US2009350A - Brake mechanism for bobbin strippers - Google Patents

Description

July 23, 1935. E. A. TERRELL 2,009,350

BRAKE MECHANISM FOR BOBBIN STRIPPERS Filed sept- 14, 1931 4 sneetsfsneet 1 July 23, 1935. E. A. TERRELL BRAKE MECHANISM FOR B OBB-IN STRIPPERS Filed Sept. 14, 1931 4 Sheets-Sheet 2 Z @MM2/w. ad

BRAKE MECHANISM FOR BOBBIN STRIPPERS July 23, 1935. E. A. TERRELL 2,009,350

BRAKE MECHANI'SM FOR BOBBIN STRIPPEBS FiledSept. 14, 1931 4 Sheets-Sheet 4 Patented `Iuly 23, 1935 nBRAKE MECHANISM FOR :'BOBBIN STRIPPERS Edgar A. TerrelLCharlotte, N. C., as'signor'to The ATerrell Machine "Company, Charlotte, N. C., a corporation of North Carolina.

Application September 14, 1931, Serial No.562,637

17 claims.

The .invention relates .to :bobbin cleaners, and especially to machines .of :the general'zcharacter disclosedin any'UnitedrStates Patent No. 1,451,239, dated April v1i), `1923; .and :it .consists V.principally in novel :and improved means `for .bringing the imachine tquickly to rest. Breierably .such stopping means .is .under .control .of :the :cover-:lid of .the machine, .acting .automatically .when :the lid .is raised to discontinue `.the driving of the machine and to vappiy .a brake, :so .that :the machine is stopped without .appreciable .'delay, thus .avoiding possibility for injury Ito Lthe. .operative by contac with moving parts Within .the casing.

In machines of the class referred lto, intended i especially for l:cleaning roving .'bobbins, Ethepleaning mechanism Iis enclosed .in .a casi-ng .having a movable cover, .and includes .ya .rotary drum -.or belt covered l.with card-clothing .to remove waste yarn .from .the fbobbins, which .are fed :to it by .'-a conveyor. .The coverhas to .beraised at .inter-.vals for inspection, removal .or .repositioning Lof :misplaced bobbins, cleaning, zor :for other purposes; if `atsuch times lthemachineis being driven, .or continues to .run by momentum alter .the cover is `raised sufficiently .to give .access :to .the `enclosed mechanism, l.there is .some risk -of injury to the operative by Contact oi Fhishandsor .clothing kwith moving `lparts, and .especially .with the .card-.clothing of the rcleaning drumcr belt. The .invention structure prevents .such iinjury :by `discontinuing application .of .driving power'andgapplying -a brake which promptly :brings .the itoothed .drum or belt, and other parts, "to rest beforethe .cover is raised far enough .to permit access of the operatives hand 'to-such parts of the machine.,

taneously to the `roll or belt.

Provision 'is made" for adapting the essential features of the invention to different driving means or arrangements, including'belt drive from a counter-shaft and individual 'motor-drive.

In the drawings:

Fig. lis aside elevation of a machine embodying the Ainvention in one form.

`Fig.'2 is a-side elevation showing principally -the drive and brake controlling means, vwith other parts omitted.

Fig. 3.isa i'top plan of vcertain portions of Fig. 2

with :parts broken away.

'.11 is :a .section at l, f4, Fig. 2, enlarged. flh'g. '5 is .asection at S5, 5, Fig. 2, enlarged.

Fig. 6 is a detail -in bottom plan View -of 'the brake -lever vsupport yof Fig. 2. Fig. .7 is a side elevation-of a modication pro# viding :for individualfmotor drive. Fig. -8 -is aside-elevation of principal parts `of. the .drive.controllingjbrake and brake controlling mechanism of Fig. 7, withother parts omitted.

Fig. 9 vis airight side elevation of Figu8. r i Fig. Alil is aleft -sideelevation o f ,principalparts of the controlling means, with otherparts omitted. Fig. 1l is a detail view of thefbrake shoe fulcrum mounting. Y

Fig. misa-section at 2, i12, Fig. 11. y In cleaning machines of theclass contemplated, as disclosed in -the abovepatent Vand lalsosufiiciently shown injthe -present-drawings, the clean# ing mechanism, including a roll or belt faced with card-clothing .and a bobbin-feeder -or conveyor, is .enclosed .in a casing i vWhich-is vsupported on a lint-collecting bo-X'or chamber vIl into-Which Waste or `lintrernoved from the ,bobbins iswdischarged by a'blower. The casing i has a Ycover 1 yhingedly. connected at fl il. Thel ends of-belts I3 4which hold bobbins .against the cleaning roll whenithecover is closed, rareconnectedto the'cover at vthe .outside thereof Aby v,tensioning-springs i5. The cover has at its :free edge a weight-bar yI9 to hold, or assist .1in holding, it in closed position.

The-machine asshovvn in Figs. f1 to A6;.is,

ranged for driving by a belt/22 from a countermounted lonthe shaft, outside theiastpulley. A

controlling lever 1149 having -a handle 52 lis-fulcrumed at 55 one framefbracket 5B, andicarries afork'l onshifting the belty '-Io 4stop the cleaner mechanism :promptly after driving 'is ldiscontinued by 4shifting the belt :to loose -pulley4.6, brake .mechanism `is provided, ``in'` cludingga brake-arm xGil pivotally mounted cna' stud 61 carried by a. :lug 1:0 on or supported by guard :3.1. The arm hasV anarcuate shoe-:portion provided `with a liner 13 .to cooperate `with the r brake-drum, or 'braking surface H3 of 'the' fast pulley. YA `portion lof 4arm 16'4 iextends' AthroughV a slot 216 inguard3i, and Eisconnecte'd -bya 'link 19 to one end of a brake'-operating lever 82, Aiulcrumed'fat F85 in -a lug '88 secured 'to guard '3L Lever 82 provides for multiplying the pressure applied to brake-shoe 64 which is desirable because of the moderate diameter of the brakedrum, in the arrangement shown. To properly position the brake shoe, or its liner 13, in relation to the drum, with clearance when in oif position, (Fig. 1 or 2), link 'I9 is made adjustable as by means of nuts 94 on its threaded upper end, engaging at opposite faces of the arm-end 91.

The action of the belt-shipper lever 49 and of brake-lever 82 are controlled by a stop-lever |00 fulcrumed on a stud |03 secured in a boss |06 on guard 3 I. The lower arm |09 of this lever has at its lower end a flat cam-member H2, Fig. 4,

ing upward at a divergent angle to the general' direction of cam-face ||5. The cam-face II 8 is engaged by a cam-roll |2I mounted on a pin |24 between lugs |21 near the power-end of lever 82. This end of the lever is forked, as shown best in Fig. 5, providing lugs or flanges |30Y located at opposite sides of the upright portion of bracket 58 above-mentioned to guide the lever-end and relieve it and its pivot-mounting from strains or distortion due to laterally-acting forces and especially lateral pressure caused by engagement of roll I2| with cam-face H8. The power end of lever 82 is urged upward by a spring |33 connected at one end to a stud or screw |36 in one of the lugs |30 and at the other to the end of fulcrum stud |03, and this spring |33 Yprovides the force which shifts the controlling lever 49 to put the belt on the loose pulley and which applies the brake.

The upper arm |39 of stop-lever |00 terminates in a toe or contact-face |42 (see also Fig. 10) which normally engages the outward face of a lever-detent or-cam I 45 secured to the casingcover 'I near its free edge. As shown, this detent is in the form of a circular disk having an eccentric hole |48 tting on a rod |5| projecting from the weight-strip I9 at the free transverse cover edge, and secured in angularly-adjusted position on the rod by a set-screw |54. Such angular adjustment provides for regulating the point in upward movement of the cover at which the stoplever will be released; also by moving the cam or detent axially on rod |5|,'the normal or running position of the lower end of lever |00 and of its cam-member ||2 may-be controlled.

In normal operation, with the parts in the positions shown in Figs. l, 2 and 4, the casing-cover is closed; the toe |42 of stop-lever |00 is in engagement with the outerv face of detent-cam |45y nearl an edge thereof; the power end of brakelcver 82 is urged upward by spring |33 and its cam-rollbears against the diagonal cam-face I8 of the detent-lever, urging the lower end of that lever outward (or toward the left, as viewed in Fig. 4) the detent-lever is prevented from moving in the stated direction by engagement of its toe |42 with the detent-cam, and the brake-'lever 82 is thus maintained in depressed, brake-releasing position, the link 'I9 supporting the free end of the brake-arm 64 so that the brake-liner '|3 is free ofbrake-drum 43. VIn the stated position of stop-lever |00, its cam-face I I5 confronting the controlling or belt-shifting lever 49 is in lnormal retracted position permitting this shifting lever to be in running position; thatris, fork 6I controlling belt 22 is positioned to hold the belt on the vfast pulley 40. The cleaning mechanism is thus being driven by belt 22 through the fast pulley connected to the drum shaft, and through gear 25 which drives other parts.

When the cover I is raised, for any of the ptuposes referred to, in the iirst short upward movement of its free edge, detent-cam |45 is Withdrawn from the toe or `detent-face |42 of lever 00 which is instantly rocked clockwise as viewed in Fig. 4 on its fulcrum'l3 by the pressure of cam-roll |2| acting on cam-face IIB under urgency of spring |33; cam-face ||5 is thus moved outward, or to the left in Fig. 4, and acts on the controlling or shifting lever to move its fork 6| and thereby to move the belt 22 to the loose pulley 46, discontinuing driving of the cleaning mechanism; immediately thereafter the continued movement of brake-lever 82 on its fulcrurn 85 acts through link 'i9 to pull down the end of brake-arm 54 and apply the brake-liner T3 to braking surface 43 and. promptly bring all moving parts of the cleaning mechanism to rest. This occurs before the cover can be raised far enough to give access to enclosed parts, and when the cover is fully opened inspection, adjustment, or other operations may be effected without risk of injury. Also, the machine will be automatically stopped through raising of the cover when two or more bobbinsattempt to enter the machine at once, with attendant danger of injury to the bobbins and 'to the machine parts.

After a stopping action the upper end of lever |00 is positioned below (that is, in the plane of) the detent-cam |45. In the proper mode of operation, before the machine is restarted by manipulation of lever 49, the cover is moved to nearly closed position, whereupon the edge of camv |45 engages the upper end of the stop-lever (or of its toe |42). The cover is then so nearly closed that access to parts within the casing is prevented. Lever-handle 52 is then moved in a direction to shift the belt back to the fast pulley; before the belt is so shifted, lever 49 acting on cam-face II5 moves the lower end of this stoplever inward (toward the machine, or to the right, in Fig. 4), and diagonal cam-face I8 acts. on roll |2| to move it and the power end of the brake-lever downward; brake-arm 64 is thus raised, releasing andr clearing brake-liner 13 from drum 43; and thereafter continued movement of controlling lever 49 completes the movement of belt-shifter 6I, bringing the belt to driving position on the fast pulley.

The upper end or toe |42 of stop-lever |00 has in the stated movements been withdrawn from under the edge of the detent-cam, whereupon the cover drops t0 fully closed position, and the outer face of the cam is again opposed to the contact-face of lever-toe |42 to maintain all parts in normal running position until the cover is against raised. 'v

Lever 49 may be moved to shift the belt and stop the machine, at any time, although if the cover lremains closed when this is done, the brake is maintained in off7 or inactive position and there is no braking action.

A stop may be provided such as a pin |54 set in bracket 58, to engage lever 49 and limit movement of the lever in the stopping direction, or at least to prevent over-stroke of the lever which might otherwise throw the belt outwardly off of the loose pulley. A spring |57 is desirably placed about the lever fulcruzn screw or stud 55, bearing against the lever or a washer 55, to frictionally resistor control the lever movement, through cover giving access to thestrippingvmechanism when opened, a drive-shaft for the stripping mechanism, means for driving the shaft, a brakedrum on the shaft, a drive-controlling member, abraking member to apply braking force to the drum, means urging the drive-controlling member to non-driving position and the braking member to braking position, and a detenty cooperating with the cover only when in closed position to maintain the drive-controlling member in driving position and the braking member in non-braking position. Y Y

9.*A bobbin-stripping f machinel comprising stripping mechanism, a casing having a Vmovable cover giving access to the stripping mechanism when opened, driving means, a brake, a part on the cover to act as a, detent, and a cooperating detent member normally maintaining the driving means in driving position andthe brake yin-of position, the detents being operatively combined to unship the power and apply the brake when carried out of coengagement through movement initiated by therlifting of the cover.V

10. A bobbin-stripping machine comprising stripping mechanism, a casing having a movable cover giving access to the stripping mechanism when opened, a drive-shaft for the stripping mechanism, a fast pulley, loose pulley and brakedrum on the shaft, a belt, a'belt-shifter, a brake cooperating with the brake-drum, means cooperating with the cover only when closed, to maintain the shifter in driving position and the brake in off position, and means tending constantly to shift, the belt to the' loose pulley and apply the brake.

l1. A bobbin-stripping machine comprising stripping mechanism, a casing having a movable cover giving access to the stripping mechanism when" opened, a drive-shaftl for the stripping mechanism, a brake-drum on the shaft,a motor connected to drive thev shaft, a vmotor-controller, a brake cooperating with thedrum, means urging the motor-controller to off position and the braketo braking position, and means movable in apath intercepted by a part on the cover when closed and thus normally maintaining the motorcontroller in driving position and the brake in olf position.

12. A bobbin-cleaner comprising a casing having a movable cover, cleaning mechanism Within the casing, driving means therefor, drive-controlling means, braking means for said mechanism, and means engaging with the cover only when the latter is closed and acting upon an opening movement of said cover to operate said drive-controlling and braking means to bring said mechanism to rest.

13. A bobbin-cleaner comprising a casing having a movable cover, cleaning mechanism Within the casing, driving means therefor, drive-controlling means, a brake, and means normally held inactive through engagement with the cover when the cover is in closed position and acting when the cover is moved toward open position and out of engagement therewith to interrupt driving and apply the brake to bring said mechanism to rest.

14. A bobbin-stripping machine comprising stripping mechanism, a casing having a movable cover giving access to the stripping mechanism when opened, driving means, a brake, a detent cam on the cover, and a detent lever cooperating with the'cam to unship the driving means and apply the brake. f Y

15. A bobbin-stripping machine comprising stripping mechanism, a casing having a movable cover giving access to the stripping mechanism when opened, drive-controlling means, a brake, a. detent on the cover, and a controlling member cooperating with the detent and the drive-controlling means and brake to normally maintain the drive-controlling means in driving position and the brakeA in off position, the detent being carried by cover movement out of cooperating relation with the controlling member, whereby the driving is suspended and the brake applied.

16. A bobbin-stripping machine comprising stripping mechanism, a casing having a movable cover giving access to the stripping mechanism when opened, driving means, a brake, a detent cam on the cover, a detent lever engaging the cam when the cover is closed and controlling the operation of the driving means and brake, and means normally urging the detent lever in a direction to discontinue driving and apply the brake, and effective to do so when the movement of the vcover separates the cam from the lever.

17. A bobbin-stripping machine comprising stripping mechanism, a casing having a movable cover giving access to the stripping mechanism when opened, a drive-shaft for the stripping mechanism, a fast pulley, a loose pulley and a brake-drum on the shaft, a belt, a belt-shifter, a'brake cooperating with the drake-drum, means urging the shifter to non-driving position and the brake to braking position, and means cooperating with the cover only when shut, to maintain the shifter in driving position and the brake in off position'. A

' EDGAR A. IERRELL.

CERTEFCA'E GE? CRRECTGN Patent Nv. 2,009,350. Juy 23, 1935.

EDGAR A. TERRELL.

it is hereby cetied that arma appears in the primed specification @i the above mambred Datemi requirng carre-:tima as follows; Page 3, secend coiumn,

line 67, claim l?, strike out tte word "preisposed" and insert the same before "means" second occufrence n same Bine and claim; and that the said Latters Patent should be read with this correcrmt therein that the same may conform to the record of the case in the Patent Office.

Signed and seated this Mtb day of September, A. D. 1935.

Leslie Frazer (Seal) Acting Commissioner of Patents.

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