US2636462A - Overedge sewing machine - Google Patents

Description

April 1953 A. c. PETERSON EI'AL 2,636,462

OVEREDGE SEWING MACHINE Filed Oct. 19, 1949 6 Sheets-Sheet 1 ,U? a M m w' 6 o 2 T 8 I Q J" INVENTORS.

BY ATTORNEY April 1953 A. c. PETERSON ETAL 2,636,462

OVEREDGE SEWING MACHINE 6 Sheets-Sheet 3 Filed Oct. 19, 1949 INVENTORS. ALBERT C. PETERSON NED L. WALLENBERG CLARENCE C SMITH ATTORNEY.

April 1953 A. c. PETERSON EI'AL 2,636,462

OVEREDGE SEWING MACHINE Filed Oct. 19, 1949 6 Sheets-Sheet 4 IN V EN TORS.

N 06 gm E8 3 PLC a; C

C m m E R BDA LEIL ANC wdE April 28, 1953 A. c. PETERSON EI'AL 2,636,462

OVEREDGE SEWING MACHINE Filed Oct. 19, 1949 6 Sheets-Sheet 5 5 w 3 LI. 3

INVENTORS.

ALBERT C. PETERSON NED L. WALLENBERG CLARENCE C. SMITH ATTORNEY.

April 28, 1953 A. c. PETERSON ETAL 2,636,462 OVEREDGE SEWING MACHINE Filed Oct. 19, 1949 6 Sheets-Sheet 6 I a H I llll I33 VENTORS.

ALBER PETERSON NE WALLENBERG CL NCE C. SMITH ATTORNEY.

Patented Apr. 28, 1953 2,636,462 OVEREDGE SEWING MACHINE Albert C. Peterson, Park Ridge, and Ned L. Wallenberg and Clarence C. assignors to Union S Chicago, 111., a corp Smith, Chicago, Ill.,

pecial Machine Company, oration of Illinois Application October 19, 1949, Serial No. 122,204 20 Claims. (Cl. 112-162) This invention relates to sewing machines intended for industrial use and more particularly to machines of this type adapted to provide a line of overedge stitching of either the twothread or three-thread types.

A primary object of the invention has been to provide a machine of the above indicated character which will operate at high speeds, in the neighborhood of or even above 5500 stitches per minute, without undue vibration and with a minimum of wear and servicing.

Another object has been to provide a machine of the character mentioned which is of compact and relatively simple construction and which may be easily operated. This phase of the invention is directed, in part, to the comfort and convenience of the operator and the ready observation of the stitch forming devices to insure correct formation of the desired seams.

Toward the foregoing ends, a feature of the invention resides in the provision of an enclosed housing at one side of the line of stitching which houses, in a lubricant-tight enclosure, all of the operating devices for the stitch forming elements and also the edge trimming mechanism usually provided in overedge sewing machines.

Another feature, related to th foregoing feature, is the provision of stitch forming instrumentalities and edge trimming mechanism which involves a plurality of operating shafts and rods or bars which are in parallel relation to each other and also to the main operating shaft of the machine.

A further feature is the provision of an overedge stitch forming member which is subiected to both longitudinal bodily movements and transverse oscillatory movements along and about an axis which is in a relatively high plane, preferably slightly above the work supporting surface. The means for operating this member, moreover, is such that a dwell or reduction in speed is provided toward one end of the stroke of reciprocation or bodily movement of the member. This .is such that relative rapid bodily movement occurs, toward and away from the needle, when the thread engaging portion of the member is above the work support and a slower bodily movement occurs when such thread engaging portion is below the work support. Better stitch formation results from this. It also permits the machine to be used more advantageously for the stitching of heavier materials, since the active and of the stitch forming member may be carried a greater distance from the throat plate in its movements around and ver the ed e of the work.

In attaining the foregoing objects a still further feature of the invention resides in the relative arrangement of the various stitch forming instrumentalities. This includes not only the provision of two looper rods parallel with the main shaft of the machine, and each arranged to be reciprocated longitudinally of its axis, but also the positioning of one of these rods above and behind the other. The upper rod, moreover, is given oscillatory movements as well as reciprocatory movements. Both rods are operated across the line of feed and all of the operating mechanism for both rods is located to the right of the needle or the line of stitching. The operating means for the needle is similarly located. All of these features contribute to the production of uniform stitches, with a minimum risk of incomplete stitch formation, and in such a manner that the point of stitch formation is visible without requiring the operator to assume an awkward position.

Other obiects, features, and advantages of the invention will appear from the detailed description of an illustrative form of the same which will now be given in coniunction with the accompanying drawings, in which:

Fig. 1 is a front elevational view of the machine, a portion of the work supporting plate being broken away to show normally concealed parts;

Fig. 2 is a longitrdinal section through the machine, taken along its axis;

Fig. 3 is a detail view, in vertical section, illustrat ng a. modification in which the overedge, threaded looper is replaced by a spreader;

Fig. 4 is a horizontal section through the machine, taken along the broken line 44 of Fig. 2;

Fig. 5 is a view partially in end elevation and partially in vertical section, taken substantially along the line 55 of Fig. 1;

Fig. 6 is a detail view in section, through the presser bar tensioning means, taken along the line 66 of Fig. 5;

Fig. 7 is a vertical sectional view through the machine, taken along the line 'l--'! of Fig. 2;

Fig. 8 is a detail view, in vertical section along the line 88 of Fig. 4, showing certain of the operating connections in the machine;

Fig. 9 is a similar detail view, in section along the line 9-9 of Fig. 4, showing additional operating connections;

Fig. 10 is a detail view, partly in plan and partly in horizontal section, showing the construction and mounting of the presser foot; and

Fig. 11 is a. diagrammatic view illustrating the an arm .32 secured to a rock shaft 33.

relative positions of the stitch forming instrumentalities at different points in the cycle of operation of the machine.

Referring now to the drawings, the illustrative machine has a main frame a large portion of which .is in .the form of an enclosed housing, including a vertical wall structure U] (Fl-gs. 1 and 2) a bottom H secured in oil-tight relation to the wall structure in any suitable way as by means of screws, and a top cover 12 disposed on a slope, as shown, and secured to the vertical walls by screws 13. The left hand end of the housing (Fig. 2) is closed by a substantially vertical wall M from the lowerend of which an extension l5 projects beneath the work supporting member or cloth plate It of the machine. Between the extension l5 and the work supporting member IS, a partially enclosed space is provided for certain of the stitch-forming and I work-feeding devices to be hereinafter described.

An' upward extension 11 "at the rear of the lateral extension l fi-serves, in part, to support the work supporting member l5, which is pivotally carried by a pin 18. This permits the work support to be "swung outwardly to provide access to the mechanism normally beneath the work support, for threading the loopers and inspecting and adjusting various parts. It also permits the seaming of the edge of circular work. One pivot pin 49 there is swingably mounted a partial cover member 2% (Figs. 1, 2 and 4) arranged normally to substantially enclose the major portion of the work feeding devices. Member 29 has an outwardly projectng ear H which fits between a pair of lugs 22, formed on the member H, which carry the pivot pin IE. The cover member '26 is left in its normal projecting position when circular work is being seamed.

Toward the forward end of the lateralextension IS an upwardly extending pedestal 23 is provided to support a portion of the trimmer mechanism, as will be explained, and to assist in partially enclosing the mechanism. To the top of the pedestal is secured a throat plate 2311 which complements the work supporting member [6.

A main operating shaft 24 extends longitudinally in a horizontal direction through the lower portion of the main housing. Shaft 2 1 is formed in two sections, for assembly purposes, these having te escoping ends clamped together by screws 2406 (Fig. 2). The shaft projects rom the housing at both ends. Adjacent its left end (Fig. 2) it is journalled in a bushing 25, mounted in a boss projecting from wall it, while at an intermediate point it is journalled in a bushing carried by a transverse wall '26 extending between and formed integral with the front and rear walls of the housing. Adjacent its right end, the main shaft is supported by aball bearing 2'! carried by a bushing 28 mounted in the right end wall of the housing. Bushing 28 preferably has a radially extending flange at its outer end by means of which it may be secured, by screws or the like, to the wall of the housing. To the outer end of the shaft 25, which projects beyond the bushing 28, there is secured a combined handwheel and pulley 23.

The stitch-forming'instrumentalities include a curved needle 3-3 which, as best shown in Fi 5, is carried by a head 3! at the upper end of The latter is journalled in a bushing 34 which extends through the wall l i of the housing. Within the housing a split sleeve 3.5 (Fig. '8) is secured to the shaft 33, this sleeve having a forwardly projecting arm 36 which is pivotally connected with a pitman 3'! having, at its lower end, a strap 38 cooperating with a cylindrical crank portion 39 of the main shaft 2 5. This arrangement is such that upon rotation of the shaft 24, the shaft 33 will be rocked to carry the curved needle from the position indicated in Fig. 5 to a position in which the eye of the needle is beneath the work support and in the path of an under looper now to be described.

In the machine illustrated, an under looper 4!) (Fig. 2), of generally U-shaped form at its active end and provided with a thread carrying eye, is secured by a set screw M to the outer end of a reciprocating, shaft-like rod $2. This rod is mounted for longitudinal sliding movement in a bushing 43 carried by the wall it of the housing and a bushing l i carried by the intermediate wall 26. Between the bushings t3 and it there is secured to the rod a block t5 (Figs. 2 and 7) having a horizontally extending trunnion arranged for pivotal connection with a link it the opposite end of which is pivotally connected at M to the lower end of an arm The latter is integral with and extends down wardly from a sleeve 49 rockably mounted on a stationary shaft 50 carried by the front and rear walls of the housing. Sleeve 49 has a laterally extending arm '5! providing a split collar to receive and clamp a ball pin 52. A screw 53 serves to clamp the ball pin in the split collar. Cooperating with the ball surface of the pin is a strap 5 carrying a downwardly extend ng rod 55 connected with another strap 56 arranged to cooperate with a spherical eccentric portion 57 of the main shaft .2 2. Rod and straps 5d and 56 are arranged to provide an extensible link for connecting the eccentric or crank with the ball pin 52. Through the connections described, the rod 42 and hence the under looper 48 will be reciprocated upon each revolution of the main shaft.

An overedge looper 58 (Fig. 2), which may also be provided with a thread carrying eye, is secured in any suitable way to a shaft-like rod 59 which is adapted 'to receive both oscillatory and reciprocatory movements. As shown in Fig. 3, the thread carrying looper may, if desired, be replaced by a forked spreader 58a adapted to be secured to the oscillatory and reciprocatory rod 59. Similarly, the under looper ill may be replaced, if desired, by a spreader having a forked end, like that of the element 58a, in which case the overedge member should be a thread carrying looper. The coordinated operation of the stitch-forming elements will be hereinafter described in relation to Fig. 11.

The rod 59 is supported by a bushing Eli, carried by the wall M of the housing, and b another bushing 6i carried by the wall 26 (Figs. 2 and 4). For imparting oscillatory movements to the rod, its inner end is provided with a crank arm 82 from which projects a ball pin 63 cooperating with a strap 6 at the upper end of a pitinan 65. The lower end of this pitman carries a strap 66 cooperating with a spherical eccentric portion 6"! of the main shaft 2t. It will be apparent that upon rotation of the shaft 2 5, the arm 82 together with rod 59 and looper 58 will be oscillated, the arrangement being such that the active end of the looper is carried from a point below the work support to a point well above the latter.

Longitudinal reciprocations are imparted to the rod 59 in the following manner. A block 68 (Figs.

- 5 2 and 9 is freely mounted on the rod between two collars 59 which are clamped to the rod. This arrangement is such that relative rotation may take place between the block and the rod, but the two elements partake of longitudinal movements together. Projecting rearwardly from the block 68 is a trunnion r pin 68a to which is pivotally connected one end of a link I0, the other end of which is pivotally connected to the lower end of an arm H having a hub or sleeve mounted for free rocking movement on the fixed shaft 5!] (Fig. 7). Intermediate the ends of the arm ll there is pivotally connected thereto, at 72, one end of a pair of links 73 pivotally attached at their upper ends to an arm 74 extending upwardly and toward the right (Fig. 2) from a sleeve i5 which is mounted for rocking movement upon a fixed shaft 76. Sleeve 75 is held against axial movement along the shaft it by a pair of fixed collars fl (Fig. 9). The pivot pin 13, which serves to connect the links 73 with the arm 14, is of greater length than required for this purpose. As shown in Fig. 4 it preferably passes through the arm 76 into a parallel companion arm 19 extending outwardly from the sleeve 15. It is held fixed in the arm i l by a screw 80. Adjacent its outer end pin 18 is provided with a ball BI which cooperates with a strap 82 (Figs. 2 and 9) connected by a rod 83 with one side of a strap 84 surrounding a spherical eccentric 85 carried by the main shaft M. It will be apparent that upon each revolution of the shaft 24, the rod 83 will be reciprocated vertically and will, through the linkage explained, reciprocate the block 68 together with the rod 59. As Will be explained more fully hereinafter, these operating connections are such that a relatively rapid longitudinal movement is imparted to the rod '53 adjacent one end of its stroke and a slower movement is imparted to it toward the other end of its stroke.

Referring now to the diagram of Fig. 11, there is indicated the relative timing of the three stitch forming instrum'entalities, i. e., curved needle 38, under looper it, and overedge looper 58. The numbered positions indicated for the points of these three elements correspond with 30 increments of rotation of the main shaft. The three elements are illustrated in their number 9 positions, in which the curved needle has passed well below the work and is approaching the lower end of its stroke. The under-looper is at the extreme left hand end of its stroke and the overedge looper is being retracted from a position above the work to one beneath it. As the needle descends further, the under looper will start its movement toward the right and it will continue such movement during most of the return stroke of the needle. It will pass through the loop of the needle thread upon the initial upward movement of the needle, i. e., between the 11 position and the 0 position. The thread carried by the under looper will thus be carried through the needle thread loop and will be passed into the path of the overedge looper 58. The latter will then pass its thread through the loop of the under looper thread as the parts are moving from the 1 to the 2 position. As the cycle continues, the overedge looper thread will be carried around the edge of the work and up over the latter to the 6 position. As the overedge looper is moving from the 5 to the 6 position the needle will be on its downward movement again and will pass through the loopof the overedge looper thread.

This cycle will be repeated continuously during the operation of the machine to form a threethread overedge line of stitching. It is understood, of course, that the work will be advanced between successive stitches by the mechanism to be hereinafter described.

If desired, a two-threadoveredge stitch may be formed by substituting a spreader for one or the other of the loopers 40 and 58. If a spreader, which is in effect a looper with a thread engaging fork instead of a thread carrying eye, is substituted for the under looper. this will pickup the loop of the needle thread and carry it into the path of the overedge looper, so that the latter with its thread will pass. through the loop of the needle thread. Otherwise the operation is the same as in the formation of a three-thread stitch. Similarly if the overedge looper is replaced by a spreader, the forked end of this spreader will merely seize the thread of the under looper, when the latter is between the 1 and 2 positions, and will carry the under looper thread upwardly and over the work into the path of the needle which will then pass its thread through the loop of under looper thread.

It will be noted that the path of the point of the overedge looper from point 3 to point 6 and and then back to point 9 is inclined at a greater angle to the vertical than the balance of its path from point 9 to point 0 and back to point 3. A dwell or slower movement of the overedge looper, so far as longitudinal reciprocation of the rod 59 is concerned, is thus clearly indicated. The more rapid movement during the first mentioned half of the cycle permits a greater, clearance to be provided between the overedge looper and the edge of the cloth plate without giving the rod an undully longstroke. As previously indicated, this has various advantages, including the possibility of handling heavier work.

Any suitable means may be employed for feeding the work past the stitch forming point. Preferably this is of the differential type, involving a main feed dog 86 (Figs. 4 and 5) and a differential feed dog 81. These are given different feed strokes and suitable mechanism for this purpose will nOW be briefly described. Feed dog 86 is secured by a screw 86a to the forward end of a main feed bar 88 which is forked at its rearward end to straddle a square block 89 rockably mounted on a fixed shaft 90 carried by the main frame. At its forward end the feed bar 88 is also forked to straddle a square block '9! (Fig. 2) mounted on an eccentric portion of the main shaft 24. This arrangement is such that upon rotation of shaft 24 the forward end of the feed bar will be lifted and lowered to impart corresponding movements to the feed dog. Feed stroke and return movements are imparted to'the latter by means of a strap 92 cooperating at its forward end with an eccentric portion 93 (Fig. 2) adjacent the outer end of the main shaft 24. The various parts are held in assembled relation on the main shaft by a nut 94. At its other end the strap 92 is provided withan opening which snugly receives a pin 95 extending laterally from the feed bar 88. It will be understood that suitable openings, are provided in various intervening parts to permit the free passage of this pin. A nut 96 holds the various parts in assembled relation. It will be seen that upon rotation of the main shaft-ri l, the eccentric; 9% will impart longitudinal movements to the feed barfor. the feed and return strokes, thereof. The vertical throw of the-strap t2 by the eccentric. 93 will, of course, be ineffective and will simply rock a sence the strap about pin 95, since the vertical position ofthe feed bar {is controlled by the eccentric -within {the square b11 6 .8]

of which surrounds an eccentric '89 on the main shaft M. At its rearward end the strap 98 is apertured toreceive a pin 400 extending laterally from the auxiliary feed bar. A not till serves to maintain the parts in assembled relation. It will be understood that longitudinal movements will be imparted-to the deed bar e1 upon rotation of the eccentric 9:9 to provide the desired feed and return movements of the dilTe-rentia'l feed dog.

Should it be desired to vary the-strokes of either of the feed dogs this may bereadily accomplished by substituting different eccentrics 93 and 99. Theseare preferably .in the form of small annular members which may be freely applied to or removed from the shaft 2%., but are suitably keyed thereto ina predeterminedangular position. They may be removed and replaced upon the simple removal of. the nut 34.

For holding the work against the throat plate, and cooperating with the feed dogs in advancing the work along the line :of stitching, is a presser foot $2. This may be of any suitable form, but in the preferred embodiment is of the type shown in Fig; 1-0. It is pivotally mounted by means of a pin IE3 at the lower end of a downwardly curved, horizontally disposed presser bar or arm IM. Pin I03 has screwthreaded engagement with an opening in "the presser bar to retain the foot thereon. Bar N34 is secured, by s rews IBM, to a short forwardly extending arm IE (Figs. 4. and '5) integral with a yoke I65 pivotally mounted on a pin IN. The latter is carried by a member 198 which fits between two branches of the yoke tilt and has an integral split collar Hi9 by means of which it is secured to a rock shaft I It mounted in suitable hearings in lugs I H and H2 extending rearwardly from the main frame. An arm H3 is freely mounted on the shaft MG and is normally urged upwardly 4) or in a clockwise direction (Fig. 5) by a spring I'M. The hublike portion of the arm I i3 which surrounds the shaft I Iii has a downward extension H5 adapted to cooperate with the end of a set screw H5 mounted in a downwardly and laterally extending arm N1 of the collar H19. When the arm I I3 is rocked downwardly, or in an anti-clockwise direction, by any suitable means, such as a rod or chain connected with an eyelet iifia at the outer end of the arm, the projection H5 will engage the end of the screw HE and rock the collar together with the shaft i It! and will cause the presser bar 104 to be rocked anti-clockwise to lift the presser :foot.

For normally urging the presser foot against the work, a yoke I I8 is arranged to straddle the presser bar at an intermediate point. yoke is carried at the lower end of a rod I I9 slidably mounted in a sleeve I which is, in turn, slidably mounted in a log IZI extending outwardly from the wall 44 of the irame. A pin l22 extending inwardly into the path of the sleeve 4-20,

. free to be shifted axially of the lug.

from the lug I2I, cooperates with a T-slot in the sleeve I 26. When the'pin is aligned "with the vertical portion 123 of the T-slot the sleeve is However, if the sleeve is rotated slightly in either direction to place the pin I22 in one of the cross arms formed by the top 24 of the T-slot, the sleeve will be locked against axial movement in the lug. Surrounding a reduced portion of the rod H9 within the sleeve lid is a spring H5. The lower end of this spring cooperates with the shoulder provided by the enlarged lower portion of the rod, while the upper end cooperates with a washer I26 carried at the upper end of a bore within a screw threaded member it? which has threaded engagement with the sleeve i28. By turning of the member I-2'I, through the knurled thumb piece 128, the axial position of the member in relation to sleeve 52.9 may be varied to adjust the tension of the spring. An enlarged head I29 is provided at the upper end of the rod I 59 to limit the downward movement of the rod under the influence of the spring when the yoke H8 is disengaged from the presser bar, in the manner to be explained.

By turning the sleeve I28 to bring the vertical slot I23 in line with the pin M2, the tension on the spring I25 may be fully released and the yolze its may then be readily disengaged from the presser bar I04. This will permit the latter to be swung outwardly about the pivot pin I81 through any desired angle, up to about The presser foot I02 is thus carried away from the throat plate and threading of the loopers is facilitated. Also, the throat plate may then be readily removed for inspection and adjustment of the parts beneath it.

As shown in Fig. 10, the presser foot is preferably provided with a stitch finger I30 which extends over a recess or cut-out IS! in one side of the presser foot adjacent the point of stitch formation. The stitch finger is preferably made adjustable transversely of the presser foot. For this purpose it is formed on a member 132 having an elongated slot I33 cooperating with the shank of'a screw I34. Member I32 is of U-shaped form at its outer end to accommodate the blades of the trimming mechanism now to be described.

A stationary blade I35 is suitably mounted-in an inclined position in a plane parallel with the line of stitching, on an adjustable block I36 carried by the pedestal 23. The blade I35 may be clamped in the block in any suitable way as by means of a bolt 131 extending through the block and having an enlarged slotted head at its outer end which holds the blade against the face of the block. A not I38 holds the bolt in clamping position. Block I38 is mounted for adjustment in a direction transverse to the line of stitching by supporting the same in a groove or rectangular recess formed in the forward face of the pedestal (Fig. 5). A guide plate I39, secured by a screw M0 to the forward face .of the pedestal, serves to assist in retaining the block in the recess. A screw MI, the shank of which cooperates with a slot I42 extending through the block I86 at the outer end thereof, serves to clamp the block in any position desired. Adjustment of the block may be effected, when the clamping screw MI is loosened, .by turning an adjusting screw I43, the enlarged head of which engages the end of the block and the shank of which is threaded into a suitable Opening i the pedestal 23. It will be apparent that the means described will permit admain shaft 24, adjacent the bearing 21. be noted from Fig. 2 that the disc I64 is the.

justment of the blade I35 in a direction transverse-to the'line of stitching to the position desired, depending upon the width of the overedge stitching selected. The vertical position of the blade may be adjusted by loosening the clamping means I31, I38.

Cooperating with the stationary trimmer blade is a movable blade I44 (Figs. 1, 4 and which is preferably substantially L-shaped in cross-section. The cross-section of the blade is best shown in Fig. 4. mounted in an inclined groove provided in the outer face of a block I45 and a corresponding inclined groove in a collar I46. The block and collar are mounted on a head I41 at the outer end of an arm I48. A screw I49 (Fig. 1) serves to'clamp the collar I46 and block I45 to the head. Screw I49, for this purpose, cooperates with a nut I50 mounted in a channel provided in the head I41. Thischannel (Fig. 5) extends This blade is adjustablyv in a direction transverse to the line of stitching. Substantial clearance may be provided be,- tween the nut and the top and bottom surfaces of the channel but the latter serve to prevent rotation of the nut. Block I preferably has an inward extension I5I cooperating with a guide slot in the forward face of the head I41. This guide slot is parallel with the channel and may extend into the latter. The arrangement. is such that upon the loosening of the screw I49 the Tightening of the screw serves to retain the with a fine mist or spray. Some of the lubricant in this form will be carried directly to certain of the wear receiving surfaces, while some will collect on the top closure I2 and will drip from the latter onto various bearing surfaces. Suitable downwardly extending projections may be provided on the cover I2, if desired, to facilitate such delivery of the lubricant to special points. Openings may be provided in the tops of the various sleeves, bearings, and the like to permit the lubricant to reach the pins or shafts about which relative rotation takes place.

The only mechanism outside of the enclosed housing which requires lubrication is the work feeding mechanism. For the lubrication of this, a pair of tube I66 is provided through the wall I4 (Fig. 7). These tubes carry wicking I61 and I68. The portion of this wicking which extends downwardly within the enclosed housing, as shown in Figs. 7 and 8, will collect lubricant from the mist generated in the housing, including some which may trickle down the inner surface of the wall I4. This lubricant will then be delivered by the wicking to the work feeding mechanism outside of the housing. Wicking I61 is preferably extended along the upper surface of the pitman parts in adjusted position. Proper coaction be- I ly extending arm I which carries a strap I56 at its lower end, cooperating with a ball pin I51. The latter extends transversely from a pit- .man I58 having a strap I59 (Fig. 2) surrounding a cylindrical eccentric or crank portion I60 of the main shaft 24. It will be apparent that upon rotation of the shaft 24 the shaft I52 will be oscillated to carry the trimmer arm 1148 and bladev I44 downwardly and then upwardly about the axis of shaft I52. I6I (Figs. 1 and 4) is secured to the outer face of the wall I4 by screws I62 to provide a hard .bearing surface for the adjacent end of the head A guide block I41, as the latter is, reciprocated.

q Within the main housing of the frame, a body of lubricant I63 (Fig. 2) is provided and this is adapted to be whipped into a fine mist or spray by a disc I64 having a hub I65 clamped to the It will only part of the mechanism within the housing which dips into the oil. This makes for quick starting of the machine, since 'the only resistance to turning of the main shaft, so far tional resistance between the lubricant and the I relatively smooth faces of the disc. I The latter,

upon rotation at the high speeds -of operation of the machine, will completely fill the housing 98 from which it is readily delivered to the various bearing surfaces within the partial closure 20. Wicking I68 may be extended in the opposite direction to supply lubricant to the rear bearing surfaces of the block 89. Suitable openings may be provided in the various members to enable delivery of adequate lubricant to the several bearing surfaces.

Excess lubricant dripping from the work feeding mechanism accumulates in a sump formed beneath the latter and is returned to the main supply within the housing, by gravity. A screen I69 and a felt filtering member I15 are provided at the bottom of the lubricant collecting sump to remove particles of lint, filler, and the like from the lubricant before it is returned, through a passage I1I in the extension I5, to the interior of the housing.

It will be understood that Various accessory devices, such as thread guiding and controlling means, including thread tensioning devices, will be provided for the supply of thread to the several stitch forming instrumentalities. Since the details of these devices form no part of the present parts outside of the main housing. The trimmer mechanism, however, is disposed in front of this cover member to render it accessible and to enable the cover member to deflect the trimmings away from the mechanism.

While an illustrative embodiment of the invention has been disclosed in considerable detail, it will be understood that numerous changes may be made in the construction and arrangement of the various parts without departing from the 'general principles and scope of the invention.

In the claims, which follow, the term looper 1 should be construed as embracing both a member 7 O '-as the lubricant is concerned, is the small frichaving a thread receiving eye and one having a loop engaging end serving as a spreader.

of stitch forming elements including a needle, an

under looper and an overedge element, a plurality of parallel shait like members each carryin'g'one ofsaid' elements in fixed relation thereto, means for supporting said shaft-like members and re-v tai'n-ing their axes in fixed relation, a main drive shaft, and connections from said drive shaft to said element carrying members for'operating said elements in properly timed relation to effect overedge stitching, said connections being arranged to impart both oscillatory and reciprocatory movement to at least one of said members,

2. In an overedge sewing machine, a plurality of stitch forming elements including a needle, an under looper and an overedge element, each of said elements having a thread engaging portion, a plurality of constantly parallel shaft-like members each carrying one of said elements in fixed relation thereto, a main drive shaft parallel with said plurality of members, and connections from saiddrive shaft to said element carrying members for operating said elements in properly timed relation to effect overedge stitching, said connections being arranged to impart tothe thread engaging portion of one of said elements a movement having a component transverse to. and a component parallel with the axis or the related shaft-like member.

3. In an overedge sewing machine, a plurality of stitch forming elements including a needle, an under looper and an overedge element, a plurality of parallel shaft-like members each carrying one of said elements in fixed relation thereto, a main drive shaft and connections from said drive shaft to said element carrying members for operating said elements in properly timed relation to effect overedge stitching, said connections being arranged'to impart to one of said element carrying members oscillatory movements only and to another of said members reciprocatory movements only and to another of said members combined oscillatory and reciprocatory movements about and along a fixed axis.

4-; In an overedge sewing machine, a plurality of stitch forming elements including a needle, an underlooper and an overedge element, a plurality of parallel shaft-like members each carrying one of said elements in fixed relation thereto, a main drive shaft, and connections from said drive shaft to said element carrying members for operating saidelements in properly timed relation to efiect overedge stitching, said connections being arranged to impart to the needle carrying member oscillatory movements only and to said under looper'carrying member reciprocatory movements only and to said overedge looper carrying member combined oscillatory and reciprocatory movements about and along a fixed axis.

5. In an overedge sewing machine, a plurality of stitch forming elements including a needle, an under looper and an overedge element, each of said elements having a thread engaging portion, a plurality of parallel shaft-like members each carrying one of said elements in fixed relation thereto, means for trimming the edge of the work adjacent the point of stitch formation, said means comprising a movable trimmer blade, a shaft parallel with said shaft-like members for operating said movable trimmer blade, a main drive shaft, and connections from said drive shaft to said element carrying members for operating.

said elements in properly timed relation to efiect overedge stitching, said connections being arranged to impart to the thread engaging portion of one of said elements a movement having a component transverse to and a component parallel with the axis of the related shaft-like member,

12 and connections from said, main shaft to said shaft for operating said trimmer blade,v

6. In an overedgesewing machine, a pl lity of stitch forming elements including a needle,- an under looper and an ovcredge element, a plurality of shaft-like members each carrying oncof said elements in' fixed relation thereto, the vertical planes containing the axes of said members being in parallel relation to eachother, a main drive shaft parallel with all of said vertical planes, said drive shaft havinga plurality of eccentric-means thereon, and connections from said' eccentric means on said drive shait to said element carry ing. members for operating said elements in properly timed relation to effect overedge stitch ing, said connections: being arranged to impart both oscillatory and reciprocatory movement to at least one of said members.

7.. In an overedge'sewing machine,. a plurality of stitch forming elements including a needle, an under looper and an overedge elemenma plu-r rality of constantly parallel shait'elike members each carrying one of said elementsin fixedrce lation. thereto, a main drive shaft parallel with said: plurality of members, said-drive,-sharia-hav-- ing. a plurality ofv eccentric means thereon, oer: tain of said eccentric means having spherical peripheral surfaces and another having; a eye lindrical peripheralv surface, and connections from said eccentric. means on said drive shaft to said. element carrying members for'operating said: elements in I properly timed relation to effect overedge stitching.

8. man overedge sewing machine, aplurality or stitch forming elementsiinoluding a needle; an under looper and an overedge element, a plurrality of constantly parallel shaftelike members each carrying one of said elements in fixed'relaition thereto, a main drive shaft, and connections from said drive shait to said element carrying members for operating saidelements in properly timed relation to-efieot overedge stitching; said connections being arranged to. impart to: the needle carrying member oscillatory movements only and to said under looper carrying'member reciprocatory movements only and to said over edge looper carrying member combined oscll:- latcry and reciprocatory movements, said connections for imparting reciprocatory: movements to said overedgr looper including'meansfor imiparting more rapid movements towarduone end of the stroke thereof" than toward the other end.

9; An overedge loopermechanism=- comprising a looper carrying rod mounted for axial reoiprocation and for oscillation along and about a' fixed axis, a main drive shaft parallel with sald' looper carrying rod, a plurality of eccentric means. on said drive shaft,- connections from: one of said eccentric means to said looper carrying rod for oscillating the same; andconnectlons-irom'anotherofsaid eccentric means to said looper carrying rod for. reciprocating thessame.

10. An overedee looper mechanism. comprising aloopen carryin r d-m unted ql" ax al 'lfiGiDlQ- cation a d. or lla on alone an a out a fixed axis,a main drive shaft. parallel with said looper c rryin ro a plurality of cc tri m nson sa d. d ive af nnecti ns from. ne 0i said ecc ntric means to said. loo er carrying rod 9 cscillat nsthc-sama a i another ofisaid eccentr cmcanstosaid lo pe ca r ing: rod: fo recipr catin t e ome, said las mentioned con e tions in udi g means or producing more rapid axial movement of said rod ese 13 toward one end of its stroke than toward the other end.

11. An overedge looper mechanism comprising a looper carrying rod mounted for axial reciprocation and for oscillation along and about a fixed axis, a main drive shaft parallel with said looper carryingrod, a plurality of eccentric means on said drive shaft, connections from one of said eccentric means to said looper carrying rod for oscillating the same, and connections from another of said eccentric means to .said looper carrying rod for reciprocating the same, said last mentioned connections including a toggle arranged to produce more rapid axial movement of said rod toward one end of its stroke than toward the other end.

12. An overedge looper mechanism comprising a looper carrying rod mounted for axial reciprocation and for oscillation along and about a fixed axis, a main drive shaft parallel with said looper carrying rod, a plurality of eccentric means on said drive shaft, connections from one of said eccentric means to said looper carrying rod for oscillating the same, and connections from another of said eccentric means to said looper carrying rod for reciprocating the same, said connections being such as to provide for .reversal of direction of the oscillatory and reciprocatory movements at substantially the same time and to cause said looper to traverse substantially the same path in both directions.

13. An overedger comprising a frame having an enclosed, lubricant-tight housing, a main drive shaft extending through said housing and projecting therefrom at both ends, means mounted on one end of said shaft for driving the same, stitch-forming means comprising a needle, an underlooper and an overedge looper outside of said housing, a plurality of shaft-like members extending through a wall of said housing, each of said plurality of members being connected in fixed relation to one of said stitch forming means, and connections within said housing from said drive shaft to each of said plurality of members for imparting stitch-forming movements to said means.

14. An overedger comprising a frame having an enclosed, lubricant-tight housing, a main drive shaft extending through said housing and projecting therefrom at both ends, means mounted on one end of said shaft for driving the same, stitch-forming means comprising a needle, an under-looper and an overedge looper outside of said housing, a plurality of shaft-like members extending through a wall of said housmg, each of said plurality of members being connected in fixed relation to one of said stitch forming means, and connections within said housing from said drive shaft to each of said plurality of members for imparting stitch-forming movements to said members, said connections being arranged to impart bodily reciprocation to said needle and underlooper and a combined oscillation and bodily reciprocation to said overedge looper.

15. An overedger comprising a frame having an enclosed, lubricant-tight housing, a main drive shaft extending through said housing and projecting therefrom at both ends, means mounted on one end of said shaft for driving the same, stitch-forming means comprising a needle, an underlooper and an overedge looper outside of said housing, a plurality of shaft-like members extending through a wall of said housing, each of said plurality of members being connected-in fixed. relation to one of, said stitch forming means, and connections within said housing from said drive shaft to each of said plurality of members for imparting stitch-forming movements to said members, said connections being arranged to impart bodily reciprocation to said needle and underlooper and a combined oscillation and bodily reciprocation to said overedge looper, the bodily movement of said overedge looper being more.v rapid toward one end of its stroke than toward the other. 16. An overedger comprising a frame having an enclosed, lubricant-tight housing, a main drive shaft extending through said housing and projecting therefrom at both ends, means mounted on one end of said shaft for driving the same, stitch-forming means comprising a needle, an underlooper and an overedge looper outside of said housing, work trimming mechanism including a movable trimmer blade adjacent the point of stitch formation, a plurality of shaftlike members extending through a Wall of said housing, each of said plurality of members being connected in fixed relation to one of said stitch forming means and movable trimmer blade, and connections within said housing from said drive shaft to each of said plurality of members for imparting stitch-forming movements to said means and work trimming movement to said trimmer blade.

17. In an overedge sewing machine a needle reciprocated in a vertical plane containing the line of seam formation, an under looper, a rod carrying said looper and mounted for longitudinal reciprocation in a direction perpendicular to said plane, an overedge looper, a rod carrying said overedge looper and mounted for longitudinal reciprocation in a direction perpendicular to said plane and for oscillation about its axis, said overedge looper carrying rod being disposed above and in rear of said under looper carrying rod, a main drive shaft, and connections from said shaft for operating said needle and said rods in coordinated relation to effect overedge stitch formation.

18. In an overedge sewing machine having a horizontally disposed throat plate, a needle reciprocated in a vertical plane containing the line of seam formation, an under looper, a rod carrying said looper and mounted for longitudinal reciprocation in a direction perpendicular to said plane, an overedge looper, a rod carrying said overedge looper and mounted for longitudinal reciprocation in a direction perpendicular to said plane and for oscillation about its axis, said overedge looper carrying rod being disposed above said throat plate, a main drive shaft, and connections from said shaft for operating said needle and said rods in coordinated relation to eifect overedge stitch formation.

19. In an overedge sewing machine a needle reciprocated in a vertical plane containing the line of scam formation, an under looper, a rod carrying said looper and mounted for longitudinal reciprocation in a direction perpendicular to said plane, an overedge looper, a rod carrying said overedge looper and mounted for longitudinal reciprocation in a direction perpendicular to said plane and for oscillation about its axis, a main drive shaft, and connections from said shaft for operating said needle and said rods in coordinated relation to effect overedge stitch formation, said connections being all disposed at one side of said vertical plane.

20. In an overedge sewing machine a needle References Git'ed mthe file of this patent unr'nfin sTATEs PATENTS Numfir Name Date 2 ,I 5(T,-536 LutZ: m May 2-, 1939 $238,796 mans M Apt, 15;, 1941

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