US1149049A - Sewing-machine loop-taker. - Google Patents

Description

M. HEMLEB.

n SEWING MACHINE LooP .Tm-2R. APPLICATION FLED MAYIS, 1914.

11,149,049 PatentedAug. 3,1915.

2 SHEETS-SHEET i.

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`SEWING MACHINE LOOP TAKER. APPLICATION HLED MAY15. 1914.

1,149,049., l Patented Aug. 3, 1915.

2 SHEETS-SHEET 2.

WTNESSES: INI/ENTOH UNITED siuitrEs .i ATENT oEEIoE.

MARTIN HEMLEB, or ELIZABETH, NEW JERSEY, AssIGNoR 'ro THESINGER MANUEAG i TUBING. COMPANY, A`CORPORATIQN F NEW JERSEY.

SEWING-MACHINE LooP-TAKER.

Application filed M ay 15, l1914. Serial N o. 838,6;72.

To Zlfw/wmlz't may] concern:y

Be it known that I, RTIN HEMLEB, a

citizen of the United tates, residing at' Elizabeth, in the county of Union and Statefof New Jersey, have invented certain new and useful` 4Improvements in Sewing-Machine Loop-Takers, of which thegfollowing is a specification, reference beingf'had therein to the accompanying drawings.

This invention relates more particularlyf to an improvement in revolving hook machines in whichthe loop-taker performs cir` cular movements' upon anaxis which is substantially vertical or parallel with the path of reciprocation of the needle; and it has for some of itsv chief objects to provide an advantageousconstruction of the loop-taking member for prevention of injury -by penetration of lint o r'dirt in the bearings between the moving parts, to facilitate the removal "and insertion of bobbins from the `tlireadcaseand to insure' the free casting of the needle-thread loops over the threadcase.

In the preferred embodiment of the imgprovenient, the loop-seizing member. or hook is cup-shaped, with a closed bottom' and apertured sidelwalls for the lateral release of lint or dirt deposited therein in the operation of the machine, thereby protecting from clogging a pair of intermeshingl gears beneath the same/from which it derives its operative movements.. The hook is provided with an inwardly extending bea-k for seizure of a thread-loop from the needle vreciprocating'within its circular path. of

. against collision of the point ofthe beaky 'with the needle. The side wallof the hookyis further Vprovided in its inner face withan open-topped yraceway in which the threadmovement, and is formed with a segmental needle-guard beneath said beak to `insure case is peripherally fitted and confined therein by meansof a'- yieldng cover-plate between which andthe top of the hook a lateral opening is lprovided. adjacent the beak for ejection of foreign vmatter from the bearing with the threadecase thus provided.

The thread-case body is preferablyof-'disk form and is constructed rwith an openf topped bobbin-cavity having 'a side wall projectingabove said body and oppositely 'recessed 'or notched in the upper edge 't0 eXposethe upper flange of 'a contained bobbin, the bobbincavity being arranged eccenai'eauya ma ,at the. Side of the hook vfarthest from the needleLpath so as I'to ex-4 pose the full. area of thebobbin-cavity later- :wall upon the side toward which the threadloops are carried from the needle in the i Aloop-casting operation. l

Specication of Letters Patent. Patented Aug. 3,V 19.15..

vvThe thread-Case is provided 'with a subs tantially radial lug engaging a stationary partfof the machine for maintaining the thread-case against rotation, an upwardly inclined guard extending to the top of said lug being provided on theside thereof toward which the thread-loops are cast. f

In the drawings, Figure 1 is a sectional side elevation, and Fig. v2 a bottom plan View yof a sewing machine provided with the present improvements. Fig. 3 isa perspective view of the loopftaker and a portion ofthe sewing machine bed-plate. Fig.-

4 is a plan of the loop-taker with the'throatplate. Fig. 5 is a transverse section of the loop-taker, and Fig. 6 asimilar view taken at right angles withl the lsectionplane of Fig. 5. -Figs 7 and 8 are perspective views of the thread-case and the hook, respectively,

` and Fig. 9'is asimilar view of the raceway never of the hook- Fig. lOis an elevation driving means represented in Fig. 1.

As represented in the drawings, the machine isconstructed with the usual bedplatel-having the bracketearm comprising the hollow standard 2 and the overhanging tubular member 3 in which is journaled the main-shaft 4 having operativelyl connected with its forward ,end byusual or suitable means the reciprocating needlefbar 5 carrying' the needle 6. rllhe main-shaft 4 has secured thereon in its rearward portion the hub ofthe bevel pinionl 7 meshing with-a similar pinion 8 upon 'the upper end of the vertical shaft 9 journaled within the standard 2 and carrying at its lower' en d the. bevel-pinion 1Q meshing with a similar pinion Il fixed upon the rearward end of the' horizontal shaft 12 journaledA in suitable "showing a modification of the loop-taker l 17 of the bracket 18 depending froml the forthe hub of the pinion 22, and secured thereonby means of the set-screw 24 is'the apertured boss 25 depending from the bottom 26 of the cup-shaped hook 27. j

The body of the hook is provided at its upper edge with the annular flange 28 with-v in which the cylindrical wall is formed with the' open-topped annular raceway 29. The rim of the hook-body is formed with the inwardly extending loop-seizing beak 30 provided exteriorlyat the base with a shoulder 31 over which is secured the needle-guard plate 32 to afford the usual throat for reception of the needle-thread loops seized by the beak. The rim of the hook-body .is provided .adjacent the shank of the hook with a flat seat 33 and at the heel with al seat-34 v between which the. upper edge of the hookbody is slightly cut out to form a depression below said seats, as represented in Fig.- 8.v

' Upon vthe seat 34 is secured by means of screws 35 the resilient segmental cover-plate 36 provided at one end with the screw-apertures y37 to receive the screws 35. and'at the reduced opposite end'with the taper linger 38 resting upon vthe seat 33 beneath the hooki shank. The' cover-plate 36 serves'to 'close the upper side of the raceway`29, and is adapted to yield adjacent the beak to prevent the clogging of said racewa'y by accidental introduction of threads or other matter which may be ejected through the slit 39 alforded between the depressed Lipper edge of the hook-body and the cover plate, as represented in Figs. 5 and 6, the hook being outwardly -beveledin such portion, as represented particularly in Fig. 8.

Thebottom of the hook-body is entirely closedto prevent deposit in the intermeshing gears 22 and 23 of lint and dirt which may be collected therein in the stitching op-l eration, such substances being vreadily thrown out by centrifugal action through fthelateral apertures 40 of the hook-body.

The part 27 of the side wall of the hookbody intermediate .the beak and heel has an inner face flush with the inner face of the beak 30, and affords a needle-guard to prevent collisionof the point of the beak withv the needle in the loop-seizing operation..v

The thread-caseis shown' constructed'with 4 the disk-body 41 peripherally fitted within the raceway 29 and provided in its edge with I' the' thread-clearingnotches 42. Itis provided upon one side with the usual recess or pocket' 43 and eccentrically toits axis with the open-topped bobbin-cavity 44'having at the bottom and below the disk 41 the inwardly extending flange 45 for sustaining thelower flange of the disk-bobbin 46 carrying the lower or locking thread. The wall of the cavity 44 extends upwardly above the disk-body 41 and is provided in its upper edge with the diametrically opposite fingernotches or recesses 47 and 48r arranged sbstantially upon a diameter at right angles to that passing through the pocket 43 and the needle-path. These linger-notches extend down below the upper flange of the bobbin 46 to enable the latter to be easily grasped by the thumb and linger' of the operator when the bobbinis in normal operative position in the thread-case.

Upwardlyinclined loop-defiecting guardribs 49 and 50 extend from the upper face of the disk-body 41 to the top of the bobbin-cavity wall upon opposite sides of the' linger-notch .47. The operative edges of `these ribs act' to direct the upper limb of the thread-loops over the rim of the upper bobbin-Harige in the loop-casting operation.

vThe wall of the bobbin-cavity above the disk 41 is formed opposite' the pocket 43 with the downwardly inclined thread-slit 51 terminating in the enlargement 52, the slit 51 being covered bythe tension-spring 53 (secured to said wall by the fastening screwv54 and the adjusting screw 55- in the usual manner. drawing the thread upon the top of the side wallof the cavity through the slit-511 in the The thread-case is threaded by aperture 52 and under the tension-spring 53 vfrom beneath which it issues through the notch A56 in lthe upperedge of the bobbin-v cavity wall.

The bobbin-cavity wall has projectingin a substantially-radial direction therefron adjacent the pocket 43 thelug 57 whose'extremity entersthe notch 58 in the forward edge of the holding bar 59 secured by screws 60to the bottom of the bed-plate and adaptved to restrain the thread-caseagainst turn-l ing with the hook. The bar 59 is formed with a second notch 61 to provide clearance for the needle. i

In the loop-casting operatiomthe upper limb of the needle-thread loop encounters the bobbin-thread issuing from the notch 56 and initiallycarriesl it across the thread-case to a' position adjacent the needle-path. In

order to prevent the bobbin-thread from accidental introduction beneath the-holding lug 57, the latter has upon its sidetoward' which the thread-loops are cast the lateral guard-rib 62 formed with upwardly inclined: upper face or edge extending to the'top` l of said lugwhereby the lower thread end is.

deiiected upwardly over such lug in the initial stitch forming operation: .This rib joins the lug 57 intermediate its inner and outer ends and 4extends `from the top ofthe "body-flange 41 so as to insure properengagement with the thread. f

As represented more particularly in Figs. land il, the hook-body is so disposed and the thread-case so formed, that the entire bobbin-cavity is exposedlaterally beyond'the edge of the throat-plate 63, so that", by the mere withdrawal of the bed-plate 'slide'. normally covering Vthe same, the bobbin is accessible totheoperatorwho is able to remove a bobbin for replacement by another A lor for `other-purposes by merely reaching in and grasping the upper flange of the vbobbin and -withdrawing .the same without the em-l l p'loyment of an ejector which has previously Y been required with loop-takersof the present type. In the operation of the machine, the thread-loop presented by the needle is seized by the beak within'the pocket 43 and subsequently engaged by the'inwardly inclined loop-dividing shoulder ell. The lower limb is thence deflected bythe rib 4A beneath the bottom of thebobbinlcavity, and the upper limb is similarly deflected over the bobbincavity by the actionofthe guard-ribs 49 and 5o.

AS before indicated, in the Case idf' the `initial stitch of a series the loose end of the lower lthread is carried across the threadca'se by the needle-.thread loo flected upwardly over the'lug 5 and carried ultimately through the needle-hole 65 of thethroat-plate to the under face of the Work.

The lead of the lower thread thereafter ref ,-mains fixed betweenthe notch 56 in the top of the thread-case wall and. the needle-hole 65, the guard-rib .62 having accomplishedits 'purpose in the initial stitch-forming action.

In order to secure greater compactness and certain other advantages, the modliied train of loop taker actuating mechanism Irepresented inFig. l0 may be en`1ployed.l In l this case the main-shaft 4 carries the larger bevel-gear 7- meshing with the bevel-pinion 8 ofthe vertical shaft 9 which is connected by the miter-gears lO'and ll with the lower shaft 12 which is in turn connected by the miter-gear 23 with the lgear 22 which is in practice secured to the vertical hook-shaft.

From the foregoing description-it is ob.

vious'that the present improvement is not limited to the specific constructionand arrangement of parts hereinshown and described, but may be varied materially therefrom within the scope of the invention.

Having thus set forth the Ynature of the invention, what I'claim herein is l. I'n asewing machine, the combination with 'a throat-plate having aneedle 'aperture, and aneedle reciprocating through said aperture, of a rotary hookimemberhaving an axial cavity beneath the throat-plate on one side but otherwise exposed beyond one edge of the same, means for imparting to it a plurality of rotations for each reciprocation of the needle, a thread-case journaled in said member and having a bobbincavity disposed eccentrically to `said member on the side thereof farthestffrom the needle-path and 1wholly exposing-said bobbin-cavity laterally of the-adjacent edge of the throat-plate, and a bobbin within said cavity.

2.v 'In a sewing machine, the combination with a reciprocating needle, of a loop-taker `shaft disposed substantially parallel .with said needle, a fixed bearing in` which said shaft is journaled, a gear fixed upon said I shaft and having an'upwardly extending hub, a cup-shaped hook-member formedy with a depending hub iitted to'and secured upon the hub of said gear, and actuating means for said hook-member including a gear meshing with the iirst-named gear.

3. In a sewing machine, the combination, witha reciprocating needle, of a circularly' movable cup-shaped hook-member providedwith a loop-seizing beak movable in a path embracing the needle-path andprovided beneath *said beak with al segmental needleguard' flange movable in a path exterior to and embracing the needle-path, 'and a' threadcase journaled in said hook member.

4. In a sewing machine, the `combination l l with a rec1procating needle, of a circularly movable. cup-shaped hook-member having a loop-seizing. beak and formed in its inner face with an annular open- `topped raceway and with adjacent4 circumferentially separated seatsof which one is 'disposed near the. base of the beak with anv with a reciprocating needle, of a hook-member .circularly movable upon a 'vertical axis,

ber and formed with an open-topped'bobbin-cavity having its side .wall recessed in the upper end to expose the edge of a bobbin therein, a disk-bobbin within said bobbin-cavity, and means for restraining the threadcase against rotation.

a thread-case journaled in ysaid hook-mem- 6. In a sewing machine, the combination with a reciprocating needle, of a hook-mem` ber circularly movable upon a vertical axis,-

a thread-case journaled in said hook-member and formed with 'an open-topped bobbin-cavity having its side wall .oppositely recessed at the top upon a diameter. transverse to that intersecting the needle-path` for exposure `of the edge of a bobbin therein, a

' disk-bobbin Within said bobbin-cavity, and

means for restraining the thread-case against rotation.

7 In a sewing machine, the combination` Witha reciprocating needle, of a hook-member circular-1y movable upona vertical axis, a thread-case constructed With a disk-body journaled in said hook-member with an open topped bobbin cavity having -a side Wall projecting above said body andv oppositely recessed at the top upon a diameter transverse to that intersecting the needlepath for exposure of the edge of the bobbin therein, a disk-bobbin Within said bobbincavity, and means for restraining the threadcaseagainst rotation. K

8. In a sewing machine, the combination with a reciprocating needle, of a hook-member circularly movable upon a vertical axis,`

a'thread-case constructed With a disk-body journaled in said hook-member With an open-topped bobbin-'cavity having a side Wall projecting above said body and oppovsitely recessed at the' top upon a diameter transverse .to that intersecting the needlepath for exposure of the edge of the bobbin therein, upwardly inclined loop deflecting guard-ribs extending to the top of the bobbin-cavity` wallupon the loop-casting side of the thread-case, a disk-bobbin Within said` bobbin-cavity, and means for restraining the thread-case against'rotation.

9. In a sewing machine, the combination with a reciprocating needle, of a hook-membercircularly movable -upon va vertical axis, a thread-case constructed with a disk-body journaled in said hook-member With an open-topped bobbin-cavity having a sidename tothis specification, in the presence of two subscribing Witnesses. v

MARTIN HEMLEB. lVitnesses HENRY J. MILLER, HENRY A.' KORREMANN, J r.

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