US526470A - vannette - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1.

J. VANNETTE. $EWING MACHINE.

No. 526,470. I Patented Sept. 25. 1894.

(No Model.) 3 sheets-sheet 2.

J. VAN'NETTE. SEWING MACHINE.

No. 526,470. Patented Sept. 25, 1894.

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(No Model.) 3 Sheets-Sheet 3.

J. VANNETTB; SEWING'MAUHINE.

No. 526,470. Patented Sept. 25, 1894.

THE norms Perms co. Puma-urns" yvnsumurcu. b, c,

UNITED STATES PATENT OFFICE. r

JASPER VANNETTE, OF TIFFIN, OHI O, ASSIGNOR OF ONE-HALF TO 0. J. YINGLING AND GEORGE SIY INGLING, ()F PLACE.

sPEotrIcA'rxoN forming part of Letters Patent No. 526,470, dated September 25,1s94. Application filed October 7,1893} serial No. 487,495. (No model.)

To all whom it may concern: Be it known that I, JASPER VANNETTE, a

in the county of Seneca and State of Ohio, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to that classof lock stitch sewing machines in which the needle thread is carried around the lower or looking thread, supplied from a bobbin held in a bobbin case, by a circularly moving hook; the object of my invention being to provide a ma chine of this class which will run lightly and noiselessly, and which willbe adapted to run at high rates of speed.

In carrying my invention into effect the circularly moving or gyratory hook which catches the loops of needle thread is carried at the end of alever which is preferably made tubular and which is hung upon pivots at right angles to each other to form a universal joint so that the said-lever may be free to move in different planes permitting its forward end, at which the loop-seizing hook is located, to travelina circular path, the said lever having at its rear end an arm entering a suitable opening 'or socket formed in a crank carried by a rotating shaft located below the work plate .of the machine and operated from a driving shaft journaled in the upper part of the arm of themachine through any suitablewell known connections.

Within the tubular hook-carrying lever is placed a sliding shaft or plunger provided at its outer end with a hook which, as the hookcarrying lever operates, is caused to travel toward and from the loop-seizing hook in such a manner that the spreading hook will be" housed within the loop-seizing hook when the latter takes a loop of needlethread, but will travel away from the said loop-seizing hook when the latter moves from the top to the bottomof the bobbin case, thereby spreading the loop of needle thread laterally so that it will be carried around a relatively thick bob bin case, with but little friction on the latter, the'sliding movements of the plunger carrying the loop-spreading hook being derived from the vibratory movements of the lever I f carrying the loop-seizing hook. citizen of the United States, residing at Tifiin,

The bobbin case with its contained bobbin is sustained by a suitable skeleton frame or bobbin-case supporter w'hichis provided with shoulders. for disengaging the loops of needle thread from the loop-seizing and spreading hooks at the proper times; and, co-operating with saidhooks, to insure the passage of the loops of needle thread around the bobbin case, is a gyratory orcircularly moving looppushe'r which, after a loop of needlethread has been disengaged from the loop-seizing and I spreading hooks, engages the loop positively and carries] it around ,past the center of the bobbin case on the under side of the latter.

The bobbin-'casesupporter is preferably carried by a lever mounted upon a universal joint and operated by an eccentric on the lower-rotating shaft insuch a manner as to c'ausethe said bobbin supporter to travel in a circular path in a direction opposite to the movement of the gyratory or circularly moving hooks which carry the needle thread around the bobbin-case and bobbin, this movement of the bobbin supporter lowering the bobbin-case so as to give plenty of room for the circularly moving hooks to pass above it when a loop of needle thread is to be taken, and then lifting thebobbin-case so as to bring it relatively close to "the under side of the work-plate when the said hooks pass beneath it to carry a loop-of needlethread around it, these movements of the bobbin-supporter en abling the bobbin-case to be encircled with a smaller loop of needle thread than wouldbe.

required were the bobbin-supporter stationary, while the descending movement of the bobbin-supporter pulls a slight amount of slack thread from the bobbin for theformation. ofthe next succeeding stitch.

.In the accompanying drawings Figure 1 is asectional side view of a sewing machine embodying myinvention, and Fig. 2 is a bottom view thereof. Fig. 3 is a front end view of the lower part of the machine looking from the left in Fig. 1. Fig. 4: is a detail section to show the axes of thegyratory levers. Figs.

5 and 6 are detail sectional views in different positlons of the tubular hook-carrying lever,

showing the spreading-hook plunger working therein. Fig. 7 is a detail section on line 7-7 Fig. 1, and Figs. 8 to 13, inclusive are details.

A denotes the arm, and a the work-plate of the machine.

Journaled in the upper part of the arm A is the main rotating driving shaftB provided at its forward end with a crank I) connected by a link I) to the needle bar 0 carrying the usual eye-pointed needle 0. The shaft B is also provided with a crank 13 connected by the pitman-lever b with a slotted crank arm (1 formed on the rear end of the rotary shaft D journaled beneath the workplate of the machine and provided at its forward end with a crank arm d having a suitable socket or recess which is entered by an arm f of the tubular hook-carrying lever F, the latter bein g provided at its forward end with the loopseizing hook f.

The lever F is provided with a vertical axis pin f fitted for easy movement within a rocker G hung to the lugs a depending from the work-plate a by horizontal pivots or center screw g which are at right angles to the axis or pivot pin f? of-the lever F. By thus mounting the lever F on two axes or pivots which are at right angles to each other it will be obvious that said lever is capable of universal movement, so that by operating its rear end from the rotary crank 01 a gyratory or'circular movement will be imparted to the forward or hook-carrying end of the said lever to carry the hook around the bobbin case and bobbin.

Mounted within the tubular lever F, so as to have a free sliding movement back and forth therein, is the plunger H provided at its forward end with the loop-seizing hook it, and having, above the rocking block G, the arm h terminating at its upper end in a ball or rounded portion 72. fitting in a suitablesocket on the under side of the bed-plate a, this socket forming a resistance point which will cause the plunger H to slide back and forth in the lever F as the latter vibrates vertically in performing its circular movements,

the loop-seizing hook so as to spread the loop of needle thread laterally in such a manner that-it Will readily pass around the relatively thick bobbin-case I., The lever F is provided in its upper side with a slot through which the arm h on the plunger I-I extends, said arm working in said slot as the said plunger slides back and forth in the lever F when the latter is in operation. The said bobbin case I, (which carries a disk bobbin of ordinary construction from which the lower or looking thread is supplied,) is loosely held between two separated rings 2" and i which constitute the bobbin-case supporter, the ring t" being connected to the ring 2' by the arm or movement to the opposite ends of the lever J so as to cause the bobbin supporter carried at the forward end thereof to travel in a circular path, and the said eccentric being so arranged that this movement of the bobbin supporter will be in opposition to the gymtory or circular movement of the forward end of the hook-carrying lever F. This result is effected by so arranging the eccentric d that its throw is directly opposite to the throw of the crank arm 01 on the shaft D. (See Fig. 7.)

To the ring 12 forming a part of the bobbin supporter, is hinged the ring L which may be so swung aside for the insertion and removal of the bobbin case with its contained bobbin, the said ring, which serves as a swinging gate, being held closed by means of a turning button, or other suitable latch. Between the ring 2' of the bobbin-supporter and the upper portion of the swinging gate L, which serves to hold the bobbin therein, is left a slight recess at t' which prevents the catching of the bobbin thread by the said gate when the latter is closed. The ring '6 of the bobbin supporter is provided at its upper side with a projection i in which is formed a recess 11 entered by a projection or arm on the bobbincase, this construction of these parts serving to hold the bobbin case stationary.

The bobbin case I is provided with a central sleeve i on which the bobbin m is journaled, said bobbin-case being provided with a suitable tension device shown, in the present instance, as the tension arm a the outer end of which bears against a projection 2' formed on the bobbin case'and between which arm and projection the bobbin thread passes. The tension arm n is yieldingly pressed against the projection 2' on the bobbin case by a small coil spring n surrounding ascrew n extending Within said sleeve i said screw being provided with a nut n having a small lug entering a slot 01 in the sleeve 2' to keep said nut from turning when the screw n is turned to regulate the tension, the head of said screw bearing-against the tension arm n.

The bobbin supporter is provided with the cast-off shoulders 2' arranged on the lower front side of the bobbin case and in such relation to the loop seizing and loop spreading hooks f and h'that as the said hooks pass around beneath the bobbin supporter. the two parts of a loop of needle thread held thereby t 826,470 I v s i will be disengaged from said hooks by reason of the contact of the thread with said shoulders.

5 f and h, when the latter are separated from each other, with a loop pusher f which engages the loop of needle thread after it has been dropped by the said hooks and forces it positively around beneath the lower side of the bobbin case so as to insure its forward passage aroundthe latter, thereby preventing any possibility of the loop being drawn backward by the take-up when the latter comes into operationto draw'up the loop and tighten the stitch.

The bobbin case I is provided with a circumferential slot or recess 2' which permits the point of the loop pusher f to enter slightly within the outer circumferenceof the said bobbin-case, and thus insures a proper hold onthe loop of thread by the said thread pusher until the latter has passed far enougharound the bobbin case to permit the take-up to draw up the loop, this latter operation disengaging tlreloop from theloop pusher.

I have incidentally shown in connection with that part of the sewing machine to which my invention more particularly relates a feeding mechanism, but as 'the latter forms no part of the present invention and as it is not herein claimed it need not nowbe described.

In the operation of my machine the needle descends, and as it rises and throws out a loop in the usual manner the loop is taken by "the hook f carriedat the forward end of the gyratory lever F, the loop-spreading hook it being at this time housed within a suitable recess or opening formed in the'said hook f.

sal joint, afforded by the two pivots at right angles to each other on which the said lever is hung, the forward end ofsaid lever is caused to travel in a circular path so that the loop of needle thread is 'carried'around the bobbin case held in thebobbin supporter,

and as the loop-seizing andloop-spreading hooks travel aroundfrom their uppermost to their lowermost positions, the latter hook is caused to recede from the former thereby spreading theloop of needle thread laterally so that it readily passes around the relatively thick bobbin case held in the bobbin-supporter, this spreading of the loop preventing undue friction on the needle thread. When the hooks f and 71 have reached a position about central beneath the bobbin case the loop of needle thread is drawn across the shoulders i formed on the bobbin supporter and are thereby disengaged from the said hooks, the latter both pointing toward the right in Fig; 3 ortoward the point of view in Fig. 1, so that the loops can thus be readily disengaged therefrom. The loop of needle thread after being released from the hooks f and h is engaged by the loop pusher f carried by the lever and is thereby posi- The lever F is provided between the hooks "out the co-operating loop-pusher. In the operation of thelever F on its univertively forcedaround beneath the center of the bobbin case so as to be in position to be drawn up by the take-up when the stitch is tightened. The bobbin-supporter carried by the lever J has meanwhile been moving in a circular path in opposition to the movements of the forward end of the lever F and the hooks carried thereby, the said bobbin supporter being lowered when the hooks are in their loop-seizing position, so as to give plenty of rooin for the hooks to pass above the same, and being lifted when the hooks are beneath the same so as to permit the bobbin tobe encompassed by, a smaller loop than would otherwise be possible, the lowering movements of the bobbin case drawing a small amount of slack from the bobbin thread for the formation of the next succeeding stitch andthe co-operating opposite movements of the hooks and bobbin supporter insuring the proper formation of stitches at highrates of speed. t 1 1 v I do not wishto be understood as limiting my invention to the details herein shown and described, as these may be varied within the province of mechanical skill without departingfrom the spirit of my invention; also certainparts of my invention may be employed without using certain. other parts. ll orexample, the gyratory loop pusher might be used in connection with a stationary bobbinsupporter and bobbin-case instead of with the movable bobbin-supporter herein described, and the feature of the cast-off shoulders on the bobbin supporter, for disengaging .the loops ofneedle thread from the gyratory hooks, might be employed .with a stationary bobbin-supporter or, in somelinstances, with- Having thus described .my invention I claim and desire to secure by Letters Patent-- t t 1. I asewing machine, the combination with a needle bar and needle and their operating mechanism, of a bobbin-supporter, a bobbin case and bobbin sustained by the latter, loop-seizing and loop-spreading hooks, means for imparting a continuouscircular movement to said hooks for. the purpose of carrying the needle thread around the bobbin case and. bobbin, means for moving said loopspreading hook from and toward said loopseizing hook, laterally, and a circularly moving loop pusher serving to insure the passage of the loops of needle threadaround the bobbin case after said loops are disengaged from said hooks.

2. In a sewing machine, the combination witha needle bar and needle and their operating mechanism, of a bobbin supporter, a bobbin case sustained by the latter and provided with a circumferential slot or recess, a

case, and a movable loop pusher co-operating with said hook, and serving to insure the passage of loops of needle thread around thebob- 1 universal-jointand provided at its outer end in'g'into the said circumferential opening or 1 'rrecessinithe bobbin-case so as tobewithin the;

. outer circumference of the latter.

bin case, the point of said loop-pusher extend- In a'sewing machine,the combination with a ncedleibar and needle and theiroper ating-mechanism; of a loop-seizing hook, a

- bobbin supporter, abObbincase and wbobbin sustained by the latter,:means for imparting 'means'for imparting circular movements to; l "the said bobbin supporter in opposition to the -circular'movements'of the said hook, I

circular. movements to the said-:hook and 4." Inza sewing machine, the combination with a needle and its operating mechanism, of

I a circularly movingloop-seizinghook and, a

co-operating loop-spreading hook, and a bobbiin supporter provided with disengaging 6. In a sewingmachine, the' combination 1 flpartsor'shoulders for releasing-the loops of needlethreadfrom said hooks.

' 5. :In'asewing machine, the combination,

with a needle bar-and needle and their oper ating mechanism, of a circularly moving loop;

seizing: hook, a 'co-operating lOOprs-preadinghook, a bobbin supporter providedwith dis-. engaging shoulders for releasing the loops of needle thread "from said hooks, and a looppusher' movingtwith said hooks and serving.

xto carry the loops of needle thread forward after having been released from-said hooks.

with a needle'bar and needle-and: theiroper-- Eating mechanism, of-.a"bobbin supporter, a bobbin case'and: bobbin sustained bythelatter, a tubular gyratory lever mountedlon a with a loop-seizinghook, and a-plunger fitted- 7 with a needle bar and needle and their operating mechanism, of a bobbin supporter, a

to slide within the-said gyratory lever and provided at its outer end with a loop spreading hook. t 7. In a sewing machine, the combination :bobbin case and bobbin sustained by the latter, a tubular gyratorylever mounted on a universal joint and provided at itsouterend with a loop-seizing hook, a'plungerfitted to slide within the said gyratory lever. andpro- Y videdat its outer end withialoop-spreading 5 -'rigid. upwardly extending-arm :having a 'hook,said' plunger being provided :-with a rounded-or ball-like termination, and a stationary socket into which saidarmfits;

8. Inasewing machine, the combination with a needle bar and needle and their operthe rounded end of ating mechanism,.of a lever, as J, having a universal joint and carrying at its forward end a bobbin supporter, a rotating. eccentric for operating said lever, a bobbin. case and bobbin sustained by said, supporter, a gymtory lever, as. F,- also mounted upon a uni- Versal joint and provided at its forward end with a loop-seizing hook, means for imparting gyratory'movementsto saidlevers,jand aloop-spreading hook movable toward and from the said loop-seizing hook and co-operating with the latter, substantially as set forth.

9. In a sewing, machine, the combination with a needle bar and needle and their operating mechanism, of a'lever, as J, having a universal joint and carrying at its forward adjacent to said hook, means for imparting .gyrator'y movementsto said levers, a loopspreading hook movable toward and from the said loop-seizing hookand co-operating with the latter, substantially as set forth.

10. In a sewing machine, the combination with a needle bar and needle and their operatingmechanism,'of .a skeleton bobbin supporter consisting of the. rings iand i and the connecting-arm orbridge 2 a bobbin case and bobbin sustained by said bobbinvsupporter, a swinging gate consistingof the ring -L; hinged to the said ring 1' and adapted to be swung .aside for the insertion or removal of the bobbin case, there beingv between-the up- .per-portionof the said gate and the said ring 4 a recess or space?? to prevent the catching of the bobbin thread between the said ring 1' and the said gate when, the latter isvclosed. In testimonyvwhereof I affix, my signature in presence. of two witnesses.

- 'J SPER VANNETTE Witnesses: w a t HENRY CALVER.

4 CASSIE M. SWEENEY.

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