US2360284A - Sewing machine - Google Patents

Description

Oct. 10, 1944. s u 2,360,284

SEWING MACHINE Filed July 2, 1940 "B Sheets-Sheet 2 1M ill H6 2 5&5

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{Ewe g, BY WW A TTORNEYS.

Oct. 10, 1944. G. SAUER 2,360,234

SEWING MACHINE Filed July 2, 1940 6 Sheets-Sheet 3 Z/MJW Georye ,Sauer,

. ATTORNEYS.

Oct. 10, 1944. s uE 2,360,284

SEWING MACHINE Filed July 2, 1940 s Sheets-Sheet 5 I 40a m y 114a i 107a 105a 1151A 116a R {6a 5 l 3);, {J Zia jfld 121a -170 117a Ea L jflfia l x 4 22 a i ll I I: .f--.. 135d zaa 5 I F i1 42a WITNESSES: l N V EN TOR:

ATTORNEYS.

Oct, 10, 1944,

G. SAUER 2,360 284 SEWING MACHINE Filed July 2, 1940 6 Sheets-Sheet 6 A TTORNE YS.

Patented- Oct. 10, 1944 SEWING MACHINE George Sauer, Berwyn, Ill., assignor to Union Special Machine Company, Chicago, 111., a corporation of Illinois Application July 2, 1940, Serial No. 343,513

12 Claims.

This invention relates to sewing machines; and it has reference more particularly to flat bed chain stitch sewing machines useful for example, in closing the mouths of successively fed filled bags either by stitching alone or by stitching with concurrent application of reinforcing elements along the line of the seam.

Machines of the kind referred to are ordinarily provided with feeding mechanisms whereof the rocker for directly imparting to and fro or feeding movements to the feed bar is disposed rearward of the point of stitch formation, and actuated by means inward of and along the feed bar from a longitudinally extending rotary or feed shaft below the work support. Such machines are moreover ordinarily provided with severing mechanism by which free connecting portions of the stitch chain or the stitch chain and the tape are out between the successive articles. In machines thus organized, it was necessary to place the chain cutting or the chain and tape cutting instrumentalities either to the rear of the feed bar remote from the region of stitch formation, or to crowd them into small, obstructed and inadequate intervening spaces where access to them for the purposes of inspection, adjustment or replacement was diflicult and tim consuming.

The chief aim of my invention is to overcome the above drawbacks, which objective I realize in practice as hereinafter more fully disclosed, by disposing the feed rocker forward of the point of stitch formation so that ample space is afforded immediately to the rear of the feed dog for placement of at least one of the cutting instrumentalities where the latter are more readily accessible; and by disposing the elements for actuating the feed rocker at the opposite end of the feed shaft where they too are more readily accessible for inspection and adjustment.

Another aim of my invention is to attain greater compactness in feeding mechanism having the above attributes which desideratum I also realize as hereinafter more fully disclosed by placing the feed bar in the plane of the needle 1' n a position where the looper may operate above it or to the needle side of itdepending upon whether the machine is used in horizontal posit on or in vertical position, drive end up as is usual in bag closingand providing it with an aperture for passage of the needle through it.

Another aim of my invention is to attain the foregoing advantages in a sewing machine Wherein the frame has a hollow base (as considered with the machine in horizontal position) which contains the feeding mechanism and parts of the severing mechanism; a hollow needle arm supporting standard which is oil tight and contains drive mechanism whereby the lower or feed shaft is connected to an upper or needle drive shaft, and an isolated chamber beyond the standard in which the elements connected to said lower or feed shaft for actuating the feed rocker are housed.

Other objects and attendant advantages will appear from the following detailed description of the attached drawings wherein Fig. l is a view in vertical longitudinal section of a sewing machine conveniently embodying my invention with the machine shown in horizontal position.

Fig. 2 shows the left hand end elevation of the machin with the front cover plate of the needle head removed to expose the parts at the interior.

Fig. 3 is a horizontal section of'the machine taken as indicated by the angled arrows III-III in Fig. 1.

Fig. 4 is a fragmentary view partly in elevation and partly in section taken as indicated by the angled arrows IV-IV in Fig. 3.

Fig. 5 is a view corresponding to Fig. 4 showing, in open position, the severing means by which the thread chains between successive bags are cut.

Fig. 6 is a diagrammatic view in plan further showing the action of the stitch chain severing means.

Figs. 7 and 8 are detail views looking as indicated respectively by the angled arrows VIIVII and VIII-VIII in Fig. 3.

Figs. 9, 10 and 11 are views corresponding to Figs, 1-3 showing another embodiment of my invention.

Fig. 12 is a fragmentary view in plan looking down upon the machine bed as indicated by the angled arrows XII-XiIin Fig. 9; and

Fig. 13 is a cross sectional view of the machine through the machine base taken as indicated by the arrows XIII-EH11 in Figs. 9, 11 and 12.

In the description which follows and in the claims, the relation of the parts is defined with respect to the horizontal position of the machine, which position has been chosen merely for convenience of illustration, although, as has been pointed out hereinbefore, the machine may be used in vertical position with its drive end uppermost.

The machine illustrated in Figs. 1-8, to which particular reference will be had for the time being, is designed for closing the mouths of bags solely by means of a stitch chain, and to sever the connecting portions of the chain between successive bags. As shown, the frame of the machine is formed as an integral structure with a hollow bed or base l5 whereof the-top and bottom. rear and front walls are respectively designated by the numerals l6, l1, l8 and I9, said base being open at the left hand end, see Figs. 1, 2 and 3. Rising from the base l5 at the right hand end, is a hollow standard from which extends horizontally at the top, a hollow arm 2| with a hollow head 22 at its free end, said head having a removable end cover 23. From Fig. 1 it will be noted that in accordance with my invention, the outer wall 24 of the standard is continued downwardly as at 25 to form the right hand end wall of the base l5, and that the inner wall 26 of said standard is likewise extended downward as at 21 to form a partition crosswise of said base. Also as shown in Fi 1, the inner wall 28 of the standard 20 is continued upwardly to form a partition 28 crosswise of the hollow overhanging arm 2|, and that another crosswise partition 29 spaced from thepartition 28 isolates the 1101-.

low 38 of the head 22 from the central chamber 3| within said arm. Extending lengthwise through the overhanging arm 2| near the bottom thereof is a rotary shaft 32 which is journalled in bearing sleeves 33 and 35 set respectively into the partitions 28 and 29. The shaft 32 also has journal support in a bearing sleeve 36 set into a boss 31 formed on the outer wall 24 of the standard 20 and extends to the exterior for connection thereto of a combined hand and belt wheel 38 whereby the machine can be operated either manually or by power.

Confined to up and down movement in guide bushings 40 and 4| set into the top and bottom of the head 22 is a bar 42, which carries a needle 43 at its lower end and which is reciprocated endwise, through a pitman 45, from a balanced crank member 46 secured to the left hand end of the shaft 32 within the hollow of the head. From Fig. 2 it is to be especially noted that the bushing 40 is of such length that the upper end of the needle bar 42 is completely sheathed when elevated to the fullest extent. This provision serves as a safeguard against injury to the operator When the machine is used in vertical position.

Cooperative with the needle in stitch formation within the base, is a looper 41, see Figs. 2 and 3. As shown, the looper 41 is secured to the upstanding arm 48 of a looper carrier 49 which is mounted for oscillatory movement about a laterallyextending pin or stud 50 on a collar 5| secured to a horizontal rock shaft 52 at the left hand end. The rock shaft 52 is journalled in spaced bearings 53 and 55 upstanding from the bottom H of the base l5, and affixed to it in the interval between the bearings 53 and 55, is a laterally extending arm 56, which, through a strap rod 51, is connected with an eccentric 58 on a rotary shaft 59 extending horizontally through the base of the machine. By the means just described, the looper 41 is given its needle avoiding movements. Through a train of intermeshing spur gears 68, 6| and 62 within the standards 28, the shaft 59 is driven in unison and in the same direction as the upper shaft 32. As shown in Figs. 1 and 3, the lower rotary shaft 59 is journalled in set bearings 65 and 66 respectively in the partitions 25 and 21 and also has journal support in bearing bosses 61 and 68 upstanding from the bottom I1 of the base. Loop taking movements are imparted to the looper 41 through means which includes a horizontal link 69 connected at one end to the upstanding arm 48 of the looper carrier 49 and at the other end to an upstanding arm 10 whereof the fulcrum hub is rotatively free on a crosswise shaft 1| which is fixedly held at its opposite ends in spaced lugs 12 and 13 upstanding from the bottom l1 of the base I5. Affixed to the rock shaft 1| intermediate the bosses 12 and 13 is a horizontal crank arm 15, which, through a short vertical pitman 16, is connected to a crank 11 on the rotary shaft 59.

The improved feeding mechanism of the machine includes afeed dog 18 whereof the toothed portions operate through slots in a removable throat plate 19 set into the top wall [6 of the base. As shown in Fig. 2, the feed dog 18 has its shank secured with capacity for vertical adjustment to the horizontal portion of a carrier bar 8| by means of a screw- 82. In accordance with my invention, the feed bar 8| is fashioned to angular configuration with its horizontal portion in the plane of the needle 43 in the line of feeding, which is apertured as at 83 for passage of the needle 43 through it, and a vertical portion which extends downwardly of the rear end of said horizontal portion. At its bottom end, the pendant portion 84 of the feed bar 8| is pivotally connected to the lower end of a link 85 whereof the upper end is engaged with a crank 86 at the left hand or distal end of the' lower rotary or feed shaft 59. Through this means, up and down or lift movements are imparted to the feed dog 18. It is to be particularly noted from Fig. 2 that the toothed portion of the feed dog 18 extends rearwardly of the direction of feeding and overreaches considerable of the horizontal portion of the feed bar 8|, and that the looper 41 operates above the feed bar in the interval between the latter and the overreaching portion of the feed dog. At its front end, the horizontal portion of the feed bar 8| is pivotally connected to an upstanding arm 81 on the distal end of a tubular rock shaft 88 which extends lengthwise through the base |5 in parallel relation to the rotary shaft 59 forwardly of the latter as considered with regard to the direction of feeding. At its left hand end the rock shaft 88 is journalled in bearing lugs 89 and 90 projecting inwardly from the front wall l9 of the base, and at its right hand end in bearings 9| and 92 set into the partitions 25 and 21. Due to the construction and arrangement of the feeding mechanism insofar as it has been disclosed, a clear space is left to the rear of the vertical portion of the feed bar 8| for the accommodation of a stitch chain severing mechanism which will presently be described. As shown in Figs. 1 and 3, the right hand ends of the shafts 59 and 88 extend beyond the bearings 65 and 9| into a lateral recess 93 formed in the outer wall 25 of the standard 20, said recess being closed by a removable cover plate 94. Secured to the rock shaft 88 within the recess 93 is a rearwardly extending horizontal arm 95, which, through a..Short vertical pitman 96 is connected to an adjustable crank pin 91 on the right hand end of the rotary shaft 59. The parts just referred to constitute the means whereby horizontal to and fro or feed movements are induced in the feed dog 18, said parts being readily accessible upon removal of the cover 94, for the purposes of regulation to vary the feed stroke of said dog.

Incident to performing its feed strokes, thefeed dog 18 is opposed by a presser foot I98 whereof the front end is inclined upwardly and curved as at |0| to facilitate entry of the leading edges of the bag mouths beneath it. As

shown, the presser foot I is pivotally connected at I02 to a shank member I'03 at the lower end of the vertical presser bar I05 extending upwardly through a guide bushing I00 at the bottom of the needle head 22 into the interior of said head. The presser bar I05 is subject to the action of a leaf spring I01 enclosed within the overhanging arm 2|. is apertured at its right hand end to engage the reduced top end of a pylon I08 upstanding from a transverse web I09 within the arm 2I intermediate the partitions 28 and 23, and its outer end is bifurcated to fit over a stirrup-like member II0 resting over the top of the presser bar I05. The pressure of the spring I01 is regulatable by means of a screw III which is' threaded into a boss H2 at the bottom of the overhanging arm 2I. The presser foot I00 is controllable by means including a rock shaft '3 which ex-,;;=

tends lengthwise of the overhanging arm 2I and which is journalled in the partitions 28 and 28. Ailixed to the end of the rock shaft II3 within the needle head 22 is a horizontal finger II5 which underreaches a collar II5 secured to the presser bar I05 near the upper end. Extending outward through a slot I I1 in the rear side wall of the overhanging arm 2I is a lever II8, which, at its inner end, is clamped to the rock shaft II3 within the chamber 3| by means of a screw H9. A torsion spring shown at I in Fig. 2 with one end thereof engaging the finger II5 from above tends to keep the lever II8 normally in the horizontal position shown with 'its upper edge bearing against the corresponding edge of the slot II1. Thus, as the lever H8 is depressed, the finger II5 will engage the collar H5 and thereby cause the presser foot I00 to be elevated for convenience of initially inserting the work therebeneath. By means of a link rod Hi, the lever I'IB may be connected either to an actuating knee press or foot treadle (neither illustrated) as desired. From Fig. 1, it will be noted that the hub I22 of the lever H8 is extended axially and has a wing I23, which, when said lever is operated, tends to push the stem I24 of a spring thread tensioning device I25 for the needle thread within the chamber 3| of the overhanging arm 2|, thereby to relieve said thread concurrently with the lifting of the presser foot.

The parts within the overheating arm 21 are rendered accessible upon retraction of the cover I26 at the top of the chamber 3|.

As previously stated, the machine is designed for stitching articles such as filled bags B whereof the open mouths are advanced in succession across the work support I6. as shown in Fig. 6, by the feed dog 18, and chain-stitched by the needle 43 and its cooperating looper 41. For the purpose of severing the portions of the stitch chain 0 between succeeding bags B (Fig. 6) I have provided an improved shearing mechanism, which, see Figs. 3-6, comprises a pair of blades I21, I 28 arranged crosswise of the direction of feeding immediately to the rear of the vertical pendant portion of the feed bar 8I. The blade I21 is adjustably secured to the rear wall I8 of the machine base, at the left hand thereof by a screw I29; While the blade I28 is similarly secured by means of a screw I30 within the slotted top of the vertical arm I3I of an angular lever I32. The horizontal arm I33 of the lever I32 is fast on a rock shaft I34 whereof the ends are journalled respectively in the end wall I8 and a bearing lug I35 upstanding from the bottom I1 of the base I5 within the hollow of the lat- As shown, the spring I01 I34 bears against the hub of the lever I32, see' Fig. 2, to yieldingly maintain the moving blade I28 at all times in shearing relation with the fixed blade I21. As shown in Fig. 5, the blade I28 has an extension I31 beyond its cutting edge I38, and against which the cutting edge 1'39 of the blade I21 bears for maintenance in alignment with the cutting edge I39 of the stationary blade. Directly over the region of meeting of the cutting blades I21, I28, the work supporting plate 19 has a slot Win the line of feeding into which the connecting thread chain C, between successive bags, is drawn incident to manipulation of the bags in the machine, and is interrupted by the extension I31 of the moving blade I28 and between the cutting edge of the latter and that of the fixed blade I21, so that the chain is severed upon the next actuation of the cutting mechanism. In the region of the cutting mechanism, the top of the rear wall I8 of the base I5 is thickened somewhat as at I4I (Figs. 2 and 3) and is provided with a slot I42 which registers with the slot I40 in the work support and which is sloped as at I42a (Fig. 2) to act after the manner of a chute to discharge the cut portions of the thread chain 'C from the machine. As shown in Figs. 3 and 6, the slots I40 and I42 are both rounded to facilitate entry of the thread chain. The movable knife blade I28 is actuated from an eccentric I43 on the rotary shaft within the hollow of the base I5 in the interval between the looper rocker eccentric 58 and the bearing lug 61, through a pendant strap link I44 whereof the lower end is connected to a ball stud I45 at the corner or angle of the lever I'32 which carries .said movable blade.

By reason of the compact arrangement of the mote disposal of the feed movement inducing elements at the driving end of the machine, ample space is afforded at the left hand end of the machine base at the rear for accommodation of the cutting elements of the chain severing mechanism. Moreover, since the left hand end of the base is open, as shown in Figs. 1-3, both the feed dog and the cutting elements are readily accessible for inspection, adjustment or replacement. In practice a removable cover (not shown) is preferably provided for the open left hand end of the machine base.

' The aforedescribed construction of the machine frame and feeding mechanism lends also itself to the incorporation of trimming mechanism and tape applying and severing mechanism of the kind featured in a copending patent application Serial No. 251,298 filed by me on January 17, 1939. In Figs. 9-13, I have shown a sewing machine so organized, which, except as hereinafter particularly pointed out, is like that shown in Figs. 1-8, and accordingly in order to obviate repetitive description, the corresponding parts in the latter illustrations are identified with the same reference numerals previously employed, except for the addition in each instance of the letter a for convenience of more ready distinction.

As shown in Fig. 10, the presser foot IOIla is longitudinally slotted at the bottom as at I50 to serve as a guide for a reinforcing strip or tape T which is to be applied crosswise of the mouths of the bags at one side, the tape being first led through a vertical supplemental guide I5I supportedat the front side of the needle head 22a enroute from a source of supply, not

illustrated. A second reinforcing strip or tape T for application to the opposite sides of the bag mouths is guided through a slot I52 formed in the throat plate 19a, as shogvn in Figs. 10 and 12, after having traversed another supplemental guide I53 secured to the base I50. of the machine at the front side I9a thereof. Afiixed to the feed bar 8Ia of which the horizontal portion is extended rearward as at I55 in the direction of feeding, is a supplemental feed dog I 56; and cooperating with this supplemental dog to assist in holding the bag material and the strips T, T to the work support during the stitching, is a supplemental presser foot I 51. As shown, .the supplemental presser foot I51 is pivotally connected to the outer end of a horizontal arm I58 (Fig. 12) fulcrumed on a stud I59 which projects laterally from the forwardly-reaching arm I60 of a fixed bracket I6I bolted to the top of the machine base Ia. A finger spring shown at I62 in Fig. 12 presses upon the arm I58 and thus serves to urge the supplemental presser foot I51 toward the machine base over the region of the supplemental feed dog I56. By the mechanisms thus far described, the two reinforcing tapes T, T are concurrently applied crosswise of opposite faces of the collapsed mouths of the bags successively advanced beneath the presser feet I00a, I51 by the action of the feed dogs 18a, I56, and said bag mouths closed by a line of chain stitches formed centrally of the tapes T, T.

The machine also involves means for trimming off the excess material at the bag mouths, which means includes a vertically reciprocating cutting blade I63 with an inclined saw edge opposed to the direction of feeding, said blade passing down through a clearance slot (not shown) in the pressed foot I00a to one side of the plane of the presser bar I05a and also through a'registe'ring slot I65 in the throat plate 19a, see Fig. 12, to shear against one side of the latter slot. The trimming is thus effected along a line which coincides with the outer edges of the two reinforcing strips T, T. As shown in Figs. 9 and 10, the movable knife blade I63 is secured to a head I66 at the lower end of a vertical slide rod I61 which is confined to up and down movement in a guide bracket I68 at the bottom of the needle head 22a. The slide rod I61 is actuated,

through a pitman I69, from an eccentric I10 affixed to the needle actuating shaft 32a of the machine immediately adjacent the counterbalanced crank member 46a, said pitman extending through 'a'clearance opening I1I in the sloping bottom portion of'the needle head. I

The incorporated mechanism for severing the stitch chain and the strips T, T' beyond opposite side edges of the bags, includes a stationary blade I12 whereof the cutting edge extends crosswise of the interval between the main and auxiliary feed dogs 18a, I56and the corresponding main and supplemental presser feet I00a, I51, and is exposed within a transverse slot I13 in the throat plate 19a. As shown in F185. 10,11 and 12, the stationary blade I12 has a laterally tumed pendant attaching or shank portion I15, which, by

means of a cap screw I16, is secured to a bracket I11 reaching inwardly from the rear side wall of the machine base I5a. With the stationary blade I12 cooperates a movable blade I18 at'the outer end of an arm I19 fulcrumed on a shaft I which is fixedly supported at opposite ends i paced bosses I8I, I82 of the bracket I6I hereinbefore referred to, see Fig. 12. The movable blade I18 is normally held in elevated retracted position by the action of a coiled tension spring shown at I88 in Fig. 12 which tends to draw the arm upwardly. Free on the shaft I80 within a bifurcation at the fulcrum end oi. the knife arm I19, is a rocker I85 which is constantly oscillated as a consequence of the connection of an arm I86 thereon by a link I81 with an eccentric I88 on the shaft 59a, said link passingdownwardly through a clearance opening in the top I6a of the machine base I5a. Arranged to coact with the rocker I85 is a coupling member in the form of a latch dog I90 which straddles the knife arm I19, said dog having pendant cars which extend downward of opposite sides of said arm and freely engage the opposite ends of a pivot pin I 9I passing through the arm, see Figs. 9 and 12. A compression. spring I92 exerts upward pressure upon the latch dog I90 to hold the latter elevated with its pawl end I 93 normally retracted out of the path of a notched projection I95 on the constantly oscillating rocker I85. Opposing the action of the spring I92 is a lighter spring I96 in compression between a tail projection I91 of the latch dog I90 and a corresponding projection I98 on a trigger element I99, which is freely fulcrumed on the pin I9I, at one side of the knife arm I19 in contiguous relation with the corresponding ear of the latch dog I90. As shown in Fig. 9, the trigger element I99 has a horizontal projection 200 opposite the projection I98 which abuts a vertical stop screw 20I adjustable in the dog I90. The trigger element I99 also has a depending feeler finger 202, which,

. by the action of the spring I96 upon said elei the rear end of ,a detector arm 209, the latter being fulcrumed on the stud I59 on the arm I80 of the bracket I6I, in the interval between the arm I58 of the auxiliary presser foot I51 andsaid bracket arm. Adjustably secured to the free end of the detector arm 209 is a detector 2I0 which has the form of a shoe and which is undertraveled by the collapsed mouths of the bags successively passed through the machine. The bottom edge of the detector 2I0 is yieldingly depressed normally into a slot 2 in the throat plate 19a by a coiled finger spring 2I2 which underreaches the detector arm 209 rearwardly of its fulcrum.

The operation of the severin mechanism embodied in the machine of Figs. 9-13 is fully described in the copending application to which reference is made hereinbefore, and it is therefore deemed unnecessary to repeat it here, since, per se, it does not constitute any part of the present invention. In the present connection, however, it is important to observe that by reason of the novel construction and arrangement of the feed mechanism, ample room is afforded in the left hand end of the machine base for the A accommodation of the lower knife I15 of the tape cutting mechanism as well as for the bracket I 11 by which said knife is supported, and that the securing screw I16 is readily accessible when removal of said knife becomes necessary for resharpening or replacement.

Attention is also directed to the fact that in both the machines which have been exemplified, the construction and arrangement'of the feeding mechanism actually makes it possible to reduce the width of the machine base (see Figs. 3 and 11) at the left hand end notwithstanding the provision of more ample room for the accommodation of the cutting element of the chain and tape severing mechanisms rearward of the feed dog in the line of feeding. Another feature of great practical importance is that the machine frame lends itself to either of the two exemplified forms of severing mechanisms without entailing any changes either in the feeding mechanism, the needle actuating mechanism, or the presser foot and tension control. While either machine may be used in the horizontal position in which position it is herein shown for convenience of illustration; it is more often suspended in vertical position from its standard end (e. g. right hand end in Fig. 1) when employed for closing the mouths of filled bags.

Having thus described my invention, I claim:

1. In a sewing machine, a work support; a

reciprocating needle movable through the work support; a. feed bar of right angle configuration in the plane of the needle with a portion aligned in the 'direction of feeding and extending forwardly of the needle, and a perpendicular terminal portion immediately rearward of the needle in the direction of feeding; a rocker-connected to the front end of the feed bar for imparting longitudinal feed movements to the bar; means con-. nected to the perpendicular portion of the bar for imparting lift movements to the bar; and means cooperative with the needle in stitch formation including a looper which moves in an orbit at the needle or work support side of the feed bar,

and a carrier arm for the looper movable laterally of the feed bar at the side thereof remote from the work support,

2. In a sewing machine, a work support; a reciprocating needle movable through the work support; a feed bar in the plane of the needle with a portion aligned in the direction of feeding and extending forwardly of the needle, and a perpendicular terminal portion at its rear end immediately rearward of the needle in the direction of feeding; a rotary shaft at right angles to the feed bar with its axis substantially in the plane of the perpendicular portion of the bar; a rock shaft forward of and parallel to the rotary shaft and oscillated therefrom; a rocker on the rock shaft connected to the front end of the feed bar to impart longitudinal feeding movements to the bar; a rotary actuator on the rotary shaft; a link connecting the rotary actuator with the perpendicular portion of the feed bar to impart lift movements to said bar; and means cooperative with the needle in stitch formation including a looper which moves in an orbit at the needle or work support side of the feed bar, and a carrier arm for the looper movable laterally of the feed bar at the side thereof remote from the work support.

3. In a sewing machine, a Work support; a reciprocating needle operated from one side of the work support; a rotary shaft extending lengthwise of the other side of the work support; means adjacent one end of the shaft for driving it; a feed bar aligned in the direction of feeding in the plane of the needle and extending forwardly of the needle; a rock shaft parallel to the rotary shaft at the same side of the work support; an actuating connection between the drive end of the rotary shaft and the corresponding end of the rock shaft for oscillating the latter; a rocker at the opposite end of the rock shaft connected to the feed bar to communicate longitudinal feed movements thereto; and means cooperative with the needle in stitch formation including a looper which moves in an orbit at the needle or work support side of the feed bar, and a carrier arm for the looper movable laterally of the feed bar at the side thereof remote from the work support.

4. In a sewing machine, a frame with a hollow base affording a work support, and a standard extending perpendicularly therefrom at one end and supporting a parallel needle arm; a needle guided for reciprocation at the front end of said arm; a needle-actuating shaft extending lengthwise of the needle arm; a shaft extending lengthwise of the base rearwardly of the needle with respect to the direction of feeding; gearing within the standard connecting the two shafts at one end; a rock shaft within the base parallel to and substantially coextensive with the second shaft; connections by which the rock shaft is oscillated from the drive end of the said second shaft; a feed dog; a supporting bar therefor aligned in the direction of feeding in the plane of the needle and extending forwardly of the needle; arocker at the opposite end of the rock shaft connected to the front end of the feed bar forwardly of the needle for imparting longitudinal feed movements to the feed dog; and means cooperative with the needle in stitch formation including a looper which moves in an orbit at the needle or work support side of the feed bar, and a carrier arm for the looper movable laterally of the feed bar at the side thereof remote from the work support.

5. In a sewing machine, a frame with a hollow base, a hollow standard extending perpendicularly therefrom at one end and supporting a parallel needle arm, partitions crosswise of the base in continuation of the opposite walls of the standard, and an isolated chamber beyond the outer partition; a reciprocating needle at the free end of the arm; a needle-actuating shaft extending lengthwise of the needle arm; a horizontal shaft extending lengthwise within the base, the latter shaft extending through the partitions with its rear end terminating in the chamber aforesaid; gearing within the standard connecting the two shafts; a rock shaft within the base parallel to and substantially co-extensive with the lower shaft, said rock shaft being forward of the needle with respect to the direction of feeding; connections within the chamber aforesaid by which the rock shaft is oscillated from the lower shaft; a rocker on the rock shaft at its distal end; a feed dog; a feed dog carrier bar in the plane of the needle connected to the rocker for imparting longitudinal feed movements to the feed dog, said bar being aligned in the direction of feedmg; a looper to cooperate with the needle and movable transversely of one side of the feed bar; and a carrier for the looper movable transversely of the opposite side of the feed bar.

A Sewing machine according to claim 5, in Winch the isolated chamber is provided with a ifitractailalehcover so that access may be had to e roc s aft oscillatin me d c amber. g ans housed withln 7. In a sewing machine for chain-stitching articles successively passed through it, a reciproeating needle; a feed bar extending forwardly of the needle with regard to the direction of feeding n lying in the plane of the needle, and

' plane parallel to and immediately rearward of the perpendicular terminal portion of the feed bar.

8. In a sewing machine, a reciprocating needle; a feed bar having a portion aligned in the direc tion of feeding and extending forwardly of the needle and with provision for clearance of the needle, and a perpendicular portion at its rear end; a rotary shaft at right angles to the feed bar with its axis substantially in the plane of the perpendicular portion of the bar; a rock shaft extending parallel to the rotary shaft and oscillated therefrom; a rocker on the rock shaft connected to the front end of the feed bar to impart longitudinal feed movements to said bar; a rotary actuator on the rotary shaft; a link connecting the rotary actuator with the end of the perpendicular portion of the feed bar to impart lift movements to the latter; a looper to cooperate with the needle in stitch formation; means for supplying continuous reinforcing tape for attachment to articles by the stitching; and mechanism for severing the connecting chain and the tape between the successive articles including cutting means operative in a plane parallel to and immediately rearward of the perpendicular portion of the feed bar.

9. In a sewing machine for chain-stitching articles successively passed through it, a frame with a hollow base having a hollow standard extending perpendicular thereto at one end and supporting a needle arm in parallel relation to the base; a needle-actuating shaft extending lengthwise of the needle arm; a rotary shaft extending lengthwise within the base; gearing within the standard connecting the two shafts; a rock shaft within the base parallel to and substantially coextensive with the rotary shaft; housed connecfor imparting longitudinal feed movements to the feed dog; severing mechanism including cutting means within the base rearward of the feed bar;

and a rearwardly open slot in the base at the rear thereof through which the portions of the stitch chain connecting successive articles drop into the province of the cutting means.

10. In a sewing machine for chain-stitching articles successively passed through it, a frame with a hollow base; a rotary shaft extending lengthwise through the base; means at one end of the shaft for driving it; a reciprocating needle movable into the base; a feed bar having a portion aligned in the direction of feeding and extending forwardly of the needle with provision for clearance of said needle, and having a perpendicular portion at its rear end; a rocker connected to the front end of the feed bar whereby longitudinal feed movements are imparted to said bar; a rotary actuator on the distal end of the shaft; a link connecting the rotary actuator to the end of the perpendicular portion of the feed bar and extending substantially parallel to said portion for imparting lift movements to the feed bar; a looper to cooperate with the needle in stitch formation; and mechanism for severing connecting portions of the stitch chain between the succcessive articles including a cutting element and a support therefor located in the base in an interval between the rear wall of the latter and the perpendicular end portion of the feed bar.

11. In a sewing machine, a reciprocating needle; a feed bar extending forwardly of the needle in the line of feed to actuating means therefor; a feed dog in the form of a cantilever carried by and overhanging the bar at the stitch point of the machine, with provision of a clearance interval between said dog and said bar; and a looper movable through said interval to cooperate with the needle in stitch formation.

12. In a sewing machine, a reciprocating needle; a feed bar extending forwardly of the needle sides thereof; and a looper movable through said interval to cooperate with the needle in stitch formation.

GEORGE SAUER.

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