US1118589A - Chain-severing device for sewing-machines. - Google Patents

Description

D. S. SEYMOUR. CHAIN SEVBRING DEVICE FOR SEWING MACHINES.

APPLICATION FILED JAN. 2, 1906.

1 1 1 8,589; Patented Nov. 24. 1914 4 SHEETS-SHEET 1.

attozmu Witnesses D. S. SEYMOUR.

CHAIN SEVERING DEVICE FOR SEWING MACHINES. APPLICATION FILED JAN. 2, 1906.

I, 1 1 8,589. Patented Nov. 24, 1914.

4 SHEETS-SHEET 2.

S (Unucuhu wihwuea atloznev D. S. SEYMOUR. CHAIN SEVERING DEVICE FOR SEWING MACHINES.

APPLICATION FILED JAN. 2, 1908. 1, 1 1 8,589. Patented Nov. 24. 191

4 sums-sum x S, v (inventor S: W witnesses G/U [ll-ELL APPLICATION FILED JAN. 2, 1906.

Patented Nov. 24. 191% 4 SHEETS-SHEET 4.

Snucukoz To all whom it may concern UNITED sTATEsrAtrENT orn on.

DUDLEY S. SEYMOUR, OY-OAK PARK, ILLINOIS, ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS. A CORPORATION OF ILLINOIS.

CHAIN-SEVERING DEVICE FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Nov. 24, 1914.

Application filed January 2, 1906. Serial No. 294,256.

Be it known that I, DUDLEY S. SEYMOUR, acitizen of the United States, residing at Oak Park, in the county of Cook, State of Illinois, have invented certain new and useful" Improvements in Chain-Se\-ering Devices for Sewing lvl achines, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

This invention relates to sewing machines of that general class employed for the sewing of bags or other articles, wherein the articles are united by a continuous chain of stitching, which must afterward be severed at points between the articles.

.he principal object of the invention is to provide a cutting mechanism, in combination with means for automatically feeding the loose chain between the cutters.

A further object ofthe invention is to provide a chain-depressing mechanism that is normally held elevated by the bags or other articles being stitched.

A-still further object of the invention is to provide a chain-depressing mechanism that is associated with the presser foot in such manner that when the presser foot is raised, the chain-depressing device will also raised, and will be automatically locked and held in elevated position.

A still further object of the invention is to provide a chain-cuttin attachment for machines having a top feet.

A still further object of the invention is to provide means for holding the chain from backward movement during the return of the feed dog to the front position.

A still further object of the invention is to rovide a sewing machine of this type having a. top feeding member so arranged and constructed as to permit of the application "of a chain-depressing member.

With these and other objects in view, the invention consists in the novel construction and arrangement of parts hereinafter de scribed, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form and proportions of parts. and minor details of construction may be made without departing from the spirit of the invention.

Referring to the drawings: Figure 1 is a front elevation of a sewing machine embodying the invention; Fig. 2 is an end elevation of the same, drawn upon an enlarged scale; Fig. 3 is a rear elevation of the machine; Fig. 4 is a detail perspective view,-

is a transverse sectional, view in the plane of the needle, showing the arrangement of the clu'lin-depressing and cutting devicesin operative position; Fig. 6 is an elevation, illustrating the chain-depressing mechanism and presser foot in an'elevated position; Fig. 7 is a detail view, looking from the inner side of the presser foot and showin the manner in which the chain-depressing evice is held elevated by the passing bag or other article, Figs. 8 and 9 are detail sectional views on the lines 8-8 and 99 respectively, of Fig. 2; and Fig. 10 is a perspective view of a modified form of chain depressor for use on a two needle machine.

Similar numerals of reference indicate eorres 'ionding parts throughout the drawmgs.

The frame of the machine embodies the usual goose neck A and bed plate B, while the stitch-forming mechanism may be of the type ordinarily employed in machines of this class. the feed block, however, being slightly modified in order to permit the depression ofthe chain between the articles.

The forward end of the throat late 10 is provided with the usual slots for t e passage of the feed block 12 and theneedle, and in rear of the main feed block 12 is arranged a supplemental t'eed block 13, that is secured to the reciprocatory carrying arm 14, both the feed block members, receiving uniform movement. The feed block 13 is arranged to operate in a slot 15 formed in the rear end of the throat plate, and between the two slots 11 and 15 there is sufficient space for the depression of the loose chain between the adjacent articles. The supplemental teed block 13 is further provided with a. centrally disposed slot for the passage of a chain-depressing foot 17, which has a grooved lower face for engagement with the loose chain. v

The main resser foot 18 is carried by a presser bar 18, of ordinary construction and may be raised to inoperative position by the usual handled cam 20. This presser foot is open for the reception of a top feed bar 21,

that is free to slide to and fro within the presser foot, and is held in proper position with respect to the base of the foot by means of a small anti-friction roller 22, journaled in the side walls of said presser toot. g, The top teed bar is provided with an elongated slot 23 to permit the free passage of the needle and its rear end is provided with a slot 24: for the passage of the chaindepressing foot. This chain-depressing foot carries a pin .17 which engages against the upper face of the top feed bar and limits downward movement of the chain depressor. At the same time, the pin, resting on the bar,

is raised with the latter when the presser bar is elevated. The rear end of this feed bar is bent upward at'an obtuse angle to the plane of the throat plate, and thence extends in a generally verticalv plane, itsupper end being provided with a forwardly extending 2o toe 25, that i adapted to engage with a lug 26 projecting from a supplemental presser bar 27, guided vertically in lugs 28, projecting from. the head of the machine, and connected with the main presser bar 19 by a pin 29. The feed bar is provided with a reinforcing rib 30, that extends tromthe point adjacent to the rear end of the presser foot, to a point adjacent to the toe 25;

The rear face of the top feed bar is pro so vided with a projecting lug 32, to which is connected the lower end of a' telescopically adjustable rocker arm 33, the upper end of said arm being rigidly seemed to a shaft 34:, that is mounted in bearingsformed in lugs 35 35 p; ojecting from the rear face of the goose nec To the rear end of this shaft is secured a rocker arm 36, having an arcuate slot 37 for the reception of a pin 38, which may be locked in any adjusted position, the regular distance between the axis of the shaft and the axis of the pin 38 being adjusted in accordance with the feed desired.

On a pin 38 is mounted the upper end of a,

connecting rod 89, that extends down through a slotor recess in the bed plate of the maching'and carries an eccentric strap dd, that is operated by an eccentric 41 on the main shaft U.

To the lower portion of the presser foot to bar is secured a bloclr 44, that is provided with a bearing for the shaft 42, at the rear end of which is mounted the chain-depress foot 17, that isheld down in engagement with the chain by means of a spring t2. This chain-depressing foot is in the form of a bent arm at the outer or lower end oi which is a widened or lengthened foot member having a grooved lower face to receive and guide the chain, and extending an transversely across this presser foot is a notch or groove. hi, which, when the toot is depressed, serves to receive and permit free action of the chain cutting blade. This 'de- "oressor may also he provided with two or .ore grooves "for use in connection with a machine making two or more chains. of stitches. To this depressing toot is secured a cam 47, having a lOWer rounded face that 18 arranged to one side of the presser toot in mediately to the rear oi the needle, and 1s designed to ride on top of the bag or other article being stitched. This cam is arranged immediately above a curved recess d8, that s formed at one" side'of the throat plate, and in operation, the fabric will be bridged across this notch or recess, and the cam will ride freely on top of the fabric, and will hold the depressing foot slightly above and out of contact with the chain of stitching and the fabric. It is. only when the cam is unsupported, that is to say, when the end of one article passes beyond it, that the cam descends, and allows similar movement of the depressing foot, the latter then acting to force the loose or free chain of stitching.-

downward through the slot 15 into engage ment with the cutting devices.

Secured to the lower portion of the'head of the machine is a. block52 carrying a stud 53, on which is mounted. an arm 54, which is depressed by a coiled spring-53' surrounding the stud, and having one end secured to the frame and the other end tosaid arm. The lower end of the arm 54 rests on'the fabric at a point slightly in advance of the depressing foot,,and its lower face is in hori zontal alinement with the lower face of said foot. When elevated, the arm will cause the depressor to swing on its pivot and the lower end. of the arm will enter the transversely disposed notch or recess 46, and positively lock said foot in the elevated position shown in Fig.6.

In order to lift the depressing :t'oot, when the top feed and presser foot are elevated, the block 44: is provided with a cam 56, arranged to engage the lower edge of the arm 54., and as the presser foot bar moves upward, this cam raises the arm 54, moving the latterfrom the position. shown in Fig. 5 to that shown in Fig. 6, and finally interlocking, therewith, in order to hold said foot in elevated inoperative position. During the upward movement of the feed dog, the presser foot is pushed up and cam 56 then acts to slightly raise the arm 54, releasing the chain clamped or held by said arm, so that it may be fed forward. lvVhen the feed dog descends the arm 54 again moves down against the chain, and clamps it against the work support.

lmmediately below the throat plate is arranged a fixed cutting blade,60, the cutting edge of which is slightly in rear of the forward edge of the slot 15. @n the lower portion of the bed plate is secured a, block 61, forming a bearing for the transversely disposed shaft 62, to which is secured a rocker arm 63. The upper end of the rocker arm -5 is grooved for the reception of an adjustable blade 64. A screw 64" clamps the blade 64 against one wall of the groove in the arm 63 and by releasing this screw the blade may be adjusted. The inner end of the shaft 62 is provided with a rocker arm 65, having a ball-shaped end that fits within a suitable socket formed in the connecting rod f56. At the other end of the connecting rod is an eccentric strap 67, surrounding an eccentric 68 on the main shaft C of the machine.

In the operation of the device, movement is transmitted to the blade 64, solong as the stitching operation progresses, and the parts being in the position shown in Fig. 7, the depressing foot 17 is held slightly elevated above the line of stitching in the fabric by the elevating cam 47. While any fabric remains under this cam 47, the depressing foot will be inoperative, but as soon as the end of a bag or other article passes from under the cam, the latter will fall, and the-de pressing foot will force the free chain of stitching down through the slot 15, that portion of the chain which bridges the slot 15 being forced between and severed by the knives. As the cutter operates continuously, the .chain is clipped as long as it is held depressed, and the articles of thread so severed, fall through an opening 70 in the frame and thence pass through the similar opening in the table or other support on which the machine is mounted.

During the operation of themachine, the rear portion 13' of the feed dog serves to engage the piece of fabric after it has passed beyond the stitch-forming mechanism, and carry it by the cutter and in so doing hold the chain taut between the .throat plate needle hole and the fabric, but just as soon .as the rear feed dog stops feeding the goods the chain becomes slack and the depressor then carries the chain down to the cutters. The location of the cutter being between the rear feed dog and the thaoat plate needle hole, it thus leavesa chain of thread upon the piece of fabric that has been stitched,

and also leaves a chain of thread on the front of the fabric that is being stitched, or, in other words, a portion of the chain is left at the beginning and ending points of the sewing. This is necessary, as with the chain stitch machine, it prevents the raveling back of the stitches.

It will thus be seen that the stitching operation may progress continuously while the bags or other articles are severed.

Having thus described my invention,what I claim as new and desire to secure by Let ters Patent, is

1. In a sewing machine, stitch-forming mechanism, feeding mechanism, mechanism for severing the threads including relatively moving members, and a device to deliver the 6 thread to the severing mechanism, said deto operate it, means to deliver the thread to the cutter, and means under control of the a fabric for. raising and lowering said delivering means.

3. In a sewing machine, stitch-forming mechanism, mechanism for severing the thread including relatively moving members. a device for delivering the thread to the cutter, said delivering device being arranged to operate in a vertlcal plane and being controlled by the articles being stitched.

4. In a sewing machine, mechanism for severing the thread including relatively moving members, a device controlled by the articles being stitched for delivering the thread to the severing mechanism, saiddelivering device havin means to hold the thread in position on its operative face.

5. In a sewing machine, stitch-forming mechanism, a device for severing the thread and means to operate it, means to deliver the thread to the severing device, including a controlling arm engaging the fabric, said fabric-engaging arm having its face engaging the fabric shaped to offer the least resistance to the passage of the material being stitched.

6. In a sewing machine, stitch-forming mechanism, a work support having a throat plate, a presser foot, a device for severing the thread, means for delivering the thread to the severing device, said resser foot and throat plate being providec with a slot in I which said thread-delivering means operate.

7 In a sewing machine including a needle and bed plate, a device for severing the thread located on one side said' bed plate, a device engaging the thread to deliver it to the cutter, said thread-engaging device being located on the opposite side of said bed plate and adapted to carryl the thread from one side the bed plate to t e otherside thereof.

8. In a sewing machine, stitch-forming mechanism, a cutting device, means to deliver the thread to the cutting device and automatic means regulated by the passage of the fabric to control the action of the thread delivering means, whereby articles may be stitched and the connecting threads between the same severed.

9. In a chain stitch sewing machine, a cutting device for severing the thread between successive articles, means to deliver the thread to the cutting device, and means in engagement with the material being stitched to prevent the delivery of the thread to the cutting device by said delivering means until the material has passed the stitch-forming; device.

10. In a chain stitch sewing machine,

means to form successive stitches after the material being stitched has passed the stitchforming device, means to feed said stitches forward, a cutting device at one side of the line of feed, and means to operate it, and

the cutter.

11. in a chain stitch sewing machine, means to form successive stitches after the material being sewed has passed the stitchforming mechanism, means to feed said stitches forward, means located in rear of said stitch-forming mechanism and at one side-the line of feed to sever said stitches, means for delivering said successive stitches to the severing device, and means to control said delivering means, whereby a predetermined length of stitches beyond the edge of the material is formed before the severing talres place.

12. lln a sewing machine a bed plate,

stitch-forming mechanism for stitching articles and forming a chaln of stitches between successive articles, a constantly open 23 ated cutting device, means for causing the same to act noon the chainoi stitches at predetermined times, and means to feed said chain for said bed plate being erovided to allow the cuttings of om the stitch- U-o thread to he ca away for: inechanismand cu 18., machine, stitch-forming mecli device, means to ope iver the thread to the c omatic means to raise device before the ma- -l its thread-engaging end. let, in a machine, stitch-twining mechanism .ng device and means tor I the I on the la n the device the threadh-eo for delii open a ive conn conta machine, stitch-forming mechanism including a W device, means to r clamp the thread while slow the top of the bed plate when said teed dog rises means for delivering the device.

nachine, stitch-forming mechanism including a foot and its'supporting dc e receiving mo he iced dog,

means to deliver said successive stitches to ill.

intense and means to raise said resser foot and clamping device together.

18. In a sewin machine, stitch-forming mechanism, a fee ing mechanism, a cutting device and means to operate it, adevice acting to deliver the thread to the cutter, said feed mechanism including a two part feed member, the rear portion having a vertical slot for the reception of the device acting upon the thread. I

19. In a sewing-machine, stitch-forming mechanism, a feeding mechanism, a cutting device and means to operate it, said feeding mechanism including a two part feed dog, one part arranged in advance of the cutter and the other in rear thereof and means for delivering the thread to the cutting device controlled by the article being stitched and means for imparting the usual four motions to the feed do 20. in a sewing machine, stitch-forming mechanism, a feeding mechanism, a cutting device, said feeding mechanism including a two part feed member, one part arranged in advance oi the cutter and the other in rear thereof, and a movable device for deliver ing the thread into the path of the cutting device.

21. In a sewing machine, stitch-"forming mechanism, and :te-eding mechanism, acutting device and means to operate it, a Presser foot, said "feeding mechanism including two part feeding device located one in advance of the other and between which said cutting device operates, said presser foot cooperating with both parts of the feed to carry the materiai clear of the cutter and means controlled by the article being stitched to deliver the material to be severed to the cutter,

22.. r a sewing machine, stitch-forming mechanism, a cutting device and means to operate it, a device acting to deliver the thread to the cutter, said. device being normally held spring pressed in engagement With the thread,

22-5. in a sewing machine, stitch-forming mechanism, a cutting device and means operate it, a devi'ze acting to deliver the thread to the cutting device, said thread delivering device losing normally held spring pressed in. engagement with the thread, and means for controlling the move ment of the thread-delivering device.

In a sewing machine, stitch-forming mechanism, a suitable presser feet, a cutting device, and a device acting on the chain oi? stitches to carry the same to the cutter, and means whereby the presser foot and chain carrying device are elevated together.

25. In a. sewing machine, stitch-"forming mechanism, a suitable presser foot, a cutting device, means acting on the chain stitches to carry the same to the cutter, an auxiliary device independent the resser inc foot, for engaging the chain of stitches, and means whereby the presser foot, chaincarrying device and auxiliary device acting on the fabric are elevated together.

26. In a sewing machine, stitch-forming mechanism, a suitable presser foot, a cutting device, means acting on the chain of stitches to carry the thread to the cutter, a single lever to raise the presser foot, and chaincarrying device above the cloth plate.

27. In a sewing machine, stitch'forming mechanism, and a top feeding device, a

presser foot, a cutting device and means to operate it, and a thread-delivering device for carrying the thread to the cutter, and means for simultaneously raising the top feeding device, presser foot and thread delivering device.

28. In a sewing machine, stitch-forming mechanism, and a top feeding device, a presser foot, a cutting device and means to operate it, a clamping device acting upon the chain of stitches, a device for delivering the thread to the cutter, means for simultaneously raising said top feeding device, presser foot, thread-clamping device and said thread-delivering device.

'39. In a sewing machine, stitclrforming mechanism, a cutting device and means to operate it, a clamping device acting upon the thread, a device for delivering the thread to the cutter, said thread-clamping device being pivoted to a stationary part of the machine frame, and means whereby the said thread-clamping device is elevated above the work plate.

30. A sewing machine having chain stitch-forming mechanism and a continuously operable thread cutter, and means for engaging the loose chain between successive articles and forcing the same into the path of the cutter.

' 31. A sewing machine having chain stitch-forming mechanism and a continuously operable thread cutter, and a fabriccontrolled depressing means for engaging forming mechanism, a slotted fabric-sup;

porting plate, a thread cutter arranged below the slot, and means for forcing the'loose thread downward through the slot, into the path of the cutter.

34. A sewing machine having stitchforming mechanism, a slotted fabric-supporting plate, a continuously operable thread cutter below the slot, and an auto- 86 matic means for forcing the loose thread downward through the slot into the path of the cutter.

A sewing machine having stitchiorming mechanism, a slotted fabric-supporting plate, a continuously operable thread cutter arranged below the slot, and a fabric-controlled means for forcing the loose thread downward through theslot into the path of said cutter.

36. A sewing machine having stitchforming. mechanism, a slotted fabric-supporting plate, a continuously operable cutter arranged below the slot, a thread-depressing toot operatingthrough said slot, and a fabrie-supported member serving to hold said foot in elevated position while fabric is passing under said member.

37. A sewing machine having stitch-form ing mechanism, a thread cutter, a fabricsupporting plate having a slot, the plate being disposed above the cutter, a pivotally mounted arm having at its free end a threadengaging and depressing foot, and a clothsupported member carried by said arm and serving to maintain the foot in elevated position during the passage of fabric beneath said member.

38. A sewing machine having stitch-forming mechanism, a slotted fabricsupporting plate, a thread cutter arranged below the slot, said plate being further provided with a recess or depression over which the fabric passes, a pivotally mounted arm having at its free end a thread-engaging and depressing foot, and a cam-shaped member carried by said arm and riding on the fabric bridged over said recess or depression.

39. A sewing machine having stitclrforming mechanism, a slotted fabric-supporting plate, a pivotally mounted arm having at its free end a thread-engaging and depressing foot slotted to permit bridging of the thread, a thread cutter arranged below the slot of the plate and arranged to pass through the slot of the foot, and a cloth elevated member carried by said arm and normally holding the thread-depressing foot inoperative.

40. A sewing machine having stitch-forming mechanism, a top feed bar having a slot, means for operating the same, a fabric-supporting plate also provided with a slot, a thread cutter arranged below the fabric-sup porting plate, and a thread-engaging and depressing member operatin through both slots to depress the thread into engagement with the cutter.

41. A sewing machine having stitch-forming mechanism, a slotted fabricsupporting plate, a thread cutter arranged below the plate, a top feed bar having a longitudinal slot, means for raising and lowering said top feed bar. a pivotally mounted arm supported by the presser bar and having at its free end a thread-engaging and depressing member operating through the slot of the [and by said arm, a second arm supported by a fixed portion of the frame and arranged to engage with the pivoted arm, and a cam carried by the presser bar and engaging said second arm to effect positive upward movement of the thread-depressing arm when the pressei' feet and top feed are raised.

d2; A sewing machine having stitch-form ing mecimnisni a slotted fabric-supporting ate, a thread cutter arranged below the ate a resser foot a top feed bar having its forward end guided by said presses foot, presser' bar, an auxiliary presser bar connected thereto and guided by the frame, a lug projecting iroin'tiie auxiliary presser bar, a toe extending from the upbent end of the top feed and engaging said lug, a rocker arm having a pivotal connection with the top feed and serving to transmit movement thereto, a thread-engaging and depressing arm carried. by the resser bar, second arm pivoted to the frame and a cam carried by the ptessei bar and'engaging said second r 1,1 aeese arm to effect movement or? both arms to eievated position andthe interlocking of said arms when elevated.

43. in a sewing machine, a presser foot, a cutting device and means to operate it automatic means for rendering said cutter efiecthe 01' ineffective, said means rising and failing with said resser foot as the amount of material under it varies.

i i. in a sewing machine a feeding mechanism, a cutting device, means for operating said cutting device continuously, automatic means independent of said feeding mechanism for causing a relative movement bctween said cutting device and the material to be cut for rendering said cutting device effective or HWEQCUVQ.

in testimony Whereot i afiix my signature, in presence of two witnesses.

DUDLEY S. SEYB EUUR.

Witnesses g CHESTER MGNEIL, F. S. NORTH.

Images