US1766753A

US1766753A - Yieldable bobbin support for weft-replenishing looms

Info

Publication number: US1766753A
Application number: US323342A
Authority: US
Inventors: William H King
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1928-12-03
Filing date: 1928-12-03
Publication date: 1930-06-24
Anticipated expiration: 1947-06-24

Description

June 24,1930- w. H. KING 1,766,753

YIELDABLE BOBBIN SUPPORT FOR EFT REPLENISHING LOOKS Filed Dec. 3, 1928 .ummlllllllnllllll||||||||||||l|||||||||||| .7

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Patented June 24, 1936 N TE A :PATENT'OFF-I'CEY WILLIAM H. KING, or cmnron. mAssAoiiusETr AssIGNoR TO cjRom'rroN -&

KNOWLES 1.00M :wonxs, or woacns'rnn, mssnonusnrrrs, .A coRronA'rIon or MASSACHUSETTS YIELDABLE 3013mm surron'r non wErr-nnrLENIsHxNG LooMs Applicatizinfilcd December 3,1928} Serial No. 323,542.

This invention relates to improvements ,in bOblJlIl supports for weft replenishing looms and it is the general object of the invention to provide a support which is yieldable in 5 all angular directions withres ect to its axis and is so held as to beyiel able under action of a force acting parallel to its axis and toward'its support.

In my co-pending applicationSer. No.

i 10 251,992, I have set forth-a coil spring bobbin support comprising a single piece ofwire bent on itself to be substantially cylindrical in form with preferably a conical bobbin supporting tip. A support made according to that application will yield in anyangular direction with respect to the axis but no means are provided whereby the support as a whole may move alongits axis whenstruck by a misplaced bobbin. It is a further object of my present invention to provide a holder through which the support may slide, said holder having a bore or bearingportion which serves asia sliding guide for the coils of the spring. i

The support, being formed. of. a coil spring, tends normally to :assume a position with its axis'substantially straight and if deformed will exert a force tending to straighten its axis. This fact'I make use of by requiring a deformation in the normal axis of the spring when the latter moves to abnormal osition-and relying upon the tendency of the spring to straighten its axis to restore'the bobbin support :to normal position A 'more specific object of my present invention is to provide a "pivoted :member which will act'to cause a deformation in the normal axis of the spring support when the latter is actedupon by a force parallelto' the axis.

Another b]eCt of-my invention is to probbbbin near its t p vide means for adjusting thepivoted means and also the stop for thespring support so that the I latter may be given 1a plurality. of positions in each of which it will act by its own tendency to straightenits axis to return to normal position whenadeformed.

With these and other objects in; view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the. accompanying drawings wherein I have shown a convenient embodiment of-my invention,

Fig. 1- shows a portion of a multicolor weft, replenishing mechanism with my invention appliedthereto,

Fig. 2 is a diagonal rear elevation lookingjn the direction of arrow 2, Fig. 1,

ig. 3 is an-enlarged vertical section on line 31 3 of Fig. 2, i

4 is a transverse of Fig.3, and I Fig. 5 is a View similar to Fig. 3 but showing a modified form of the invention. -Referring to Fig. 1 it will be seen thatI have provided a loom frame mounted a foot 11 of a multicolor magazine M; The latter is provided with atransferrer arm 12 which maybe actuated in'any approved manner and said magazlne isprovided with a plurality of guideways 13 Whichdirect bobbins'toward transfer position. i

PV The magazine incorporates in its construction several tie rods the lowerjrear one of which is indicated at 14. It is to be understood that there are ordinarily four separate andindependent supports to hold a bobbin in transfer position in a multicolor weft 're plenishing mechanism ofthis usual type, two of'these supports being for the front side of the bobbin, one at each end, the other two beingfor the backof the bobbin, one at each end. While it is possible that all four of thesesupports may be made according to my present invention yet for the purposes of illustrationI have shown but one, namely,

forjthe back of the magazine to support the The rear tie rod 14 has mounted thereon a holder which is. held in longitudinally and angular-1y adjusted position with respect to the tie rod by means of a screw 21. Said holder has a bearing portion 22 provided with a bore 23shown particularly in Fig. 3. -ASShOWD in the latter figure the upper porjsection on line 4-4 on which is r tion of the rear end of said bore is rounded as at 24 for a purpose to be described.

Said holder is provided with a threaded hole 25 preferably parallel to the bore 23 and said hole 25 receives a screw 26 which is formed with ahead 27. The latter has extending transversely therethrough a pin 28 which may be held in position by a cotter pin 29 on one side and a head 30 on the other side. A wall 31- is formed as shownin Fig. 3 and is positioned to engage a web 32 formed as part, of a pivoting member 33.

As shown inFig. 2 said pivoting member is provided with spaced ears 3 L through which the pin 28 extends to pivotally connect the head and member. Theweb 32 is so positioned that it will engage the wall 31 normally as. shown in Fig. 3. ,;The lower end of the pivoting-member 33 is provided with aholding bar 36 formed preferably as an integral part of the pivoting member 33.

The bobbin support 37 isformed in a coil spring as clearly set forthin Figs. 1 and 3, the coils being, closely wound together, the upper coil being formed as an eye 38 which may embrace the part of the holding bar 36. The lower end of the spring 37 may be provided with :a bobbin engaging tip39 to cooperate with other bobbin 'supports to hold the bobbin in proper position for transfer. As shown clearly in Fig. 3 said tip .may be provided with an upper threaded portion 40 whichis threaded into the lower end of the spring and clamped by the-coils of the latter. The coil spring 37 may be substantially the same as that shown inmy aforesaid co-vpending application.

- The spring is madeito fit snugly in, the

bore 23, being proportioned. to slide through the latter when required to do so, but having a tight enough fit with said bore so that the bobbin tip 39 will be placed correctly to hold the bobbin in proper position.-

The'parts are so proportioned that under normal conditions the rear upper end of the coil spring will be held slightly out of alignment with the forward or lower portion of -the'.spring dueto the action of the holding bar '36 and the eye 38.- Under normal conditions the stress setup by this slight deformation of the axis of the spring will be found suificienttohold the bobbin support in theposition shown in Fig. 3.

In operation, during a normal transfer the bobbin B will be depressedby the transferrer arm 12 and will cause a downward deflection of the spring.=37 to permit the bobbin to pass into the shuttle not shown. It occasionally happens,however that a bobbin will be misplaced with'respect to the shuttle due possibly to an improper transferand as the lay moves rearwardly the bobbin will'project upwardly soas .to engage the bobbinsupport. WVhen this happens it is desirable to provide some form of yielding connection which will prevent breakage of the bobbin or support. This yielding is accomplished by my present invention, the support moving to the dotted linefposition shown iniFig. 1 when subjected to an endwise pressure exerted toward the holder.

It will be seen from the dotted lines that the pivoted member 33-swings around the pin 28 as an axis, moving the holding bar in a direction transverse with respect to the normal axis of the spring 37', thereby setting up in the spring stresses which later will "seek to returnthe spring to its normal position. \Vhenthe bobbin passes out of engagement-with thesupport so that the latter isnot acted uponby the lay or any other force tendingto hold the same in its abnormal position, the stress set up in the spring will tend to move the latter in a direction to relieve thestress, namely, back to the normal position. This movement will be limited by engagement of the web 32 withthe wall 31. By reference to the coils of the spring shown in dotted lines in Fig. 1 it. will be seen that the lower portions of the coils are spaced, increasing thelength oftheucenter line of the spring,and their natural tendency to move together. to

shorten the center line of the spring is thought to be the reason whythe; spring returns to the normal position: shown in full ,linesin Fig. 1. The return movement of thespring to its normal position is facilitated by the rounded surface 2 L located on that portion of the bore 23 which is adjacent. the pivot around which the eye 38 swings.

I From time to time it becomes desirable to adjust the position; of. the tip 39' and this adjustment may lee-effected by moving, the screw 26 either into or out of the threaded hole.25,the adjustment being secured by a check nut 50.. p

vIn the modified form of the invention shown in Fig. 5 the constructionwis substantially the same as that found in the pre ferred form except that the adjustable feature is omitted. The holder may besupported onthe tie rod l t and held in adjusted position by screw 61. .A bore 62 similar to. bore 23 extendsthrough the. holder and the spring support 63 is proportioned to have snug but sliding fit with the bore 62.

The rear eye '64. formed from one ot the coilsofthe spring projects beyond the bearing 65 of the holder so as to receive the lower end ofa link 66 pivoted to the holder at being to causethe'rear end ofthe'spring 63 to start a rapid upwardmovement as soon macaw as, end pressure is exerted onthe bobbin sup porting tip of the spring. As in the preferred form it is believed that the inherent resilience of thespring which tends normally to straighten the axis of said'spring is the force which serves to restore the sup port toits normal position aftermovementto abnormal positioniby a misplacedbobbin.

Experienceshows that if the spring berestore the spring to normal position.

Fromthe foregoing 1t"\villbe"seen that lhave provided a very simple formof coil spring bobbin support'which will not only yield in all, angular directions withrespect agin to its axis to accommodate proper movements of the bobbin, but will also .move longitudinally along its axis when engaged .by a misplaced bobbin and at the sametime be deflected so asto set up a stresswhich w ill lateract to restore the spring tdits normal, position by. a reverse movement along its, axis.

7 It will also beiseerii that longitudinal movement 'offthe spring isefffected without the useof fadditional[sprin s or weights; It williurtherbe seen thatfft 1e end of the support opposite the bobbinena way to deform its axis. when subject to an abnormal longitudinal pressure, and that these means set up stresseswhich are responsible for thereturn of the support to its normal position;

Having thus described my invention it will be apparent that changes and modifications may, be made therein 1 those Skilled 'in the artwithout departing 1 mm the spirit andfsc op'e'of the invention and I do not wish to be limited to the details herein disclosed,

but what I claim a 1 'In a weft ireplenishing mechanism; a substanti ally cylindrical inherently resilient bobbin support movable, as a 'unit along its axis and resisting a bending of the axis thereof, means tocause a bendingof said su'pportwhen the latter ismoved longitiidinally along its axis, and means cooperating withithe bent part of the support to assist the support by the inherent resilience there not "to restore the .axis of the supportto normaL- T v f ,2.In a weft replenishing mechanism, a substantially cylindrical inherently resilient end of the spring is acted upon in bobbin. support a fixed holder through which the support may slide, and means acting to eiiect-benjding-pf theisupport with respeetto theholder when said supportis subjected e to an abnormal longitudinal movement, said holderand bent portion-0f the support cooperating to restore thereupport' to normal position: z

3. In a weft replenishing mechanism, a

fixed-holder having a boreextendingthere through, an inherently resilient bobbin support extending through and slidable inthe bore and having an axis which isno-rmally of given form, and means, acting on said support when the latten isanoved relatively to i the. bore by anfl abnormal force to cause the] axis of the support ElLQQ aSSUHIQ some form other than the given form to set upja stress in said-support wlnch will cooperate.

with the holder totend to return the support tonormal position." a I 4. In a-weft replenishiigw'rn fixed holderrhavinga bore extending there- ,through, a coil spring bobbin, support having a substantially strai-ght axisextending through the here, said support I being slidable through said bore, and a connectionbetween the spring and the holderqto cause a bending of the axis ofthe spring when the support is subjected to an abnormal, endwise; movement through the. bore, thus setting up stresses in, the spring to cause the latter to cooperate with the holderto, tend to move ithe supportto normal position.\ I

v 5.5In a weft replenishing mechanism, a 3.. fixedholder-having a bore extending therethrough, -,a ,:co i-l spring bobbin support extendin through ;,l3h8 ib016, a linksupported the olderiand pivotally movable with respect to the latter and having engagement 1 with the spring,*said spring-being movable through the-bore of the holder to cause pivr ota l movement of the link and the latter act n toide'flect the axis ofthe'spring 6. n a weftreplenishing mechanism,- a

echanism ;a

a i 11 .fixed holder having a bore extending therethrough, :an elongated inherently resilient bobbin {support I slidably. ,mounted through i the bore", and: a link interposed 3 between the holder land the support 1 and aetingpalwhen 1 said? support is i subjected-to .abnormal'endwise movement to deflect the normal axis of said support;- and thereby setup a stress iwhich-telrds'to return thesupport'to normal "position. I L

fixed holdenehaving a bore extending therethrough, an! elongated} inherently resilient bobbin support located'inand 'slidablewith respect to thefbore, a link operatively connected' ;tothe: support, and ,means capable of assuming a plurality-of positions with. respect to the holder and having pivotal icbnnection with the link, said link acting to p a I ;-12o' In WW9? p gmechanism, a V

bore, and means efl'ect deformation of the axis of the support whenthe latter moves through. the bore.

8. In a weft replenishing mechanism, a fixed holder having a bore extending therethrough, an elongated inherently resilient bobbin support located in and slidable with respect to the bore, a link operatively connected to the support, and means capable of assuming a plurality of positions with respect to the holder and having pivotal=connection with the link, said link acting to effect deformation of the axis of the support when the latter moves through the bore, said means being movable with respect to the holder in a direction parallel to the bore. 9. In a weft replenishing mechanism, a fixed holder having a bore extending therethrough, a screw movable in the holder in a direction substantially parallel to the bore, anelongated inherently resilient bobbin support extending through and slidable with respect to the bore, and'a link operatively connecting the support and screw-and acting to causea deformation of the normal axis of the elongated support when the latter moves longitudinally through the bore. 7

10. In a weft replenishing mechanism, a fixed holder having a bore extending therethrough', a screw normally stationary but movable in the holder in a direction substantially parallel to the bore, anelongated inherently resilient bobbin'support extending through and slidable with respect to the bore, a link operatively connecting the support and screw and acting to cause a deformation of the normal axis of the elongated support when the latter moves longitudinally through "the bore,and means to limit movement of the link and support in' one direction. x

11. A bobbin support for a weft replenishing loom including a holder having a bore therethrough, a'coil spring bobbin support slidable in and extending through the I connecting the support to the holder to cause the support to move away'from the axis of the bore when moved longitudinally through the bore. i:

' l2; A bobbin" support fora weft replenishinghloom comprisinga holder having a bore therethrough, an inherently "resilient elongated bobbin support slidable in and extending through the bore, and means to cause movement ofa portion ofthe support away from the axis of the bore as the -sup-' port moves longitudinally through the bore.

=13. In a bobbin support for a weft replenishing loom, a holder, an inherently re-, silient bobbin support movable through the holder, and means to cause the inherent 'resilience of the support to act to return said support to normal position when moved to abnormalposition through the holder.

14; Ina weft replenishing mechanism, a

coil springbobbin support normally in position to assist in supporting a bobbin, means to cause a deflection of the axis of the support simultaneously with a longitudinal motion thereof,-thereby setting up a stress in the support, and fixed means form when the support moves'lon itudinallyalongsaid axis away from bo bin supporting position, and additional means to deform the flexible portion so that the corresponding part of the axis is of a form other than the given form, thereby setting up a stress in theflexible portion, the means and additional means ooacting with the flexible portion when the latter is under stress to returnthe flexible'portio n and axis thereof to normal whenthe support is free to return tion. v

16. In a weft replenishing mechanism, a bobbin support, a portion thereof being resilient and normally having a given form, said support havingan axis along whichit may move longitudinally, means to preservetheoriginal .formof part of the support when the support moves along its axis, and a device cooperating with the means to deflect another part of the support when'said support has a longitudinal to normal bobbin supporting posimovemntand tending to setup a stress in the support to return the same to normal position. 7 r

17. In a bobbin holder for a weft replenishing loom, a bobbin support-having a resilient portion and movable as a whole away from bobbin supporting position,a member acting onthat end of the support opposite thebobbin engaging end, a pivotfor said element located at fonei side; of the axis of the support, aguide rto engage a portionof the support between the bobbin vengaging end andthe element. and located on that side ofthe axis of the pivot said guide assisting in determining the motion of the support away from bobbin supporting position, and. asecond guide located on that side ofthe iaxis of the support opposite thepivot and located between'the first guide and the bobbin engaging end'of the support, said support when moving away from bobbin supporting position having a portionofthe *axis thereof determined by said guides and having-anthe support adjacent other part of the axis deflected by said pivoted element to produce a stress in the resilient portion of said element tending to restore the latter to normal bobbin supporting position.

In'testimony whereof I have hereunto affixed my signature.

WILLIAM H. KING.