US1574122A - Shuttle-shifting means for sewing machines - Google Patents

Description

R. M. SHARAF SHUTTLE -SHIFTING MEANS Fori SEWING MACHINES Feb. 23 192s. 1,574,122

originali Filed April 2, 1917 zvSneers-Sheet 1 .-Fb. 23,1926. I ixfmgzff:v

' R. M.- SHARAF.

SHUTTLE SI'IFI'ING MEANS-FOR SEWING MACHINES v Original Fild April 2, 1917 2 Sheets-Sheet 2 Q 5 am Patented Feb. 23, 1926.

g asma Par Enr esrres. g

SHUTTLE-SHIETING MEANS -FOR SEYVNG MACHINES.

vilpplieaton filed April y2, 1917, :Serial N.o.I159,G.SO. Renewed .Noi/enmen, 1921. :Serial No. 512,571.

To all whom t 'may concern.'

Be it known that I, RALPH ,M. ,SrnmAna citizen ofthe .United States, anda resident of the borough of the Bronx, in the cityand State of New York, have .inventedicertain new and useful Improvements `in Shuttletlhifting llleans for Sewing ,Machines, of which the following is a specification.

The present invention relates to improvements `in shuttle shifting .means for sewingl .machined and particularly `to an improved means forthe adjustment-of such shuttles 1in sewing kmachines of thel two needle type, an object of the invention being to enable the convenient and accurate adjustment of the two shuttles,.and simultaneously therewith, the corresponding adjustment of thefeed dog-s, throat plates and shuttle operating means.

A further object ofthe invention is to provide such means which :will be simple andreliable in construction.

Vifith theseand other'objects in view, .an einbodimentof my invention is shown inthe accompanying drawings, and this embodi ment will be hereinafter `more, ,fully described with reference thereto, and the .invention will be finally pointed out .in the claims.

In the accompanying drawings Figure 1 isa lplan view of the shuttle end of the base plate of the'sewing machine, showing the same embodied therein, and with the throat lplates removed;

yFigure 2 is a similar view, showing` the throat plates in place; Y

Figure 3 is `a vertical longitudinal sectional viewvalong the line 3 3 0f VFigure 1;

Figure 4.- is an end view;

Figure 5 isa vertical transverse sectional view along the line 5-5 of Figurel;

Figures 6 and 7 are fragmentary view-s showing the method of adjustment;

Figure 8 is a section taken on the dine 8 8 of Figure 7;

Figures 9 and 10 `are plan views of the two retaining plates employed; and

Figures 11, 12, and 13 are detail views-of the auxiliary -`adjusting arms.

Similar reference characters indicate corresponding parts throughout the several figures of the drawings. l

Referring tothe drawings, fthefbase plate V10 yis `provided with ,a shuttle opening 11v t weach side of which 4extend longitudinal ridges .12 and between which and yupon the ledge formed .interiorly thereof are sli dably secured throat plates ltand c1.5,.iand `a removable ,filler Iplate 16. The means 4.toradjusting ftliese throat plates will be hereinafter fmore fully lpointed rout.

.learilll' supports lil' and 1S extend downwardly fromthe'base plate 10, and a shuttle driving shaft 19 is supported inthem. A pinionrear 2O upon vthe endfofvthe shaft 119 is engaged'bya gear .21 ,providedupon the endA of a counter drive shaft22, rotated in any suitable nummer from `the main drive shaft. j .lvlitreggears 223. and Zlare pro vi ded upon the shaft 19, whichengage ,mitre n.earsQ and .QGcaVried :bythe shafts 27 .and 25% of ,the

shuttle hooks orloopers 29ans? bt), mounted in the adjustable supporting saddles'-ll and The ,gears ,23 `and ,.24 are `carried by sleeves Stand-234i keyed tothe shaft 19 in such a manner asto `have ,free.longitudinal movementthereon, and `to be rotated therew by. rtnnular groove reccssesl and 36 are .provided in the said sleeves 323 and 3.4 to

`the base plate Upoirthe lower ends ofthe ybolts which extend beyond the-ends ofthe sleevesthem vare @mounted two plates 53 and 54, said ,plates being ,provided lat Veaeh -of the four corners ,thereof v'with holes 55 Yand 56 `respectively, through which .the threaded ends nuts 57. `Theseretaining nutsare normally slightly loose so that, .unless other xtightening meansare employed to force the sleeves 4:9, 50, 5.1 andQ tightlyagainst the :flange 'fof `the. shuttle saddles, ,the saddles .are Y.free

to .move .lengthwise Vfor adjustment, .the slots #151, 42, .and Lily-l1, peri'nittug such movement. These .plates 53 vand 541 are of the bolts `protrude, to jreceive retaining' Y curved inwardly at their sides to reduce the materal employed therein. The plate 53 is provided at its inner face with curved reenforcing ribs 58 and Y59 (Fig. 1,0), so arranged as topermit the movement of the mitre gears 23 and 24 without interference therewith.' The plate 54 is `provided centrally with an enlarged port-ion 60, having a threaded opening` 61 therethrough, and diagonal reenforcinfr ribs 62 extend therefrom to the corners of the plate. A set screw 63 engages the threaded opening 61, and is adapted to bear at its end against the upper plate 53. By turning this screw inwardly, it` will be seen the plate 53 is forced tightly against the sleeves 49, 50, 51 and 52, at the corners, lifting the same and thereby securing the shuttle saddles tightly against the base plate, as clearly indicated in Figure 6, thereby preventing .movement of the shuttle saddles. W'hen the saddles are to be moved, it is only necessary to loosen this one set screw 63 without removal or adjustment of any other part, thereby loosening all of the sleeves, and the engagement of the shuttle saddles with the base plate permitting the ready movement thereof.

The throat plates 14 and 15 are made movable with the shuttle saddles by securing the same respectively to each of the said saddles by means of screws 64 which engage tapped holes 65 provided in .supporting blocks 66, formed upon the upper surface of the shuttle saddles. The throat plates 14 and 15 are provided with open ings 67 and 63 r spectively for the needles and the feed dogs, and between the inner adjacent edges of thethroat platesthere is provided the removable. filler plate 16. before referred to. Said filler plates will be provided. in varying sizes to .lill the opening formed upon adjustment of the shuttle sad- Ydles and throat plates in either direction.

Adjacent the throat plates 14 and 15, and also slidable between the ridges 12 and 13, there are provided removable cover plates 69 and 70 which may be removed when *desired to gain access to the shuttle.

rock shaft 71 having a concentric rock shaft 72 mounted therein, is supported at the front of thevbase plate, and at the rear thereof there is provided a rock shaft 73.

lCrank levers-7 4 and 75 are mounted respecengagement therewith of adjustment means hereinafter referred to. The rear ends of the feed bars are provided with slots 82 which slidably engage blocks 83 carried upon crank levers 84 and 85, mounted upon the rock shaft 73, and keyed thereto ir such a manner as to permit free longitudinal movement thereof. These crank levers 84 and 85 are likewise provided with recesses 86, 87 to permit t-he engagement therewith of the adjustment means hereinafter referred to. The levers 74 and 7 5 it will be seen, impart the to and fro movement to the feed bars and the dogs carried thereby, and t-he .levers 84 and 85 impart a lifting movement thereto.

Upon the inner face of the shuttle' saddle 31, there is secured by means of screws 88 a plate 89, which carries at each side thereof arms 90 and 91 respectively, these arm being bent rearwardly 'and forwardly respectively from the said plate 89. At the ends of the arms there are provided yokes 92 and 93 respectively which engage the grooves 8G and 80 of the levers 84 and 74 respectively.

The lower edge of the plate 89 is provided with a downwardly. extending portion 94, having a yoke 95 which engages the groove 35 of the sleeve 33, which carries the mitre gear 23. saddle 32 there is secured by means of screws .96, a plate 97 having arms 98 and 99, provided at their ends with yokes 100 and 101 which respectively engage the grooves 87 and 81 of the levers 85 and 75. This plate and arms which is shown in detail in Figure 12, is similar to that secured to the saddle 31, with the exception that the downwardly extending portions 94 and 95 are omitted. Upon the outer face ofthe saddle 32 there is secured/by means of screws 102 a plate 103 having a downwardly extending portion 104 thereon provided with a yoke 105, which engages the groove 36 of the sleeve 34 carrying the mitre gear 24. It will thus be seen that upon movement of the shuttle saddles in either direction, the gears 23 and 24 are correspondingly moved, to-

gether with the throat plates, feeding dogs and the operating levers, so that a complete adjustment takesplace by merely moving the shuttle saddles.

In order to bring about the simultaneous and convenient moving of the shuttle saddles toward and away from each other after the same have been loosened by means of the set screwy 63, 1 provide a screw 106 oppositely threadedfrom the center, and passing through lugs 107 and 108 provided on the respective shuttle saddles 31 and 32. This screw 106 is secured centrally thereof to a spiral gear 109, and. supported at its ends upon adjustable bearing screws 110 and 111 mounted in upwardly extending brackets 112 and 113 of a bracket frame 114, se-

To the inner face of the shuttle 1"' cured at its inwardly extending ends 115 plate being looselymovable on'saidbolts, :i

and "116 by screws l117 and 118to the bearing supports 17 and 18, A tubular bearing 119 is provided integrally of the said frame 114, in which is mounted a spindle 19.0 having a knurledhead 121 atits outer end, and provided at its inner end with aspiral gear 122 which meshes with the spiral gear 109 of the screw v106. 'By turning the knurled head 121 in either direction as desiredpthe shuttle saddlesit will be seen, may be simultaneously -and equally moved inwardly towards each other or out #ardly away from each otlieigdueto the opposite threading of the'screw 106, thereby bringing about an accurate and quick adjustment of the entire shuttle and feed mechanism, including the throat plates.

rlhe bearing screws 110 and 111 permit of the accurate preliminary adjustment of the screw 106 by means of a screwdriver or the like, said bearing screws being provided with grooves for this purpose. This adjustment usually takes place in fixing up the machines at the factory, and is permanent thereafter.

"l have illustrated and described a preferred and satisfactory embodiment of my invention,`but it is obvious that changes may be made therein within Lthe spirit and scope thereof as defined inthe appended claims.

l claim:

1. An adjustment means for sewing machines, comprising a plurality of looper hooks, saddles `therefor Ihaving slots, bolts supported by the `frame of the machinevpassing through the slots of the said saddles,V

means-on the said boltssupporting said saddles adjacent to the frame, said means permitting movement of said. saddles, and means for tightening the engagement of said last named means with said saddles to secure the said saddles against movement.

2. Adjustment means for sewing machines, comprising a plurality of looper hooks, a plurality vof saddles therefor having slots, bolts supported by the frame of the machine passing through the slots of the saddles, sleeves on said bolts, a plate having openings through which the bolts pass, said plate being loosely movable on said bolts, a second plate mounted on said bolts in spaced relation to said first namedvplate, and means in said second plate adapted to engage said iirst plate for tightening or loosening the engagement of said first plate with said sleeves to prevent or permit movement of said saddles.

3. Adjustment means for sewing machines, comprising a plurality of looper hooks, a plurality of saddles therefor having slots, bolts supported by the frame of the machine passing through the slots of the saddles, sleeves on said bolts, a plate having openings through which the bolts pass, said second `plate Ymounted on sai db'oltsiin spaced relation to said firstnamed plate,ia set-screw in said second plate adapted to engagesaid first yplate :for tightening or loosening the engagement of Vs aid fir-st plate with vsaid tubular slots toprevent or `permit movement of said saddles. Y

l. Anadjustment means for sewing machines, comprising a plurality of looper hooks, saddles therefor having slots, bolts supported by the iframe ofthe machine .and passing vthrough the slots of the said saddles, means on the said bolts 'supporting said saddles adjacent 'tofthe frame, said means permitting movement of saidsaddles, and means lfor tightening the engagement of said last fnamed means -with said saddles to secure the said saddles against moves ment-@means for operating the looper hooks.

feed dogs, and means carried by Vsaid saddles adapted `to move said operating `means and `said feed dogs with the said saddles.

5. Anadjustment means Ifor sewing machines, comprising -a yplurality of looper hooks, saddles therefor having slots, bolts supported by the frame of the n'iachineand passing `through the slots ofthe said saddles, means on the said bolts-supporting said saddles adjacent to the frame, said means permitting movement of said saddles, and means for tightening the `engagement of said last named means with said saddles to secure the said saddles-against movement, throat plates carried by said saddles and movable therewith, and a'lller `plate adapted to be inserted in contacting relation 'between said throat plates upon theuvariable adjustment of said saddles.

6. Adjustment means for sewing man chines, comprising a plurality of looperhooks, `looper saddles having slots, means for preventing or permitting movement of said saddles, an oppositely threaded screw member having its opposite threads respectively engaging said saddles, and means for rotating said screw member to move said saddles toward or from each other.

7 Adjustment means for sewing machines, comprising a plurality of looper hooks, looper saddles having slots, means for preventing or permitting movement of said saddles, an oppositely threaded screw member having its opposite threads respectively engaging said saddles, a spiral gear secured to said screw member, andA means for rotating said spiral gear to rotate said screw member, rotation of said screw member being adapted to move said saddles toward or away from each other.

8. In an adjustment means for sewing machines, the combination with looper saddles, an oppositely threaded screw having its opposite threads engaging the said saddles, means supporting the ends of said screw, a spiral gear on said screw, and means for rotating said spiral gear and saidA screw, said supporting means for said screw being adapted to be adjusted to place the spiral gear in normal positionrwith respect to its operating means.

9. An adjustmentmeans for sewing machines, comprising a plurality `of looper hooks, saddles therefor having slots, b olts supported by the frame of the machine and passing through the slots of said saddles, means on said bolts for supporting said saddles adjacent to the frame. said means permitting movement of said saddles, means for bringing the last-named means into tight engagement with said saddles to hold the latter against movement, throat plates carried by said saddles and movable therevvith, and means adapted to till the gap between said throat plates upon the variable adjust-ment of said saddles.

l0. An adjustment means for sewing machines,l comprising a looper, a saddle therefor having a slot, a bolt secured to the frame of the machine and extending through said slot, means on said bolt adapted for loose engagement With said saddle to permit adjustment thereof, and means for bringing said .first-named-means into tight engagement with the saddle to secure it against movement.

ll. An adjustment means for sewing machines, comprising a looper, a saddle therefor having a slot, a stationary bolt extending through and beyond said slot, a sleeve on the projecting portion of said bolt, adapted for loose engagement with said saddle to permit adjustment thereof, and means for forcing said sleeve into tight engagement With the saddle to secure it against movement.

l2. An adjustment means for sewing machines,comprising a looper` a saddle therefor having a slot, a stationary bolt extending through and beyond said slot, a sleeve on the projecting portion of said bolt, adapted for loose engagement With said saddle to permit adjustment thereof, an abutment on the side of the sleeve opposite to that on which the saddle is located, a clamping member located on the-bolt between the said abutment and the sleeve, and a pressureexerting connectionbetiveen said abutment and the clamping member to force the sleeve into tight engagement With the saddle to secure the latter against movement.

13. In a sewing machine, two throat plates mounted to be adjusted toward and from each other, and a filler plate adapted to bey inserted in contacting relation between said throatplates upon a particular adjustment of said plates.

l-I. An adjustment means for sewing machines, comprising a plurality of looper hooks, saddles therefor having sliding relation with the frame of the machine, a plurality of means supporting said saddles adjacent to the frame and permitting sliding movement thereof, and singular means adapted to cooperate With said plurality of supporting means to tix said saddles relatively to said frame against movement.

In testimony, that I Claim the foregoing as my invention, I have signed my name.

RALPH M. SI-IARAF.

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