US1525104A - Trimming mechanism for sewing machines - Google Patents

Description

Feb. 3, 1925. 1,525,104

R. M. SHARAF TRIMMING MECHANISM FOR SEWING MACHINES Original Filed Oct. 24. 1916 6 Sheets-Sheet .1

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A TTOHNE Y Feb. 3. I925- R. M. SHARAF' TRIMHING MECHANiSM FOR SEWING MACHINES Original Filed on. 24, 191

6 Sheets-Sheet z A TTOHNE Y Feb. 3, 1925. 1,525,104

R. M. SHARAF TRIHIING MECHANISM FOR SEWING IIACHINBS Original Filed Oct. 24, 1916 6 Sheets-Sheet 3 INYE I? ATTOHNE Y Feb. 3. 1925. i 7 1,525,104

R. M. SHARAF TRIHMING MECHANISM FOR SEWING IIACHIIIBS Original Fil d on, 24, 1916 6 Sheets-Sheet 4 [NV N 0!? ATTOHNE Y Feb. 3,1925. 1,525,104

- R. M. SHARAF TRIIIIING uscrmusu FOR sawmo lucanms fiinal Filed Oct. 24. 1916 6 Sheets-Sheet s A TTOHNE Y Feb. 3, 1925.

R. M. SHARAF THINKING MECHANISM FOR SEWING MACHINES Original Filed Oct. 24, 1916 6 Sheets-Sheet 6 A TTOHNE Y Patented Feb. 3, 1925.

UNITED STATES PATENT OFFICE.

RALPH M. SHARAF, OF BOSTON. MASSACHUSETTS, ASSIGNOR TO R. M. SHARAF MA- CHINE CO., OF BOSTON, MASSACHUSETTS. A CORPORATION OF MASSACHUSETTS.

TRIMMING MECHANISM: FOR, SEWING MACHINES.

Application filed October 24, 1916, Serial No. 127.322.

To all whom it may concern:

Be it known that I, RALPH M. SHARAF, aciiizen of the United States, and a resident of Boston, in the county of Suffolk and State of .dassachusetts. have invented a new and Improved Trimming Mechanism for Sewing Ritachines. of which the following is a full, clear, and exact description.

This invention relates to sewing machines and has particular reference to machines of (he two-needle type.

Among the objects of the invention is to provide a tv-wo needle sewing machine having a differential feed for the cloth and in which there is employed a peculiar means for applying lace to the cloth and stitching it thereto while the two seams are being formed in either a straight or a curved line.

it still further object of the invention is to provide in connection with the lace applying and cloth feeding devices a peculiar form of cutting means to cut out the cloth below the lace and between the two seams, such cutting means being operated automatically and simultaneously with the operulion of the stitching mechanism.

The foregoing and many other objects of the invention will be hereinafter more fully set forth and the means for accomplishing such objects will be hereinafter specifically claimed.

For a further understanding of the construction in a preferred embodiment, reference is to be had to the drawings forn'iing a part of this specification in which like character of reference indicate corresponding parts in al the views. and in which Figure l is a front elevation of a conventional form of sewing machine head and operating mechanism to which is applied my novel means for controlling the several independent cloth feeding devices from below the table:

Figure 2 is a perspective view of the needle mechanism and lace operating devices ed therewith:

I) is a vertical section of the machine head and table substantially on the line I) J, of Figure 1;

Figure a partial view of the same with parts in dillcrent 'iositions of adjustment Renewed February 18, 1922. Serial No. 537.644.

Figure 5 is a vertical section on the line ;i5 of Figure 3:

Figure (l is an end elevation of the machine head showing the needle and feeding mechanisms Figure 7 is a partial vertical section of the same showing the lace feeding and cloth cutting devices in retracted position;

Figure 8 is a similar view showing the lace feeding and cloth cutting devices in the opposite position:

Figure 9 is an enlarged view of the lower end of the lace feeding bar and blade;

Figure 10 is a vertical section of the same indicating the preferred manner of adjusting the throw of the lace feeding bar:

Figure 11 is a perspective view of the bottom of the machine showing the general arrangement of the adjusting means for the differential cloth feed;

Figure 12 is a longitudinal view. partly in section, of the concentric cloth feeding rock shafts;

Figure 13 is a perspective view of the throat plate;

Figure 14 is a perspective view of one of the stationarv cloth cutting blades carried by said throat plate;

Figure 1;) is an enlarged detail illustrating my improved means for connecting relatively movable parts in a detachable manner;

Figure 1G is a side elevation of a part of the cloth feeding mechanism. the parts being in section on the line 1(l6 of Figure 17;

Figure 17 is a plan view of the same: and

Figure 18 is a sectional view indicating a detail of the stitch adjusting mechanism substantially on the line IS IS of Figure 4.

Similar reference characters indicate corresponding parts throughout the several figures of the drawing.

The several parts of this machine may be made of any suitable materials and the relative sizes and proportions. as well as the various details of construction, may be modified to a considerable extent without departing from the spirit of the invention hereinafter claimed.

By way of illustration I show at 10 a common form of sewing machine head supported upon a table ll and having any suitable driving mechanism including a main shaft 12, a driving wheel 13 and a belt 14.

Within or below the bed 15 of the sewing machine is arranged, as usual, theoperating mechanism for the bobbins and the cloth feeding devices. These means include a countershaft- 16 (Figures 3 and 11) having cranks 17 adapted to be rotated from the main shaft 12 by connecting rods 18. Operated from the countershaft 1G in the usual manner is a shaft 19 having miter gear connections at 20 with the several rotary bobbins 21.

Associated with the several needle mechanisms described below are independently movable feeding bars 22 having tooth-ed cloth engaging dogs 23 (Figures 16 and 17; movable upwardly through and reciprocatin rearwardly along spaced openings 24 (l igure 13) in a throat plate 25 secured to the bed of the machine. The front ends of said bars 22 are pivotally connected to short cranks 26 and 26 extending laterally from adjacent the ends of a pair of concentric rock shafts 27 and 28 respectively, the latter being journalcd within the former. The feeding bars have their rear ends lifted by means of a rock shaft 22 operated from the countershaft 16 by means of a fork 22 and a-cam 22". An arm 22" secured to the shaft 22 is connected to the. rear ends of said bars 22 by means of blocks 2:1 over which the bars are slidabhsubstantially horizontally under the opera tion of the main feeding mechanism described below. Adjacent the opposite ends of said shafts 27. 28 are connected other cranks 29 and 29 (Figure 12) respectively which extend therefrom in substantially the same direction as the other cranks. The shafts 27 and 28 are adapted to be 0 cillated or rocked either together or independently of each other whereby the throw or stroke of the feed bars 22 may be the same or different. Any suitable means may be employed to oscillate the rock shafts for the purpose just stated. As a preferred means for accomplishing this result. 1 con nect pivotally to the cranks 29 and 29 a pair of links 30 (Figures 3. 4. 5 and 18) whose other ends are pivoted to a pair of blocks 31 slidable in slots 32 formed in a peculiar construction of radius bar 32 which is operated from the coui'itershaft 1 3 by means of an eccentric 33 cooperating with a fork 34 rigidly connected to said radius bar. The fork is supported upon a short rock shaft journaled to the bottom of the bed. The blocks 31 are movable along the slots 32' toward or to the center of oscillation or axis of the shaft 35 and hence they are movable also outwardly or radially therefrom. By adjusting the blocks and the connected links it) outwardly from the axis of the shaft 35,

the effective throw of the blocks and links. and consequently the effective oscillation of the rock shafts 27 and 28. are correspondingly increased. It follows. therefore. that the throw of each of the feed bars is dc pendent upon the adjustment of the re spective block or in other words. upon the throw of the radius bar as made ef fective through the corresponding crank and link connections. The construction and specific operation of these several link and crank connections for the independent fer-d bars may be carried out in various ways and made effective differently. but in the embodiment of the invention herein et forth. l contemplate that the shafts 27 and 28. whenoscillated together at the same speed. will give the maximum rate of speed to both of the feed bars. and then by de creasing the distance of adjustment of the block 31 outwardly from the center of the shaft 35 with respect to one of said rock shafts. the throw of the feed bar pertaining therelo will be correspondingly decreased to any desired extent. whereby. while one of the feedingbars causes a retardation of the cloth as to one row of stitche-s. the other feeding bar continues in operation at its normal or maximum speed.

In order to variably control the position of the independently slidable blocks 31 along the radius bar. I connect to the several links 30 a pair of distance bars fee which. in this case. are shown extending approximately vertically from said links. and pivotally connected to the pa r of cranks 37 and3T. These cranks are rigidly connected to the ends of a pair of concentric shafts or pivots 38 and 38' respectively. and to the other ends of these shafts are con nected other cranks 39 and 39 respectively. which have independent linked connections at 40 with a pair of slides 41. A double grooved cam plate 42 is journaled upon a bracket 43 beneath the machine bed, the groovesof the plate being indicated at 44 and each having a spiral end 44 and a concentric end 44*. The latter end extends substantially through an arc of 90 degrees, as shown. and the spiral end of the groove pertains to an extent of rotation of the cam plate substantially equal to that just indicated for the concentric end. The groove- 44 are arranged on opposite sides of the cam plate in reversed order. llach of the slides 41 is guided for movement substantially in right lines by means of pins 45 and slots 46 and is provided at its end opposite its link connection 40 with an antifriction roller 47 lying and operating within one of said grooves 44. Figure 3 shows the rain plate adjusted to its mid or normal position whereby the slides 41 and their link connections with the blocks 31 are arranged together or in parallelism, whereby the maximum throw of both feed bars will result. Upon rotation of the cam plate 42 in either direction from the position just indicated, one of the slides 41 will be drawn by means of the spiral end 44 of the groove 44 toward the center or axis 42' of said cam plate. The antifriction roller 47 pertinent to the other slide, however, will follow along the concentric portion 44 of its groove Without disturbing the adjustment of the throw of the feed bar pertaining thereto.

The means for adjusting or rotating the cam plate 42 may be variously controlled, but as herein shown, I form with said plate a series of rack teeth 42 and meshing therewith is a pinion 48 connected to a shaft 49 journaled in a bracket 50 extending downwardly from the machine bed. The shaft 49 is fitted with a pinion 51 shown having engagement with a gear segment jour naled upon any suitable stationary bracket :33 (Figure 1). The gear segment 52 is adapted to oscillate preferably in a vert cal plane at right angles to the plane of the cam plate 42. As a suitable and convenient means for operating the gear segment 52. while the machine is in operation and independently of the driving and stitch forming mechanisms, I provide a yoke 5 4 extending downwardly from said segment and adapted to be operated by the operators knee in either direction. \Vhen the yoke is moved laterally on its pivot .32 in either direction from the mid or normal position. a corresponding shortening of the stitch will be produced as to one of the independent stitch forming mechanisms as above set forth. and when the yoke 54 is returned to its normal position, both of the feed bars will move together and to the same extent, causing the cloth to be fed in a straight line.

As a part of the stitch forming mechanism I show a needle bar 55 (Figures 1. 2 and 6) to which are secured the spaced needles 56. A presser foot 57 is secured to the presser bar 58 and is operated in the usual way in connection with the feed dogs 23. the needles 56 operating through the bottom of the presser foot. As herein shown. the front portion of the foot constitutes the guide 59 over and along which lace, insertion or binding tape may be fed into connection with the cloth and there stitched during the operation of the needle mechanism. Said auxiliary fabric will be referred to hereinafter for convenience of description as lace. but by such term I may cover any fabric which may be employed in this connection. The lace is fed from said guide 59 through a slot 60 (Figure T) in the bottom of the presser foot. and the needles also operate preferably through the ends of said slot. Any suitable means may be employed to cause the movement of the lace at a speed substantially equal to that of the maximum speed of the cloth due to the operation of the feeding devices above described. For this purpose I show a vertical reciprocating bar ()1 guided along the head casing parallel to the needle bar 55. The upper end of the said bar has a pin and slot connection with a bracket 62 secured rigidly upon the inner surface of the de tachable face plate 63 of the head, and to said bar is connected a stud (i4 engaged by a fork 65 pivoted at 66 upon a. fixed bracket 67. The opposite end of the forked member 65 is operated. as indicated herein, by means of the thread take-up mechanism 68 and in a uniform manner. The bar 61. therefore, is given short vertical reciprocations sin'iultancously with the comparatively longer vertical reciprowitions of the needle bar. To the lower end of the b'ar 61 is pivotally connected a lace feeding blade 6!) (Figures 9 and 10), the pivot T0 of this connection extending preferably at both of its ends beyond the parts so conne ted. The said lower end of the bar til operates within the front portion of the presser foot adjacent parallel vertical side flanges Tl thereof. Said flanges are provided with oppositely arranged vertical slots Tl through which the ends of the pivot Tl) extend. A spring T2 is shown surrounding the pivot Tl) and operates upon both of the parts (31 and (i9, tending to cause the blade 6'.) to approach the plane of the bar til. The lower edge (39 of the blade is adapted. however. to glide laterally of the vertical plane of the bar til along the inner face of the guide 55!. The upper portion of the blade 69 is formed into a tongue T3 which, cooperating with an adjustable stop T4, determines the extent. of forward swinging movement of the blade edge 69 toward the vertical plane above mentioned. The bar (31 having uniform vertical reciprocations and having the pivot Til arranged at a definite relation to the blade (39, the edge 69 of said blade will always move rearwardly along the guide to the same extreme position. By varying. however. the extent of movement of the blade forwardly due to the action of the spring T2. the effective feeding st rol-1c thereof is correspondingly varied. The stop Tl is adjustable vertically along the front face of the bar (31 by means of one or more set s rews T5 tilted into tapped holes T5. Under ordinary conditions of use. the extent of movement of the blade 69 and the feed of the lace thereby will be timed according to the maximum feed of the cloth and the stop T4. when once ad justed for this purpose. will ordinarily not be subject to further adjustment. It will be noted. therefore. that in applying lace to cloth. while the loth is being subjected to the action of the differential feeding mechanism for the several stitch forming devices in the manner already described, the action of the lace feeding devices will continue at uniform speed. \Vhile sewing in a curve as a result of the retardation of one of the feeding devices as above described. the lace will be applied 'at its full or normal length along the row of stitches indicating;- or representing the curve having the longer radius. but the opposite edge of the lat e. due to the action of the feeding blade (it), will be gatln ered and applied in its gathered t'orm along; the stitches representing the curve having the shorter radius without any special attention from the operator beyond the control of the diti'ereutial 'l'eediug devices al ready describedv Associated with the stitch forming mechanism and the lace i'eedlng devices and operating in unison therewith, l en'iploy a peculiar form of cutting means for cutting out the cloth below the lace and l'ietwecn the parallel rows of stitches. As herein shown. said cutting mechanisi'n includes a pair of fixed blades 76 (Figures 1;} and 14), each having a heel 76 Fitted into a socket 77 ot' the throat plate 25 and also having a log 78 for detachable screw connection at T9 with said plate. These blades 7th there fore, may be replaced or resharpened when they become dull without the necessity of discarding the throat plate as a whole. Another pair of cutting members 80 (Figures t. 7. 8) are carried by the presser foot and herein shown as pivoted thereto at 81. These members cooperate respectively with the aforesaid fixed members 70. the cutting portions thereof being adopted to oscillate around the pivots 81 and eoactinp with the fixed members at that moment when the cloth is stationary. When the cloth is fed rearwardly. however, the members 80 are so swung on their pivots as to lift the cutting portions out of cutting" action sirmiltianeously with the cil'ective movement of both the cloth feeding and the lace feeding devices as indicated in Figure 9. The means I show herein for operating the movable members oi the. cutting devices includes a bail 82 havingits rear portion pivoted at 83 to the presser foot, and having the front ends of the members 80 extending through or above a cross member 82 in trout of the guide 59. The bail 82 is oscillattal around its pivot 83 by means of the extended ends of the pivot rod above described. said ends extending through slots 82 of the bail in proximity to the vertical slots 71'. Since the bar (31 and the pivot 70 at the lower end of the same are guided for vertical reciprocation in the same plane, the action of the extended ends of the pivot rods 70 in the slots 82 will insure the swinging of the bail around the pivot 83 and hence the oscillation of the cutting: members 80. The frontends of said members R0 are sufliciently long to compensate for the sliding movement of the cross bar 82 with respect thereto. It will be noted, therefore, that the cloth will be out out between the rows of stitches close to both of said rows automatically and simultaneously with the application of the lace to the cloth whether operating in a straight line or in a'curve.

The lace feeding blade 69 is preferably provided with an opening 69 through which a tool may be inserted for the purpose of facilitating the starting of the lace or positioning it with respect to the line of work. liilzewise the lace guide 59 is formed with an opening 59" through which a screw driver may be passed to adjust one of the screws 75.

By referring to Figure 15, it will be observed that as a means for connecting the principal joints, especially with respect to those parts which are closely associated, 1 provide a compound pivot comprising two parts 84 and 85 constituting male and female screws and each having a shoulder adapted to cooperate with one of the parts being connected. The screw 85 has a smooth exterior surface constituting the bearing of the joint, and the end of this screw opposite its shoulder is adapted to impinge against the shoulder otthe screw 84' to limit the. space between said shoulders whereby the binding of the parts of the joint upon each other is prevented. it will be noted that a joint connection of this character is especially adapted t'or use in machinery of the class herein set forth wherein there are many closely associated relatively movable parts jointed together for the reason that not only may the joints be readily connected in assembling the machine, but there is no part projectinp nee yond the operating parts tending to inte t'cre with the smooth operation of the machine. Since the shoulder of the screw 8% binds upon the inner or smaller end ot the screw 85. said joint connection may be made positive and secure without binding the joint parts proper.

The differential feed mechanism disclosed in this application is not claimed herein. but in another application filed by me of even date herewith, Serial No. 127.323 patented August 28, 1923. #Lltithlt'fl.

Having thus described my invention. I claim as new and desire to secure. by Letters Patent:

1. In a machine of the class described the combination with the driving and stitch forming mechanisms including a presser foot, of cloth teeding devices cooperating with and below said foot. and means for teeding lace along said foot. said feeding means comprising a bar, connections between the bar and driving mechanism to reciprocate the bar vertically. a blade pivoted to the lower end of said bar and movlit) able over a portion of said foot and cooperating therewith, and a spring cooperating with the blade and the bar tending to extend the blade into alignment with the bar.

2. In a machine of the class described, the combination with the driving and stitch forming mechanisms includii'ig a presser foot having an opening therethrough, of cloth feeding devices cooperating with and below said foot, and means for feeding lace through said foot opening, said feeding means comprising a reciprocating bar, connections between said bar and said driving mechanism, a blade connected to said bar and movable over a portion of said foot and cooperating therewith. and means adjustable along the reciprocating bar and c0- acting with the blade to vary the extent of movement of the blade independently of the extent of reciprocation of the bar.

3. In a two needle sewing machine, the combination of mechanism for forming two parallel rows of stitches simultaneously, cloth feeding devices associated with the stitch forming mechanism, means to apply lace to the cloth while in motion along the stitch forming mechanism, and a plurality of spaced cutting devices serving to automaticall v cut out that portion of the cloth between the rows of stitches below the lace while the stitching is being performed.

4. In a machine of the class set forth, the combination of a two-needle stitch forming mechanism. cloth feeding devices associated with the several stitch forming devices, and means to opeate said feeding devices indeendently of each other. whereby the sew mg may be performed in a curve, means to apply lace to the cloth while being stitched, and means to automatically cut out that portion of the cloth between the rows of stitches simultaneously with the forming of the stitches.

5. In a two-needle sewing machine, the combination with the driving and stitch forming mechanism including a presser foot. and a throat plate. of inde endentl v movable cloth feeding devices associated with the several stitch forming devices. means to cause one of the loth feeding devices to feed faster than the other so that the cloth will be turned in a curve. lace applying means associated with said presser foot so that the lace follows the movement of the cloth. and means to cut out the cloth below the lace and between the rows of stitches, said cutting means including cooperating blades carried by the throat plate and presser foot respectively.

6. In a device for sewing lace on cloth, the combination with the driving and stitch forming mechanisms. of independently movable cloth feeding devices associated with the stitch forming mechanism, means to operate one of said cloth feeding devices faster than the other to cause the cloth to be fed in a curve. and means to appl lace to the cloth while in motion, said lace a 'iplying means including devices to cause the lace to be fed at a rate equal to the maximum feed of the cloth feeding device and to gather the lace along the edge corresponding to the curve having the shorter radius.

7. In a two-needle sewing machine, the combination with the driving, stitch forming and cloth feeding mechanisms including a throat plate and a presser foot above the same, means to apply lace to the cloth while the stitches are being formed, and means to cut out the cloth between the two rows of stitches, said cloth cutting means including a pair of blades tixed in a stationary position to the throat plate and a pair of blade cooperating therewith respectively and asso ciated with the presser foot for movement; therewith.

8. In a two-needle sewing machine, the combination with the stitch forming and cloth feeding mechanisms including a presser foot and a fixed throat plate, of lace feeding devices associated with the presser foot, and cloth cutting devices operated below the lace and comprising a pair of blades fixed to the throat plate and a pair of blades cooperating respectively therewith and pivoted to the presser foot, the lace feeding devices including means to oscillate the latter i'nentioned cutting blades.

9. In trimming mechanism for sewing machines, the combination with driving. stitch forming and feeding mechanisms including a throat plate and a presser foot above the same, of means to apply lace to the cloth while the stitches are being formed, said lace applying means including a reciprocating member acting upon the lace, and means to trim the cloth below the lace and along the line of the stitches, said cloth trimming means including a fixed blade secured to the throat plate and a pivoted blade coacting therewith and actuated by said reciprocating bar.

10. In a sewing machine, the combination with driving and stitch forming mechanisms. of feeding mechanism including a presser foot for operating upon the fabric being stitched. lace applying devices cooperating with said presser foot for directing lace to the fabric and causing it to be stitched thereto during the operation of said stitching mechanism. said lace directing means including a guide constituting a portion of said presser foot and over which the lace is fed, there being provided an opening between the guide and the other part of the presser foot. through which the lace passes, a reciprocating feeding bar above said guide, means to cause said feeding bar to reciprocate in a vertical plane, a lace engaging blade pivoted to said feeding bar and moving laterally around its pivot from said vertical plane, and means to vary the extent of lateral movement of the blade independently of the movement of the feeding bar.

11. in a lace api'ilying mechanism for sewing machines. the combination with stitching and feeding mechanisms for the fabric, said feeding mechanism including a presser foot having an opening through its bottom. means to direct lace downwardly through said opening. into position to be stitched to the fabric. a reciprocating bar for feeding the lace. means to cause said bar to reciprocate above the lace in a certain plane, a lace engaging blade being pivotally connected to the lower end of said bar and movable laterally at the lace engaging end toward and from said plane. and means to vary the extent of lateral movement of said blade independently of the extent of movement of the reciprocating bar.

12. In trinuning mechanism for sewing machines, the combination of stitching and feeding mechanisms for acting upon the fabric. said mechanisms including a presser foot having an opening in its bottom, means to apply trimming to the fabric and stitching it thereto simultaneously with the operation of said stitching mechanism. said trin'nning applying devices including a guide leading to said opening, a reciprocating bar acting above said guide. means coope "ating with the presser foot serving to c nfine the reciprocations of said bar in a certain plane. a trimming engaging blade carried by said bar and causing the trim ming to be fed through the opening at the same rate of speed as the first mentioned feeding devices are operated. and cloth cut ting means operative below the trimming. said cutting means including a movable blade and a bail operated by the reciprocations of said bar and engaging one portion of said blade.

13. A sewing machine having two adjacent needles. two adjacent cutters. both arranged to operate in advance of the needles. and between their lines of action to remove a strip of material between the lines of two adjacent seams. and a lace guide arranged to direct lace into the path of said needles. s id guide extending laterally beyond each of the cutters so as to accommodate lace ot' a width greater than the lateral spacing of the cutters, said lace adapted to be attached to the spaced edges of the material by the action of said needles.

14. In a sewing machine. two adjacent re ciproaiting needles arranged laterally of each other with respect to the line of feed, a presser foot. and two adjacent cloth-cutters both carried by said presser foot movably and spaced laterally from each other a distance smaller than the lateral s acin of the needles, said eloth'cutters operating between the lines of operation of the two adjacent needles.

15.111 a machine of the character set forth, a reciprocating member, a blade pivoted to said member. a spring tending to throw said blade into a plane parallel to the path of reciprocation, a stop for limiting the movement imparted to said blade by said spring. and a guide inclined to the direction of reciprocation of said member and located in the path of said blade and cooperating therewith to cause the lace or other material to be fed over said guide, said blade having swinging movement during reciproation of said bar and as it engages said guide.

16. in a machine of the character set forth. a reciprocating member. a blade pivoted to said member. a spring tending to throw said blade into a plane parallel to the path of reciprocation, a stop for limiting the movement imparted to said blade by said spring. said stop being adjustable to vary the extreme position which the blade will take under the influence of said spring. and a guide located in the path of said blade and cooperating therewith to cause lace or other material to be fed over said guide.

17. in a machine of the character set forth. a presser foot having a guide, a feeding member arranged to reciprocate above said guide and cooperating therewith. and a trinnuing knife mo ably mounted on the prcsser foot below said guide and operatively connected with said feeding member.

id. in a H'ltlOltillP ot' the character set forth. a presser foot having a guide. a feeding member arranged to reciprocate above said guide and cooperating therewith. and a trimming knife movably mounted on the presser foot below said guide.

l9. In a u'mchine of the character set forth. a presser foot having a guide. a feed ing member arranged to reciprocate above said guide and cooperating therewith. a trimming knife pivoted to the presser foot below said guide. and a connecting member piioted to the presser foot and having operative ei'igagement both with the rcciproeating member and with said linifc.

Q l. in a sewing machine having a bed plate. a presser foot. and a pair of cloth cutters carried by said presser foot and mew able thereon. stationary cutter means on said bed plate adapted to cooperate with said movable cloth cutters. and a single operating member for said pair of movable cloth cutters.

in a machine of the character set forth. a presser foot having a guide and flanges extending upwardly at each side of said guide. feeding means arranged to move over said guide l'ietween said flanges. a bail pivoted to the presser foot and embracing the flanges thereof. an operative connection loo between said bail and the feeding means, and a knife operated by the movement of said bail.

22. In a sewing machine having a bed plate, a presser foot, a pair of cloth cutters carried by said presser foot and movable thereon, in a plane, extending lengthwise of the line of feed, stationary cutter means on said bed plate adapted to cooperate with said movable cloth cutters, and a single operating member for said pair of movable cloth cutters.

23. In a lace sewing machine a prcsscr foot. stitching mechanism, cloth-feeding mechanism beneath said presser foot, a cloth cutter in front of said stitching mechanism. means above said presser foot for feeding lacc to the cloth, and an operating connec tion extending from said lace feeding means to said cloth cutter.

24. In a sewing machine, a guide, a bar arranged to reciprocate up and down relatively to said guide, a blade connected with said bar movably to swing forward and rearward relatively thereto, said blade bcim, adapted for cooperation with said guide to feed material rearwardly over said guide. and a stop on said bar for limiting the forward swinging movement of said blade.

25. A feeding mechanism for sewing machines. comprising means for feeding material. and means for feeding auxiliary material to said other material. said means comprising a guide block. a pivoted feed member disposed above said guide block. and a reciprocating incn'ibcr adapted to impart movement to said feeding men'ibcr to move the said feeding member upwardly and downwardly with respect to said guide block. said feeding member being in engagement with the guide block (luring downward movement, and out of engagcmeut with the guide block during upward movement.

26. Tu a two needle sewing machine, the combination with the driving. stitch forming and cloth feeding mechanism including a throat plate and a. presser foot above the same. means for feeding lace to apply it to the cloth while the stitches are being formed. means to cut out the cloth between the two rows of stitches, and means operated by the lace feeding means for actuating the cutting means during the interval between the fced movements of the lace feeding member.

2?. in a. two needle sewing nurhinc. the combination with the driving, stitch forming and cloth feeding mechanism including a throat plate and a presser foot above the same. means mounted on the presser foot for feeding lace to apply it to the cloth while the stitches are being formed, means to cut out the cloth between the rows of stitches, and means operated by the lace feeding means for a tuating the cutting means during the interval between the movements of the lace feeding member.

In a two needle sewing machine, the combination with the driving. stitch forming and cloth feeding mechanism. including a throat plate and a presser foot above the same. means to cut out the cloth between the tv. o rows of stitches, and means operated by the downward movement of the lace feeding means for actuating the, cutting means during the interval between the mov ments of the lace feeding member.

21 in a machine of the class set forth, the combination of a two needle stitch forming mechanism. cloth teeding devices, means for feeding lace to apply it to the cloth while being stitched. and means for automatically cutting out that portion of the cloth between the row: of stitches f-iinuiltaneously with the forming of the stitches and while the lace is at rest bctu'ccn the feed movements of the machine.

3". in a maciiine of the character described. 21 prcsscr foot. two needles arranged laterally of each other with respect to the line of feed of the work. two cloth cutting members pivotally carried by the presser foot on the inside of the needles. and means for throwing the cutting members into op eration during the interval between the feed movements of lace feeding member.

ill. in a machine of the character described. a p e scr toot. two needles arranged laterally of each other with respect to the line of feed of the work. lace feeding means carried by the prcsser foot. a pivoted member carried by the presscr foot. knives can ricd by the pivoted me nber on the inside of the rows of stitching. and means operated y the lace feeding means for swinging the pivoted member to throw the knives out of operation during the interval between the feed movements of the lace feeding member.

In a machine of the character described. a. prcssr-r foot. two needles arranged laterally ot' cach other with respect to the line of feed of the work. lace feeding means carried by the lilt'SFOl foot. a pivoted mem- -3 1 by the prcsser foot. pivoted knives carried by the pivoted member on the dc of the rows of stitch ng. and means operated by the la e feeding in ans for swinging the. pivoted member and swinging the knives on their pivots to throw the knives out of operation during the interval between the feed movement of the lace feeding member.

IV. In a machine of the character described. a p 'csser foot. two needles arranged laterally of each other with respect to the line of feed of the work. lace feeding means carried by the prcsser foot. ears carried by the presser foot. a yoke. pivoted between said ears, knives pivoted to said yoke on the inside of the rows of stitches, and a connection between the hire feeding means and the yoke for moving the yoke down and rocking the knives on their pivots for throwing them into operation during the interval between the movements of the lace feeding member.

In testimony, that I claim the foregoing as my invention. I have signed my name in presence of two subscribing Witnesses.

RALPH M. SHARAF.

\Vitnesses D. LEWis MATTERN, Mon M. \Vnmnnna.

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