US2448774A - Sewing machine - Google Patents

Description

M. L. COOK Y SEWING MACHINE Sept. 7, 1948. 2,448,774

Filed Dec. 28, 1946 5 Sheets-Sheet l FIGZ.

I INVENTOR. I MART/N L. Coon ATTORNEY Sept. 7, 1948.

Filed Dec. 28, 1946 7 h illll-llll M. L. COOK l SEWING MACHINE 5 Sheets-Sheet 2 1 uni! Z [III // I HIIIII U T IN VEN TOR.

MART/N L. Goo/r! A 14.?" T ORNEY A :jiiIiI HiiIiiHH-HHIL Sept. 7, 1948. M. COOK 2,448,774

SEWING MACHINE I Filed Dec. 28, 1946 5 Sheets-Sheet 5 IN VEN TOR. MARr/NL. 000/1 ATTORN Sept. 7, 1948. I M. L. cooK 4 8,

SEWING MACHINE Filed Dec. 28, 1946 s Sheets-Sheet 4 I FIG-8. flART/wyf ak ATTOEZYE M. L. COOK SEWING MACHINE Sept. 7, 1948.

5 Sheets-Sheet 5 Filed Dec. 28, 1 946 INVENTOR. /WJ4RT/NL.C00K

ATOEZKE'Y Patented Sept. 7, 1948 SEWING MACHINE Martin L. Cook, (Dhicago, 111., assignor to Union Special Machine Company, Chicago, Ill., a corporation of Illinois Application December 28, 1946, Serial No. 719,059

13 Claims.

This invention relates to cup feed sewing machines and more particularly to puller means applied to such machines to assist in feeding the work and retaining it in proper relation to the feed cups.

A primary object of the invention has been to provide puller means arranged to cooperate with one of the feed cups, at a point beyond the point of stitch formation, for advancing the work away from the bight of the feed cup and adapted to be shifted under foot or knee control into an inactive position to facilitate the adjustment of dicated character. which may be readily applied to existing cup feed machines without the necessity of modifying their present construction. This has, in fact, been accomplished without the ne- ,cessity of drilling new holes or performing other machining Operations on the frame of the existing basicmachine selected for the illustrative embodiment of the invention.

In the preferred embodiment of th invention the arrangementis such that as one of the feed cups is shifted away from the other, by the op- ,eration ofafoot needle or the like, to enable theadjustment of the work or the insertion of anew piece of work between the cups,the puller means is also shifted away from its associated feed to further facilitate the handling of the work. More space is thus provided in the region .Of the feed cups for the manipulation of the work by the fingers of the operator. Other objects, features, and advantages of the invention will appear from a detailed description of several illustrative forms of the same which will now be given in conjunction with the accompanying drawings, in which:

F ure 1 is a view, partly in rear elevation and partly in vertical section, of a machine embodying the present invention, a supporting table therefor being also indicated in section; ,Figure 2 is a detail view in elevation of an overhanging arm portion of the machine; Figure 3 is .an end elevation of the machine, asviewed from the right in Figure 1, certain parts being broken away to illustrate the construction more clearly; I

Figure 4 is an enlarged horizontal section taken along the line 4-4 of Figure 1, the puller means 2 being shown in its active position in full lines and in its inactive position in brokenlines;

Figure 5 is a detail view in section along the line 55 of Figure 4.; I

Figure 6 is a sectional view, taken along the line 66 of Figure 4, showing the puller means in side elevation;

Figure 7 is a detail view, in plan, of aporltion of the frame of the machine with the top cover removed;

Figure 8 is a rear elevational view of a portion of a machine similar to the one illustrated in Figure 1 but showing a modified puller construction; r

Figure 9 is a horizontal sectional view taken along the line 99 of Figure 8; v

Figure 10 is a detail view of a fragmentary portion of the machine, as viewedfrom the right end ofFigure 8, showing the modified arrangement for supporting and operating the puller means; and

Figure 11 is a detail view in elevation, of a portion of a further modified form of puller means. V

The machine illustrated in connection with both embodiments of the invention is of the general type disclosed in the Hacklander Patent No. 2,043,749, granted June 9, 1936. It comprises ."a main frame Ill arranged to support the various operating mechanisms and to house and to pro,- vide automatic lubrication for a portion of these mechanisms. This main frame includes a vertical standard portion arranged to be supported in any suitable way, as by resting upon the surface of a work table, such as indicated at H in Figure 1. At the top of the vertical standard the frame has a laterally extending overhanging arm 12. A main operating shaft I3 is provided horizontally Within the vertical standard and is pref.- erably provided with a combined handwheel and pulley Idat each end, exterior of the frame. Power may be supplied to either of the pulleys M by means of a belt 15 adapted for connection in a conventional manner with any suitable source of power, such as an electric transmitter (not shown) mounted beneath the table I l The work, such as hosiery, or the like, intended to be stitched upon the operation of the machine and given an overedge type of seam, is fed through the stitch forming Zone by means of a pair of feed cups l6 and I1. These are secured by set screws or the like to the lower ends of shafts l8 and!!! depending from the overhanging arm 12 of the frame. The stitch forming, devices include a horizontally reciprocable needle 20 and a pair of loopers 2| and 22, all arranged to be given their stitch forming movement by mechanism, of the type disclosed in said Hacklancler patent, driven from the main shaft 13. A suitable uncurler 23, of conventional construction, may be provided for assisting in directing the work correctly into the path of the feed cups.

The shaft IQ for the outer feed cup is journalled within a sleeve 24 carried by a clamping member or retainer 25 which is pivotally support ed in the overhanging arm l2 by means of a stud 26. Secured to this stud is a bell-crank lever 21 the free end of a horizontally disposed arm of which is engaged by a compression spring 28. The

opposite end of the spring abuts against an ad- 1 justable C-frame 29 which is carried at the upper end of a threaded sleeve 30 cooperating with a threaded opening in a lug extending outwardly from the frame ID. The sleeve may be adjusted to any desired position by turning a knurled head 3| at its lower end and may be locked in adjusted position by a knurled nut 32. Spring 28 surrounds and is retained by the upper portion of a rod 33 which passes upwardly through the sleeve and is provided adjacent its upper end with an elongated opening 33a that receives a reduced portion at the end of the horizontal arm of the lever 21. Secured to the rod 33 between the arms of the C-frame 29 is a collar 34. A spring 34a. acting at one end against this collar and at the other end against the lower arm of the C-frame serves to urge the rod into a position in which the collar 34 engages the upper arm of the C- frame. At this time the upper edge of the opening 330 has a slight clearance with respect to the end of the lever 21 so that the latter is freely rocked by the spring 28 into its extreme clockwise position (Figure 1) Rod 33 may be moved downwardly in opposition to spring 340. by suitable connections including a chain 35 connected stud 38 having a slotted head accessible from the exterior of the frame. A similar eccentric 39 adjustable exteriorly of the frame by means of a headed stud 40 serves to determine the limit of movement of the lever 21 in the opposite direction. Such movement may be brought about by grasping the outer cup I1 and swinging it outwardly or, as is customary in the operation of machines of this type, it may be brought about by the downward movement of the rod 33, in opposition to the spring 34a, by means of the treadle or kneecontrolled chain 35.

A plate-like puller member 4|, having a, bentover ear 41a, is secured through the latter, by means of a screw 42, to a lever 43. The latter is pivotally mounted, by means of a large headed screw 44, upon a bracket 45. This bracket projects horizontally from the forward face of the vertical standard and has a vertically extending portion 46 which is secured to the standard by means of a, pair of screws 41. Lever 43 has a rearwardly extending arm 48 provided in one edge with a series of notches 49 arranged to receive the hooked end of a tension spring 50. At its opposite end this spring is secured to a screw or stud 5| carried by the bracket 45. This arrangement is such that the spring 53 normally rocks the lever 43 into the position indicated in full lines in Figure 4. The tension of the spring 50 may be varied to a certain extent by selection of an appropriate one of the notches 49.

Puller member 4| serves to urge the work yield-- ingly against the periphery of the outer feed cup [1 and thus assists in the feeding of the work. It constitutes, in effect, an auxiliary feed beyond the point of stitch formation and thus exerts a puller action upon the work. The outer end of the puller member is preferably formed with a deep notch or slot across which extends a cutting edge 52a provided on a separate flat blade 52 which may suitably be retained against one face of the puller member by overturned tabs 53 and '54. This arrangement is such that a guarded cutting edge, disposed in a vertical plane and inclined toward the operator from the vertical, is provided closely adjacent to the point of stitch formation. It enables the chains of stitching between successive articles to be severed with a simple movement of the hand and with a minimum wastage of thread. The opposite end of the puller member is preferabl provided with a curved portion 55 which extends beneath the inner feed cup l6 and a similar but shorter tail or projection 56 which extends over the upper edge of the rim of the feed cup l6. These portions of the puller member assist in guiding the work properly into the path of the feed cup :1 at the point where it is engaged by the puller member. Jamming of the work between the periphery of feed cup 15 and the inner edge of the puller member is eifectively prevented.

Provision is made for the automatic swinging of the lever or arm 43 against the action of the spring 50 to carry the puller member from the full line to the dotted line position indicated in Figure 4. For this purpose a screw 51 is carried by the lever and extends downwardly therefrom. It is locked in place by means of a lock nut 58. A chain 59 or other flexible connection is provided between the chain 35 and the screw 51. At its upper end chain 59 is connected by a small Wire clip 50 directly with the screw 51, while at its lower end it is correspondingly connected with the chain 35 by means of a wire clip 62. To guide the chain 59 and retain it in a position. in which it will not interfere with the movement or manipulation of the work, a tubular retainer BI is provided. This may suitably have the configuration indicated in Figures 1, 3, and 4, the end of the tube being bent and directed toward screw 51. It may be supported in any suitable way, as by welding or otherwise securing it to the lower edge of the bracket 45. As will be seen, the arrangement is such that a downward movement of the chain 35, under control of the treadle or knee-operated member, will cause downward movement of the chain 59 so that the upperend of the latter will pull the screw 51 toward the mouth of the tube and swing the lever 43 in the manner indicated. The arrangement is preferably such that a slight amount of slack is provided in the chain 59 so as not to interfere with the action of the spring 50 in holding the puller member against the periphery of the cup l1.

Referring now to Figures 8, 9, and 10, a modified arrangement of the puller member is disclosed. The sewing machine may suitably be of the same construction as in the first embodiment. However, the puller member, in lieu of being supported directly from the frame of the machine, is supported indirectly from the framev through the aid of the bearing sleeve for the outer cup shaft. Thus, a plate may be secured to a laterally extending flange 65 at the lower end of a bearing sleeve 61 for the shaft of the outercup. The plate may be secured to the flange by means frame, a pair of feed cups adapted to engage and feed the work, means for supporting and driving said feed cups, means for yieldingly urging said cups together, said cups being separable to permit the introduction of work therebetween, a shiftable puller member urged yieldingly against the periphery of one of said feed c'ups, treadle operated means for separating said feed cups, and a flexible connection from said treadle operated means to said puller member for shifting the latter away from said one of said feed cups.

7. In a cup feed sewing machine having a frame, a pair of normally parallel shafts carried by said frame in inner and outer relation, a feed cup at the end of each shaft, spring means for normally urging the peripheries of said cups into engagement, one of said shafts being pivotally supported and arranged to have its axis tilted to carry its feed cup away from the other, a puller member cooperating with the cup of said one shaft, a spring-urged, pivotally mounted arm carrying said puller member, and treadle operated means for rocking said pivotally supported shaft and said arm to separate said cups and. to carry said puller member away from the associated cup.

8. In a cup feed sewing machine having a frame, a pair of normally parallel shafts carried by said frame in inner and outer relation, a feed cup at the end of each shaft, spring means for normally urging the peripheries of said cups into engagement, the outer of said shafts being pivotally supported and arranged to have its axi tilted to carry its feed cup away from the other, a puller member cooperating with the cup of the outer shaft, a spring urged arm pivotally mounted within said outer cup, said arm carrying said puller member, treadle operated means connected with said outer shaft for rocking the same to carry the associated cup away from the other cup, and means connecting said treadle operated means with said arm to shift said puller member away from the cup of said outer shaft.

9. In a cup feed sewing machine having a frame, a pair of normally parallel shafts carried by said frame in inner and outer relation, a feed cup at the end of each shaft, spring means for normally urging the peripheries of said cups into engagement, the outer of said shafts being pivotally supported and arranged to have its axis tilted to carry its feed cup away from the other, a puller member cooperating with the cup of the outer shaft, a spring urged arm pivotally mounted within said outer cup, said arm carrying said puller member, treadle operated means connected with said outer shaft for rocking the same to carry the associated cup away from the other cup, and means connecting said treadle operated means with said arm to shift said puller member away from the cup of said outer shaft, said connecting means enabling independent movement of said puller member away from the cup of said outer shaft.

10. In a cup feed sewing machine having a frame, a pair of normally parallel shafts carried by said frame in inner and outer relation, a feed cup at the end of each shaft, spring means for normally urging the peripheries of said cups into engagement, one of said shafts being pivotally supported and arranged to have its axis tilted to carry its feed cup away from the other, a puller member cooperating with the cup of said one shaft, a thread severing blade carried by said puller member at a point adjacent the point of cooperation of said member with said cup, a spring-urged pivotally mounted arm carrying said puller member, and treadle operated means for rocking said pivotally supported shaft and.

said arm to separate said cups and to carry said puller member away from the associated cup.

11. In a cup feed sewing machine having a frame, a'pair of normally parallel shafts carried by said frame in inner and outer relation, a feed cup at the end of each shaft, spring means for normally urging the peripheries of said cups into engagement, one of said shafts being pivotally supported and arranged to have its axis tilted to carry its feed cup away from the other, a puller member cooperating with the cup of said one shaft, said pullermember having portions extending under and over the other of said cups, a spring-urged, pivotally mounted arm carrying said puller member, and treadle operated means for rocking said pivotally supported shaft and said arm to separate said cups and to carry said puller member away from the associated cup.

12. In a cup feed sewing machine having a,

main frame, a pair of feed cups adapted to engage and feed the work, means for supporting and driving said feed cups, means for yieldingly urging said cups together, said cups being separable to permit the introduction of work therebetween, a shiftable puller member urged yieldingly against the periphery of one of said feed cups, an arm pivotally carried by said frame for supporting said puller member, means including a flexible connecting member operable at will for moving said arm about its pivot to carry said puller member away from said one of said feed cups, and tubular means carried by said frame for retaining and guidin said flexible connecting member intermediate its ends.

13. In a cup feed sewing machine, a main frame having a vertical standard and a laterally extending overhanging arm, a pair of shafts suspended from said arm in inner and outer relation, cooperating feed cups secured to said shafts adjacent their lower ends, the outer of said shafts being shiftably supported to allow movement of the related feed cup away from the other of said cups, spring means normally urging said outer shaft in a direction to carry its cup against the other cup, means operable at will for shifting said outer shaft to separate said cups, a bracket secured to said standard and extending beneath the cup secured to the inner shaft, an arm pivotally mounted on said bracket, said arm extending to a point adjacent the cup on the outer shaft, a puller member carried by said arm and arranged to engage the periphery of said cup on the outer shaft, spring means for urging said member against said cup, and means responsive to the operation of said means operable at will for shifting said arm to carry said member away from said cup.

MARTIN L. COOK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,308,910 Bottger Jan. 19, 1943 2,334,599 Boyer Nov. 16, 1943 2,412,894 Le Vesconte et a1. Dec. 17, 1946

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