US2405871A - Sewing machine - Google Patents

Description

13, 1946- .5. w. AVIS I 7 2 4 SEWiNG MACHINE I Filed ma 21, 1943 5 Sheets-Sheet 1 IQ EN-FEIR: waywa- M-w.w. 'I r y Aug. 13, $9.46. is. w. AVIS SEWING MACHINE 5 sheets-sheet 2 7 Filed May 21, 1945 INy N-HJR AugQlB, 194. sl W/AVIS I SEWING MACHINE Filed May 21; 1945 5 Shee ts-Sheet 5 9 1946- s. w. AVIS 2,465,873

' SEWING MACHINE- Filed May 21, 1943 v s Sheets-Sheet 4 Patented Aug. B, 1946 SEWING MACHINE Samuel W. Avis, deceased, late of Wellesley, Mass., by Harriette M. Avis, administratrix, .Wellesley, Mass, assignor to The Reece Corporation, a

corporation of Maine Application May 21, 1943, Serial No. 487,860

32 Claims.

This invention relates to sewing machines for automatically performing certain predetermined sewing operations, and especially, although not exclusively, to machines for sewing flat perforated buttons to fabrics, and has for its general object to provide a machine for automatically sewing groups of stitches, which machine, by simple adjustments, can be so set as to vary, within wide limits, the numbers of stitches in each group, the number of groups, and the relative positioning of the latter, the capacity of the machine for adjustment and variability in these respects being greater than that of any similar prior machine of which the-inventor is aware.

A machine, forexample, for sewing flat perforated buttons usually comprises stitch forming mechanism including "a needle and a cooperating looper or the equivalent, mechanism for relatively vibrating the needle and work to cause the needle to pass alternately through the several holes of a pair to form a group of a predetermined number of attaching stitches and thereafter to pass two or more times through the same hole to form a tying stitch to complete the group,

and, for the purpose of sewing a four hole button, mechanism for relatively shifting the stitch forming mechanism and work after the completion of a group of stitches through one pair of holes to cause the formation of a similar group through the other pair, together with means for completion of one or more groups. In prior machines of this type, the vibrating means has usually included a cam the shape of which determined the number of stitches in each group, that is to say, the number of attaching stitches formed before the completion of a group by a tying stitch, so that difierently shaped cams were necessary for different stitch groups, and possibility of variation in this respect was sharply limited excent by removing and replacing the cam. The

same has been true of the means for relatively shifting the stitch forming mechanism and the work to change the stitching position. In accordance with the present invention a machine is provided which, by a simple adjustment, will automatically sew a wide variety of stitch groups, each completed by a tying stitch, by the use of a single vibrating cam of fixed shape, and will cause relative shifting of the stitch forming mechanism and the work after the completion of stitch groups of a wide variety of number of stitches each. The particular machine hereinafter described is designed to be adjusted or set to sew automatically either one or two groups 01" six, eight, twelve, or sixteen stitches each, to

I be obvious, however, that this design can be modified to provide for a greater or smaller number of possible stitch groups of a greater or smaller number of stitches each.

The invention further relates to machines of the type wherein the vibrating movement to cause the needle to pass alternately through different holes in the button is imparted to the needle, as distinguished from the work, and wherein the under thread handling means comprises a rotary loop taker, and, in this connection, has for its object to provide mechanism whereby the proper cooperation of the under thread handling means with the needle in different lateral positions of the latter is insured. To this end the stitch forming mechanism comprises a needle, a rotary loop taker, and a loop deflector, together with means, operated by a single cam or the equivalent, for vibrating the needle, alternately advancing and retarding the loop taker, and operating the loop deflector, such unitary control making certain the proper relative timing of the several movements.

While the invention is particularly applicable t machines for ewin fiat erfo t d tt n, automatically stopping the machine after the 0 S g p m e bu O S certain features thereof may be employed to equal advantage in other sewing machines such, for example, as tacking machines and machines for attaching articles other than fiat buttons.

The invention will best be understood from the following description of a preferred embodiment thereof illustrated in the accompanying drawings, this, however having been chosen for purposes of exemplification merely, it being obvious that said invention, as defined by the claims hereunto appended, may be otherwise embodied without departure from the spirit and scope thereof.

In said drawings:

Fig. l is a substantially central, longitudinal, vertical section of the machine.

Fig. 2 is a vertical transverse section taken substantially on the line 22, Fig. 1.

Fig. 3 is a rear end elevation partly broken away and showing some of the parts in section taken substantially on the line 3-3 of Fig, 1.

Fig. 4 is a horizontal section taken substantially on the line 4-4, Fig. 1.

Fig. 5 is a fragmentary plan view of the Fig. 6 is a similar view of the looper advancing and retarding mechanism.

Fig. 7 is a similar view of a portion of the loop deflector operating mechanism.

F g. 8 is a fragmentary plan view, partly in section, and Fig. 9 a similar elevation of the stop mechanism for the needle vibrating cam and the controlling devices therefor.

Figs. 10 to are fragmentary plan views of the stop mechanism control, showing different adjustments.

Figs. 16 and 17 are simplified fragmentary plan views similar to Fig. 8, showing the stop-mechanism for the needle vibrating. cam in running and stopping position, respectively.

The machine herein shown is of the general type described in the Reece Patent No. 2,158,199, May 16, 1939, wherein the work is held stationary and all of the movements necessary in sewing a two-hole or a four-hole button are imparted to the stitch-forming instrumentalities.

The frame of the machine comprises an upright hollow casing zllhaving at the bottom aforwardly projecting hollow horn 2l and at the top an overhanging hollow head 22. The said frame or casing, together with certain minor attached parts, is such as to afford the necessary enclosures, supports, bearings, etc, for the various moving parts.

The horn 2| carries a work plateztupon which the fabric to which the buttons are to be attached is supported and against which it is clamped by a presser foot having associated therewith a button clamp 24 for holding the individual buttons and positioning them for the operation of the sewing instrumentalities. Said presser foot and button clamp are carried by a spring pressed presser foot bar '25 arranged and operated in any suitable manner, for example, as shown in the Reece patent above referred to.

The main driving ins'trumentalities. include a main or needle shaft 2'5 journalled in bearings in the upper part of the casing 2G and head 22, a vertical cam shaft 2! driven through beveled gears 28 and 28a from the shaft 26, and a looper shaft 3! journalled in hearings in the bottom of the casing, extending into the hollow horn 2i, and driven through beveled gears 39 and 36a and other gearing hereinafter described from the cam shaft 2?. Power is applied to the main shaft through a belt pulley 36 and a suitable clutch and stop mechanism 3? controlled by a stop arm 38 on a rock shaft 39 in such a manner that when said stop arm is in the position shown in Fig. l the pulley 36 is disconnected from the shaft 23 and the machine is at rest, and when said stop arm is swung to the left (as viewed in said figure) the pulley is connected with said shaft to rotate the latter. Said stop mechanism may be of any suitable type such, for example, as that described in the above mentioned Reece patent, or as hereinafter described in connection with the stop mechanism for the needle vibrating means. The rock shaft 39 is provided with an arm 48' connected by a link M with an arm &2 on a second rock shaft 43 provided at the outside of the casing with an arm A l (Figs. 3 and 4) which may be connected with a suitable starting treadle (not shown), whereby the stop arm 38 may be moved into running position to start the machine, said arm being restored to the stopping position shown by automatic controlling mechanism hereinafter described. The stop arm is yieldingly held in either of the above positions by a spring pressed positioning plunger 65 (Fig. 4) carried by the arm 44 and engageable with recesses 6 in the frame, only one of said recesses being shown.

The stitch-forming instrumentalities comprise a longitudinally reciprocating needle 45 carried by a needle bar ll, a rotary looper 48 carried by the looper shaft 3|, and an oscillatory loop defiector 49 carried by a rock shaft 50. The looper 43 may be of any usual form but as shown is of the ring type described in the Kohler and Lachman Patent No. 393,766, December 4, 1888, and supported and driven by devices such as those shown in the Bolton Patent 376,364, January 10, 1888. The needle bar 51 is reciprocated from the shaft 26 through suitable connections, generally indicated at 5!, which may be of any conventional type but which as herein shown are of the character described in the Reece Patent No. 2,193,344, March 12, 1949.

In the operation of the machine, the needle 46 is laterally vibrated between successive longitudinal reciprocations thereof to cause the same to pass alternately through the two holes of a pair in. the button, the loop deflector 59 being simultaneously oscillated and the looper Q8 alternately advanced and retarded in its rotation to cause said looper to properly enter the thread loops formed-by the needle in the several lateral positions of the latter. These movements are suspended at predetermined times to cause the needle to pass twice through the same hole to form a tying stitch. In addition, in sewing a fourhol'ebutton, the stitch-forming instrumentalities (i. e., needle, looper, and loop deflector) are periodically shifted in a direction transverse to the direction of lateral vibration of the needle to cause them to sew stitches in different pairs of holes. To the latter end the shafts 26, 31 and '56 are all. axially movable, having splined connections with the axially immovable power transmittingelements in driving relation therewith, ineluding the driven member. of the main clutch and. stop mechanism 31. The rock shaft 50 is caused to move axially in unison with the looper shaft 3| by means of collars 52 and 53 fixed to said rock shaft and embracing the looper-carrying. head 54 on the looper shaft.

The mounting of the needle bar 47 whereby the needle is given its vibrating and shifting movements is generally similar to that described in the Avis Patent No. 2,186,228, January 9, 1940. Said needle bar is guided in upper and lower arms ofa yoke El formed on a sleeve E2 loose on the shaft 25 but held for axial movement therewith between a collar 63 and the crank disk 8d of the driving connections 5!, which collar and disk are fast on said shaft. The-yoke Bl carries a pin or stud 65 embraced by th forkedlower end of a stud 65 carried by a lever 6'1 fulcrumed on the cam shaft 21. The lever 61 (Figs. 1, 4, 5, 6, and 7.) is formed with a longitudinal slot 68 which receives a block 69 pivoted on a stud H3 having a head 'H adjustable in away 12 formed in a lever "I3 fulcrumed at M in the frame. By adjusting the head H in the way 12 the amplitude of movement imparted by the lever 13 to the lever 61., and by the latter to the yoke 5|, can be varied. The lever 13 has an arm '14 carrying a cam follower 15 which engages a cam groove Win a cam l! on the cam shaft 21. The cam groove Hihas two radially offset portions of equal length, and the ratio of the gears 28, 28a and 30, 30a issuch that the cam shaft 21 is rotated at one-half the-speed of the shafts 26 and 3!. Consequently the yoke ill will be rocked and the needle bar 4'! moved laterally alternately in oppothe frame.

site directions after each longitudinal reciprocation of said needle bar.

The mechanism for rotating the looper shaft 3I is shown in Figs. 1 to 4 and 6. The beveled gear is carried by or formed integral with one end of a sleeve 83 loose on said shaft and rotatable in bearings 31 by which it is held against axial movement. Secured to the opposite end of the sleeve 86 is a spiral gear 83 which meshes with a spiral gear 99 splined on a countershaft 93 for movement longitudinally thereof, said countershaft being journalled in suitable bearings in Fixed to the countershaft 96 is a spur gear 9I which meshes with a spur gear 92 fast on the looper shaft 3|. By the foregoing connections the looper shaft 3I is continuously rotated, while, by moving the spiral gear 89 axially of the countershaft 9D, the angular position of the looper 48 with respect to that of the looper shaft may be advanced or retarded, as more fully explained in the Avis Patent No. 2,250,696, July 29, 1941.

Referring to Figs. 1, 4, 6 and 7, the stud 55 carries at its upper end a pivoted block 98 embraced by the forked end of a lever 99 pivoted at I06 to the frame, and the other arm of which is likewise formed with a forked end embracing a block IEII pivoted on a stud I62 carried by an arm I03 on a vertical rocking sleeve I64 (see also Figs. 1 and 2) carried by an upright rod I5 suitably secured in the frame. At its lower end the sleeve I04 has an arm I65 the forked end of which embraces a stud I96 carried by one end of a link I61 suitably guided in the frame for longitudinal movement. The link I01 carries a fork I99 engaging a groove in the hub of the spiral gear 89, whereby the latter is moved axially of the countershaft 90 to advance or retard the looper as above explained. The rocking sleeve I65 is provided adjacent its lower end with a second arm H6 (Fig. 7) connected by a link I I1 (see also Fig. 1) with a bifurcated arm II8 on a hub II9 splined to the rock shaft 50, whereby said rock shaft and the loop deflector 49 are oscillated. It will be observed that the lateral vibration of the needle, the advance and retardation of the looper, and the oscillation of the loop deflector are all produced by the single cam 1.1, and that the amplitude of these movements is simultaneously varied by th adjustment of the single stud 16, thereby insuring the proper coordination of these movements.

Referring to Figs. 2 to 4 the shafts 26 and 3! are moved axially to shift the stitch-forming devices for the purpose of causing the latter to place stitches in different pairs of holes in a button by means of a cam I26 journalled in bearings in a boss I21 on the wall of the casing and driven, as hereinafter more fully described, from a worm I28 (see also Fig. 1) formed on a sleeve secured to or integral with the beveled gear 28. The cam I25 is formed on its periphery with two cam grooves I29 and I36 shaped respectively to produce shifting movements after a 90 or a 180 movement of said cam. Cooperating with the grooves I 29 and I33 are alternatively operative cam follower pins I3! and I32 carried by a lever I33 fulcrumed at I35 in the machine frame. The cam follower pins I3I and I32 are so interconnected, as described, for example, in the Avis Patent No. 2, 58,171, May 16, 1939, that when one of said pins is engaged with its groove the other will be disengaged, and vice versa, and for convenience of operation one of said pins may be provided with an operating handle I35 (Figs. 1

and 4) accessible from the exterior of the casing. The lever I33 has an arm I36 formed with an arcuate groove I31 in which is adjustably mounted a stud I38. By adjusting said stud in said groove the amplitude of the movement imparted to parts connected by said stud with the lever I33 can be varied in accordance with the spacing of the pairs of holes in the button, and the groove I31 is of such length that the stud I38 can be moved into a position coaxial with the fulcrum I34, so that no movement will be imparted to said stud, as in sewing a two-hole button. For convenience in so adjusting the stud I38 it is embraced by the forked upper end of one arm of a bell crank lever I39 pivoted at I40 in the wall of the casing and having at the exterior of the latter an arm I II carrying a latch I42 adapted to coact with a notched segment I43.

Connected with the stud I38 is the upper end of a link I56 connected at its lower end, by a universal joint I5I, with a vertically disposed link I52. At its upper end the link I52 is connected with an arm I53 on a rock shaft I54 journalled in the frame and having thereon a pair of arms I55 carrying at their ends studs I56 engaging a groove I51 in a collar I58 secured to the shaft 25. At its lower end the link I52 is connected with an arm I59 on a rock shaft I66 journalled in the frame and having thereon a pair of arms I6I carrying at their ends studs I62 engaging a groove I63 in a collar I64 secured to the shaft 3|.

As above pointed out, each complete rotation of the cam 11 produces one complete lateral vibration of the needle and the corresponding movements of the looper and loop deflector, so that, by interrupting the rotation of said cam during two or more longitudinal reciprocations of the needle, said needle can be caused to pass a plurality of times through the same hole to form a tying stitch, and by varying the time of such interruption the number of attaching stitches formed in a group completed by a tying stitch can be varied at will without any change in the shape of the groove 16 in said cam. To this end, referring to Figs. 1, 8, 9, 16 and 17, the cam 11 is carried by a sleeve I13 loose on the shaft 21 and adapted to be connected for rotation therewith by a clutch and stop mechanism generally indicated at HI and controlled by a stop arm I12. The stop mechanism I1I may be of any suitable type but as shown most clearly in Figs. 8, 16 and 1'1 comprises a driving disk I13 secured to the shaft 21 and having an annular flange I14 formed with a notch I15 toreceive a latch or dog I16 pivoted to a driven disk I11 carried by the sleeve I16, said latch being normally urged in the direction to engage said notch by a. spring pressed plunger I19. Cooperating with the latch I16 is a laterally extending finger I19 mounted in a socket I carried by the stop arm I12, said finger having a limited resilient yielding movement in said socket against the pressure of a spring I8I. When the stop arm is in the position shown in Figs. 8 and 16, and in full lines in Fig. 9, the latch I16 is free to engage the notch I15, and the cam 11 is connected with the shaft 21 for rotation therewith. When the stop arm I12 is in the position shown in Figs. 1 and 17 and in broken lines in Fig. 9, the finger I19 is located in the path of movement of the latch I16, and, as the shaft 21 rotates in the direction of the arrow on Figs. 8, 16 and 17, engagement of the latch I16 with the finger I19 causes said latch to be disengaged from the notch I15, thereby 7 disconnecting the cam l I from the shaft 2-! and positively stopping said cam, as shown in Fig. 17, the stopping impact being cushioned by the yielding of said finger, and the recoil being checked to bring the cam :to rest in a predetermined angular position by the engagement of a spring controlled dog I82 carried by said finger with a lug I83 on the disk III, as shown in broken lines in Fig. 17. The stop arm H2 is keyed to a rock shaft I86 and formed with an extension l8! connected at its upper end to the frame by a sprin I88 (Fig. 1) tending normally to hold the same against a stop and consequently to hold the stop arm in the running position shown in full lines in Fig. 9, said stop arm being periodically moved into the stopping position by automatic controlling mechanism hereinafter described.

Referring particularly to Fig. 2, disposed coaxially within the hub of the cam I26 is a controller shaft I89 which is axially slidable into a plurality of longitudinal positions determined by engagement of a spring-pressed positioning plunger I90 carried by the cam with a series of cavities I9I formed in the shaft. As shown, there are six cavities I9I, providing for six lon itudinal positions of the shaft I89. The shaft I89 carries a key I 92 adapted to connect the same with the cam I29 for rotation in unison therewith, said key being of sufficient length and being sodisposed as to maintain the connection in all longitudinal positions of said shaft. Rotatably mounted on the shaft I89fland in bearings I93 in a frame member I94 is a worm gear I95 which meshes with the worm I28. 'The shaft I89 carries a second key I95 adapted, when the shaft is in its inner positions, to connect the same with the worm gear I95 for rotation in unison therewith. Secured to or formed integral with the hub of the gear I95 is a spur gear I91 which meshes with a spur gear I98 rotatable on a stud shaft I99 carried by the frame member I94. Connected with the gear I98 for rotation in unison therewith is a second spur gear 265 which meshes with a spur gear 28! loose on the shaft I89 but adapted to'be connected therewith by the key I92 when the shaft is in its outer positions. The gears I91, I98, 298 and ZGI constitute reduction gearing, and the arrangement is such that when the shaft I89 is in certain of its inner positions (in the present instance, three positions), said shaft will be directly connected by th key I86 with the gear I 95 and will, together with the cam I26, rotate in unison therewith, and when said shaft is in certain of its outer positions (in the present instance, likewise three positions), the key I95 will be disengaged from the gear I95 and the key I92 engaged with the gear 2M, whereupon said shaft and cam will be rotated at a reduced speed. The machine herein shownis so designed that when the shaft we is directly connected with the gear I95 said shaft will make one complete rotation during twenty-four reciprooations of the needle bar, and when driven through the reducing gearing it will make one complete rotation during thirty-two reciprocations.

Secured to or formed integral with the outer end of the shaft I8!) is a controller disk EIIl having associated therewith a handle 2II- whereby said shaft can be conveniently adjusted into its several longitudinal positions. Disposed about the periphery of the controller disk 2H! at intervals of 90 (see alsoFigs. l and 4) are four bevelled stop elements or projections 2J2. Said stop elements, as shown most clearly in Fig. 4, are

8 of difierent lengths axiallyof the disk, one of said elements, designated A in Fig.4, being of a length substantially equal to the width of the disk, another B diametrically opposite A being of a length substantially equal to two-thirds of the width of the disk, and the others C being of a length substantially equal to one-third of the width of the disk. These differently proportioned stop elements constitute, in effect, three axially spaced circumferential sets of stop elements of a different number each, as diagram matically illustrated in Fig. 10 at a, b and c, the set a comprising only one stop'element, the set b comprising two stop elements spaced 180, and the set 0 comprising four stop elements spaced at Secured to the rock shaft 39 of the stop arm 38 of the main stop mechanism 31 is a stop dog 216 adapted to cooperate with the stop elements 2I2 in such a manner that, when the controller .259 is rotated in the direction of the arrow in Fig. l, engagement of a stop element with said dog will force the latter toward the right and move the stop arm 38 into stopping position, as shown in said figure. The stop dog 2I8 is bifurcated to provide two operative portions w, :1: (Figs. 4- and 12) alternatively engageable with the stop elements M2, the spacing of such portions being such that only one will be engaged by any of the stop elements in any longitudinal adjustment of the shaft Hit and controller 259, as will be obvious from Figs. 10 to 15. Splined'on the shaft 86 for a limited longitudinal movement thereon into the inner and outer positions shown, for example, in Figs. 11 and 12, respectively, is a similar stop dog 25?, said dog being yieldingly retained in said positions by a spring pressed plunger 2E8 carried thereby with a pair of cavities 219 and 220 in the shaft 586, and being movable from one of said positions to the other by a spindle 122i journalled in the casing wall and having an eccentric pin 222 engaging a groove 223 in the dog, said spindle having at the exterior of the casing an operating handle 22% by which it can conveniently be turned. The stop dog 2H is likewise bifurcated to form operative portions y and 2 (Figs. 12 and 13) spaced similarly to the portions w and :1: of the dog 25% and adapted to be alternatively engaged by the stop element 2l2 to force the stop arm I12 for the vibrating means stop mechanism lII into stopping position against the tension of the spring ltd, as shown in Fig. l. The operative faces of the engaging portions 3 and z are of sufficient length to hold the stop mechanism disengaged for the period necessary to cause the needle to make two or more strokes in the formation of a tying stitch and inasmuch as the portion 2 is operative when the parts are adjusted to turn the cam I26 and controller 2H3 at a relatively slow speed, the face of said portion may be somewhat shorter than the face of the portion y. It will, of course, be understood that the arrangement is such that a stop element 2I2 will traverse the face of an engaging portion of the dog 2 I 1' before the dog 2 I 6 is moved far enoimh by a stop element to operate the main stop mechanism 37, as will be clear from Fig. 1, so that a tying stitch will be completed before the machine is stopped.

In Fig. 10, the shaft I89 and controller disk 2'? 9 are shown in their innermost position, in Fig. 15 in their outermost position, and in Figs. 11 to 14 inclusive in four intermediate positions. In the positions shown in Figs. 10, 1'1 and 12 the shaft I89 is directly connected with, the gear I95,

9 and in Figs. 13, 14 and 15 it is connected to be driven through the reduction gearing.

With the parts adjusted as shown in Fig. 10, (the dog 2|! being in its inner position) the stop element a is in a position to cooperate with the portion 10 of the main stop mechanism do ZIB, and the stop elements of the set b are in a position to cooperate with the portion y of the vibrating means stop mechainsm dog ZI'I. The machine will therefore stop after one complete rotation of the controller disk ZIG and cam I26, and stop mechanism I'I'I will be operated just prior to each 180 movement of said parts. Consequently, the machine will sew two groups of stitches of twelve stitches each, each group being completed by a tying stitch, and if the cam follower I32 is engaged with the cam groove I30, and the stud I38 properly adjusted in the groove IS! in accordance with the hole spacing, these two groups of stitches will be sewn through the two pairs of holes in a four-hole button.

With the parts adjusted as shown in Fig. 11, the stop elements of the set I) are in position to engage the portion w of the dog 2I6 and the stop elements of the set in position to engage the portion y of the dog 2 I I. The machine will therefore stop after a 180 movement of the controller disk 2m and cam I26, and the vibrating stop mechanism will be operated just prior to the completion of each movement of 90 of said parts. Consequently, the machine will sew two groups of sixstitches each, each group being completed by a tying stitch, and if the cam follower pin I3I is engaged with the cam groove I29 and the stud I38 properly adjusted in the groove I31, these two groups of stitches will be sewn through the two pairs of holes of a four-hole button.

When the controller disk is in the position shown in Fig. 12,. and the stop dog 2|! moved into its outer position as also shown in said figure, the portions and y of the dogs 2H5 and 211 will both be engaged by the stop elements of the set 0, and the machine will sew one group of six stitches completed by'a ty ing stitch and stop. Since only one group of stitches is sewn, as through one pair of holes in a two-hole button, the stud I38 will at this time be adjusted into a position coaxial with the fulcrum I34.

With the parts adjusted into the position shown in Fig. 13 (the stop dog 2I'I being returned to its inner position) the stop element a is in position to engage the portion at of the dog 2H5, the stop elements of the set I: are in a position to engage the portion 2 of the stop dog 2", and the shaft I89 is connected for the reduced speed drive. The machine will, therefore, sew two groups of stitches of sixteen stitches each, each group being completed by a tying stitch, and with the cam follower I32 and stud I38 adjusted as above described in connection with Fig. 10, these two groups of stitche will be sewn through the two pairs of holes in a four-hole button.

With the parts in the position shown in Fig. 14, the stop elements of the set b are in position to engage the portion at of the dog 2I6, and the stop elements of the set 0 in position to engage the portion 2 of the dog 2II. The machine will then sew two groups of stitches of eight stitches each, each group completed by a tying stitch, and

in Fig. 15, and the dog ZI'I again adjusted into its outer position, the stop elements of the set 0 will engage both the portion at of the dog 2H5 and the portion 2 of the dog 2 I1, and the machine will sew one group of eight stitches completed by a tying stitch, the stud I 38 being adjusted into the coaxial position above referred to in connection with Fig. 12.

In addition to the above adjustments, if the controller disk be in the position shown in Fig. 11, and the stop dog 2E1 moved into its outer position, the stop elements of the set 12 will be in a position to engage both the portion 10 of the dog 2% and the portion y of the dog 2H, so that the machine will sew one group of twelve stitches completed by a tying "stitch and stop, the stud I38 being at this time adjusted into its coaxial position. Similarly with the controller disk in the position shown in Fig. 14, and the dog 2 I 'I in its outer position, the machine will sew one group of sixteen stitches completed by a tying stitch. It will thus be seen that for sewing one group of stitches through one pair of holes of a two-hole button, the do v 2H is adjusted into its outer position and the stud I33 adjusted into a position coaxial with the fulcrum I34, whereas for sewing two groups of stitches through the two pairs of holes of a four-hole button, the stop dog 2 I1 is adjusted into its inner position and the stud I38 adjusted in the groove I at an appropriate distance from the fulcrum I34.

Other variations in the character of the work done are possible. For example, with the parts in the positions shown in Figs. 10, 11, 13 and 14, and the pin I38 moved into the coaxial position, the machine will sew, through the same pair of holes, two groups of stitches each completed by a tying stitch.

What is claimed is:

1. In a sewing machine having driving means and stitch forming mechanism including a, longitudinally reciprocating and laterally vibratory needle, a cooperating looper, and a. loop deflector, a common actuator and connections for vibrating said needle laterally and operating said loop deflector, and connections for operating said actuator from said driving means.

2. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating and laterally vibratory needle, a cooperating rotary looper, and a loop deflector, and a single cam and connections operated thereby for vibrating said needle laterally, angularly advancing and retarding said looper, and operating said loop deflector.

3. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said Work holding means and needle transversely of the latter, and means for automatically suspending the operation of said vibrating means including a controller and means for moving said controller at a variable speed with respect to the speed of reciprocation of said needle.

4. In a sewing machine, stitch formin mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, and means for automatically suspending the operation of said vibrating means including a controller adjustable to cause suspension after a variable movement thereof, and means for movin said controller at a variable speed with respect to the speed of reciprocation of said needle.

5. In a sewing machine. stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter in one direction, means for automatically suspending the operation of said vibrating means including a controller and means for moving said controller at a variable speed with respect to the speed of reciprocation of said needle, and means operatin at a constant speed with respect to the speed of movement of said controller for relatively shifting said work holding means and needle transversely of the latter in another direction.

6. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, a cam and connections for relatively Vibrating said work holding means and needle transversely of the latter, an actuator for said cam operated at a constant speed with respect to the speed of reciprocation of said needle, and automatic stop mechanism for disconnecting said cam from it actuator and stopping the same while the reciprocation of the needle continues.

'7. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, Work holding means, a cam and connections for relatively vibratin said work holding means and needle transversely of the latter, an actuator for said cam operated at a constant speed with respect to the speed of reciprocation of said needle, and automatic stop mechanism for disconnecting said cam from its actuator and stopping the same while the reciprocation of the needle continues, said stop mechanism being adjustable to stop said cam after a variable number of reciprocations of said needle.

,8. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, a cam and connections for relatively vibrating said work holding means .and needle transversely of the latter in one direction, a second cam and connections for relatively shifting said work holding means .and needle transversely of the latter in another direction, an actuator for said first namedcamoperated at a constant speed with respect to the speed of reciprocation of the needle, stop mechanism for disconnecting said first named cam from its actuator and stopping the same, a controller for said step mechanism, and means for operating said controller and second cam at a constant relative speed which is variable with respect to the speed of operation of said actuator.

9. In a. sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, means for reciprocating said needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, stop mechanism for stopping said vibrating means while the reciprocation of the needle continues, and a controller for said stop mechanism having a plurality of sets of difierently spaced stop elements, said controller being adjustable to render the several sets selectively operative to operate said stop mechanism.

10. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transverselyof the latter, stop mechanism for said vibrating means, a controller for said stop mechanism having a plurality of sets of difierent ly spaced stop elements, said controller being adjustable to render the several sets selectively operative to operate said stop mechanism, and means for moving said controller at a variable speed with respect to the speed of reciprocation of said needle.

11. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, stop mechanism for said vibrating means, a controller for said stop mechanism having a plurality of sets of differently spaced stop elements, and a stop dog for causing operation of said stop mechanism and having a plurality of operative portions engageable by said stop elements, said controller being adjustable to bring the several sets of stop elements into position to engage the several portions of said dog.

12. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, means for reciprocating said needle, work holding means, means for relatively vibrating said Work holding means and needle transversely of the latter, stop mechanism for stopping said vibrating means while the reciprocation of the needle continues, a controller for said stop mechanism having a plurality of sets of differently spaced stop elements, and a stop dog for causing operation of said stop mechanism and adjustable to cause the same to be selectively engaged by the severalsets of stop elements.

i3. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, stop mechanism for said vibrating means, a controller for said stop mechanism having a plurality of sets of differently spaced stop elements, and a stop dog for causing operation of said stop mechanism, said controller and dog being both adjustable to cause said dog to be selectively engaged by the several sets of stop elements.

14. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, stop mechanism for said vibrating means, a controller for said stop mechanism having a plurality of sets of differently spaced stop elements, and a stop dog for causing operation of said stop mechanism and having a plurality of operative portions engageable by said stop elements, said controller and dog being both adjustable to bring the several sets of stop elements selectively into position to engage the several portions of said dog.

15. In a sewing machine, stitch forming mechanism including a. longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, a main stop mechanism for said machine, a stop mechanism for said vibrating means, and a common controller for said stop mechanisms.

16. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating neethe, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, a main stop mechanism for said machine, a stop mechanism for said vi- *brating means, and a common controller for said stop mechanisms, said controller being adjustable to cause operation of the several stop mechanisms at variable times.

1'7. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holdingmeans, means for relatively vibrating said work holding means and needle transversely of the latter, a main stop mechanism for said machine, a stop mechanism for said vibrating means, a common controller for said stop mechanisms, and means for moving said controller at a variable speed with respect to the speed of reciprocation of said needle.

18. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, a main stop mechanism for said machine, a stop mechanism for said vibrating means, and a common controller for said stop mechanisms having a plurality of sets of differently spaced stop elements, said controller being adjustable to render the severa1 sets selectively operative to operate the respective stop mechanisms.

19. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter in one direction, a main stop mechanism for said machine, a stop mechanism for said vibrating means, a common controller for said stop mechanisms, means for moving said controller at a predetermined speed with respect to the speed of reciprocation of said neea transversely of the latter in one direction, a main stop mechanism for said machine, a stop mechanism for said vibrating means, a common controller for said stop mechanisms, means for moving said controller at a variable speed with respect to the speed of reciprocation of said needle, and means operating at a constant speed with respect to the speed of movement of said controller for relatively shifting said work holding means and needle transversely to the latter in another direction.

21. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, a main stop mechanism for said machine, a stop mechanism for said vibrating means, a common controller for said stop mechanisms having a plurality of sets of differently spaced stop elements, and a pair of dogs for causing operation of said stop mechanisms respectively, each of said dogs having a plurality of operative portions, said controller being adjustable to bring the several sets of stop elements se lectively into position to engage the several portions of the respective dogs. s

22. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, a main stop mechanism for said machine, a stop mechanism for said vibrating means, a common controller for said stop mechanisms having a plurality of sets of differently spaced stop elements, and a pair of dogs for causing operation of said stop mechanisms respectively, at least one of said dogs being adjustable to cause the same to be selectively engaged by the several sets of stop elements.

23. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, Work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, a main stop mechanism for said machine, a stop mechanism for said vibrating means, a common controller for said stop mechanisms having a plurality of sets of differently spaced stop elements, and a pair of dogs for causing operation of said stop mechanisms respectively, the dog for causing operation of the stop mechanism for said vibrating means being adjustable to cause the same to be selectively engaged by the several sets of stop elements.

24. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said Work holding means and needle transversely of the latter, a main stop mechanism for said machine, a stop mechanism for said vibrating means, a common controller for said stop mechanisms having a plurality of sets of differently spaced stop elements, and a pair of dogs for causing operation of said stop mechanisms respectively, said controller and at least one of said dogs being both adjustable to cause said dogs to be selectively engaged by the several sets of stop elements.

25. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively Vibrating said work holding means and needle transversely of the latter, a main stop mechanism for said machine, a stop mechanism for said vibrating means, a common controller for said stop mechanisms having a, plurality of sets of differently spaced stop elements, and a pair of dogs for causing operation of said stop mechanisms respectively, each of said dogs having a plurality of operative portions said controller and the dog for causing operation of the stop mechanism for said vibrating means being both adjustable to bring the several sets of stop elements selectively into position to engage the several portions of the respective dogs.

26. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, stop mechanism for said vibrating means, a controller for said stop mechanism having a plurality of sets of differently spaced stop elements, and variable speed mechanism for driving said controller, said controller being adjustable to set said variable speed mechanism and to render the several sets of stop elements thereon, selectively operative to operate said stop mechanism.

27. In asewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, stop mechanism for said vibrating means, a controller for said stop mechanism having a plurality of sets of difierently spaced stop elements, a stop dog for causing operation of said stop mechanism, and variable speed mechanism for driving said controller, said controller being adjustable to set said variable speed mechanism and t render the several sets of stop elements thereon selectively operative to engage said dog, said dog having a plurality of operative portions engageable respectively by said elements in accordance with the setting of said variable speed mechanism.

28. In a sewing machine, stitch forming mechanism including a longitudinally reciprocating needle, work holding means, means for relatively vibrating said work holding means and needle transversely of the latter, stop mechanism for said vibrating means, a controller for said stop mechanism having a plurality of sets of differentl y spaced stop elements, ,a stop dog for causing operation of said stop mechanism, and variable speed mechanism for driving said controller, said controller being adjustable to set said variable speed mechanism and to render the several sets of stop elements thereon selectively operative to engage said dog, said dog having a plurality of operative portions engageable respectively by said elements in accordance with the setting of said variable speed mechanism, and said dog being itself adjustable .to further control the engagement of the portions thereof by said elements.

29. In a sewing machine, stitch forming mechanism, work holding means, and means for relatively shifting said stitch forming mechanism and work holding means to cause the former to form in the work separated groups of stitches in different positions, said shifting means including a controlling element having provision for causing shifting from one stitch forming position to another at difierent times during a given movement of said element.

30. In a sewing machine, stitch forming mechanism, work holding means, and means for relatively shifting said stitch forming mechanism and work holding means to cause the former .to form in the work separated groups of stitches in different positions, said shifting means including a controlling element having alternatively operative portions for causing shifting from one stitch forming position to another at different times during a given movement of said element.

31. In a sewing machine, stitch forming mechanism, work holding means, and means for relatively shifting said stitch forming mechanism and work holding means to cause the former to form in the work separated groups of stitches in different positions, said shifting means including a cam having a plurality of cam surfaces adapted respectively to cause shifting from one stitch forming position to another at different times during a given movement of said cam.

32. In a sewing machine, stitch forming mechanism, work holding means, and means for relatively shifting said stitch forming mechanism and work holding means to cause the former to form stitches at different points in the work, said shifting means including a controlling element having alternatively operative portions for causing shifting at different times during a given movement thereof, and means for moving said element at a variable speed with respect to the speed of operation of said stitch forming mechanism.

HARRIETTE M. AVIS, Administratrix of the Estate of Samuel W. Avis,

Deceased.

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