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Publication numberUS1751508 A
Publication typeGrant
Publication dateMar 25, 1930
Filing dateMar 25, 1929
Priority dateMar 25, 1929
Publication numberUS 1751508 A, US 1751508A, US-A-1751508, US1751508 A, US1751508A
InventorsChristensen Norman V, Zeier Frederick F
Original AssigneeUnion Special Machine Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Sewing machine
US 1751508 A
Abstract  available in
Images(5)
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Claims  available in
Description  (OCR text may contain errors)

-Manh 25, 1930. I N. v. CHRISLI'EINSEN ET AL SEWING MACHINE Original Filed April 16 "1928 5 Sheets-Sheet March 25, 1930 N. v. CHRISTENS EN T i- 1,751,508

SEWING MACHINE Origin al'Filed April 16, 1928" 57-Sheets-Sheet 2 SEWING-MACHINE or iginal Filed April' 16 1928 55heets-Sheet 4 Patented 'Mar; 25, 193d UNITED STATESPATENT OFFICE NORMAN V. CHRISTENSENAND :FREDERICK F. ZEIER, OF: CHICAGO, ILLINOIS, AS- SIGNORS TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS. A 'COR- POBATION OF ILLINOIS Continuation of application Serial No.

The invention relates to new and useful improvements 1n sewing machines for stitching at the edge of a fabric. The present app1ica-- 'tion is a continuation of our prior applica- .tion, Serial Number 270,446, filed Aprll 16,

An object. of the invention is to provide a V machine of the above type of comparatively few parts'which are positively connected to an actuating shaft whereby said parts may be driven at a relatively high speed without producing'excessive vibrations in themachine.

A further object of the invention is to pro-' vide a machine of the above ,type having a four motion feedin mechanism, a needle, and complemental stitc forming devices wherein all of-the parts are actuatedfrom a shaft tive connections therewith.

A further'object of the lnventionis toprovidea machine of the above type with asuplocated above the work supportand by fposi- 4 porting standard for the actuating shaft,

which standard is located at oneJside of the lineoffeed and substantially in rear of the stitching point 'so as to provide clearance space for the free passage of the material 3 being. stitched. I

A further object of the invention is to provide a machine of the above type wherein the actuating shaft is disposed so as toextend in the general direction of the feed and located, substantially in rear of the stitching point in orderthat the operated parts be stitching point and theactuating shaft is disposed not only so as to extend 1n the general direction of the feed and in rear of the stitching point but also in a direction at "rig lit angles to the inclined needle bar.

further object of the invention is to provide a machine-of the above type whereinlthe actuating shaft ismounted in journaled bearings adjacent the ends-thereof, which ournaled bearings are carried by spaced arms formed integral with the standard located in 59 a vertical plane at one side of the lineof feed fully disclosed. In the drawings SEWING MACHINE I v 270,446, filed April 16, 1928. This application filed March 25, 1929. Serial No. 349,795. 1

and extending in the same general direction" 7 as the-feed.

These and other objects will in part be obvious and will in part be hereinafter more Fig. 1 is a view partly in side. elevation and partly in section along the line of feed with the cover plates for the up per portion of the machine removed.

Fig. 2 is a vi'ew partlyin front elevation and partly in sectionon a line at right angles to the line of-feedsubstanti'ally at the stitching point and with the cover plate for the upper portion of the machine removed.

} Fig. 3 is a sectional view on the line 3-3 of Fig. 2.

Fig. 4 is a top plan. view of a. portion of the machine with the cover plate for the upper portion of the machine removed.

, s a view from the front of the ma- Fig. 5 chine of a portion of the bed plate showing :the manner of mounting the lower trimming deviceland strip deflector, and also in-section the cloth plate and latch for holding-the same in closed position.

f Fig. 6 is a vertical sectional view through the upper 'sectionof the machine in a plane passing through the actuating-shaft. Fig. 7 is a view'from the end of the actuating shaft showing the needle head, the 'presser barjspring and the Presser bar in section, the needle bar and actuating mech- -anism therefor being omitted.

Fig. 8 is a view partly in top plan of the needle head and partly in section through the link connection to the needle bar.

'General'etmcture h The invention relates to an improvement in sewing machines, and more particularly, to animprovement in a sewing machine which is adapted for stitching-at the edge of a fabric. The machine includes a work support on which the fabric. rests while it is being stitched. The fabric is fed across the work support byia-feeding mechanism which is of' the four motion type, and includes both a main and an auxiliary feed dog, which preferably have differential feeding movements imparted thereto. -'The material is held on 100 the work support by-a presser foot carried at the outer end of'a lever arm which is spring .pressed toward the work support. This resser foot may be raised by suitable treae connections; Feedingmovements are imparted to thefeed dogs by'a feed rocker. The machine .is especially adapted for forming overedge stitches. -The present illustrated. embodiment of the invention is for this purpose andthe stitch'forming mechanism in cludes a needle'whichreciprocates in a line.

inclined to the plane of the work support.

' Cooperating with the needle beneath the work support is a 'looper preferably of the thread carrying type and cooperating with this lower looper is an overedge looper'which is likewise preferably of the thread carrying type.

' The overedge looper, in turn, cooperates with the needle. The fabric being stitched is trimmed prior to the stitching ofthe same.

- This is accomplished by the aid of a station ary trimming blade carried by the work supportor'bedplate beneath the same, and a movable trimming blade which is carried by an arm located above the work support. The movable blade is carried .by a lever arm fulcrumed adjacent the rear .side of the work support. Thelever arm is connected to the feed bar for raising and lowering the feed dogs. All of the parts referred to are.operated-by a single actuating shaft which is .disposed above the plane of the work support. The shaft is mounted in bearings car ried by a standard, which standard is mount- .ed on the bed of the machine and located at one side of the line of feed'in rear of the stitching point so that clearance for the material being stitched is afforded. This shaftextends in the general direction of the feed,

but lies in a vertical plane which is inclined to the yertical plane containing the line of feed. The shaft also liesin a line which is inclined to the plane of the work support. The shaft is so positioned that it may be directly connected to an arm extending forward from the feed rocker to a point beneath the shaft. The shaft is also directly connected to the lever arm which vibrates the trimming blade and raises and lowers the feed bar and this connection is directly beneath the shaft. The loopers are operated by an oscillating arm, the end of which is directly beneath the actuating shaft and is oscillated by an eccentric strap cooperating with an eccentric member on said shaft. The needle bar is reciprocated by a link which is directly connected to a crank on the end of the shaft. Thus it is that all of the actuated parts are directly connected to the actuating shaft.

Frame struct'u/re The machine includes a supporting bed 1 on which is mounted a work support 2. At

the right hand side of the bed plate as viewed in Fig. 2 there is a standard 3 which extends vertically to a point adjacent the upper end of the machine. This standard carries a bracket arm 4 at therear sidethereof and a bracket arm '5 at the front side thereof. In

these bracketarms 4;.and 5 are the journal bearings for the actuating shaft 6 of the machine. The actuating shaft 6 carries a belt wheel 7 by which it' isrotated. This constitutes the general frame of the machine on which all the actuated parts are mounted. As clearly shown in the drawings, the standaid 3 is disposed atone side of the line of feed and inrear of the stitching point. This positioning of the standard which carries the actuating shaft at one side of the line of feed,

gives ample clearance for the material being stitched so that it may be fed continuously through the machine and .past the standard.

Feeding mechanism l The material is fed across the work support by a feedmgmechanism which includes two feed dogs 8 and 9. The feed dog8 is carried 'by a feed bar 10. It is adjustably connected to this feed bar so that it may be raised and lowered on the feed bar. The feed bar 10 is pivoted at 11 toa feed rocker 12. The feed rocker 12 is mounted on a' shaft 13 which is journaled in suitable bearings carried by the bed of the machine. An arm 15 is formed integrally with the portionl lof the feed rocker. .The arm 15 is slotted at 16. Mounted in the slot 16 of the arm 15 is an adjustable stud 17 carrying the ball head onthe outer end thereof. Cooperating with this'ball head of the stud 17 is an eccentric strap 18. The eccentric strap 18 in turn cooperates with an eccentric 19 on the actuating shaft 6. It will be noted from Fig. 3 of the drawings that the ball of the stud 17 is directly underneath the actuating shaft 6, the position of which is indicated inihis Fig. 3 by the broken line Therefore, the eccentric strap 18 ex tends in a direct downward direction from the main actuating shaft. The plane of os-- cillation of the arm 15 is slightly inclined to a vertical plane cutting the axis of the so that it may be said that the actuating shaft is in rear of'the stitching point and extends in the same general direction as the feed. By this positioning of the actuating shaft, the direct operation of the feed rocker is accomplished and, at the same time, the actuating As a consequence, the shaft 6 members are sufliciently-a't one side of ,the

line of feed as not, in any way, to' interfere with the free movement-of the fabric across the work support. The arm extends in a direction substantially lengthwise of the actuating shaft. The connecting stud 17 between the arm and the eccentric strap is ad j ustable lengthwise of the arm and, therefore in adirection so that the shifting of the cocentric strap for adjusting the length offeed.

is accomplished by a movement of the eccen- 'tric strap laterally of the plane of. rotation .of' the eccentric.

The adjustment of the eccentric strap for varying the length of the 'main feed bar 10. The feed bar lever 20 carrying the auxiliary feed dog'is provided with' a proj ting rod 22 whifzh slides freely in a sleeve" 3. Thissleeve 23 is pivotally mountedonan arm 24' which, in turn, is adjustably fixed to a lug 25 carried by the bed of the machine and the arm may be adjusted and held set in adjusted position by lock-nuts 26. v A

"Bothfeed bars are raised and lowered multaneously by means of a link 27. T

link 27 engages the outer end of the pin member 21. 'When the link is raised and lowered .through an actuatingmeans therefor which will be descri'bed later, the feed bars are raised and lowered. When the feed bars move back and forth the rod '22'will slide in the sleeve 23 and change the angular position of the feed bar leverarm carrylng the auxiliary feed dog, and thiswill cause the auxl iliary feed dog to be lowered from engagement with the material at an earlier period ifi the cycle of travel than the main feed dog. Thus it is that the main feeddog has a slightly longer fabric feeding stroke and will gather in the material sufliciently to overcome any stretching thereof. The differential feeding mechanism operates in the usual manner on the fabric. The specific feeding mechanism shown and described forms no part per se ofthe present invention but is shown and described in an application filed on the 26th day of June, 1928, Serial Number 288,419. p Stitch forming mechanism The material is fed across the work sup.-

port to be stitched by a stitching mechanism which forms overseaming stitches. Tliis stitch forming mechanism includes a needle 28 carried'by a needle bar-29.: The needle bar 29 is mounted for reciprocation in'a sleeve bushing 30. The sleeve bushing 30 is rigidly -bushing-is secured in theneedle head by means of a set screw 33. At the upper end of the needle bar there is a collar 34 which car- 'riesaprojectingpin 35 and a link 36 engages a said pin. This pin 35 projects beyond the link 36 and is sla'bbed so' as to form parallel faces as indicated at 37 in Fig. 7 This projecting portion of the pin 35 slides freely up and down in a guiding recess 38. The guiding recess is formed by a projecting ledge 39 integral' with the needle head and a plate 40 which. is secured to the needle head. The

- plate and ledge are spaced so as to form the recess 38.- This constructionaifords a means for guiding the upper end of the needle bar ed solely by the sleeve bushing referred to above. i The link 36 at its other end is connected to a crank 41 carried by a disc 42 formed as a part ofthe actuating shaft 6. As the actuating shaft rotates, the needle bar will be reciprocated in its supporting bushing.

Cooperating with the needle beneath .the work support is a thread carrying looper 43. Said thread carrying looper 43 is mounted on-a looper carrier 44. This looper carrier 44' is mounted on a shaft 45, and the shaft 45 is mounted in suitable lugs of the machine.

' Cooperating with thelooper 43 beneath the work support and needle above the work carried by the bed support is an overedge threadcarrying looper 7.,

46. This looper is mounted on a'looper carrier 47 which is clamped-to a shaft 48. The shaft is journaled in the lugs 49, 49 (see Fig. 1). The looper carrier 47 is provided with a projecting arm 50 and a link 51 is pivotally connected to this arm at its outer end and also pivotally connected to the looper carrier 44. This connection between thelooper carriers causes one carrier to operate the other.

. The shaft 48 is oscillated and will impart os- I.

' cillations to the looper carrier 47, and this, in turn, will impart-oscillationslto the looper carrier 44. These parts are so timed that the needle will pass through the material and throw out itsneedle thread loop so that the The overedge looper, passes alongside of this thread formedthereby. The overedge looper moves over the work support to a position so that the needle on its next descent will enter the loop of thread formed by said overedge loo er. The needle bar reciprocates in a line inc ined to the plane of the work support, both of the loopers oscillating in planes per-' underthread' looper 40 will enter the same.

" underthread looper 40 and enters the loop of 4 memos 52 whichis rigidly attached to the shaft. A

link 53 is connected to this arm, and at its other end is connected to a lever 5d fulcrumed at 55 on the bed of the machine. Said lever 54 carries a ball stud 56 intermediate its ends. An eccentric strap 57 engages said ball stud and this eccentric strap cooperates with an eccentric 58 on the main shaft 6. It will be noted that the ball stud 56 lies in a plane directly beneath the center of the shaft 6 as indicated in Fig. 3 of the drawings, and thus it is that said-lever which imparts oscillations toboth of the loopers is operated by a direct connection with an eccentric on the main Trimming mechanism The fabric is trimmed prior to the overedging of the same, and this is accomplished by a trimming .llll JlliLIllSID which includes a stationary trimming blade 59 and a movable trimming blade 60. The stationary trimming blade is fixedto a supporting member 61 which is mounted in a bracket 62 carried by the bed of the machine. This member 61 i is capable of endwise adjustment in its supporting bracket and is adjusted by means of a screw 63. Said member is clamped in its adjusted positions by a set screw 64. The movable blade is carried by a lever arm 65. which is fulcrumed on a supporting member 66 rigidly connected to the bracket 14. Said lever arm has a relatively long hub member which engages the support and this causes the lever arm to swing in a vertical plane. The movable trimming blade is carried by a head 67 which is mounted on a rod 68. The rod 68 is freeto reciprocate in the yoke head 69 at the outer end of thelever arm 65. A spring 70 is coiled about this rod and bears at its outer end against one member of the yoke head. This spring at its other end bears against the collar 71 fixed to the rod 68. The spring normally presses the movable trimming blade laterally against the stationary trimming blade and thus holds the blades in shearing contact with each other. Suitable means is provided, of course, for preventing the member 68 from turning in the yoke head so that the movable blade will be held in proper position to cooperate with the stationary blade.

The lever arm 65 is oscillated by means of an eccentric strap I72 which cooperates with an eccentric 7 3 on the actuating shaft 6. This eccentric strapis connected to a ball 'stu'd 74 'attachedto the lever arm 65 by suitable lock nuts 75. "This stud projects beyond the ball'head thereon with which the eccentric strap cooperates andthe link 27 is connected thereto. Thus, it is that the eccentric strap 72 not only oscillates the lever arm supporting the movable trimming blade, but it also moves the link 27 endwise and raises and lowers the feed dogs. It will be noted that the link'27 is in a measure an extension of the eccentric strap 7 2,thatis,they are'substantially in alignment. It will also be noted that the connection to the arm supporting the trimming blade is at a point directly beneath the actuating shaft, and these parts are directly connected'to said actuatingshaft. A downward movement of the eccentric strap 7 2 will impart a downward movement to the lever arm carrying the trimming blade, and this will cause a severing of the-fabric. downward movement of the eccentric strap imparts an'idle movement to the feed dogs,

as it lowers the feed dogs from engagement with the material. An upward movement of the eccentric strap will raise the feed dogs and as the feed dogs work against a 'presser foot which is spring pressed downward, the strain incident to the operation of the feed dogs comes on the eccentric during this upward movement of the eccentric strap. At this time, the trimming blade is on its idle movement. Thus, it is that the eccentric cooperating with the eccentric'strap 72 will perform its work at substantially diametrically opposite points. This not .only distributes the work on the shaft, but also aids in the counterbalancing of the lateral strains on the shaft.

The trimmedoif stri is caused to engage a deflecting cover plate ti which protects the operating parts beneath the work support and the strip is deflected forwardly toward the front of the machine.

Presser foot mechanism V The material is held on the work support by a presser foot 77. This presser foot is carried by an arm 78 which is mounted on a shaft 79. The shaft 79 is, turn, journaled in the standard'3, and extends outside of the standard. The portion of the shaft outside of the standard is provided withan arm 80 which is rigidly connected thereto. Also mounted on the outer face of the standard 3 is a lift lever 81. Said lever is fulcrumed at 82, and is provided with a projecting end 83 which lies underneath the arm 80. This lift lever is connected through suitable means with a treadle or knee shift. A spring 84 coiledabout the pivotal sup ort for the lift lever is engaged with said ever at one end anda pin or abutment 85 at its other end,

This a The spring normally turns the lever-in a clockwise directionas viewed in Fig. 1.

When the outer end of therlift lever is dey pressed it will-engage the arm carrying the presserbar and raise the same. A' coil sprin 86 located in a suitable re cess in vthe nee lehead and bears against the upper face of the arm 78. The upper end of 4 trimming mechanism,-will trim the material i ,ing mechanism as shown will form a three the coil spring 8t engages a threaded sleeve 87 and by adjustmg this sleeve in the needle head the tension on the spring may be varied.

The operation of the machine, is thought to be obvious from the above description. The fabric .is placed on the work support un-- derneath the presser foot and will be fed in a direction at an angle slightly acuteto a vertical plane containing the axis of the actuating shaft. As shown in Fig. 3 the direction shown in this gure,'and also longitudinally of the feed bars .shown in this figure. The

before it reaches the stitching mechanism, and the trimmed-off strip will be, deflected toward the front of the machine. The stitchs -all completely housed. The actuated parts for moving the feed dog back and forth include the bracketarmcarried .by the feed rocker and the end of this arm is-directly beneath the; actuating shaft.' The actuated parts for raising and lowering the feed bars include a ball stud on the lever arm carrying the trimmer and this is directly beneath the loopers include the rock shaft carrying a ball stud which is likewise directly beneath the actuating shaft. Thus, it is that devices cooperating with the eccentric members on the actuating shaft will impart. a downward vertical thrust to theserespective actuated trains of mechanismsf The three eccentric members which accomplish the actuation of these parts are mounted-on the shaftbetween the bracket arms in which the shaft is journaled- Theneedle bar is'also actuated by a I 'offeed is lot; 'tudinally'of the feed dogsf.

'mechanisms described; the term eccentric actuating shaft. The actuated parts for the direct thrust from an eccentric member'o n the end of theshaft. Thus, it is that the power effort of the actuating shaft is distributed along the shaft and so balanced that the shaft will run very smoothly and freely even at high speed and with little or no vibration incident to the actuation of the parts of the machine.

y; The coven plate for theneedle mechanism indicated in broken lines in Figs. 1 6.

There-is a cover plate attached by suitable screws threaded into the openings 88 and this cover plate will cover'the shaft and the actuated parts directlybeneath the same. The

work sup ort' is mounted toswing about a vertical p1vot'89- locatedat the rear of themachine and said work support isheld in closed positionby'means of a yielding latch I 90 which cooperates with aprojection 91 on the bracket 62 Suitable tension devices 92. and 93 are provided for the looper threads and-the looperthreads pass through suitable guides and the oscillating devices 94and 95 respectively to the loopers. The needle thread passes through a tension 96 and through, suitable guides and controlling devices therefor. The thread.handling devices associated with the needle and loopers form no art of the present invention and will not be urther described. While we have shown eccentrics and cooperating eccentric straps for actuating the feeding mechanism, trimming-mechanism and complemental stitch forming devices, and have shown acrank for operating the needle bar, it will be understood that other forms of actuating. members may be substituted for thesespecific forms 50 long as said actuating membersare of a character'which will transform the rotary motion of the actuating shaft into-the desired back and forth motion necessary to operate the members where used throughout our' de-.

.scription and claimsdefines such afluating member s;v While I we have shown and described in detail an overedge stitch forming mechanism,and the present invention is particularly adapted foroperatin such mechanisms as is necessary tofeed t e fabric and form the overedge stitch, it will be understood that from certain aspects of the invention, other types of stitch forming mechanism may be used, and other types of feeding mechanismimay be used-without departing from the. spirit of the invention as set forth in the a pended claims. It will be obvious that tli "arrangement of the shaft above the work support and in rear; of the stitching point and extending in the general direction of the line of feed, lends itself particularly to the direct'operation oft-he feedingme'chanism and the parts of the stitching mechanism which are beneath the work support by direct con-- nectionstherewith fromthe actuating shaft,

.as Well as the direct operation of-the needle bar which is above'the'work support. By

placing the'standard at one side of the line of feed and inclining the shaft in the manner described, the actuating parts transmitting motion from the actuating shaft to the parts beneath the work support, may also be placed at one side of the line of feed, and thus give ample clearance'for the fabric being stitched v to pass continuously through the machine.

'of feed whereby clearance for the material When the stitching is confined to the edge of the fabric, only a small clearance space is necessary, and therefore, the standard and actuated parts may be placed comparatively close to the line of feed and a very efi'ective arrangement obtained for driving the parts beneath the work support- It is obvious that minor changes in the details of construction'and arrangement of the parts may be made Without departing from the spirit of the invention as set forth in the appended claims. I

7 Having fully described our invention, what we claim as new and desire to secure by Letters. Patent, is

1. The combination of a work support, a stitch forming mechanism, a feeding mechanism, an actuating shaftarranged above the plane of the work support and disposed so as to extend in the general direction of the feed and located substantially in rear of the sitching point, actuating members carried by said shaft and devices operated thereby for operating, respectively, the feeding mecha nism and the stitching mechanism, and a supporting standard for the actuating shaft arranged to one side of the line of feed whereby clearance for the material being stitched is afforded.

2. The combination of a work support, a stitch fofming mechanism, a feeding mecha nism, an actuating shaft arranged above the I plane of the work support and disposed so as to extend in the general direction of the feed and located substantially in rear of the stitching point, actuating members carried by said shaft and devices operated thereby for actuating the parts of the feeding mechanism and stitching mechanism beneath the work support, and a supporting standard for the actuating shaft, said standard and said devices being arranged to one side of the line being stitchedis afforded.

3. The combination of. a work support, a stitch forming mechanism, a feeding mechanism, an actuating shaft arranged above the planeof the work support and extending in the general direction of the feed, said shaft being located substantially in rear of the stitching point and disposed in a vertical plane cutting the line, of feed at an acute angle at the stitching point, actuatingmembers carried by saidshaft, devices operated thereby for operating, respectively, the feeding mechanism and stitching mechanism, and a supporting standard for the actuating shaftarranged to one side of the line of feed whereby clearance for the material being stitched is afforded;

4. The combination of a work support, a

stitch forming mechanism including a needle bar and a needle carried thereby, a complemental stltch formmg mechanism mounted beneath the work support, a feeding mechamenace nism mounted beneath the work support, an

actuating shaft arranged above the planeof' the work support and disposed so as to extend in the general direction of. the feed and located substantially in rear of the stitching point, actuating members carried by said shafts, and devices operated thereby for opcrating-the complemental stitching mechanism and the feeding mechanism, an actuating device carried by the shaft for operating .the needle bar, and a standard for supporting the actuating shaft, said standard and devices for operating the parts beneath the work support being disposed at one side of the line of feed whereby clearance for the material being stitched is afforded.

5. The combination of a work support,'an

over-edge stitch forming mechanism, a feeding mechanism, an actuating shaft arranged in rear of the stitching point and in a vertical plane at an acute angle to the line of feed and carrying actuating members, and devices directly connected to the actuated parts .of the stitch forming mechanism and feeding mechanism and cooperating with said actuating members.

6. The combination of a work support, an

overedge stitch forming mechanism, a feeding mechanism, a trimming mechanism, an actuating shaft arranged in rear of the stitching point and in a vertical plane at an acute angle to the line of feed and carrying actuating members, and devices directly connected to the actuated parts of the stitch forming mechanism, feeding mechanism, and trimmingmechanism and cooperating with said actuating members.

7. The combination of a work support, an overedge stitch forming mechanism, a feeding mechanism. an actuating shaft arranged in rear] of the stitching point and in a vertical plane at an acute angle to the line of feed and carrying actuating members, and devices directly connected to the actuated parts of the stitch forming mechanism and feeding mechanism and cooperating with said actuating members, said devices being disposed substantially in a vertical plane and operating the actuated parts by a direct thrust thereon.

8. The combination of a Work support, an overcdge stitch forming mechanism, a feeding mechanism, a trimming mechanism, an actuating shaft arranged in rear of the stitching point and in a vertical plane'at an acute angle to the line of feed and carrying eccentric members, and devicesdirectly connected to the actuated parts of the stitch forming mechanism, feedin mechanism, and trim ming mechanism and cooperating with said eccentric members, said devices being disposed substantially in a vertical plane and operating said actuated parts by a direct thrust thereon.

9, Thecombination of a bed plate, a work support carried thereby, an overed ge stitch forming mechanism, a feeding mechanisin, a

standard carried by the bed plate andhaw ing spaced laterally projecting bracket arms,

an actuating shaft journaled in said bracket arms and arranged in'a' vertical plane at an acute angle to the line of feed, said shaft hav-- ing eccentric members thereon between said bracket arms and an eccentric member on the end of the shaft, devices directly connected to the actuated parts of the stitch forming mechanism and feeding mechanism and cooperating with said eccentric'members.

10. support carried thereby, an overedge stitch Y forming mechanism, a feeding mechanism, a

trimming mechanism, said bed plate having a standard lying in a plane parallel with the line of feed and having laterally projecting bracket arms, an actuating shaft journaled in said bracket arms anddisposed in avertical plane at an acute angle to the line of feed, eccentric members on said shaft between said bracket arms, an'eccentric member on the end'of the shaft, and devices directly connected to the actuated -parts of the stitch forming mechanism and feeding mechanism and cooperating with said eccentric members.

1 1, -The combination of a bed plate, a work support carried'thereby, an overedge stitch forming mechanism, a feeding mechanism, a

1 trimming mechanism, a standard carried by said bed and having spaced laterallv projecting bracket arms, an actuating shaft ournaled insaid bracket arms and arranged in a vertical plane at an acute angle tothe line of feed, eccentric members carried by said shaft between said bracket arms, an eccentric member on the end of said shaft, and devices directly connected to the actuated parts of the'stitch forming mechanism, the feeding mechanism, and trimming mechanism andcooperating with said eccentric members.

- support-carried thereby,

. tical plane at-an'acute angle to the line of 12. The combination of a bed plate, a work an overedge stitch forming mechanism, a feeding mechanism, a trimming mechanism, said bed plate having a standard lying in a. plane parallel with the line of feed and having laterally projecting bracket arms, an actuating shaft journaled in said bracket arms. anddisposed in a ver feed, eccentric members on said shaft between said bracket arms, an eccentriclmember on the end of the shaft, and devices directly connected to the actuated parts of the stitch forming mechanism and feeding-mechanism and cooperating with said eccentric members, said devices beingdisposed substantially in a vertical plane whereby the actuated parts are operated by a. direct vertical thrust from said eccentric members.

' 13. The combination of a bed plate, a work.

support carried vtha areby, an overedge stitch trimming mechanism,

The combination of bed-plate, a worka feeding mechanism, a a standard carried by said bed plate and having spaced laterally projecting bracket arms, an actuating shaft forming mechanism,

,journaled in said bracket arms and arranged in a vertical plane at an acute'angle to the line of feed, eccentric. members carried by said shaft between said bracket arms, an eccentric member on the end of said shaft, and devices directlyconnected to the actuated parts of the stitch formingmechanism, the feeding mechanism, and trimming mechanism and cooperating with said eccentric members, said devices being disposed substantially in a vertical -plane whereby the actuated-parts are operfeed, an eccentric member on the end of the shaft and a link directly connecting said eccentric member to the needle bar, an eccentric member on saidshaft intermediate-the ends thereof, a devic'e cooperating therewith and directly connected'to the actuated parts of the complemental stitch forming. mechanism, and a means for operating the feeding mechanism from said shaft.

v 15. The-combination of awork support,

a needle bar, a needle carried thereby, a' complemental overedge stitch forming mechanism mounted beneath the work support, a four motionfeeding mechanism mounted beneath the. work support, an actuating shaft arranged above the work support in rear of the stitching point and in avertical plane at an acute angle to the line of feed, an eccentric member at the end .of the shaft, a link connecting said "eccentric me'mber to the needle bar, eccentric members carried by the shaft intermediate the ends thereof and devices operated thereby for operating the actuated parts of the complemental stitch forming mechanism and the actuated parts of the four motion feeding mechanism.

16'. The combination. of a work support, a needle bar, a needle carried thereby, a complemental overedge stitch forming mechanism, a four motion feeding mechanism, a trimming mechanism including a movable trimming blade, an actuating shaft arranged above the work support and in a vertical: plane at an acute angleto the line of feed, an eccentric member on the end of the shaft, a link connecting the same to the needle bar, a second eccentric member on the shaft, a device connecting said second eccentric member directly to the actuated parts of the complemental stitch forming'mechanism, a third eccentric member on said shaft, devices for connecting said third eccentric member directly to the actuated parts of the feeding mecl 1anism for, imparting feed movements thereto, a fourth eccentric member on said shaft and devices for connecting said fourth V eccentric member directly to the actuated mechanism.

parts operating the movable trimming blade and the actuated parts for raising and lowering the feed dog's. a

17. The combination of a work support, an overed'ge stitch forming mechanism, a feeding mechanism including a main feed bar, a feed rocker, an arm carried by said rocker and projecting therefrom, an actuating shaft arranged in rear of the stitching point and in a vertical plane at an acute angle to the line of feed, the end of said arm lying substantially in said plane, an eccentric member on the shaft, a device operated by said eccentric member and directly connected to said arm for oscillating the rock shaft, means actuated by said shaft for raising and lowering the feed bar, and means actuated by said shaft for operating the overedge stitch forming 18 The combination of a work support, an overedge stitch forming mechanism, a feeding mechanism'including a main feed bar, a feed rocker, an arm'carried by said rocker and projecting therefrom, an actuating shaft I of the same, and a means for actuating said trimming mechanism from said shaft.

19. The combination of a Work support, a

needle bar, a needle carried thereby, a C0111? plemental overedge stitch forming mechanisin, actuated parts'therefor, including a lever having a ball stud, an-actuating shaft located above the work support in rear of the stitching point and in a vertical plane at an acute angle to the line of feed, said ball stud being disposed in said vertical plane,

an eccentric member on said shaft, a device actuated thereby and connected tosaid ball stud, means for operating the needle from sa d shaft and means for operating the feed from said shaft.

20. The combination of a work support, an overedge stitch-forming mechanism, a fecdingmechanism including a feed bar, a trimming mechanism includinga movable trimmin blade, a lever arm carrying said movable'blade, a ball stud mounted on said lever arm, means for raising and lowering said feed bar from said ball stud, an actuating shaft-arranged above the work support and in a vertical plane at an acute angle to the line of feed, said ball stud being disposed substantially in said vertical plane, an eccentric member on said shaft, a device cooperating therewith .and connected to said ball stud, means operated by said actuating shaft for moving the feed dog back and-forth, and

means actuated by said shaft for operating i a vertical plane at an acute angle to the line of feed, ,a feeding mechanism, a needle bar, a needle carried thereby, a complemental overedge stitch forming mechanism, a sleeve bushing carried by one of said bracket arms in which said needle bar reciprocates, a collar on the upper end of said arm and an'eccentrie member on the end'of the shaft, a link connecting said eccentric member to said collar, means actuated by the shaft for operating the feeding mechanism, and means actuated by said shaft for operating the complemental overedge stitch forming mechanism. a

22-. The combination of a bed plate, a work support carried. thereby, a standard carried by said bedand having spaced laterally pro- ,jecting bracket arms, an actuating shaft journaled in said bracket arms and disposed in a vertical plane at an acute angle to the line of feed, a feedingimechanism', a needle bar, a needle carried thereby, a complemental overedge stitch forming mechanism, a sleeve bushing carried by one of said bracket arms inwhich said-needle bar reciprocates, a collar on the upper end of said arm'and an eccentric member on the end of the shaft, a link connecting said eccentric member to said collar, means actuated by the shaft for operating the feeding mechanism, and means actuated by said shaft for operating the complemental overedge stitch forming mechanism, said collar on the needle bar having a projecting member and said bracket arm carrying the bushing having a guiding recess for said member which prevents the needle bar from oscillating in its reciprocation s.

23. The combination of a work support, an overedge stitch forming mechanism, a feeding mechanism including a feed bar, a feed dog carried thereby, a trimming mechanism including a movable trimming blade, an ac tuating shaft arranged in a vertical plane at an acute angle to the line of feed, an eccentric member carried by said shaft, a device cooperating with said eccentric member and connected to said movable trimming blade and to said feed bar forraising the feed dog on the upward movement of said device, and for actuating the trimming blade to sever the fabric on the downward movement of the of the stitch forming mechanism, the differential feeding mechanism and the trimming mechanism and cooperating with said eccentric members. T i

25. Thecombination of a supporting brackot, spaced bracket arms projecting laterally therefrom, an actuating shaft'journaled in said bracket arms and carrying an actuating belt wheel at oneend thereof, a needle bar located in a vertical plane containing the axis of said shaft and at -the opposite end from saidbelt wheel, an eccentric member on said shaft, a link connecting said eccentric member to said needle bar, a work support, a feed ing mechanism,""sai d.feeding mechanism being disposed so as to rfeed the material in aline at anacute angle tea-vertical plane containing the needlebar and axis of' theshaft, a complemental stitch forming mechanism, means operated by the shaftfor actuating said feedingmechanism and means operated frorhthe shaft for actuating the complemental stitch forming mechanism.

26;; ;The combination of a work support, a stitch forming mechanism, a feedi'n mech- "anism including a feed rocker located eneath the work support, a feed bar connected to the feed rocker, an' actuating shaft arranged above the work support in rear of the stitching point and in a vertical plane at an acute angle to the line of feed, means operated by i i said shaft for actuating the stitch forming mechanism, a device directly connecting said shaft and feed rocker for oscillating the feed rocker, and devices actuated by said shaft and connected to said feed bar for. raising and, lowering the same, said last-named-devices being arranged substantially in a straight line sons to provide a direct lifting thrust for the feed bar.

27. The combination of a work support, a stitch forming mechanism including a needle and a looper cooperating with the needle beneath the work support, a feeding mechanism including a feed rocker, a feed bar connected to the feed rocker, -an actuating shaft arranged above the work support in rear of the stitching point and in a vertical plane at an acute angle to the line of feed, an eccentric member on the end of the shaft'for actuating said needle bar and eccentric members intermediate the ends of the shaft for actuating devices for oscillating the feed-rocker, lifting the feed bar and imparting-oscillations to thelooper. v v w I c 28. The combination ofa work support a stitch forming mechanismnncluding a nee e and a looper cooperating with theneedle beneath the work support, a feedingmechanism including a feed rocker, a feed bar connected to the feed rocker, an actuating shaft ar-.

ranged above the work support in rear of the stitching point and in a vertical plane at an acute angle to the, line of feed, an eccentric member on the end of the shaft for actuating said needle bar, and eccentric members intermediatethe ends of the shaft for actuating devices foroscillating the feed rocker, lift-- ing the feedbar and imparting oscillations to the looper, all of said devices actuated by said eccentrics being disposed substantially in a vertical plane containing the axis of the shaft. v

29. "The combination of a work support, a feeding mechanism, an overedge stitching mechanism including a needle bar and a needle carried thereby, said needle bar being disposed in a line inclined rearwardly'from the stitching point, and complemental stitch forming mechanisms mounted beneath the Work support and cooperating with said needle, an actuating shaft arranged above the plane of the work support and disposed so as'to extend in the general directionpf the feed and located in rear of the needle-bar and in a line at right angles to the line of rec1pro-- cation of the needle bar, means for reciprocating said needle bar. from said shaft, actuating members carried-by said shaft, and devices operated thereby for operating the feeding mechanism and the complemental stitch forming mechanism beneath the work support, said devices being disposed at one side of theline of feed whereby clearance for the material being stitched is afforded.

30. The combination of a work support, a feeding me'cha ni sm, an overedge stitching mechanism including a needle bar and a needle carried thereby, said needle bar being disposed in a line inclined rearwardly from the stitching point, and complemental stitch forming mechanism mounted beneath the I work support and cooperating with saidneedle, an actuating shaft arranged above the plane of the work support and disposed sosupport, and a standard for supporting saidactuating shaft, said standard and said devices being disposed at one side of the line of feed whereby clearance for the material being stitched is afforded.

81. The Combination of a work support, a needle, a looper cooperating with the needle beneath the work support, a looper cooperating with the first-named looper and with the needle above the work support to form overedge stitches, a feeding mechanism including a main feed dog and an auxiliary feed dog having a differential feeding movement, an actuating shaft arranged above the plane of the work support and disposed so as'to extend in the general direction of the feed and located substantially in rear of the stitching point, =actuating members carried by said shaft, and devices operated thereby for operating, respectively, the needle, lOopers and .the feed dogs, and a supporting standard for the actuating shaft arranged to one side of the line of feed whereby clearance for the material being stitched is afforded.

82. The combination of a work support, a needle, a looper cooperating with the needle beneath the work support, a looper cooperating with the first-named looper and with the needle above the work support to form overedgecstitches, a feeding mechanism including a main feed dog and an auxiliary feed dog having a differential feeding movement, an actuating shaft'arranged above the plane of the work support and disposed so as to extend in the general direction of the feed and located substantially in rear of the stitching point, actuating members carried by said shaft, and devices operated thereby for operating, respectively, the needle, loopers and the feed dogs, and a supporting standard for the actuating shaft, said standard and said devices operated by-said actuating member and imparting movements to the parts beneath the work support being arranged to one side of the line of feed whereby clearance for the material being stitched is afforded.

33.,The combination of a'work support, a stitch forming mechanism, a feedingmechanism including a feed rocker located beneath the work support, a feed bar connected to the feed rocker and carrying a feed dog, an actuating shaft arranged above the work support and disposed so as to extend in the general direction of feed and located substantially in rear of the stitching point, a supporting standard for the actuating shaft arranged to one side of the line of feed whereby clear ance for the material being stitched is af forded, devices operated'by said shaft for acutating the stitch forming mechanism, devices actuated by said shaft for raising and lowering the feed dog, an arm carried by the feed rocker, an eccentric on said actuating shaft, an eccentric strap cooperating with said eccentric, means for connecting said eccentric strap to said arm whereby said connection may be shifted lengthwise of the arm for varying the stroke of the feed dog, said arm extending in a direction substantially lengthwise of the shaft whereby the stroke of the feed dog may be varied without disturbing the timing of the feed dog.

34. The combination of a work support, a stitch forming mechanism, a trimming mechanism including a movable member carrying a trimming blade, a feeding mechanism including a feed bar carrying a feed dog, an actuating shaft arranged above the work support and disposed so as to extend in the general directionfof the feed and located substantially in rear of the stitching point, a supporting standard for the actuating shaft arranged to one side of the line of feed Whereby clearance for the material being stitched is afforded, devices operated by said shaft for actuating the stitch forming mechanism, devices actuated by said shaft for moving the feed bar back and forth, an eccentric on said shaft, an eccentric strap operated thereby and connected to said member carrying the trimming blade for raising and lowering the trimming blade, and devices connected to said movable member carryingthe trimming blade and said feed bar for raising and lowering the feed dog while permitting said feed'bar to move back and forth.

In testimony whereof, we affix our signatures.

NORMAN V. CHRISTENSEN. FREDERICK F. ZEIER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2554970 *Aug 30, 1946May 29, 1951Solomon AdlerSewing machine pressure bar
US2790405 *Feb 27, 1952Apr 30, 1957Singer Mfg CoTrimmer mechanisms for sewing machines
Classifications
U.S. Classification112/162, 112/221
International ClassificationD05B15/00
Cooperative ClassificationD05B15/00
European ClassificationD05B15/00