US1237990A - Edge-snipping mechanism. - Google Patents

Description

E. N. ANDREWS.

EDGE SNIPPING MECHANISM. APPLICATION. FILED SEPT-14,1915.

Patented Aug. 21. 1917.

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APPLICATION FlLED SEPT. 14, 1915.

Patented Aug. 21,1917.

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E. N. ANDREWS.

EDGE SNIPPING MECHANISM.

APPLICATION FILED SEPT. 14, 1915.

Patented Aug. 21, 1917.

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E. N. ANDREWS.

EDGE SNIPPING MECHANISM.

APPLICATION FILED SEPT. 14. 1915.

K Patented Aug. 21, 1917.

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Specification of Letters Patent. 1 Patented A11 21, 1917.

Original application an membe s, 1914, serial No; stems. Divided and this application filed September I 14, 1915. Serial 110550311.

To all whom t't may concern:

Beit known thatIQEDwrN N. A nnnnws, a citiz'enof the United States, residlng at FortDodge, inthe county of "Webster and State of Iowa, have invented anew and useful Edge-Shipping Mechanism in Combinati on with an Edge l olding Attachment in a "Sewing-Machine, ofwhich the following is a specification;

The object of my invention is to provide a tape guide and snipping attachment to snip or slit theedge of a shoe upper in combination with a folding attachment to fold the edge of the upper incombination with stitching.mechanism adapted to stitch the folded part with a tape guided and retained therein. The shipping mechanism makesit possible to insert a tape andproperlyfold the snipped edge of the upper at rounded portions thereof, and it is an object of my invention to provide'means forsetting such mechanism in motion andstopping it at the will of theoperator. It is an object of my invention to eliminate the use of cements in connection'with the folded edges of shoe uppers. It is also an objectof'imy invention to do away with the necessityfor having to 'clip or snip incurves by a separate operation. The purpose of the insertion of tape by my attachment is to protect all seams "from breaking and to prevent the top of the shoe from becoming baggy or ill shaped when worn, as the tape will prevent the 'shoe top. from stretching, thereby insuring a snugffit on the foot, and alsogive the shoe the necessary strength to resist the various operations of manufacture. Other objects hereinafter appear.

This application is a division of my -c0- pending application, Serial No. 876,073, filed December 8 191%, directed to the portion of my attachment that performs the folding operation. The accompanying drawmachine coverplate removed; Fig. 3 is a fragmentary View of theedge snipping mechanism; Fig.4 is a perspective showing the mechanism for throwing the edge snipping mechanism into and, out of operative position;Fig. 5 is a detail. ofthe edge snipping knife; Fig. 6 is'a detail of'the eecentric 81 for driving'bracket 90 shown in Fig.1; Fig. 7 is a view of the material folded and also snipped for or to make possible the folding of an incurve; Fig. 8 is a frag mentary view showing the operation of folding and the relative position :of the snipping knife and folding means; Fig. 9 is a vertical section showing the driving feedshown in Fig. 2. which travels in an 'ap proximately circular path and drives memberl in an up-and-down movement dsof an inch. A'fo'lding bar 8 is pivotally attached to member'l by hinge screw 2. A folding bar link 4 is provided having a pin 4 on its upper portion by which it is con nected to collar connection 5. A stud screw 7 connects folding fin'ger 8 to the bifurcated hinge connection Stud screw 7 passes through the lower end of folding bar link 4 and engages in the upper end of hinge connection 15. It also passes through the slot 8 of thefolding finger 8. Folding finger 8 has a sleeve connection with sleeve member9, as illustrated in Fig. 9. Sleeve mem her 9 is attached to feed dog 18, and'is moved from front toward back of sewing machine bypivotally-moving bracket 90. Folding bar 3 reciprocates vertically in bearings 89 which are mounted on the upper end of pivotally-moving bracket 90. Thus bracket 90 moves bearings. 89 from front to back synchronously with the front to back movement of feed dog 18. Sleeve member 9 is connected to feed dog 18 by hinge pin l1 in sleeve hinge bracket 10. Hinge connection 15 is attached to hinge bracket 14 by pin 16, and to feed dog 18 by two screws.

ing finger 8 in its proper position. "Memthe machine.

had. I provide an alternating presser foot here 2 to 16, inclusive, and 18' are all op ed with eccentrically driven mechanism, as

illustrated in Fig.2, causing member 1'to reciprocate vertically g ds of an inch. This operation causes folding finger 8 to travel from right. to left, a like distance, at the Sametime traveling from front toward back of sewing machine, as tape and material into which it is folded is fed toward the back. of the ,sewing machine. Feed dog bridge 19, normallyoapart of thesewing machine, is attached by two screws and is mounted directly under throat plate 20. On it slides the feeding mechanism. Feed dog 18 has an orifice at its right hand end for a screw by which it is attached to the feed actuating mechanism. of the sewing machine. The feeding end of feed dog 18 protrudes upward through throat plate '20. A portion of throat plate20 rests upon and the underside acts as a slide plate for the feeding end of feed dog 18. Consequently, feed dog 18 is limited to a horizontal movement, traveling from front to back. Folding finger 8 simultaneously moves from right to left in its sleeve bearing 9.. A small set screw 17, shown in Fig. 9, engaging pin '16, holds it in place, it in turn securing hinge bracket 14: to hinge connection 15.

I provide a tape guiding presser foot 23,

thelatter not my invention, and which runs through a bushing attached to the frame of A vertical movement only is 27 of original design, illustrated in Fig. 2,

pivotally attached to bar 78 by hinge pin 30 and normally pressed to its lowermost position by a small spring 31. Alternating presser foot 27 isv mounted 011 bar 78 by means of bracket 28 and hinge pin 30, the

' bracket 28 being fastened by bracket screws 29. Tape guiding presser foot 23 and a1- ternating presser foot 27 have an alternate up-and-down movement.

Needle bar and presser bar 78, carrying alternating presser foot 27 travel up .0.

,machine by suitable pivotal means, as at 7 2 and 7 3.

Member 90 is provided with a clamp extension 8&1, which engages rod 83,

which in, turn isengaged by sleeve 82.

Sleeve 82 is engaged with eccentric strap 80. which encircles and is actuated by eccentric 81, driven from the main shaft in the arm of the machine. Thus member 90 .is actuated in a pivotally swinging path from front toward back of sewing machine, thus feeding along the material under the presserfeet, Members 77, 78, 79, 90', 84c, 83,

82, 80 and 81 normally constitute a part of the sewing machine. but are put to a new use byLthei-r combinationwith my attachment.

Feed dog 18 is attached to and actuated by the lower end of the pivotally swinging bracket 90, as illustrated in Fig. 3, screw. 18 being the preferred, fastening means.

. Presser bar 78 with presser foot 27, needle bar 70, and feed dog 18, by reason of their attachment to pivotally swinging bracket 90, move in unison from front to back. Folding bar 3, in bearings 89, is attached to the upper end of pivotally swinging bracket 90, and members 3 to 18, inclusive, all being operatively connected with member 90, move in unison from front to back. Folding bar connection 1, attached to the eccentrically operating mechanism shown in Fig. 2, travels up and down g ds of an lIlClL down, the folding finger 8 moves horizontally from right to left, besides having a front to back path of travel. The folding operation is clearly illustrated in Fig. 8. The desiredwidth of fold is obtained by releasing presser bar 77, at which time presser .foot 23 is adjusted as desired, and by movfolding finger 8 moves from right to left,

and in moving folds the edge of the material operated on, as illustrated in Fig. 8, and holds it there until folding finger 8 and alternating presser. foot 27, with the needle which is traveling toward its lowest point, feeds the material, as it is thus folded, the required length of stitch in a movement toward the back of the machine. At this point presser foot 23 comes into contact with the material; alternating presser foot 27 and also the needle, are raised up and also swung forward preparatory to repeating the operation of descending onthe material. Presser foot 23 moves in its'bearings in a vertical direction only while alternating presser foot 27 with needle bar 70, has a motion which, while the pressure on the material is alternating with presser foot 23, is approximately elliptical, or its path of travel may be described asv backward the length of the stitch, then up and forward, then down. The needle and alternating presser foot 27 have a like motion.-

meato Presser foot 23 is provided with a slotted underthe said presser foot 23 toward the needle, which when the tape is eng ged by the needle, its line of travel is from front toward back, with its right edge forming a. straight line, an adjustable distance to the right of the needle. The material to be foldedenters upon its folding operation by beingplaced under the tape and presser feet with its; edge to be folded extending the desired distance 'to the right of the line of tape, which has; been guided by presser foot23 and engaged by the needle as described, Folding finger 8 having been actuated by the folding mechanism, travels horizontally {toward the adjusted tape line, pressing thefouter edge of the material to befol'ded over thetape. The tape so guided and engagedby'the needle furnishes a substantial and taut adjustable straight material to be folded comes in contact with which screwstinto the sewing machine, its

inner portion forming a bearing to receive hub or hearing end 75 of hand lever 32,

Hub or bearing end 75 is bored out to form a bearing for stud portion 76 of lever 34, with stop pin 59jwhich projects into offset slot 7 4 in the hubcrbearingend75. Thusmem- @ bers 34, 33 and32 are maintained in operative'engagement, Stop screw 57 engages in thilnble bushing 33, as illustrated, to preventunnecessary movement of hand lever 32. provide a spring 35, attached to hand lever 32 and engaging member 36 and projection 36 Spjring'35 operates to press hand lever 32 toward the left of the sewing machine, thus holding hand lever bearing end 75 engaged at offset slot 74 with stop pin 59 to'keep lever 34 in its elevated position, pressingupward against spring 50, and releasing pressure from pawl 41, as will be nnderstood by reference to Figs. 1 and 4. Stopscrew 57 is adapted to engage in the slotted. portion jot lever 32, and thus prevents spring from raising lever 34 and spring 50 more than desiredQ I also provide an auxillary hand lever loclnngmember 86 attached tohand lever 32 and having a hooked "portion adapted to engage with a projecting pin 87 on thesewing machine to retain hand lever 32 in its extreme right hand position, when desired, in which position it causes lever 34 topress downward 'on pawl 41.

Hand lever 32 andauxiliary hand lever locking member 86 'a re attached to each otherby means of a stud screw. (See Fig.

' 86 is provided with a partially coiled spring to retain it in its proper position, and effect engagement with projecting pin 87 at its upper end. The lower end of the auxiliary locking member 86 extends downward slightly out of alinement with lever 32, which lower end on being pressed will release the upper catch portion from engagement withmember 87.

W hen the 'operator moves hand lever 32 to the right portio'n 75 is rotated, and the bott'om of offset slot 74 recedes from its position under stop pin 59. Knife starting lever 34 is operated, pressing pawl 41 downward until that member, depressed also by spring 50, engages with bell crank 44, which is supported by and adapted to oscillate on hinge screw 45. A small pawl spring 43 illustrated in Fig. 2, tends to maintain pawl 41 in its proper place in engagement with member 34. Pawl 41 is pivotally mounted in member 40 by means of pin 55, as illustrated. ember-40 is attached to folding bar connection l by screw 42, member 1 being actuated as hitherto explained and as illustrated in Fig. 2. Member 40 is capable of a frontto-back oscillation of approximately f ths of an inch. I prefer to provide pawl 41 with a beveled face 41 positioned to engage withjand move bell crank 44 from its lowered to its raised position with the for ward movement of the pawl 41, but parting therefrom with the reciprocating movement of pawl 41 toward the back of the sewing machine. The upper arm of bell crank 44 is adapted to engage with the slotted portion of pawl 41 when the latter is in its lowered position. Attached to the lower arm ofbell crank 44 is a link 47 which is operatively connected with stud 46, the lat ter in turn being attached to knife bar 37, as illustrated in Fig. 3. Knife bar 37 is mounted on bracket 39, which in turn is attached to the sewing machine by screws as shown in Fig. 3. I also provide a pinch screw 58 to engage the pinch end of stud 46 to knife bar 37. The lower end of link sired adjustment between members 47 and 48 may be obtained.

A casing 38 for knife bar spring 56 is provided under the lower part of link 47,

is allowedby stop collar 60 on its coming in contact with the bottom of knife bar bracket 39. A cutter block 53 is attached to the table portion of the sewing machine by screw 54, as shownin Figs. 10 and 11.

Edge snipping knife 51, shown in, detail in Fig, 5, is adjustably attached toknife bar 3"! by screw 52, as illustrated in Fig. 3.

In operation the material to be folded is fed under tape guiding presser foot 23 and alternating presser foot 27, with the edge guided up to edge guide 24, the edge to be folded passing over cutter block 53. To put the edge snipping knife 51 intooperation, the operator pushes hand lever 32' to 'the right, Thereupon lever 34. causes the slotted portion of pawl 41 to engage the upper arm of bell crank 44, which through link 47, stud 46, knife bar 37 and edge snipping knife 51 starts the edge snipping operation, knife bar 37 being reciprocated vertically with the, reciprocating motion transmitted to it from bell crank 44, which receives its reciprocating movement from, pawl 41, member 40 and folding bar connection 1, the latter'being actuatedfby eccentrically driven mechanism from the main shaft of the sewing machine. When it is desired that edge'snipping knife 51 stop its operation, the lower end of auxiliary hand lever 86 attached to hand lever 32 is pressed toward the right, which releases hand lever 32. -The latter, which has'been held in its extreme right hand position by auxiliary hand lever locking member 86 en gaging with pin 87, is then returned to its normal position by the action, of spring 35' pressing to the left against it. As hand lever 32 is returned to its normal position, offset slot 74 comes into contact with pin 59 on stud 7 6 of lever 34, raising the startinglever; The latter on being moved into its elevated position causes pawl 41 to release bell crank 44. That member, actuated by spring 56 (through its operative connection with stud 46 andlink 47) may be returned to its elevated and disengagedfposition as related tolpawl41; or if not returned by reason of spring 56 not exerting a sufficient degree of pressurefor this purpose, is returned to the position described by pressure I exerted by beveled face 41 of pawl 41 with the immediately succeeding back toward front movement of that member, bell crank 44 thereafter being retained in this disengaged position by the action of spring 56 through the operatively connected elements above described, until the slotted portion of pawl 41 is again brought into engagement with the upper arm of the crankmember 44.

.It will be observed that the edge snipping mechanism may be thrown intoor out of operation while the folding mechanism is folding operations. It will of course be un= derstoodthat the character of the tape and uppers operated on may vary to any extent; and also that modifications in details of con; struction not constituting a departure from.

able tape guiding means, adjustable means guiding the edge of the material, adjustable rec procating feeding means, means for reclprocating the cuttlng mechanlsm, and

means for engaging and disengaging same from operative position.

I 2. In a sewing machine, a cutting mechanism having avblade arranged transversely to the line of feed and in front of the needle means operated by the main shaft 'of a I sewing machine for actuating same, means for throwlng the cutting mechanism into and out of operatlo-n, and means for looking the cutting mechanism in operative position, substantially as set forth.

.3. In a sewing machine, a cutting mechanism having a blade arranged transversely to the line of feed and in front of the needle, means operatively connected with the sewing machine for vertically reciprocating the cutting mechanism, means for throwing the cutting mechanism into and outof operative engagement withthe actuating means, and edge folding mechanism.

' '4. In a sewing machine, a cutting mechan1sm having a blade arranged transversely to the line of feed andin front of the needle,

means' vertically reciprocating same, edge folding mechanism, means o'peratively connecting the edge-folding mechanism and the cutting mechanism, and means for throwing the cutting mechanism into and out of operative engagement with the edge folding mechanism. I, r

v 5. Ina sewing machine, a cutting mechanism having a blade arranged transversely to the line of feed andin front of the needle, means for adjusting the cuttingmechanism, means for reciprocating the cutting mechanism actuated by the sewing machine, means for I throwing the mechanism reciprocating the cutting mechanism into and out of operation, and means for locking the aforesaid means in or out of operative position.

6. In a sewing'machine, a cutting mechanism having a blade arranged transversely to the line offeed and in front of the needle, means, adapted to'beoperated by the sewing machine for vertically reciprocatingthe cutting mechanism, a knife starting lever, a resiliently pressed pawl actuated by said lever, a bell crank operatively connected with the means for reciprocating the cutting mechanism and adapted to operatively engage with the aforesaid pawl.

7. In a sewing machine, a cutting mechanism having a blade-arranged transversely to the line of feed and in front of the needle,

vertically reciprocable means actuating the v cutting mechanism,=a starting lever, a resiliently pressed pawl actuated by the lever, a bell. crank operatively connected with the vertically reciprocable means for actuating the cutting mechanism and adapted toengage with the pawl, an oscillating member adapted to engage with the bell crank, and means for locking the edge snipping mecha nism in and out of operative position, sub stantially as set forth. 8. In a sewing machine, a cutting mechanism having a blade arranged transversely to the line of feed andcin front of the needle, a projecting guiding portion integral with, and extending substantially beyond the blade, means operated by the main shaft of a sewing machine for vertically reciproeating the cutting mechanism, means for adjusting the cutting mechanism to vary the width of the slit made by it, and means for throwing into and out of operative position the means actuating the cutting mecha nism, substantially as shown and for the purposes described.

9. In a sewing machine, a laterally and vertically adjustable edge snipping knife having its blade arranged transversely to the line of feed and in front of the needle, resiliently'actuated means for vertically reciprocating the edge snipping knife, a lever adapted to throw the last-mentioned means into and out of operative position, resilient means normally retaining the hand lever in inoperative position, and means carried by the hand lever and adapted to releasably retain the hand lever in position to main tain in operative position the means actuating the edge snipping knife, substantially as set forth.

10. In a sewing machine, a hand lever, means for locking it in and out of operative position, a cylindrical bearing portion having an L-shaped slotted part, a thimble bushing mounted thereon, a starting lever operatively engaging the hand lever, a resilient member normally pressing on the end of the starting lever opposite the bearing end, a pawl actuated by the starting lever, a bell crank actuated by the pawl, a link member actuated by the bell crank, means o-peratively connected with the aforesaid link adj ustably supporting an edge snipping knife, and an adjustable edge snipping knife having its blade portion arranged transversely to the line of feed and in front of the needle. V

EDWIN NATHANIEL ANDREWS.

Witnesses:

PHoEBE K. PEELER, M. G. HnLLINes,

tlopies of this patent may be obtained for five cents each, by addressing the Commissioner of retreats, Washington, D. Q.

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