US3181572A

US3181572A - Loom shuttle

Info

Publication number: US3181572A
Application number: US219312A
Authority: US
Inventors: William W Mogayzel
Original assignee: Draper Corp
Current assignee: Draper Corp
Priority date: 1962-08-24
Filing date: 1962-08-24
Publication date: 1965-05-04
Anticipated expiration: 1982-05-04

Description

May 4, 1965 w. w. MoGAYzEL LOOM SHUTTLE Filed Aug. 24, 1962 INVENTOR WLLIAM W MOGAYZEL BY M A TTORNEY United States Patent O 3,181,572 LGOM SHUTTLE William W. Mogayzel, South Dartmouth, Mass., assigner to Draper Corporation, Hopedale, Mass., a corporation of Maine Filed Aug. 24, '1962, Ser. No. 219,312 4 Claims. (Cl. 139-207) This invention relates -to loom shuttles and, more particularly, to an improved and novel means of assembling a shuttle'spring cover in the bobbin recess thereof.

It is a general object of the invention to provide a shuttle spring cover retaining means that will maintain its assembled position in a shuttle.

It is a further object of the invention to provide a pair of spring cover retaining members which shall serve to eliminate the old and well-known undesirable condition of conventional cover screws working loose and then failing, and also to eliminate shearing of the screw due to repetitive transfers.

'It is more specific object of the invention to provide a pair ofy spring cover retaining members which serve more securely -to support the cover member in operating position and by means of the extended threaded portions of said members, substantial contact area is had between said threaded portions providing improved holding properties for maintaining these members in their initial position.

- Further objects of the invention will become apparent from the following more detailed disclosure.

Shuttles utilized in looms of the automatic bobbinchanging type are provided with a spring bobbin holder and a spring cover fixedly positioned in a recess at one end of the shuttle and the spring member is provided with internally grooved spring biased jaws which are adapted to receive and hold a filling bobbin in a manner well known to those familiar with the art. The spring cover is adapted to assemble over the looped portion of the spring member and serves as a guide during the replenishment cycle to direct the rings provided on the butt of a bobbin to their respective grooves in the jaws of said spring member.

The assembly and function of the foregoing parts being well known to those conversant in the art, it is considered satisfactory at this point to call attention to the following patents which depict and disclose the conventional means of assembling shuttle spring covers. Reference is hereby made to the information disclosed in patents numbered 2,640,507 and 2,778,381.

This method of assembling the shuttle spring cover has been utilized for many years and with the introduction of the improved models of looms and the increased speeds with which they were designed to function created an undesirable and detrimental condition of the shuttle spring cover screw working loose after a short period in operation and/or becoming sheared due to oscillations imparted in the transfer operation. These conditions are attributed to the accelerated speeds to which shuttles were subjected as Well as the increased number of bobbin transfers.

A slight looseness of a cover screw sets up a slight oscillating movement of the screw at each pick and at transfer when the bobbin butt strikes the guide portion of the spring cover, which initiates fatigue failure of the screw resulting in breakage at the threaded portion thereof. Additionally, a cover screw will often loosen progressively till the head portion has worked upwardly a sufficient distance to cause a smash, or, in other words, the head of the screw will contact and tear out a series of warp threads.

Until the present invention, this condition has been 3,1815@ Patented May 4, 1965 considered quite serious and excessive time has been required to check these screws constantly for proper tightness. According to the instant invention the above disadvantages are overcome through use of applicants novel spring cover retaining members.

A preferred form of the invention comprises the combination of an internally threaded thrust bushing and locking screw. The thrust bushing includes a base portion which is adapted to seat in a preformed mating aperture that is provided on the underside of the body portion of the shuttle, and is shaped in such a manner as to resist turning therein. An integrally formed cylindrical barrel portion of a diameter somewhat smaller than the outer dimensions of the base portion, extends upwardly from the latter first through an aligned aperture in the lower part of the cover member, thence between the looped portion of the spring itself. This barrel portion extends upwardly a distance sufficient to place the upper end thereof in close proximity with the underside of the upper portion of the cover. The upper end of the bushing is provided with an integrally formed cylindrical extension of a smaller diameter than the barrel portion which is adapted to enter an aligned aperture provided in the top of the cover. A locking screw assembles in the cylindrical extension and barrel portion and when tightened, it draws the upper part of the cover into contact with the bushing which provides through extended area contact of the threaded members, a firm and positive means of shuttle spring cover assembly.

The invention will be described in greater detail by reference to the additional embodiments thereof as illustrated in the accompanying figures of drawing, wherein:

FIG. 1 is a plan view of portion of a shuttle according to the invention showing the top of the locking screw utilized to maintain the spring cover in its proper operating position with respect to the spring bobbin holder;

FIG. 2 is a view in side elevation and partially in section showing the preferred embodiment of the invention as heretofore described; and

FIGS. 3 and 4 are views similar to that of FIG. 2 but showing a first and second modification of the retaining members that may be utilized.

Now referring to the figures of drawing, FIG. 1 shows one end only of a shuttle 1G having a bobbin recess 11 which at that end illustrated, is provided with a spring bobbin holder 12 and a generally U-shaped spring cover 13. In a manner well known to those familiar with the art, the spring bobbin holder 12 is adapted to receive a filling bobbin such as that depicted by numeral 14 having a butt portion 15 on which a plurality of holding rings 16 of the conventional type are mounted. FIG. 2, being the preferred form of the invention, shows the same in side elevation with part of the shuttle and its components in section.

The invention comprises a pair of retaining members indicated generally by numerals 17 and 18. Numeral 18 indicates an internally threaded tubular thrust bushing and numeral 17 indicates the locking screw which is adapted to assemble therein. The thrust bushing 18 is provided with a base portion 19 which is adapted to fixedly seat in a preformed mating aperture 20 provided on the underside of the shuttle 10. An integrally formed cylindrical barrel portion 21 having a diameter somewhat smaller than the outside dimensions of the base portion, extends upwardly from the latter, first through an aligned aperture in the lower portion of the spring cover 13, thence between the looped portion of the spring bobbin holder 12. This cylindrical barrel portion extends upwardly to a point which places the upper part thereof in close proximity with `the underside of the upper part of the spring cover 13. The upper part of ice this barrel portion is provided a stepped cylindrical, Y and integrally formed portion 22of a smaller diameter l which isyadapted Vto enter partiallyyan alignedVV apertureV provided inthe top of the spring ycover 13.` The assembly and tightening Vof the Ylocking screw V17 in the threaded portion of the thrust bushing 18 drawthe upper portion of the spring coverf13 into contact with-the ytop'of the" Y barrel portion 21 to provide a `firm and positive means-y of maintaining theretaining members -17 andjj18 in their.;

initial position through substantial threaded V.':ireafc'ontact of these members. Y

Av modification of the Yinvention is shown inFIG. i31"."

which also includes a thrust bushing indicated generally fr by numeral v23 and a'locking-screw 24. f f

As with the .preferred former thrust bushing, this screw, said thrust bushing 2. Foruse inV a including a baseportio'n with a` cylindrical ybarrel'portionfextending therefrom, said barrel portion beingprovided at its free endfwith a stepped cylindrical and j integrally forme'd portion lof a ysmaller diameter whichV is adapted V.tovseat in an Valigned'aperture provided .in the top. portion" of 'lsaidlspririg cover, said cover-,screw beingVY adapted to assemble 'in said cylindricalY t. barrel `portionV providing yextended Contact larea-between Y Y' the "threaded rnernbersxass'urin'gY positiveand firm asse1:n bly Ybetween' the same and said'sprin'gbobbin Vholder and spring'cover. Y' A Y o Y I n K loom' shuttlejhaving abody portion with aV centrally located-:bobbin compartment anda spring YV'bobbin holder and spring cover having interconnected modification yincludes a'base portion 25,V that is adapted Vto seat in the preformed aperturefZU ofthe shuttleV and is provided Jwith an integrally formed cylindrical barrel portion 26' extending from said base portion.

spring cover 13'and the vlooped portionof the/spring bobbinv holder `12 but terminates at apoint A,which places the top of said barrel portion-in'close proximity k(with:

Y Thisbart- Y rel portion 26 -passes through the lower portion ofthe top and lower portions which are adapted to extend from t one'end'offand intov said compartment, a retaining means VVfforf.fiiiedlyi'positioning said,spring cover in said'compartment and incontact with said bobbin holder which comprisesvthe combination of a'thrust bushing internally threadedfor substantiallvits entirelength and a.cover screw, Vsaidthrust bushing including a base portion with cylindrical barrel( portion extending; therefrom, said 47V'barrelportion .being provided at its freegend with a the undersideof the'upper portion of the spring cover 13 Y and in alignment with a countersunk hole providedv in the latter. HThis thrust bushing is internally threaded` for its entire length, andthe assemblyand tightening of'V screw 24 therein draw the upper portion of cover 13 into. f

contact with the top of the barrel portion `26 forming a rm and positive Ymeans of assembly as with the preferred form ofthe invention.

Now referring to FIG.- 4,' a second modication of the y Y, invention is devoted toward what is more or less a reversal of the practice disclosed withrespect to FIGS. 2 and 3,

in that, the locking screw` 27 ris provided with Van inte.

grally formed base portion'28 which is adapted to seat Y l in the preformed openingv 2t). The screw portion 27ex- Y tends upwardly in the same manner as the barrel-por# tion 21 of the preferred form and is adapted to receivev thereon an internally threaded cylindrical.. thrust bushing:

29. This'thrust bushing is provided with an upper tapered and slotted head portion 30 whichV when assembled ony screw 27 is caused to seat in an aligned countersunk hole providedin the upper part fof the spring cover 13. The cylindrical part of thisV bushing then .passes through theA` looped portion of the spring bobbin holder`12 and thence through an aligned aperture in the lowerV portion of sa1d spring lcover 13. A s with the iirs't modification and preferred formof the invention, tightening of thesefre-n' taining members also provides a rm and positive meansf of maintaining said Vretaining members Vin theirV initlal positions by providngr 'extended lhlfeled alega Gontact between them,A .Y Y v These thrust bushings and,Y lockingfscrews underref: v peated tests and Vactualloom-running Vconditions haveV demonstrated that applicants novel means of spring cover, assembly has corrected'tlle long standing undesirable.

condition of shuttle cover screws looseningand shearing.

While one embodiment and modifications of the invention haveV been disclosed, it is to be understood that the ways.y This invention is', therefore, Vnot to be limited to,-y

the precise details described, but is intended' to embrace all variations and modications thereof falling Within the spirit ofthevinvention andthe scope of the claims;

I claimt,A 'Y ,Y Y t Y A l. In a gloom/shuttle having a bodyportionlwithja centrally located ,bobbincompartment and a spring bob,-

"steppedcylindricaland integrally formed portion of a smaller;V diameter adapted to seat in ain-aligned aperture provided* inthe top lportion ofV said spring cover, said cover screw being adapted to assemble in'saidcylindrical barrel portion providing substantial `contact'area between the threaded'members assuring positive" and iirm assembly'between,thej -same and said spring bobbin holder and spring cover.v f v 3. In a. loomshuttle having abody portion witha centrally located bobbin compartment and Ya spring Vbobbin holder and a generally U-'shaped spring cover havingV interconnected top and lower portions positioned atl one end of said compartment Vand'fin'clarnping relationship f Y with said bobbin holder, Ya retaining 'means for fixedly positioning said spring kcover-finy said compartment and .in contact with said bobbin holder which comprises the combination of a thrust bushing internally threaded for substantially its entire length and atthreaded .coverrscrew, one of said' combination of thrust-bushing and Vcover vscrew extending through the upper-.portion ofk said spring cover and the otherV of said 'combination' extending Y through the lower portionV of said cover as well asrthrough` a portionrof the shuttlebody andbeing non-rotatable therewith saidthrust Vbushing including a base )portion V6() inventive concept may be Vcarried out ini a number of with a cylindrical :barrel portion extending therefrom,

said barrel portionI terminating immediately adjacent the Vunderside'of said upperportion, said cover screwhaving` substantiallyv theentire threaded Aportion .thereofL received into saidbarrelrportion so that movement orf said'rupper portion of said spring cover is ,restricted between-a head portion of the cover screw andthe terminal portionAV of thejbarrel Vwhereby said cover screwY is substantially "strengthenedto eliminate shearing thereof due to repeti-` Jtive bobbin transfers and there is provided extended contactv `area Vbetween said coverV screw and thrust bushing` in Vord'er'to assure positive and firm assembly of said bobbin holder and'cover.`

v.5r-4.71m4 a l.loom shuttlewliaving afbody portion :with a Ycentrally located'bobbinV -compartmen't'and a spring-:bobbin holderfan'd aV generally 'Ueshaped spring cover having bin 'holder and springcover having interconnected top and `lower portionsV which are adapted Yto.,errtendlrrornf one end of andinto :said compartment,r a retainingimeans forlxedly positioning said spring cover in Vsaidcom'partmentand in4 contact with said bobbin holderv which comprises the Vcombination of VaV thrustV bushing. Vinternally threadedfor substantially its entire Vlerigthand a cover interconnectedjtop. andV lower. portions positioned at one Y' endof; said `compartrnentga retaining meansY for `xedlyl Y positioningqsaid; spiin g .cover inj'said compartment and 4in' contac witl 1'said-bobbin holderwhich comprises fthe f y Vcombinatin vof aj thrust bushing. internallyY threadedfrfor substantiallyts entire/length and a. threaded vcover screw, said thrust'bushing.includinga Vbase portion with a cylindrical VVbarrel portion'lextending therefrom, fsaid barrel portion extendinglthrough 'a.portionlof thev shuttle .body `through saidplower 'portion of the springzcover and terminating Vagainst theunderside of said u'pper` portion,

"saidotcover screw extending through theupper portion of the spring cover and having substantially the entire threaded portion thereof received into said barrel portion to provide extended contact area therebetween in order to assure positive and firm assembly of said bobbin holder and cover so that movement of said upper portion of said spring cover is restricted between a head portion of the cover screw and the terminal portion of the barrel.

References Cited by the Examiner UNITED STATES PATENTS 8/16 Stewart 85-1 8/ 32 Schjolin 85-4 6/34 Reiter 85-4 3/40 Reid 139-207 4/57 Bousquet 139-207 11/ 61 Grunke 139-207 FOREIGN PATENTS 7/27 Italy.

MERVIN STEIN, Primary Examiner.

RUSSEL] C. MADER, DONALD W. PARKER,

Examiners.

Claims

3. IN A LOOM SHUTTLE HAVING A BODY PORTION WITH A CENTRALLY LOCATED BOBBIN COMPARTMENT AND A SPRING BOBBIN HOLDER AND A GENERALLY U-SHAPED SPRING COVER HAVING INTERCONNECTED TOP AND LOWER PORTIONS POSITIONED AT ONE END OF SAID COMPARTMENT AND IN CLAMPING RELATIONSHIP WITH SAID BOBBIN HOLDER, A RETAINING MEANS FOR FIXEDLY POSITIONING SAID SPRING COVER IN SAID COMPARTMENT AND IN CONTACT WITH SAID BOBBIN HOLDER WHICH COMPRISES THE COMBINATION OF A THRUST BUSHING INTERNALLY THREADED FOR SUBSTANTIALLY ITS ENTIRE LENGTH AND A THREADED COVER SCREW, ONE OF SAID COMBINATION OF THRUST BUSHING AND COVER SCREW EXTENDING THROUGH THE UPPER PORTION OF SAID SPRING COVER AND THE OTHER OF SAID COMBINATION EXTENDING THROUGH THE LOWER PORTION OF SAID COVER AS WELL AS THROUGH A PORTION OF THE SHUTTLE BODY AND BEING NON-ROTATABLE THEREWITH SAID THRUST BUSHING INCLUDING A BASE PORTION WITH A CYLINDRICAL BARREL PORTION EXTENDING THEREFROM, SAID BARREL PORTION TERMINATING IMMEDIATELY ADJACENT THE UNDERSIDE OF SAID UPPER PORTION, SAID COVER SCREW HAVING SUBSTANTIALLY THE ENTIRE THREADED PORTION THEREOF RECEIVED INTO SAID BARREL PORTION SO THAT MOVEMENT OF SAID UPPER PORTION OF SAID SPRING COVER IS RESTRICTED BETWEEN A HEAD PORTION OF THE COVER SCREW AND THE TERMINAL PORTION OF THE BARREL WHEREBY SAID COVER SCREW IS SUBSTANTIALLY STRENGTHENED TO ELIMINATE SHEARING THEREOF DUE TO REPETITIVE BOBBIN TRANSFERS AND THERE IS PROVIDED EXTENDED CONTACT AREA BETWEEN SAID COVER SCREW AND THRUST BUSHING IN ORDER TO ASSURE POSITIVE AND FIRM ASSEMBLY OF SAID BOBBIN HOLDER AND COVER.