatch 62, whereupon the spring 66 immediately rotates the release shaft 50 in a counterclockwise direction' .and through the cams 64 and65:disengages the drive pulley I of the spindie .I I from the drive belt I6 and the driving. gear 24. of the feed rollsill, .2I from the drive gear 25, thereby stopping thedrawing of the ends :cfrom the supplies 50 and the feeding of the assembled ends to the twisting and winding unit I 0.

As shown in the above noted patent, move-- ment of the drive pulley I5 out of engagement with the drive belt I6 causes said drive pulley to engage a fixed brake which immediately stops rotation of the spindle I I.

After the broken end has been retied, the faller-wire associated therewith, and which has effected operation of the stop motion in its detection of the broken end, is returned to its normal running position and the repaired end is passed into the guide e-ye ll. The trigger finger 53 returns to its normal position a, after which the stop motion may be reset to return the spindle II, and feed rolls 2|, 2| to their operative positions respectively, by actuation of the setting handle 82 on the shaft 60.

Manual tripping of the stop motion may be effected at any time by rocking the trigger lever 55 and thereby release the catch 62, by pressing a finger lever 85 which forms part of the trigger lever 55 and which projects forwardly into a convenient position below the drop- wire units 35, 35.

With the above construction the working clearances between the trip fingers and the trigger fingers, and the requisite travel of the trip fingers may be reduced to a minimum, thereby quickening the action of the stop motion.

Furthermore, pivotal movement of the trip fingers, trigger fingers and faller-wires in planes transversely of the machine eliminates all sliding reciprocatory motion of the parts. With all moving parts partaking solely of pivotal movement, wear on the parts is reduced to a minimum and the undesirable vibrations attending the longitudinal reciprocations of the trip rod, trigger fingers, etc. of the stop motion disclosed in the above noted patent, are effectively eliminated.

I claim:

1. A stop motion comprising a faller-wire rockable in one plane, a trip finger rockable in a parallel plane, an intermediate trigger finger rockable in the latter plane into the path of movement of said trip finger by said taller-wire, a rockable trigger controlled by said trigger finger, and a rotary spring loaded retaining catch normally held in cocked position by said trigger.

2. A stop motion comprising a faller-wire rockable in one plane, a trip finger rockable in a parallel plane, an intermediate trigger finger rockable in said latter plane into the path of said trip finger by said taller-wire, a trigger lever pivotally supporting said trigger finger and rockable about an axis parallel to the axes of said fin- I gers and said faller-wire, a trigger on said lever, and a rotary spring-loaded retaining catch normally held in cocked position by said trigger.

3. A stop motion comprising a taller-wire rockable in one plane, a trip finger rockable in a parallel plane, an intermediate trigger finger rockable in said latter plane into the path of said trip finger by saidfaller-wire, a trigger lever pivotally supporting said trigger finger and rockable about an axis parallel to the axes of said f ngers and saidfaller-wire, a trigger on said lever, a rotary spring-loaded retaining catch normally held in cocked position by said trigger, and resilient meansfor rocking said lever to effect holding ena parallelplane; an intermediate trigger finger rockable .insaid latter plane into thepath of said trip finger by said faller-wire, a trigger lever pivotally supporting said trigger finger and rockable about an axis parallel to the axes of said fingers and said faller-wire, a trigger on said lever, a rotary spring-loaded retaining catch normally held in cocked position by said trigger, and means for continuously oscillating said trip finger.

5. A stop motion comprisinga series of fallerwires independently rockable in adjacent parallel planes respectively, a trip finger rockable in a corresponding parallel plane, an intermediate trigger finger including one portion rockable in said latter plane into the path of said trip finger and a portion extending across the planes of said faller-wires for engagement thereby, a rockable trigger operable by said trigger finger, and a rotary spring loaded retaining catch normally held in cocked position by said trigger.

6. A stop motion comprising a series of fallerwires independently rockable in adjacent parallel planes respectively, a trip finger rockable in a corresponding parallel plane, an intermediate trigger finger including one portion rockable in said latter plane into the path of said trip finger and a portion extending across the planes of said faller-wires for engagement thereby, a rockable trigger operable by said trigger finger, a pivoted I trigger lever carrying said trigger and pivotally supporting said trigger finger, a rotary spring loaded retaining catch normally held in cocked position by said trigger, and a spring rocking said lever and holding said trigger in retaining contact with said catch.

7. A stop motion comprising a series of fallerwires independently rockable in adjacent parallel planes respectively, a trip finger rockable in a corresponding parallel plane, an intermediate trigger finger including one portion rockable in said latter plane into the path of said trip finger and a portion extending across the planes of said taller-wires for engagement thereby, a rockable trigger operable by said trigger finger, a pivoted trigger lever carrying said trigger and pivotally supporting said trigger finger, a rotary spring loaded retaining catch normally held in cocked position by said trigger, and a spring rocking said lever and holding said trigger in retaining contact with said catch, the pivot axes of said taller-wires, trigger finger, trip finger, and

said trigger lever being arranged in parallel relation.

8. In a machine of the type described, comprising a twisting unit, constantly operating drive means therefor, means normally maintaining said twisting unit in operative relation to its said drive means, a feeding unit, constantly operating drive means for said feeding unit, means normally maintaining said feeding unit in operative relation to its said driving means, a shaft, means on said shaft for disengaging said twists ing and feeding units from their respective driving means, a spring tending to turn said shaft trigger, an oscillating trip finger for operating said trigger finger to effect release of said catch,

pivoted faller-wires for actuating said pivoted trigger finger into the path of oscillation of said trip finger, and means operatively connecting said oscillating trip finger with one of said constantly operating drive means for constant oscillation thereby, said fingers and trigger being by said triggers respectively.

operable :about their respective pivotal axes in planes transverseto said machine. J

trigger fingers, and pivoted trip fingers engage- -ablewith said trigger fingers to operate'said triggers, all operable in parallel planes extending transversely of the machine to which said stop 10 motion isfapplied, and rotary spring loaded retaining catches normally held in cocked positions OTTO W. SCHAUM

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