US1170666A - Combination thread-drawing and hemstitch sewing-machine. - Google Patents

Description

- W. N. PAHKES. COMBiNATIN THREAD DRAWING AND HEMSTITCH SEWING MACHINE. APPLICATmN FILED APR.19.1909.

1,170,666. Patented Feb.8,1916.

3 SHEETS-SHEET l APPLICATION FILED APR. I9, I909.

W. N. PATINES.i COMBINATION THREAD DRAWING/IND HEMSITITCH SEWING MACHINE.

i ...Il III.- I III Q IIII I' In i IIE Il IIj IQQ N@ I` y I II @I 'i Patented Feb, 8, 19H5.

3 SHEETS SHEET 2.

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VV. NI PARKES. COMBINAUON THREAD DRAWING AND HEMSTTCH SEWlNG MACHINE. APPLICATION man APu.19.\9 oa. 1,170,666. mel-med 1-eb.8,191s.

s'sHLETsMsHEE s'. lgl5` 53 QZ 3/ L- L S@ /-O--O l f A UNITED STATES PATENT OFFICE.

WILLIAM N. PARKES, BROOKLYN, NEW YORK.

coMBINA'rIoN THREAD-DRAWING A'ND HEMSTITCH SEWING-MACHINE.

To all whom t may concern.'

' Be it known tha-t I, WILLIAM N. PARKES, a citizen of -the United States, residing in Brooklyn, county of Kings, and State of New York, have inventeda new and useful Improvement in Combination Thread-Drawin and Hemstitch Sewing-Machines, of which the following is a description.

This invention relates to hemstitch sewing machines.

It has for its main object the adaptation of such machines to extract' threads from fabrics -or articles thereby -producing open work and simultaneously therewith to hem- .stitch such open work.

It is also an object to so adapt the mechanism for use in combination with the mechanism of a hemstitch machine that threads will be extracted without in any way interfering with the use of -a folder or other ordinary attachment to turn the workl fora hem, or without in any way interfering with the full performance of the functions of hemstitching.

In the present form of my invention I have adapted it for use in combination with a well known hemstitchmachine now on the market, in which the movement of the work reverses once to each third reciproca.- tion of the needle, but it is noted that this kind of a movement of the work is not es sential. The invention maybe used in combination with various kinds of a stitching and feeding mechanism, and is desirable in any machine where it is desirable to extract threads, and simultaneously therewith do stitching.

' Referring to the drawings; Figure 1, is a side elevation of a hemstitch machine, disclosing a portion of the invention; Fig. 2, is a partial top plan view of the bed of the machine, parts being removed. and broken away for clearness; Fig. 3, is a bottom plan view of the bed of the machine, one of the driving gears being omitted to disclose the cutter oscillating shaft bracket; Fig. 4, is a. sectional view of the eccentric by means of which the thread cutter mechanism is `operated; Fig. 5, is a like view of the forked arm, which transmits the movement from the eccentric; Fig. 6, is a sectional detail of the bracket on which the threadcutting mechanism is mounted; Fig. 7 shows detailsA of the cutter holder lever, and the arm on which the same is pivoted; Fig.v 8, is anenlarged perspective,of the thread; cutter; Fig.

Specification of Letters Patent.

Patented Feb. 8, 1916.

Application lediApril 19, 1909. Serial No. 490,825.

9, is a cross sectional view of the bed of the machine, with certain parts broken away and other parts omitted to more clearly show the location and arrangements of parts of my device in combination withy the mechanism of a hemstitch sewing machine; Fig. 10, is a detail view showing parts in their position when the threadieflector is down;

Fig. 11, is a like vievv offthe same parts,

when the deiector is free from the goods, and the cutter is about .to operate; Fig. 12, is a.. detached top plan view of the needleplate; Fig. 13, is a sectional view of the same taken on the lines 13-13, Fig. 12 looking in the direction of the arrow; Fig. 11i, is a perspective view of the under side of the needleplate; Fig. 15, is an enlarged sectional view of the needle-plate, taken on line 15-15, Fig. 12, and Fig. 16, is a detached detail face view of the thread deflector showing the teeth on the saine.

`In the drawings A represents the arm of l the machine, and B the base or bed of the same. Insuitable bearings in the arm is mounted the driving shaft (not shown) to the end of which is secured a wheell, by means ofwhich power is transmitted to the machine.

In the present form of my invention I have adapted it for use in combination with a. usual form of stitch forming mechanism, and feeding mechanism used in hemstitch sewing machines now on the market, and well known.

In the stitch forming mechanism, is a needle bar 2 which is reciprocated in a. usual manner from the driving shaft of the machine. To the lower end of said needle bar is secured a bracket 2 1/2 that carries pivoted needle holders '3 and 4, in which are secured needles 5 and 6. On the upper shaft of the machine is mounted a usual form of cam (not shown) by means of which a lever 7 pivoted at 8 is oscillated. In the lever 7 is adjustably secured one end of connectionsv 9 and 10, the other ends 11 and 12 of which are adapted to slide on pivots 13 and 14? The end 11 of the connection 9 carries meansl for suitably engaging a 'vertical rod 15;

In suitable bearings on the under side of the machine, is secured a shaft 19, which is rotated ina usual manner from the upper or driving shaft of the machine.' To the shaft 19 is secured a gear 20'that 'meshes -with a gear. 2l ythat in turn is secured td aA suitably mounted'short shaft 22. The gear 2O being` twice the diameter of the gear 21 it will be understood that the shaft y22 is revolved twice to each rotation of the shaft 19, and the sliafl.,19 is revolved in unison with the driving shaft of the machine. On the shaft 22 is 'secured a gear 23 which meshes with 'a gear not shown, carried by the lower end of a short vertically disposed shaft 24, which latter is mounted in suitable bearings in a bracket 25, adjustably secured by means of screws 26, and slots 27 t'o the under side of the bed of the machine. To the upper end of the shaft 24, is secured a usual hook or looper 28 provided with a beak 29. On the shaft 22 is secured a second gear 30, which meshes with a gear. 31, that is secured to the lower end of a vertical shaft 32, which in turn is suitably mounted in an adjustable brac et that is secured by screws 34 and slots 35 to the under side of the bed of the machine. To the upper end of the shaft 32 is secured a looper 1,/2 provided with a beak 35 1/4.

rlhe gears by means of which the shafts 24 and 32 are rotated from the movement of the shaft 22, are all of the same diameter, consequently the shafts 24 and 32 rotate in unison with the shaft 22.

The foregoing stitch forming mechanism, which has been generally described, is of a well knowntype as before noted, and it is therefore not thought necessary to describe the operation of the same. It per se forms no part of my invention but is, in combination with it, a'part of the same, and is illustrated here for the purpose of demonstrating that it may be used in combination with the usual stitch forming mechanism of a hemstitch sewing machine.

In the invention as here described, a usual form of hemstitch feeding mechanism is shown, this will now be described in a ge r1 eral way.

On the shaft 19, is secured a gear 3G, that meshes vwith a gearl 37 secured to a short shaft 38, journaled in a bracket 39, which latter is suitably secured to the under side of the bed of the'nnichine. The gear 57 is three ltimes' thev dian'ietel.' of the gear 3G, therefore itlwill be understood the shaft 19 revolves three times to cach revolution of the shaft 58., I,'I'n the side of thev gear 37 is formed a cam grove (not shown) which engagesin a usual manner an arm 40, secured to` one end of a shaft 41, which latter is suitably journaled ina bearing extending from the under side of the bed of the ma chine. To the other end of the shaft 41, is secured an arm 42 tevvwhich is adjustably connected -a pivot 43 on which is journaled at 44 one end of a link 45. The pther end of thelink 45, is suitably pivoted to an arm y .(nqt shown) that extends upwardly from ,an oscillating shaft 46, which latter is pivu oted between centers 47 and 48. To the shaft 46 is secured an arm 49, to the upwardly extending end of which is pivoted one end of a feed bar 50, which at its other end is forked as at 51. The forked portion 51 embraces a shoe 52 carried by an arm 53k that extends horizontally from a shaft 54, that is pivoted between centers 55 and 56. To the shaft 54 is secured an arm 57, which carries .a usual anti-friction roller (not shown) that is engaged by a cam 58 secured to the end of the shaft 3S. A spring 59, one end of which is secured at 60 to a pin carried by the base of the arm 49, and at its other end by means of a screw G1, to the .feed har 50, serves as a means for normally holding the anti-friction roller carried by the arm 57 in engagement with the cam 58. To the feed bar 50, is secured by means of screws G2, a feed dog G3.

In the foregoing paragraph I have described in a general way the usual form of feeding mechanism used in hemstitclrmachines. The peripheral cam 58 is so constructed that it gives, through the intermediate mechanism, between it andthe feed dog 63, the usual vertical movements to thc latter, and the cam groove in the side of the gear wheel 257 is so constructed that it `transmits to the feed dog the usual horizontal 10o movements to the same. rlhese movements are so well known that it is not thought necessary to describe them here.

In suitable bearings ,in the machine is i, usual form of presser bar (34, depressed by 105 a usual spring (not shown). '.lhis presser bar carries at its lower end a usual form of hemstitch presser foot (35. ln suit: ble bearings (not shown) in the arm of the n'aehine, is mounted a separator bar 6G, which carries 110 at its lower end a seliarator (37. This separator'is suitably operated in a usual mannerby the Ausual form of mechanism (not shown) used in hcmstitch machines. i

To the bracket 2 1/2, is secured a part (3S 115 having a `horizontally projecting pin (39 formed on it, on which is secured-by screw 7() a thread extractor or delcctor carrier 71. provided with a thread extractor 72, having. teeth l formed on it, and terminating in a 120 needle point 7? l/2, as shown in `Fig. 16.

A needle plate 74 is provided with notchesy 75 and '79, in which, when the parts^are in their respective positions, arel located tongues 77 and 78, projecting' outwardly in 125 a usual manner from hobhin cases 79 and S9. ln the said needle plate/is formed a needle yslot and openings 82 and Sil through rwhich the' feed dog operates, and on the under side of said needle plate is '13" fic The downwardly 'extending portion87 of the part 86 serves the usual function in hemstitch machines of guarding the needles and keeping them properly separated and in suitable posit-ion' favorable for loop engagement. Through the needle plate is formed Va slot 89, which extends from 90 to 91, see Fig. 15. Along the sides. of this slot are' formed ledges 92 and 93, on which rests the 'upper cutter member 94, secured to the needle-plate by means of a 'screw 95.

At 96 the cutter member is reduced in thickness and terminates in a shear edge, as shown at 97 Iin Fig. 15.

From the needle slot 81, on the under side of the needle plate at 98 is an incline, and from 98 to the end 90 of the slot 89, the needle-plate is of the same thickness as the part 96 of the cutter plate 94. When the cutter -plate is in position, a part of the lslot 89 indicated by 99, Fig. 12, is exposed and this opening is directly under the-thread extractor 72, and forms a passage for the On the end of the shaft' 19, is secured an eccentric`100 which operates between Jaws I101 of an arm 102, that is secured by means cf a screw 103 to a shaft 104 mounted on a bracket 105 that is secured to the bracket .25. To the forward end of the shaft 104 is secured an arm 106, in which is secured a screw 107 ,having an enlarged part 108 on which is pivoted a lever 109. Through the I said lever are openings 110 and 111. On the top of said lever, there are ribs 112 and 113 that extend slightly upwardly and between Athese ribs a cut-ter plate 114, is located and secured by a screw 115. Through the cutter plate is an opening 116, that registers with the opening 110 of the cutter carrier lever. On the other end of the cutter carrier is formed a stop projection 117 in which is secured a pin 118, to the outer end of which is connected one end of a spring 119, the other end of which is connected tov a pin 120 carried by the arm 106. The cutter plate-114,has an upwardly extending part 121 provided ywith a cutting shear edge 122. The portion 121 of the cutterplate 114 is broader. than the opening 99` sothat when the machine is in. operation, it will ride across said opening without entering the same. The normal strain of the 'spring 1 19, turns the lever 109 on its pivot so that the cutter edge 122 of the cutter plate 114, is

however. then the spring turns the levery 109 a little farther on its pivot, until the stop 117 contacts with the arm 106. It will Ag therefore be understood that the function of In the operation of my improved machine, the stitching and feeding mechanisms operate as in a usual hemstitch machine, but` instead of the usual piercer entering the goods in front of the needles, the thread extractor 72 enters in the same `manner except in the present form of my invention it enters a little farther away from the needles than the usual piercer. As the needle bar descends the thread extractor also descends, and presses short ends of the threads, that run Iin the direction of the feed of the work, down through the opening 99. At this point .the part 121, of the cutter member 114, is back of the thread extractor as shown in Fig. 10. The eccentric or cam 100, `is so constructed and timed that just after the extractor is withdrawn from the work the lower cutter plate is moved in a direction from the needle across the opening in operation the cutter device shears oit' the threads that the extractor has pushed down.

v The opening 116, through the cutter plate 114, which registers with the opening 110, through the lever 109, and the opening 111, also through the lever 109 serves as passage ,ways for the discharge of the pieces of threads as they are cut off.v And the opening back of the cutter blade to the needle slot as shown in Fig. 15, prevents any clog- Vging of a stray piece of thread back of the lower member of the cutting device. In. a full size working machine that I have constructed, I find that these means serve to prevent the cut off ends of the threads from 'clogging and thereby interfering with the successful operation of the cutter device. I also find in practice that threads cut off pass down through openings 110 and 111. Under these openings any suitable means may be used for guiding these threads to any suitable receptacle that may be provided for."

the purpose.

vThe thread separator 67 performs functions ofseparatin'g the cross threads of theA material just previous to the entrance of the needles, and it also assists in crowdh ing the threads together to form :the operi spaces and bars, that constitute the open work part ofthe hemstitching done on this improved machine.

It will be understood that my mechanism as herein disclosed is a preferred form of the same, for use in'` combination with a double needle hemstitch sewing machine, but I do not wish to be limited to this particular hind of machine, or to the particular kind of mechanism I have disclosed. lVhat l claim as new is:

l. in combination in a sewing machine, a stitch forming mechanism comprising' a needle, means for producing a relative lateral movement between said needle and the work, a fabric thread extracting mechanism the extracting device of which is located to extract threads from the fabric in advance of the stitching and in the direction of the feed of the Work, and means for operating` said fabric thread extracting mechanism. l

2. ln combination in a sewing machine, a fabric thread extracting device by means of which ends of one or more threads of the fabric running in the direction of the feed of the work are extracted, a cutter device for cutting off the ends of said fabric threads, and a stitching device adapted to bind or stitch the fabric along the edge of the path from which said fabric threads have been extracted. l

The combination in a thread drawing and hemstitch sewing machine, of a vertically reciprocating fabric thread ext actor, a horizontal reciprocating cutter for shearing oli" the threads extracted, and a stitch forming mechanism comprising a vertically reciprocating and laterally vibrating' needlefor making hemstitches or binding stitches along the edge of the path from which the fabric threads have been extracted.

l. ln combination in a hemstitch sewing machine, a stitch forming mechanism .comprising one ory more vertical reciprocating and laterally vibrating needles, a. feeding' mechanism by means of which the work is advanced once to cach third reciprocation of said needle or needles, a fabric thread extracting device, a cutter device, and means for operating said cutter device so that it acts to shear off the ends of the extracted fabric thread l.ach time the needle is reciprocated.

In combination in a hcmstitch sewing machine having a needle plate or its equivalent, a vertically reciprocatingl and laterally vibratil'lg needle, an aperture through said needle plate for the passage of the needle, a reciprocating fabric thread extractor located to operate adjacent to the needle and in front of the same, an aperture formed through said needle plate for the passagey of the fabric thread extractor', a cutter located below said needle plate' to cooperate with said thread extractor, and means for reciprocating said cutter.

(3. A combination hemstitch and fabric thread eXtracting machine comprising a vertically reciprocating' and laterally vibrating needle bar, a fabric thread extractor carried by said needle bar, a needle plate, a cutter device having 'two cutting members, one of said cutting members carried by said needle plate, the other cutting member adapted to reciprocate below said needle plate, and means for reciprocating said other cutter member.

7. A combination hemstitch sewing machine and thread extracting device comprising a cutter device having two cutting members, a needle plate, one of said cutting members attached to said needle plate, an oscilalting lever, the othercf said cutting members carried by said lever, and a spring con` nected with said lever by means of which the cutting member carried by it is held into engagement with the cutting member carried by the needle plate.

8. ln combination, mechanism for removing body-threads from fabric to prodlice drawn Work; mechanism for hemstitching the Work along the thread-drawn line as said body-threads are removed; and means for feeding the work intermittently and progressively up to and beyond both the threadremoving and the stitching mechanisms.

9. In combination, mechanism for removing body-threads from fabric to produce drawn-work; stitch-forming mechanism for hemstitchin'g the work on each side of the thread-drawn line as said body-threads are removed; and mechanism for feeding the work intermittently and progressively up to land past both the thread-iemovinr and ,V

stitching mechanisms.

l0. In combination, mechanism for removing body-threads from fabric to produce drawn-Work; stitching mechanism for stitching the Work along the thread-drawn line as said body-threads are removed; and

a feeding mechanism including means for L intermittently and progressively feeding the work up to thc thread-removing and stitching' mechanisms.

l1. In combination, stitch-forming mechanism; feeding mechanism for feeding the work to and beyond the stitching mechanism; and thread-drawing mechanism, including a reciprocating thread-deflecting blade, a cutter mechanism for cutting the defiected threads arranged between the stitching mechanism and the thread-deflecting blade whereby the threads of the work` will be deflected by the blade and carried by the feed into cooperation with the cutting mechanism. i

12. In combination, stitching mechanism; feeding mechanism for advancing the Work to and from the stitch-forming mechanism; and thread-drawing mechanism, including a thread dellecting device, and .a movable cutting-blade, a stationary bladehcoperating with the `cutting blade; the said threaddraiving mechanism being located in advance of the stitching mechanism, and the feed-dogs of the feeding mechanisn'i being @masse exended in advance of the thread-drawing mechanism, whereby the Work is fed up "in hhs thread-drawing mechanism, the thread is drawn from the fabric and cnt, and the 'anric hen advanced o and from the stitching mechanism.

i3. 4in combination, stitch-forming mechanism; feeding mechanism; and `threaddrawing mechanism; the stitch-forming mechanism and the tlnfead-drz'm'ing mechanism being arranged one behind the other in the line ci? feed; and the feeding mechanism including a feed-bar carrying a pair ci narailel feed dogs arranged en opposite sides of Jche sitch forming mechanisni and he thread-drawing mechanism.

M. in cenibinatiom mechanism for reincving certain of the body-threads of fabric; mechanism for gathering in a predetermined mannerv the remaining bodyth reads Q *he fabric at the point where the first mentioned 'threads are renievech said mechanism being arranged in rear of he thread-removing mechanism; and mechanism for antcinaiically feeding the fabric np te and beyond ho'ih the thread-reineving and thread gathering mechanisms se that as said ihreads are removed the remainingthreads can he gathered.

l5. ln combination, mechanism cr defiecting certain of the ihreads of the bodyfahric; a stitch-forming mechanism, ai'- rangcd in real' ef the deliecing mechanism, for gathering the remaining` body-threads inte grcnps; a ihrcad cuttingY mechanism arranged heivween the thread dellecting and stiiicli-iniiiiiiig mechanisms; and a feeding;` mechanism Li'er adiancing the work in and frena hath he hread dedeeting and stiehforming inechanisis, whereby 'the defieceed threads Win e cai-r ,ed into position to he rc` moved by he cntcin mechanism as a preliininaryize che npeiann of the stitch-forining mechanism.,

1G. The ccmhinai'inn in a thread-drawing and heinstitch sewingmachine? of a verticaiiy-reciprecahing fabric thrcaiidefiectcr, a cui-ier for shea ring ol'i' hc delieced thread, and a stitch-forming'mechanism comprising a Yeriically-reciprneating and laterally-vibrating nc lle ier making' hemstiiiclies/Qr binding ches along he edge ci the path from which he iahric hreads have been extracted.

l?. threat Vilaine haring parallel shits for he ciierailinn nf feed dogs separated by a lengi'ndinai har, said har being provided nich a langindinal slet, a blade set vwithin said shui and means for securing jshe hiadf in he elf ihe har.

iS. hrnai; plate, 'for use in stitching machines, ha ving a feed sich a needle aperture adjaceill said i'eed sich, and an clongated slet arranged in ifl'cnt of and in alinenient with said .needle aperture, a cuttingr blade arranged in said elongated slot. and means ier remevahly securing said blade in. place,

in esiiniony whereof have hereunto signed my nana` in die presence of two subscribing Milne-ses. v

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