US1013155A - Stitch-forming mechanism. - Google Patents

Description

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Patented Jan. 2, 1912.

3 SHEBTS-SHBET 1.

WITNESSES: Z, lm/Elvrok A TTOR/VEY COLUMBIA PLANOHRAPH (IO-,WASHINCITON, n. c.

A. GRIEB.

STITCH FORMING MECHANISM.

APPLICATION FILED AUG. 30, 1910.

1,013, 1 55, A Patented Jan. 2, 1912.

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' A TTOR/VE Y COLUMBIA PLANOGRAPH C0.,WASHINOTON, n. c.

A. GRIEB.

STITCH FORMING MECHANISM. APPLIOATION rum) AUG. 30,1910.

Patented Jan. 2, 1912.

3 SHEETS-SHEET 3,

UNITED STATES "PATENT OFFICE.

ALFRED GRIEB, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANUFAC- TURING COMPANY, A CORPORATION OF NEW JERSEY.

STITCH-FORMING MECHANISM.

To all whom "it may concern.

Be it known that I, ALFRED GRIEB, a citi- Zen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Stitch-Forming Mechanism, of which the following is a specification, reference being had therein to the accompanying drawings.

This inventionhas for its primary object to provide stitch-forming mechanism, which is complete in itself and adapted for stitching together the marginal portions of overlapping plies of fabric, with means for interweaving with the seam produced thereby a covering thread or threads for binding in the raw edges of the fabric.

The improvement is designed especially for securing together the soles and uppers of Japanese foot wear. known as tabis, such as is shown and described in the United States patent to A. H. DeVoe, No. 949,725, dated February 15, 1910; although capable of other uses involving the binding of the raw edges of fabrics.

In its preferred embodiment, the improvement is applied to a machine provided with primary stitch-forming devices and feeding mechanism suitable for producing straight-away stitching through the body of the work, in which. two thread-carryiug loopers reciprocating transversely of the needle-pathand the direction of feed present loops of their respective covering threads for passage of the needle above and below the work, while an independently moving spreading implement seizes and distends loops of covering thread carried by one of the loopers for passage of the other looper, whereby the upper and lower covering threads are interlooped along the edge of the fabric and other loops of the cover:

ing threads are bound to the upper and lower faces of the fabric by the primary seam stitches. The character of the machine is such 'that.by substitution in the edge-covering mechanism of a non-threaded looper for either or both of the above described threaded loopers the interlooping of different threads at the edge of the fabric may be readily provided for so as to vary the nature of the composite seam produced.

In the accompanying drawings, Figure 1 is an elevation of a lock-stitch sewing, ma-

Specification of Letters Patent.

Application filed August 30, 1910.-

Patented Jan. 2,1912.

Serial No. 579,728.

chine embodying the present improvement, with the frame in vertical section, Fig. 2 a bottom plan view of the same and Fig. 3 a front end elevation thereof with the bedplate in section and the face-plate of the bracket-arm removed' Fig. 4 is a perspective view representing a portion of the needle mechanism and the covering-thread manipulating devices. Fig. 5 is a perspective view of the throat-plate and edge guide. Fig. 6 is an elevation and Fig. 7 a plan of the presser-foot. Figs. 8, 9, 9 10, 11 and 11 are perspective views representing in different stages of operation the several thread-manipulating members, and Fig. 12 is a perspective view representing upon an enlarged scale a section of the composite seam produced by the mechanism of the present improvement.

The machine represented in the drawings embodying the present improvement is of the wellknown Singer oscillating shuttle type, and comprises a frame composed of the bed-plate 1 with overhanging bracketarm including the hollow standard 2 with forwardly extending tubular member 3 terminating in the head 4 with cavity 5 closed by the face-plate 6.

Journaled in suitable bearings in the bracket-arm is the main-shaft 7 having upon its rearward end the grooved pulley 8 and balance-wheel 9, and upon its forward end the takeup cam-cylinder 10 carrying the crank-pin 11 embraced by the split upper end of the pitman 12 whose lower end embraces a stud 13 carried by the collar 13 fixed upon the needle-bar 14 which carries the eye-pointed needle 15.

Coeperating with the needle in the pro duction of alock-stitch seam is the shuttle 16 journaled in the race 17 depending from .the bed-plate 1 and provided with the beak 18 and cast-off member 19. The shuttle has an axial pin 20 upon which is journaled the bobbin-case 21 carrying the bobbin 22 con- 'taining the lower thread supply and provided with the arm 23 entering a holding notch 2a in the shuttle-race. The shuttleactuating rock-shaft 25 has fixed upon its forward end the hub 26 of the shuttledriver 27 which alternately engages the heel and throat of the shuttle in producing the to-and-fro operative movements of the same. The rock-shaft 25 has fixed upon its rearward end the crank-arm 28 having a stud 29 embraced by the laterally extending arm 30 of a rock-shaft 31 suitably journaled beneath the bed-plate and provided with a second lateral arm 32 carrying a stud 33 embraced by one end of the pitman-rod 34 whose opposite end is provided with a strap 35 embracing an actuating crank 36 formed in the main-shaft 7, all as shown and described more fully in the United States 'patent to Miller & Diehl No. 229,629, dated July 6, 1880.

The feeding mechanism comprises the usual serrated feed-dog 37 carried by the feed-bar 38 pivotally connected at one end to upright arms 39 of the feed rock-shaft 4O journaled beneath the bed-plate and provided with the lateral crank-arm 41 pivotally connected to the lower end of a linkbar 42 which is formed at its upper end with a yoke 43 embracing the feed-actuating cam 44 upon the main-shaft. The link-bar 42 carries a fulcrum-stud 45 entering a slideway in the feed-regulating lever 46, substantially as shown and described in the United States patent to P. Diehl No. 388,345, dated Aug. 21, 1888.

At its opposite end the feed-bar has the usual sliding pivotal connection with a lateral arm 47 of the feed-lifting rock-shaft 48 provided at its opposite end with a forked lateral arm 49 embracing the feed-lifting cam 50 upon the intermediate shuttle-actuating rock-shaft 31.

The lower portion ofthe head 4 of the bracket-arm is formed with a seat to which is bolted the bracket 51 having a forwardly projecting arm 52 and a depending and backwardly extending arm 53. The arm 52 of the bracket 51 carries a fulcrum-pin 54 upon which is mounted intermediate its ends the rock-lever 55 formed in its upper portion with the angular cam-slot 56 entered by the roller-stud 57 sustained by the for wardly projecting arm 58 of the collar 13 secured upon the needle-bar 14. The rocklever 55 is formed beneath the fulcrum 54 with a channeled transverse member 59 affording a seat in which is secured by means of the screw 60 a lateral arm 61 of the looper-carrying member to whose stem 62 is secured by means of screws 63 the loopershank 64 carrying the spaced laterally eX- tending looper-blades 65 and 66, each provided in its point with. a thread-eye 67 and the lower looper at its heel with a second.

thread-eye 68. The term looper is herein applied to the looping implement 65 for the reason that such member is employed to present the upper covering thread to the needle and bend it around the latter into a loop which is locked in position upon the face of the work by the needle-thread. In practice, the screw-apertures in the looper-carrying member to accommodate the screws 60 and of which is secured bv means of the fastening screw 72 the shank 73 of the spreader formed with a curved blade 74 terminating in a reflexly bent point or beak 75 between which and the adjacent extremity of the shank 74 is formed a throat 76 to receive the thread seized by the point of the spreader. The other arm 71 of the loopercarrier is provided with a ball-stud 77 embraced by a strap 78 at the upper end of an adjustable pitmanrod 79 passing clownwardly through an aperture l in the bedplate 1 and having at its lower end a strap 80 embracing a ball-crank pin 81 carried by a crank-arm 82 whose hub 83 is fixed to the shuttle-actuating rock-shaft 25 by means of the set-screw 84. To the arm 52 ofthe bracket 51 is secured by means of the fastening screw 85 a thread-guide 86, and a suitably apertured take-up arm 87 is similarly secured to the spreader-carrying arm 71 by means of the fastening screw 88.

As will be seen by reference to the drawings, the cam-slot 56 of the rock-lever 55 has a lower portion which is substantially parallel with the needle-bar in one extreme position thereof, and an upper portion in angular relation therewith, whereby the movement of the roller-stud 57 with the needlebar from upper position causes an initial tinuance of the needles descent and its ascent to the same position. The timing of the spreader-actuating mechanism is such that in the retracted position of the loopers, the spreader advances and seizes the thread of the upper and longer looper 65 and retires again previous to the advance of the loopers, whereby it forms and distends a loop of the upper looper-thread which is entered by the lower looper 66 in its advance to present its own loop for entrance of the needle. While the needle is within the upper looper-thread loop above the work and the lower looperthread loop beneath the work, the shuttle seizes a thread-loop from the needle and casts it about its own thread while the needle is ascending, whereby not only are the looper threads enchained at the edge of the work, but each is secured to its respective face of the work by the needleand shuttle-threads when the stitch is set by the usual means,

including the take-up arm 89 actuated by spool 90 mounted upon the spool pin 91 upon the bracketarm 3 and is led through the guide-notch 92 at the top of the face-' plate 6 downwardly around a tension device at 93, upwardly through the eye of the takeup lever 89 and downwardly to the needleeye; and the shuttle-thread?) passes upwardly from the thread-case 21 directly to the lower face of the work. Theupper covering thread 0 is led from the supply spool 94 upon the spool-pin 95 carried by the bracket-arm 3 through the guide-notch 96 formed at the top of the faceplate 6 and downwardly through the tension device 97, and thence through the eye of the take-.up arm 87 and the stationary guide 86 to the point of the upper looper from which it passes to the work. The lower covering thread d is led from the supply spool 98 upon the spool pin 99 fixed in the bed-plate,

through the tension device 100 and into the guide-eye 68 at the heel of the lower looper from which it passes through the eye 67 in the point of said looper to the work. The throat-plate 101 is shown provided with the usual feed-dog opening 102 and with the needle aperture 103 having a lateral slot 103 connecting it with the laterally extending looper-clearance slot 104 which registers with the recess 105 formed in the upper side of the bed-plate to accommodate the spreader.

The presser-foot is provided with the usual slotted shank 106 secured by means of the clamp-screw 107 to the reduced lower end of the presser-bar 108, and its foot portion 109 is formed upon the side toward the loopers with a lateral notch 110 overhanging which is the stitch-finger 111 formed upon a plate 112 Set into a recess in the top of the presser-foot and. secured therein by means of the screw 113; the finger 111 being arrangedslightly at the left of the path of the needle as seen in Fig. 4:. To the top of the foot-- plate 109, adjacent the bottom of the shank 106, is secured by means of the fastening screw 1141 a shield-plate 115 with slightly upturned forward portion 116 affording an overhanging lip spaced slightly above and in advance of the point of the stitch-finger 111. Overlying the throat-plate at the right and in advanceof the needleaperture 103 is an edge-guide comprising the shank 117 with screw-apertures 118 to receive fasten ing screws to secure it to the bed-plate and formed at its forward end with upturned portion provided with the standing guidemember 119 with rearwardly projecting finger 120 extending to a position about op- .posite the needle apertur Y As represented more particularly in Fig. 8, the guide-finger 120 is made of taper form with its upper edge downwardly and forwardly inclined, so that the upper covering thread laid over it by the looper will readily slip off the same and the taper stitchfinger 111 when the thread is drawn up,

whereby such thread is caused to assume a position substantially perpendicular to the edge of the fabric to insure uniformity in the composite covering seam.

In the operation of the machine, the needle and shuttle, in conjunction with the feed "mechanism, operate in the usual way to produce upon the overlapped marginal port-ions of the superposed plies of fabric 911. and m a straight-away lock-stitch seam a b (Fig. 12) regardless of the presence or absence of the edge-covering threads 0 and d. When the loopers 65 and 66 are threaded up as before described, their respective threads are looped around the needleand shuttle threads and interlooped with each other as further represented in Fig. 12.

The upper thread-handling members are represented in Fig. 11 in their initial position, wherein the needle 15 is raised; the loopers 65 and 66 are retracted to nearly extreme position and the spreader is approaching nearly extreme advance position intermediate the needle-path and the beak of the looper 65 In this position, assuming that a series of stitches has been previously formed, as represented, the needlethread a extends from the last needle-puncture in the work upwardly through the needle-eye to the source of supply, and the shuttle-thread b occupies its normal position between the thread-case 21 and the said needle-puncture in the work. The upper covering thread 0 extends from the purl formed by the interlooping of the covering threads upon the edge of the material inwardly beneath the needle-thread a of the last stitch and beneath the stitch-finger 111., across the spreader-beak 7 5, to the eye of the looper 65 and thus through the eyes of sitions, and the spreader moves to its extreme dotted line position as represented in Fig. 11 and beglns its return movement,

seizing an upper covering thread 0 between the looper-eye and the stitch-finger 111, and drawing the thread slightly downward into contact with the inclined upper edgeof the g'uide finger 120, as represented in Fig. 8.

At this period of the stitch formation, the needle-thread loop from the last needle- .puncture in the work is cast off by the shuttle, but is not drawn up to set the stitch until somewhat later, but the needlethread from the preceding stitch lying upon the face of the fabric is not disturbed by the action of the spreader upon the upper-covering thread 0, for the reason that the latter, as it comes from the edge of the fabric beneath such needle-thread, extends around the stitch-finger 1.11, so that the pull upon the thread 0 is inward from the edge and substantially parallel with the face of the work. As the loop of-covering thread 0 around the stitch-finger is drawn taut by the receding spreader, the inclined edge of the stitch-finger causes it to slide forwardly beneath the lip 116 of the shield-plate 115 which has previously confined the slackened covering thread thereon, and the inclined upper edge of the guide-finger 120 performs a similar oflice in depositing the limb of the covering-thread loop resting thereon upon the face of the work. As the points of the stitch-finger 111 and the guide-finger 120 are substantially opposite each other, it will be seen that the covering thread will be delivered therefrom substantially at right angles with the edge of the work, so as to insure uniformity in the laying of the threads in succeeding stitch-forming cycles.

As the spreader continues its receding movement to distend the loop of upper covering thread 0, and the needle continues its decent and the loopers and 66 advance to loop-presenting position, the lower looper passes through the distended loop of upper covering thread, as represented in Fig. 10, and the take-up arm 87 advances to give up slack for the loop-distending action of the spreader. The needle passes between the blade of the looper 65 and its thread 0 and penetrates the work while the loopers are still advancing, the lower looper arriving at looppresenting position just before the point. of the needle encounters the same, and the loopers remain in advance position while the needle continues its approach to and a slight recession from extreme lower position for presentation of its loop to the shuttle which seizes and casts it about the thread-case while the needle continues: its up-stroke. While the loopers are still in advance position, the spreader advances and the take-up arm 87 recedes to maintain the covering thread 0 taut, and as the spreader-beak passes the rearward edge of the lower looper 66, its loop of upper covering thread is stripped off the same by contract with the lower looper, as represented in Fig. 9, and is drawn up and set by the subsequent action of the spreader in seizing and distending a new loop of the thread 0.

As represented upon an enlarged scale in Figs. 9 and 11*, the eyed extremity of the upper looper 65 is specially formed to facilitate the engagement of its thread upon opposite sides by the needle and the spreader, respectively. At its outer end, the looperblade 65has an enlargement 65 affording an offset upon the needle side thereof, and the thread-eye 67 terminates in a transverse slot 67 at the outer extremity of its enlargement. When the looper is in advance position, the lead of its thread is backward from the looper-eye to the edge of the fabric, and the thread thus extends from the end of the slot 67 on the needle side of the blade 65, as represented in Fig. 9*, so that ample space is allowed for descent of the needle between the blade 65 and the portion of the thread. 0 leading therefrom to the work; but when the looper is in retracted position, as represented in Figs. 8, 11 and 11 the lead of the thread between the looper-eye and the work is around the stitch-finger 111 and in advance of the taut needle-thread, which serves in addition to the lip 116 of the shieldplate 115 to retain it upon the stitch-finger, and the thread therefore extends from the opposite end of the slot 67 to the threadfinger 111 and in a position intersecting the path of movement of the beak 75 of the spreader, which wipes past the same in moving to extreme position, as represented in Fig. 11, and engages the same with certainty upon its return movement, as represented in Fig. 8.

The present improvement differs from others in various ways among which may be mentioned the following: The loopers carrying and serving to interloop the covering threads cooperate with the stitch-forming devices producing the primary seam only in presenting loops of the covering threads to be fastened to the opposite faces of the work by the primary seam while forming no necessary part of the latter. The coveringthread loopers, although cooperating with the primary stitch-forming mechanism both above and below the throat-plate, are supported upon a common fulcrum and are actuated by mechanism wholly above the throatplate. In the present embodiment of this improvement, the actuation of the spreader from the shuttle-actuating rockshaft serves to impart to the spreader an idle retractive movement intermediate its loop-shedding action and the seizure and distension of a new loop, but it is evident that this intermediate movement has no necessary function as regards the present invention, and may be avoided by the employment of any usual or suitable cam-actuated mechanism. Not only is the covering-thread mechanism constructed and actuated in a different manner from edge-covering mechanism heretofore devised, but it involves the production of a new product; and it is therefore to be understood that the present invention is not limited to the specific construction and arrangement of parts herein shown and described, but is susceptible of considerable variationirom the present embodiment within the scope of the invention.

Having thus set forth the nature of the invention what I claim herein is 1. In a sewing machine, the combination with stitch-forming mechanism comprising a reciprocating needle and a loop-taker cooperating therewith to form a seam, of a plurality of loopers also cooperating with said needle respectively above and below the work, one of which loopers is eye-pointed to carry and present to the needle loops of a' covering thread, and means independent of said loopers whereby loops of thread carried thereby are enchained with each other.

2; In a sewing machine, the combination with stitch-forming mechanism comprising a reciprocating needle and a loop-taker co operating therewith to form a seam, of a plurality of eye-pointed loopers cooperating with said needle respectively above and below the work, and ,means independent of said loopers whereby loops of thread carried thereby may be enchained with each other. 3. In a sewing machine, the combination with stitch-forming mechanism comprising a reciprocating needle and a loop-taker cooperating therewith to .form a seam, of a plurality of loopers mounted upon a common carrier and adapted to cooperate with said needle respectively above and below the work, and means independent of said loopers whereby loops of thread carried thereby may be enchainedwith each other.

4. In a sewing machine, the combination with a reciprocating needle and a loop-taker cooperating therewith to form a seam, of a looping implement. formed with two eyepointed looper-blades adapted to cooperate with said needle respectively above and below the work, a spreader for seizing and distending loops of thread, of one of said looper-blades for passage of the other blade through the same, and independent actuat ing means for saidlooping implement and the spreader.

5. In a sewing machine, the combination with a reciprocating needle and a loop-taker cooperating therewith and complemental thereto in the production of stitches, of a plurality of loopers each adapted to present loops of edge-covering thread for passage of the needle respectively above and below the work, and a spreader cooperating with said loopers for seizing anddistending loops of one covering thread for passage of loops of the other covering thread 6. In a sewing machine, the combination with the throat-plate and stitch-forming mechanism comprising a reciprocating needle and a loop-taker cooperatingtherewith plate in presenting thereto loops of covering 79 thread and both mounted upon a support above the throat-plate, and means cooperating with said loopers for efiecting the enchainment with each other of loops of said covering thread independently of those presented to the needle.

7. In a sewing machine, the combination with the throat-plate and stitch-forming mechanism comprising a reciprocating needle and a loop-taker cooperating therewith 80 and complemental thereto in the production of stitches, of upper and lower coveringthread loopers cooperating with said needle respectively above and below the throatplate in presenting thereto loops of covering 35 thread, a common fulcrum sustained above the throat-plate in transverse relation with the needle-path and upon which said loopers are mounted, and means cooperating with said loopers for effecting the enchainmentof loops ofsaid covering thread independently of those presented to the needle.

8. In a sewing machine, the combination with they throat plate and stitch-forming mechanism comprising a reciprocating needle-bar carrying a needle and a loop-taker cooperating with said needle and complemental thereto in the production of stitches, of upper and lower covering-thread loopers cooperating with said needle respectively above and below the throat-plate in presenting thereto loops of covering thread and both mounted upon a support above the throat-plate, cam-actuated means operatively connected with the needle-bar and also arranged wholly above the throat-plate for imparting tosaid loopers their operative movements, and means cooperating with said loopers for eflecting the enchainment of loops of said covering thread independently of those presented to the needle.

9. In a sewing machine, the combination with a reciprocating needle and a loop-taker cooperating therewith and complemental thereto in the production of stitches, of a plurality of reciprocating loopers each adapted to present loops of edge-covermg threadfor passage of the needle respectively above and below the work, a spreader cooperating with said loopers for seizing and distending loops of one covering thread for passage of loops of the other coverlng thread, a rocking carier upon which sald passage of loops of the other covering thread, a rocking carrier upon which said spreader is mounted, and a take-up arm mounted upon said rocking carrier and engaging the covering thread acted upon by the spreader to maintain the same taut dur ingthe spreader action thereon.

10. In a sewing machine, the combination with stitch-forming -mechanism comprising a reciprocating needle and a looptaker cooperating therewith and complemental thereto in the production of stitches, and feeding mechanism for advancing the work to space the stitches, of a plurality of eye-pointed loopers reciprocating transversely of the direction of feed and adapted to present loops of edge-covering thread for passage of the needle respectively'above and below the work, a spreader having reciprocatory operative movements also transverse to the direction of feed and cooperating with said loopers for seizing and distending loops of the covering thread of the upper looper for passage of the lower looper, and a stitch-receiving finger arranged substantially in the direction of feed adjacent the needle-path and beneath and around which the upper covering thread is led by its respective looper preparatory to each action of the spreader.

11. In a sewing machine, the combination with stitch-forming mechanism comprising a reciprocating needle and a loop-taker cooperating therewith and complemental thereto in the production of stitches, and feeding mechanism for advancing the work to space the stitches, of a plurality of eyepointed loopers reciprocating transversely of the direction of feed and adapted to present loops of edge-covering thread for passage of the needle respectively above and below the work, a spreader having reciprocatory operative movements also transverse to the direction of feed and cooperating with said loopers for seizing and distending loops of the covering thread'of the upper looper for passage of the lower looper, an edge-guide formed with a taper guidefinger disposed in the direction of feed at one side of the needle-path beneath the path of movement of the upper looper and terminating substantially at one side of the needle, and a taper stitch-receiving finger extending in the direction of feed and terminating at the opposite side of the needlepath beneath the path of movement of the upper looper.

12. In a sewing machine, the combination with stitch-forming mechanism comprising a reciprocating needle and a loop-taker cooperating therewith and complemental thereto in the product-ion of stitches, and feeding mechanism for advancing the work to space the stitches, of a plurality of eyepointed loopers reciprocating transversely of the direction of feed and adaptedsto present loopsof edge-covering thread for passage of the needle respectively above and .below the work, a spreader having reciproca- 'tory operative movements also transverse to the direction of feed and cooperating with said loopers for seizing and distending loops of the covering thread of the upper looper for passage of the lower looper, a stitchreceiving finger arranged substantially in the direction of feed adjacent the needle path and beneath and around which the upper covering thread is ledby its respective looper preparatory to each action of the spreader, and a shield having a threadengaging lip disposed adjacent the needlepath and transverse to the direction of" feed and overhanging the point of said stitchreceiving finger.

13. In a sewing machine, the combination with the throat-plate, stitch-forming mechanism comprising a reciprocating needle and a loop-taker cooperating therewith beneath the throat-plate, and feeding mechanism for advancing the work to space the stitches, of an upper looper movable above the throat-plate transversely of the direction of feed and in front of the needle path with its extremity laterally offset toward the needle-path and provided with a needlehole terminating in a transverse slot at the extremity of the looper, a lower looper cooperating with the needle beneath the throat-plate and movable transversely of the direction of feed, a spreader also reciprocating transversely of the direction of feed and moving in a path adjacent the upper looper and on the opposite side thereof from the needle and adapted to seize and distend thread loops of the upper looper for passage of the "lower looper, and means for actuating the several thread-handling elements. 7 V

14. In arsewing machine, the combination ,with the throat-plate and stitch-forming senting thereto loops of covering thread, a

spreader cooperating with said loopers for seizing and distending loops of one cover-' ing thread for passage of loops of the other covering thread, actuating means for said needle, means driven by the needle-actuating means .for imparting operative movements to said loopers, a rock-shaft from which the loop-taker derives its operative movements, and an operative connec tion between said rock-shaft andthe spreader for imparting operative movements to the latter.

15. In a sewing machine, the combination with a reciprocating needle and a looptaker cooperating therewith and complemental thereto in the production of stitches, of a plurality ofloopers each adapted to present loops of edge-covering thread for passage of'the needle respectively above and below the Work, means for effecting the en- In testimony whereof, I have signed my chainment of loops of covering thread indenamev to this specification, in the presence pendently of those entered by the needle, of two subscribing Witnesses.

and actuating means for said loopers and ALFRED GRIEB. 5 enchaining means from which each derives Witnesses:

an operative movement in the same path for HENRY J. MILLER,

every reciprocation of the needle. HENRY A. KORNEMANN, Jr.

Copies of this patent may be obtained f or five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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