US2277970A - Sewing machine - Google Patents

Description

March 31, 1942; HACKLANDER 2,277,910

SEWING MACHINE Filed Sept. 22,1959 5 Sheets-Sheet 1 March 31,1942. H, HACKLANDER 2,277,970

' SEWING MACHINE Filed Sept. 22, 1939 5 Sheets-Sheet 2 March 31, 1942. I HACKLANDER I 2,277,970

SEWING MACHINE Filed Sept. 22, 1939 v 5 Sheets-Sheet 3 r I!!! i v x, I V

LQZGW 2 3541/ March 31, 1942. H. HACKLANDER SEWING MACHINE Filed Sept. 22, 1959 5 SheetsSheet 4 m In 5 4 Hill"- gnaw Wow acZan/der wwwem 105 106 103 J ans March 31,1942. H, HACKLANDER' 2,277,970

SEWING, MACHINE Filed Sept. 22} 1939 5 Sheets-Sheet 5 Patented Mar. 31, 1942 UNITED STATES-PATENT. OFFICE SEWING MACHINE Hans Hacklander, Linden, N. J., assignor to The Singer Manufacturing Company,

Elizabeth,

N. J a corporation of New Jersey Application September 22, 1939, Serial No. 296,031

29 Claims.

which the looper is given a short throw or movement in proper timed relation with the needle.

Another object of the invention is to provide an improved stitch-finger about which the overedge stitches are formed and set, which stitchfinger is shaped so as to aid in setting a uniformly tight stitch with a minimum distortion of the fabric.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

In the accompanying drawings, Fig. 1 is a right side elevation of a sewing machine embodying the invention with a portion of. the frame-wall broken away to expose actuating mechanism within the frame.

Fig. 2 is an enlarged perspective view of the baffle-member for preventing the escape of oil from-within the machine-standard.

Fig. 3 is a horizontal sectional view taken through the machine-frame, illustrating the drive for the. looper and the spreader.

Fig. 4 is an enlarged top plan of the improved stitch-finger.

Fig. 5 is a front elevation of, the elements shown in Fig. 4.

Fig. 6 is a right side elevation of the elements shown in Fig. 4.

Fig. '7 is a front elevation of the upper por- 'tion of the machinewith the outer feed-cup removed to show the arrangement of the supporting rock-shafts for the looper and the spreader.

Fig. 8 is a view similar to Fig. '7, but illustrat- Fig. 9 is a front elevation of the upper por tion of the machine-frame, showing, the uncurl ing device in its operative position (full lines) and in its inoperative position (dotted lines). Fig. 10 is a disassembled perspective view showing the various elements of the uncurling guide latching device and the means for releasing the same.

Fig. 11 is a front elevation of.the uncurling guide latching device with the control-arms partially broken away to show the relative positions of the latches when the guide is in operative position,

Fig. 12 is a view similar to Fig. 11, showing I the relative positions of the latches when the guide is in inoperative position.

Fig. 13 is an enlarged fragmentary perspective view of the stitch-finger, needle and looper, illustrating the way in which the needle-threadloop positioning fin controls the needle-threadloop so that it may be entered by the point of the looper.

Fig. 14 is an enlarged fragmentary perspective view of the stitch-finger and stitch-forming devices, showing how the spreader lays one limb of the looper-threadloop over the crest of the looper-thread-loop position shoulder of the stitch-finger.

Fig. 15 is a top plan view of the elements as shown in Fig. 14.

Fig. 16 is an enlarged fragmentary perspective view similar to Fig. 14, but showing the spreader at the end of its loop-distendin'g stroke and. one limb of the looper-thread-loop in the trough at the base of the looper-thread-loop positioning shoulder of the stitch-finger.

Fig. 1'7 is a top plan view of the elements as shown in Fig. 16. I

Referring in detail to the drawings, the machine in which one embodiment of the invention is incorporated is constructed in'accordan'ce with the disclosure in my above mentioned pending application, and differs therefrom only in such particulars as hereinafter described. The machine illustrated includes a machine-frame I- having a standard 2 and a laterally projecting feed- cups 4 and 5 support and feed th'e fabric ing the machine fitted with a threaded looper instead of a non-threader spreader, adapting the machine to produce a three-thread seam.

sections past the stitch forming devicesata uniform rate. The standard 2 of the machine-frame is formed adjacent its top with a horizontal partition 6 which divides the machine-frame into a splash-lubrication compartment 1 and -a beltcompartment (not shown) in the overhanging bracket. As clearly illustrated in my pending application previously referred to. the splash-lubrication compartment 1 is closed at the bottom by means of a removable plate .(not shown).

Disposed in the splash-lubrication compartment 1 transversely of the machine-frame is a main-shaft 8 journaled at its opposite ends in bushings 9 and N), Fig. 3, each of which is fixedly secured in a boss provided in the standard wall preferably by screws l2 extending through a flange l3 formed on the outer end of each of the bushings. Mounted on the opposite ends of the main-shaft 8 are the usual balance-wheels |4,

each having preferably a V-shaped belt-groove,

I5. The shaft-bearing in each bushing is lubricated by oil splashed throughout the compart ment 1 by the connections actuated by the mainshaft 8. To prevent leakage of oil, the mainshaft at its opposite ends is provided with spiral grooves l6 which during the operation of the.

From the above, it will be obvious that rotareduced hub-portion l8 are several circular oil- 7 collecting grooves I9. In the event that some oil should leak onto the hub of the balance-wheel l4 this'oil is collected in the grooves l9 and is thrown off by centrifugal force into the internal recess I1 and is returned into the splash-lubrication compartment 1 by a return port (not shown) formed in the lower portion of the bush- Bushing H), as shown in Fig. 3, is preferably formed with an extended inner end-portion 20 which provides a relatively long bearing for the main-shaft 8 rigidly supporting the same andpreventing it from whipping or vibrating excessively during the high speed operation of the machine.

Referring now to the stitch-forming devices, the needle 2| is fixed in a needle-clamp 22 secured upon a horizontally disposed reciprocatory hollow needle-bar 23 journaled at its outer end in a bushing 24fixed in the wall of the machineframe I and at its inner end in a bushing 25 secured by a screw 26 in an aperture 21 provided in an internal boss 28 formed on the machine-frame I. To facilitate assembly, the aperture 21 in the boss 28 opens into the outer surface of the machine-frame and is normally closed by a screw-plug 29. p

The needle-bar intermediate its end has clamped thereon preferably by means of a screw 3|), Fig. 3, a collar 3| provided with an upstanding guide-lug 32 adapted to slide in a guideway between gibs 33 secured to the bottom of the horizontal partition 6 by screws 34. The function of the guide-lug 32 is to provide means for preventing the needle-bar 23 from turning in its bearings as the same is reciprocated. Depending from the collar 3| is a lug 35 connected by a link 36 to the upper arm of a rock-lever 31 having an elongated hub 38, see Fig. 3, journaled between collars 39 upon a fulcrum rod 40 fixed in spaced lugs 4| formed upon the machineframe I. Connected to the lowerarm of the rock-lever 31 is a pitman 42 which is connected at its other end to a crank 43 formed in the main-shaf t 8.

tion of the niain shaft 8 imparts to the needlebar 23, through the connections just'described, an endwise reciprocatory motion in time with'the other stitch-forming devices now to be described.

Cooperating with the needle 2| is a looper 44. of the threaded type, which is constructed and actuated so that it seizes the thread-loop cast out by the needle 2| during the beginning of the needle-return or withdrawal stroke, thereby to enchain the needle-thread-loop with the thread Tp passing through the eye of the looper 44. The looper 44 is formed with a-ilattened shank 45 secured by a screw 45 in a recess provided in a looper-carrier 41 fastened by set-screws 48 upon the outer end of a comparatively short supporting shaft 49 journaled, in an angular relation to the needle-bar 23, in the lower portion of a bracket 50 depending from beneath the laterally projecting overhanging bracket 3 of the machine-frame I. Fastened upon the inner end of the looper supporting shaft 49 by set-screws 5| is a downwardly extending rock-arm 52, the lower end of which is connected through a balland-socket joint with one end of a link 53 con-- nected at its other end through a ball-and-socket joint to a lateral extension 54 secured by the screw 55 to ,the outer end of the needle-bar 23. To steady the link 53 and prevent the same from turning about its longitudinal axis, the link has fixed upon the top thereof a'forked member 55 which straddles a pin 51 extending upwardly from the ball on the free end of the lateral extension 54. a

The function of the looper 44, as indicated briefly above, is, firstly, to seize the thread-loop cast out by the needle 2|, thereby enchaining the same with the thread carried by the looper, and secondly, to position that portion of thread carried by the looper and adjacent the looper-eye so that the looper-threadcan be engaged by a spreader which presents the looper-thread-loop to the needle for entrance by the latter. In the machine disclosed these two steps are effectively carriedout by a simple oscillation of the looper 44 about the longitudinal axis of the supporting shaft 49. In the machine disclosed, an oscillatory movement of the looper 44 is the only motion required to effect concatenation of the needle-thre'ad-loop with the looper-thread and have the looper present a thread loop to the spreader. because of the angular arrangement of the looper supporting shaft 49 with respect to the longitudinal axis of the needle-bar 23. It will be understood that the looper point travels in a single plane which is preferably atan acute angle with a vertical plane passing through th longitudinal axis of the needle-bar.

As is general in sewing machines, the needle during the initial portion of its withdrawal stroke forms or casts out a. thread-loop which is subseinto loop-seizing position. In the present case,

"angle.

is at the extreme end of its work-penetrating stroke (see Fig. 3), the link 53 connecting the depending rock-arm 52 with the needle-bar extension 55 is disposed so that its longitudinal axis when extended forms with the longitudinal axis of the needle-bar 23 substantially a right When arranged in this way the initial portion of the withdrawal stroke of the needle acts to pivot the link 53 about the lower end of the depending rock-arm 52 without imparting to the link 53 any appreciable endwise motion.

"In the absence of any endwise motion of the link 53, the rock-arm 52 does not turn the 'looper supporting shaft 49 in its bearing and therefore the looper 44 remains in a state of dwell. As the needle-bar 23 continues in its withdrawal stroke, and the period of dwell of the looper is terminated, the looper is oscillated about the axis of the looper supporting shaft 49, the looper slowly accelerating in speed until it reaches a maximum. The slow acceleratlon of the looper during the period in which it seizes and enters the needle-thread-loop is of importance in that during the seizure of the thread-loop the latter is not subjected to any abrupt strain, with the result that thread-breakage is reduced to a min-' imum and the setting of the previously formed stitch may bemore readily accomplished.

As previously described the looper, after entering the thread-loop cast out by the needle, presents its own thread to a spreader which distends the looper-thread-loop for entrance by the needle prior to its penetration of the fabric.

cated at its free end, is formed with a flattened shank 59 removably fastened by a screw 60 upon the upper end of a short inclined support shaft 6| journaled for oscillation only in-spa'ced bearing lugs 82 and 63 formed integral with the machine-frame l. While not essential, it will be observed in Fig. 3 that the longitudinal axis of the spreader-supporting shaft 6| lies in a vertical plane which intersects the vertical plane containing the axis of the needle-bar 23 at substantially a right angle. Clamped upon the supthe present disclosure, the spreader 58, bifur-- like. Each of the resilient sections is provided with a relatively small clearance aperture it through which works the pitman 65. To facilitate assembly or renewal of the heme-member $8, the resilient sections are vertically split, as at E9, whereby the bafiie-member may be com veniently placed upon the pitman 85 for attachment to the horizontal partition 5.

From the foregoing, it will be understood that I have provided a stitch-forming mechanism for a 'so-called cup-feed sewing machine including a needle 2! and two thread-manipulating de-' vices 44 and 58, the needle being reciprocated endwise in a substantially horizontal plane and the ,two thread-manipulating devices being oscii lated each in asingle plane only for cooperation with the needle. Simple oscillatory movement of each of the two thread-manipulating devices is all that is required to effect stitch-formation because of the angular arrangements of the supporting shafts 48 and BI, as best shown in Figs.

3 and 7. a

In Fig. 8 the spreader has been replaced by a threaded secondary looper 80, thus converting the two-thread machine into a three-thread machine. When fitted to sew with three threads, the thread Tp on the primary looper 44, instead of being distended for entrance by the needle 2|, is seized by the secondary looper 80, thereby enchaining the thread Tp on the primary looper 44 with the thread Ts on the secondary looper 80. After so enchaining" the two threads, the secondary looper presents its thread Ts to the needle for entrance by the same prior to its penetration of the fabric sections. By the mere substitution of a threaded looper for a spreader the machine disclosed may be fitted to make a three-thread overseam instead of a two-thread overseam.

As is common in overseaming machines of the type disclosed there is provided a stitch-finger overlying the feed- cups 4 and 5 at the stitchingpoint and about which the stitches are formed and set to minimize distortion of the marginal edges of the fabric sections being sewn. The stitch-finger as disclosed comprises an attenuated substantially conical blade 8| terminating in an abruptly inclined looper-thread-positioning a clearance opening 61 in the forward wall of the splash-lubrication compartment I. It is required that the opening 61 be of a size substantially larger than the size of the pitman 65, since the latter in imparting oscillatory movements to the spreader-supporting shaft 6| has a lateral movement as well as an endwise movement. To prevent oil from being splashed out of the compartment 1 during the operation of the machine, the opening 61 at its inner end is substantially closed by. a baflle-member 68, shown in Fig. 2.

The baflie-membenwhich is adapted to be attached to the under surface of the horizontal partition 6 by a fastening-screw 69, Fig. 1, comprises a sheet-metal right-angle-plate I0 having in its horizontal limb an elongated slot H for the fastening screw 69 and having in its vertical limb a cut-out 12 forming two depending supporting plate-members I3 and I4. Secured, preferably by rivets l5 and washers 16, to the supporting plate-members l3 and I4 are two resilient sections TI composed of felt, rubber, or the shoulder 82 and a trough 84 at the junction of the blade 8 I and the shoulder 82, and a horizontally projecting needle-thread-loop positioning fin 85 having a curved thread-engaging edge 85'. The shank 86 of the stitch-finger is secured by two screws Blupon a support 88 disposed within the upturned peripheral flange of the inner feed-cup 4 and sustained by two screws 89 to an angle-bracket fastened to the standard-wall. The support 88 beneath the blade 8| of the stitch-finger is formed with a needleclearance slot 9l through which the needle 2| of the needle-return or withdrawal stroke casts out a' substantially vertical thread-loop Tn, as shown in Fig. 13. This thread-loop, if correctly positioned, is entered by the point of the threaded looper 44 which enchains its thread Tp with the thread Tn carried by the needle. It has been found that occasionally the needle-threadloop, instead of being formed vertically as shown in Fig. 13, is or less horizontal position to the right of the needle-blade. When the needle-thread-loop is in this abnormal position, the point of the looper 44 cannot enter said loop and a skipped stitch results. To eliminate this skipping of stitches, the stitch-finger has been formed with a horizontally projecting needle-thread-loop positioning fin 85 having a curved thread-engaging edge 85'. The purpose of this curved edge 85 is to provide a stationary abutment against which the upper limb of the needle-thread-loop Tn wlpes during the withdrawal stroke of the needle 2|. During the sewing operation, if the needlethread-loop tends to lay over into a more or less horizontal position, the contact of the upper limb of the needle-thread-loop with the curved thread-engaging edge 85' of the fin 85 will right the needle-thread-loop into its normal vertical position so that it may be easily entered by the point of the looper 44. The provision of the needle-thread-loop positioning fin 85 assists to a reat extent in minimizing the skipping of stitches during high speeds of operation of the machine.

In addition to the fin 85 for controlling the needle-thread-loop, the stitch-finger -is fitted with a shoulder 82 for assisting in positioning the looper-thread-loop for entrance by the needle. As shown in Figs. 14 and 15, when the needle 2| reaches substantially the end of its withdrawal stroke, the spreader 59 engages one limb of the looper-thread Tp and lays said limb over the crest 83 of the shoulder 82. As the spreader 58 continues downwardly in its loop-distending stroke it draws the limb of the. looper-thread Tp over the crest 83 and down the inclined shoulder 8: to the trough 84 at the base of the Sh0111- der 82, see Figs. 16 and 1'7. As shown in Fig. 4, the crest 83 is at one side of the path of needlereciprocation and the trough 84 is at the opposite side of the path of needle-reciprocation. This movement of the limb of the looper-threadloop down the shoulder and into the trough 84 results in an opening up of the looper-threadloop so that during the next work-penetrating stroke of the needle 2| it will unerringly enter the looper-thread-loop prior to its penetration of the fabric sections. It is essential that the trough 84 be spaced to one side of the line of needle-reciprocation a distance at least equal to the shortest stitch-length to which the machine can be adjusted for, as shown in Figs. 16 and 17, this forms a V-shaped thread-loop between the trough 94, spreader 58 and the eye in the looper 44. It will be understood that the wider the thread-loop is spread by the trough, the less likelihood exists that the point of the needle 2| will fail to enter the looper-thread-loop.

Figs. 9, 10, 11 and 12 disclose an uncurling guide with which the machine is fitted when seaming hosiery and the like. As shown in Fig. 9, the uncurling guide is located directly in front of the feed-cups and'functions-to uncurl and direct the edges of the fabric preparatory to stitching. The present uncurling guide forms the subject of my copending divisional application Serial No. 303,946, filed Nov-. 13, 1939, which matured into U. S. Patent No. 2,256,672 on Sept. 23, 1941, and is a modification of the uncurling guide disclosed cast out and twisted into a more 99 against the faces of the guiding plate. The.

mounting for the uncurling guide is identical with I that shown and described in my pending application above mentioned.

Referring to Fig. 10, it will be seen that the supporting head portion 94 of the central guiding plate 93 is formed with a bearing aperture 91 through which projects a cylindrical boss formed upon astationary locking disk 99. The locking disk is rigidly fastened face to face to the vertical plate I00 by a bolt IOI with the head 94 of the central guiding plate 93 interposed between the vertical plate I00 and the locking disk 99. To permit the central guiding plate 93 to turn freely upon the boss 98, the width of said boss is slightly in excess of the thickness of the central guiding plate.

To positively hold the uncurling guide in set positions, the locking disk 99 is formed with two notches I02 and I03. Cooperating with these notches are two pivotal latches I04 and I05 biased toward each other by a coil-spring I06 connected by shouldered screws I01 and I08 to the free ends of the latches. as at I09 and H0 to receive a fulcrum-stud III threaded into an ear II2 formed on the head 94 of the central guiding plate 93. Latch I04 has secured to it by screws I01 and H3 a controllever II4 having at its free end an offset fingerpiece II5. Latch I05 has similarly secured to it by screws I08 and IIS a control-lever II'I having at its free end an offset finger-piece H8. The two control-levers H4 and Ill cross each other, the control-lever I I1 being bent as at II9 to provide clearance for the control-lever I I4, whereby independent movement of one control-lever will not interfere with the other control-lever.

Referring now to Fig. 9, it will be understood that the uncurling guide is shown in full lines in its normal operative position. In such position the latch I04 is disposed in the notch I02 in the locking disk 99, see Fig. 11, while the latch I05 rides on the periphery of the locking disk, the latch I04 being held in the notch I02 by the coilspring I06. When it is desired to shift the uncurling guide out of operative position and into the position shown in dotted lines in Fig. 9, the control-lever H4 is moved in a counterclockwise direction and the initial movement of the controllever II4, which movement is independent of the central guiding plate 93, raises the latch I04 out of the notch I02. When the latch is entirely clear of'the notch, the control-lever I I4, the control-lever Ill, and the central guiding plate 93 move as a unit, turning the guide about the axis of the cylindrical-boss 98 on the locking disk 99 until the latch I05 registers with and enters the notch I03 in the locking disk. During this turning of the guide the latches I04 and I05 ride upon the periphery of the locking disk 99, the coil spring I05 being sufficiently strong so that pressure on the control-lever H4 in a counterclockwise direction will not tend to lift the latch I04 off the periphery of the locking disk 99, but will The two latches are apertured effect a substantially rigid connection between the control-lever l l4 and the guide.

When it is desired to return the uucurling guide to operative position, such as shown in full lines in Fig. 9, the control-lever H7 is turned in a clockwise direction, thereby first moving the latch 605 out of the notch ms and, secondly, turning the guide about the boss 98 until the latch HM registers with and enters the notch H12 in the locking disk 98. The two control-levers Ill and H! are designed for independent operation and when it is desired to movethe guide into inoperative position control-lever H4 is operated, and when it is desired to return the guide to operative position control-lever H1 is operated.

From the \above description, it will be appar cut that an uncurling guide has been provided having means including two latches, each having its own control-lever for positively locking the guide in or out of operative position. .In the embodiment chosen for illustration, the controllevers [l4 and III are each removably secured to its respective latch by means of screws. Obviously' the control-lever may be formed integral with the control-lever I I1 with a downward movement of the hand to shift the guide back into operative position.

Having thus set forth the nature of the inven-" tion, what I claim herein is:

1. A sewing machine having, in combination, a frame, a main-shaft journaled in said frame, feeding mechanism, stitch-forming devices ineluding a threaded needle and a complemental looper adapted to seize thread-loops presented by said needle, a needle-carrier operating through a wall of said frame, means within said frame for operatively connecting said needle-carrier to said main-shaft, and means externally ofsaid frame for connecting said looper to said needle-carrier for actuating said looper in timed relation with said needle.

v2. A sewing machine having, in combination, a frame, a main-shaft journaled in said frame, feeding mechanism, stitch-forming devices in-- cluding a threaded needle and a looper cooperating therewith, a, reciprocatory needle-bar carrying said needle, means operatively connecting said needle-bar to said main-shaft, a looper-shaft supporting said looper, and means comprising a link and arm connecting said looper-shaft directly to said needle-bar for actuating said looper in timed relation with said needle.

3. A sewing machine having, in combination, a frame, a main-shaft journaled in said frame, feeding mechanism, stitch-forming devices including a threaded needle and a looper cooperating therewith, a reciprocatory needle-bar journaled in said frame and carrying said needle, means within said frame for operatively connecting said needle-bar to said main-shaft, a

looper-shaft supporting said looper, andmeans externally of said frame for connecting said looper-shaft to said needlebar for actuating said looper in timed relation with said needle.

eluding a threaded needle and a looper cooperating therewith, a reciprocatory needle-bar journaled in said frame and carrying said needle, meanswithin said frame for operatively connecting said needle-bar to said main-shaft, a loopershaft supporting said looper and arranged so that its longitudinal axis cuts the vertical plane containing the longitudinal axis of .said needle-bar at an angle, and means externally of said frame for connecting said looper-shaft to said needlebar for. actuating said looper in timed relation with said needle.

5. A sewing machine having, in combination, a frame, a main-shaft journaled in said frame, feeding mechanism, stitch-forming devices including a threaded needle and a looper cooperating therewith, a reciprocatory needle-bar carrying said needle, means for operatively connecting said needle-bar to said main-shaft, a loopershaft supporting said looper, a rock-arm secured to said looper-shaft, and a link connecting said rock-arm to said needle-bar for oscillating said looper in timed relation with said needle.

6. A sewing machine having, in combination, a frame,'a main-shaft journaled in said frame, feeding mechanism, stitch-forming devices including a threaded needle and two cooperating oscillatable elements at least one of which is threaded, a carrier for said needle, means for actuating said needle-carrier, shafts supporting said two oscillatable elements,'means including "threaded, a carrier for said needle operating through a wall ofsaid frame, means for actuating said needle-carrier, shafts for supporting said two oscillatable elements, mean externally of said frame for connecting one of said elementsupporting shafts to said needle-carrier, and means including a connection penetrating said frame for connecting the other of said elementsupporting shafts to said main-shaft.

8. A sewing machine having, in combination, a frame, feed-cups exteriorly of and supported by said frame for sustaining and feeding fabric sections, stitch-forming devices including a threadedneedle and a cooperating looper, a reciprocatory needle-bar journaled horizontally in said frame, an actuating shaft mounted in said frame, means within said frame for connecting said needle-bar to said actuating shaft, a looper-carrier for supporting said looper, and means ex ternally of the frame for operatively connecting said looper-carrier to said needle-bar.

9. A sewing machine having, in combination, a frame including a standard and an overhanging bracket, a main-shaft journaled in'said frame, feed-cups exteriorly of and supported by the frame beneath said overhanging bracket for sustaining and feeding fabric sections, stitch-forming devices including a threaded needle and two cooperating oscillatable elements at least one of which carries a thread, a carrier for said needle, means within said frame for actuating said needle-carrier, shafts supporting said two oscillatable elements, means externally of said frame for connecting one of said element-supporting shafts to said needle-carrier, and mean including a connection penetrating said frame for connecting the other of said element-supporting shafts to said main-shaft.

10. A sewing machine having, in combination, a frame including a standard and an overhanging bracket, feed-cups exteriorly of and supported by said frame for sustaining and feed ng fabric sections, stitch-forming devices including a needle and a cooperating looper, a reciprocatory bar carrying said needle and journaled hor zontally in said frame, a looper-shaft for said looper sustained by said overhanging bracket, and means for operatively connecting said looper-shaft to said needle-bar. I

11. In a sewing machine, the combination with a frame including a standard and an overhanging bracket, and feed-cups. exteriorly of and supported by said frame for sustaining and feeding fabric sections, of stitch-forming devices including a needle and two cooperating oscillatable elements, 'a reciprocatory bar carrying said needle, a shaft supporting one of said oscillatable elements, a rock-arm secured to said shaft, a link operatively connecting said rock-arm to said reciprocatory needle-bar, a second shaft supporting the other of said oscillatable elements, a rock-arm secured to said second shaft, and means including a pitman for actuating the rock-arm secured to said second shaft.

12. In a sewing machine, the combination with a frame including a standard and an overhanging bracket, a main-shaft, and feed-cups exteriorly of and supported by said frame for sustaining and feeding fabric sections, of stitchforming devices including a needle, a looper and a spreader, a reciprocatory bar carrying said needle, an oscillatory shaft supporting said looper, means connecting said looper-oscillatory shaft to said needle-bar, a second oscillatory shaft supporting said spreader, and means for operatively connecting said spreader-oscillatory shaft to said main-shaft.

13. A sewing machine having, in combination, a frame, a main-shaft journaled in said frame, feeding mechanism for advancing fabric sections through the machine, stitch-forming devices including a threaded needle and a cooperating threaded looper for producing overseaming stitches, and a stitch-finger having means for correctly positioning the needle-thread-loop for entrance by the looper and means for properly spreading the looper-thread-loop for entrance by the needle on its succeeding work-penetrating stroke.

14. A sewing machine having, in combination. a. frame, a main-shaft journaled in said frame, feeding mechanism, stitch-forming devices including a threaded needle and'a cooperating threaded looper for producing overseaming stitches, and a stitch-finger having a needlethread-looppositioning fin and a looper-threadloop positioning shoulder.

15. A stitch-finger for use on an overseaming sewing machine, comprising a shank, a" blade about which the stitches are formed and set, a laterally extending fin for controlling and positioning the needle-thread-loop for entrance by the needle, and an inclined shoulder terminating at the base of said blade for spreading the looper-thread-loop for entrance by the needle on its succeeding work-penetrating stroke.

16. A sewing machine having, in combination, a frame provided with a depending bracket located outside of said frame, feed-cups exteriorly of said frame for sustaining and feeding fabric sections, stitch-forming devices including a needle and a pair of thread-handling implements complemental to said needle in the formation of stitches, a reciprocatory bar carrying said needle and journaled in said frame, a shaft carrying one of said thread-handling implements and disposed in said depending bracket so that its longitudinal axis is arranged at an acute said needle in the formation of stitches, a

' reciprocatory bar carrying said needle and journaled in said frame, a shaft carrying one of said thread-handling implements and disposed so that its longitudinal axis is arranged in a substantially horizontal plane and at an acute angle to the vertical plane containing the longitudinal axis of said needle-carrying bar, means for operatively connecting said shaft to said needlecarrying bar, an inclined shaft carrying the other of said thread-handling implements, and means for actuating said inclined shaft.

18. A sewing machine having, in combination, a frame including a standard and an overhanging bracket, feed-cups exteriorly of said frame and beneath said overhanging bracket for sustaining and feeding fabric sections, stitch-forming devices including a needle, looper and spreader, a reciprocatory bar carrying said needle, a shaft carrying said looper and disposed so the vertical plane containing its longitudinal axis intersects the vertical plane containing the longitudinal axis of the needle-carrying bar'at an angle, means for imparting operative movements to said shaft, an inclined shaft carrying said spreader and disposed so that the vertical plane containing its longitudinal axis intersects the vertical plane containing the longitudinal axis of the needle-carrying bar at substantially a right angle, and means for imparting operative movements to said spreader-carrying shaft.

19. The combination as called for in claim 18, in which the shaft carrying said looper is connected by mechanism to be operated directly by said reciprocatory needle-carrying bar.

20. An improved stitch-forming mechanism for cup-feed sewing machines having a frame including a standard and a main-shaft journaled in said standard, comprising, a needle and a pair of thread-handling implements complemental to said needle in the formation of stitches, a carrier for said needle operatively connected to said main-shaft within said standard, a carrier for one of said thread-handling implements disposed exteriorly of said standard and connected to be operated by the carrier for said needle, a carrier for the other of said thread-handling implements disposed also exteriorly of said standard, and

-means extending through a wall defining said standard and operatively connecting said last named carrier to said main-shaft for actuation thereby. I

21. An improved stitch-forming f'mechanlsm for cup-feed sewing machines havin g'a frame including a standard and a main-shaft journaled in said standard, comprising, a needle and a pair of thread-handling implements complemental to said needle in the formation of stitches, a needlebar journaled for endwise reciprocation in a wall defining said standard, means within said standard operatively connecting said needle-bar to said main-shaft, a shaft exteriorly of said standard and adapted to support one of said thread-handling implements, means connecting said shaft to said needle-bar for actuation thereby, a second shaft also exteriorly of said standard and adapted to support the other of said threadhandling implements, and means including a connection extending through the wall defining said standard for operatively connecting said second shaft to said main-shaft for actuation thereby.-

22. An improved stitch-forming mechanism for cup-feed sewing machines having a frame formed with a closed lubrication compartment and a main-shaft extending through said lubrication compartment, comprising, a needle and a pair of thread-handling implements complemental to said needle in the formation of stitches, a needle-bar reciprocably journaled in an oiltight bearingin a wall defining said lubrication compartment, means within said lubricationcompartment for operatively connecting said needle-bar to said main-shaft, a shaft exteriorly of said frame and adapted to support one of said thread-handling implements, means connecting said shaft to said needle-bar for actuation thereby, a second shaft also exteriorly of said frame and adapted to support the other of said thread-handling implements, means including a connection having endwise as well as later-- al movements extending through the wall defin-- to said needle including a looper having a pro-' nounced dwell in its operative movementse'atthe beginning of the retracting movement-"of said needle, a needle-bar operatively connected to said main-shaft, a looper-carrier, and operating connections between said needle-bar and loopercarrier for actuating said looper.

25. A stitch-forming mechanism for cup-feed sewing machines having a frame and a mainshaft journaled in said frame, comprising, a reciprocatory needle and mechanism complemental to said needle including'a looper having a retracted position relative to said needle, a needlebar journaled for endwise reciprocation in said frame and operatively connected to said mainnounceddwell in its operative movements at the shaft, a looper-carrier supporting said looper, and

means'including a link for operatively connect-, ing said looper-carrier to said needle-bar, thelongitudinal axis of said link forming substantially a right angle with the longitudinal axis of said needle-bar when the looper is in its retracted position.

2'6. A' stitch-forming mechanism for cup-feed sewing machines having a frame and a mainshaft journaled in said frame, comprising, a reciprocatory needle and mechanism complemental to said needle including'a' looper having a probeginning of the withdrawal stroke of said needle,

a needle-bar journaled in said frame and operatively connected to said main-shaft, a loopershaft supporting said looper, a rock-arm fixed to said looper-shaft, and a link connected at one end to said rock-arm and at its other end to said needle-bar.

27. A stitch-forming mechanism for cup-feed sewing machines having a frame and a mainsh-aft journaled in said frame, comprising, a threaded needle carried on the end of a reciprocatory needle-bar, a looper cooperating with said needle and having a pronounced dwell in its operative movements at the beginning of the withdrawal stroke of said needle, a looper-shaft supportingsaid looper and confined to movement of oscillation, means operatively connecting said looper-shaft to said needle-bar, a thread-handling implement complemental to said looper and needle, a shaft supporting said thread-handling l implement, and means for actuating said shaft. 28. A stitch-finger for use on an overseaming sewing machine having stitch-forming devices including a threaded reciprocatory needle and a complemental threaded looper, comprising, a shank, a blade about which the stitches are formed and set, and an inclined shoulder intermediate said shank and blade adapted for spreading the looper-thread-loop for entrance by the needle, said shoulder having a crest at one side of the'path of needle-reciprocation and a. trough at the other side of the path of needle-reciprocation.

29. A stitch-forming mechanism for cup-feed sewing machines having a frame provided with a bracket and a main-shaft journaled in said frame, comprising, a threaded needle and a pair of thread-handling implements complemental to said needle in the formation of stitches, a reciprocatory bar carrying said needle and journaled in said frame, a substantially horizontal shaft carrying one of said thread-handling implements and supported by said bracket exteriorly of said frame so that its longitudinal axis lies in a vertical plane relatively convergent with the vertical plane containing the axis of said needlecarrying bar, means for actuating said shaft in timed relation with said needle, a carrier for the other of said thread handling implements, and

, means for actuating said carrier.

HANS HACKLANDER.

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