US2577430A - Needle feed sewing machine - Google Patents

Description

A. C. PETERSON ETAL,

NEEDLE FEED SEWING MACHINE Dec. 4, 1951 Filed March 7, 1950 Z a 5mm mu I'll-1|. l.|| -Hw m TN 2 mm a LL M8 Ac M 9. m 5 h N t I I on. Q m IHv E 1/ m Jul/MM ms fi mm I] I}, I: m R T 8 Q? 9k ATTORNEY.

Dec. 4, 1951 A. c. PETERSON ETAL 2,577,430

NEEDLE FEED SEWING MACHINE Filed March 7, 1950 7 Sheets-Sheet 2 FIG. 2

[ll lL 25 I27 I04 I2l IO! I00 2 105 98 IT 99 :07. 96 f 62 'w I08 9'? I H' "H u AM m 11' I W I in. ll III INVENTORS.

ALBERT C. PETERSON BY CLARENCE C. SMITH ATTORNEY.

Dec. 4, 1951 Filed March 7, 1950 FIG. 3

A. C. PETERSON ETAL 7 Sheets-Sheet 5 INVENTORS.

ALBERT c. PETERSON BY CLARENCE C. SMl-TH ATTORNEY.

Dec. 4, 1951 A. c. PETERSON EI'AL 2,577,430

NEEDLE FEED SEWING MACHINE 7 Sheets-Sheet 4 Filed March 7, 1950 INVENTORS. ALBERT c. PETERSON CLARENCE 0. SMITH ATTORNEY.

4, 1951 A. c. PETERSON ETAL 2,577,430

NEEDLE FEED SEWING MACHINE 7 Sheets-Sheet 5 Filed March 7, 1950 F IG.6

INVENTORS C. PE CE 0.

TERSON SMITH ALBERT BY CLAREN ATTORNEY.

Dec. 4, 1951 A. c. PETERSON ETAL 2,577,430

NEEDLE FEED SEWING MACHINE Filed March 7, 1950 7 Sheets-Sheet 6 88 87 89 I04 I, |OO I72 79 .r it: g FIG.9 In I INVENTORS. ALBERT C, PETERSON CLARENCE G. SMITH ATTORNEY.

Dec. 4, 1951 A. c. PETERSON ETAL 2,577,430

NEEDLE FEED SEWING MACHINE Filed March 7, 1950 7 Sheets-Sheet 7 H614 FIG.I6 FIG. I?

was

IN VEN TORS.

A RT 0. PETER BY C ENCE C. SM

ATTORNEY.

Patented Dec. 4, 1951 NEEDLE FEED SEWING MACHINE Albert 0. Peterson, Park-Ridge, and Clarence C. Smith, Chicago, Ill., assignors to Union Special Machine Company, Chicago, 111., a corporation of Illinois Application March 7, 1950, Serial No. 148,101

This invention relates to sewing machines of the type provided with a needle bar which is not only reciprocated but is iven a lateral movement in the direction of feed to assist in advancing the work. It relates further to a machine of this type provided with a four-motion feed dog and one or more four-motion loopers operating across the line of feed.

A primary object of the invention has been to provide a machine of the foregoing type which is of relatively simple and inexpensive construction and which is reliable in its operation upon a variety of different types of work.

Another object has been to provide a machine of the character indicated in which the danger of needle breakage or spoilage is reduced to a minimum. 7

A further object has been to provide simple and readily adjustable means for separately and independently regulating the stroke of the various parts which are shifted in synchronism with the feed of the work in the course of stitch formation. In the preferred form of the invention a four-motion feed dog is provided as the main work advancing means and various other parts are shifted concomitantly with the feeding movement of the feed dog. Thus a needle barcarrier is rocked to impart a needle feed action to the work and assist in advancing the same. Also a looper carrier is rocked in the direction of feed to maintain the proper relationship between the looper and the needle as the latter is shifted with the work; this is in addition to a desired needle avoid movement imparted to the looper. Means are provided for varying the extent of movement of each of these devices in relation to the others. Through the independent adjustment of the driving connections for each of the devices, their movements may be co-related to best advantage for the stitching of various types of work. It has been found that in the handling of different type of work, varying in thickness, hardness, smoothness, and other characteristics, different adjustments of the several driving connections are desirable to insure proper coordination of the parts in the formation of stitches of different lengths.

In attaining the foregoing objects, one advantageous feature of the invention is the employment of a single rotary drive shaft which is in the base of the machine. The connections for frame and pivoted within the latter at substan- 15 Claims. (01. 112-206) including a rock shaft extending along the overhanging arm and having its driving and driven ends enclosed within portions of the needle head and the vertical standard of the frame, respectively. This permits effective lubrication of the relatively moving surfaces at the two ends of the rock shaft.

Another important feature of the invention is the provision of needle guarding elements in front of and in rear of the needle when the latter extends through the work, these guards being shifted in synchronism with the needle as the latter receives its needle feed movement. One of the needle guards is mounted on the feed bar and the other on the looper or looper carrier. In a multiple needle machine the first of these guards will cooperate with the plurality of needles while each looper will carry its own needle guard at the opposite side of the needle.

A further feature of the invention is the provision of connections directly from the feed rocker to the looper carrier or carriers, these connections being capable of adjustment to vary the rocking movement of the carrier in the direction of feed, relative to the movement of the feed rocker, and adapted to impart a movement to the carrier which is equal to the feed stroke plus an appropriate needle-avoid movement. The arrangement is such that the extent of rocking movement of the feed rocker and looper carrier may be varied jointly but the rocking movement tially its mid-point. Needle feed movements are "imparted to the needle bar carrier by connections of the looper carrier may also be varied separately.

Other objects, 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 conjunction with the accompanying drawings, in which:

Fig. 1 is a view, partly in front elevation and partly in vertical section, showing a sewing machine embodying the invention;

Fig. 2 is an end elevational view of the ma- Y chine as seen from the needle head end, the

cover for the needle head being removed and the work support being shown in section to more clearly illustrate the mechanism;

Fig. 3 is a view partly in plan and partly in horizontal section through the overhanging arm of the frame. of the machine, the needle head cover being removed;

Fig. 4 is an enlarged detail view showing the connections for operating a rock shaft in the machine;

Fig. 5 is a view, partially inplan and partially 3 in horizontal section, showing the mechanism in the base portion of the frame;

Fig. 6 is an enlarged detail view, in vertical section parallel with the main shaft of the machine, showing the looper operating means;

Fig. '7 is an enlarged detail view, in elevation, showing therelatlonship between the needles and loopers of a multiple needle machine;

Fig. 8 is a vertical sectional view, taken along the line 8-8 of Fig. 5, showing the work feeding.

and looper mechanisms of the machine;

Fig. 9 is an enlarged detail view,"in" rear elevation, of the work feeding mechanism, some-of the looper mechanism being alsorshown;

Fig. 10 is a detail view, in plan, of a looper with a needle guard;

Fig. 11 is an elevational view of thelooperand needle guard;

Figs. 12 and 13 are plan views of two different forms of throat plate and feed dog which may be used in the illustrative machine;

Figs. 14 and 15 are plan views of different forms of throat plates which may be used in a multiple needle machine embodying the invention;

Figs. 16 and 17 are plan views of feed dogs which may be employed in connection with the throat plates of Figs. 14 and 15, respectively and Fig. 18 is a front elevational view of. a modified arrangement of multiple needles. and cooperating loopers.

Referring now to the drawings, the illustrative machine is of the flat bed, type having a frame including a base portion 1.3,(Fig. 1) with a work supporting surface at its top, a vertical standard ll, rising from one end, of, the base, and an overhanging arm extending from the top of the vertical standard over the base and terminating in a needle head l3. The base and standard may be integrally connected, if desired, or they may be separable along thelinev lea, the two parts being secured together by screws or bolts. as disclosed in the patent to Zeier No. 1,843,188, granted February 2, 1932. A rotary drive shaft, I4 is mounted in suitable bearings in the base of the frame and carries a combined handwheel and pulley l5 on a portion which extends outwardly from the frame at its righthand end ,(Fig. 5). This is the only rotary shaft in the machine. A guard 15a (Fig. 1) may be provided over the handwheel if desired.

In the needle head there is mounted, for reciprocatory and vibratory movements, a needle bar 16 carrying a needle 1611 at its lower end (Figs. 1 and 2). The needle bar is mounted for reciprocation in suitable bearing extensions of a frame 11 which is pivotally mountedat its upper end near the top of the needle head by means of a stud 18 having screw threaded engagement with a lug [9, depending from the top of the needle head. The frame I! is thus capable of vibratory movements in a vertical plane parallel with the line of feed. To retain the frame within this plane as it is vibrated, a plate 20 is secured to the outer face of the needle head adjacent the lower end of the frame I! and this plate extends over the outer face of the frame. A link 2| is pivotally connected with the frame ll near its lower end by means of a shouldered screw 22. The opposite end of the link 2| is similarly pivotally attached by meansof a screw 23 to the lower end of an arm 24 seeured, by a clamping sleeve or the like to a rock shaft 25. This rock shaft is journaled adjacent the. arm 24 in a bearing sleeve 26 (Fig. 3) carried by a rearward extension 21 of the needle head. housing. At its opposite end the shaft is journaled in a bearing sleeve 28 mounted in a rearward extension 29 of the frame housing, at the upper end of the vertical standard. Within the hollow of the extension 29, which is in open communication with the interior of the vertical standard,

.- there is clamped to the shaft 25 a sleeve 30 which has a horizontally extending arm 3i. To assist in holding the shaft 25 against axial movement :a collar 32 is secured to it, adjacent the outer end. of the bearing sleeve 28.

Arm 3|" is provided with an elongated arcuate slot 33, adapted to. receive the shank of a ball-pin 34.,(Fig. 4) which may be secured in any desired positionalong the slot 33 by means of a nut (Fig. 3) engagedwith threads on the end of the pin. Cooperating with the spherical portion of the ball-pin 34 is a strap 35 at the upper end of a pitman 31. The lower end of this pitman (Fig.

. a strap 4! at the lower. end of a pitman 42 which has a strap 43 at, its upper end surrounding a 1 spherical, portion of. a ball-pin secured by a nut 44 to a forwardly extending part 45 of a lever 46. The latter is mounted for rocking movement withinthe overhanging arm by means of a transversely extending shaft, or stud 41. At its opposite end the lever 46 has; a. forwardly extending portion to which is secured, by means of a nut 49, a ball-pin; that is surrounded by av strap 50. This is carried at the upper end of a short link 5| which has av similarv strap 52 at its lower end cooperating with the spherical surface of a ballpin projecting laterally from a block 53 secured to the needle bar [6. A. pin 54 projects toward theleft in Fig- 1 from the block 53 into a guide slot 55 (Fig. 2) extending lengthwise of the frame 11. Pin 54 prevents turning of the needle bar relative to the frame.

It. will be apparent that, through the connecztions above described,.the needle bar is reciprowhen it. extends through. the work and it will be restored to .its initial position after it has been raised, above the. work. In this way the needle .assists feeding the work. The provision of 56a in an opening formed in the top of a carrier '51, having, a downwardly extending portion 58 connected with a hub or sleeve 59 rockably 'recelve a nut 60b at its other end to maintain the spherical surfaces at the connections between the, various elements, as described, permits the desired movement, of. the parts without binding.

Cooperating with; the needle, when it is beneath the work support, is a thread carrying looper 5B (Figs.v 1, 5, 8, 10 and 11) adapted to form with the needle a so-called double locked I stitch of the type commonly designated No. 401, as indicated in Federal Standard Stock Catalogue, section IV, part 5, page 9. The cylindrical shank of the looper is secured by a screw mounted on a bolt 60. The, latter has an enlarged head 60a at one end and is threaded to the assembly. Bolt 60 is carried by a down- .wardly extending arm of a sleeve 6| secured by ;a..pair of screws 61a. to a rock shaft 62. A ballpin 63 projects-forwardly from the looper carrier and is secured thereto by a nut 64. Cooperthe opposite end of which has a strap 6! cooperating with a ball-pin 68 secured by a nut 69 to the upper end of an arm 10. The latteris secured to a rock shaft 'II extending transversely of the base beneath the main rotary drive shaft rounding a spherical eccentric 'IIsecured to the shaft It. To facilitate assembly of the parts the main shaft is formed in two sections, I4 and Ida, which are connected together by a coupling 18. As indicated in Fig. 6, the operating parts just described are located within a lubricant retaining housing forming a portion of the base of the frame. a 1

Rocking of the shaft 62, and hence the looper carrier 57, in the direction of feed is effected through direct connections with a feedrocker forming part of the l-motion feed mechanism of the'machine. Accordingly, this feed mechanism will now be described.

Refering particularly to Fig. 9, there is shown a feed rocker I9 secured by screws 80 to a shaft 8|. The latter is journaled in suitable bearings 83 and 84 extending upwardly from the bottom plate of the machine frame. Collars 85 and 86, secured to the shaft 8| adjacent the outer faces of the bearings, serve to retain the shaft against axial movement. A feed bar 87 is rockably mounted at the top of the feed rocker and for this purpose it is secured by a screw 88 to a hollow shaft 89 journaled in two' upwardly extendin; arms of the feed rocker. A downwardly extending curved arm 90, integral with the feed bar 87, is pivotally connected with the lower end of a strap 9| surrounding an eccentric 92 carried by the section' ma of the main shaft. Through these connections the feed bar is rocked about the axis of shaft 89 to impart lifting and lowering movements to a feed dog 93. The latter is secured to the forward end of the feed bar by means of a screw $4 which cooperates with a' vertically elongated slot to permit vertical 'adjustment of the feed dog. Feed and return movements are impa'rted'to the feed dog by an adjustable eccentric or crank element 95, which may be shifted to any desired position along a diameter of'a disc 95a and cooperates with a strap 95 pivotally connected with the forward end of an arm 97 secured to the feed rocker. This arrangement is similar to that disclosed in the patent to Wohlpart No. 1,817,727, granted August 4, 1931. The rearward end of the arm 97 is formed as a split sleeve 98 arranged to be clamped, by screws or the like, to a rod 99 extending laterally from the feed rocker, as best shown in Fig. 9. It will be apparent that the adjustable eccentric or crank will, through the connections described, cause the feed rocker to rock about the axis of shaft 8I and thereby impart the feed and return movements to the feed bar and feed dog. The extent of such movements may be readily varied by adjusting the position of the element 95.

An arm Idll, integral with the split sleeve 98 and extending upwardly therefrom, is provided witha pair of apertures IUI (Fig. 2) adapted to receive a pivot pin or hollow sleeve I02 In Fig. 2 the pivot elementis shown in the-upper f the two apertures. It cooperates with a forked portion I03 of a link I04 which extends forwardly and is pivotally connected by means of a bolt I05 with an arm II". The bolt I05 is adapted to be secured in any desired position along an elongated slot I06 in the arm 11, thus providing for variation of the extent of rocking movement of the latter. Arm I0! is secured to the shaft 62 by means of a forked sleeve I08 at the lower end of the arm. Accordingly, the rocking movements of the arm are imparted to the looper carrier. The arrangement is preferably such that the looper is shifted in the line of feed to an extent greater than the movement of the feed dog. This permits the looper to follow the movement of the feed dog, as well as the feeding movement of'the needle, and, in addition, to partake of an extra movement equal to the usual needle avoid movement of a four-motion looper. It will be understood that the extent of rocking movement of the looper in the line of feed may be varied conjointly with the feed stroke of the feed dog by adjustment of the crank element 95. It may also be varied separately and independently of the adjustment of the feed stroke by changing the position of the bolt I05 in the slot I96. Both of these adjustments, moreover, are independent of the adjustment of the needle feed movement of the needle bar which has been explained in relation to Fig. 4.

Means are provided in accordance with the invention for guarding the needle both on its forward side and its rearward side. The guards provided for this purpose not only insure proper cooperation between the needle and looper and prevent injury to these, but also tend to prevent excessive bending of the needle in the course of its needle feed action. The guard cooperating with the forward side of the needle is in the form of a curved finger I09 (Figs. 10 and 11) mounted directly upon the looper. This finger extends laterally in substantially parallel relation to the loop seizing beak of the looper from a plate-like gagement with the feed bar.

portion III] which=-rests on the lower arm of the C-shaped looper. The plate III) is provided with a small opening adapted to fit over a pin I II carried by the looper and the guard is securedto the looper by means of a screw I I2, I

The guard on the rearward side of the needle is in the form of a plate I I3 (Fig. 8) adapted to be mounted on the feed bar 87. A pin I I4 carried by the plate II3 cooperates with a groove II5 in the side of the feed bar and the plate is secured by means of a screw I I6 passing through an opening II] in the plate, this screw having threaded en- The arrangement is such that the plate I I3 may be adjusted slightly in relation to the feed bar. At its forward end the plate is bent laterally, transverse to the line of feed, to provide a guard finger or element I I9 (Figs. 5 and 8) parallel with the guard finger I09. As shown in Fig. 8 a portion of the plate I I3 is cut away to provide access to the screw 94 which secures the feed dog tothe feed bar.

It will be understood that, in the operation of the machine, the needle will descend between the fingers I99 and I I9'and while the needleis below the work and is shifted rearwardly to produce its vancing load on the needle, the finger I09, will bending.

lend support to the needle and prevent excessive T, 7 "Abdvethe work support 'a presser foot I20 (Figs. land- 2) is provided to urge'the work yieldingly against the-throat plateaIid' teed dog. 'This presser foot may be ofany suitable-form: and has a shank I-ZIsecured-tothlower endof-a presser bar I22. The latter is urged downwardly by a springv -I 23 surrounding the bar and abutting-at its upper endagainst the bottom of an adjustable screw threaded sleeve F24 and at itslower end against a block I25 secured to the press'er bar.

nnysui-table means may be provided for lifting thepresser bar'whenever desired to remove work or introduce I new work. For this purpose, there is illustrated a link "IZBs'ecured at one end to the block t2 and ati'ts other endto-a horizontally extending armof a-"bell crank lever I2 piv'otally supportedhy means of a shouldered screw 'IZ-B-on a forwardly extending-lug 129 of the rearwall oi theoverl-i-angingarm. A-spring lflnormally rocks the bellcrank lever I 21 a: countorclocb wise-direction '(Fig. 1-). A rodor link tel con nected' with amupwardly extending arni of the bellcrank lever is connected at its-other end with a plate 132 secured to a-roch shaft 33. The latter is mountedin asuitablebearingin the rear wall of the vertical standard and may be operated in any suitable way: connections from afoot treadle or knee press. Suitable connections for this purpose are shown and described in-the pending application of Albert C. Peterson et al.-, Ser.

' No; 58,222, filed November 4, 1948.

Various forms of throat platemay be useddepending-upon the character of the feed dogemployed. In Fig. IZthere is shown a throat plate 151 cooperating with-a feed dog 83 whichisrelativel-ynarrow adjacent the path of the needle. "A

needle opening B8 is provided-in the th-roatplate and no needle: opening is-requ-ired in the feed dog. In Fig. l3, on-:th'e otherhand, there is shown a threat plate 1'39 having simply a rectangular opening through whicheL-ieeddog 93I isladapted to passfithisfeed dog-having-a needleope'ning 8. Referring nowto" Fig; 7,--there is shown. one

arrangement of'--multiple needles and multiple loopers. This shouldbe used when it isdesired to provide lines of stitching which are relatively close together. Atthelower end-ofthe needle bar an enlarged, transversely-extending head Illa is provided to receive a pair-of needles I 42. Thehead I4 Ia isinclined-both to the direction of feed and to a line transversethereto-,so that the needles may readily coopera'tewi-th rather closely spaced loopers I45 and fltmountedon a single looper carrier I45. Thelatterhasasleevelike hub at its lower end-mounted on a shouldered screw or bolt I46 carriedbya downwardly extending portion of a sleeveitlseicuredto-a rock shaft I48. The latter is similar to the rock shaft 62 of Fig. 8 and serves to impart the rocking movementtothe needle carrier whichcauses the looper to follow the needle in its needle feed action and also provides "the usual needle avoid function. Rocking of the looper carrier I 45 about the screw I46, to provide-the loop-seizing and shedding operations of the loopers, maybe performed -by-the same type of connections provided for the similar rocking of the looper. carrier 51 QFigs, -1, 5 adds) -'It will be understood th'ataneedle guard, similar tothe element ms (rig. rmma beprovided "is adaptedto carry apair of needles I50. operating'withthe latterare two'loopers I5I and shaft 62 I ing to be formed is-adequate. At'thelower end of the needle b'ar -a;-'c'rosshead I49 is arranged directly across the'line of feed. This crosshead 152 which maybeof the same form as the looper 55 ci'the first embodiment described and may carry' needle guard elements similar to I09 of Fig. 10.

Looper I5I- is secured to the upper end of a carrier I53 having-a sleeve-like hub I54 at its lower end rockably mounted on a bolt I55 adjustably retained-by a slot I56 in a downwardly extending part'of a sleeve I 51- secured' to a rock The latter is adapted to be rocked in the same manner as the shaft 62 of Fig. l

to" cause the loopers to rock in the direction of feed. 'Locper- I52 is similarly secured to the upper end of a carrier I58 having a sleeve I59 at its lower end rockably mounted on a bolt I60 secured in any desired position along a slot IBI -in the downwardly extending portion of sleeve "I51. A'link- I62 pivotally connected witheach "of the carriers I53 and-I58serves to couple these for movement in'unison. Loop seizing and loop shedding movements areimparted to the loopers by means of a link I63 connected at one end to'a ball-pin extending 'from' the carrier I58 "and at'its'other end to a ball pin extending 'from "the upper end of an 'arm I64'secured'to a rock shaft I65. The latter corresponds with shaft II of Fig. 1 and may be operatedin' the same manner.

The throat plate and feed dog cooperating "with the mechanismcf Fig. 18 may be of any suitable form. For example, a throat plate of the form shown irrFig. 14 may be employed,

'a series of elongated rectangular openings" I1 I.

thisbeing'provided with needle openings I51 and openings through which the various portions of a feed dog I68 (Fig. 16)'may pass. Another form of throat plate I6'9,is shown in Fig.'15, this having merely 'a series of rectangular openings 'for the passageofthevarious sections of a feed'dog I'IO (Fig.1?) The latter, inturmhas a pair of needle The throat'plate and feed dog may, of courseassume a variety of other different forms. Those used in connection with the needle and looper arrangement of Fig. 7

' will of "course, have the needle'openingscloser preferably constructed for automatic lubrication of the principal wear receiving surfaces. In

general, the lubricationmeans may be similar to that disclosedin the above mentioned Peterson, et al application, Serial No. 58,222. However,

as shown in Figs. 5 and-9, the-bearings for the feed bar-81 maybe lubricated, if desired, by

'wicking I 12, formed of felt or the like, which surrounds'the shafttl adjacent-one endof the bearing lug 83and' extends upwardly and then in'to and' through the hollow bore of the shaft 88. Suitable radial apertures may be provided through-the-wall of this shaft to conduct excess Y lubricant from the lower bearingto the bearing surfaces at the top of the feed rocker. A- platelike member I 13 may be mounted on the shaft 8I to retain the wicking in proper position.

While an illustrative embodiment of the in- I vention-a'nd certain modifications thereof have een disclosed in considerable-detail. itwill be the form, construction, and arrangement of'the several parts without departing from the general principles and scope of the invention.

What we claim is:

1. In a sewing machine having a frame with a v work supporting base, a vertical standard and an overhanging arm terminating in'a needle head and having a single rotary shaft which extends longitudinally of said base, the combination of a reciprocable needle bar, a carrier for said bar pivotally mounted in said needle head for movement of the lower end of said bar along the line of feed, connections from said shaft for reciprocating said needle-bar, and connections from said shaft for rocking said carrier about its pivot, said last mentioned connections including a rock shaft extending along said overhanging arm, an arm secured to said rock shaft in said needle head and a link pivotally connected with said arm and said carrier.

2. In a sewing machine having a frame with a work supporting base, a vertical standard and an overhanging arm terminating in a needle head and having a single rotary shaft which extends longitudinally of said base, the combination of a reciprocable needle bar, a carrier for said bar pivotally mounted in said needle head for movementof. the lower end of said bar alon the line of feed, connections from said shaft for reciproeating said needle-bar, and connections from. said shaft for rocking said carrier about its pivot, said last mentioned connections including a rock shaft extending along said overhanging arm and having its ends enclosed within said standard and said needle head, respectively, means in said standard for driving said rock shaft from said rotary shaft, an arm secured to said rock shaft in said needle head and a link pivotally connected with said arm and said carrier. 4

3. In a sewing machine having a frame with a work supporting base, a vertical standard and an overhan ing arm terminating in a needle head and having a single rotary shaft which extends longitudinally of said base, the combina tion of a reciprocable needle bar, a carrier for said bar pivotally mounted in said needle head for movement of the lower end of said bar along the line of feed, connections from said shaft for reciprocating said needle-bar, said connections including a lever extending through said overhanging arm and pivoted intermediate its ends within said arm, and connections from said shaft for rocking said carrier about it's pivot, said last mentioned connections including a rock shaft extending along said overhanging arm, an arm secured to said rock shaft in said needle head and a link pivotally connected with said arm and said carrier. I

4. In a sewing machine having a frame with a work supporting base, a vertical standard and an overhanging arm terminating in a needle head and having a single rotary shaft which extends longitudinally of said base, the combination of a reciprocable needle bar, a carrier for said bar pivotally mounted in said needle head for movement of the lower end of said bar along the line of feed, connections from said shaft for reciprocating said needle-bar, and connections from said shaft for rocking said carrier about its pivot, said last mentioned connections including a rock shaft extending along said overhanging arm and having its ends enclosed within said standard and said needle head, respectively,

5. In a sewing machine having a frame with v a work supporting base, a vertical standard and an overhanging arm terminating in a needle head and having a four-motion work feeding member in said base, a needle bar mounted in said needle head for reciprocation and for vibratory movement in the direction of feed and a main rotary drive shaft, the combination of means operated by said shaft for imparting reciprocatory and vibratory movements to said' needle bar, a looper in said base mounted for loop-seizing and shedding movements across the line of feed and for rocking movements in the direction of feed, connections from said shaft to said work feeding member including a feed rocker, connections from saidfeed rocker to said looper for imparting said rocking movements thereto in the line of feed, and connections from said g shaft to said looper for imparting loop-seizing and shedding movements thereto.

6.'n a sewing machine having a framewith a work supporting base, a vertical standard and an overhanging arm terminating in a needle head and having a four-motion work feeding member in said base, a needle bar mounted in said needle head for reciprocation and for vibratory movement in the direction of feed and a main rotary drive shaft, the combination of means operated by said shaft for imparting reciprocatory and vibratory movements to said needle bar, a looper in said base mounted for loop-seizing and shedding movements across the line of feed and for rocking movements in the direction of feed, connections from said shaft to said work feeding member including a feed rocker, connections from said feed rocker to said looper for imparting said rocking movements thereto in the line of feed, said last mentioned connections including means for varying the extent of said rocking movement in relation to the movement of said feed rocker, and connections from said shaft to said looper for impart ing loop-seizing and shedding movements thereto.

7. In a sewing machine having a frame with a work supporting base, a vertical standard and an overhanging arm terminating in a needle head and having a four-motion work feeding member in said base, a needle bar mounted in said needle head for reciprocation and for vibratory movement in the direction of feed and a main rotary drive shaft, the combination of means operated by said shaft for imparting reciprocatory and vibratory movements to said needle bar, a looper in said base mounted for loop-seizing and shedding movements across the line of feed and for rocking movements in the direction of feed, a feed bar carrying said work feeding member, connections from said shaft for operating said bar to impart four-motion movements to said memher and for imparting said loop-seizing and shedding movements and said rocking movements to said looper, and needle guards mounted on said looper and said feed bar, respectively, in front of and in rear of the needle.

8. In a sewing machine having 1 a frame with a work supporting base, a vertical standard and an; overhangingarm terminating in-a needle head and having a four-motionqwork feedin 'member in'said base, a needle bar .mounted in said needle head for reciprocation andfor vibratory movement in the direction of feedand a main rotary drive shaft, the combination of means operated by said shaft for imparting reciprocatory and vibratory movements to said needle bar, a loopel work supporting base, a vertical standardand an overhanging armterminatingin a needle head and having a four-motion work feeding member 5;

in said base, a needle bar mounted in'saidneedle; head for reciprocationxandfor vibratory move-- means for shifting said loopers inthe direction.

of feed to an extent greater than the movement in the same direction of the cooperating portions of the needlesto maintain the desired-relationship between the needles andloo ers during stitch formation and to provide a needle avoiding movement of the loopers.

10. In a sewing machine having a frame with a work supporting base, a vertical standard and; an overhanging arm terminating in a'needle head and having a four-motion work feeding "member in said base, a needle bar mounted in said needle head for reciprocation and for vibratory move'-' ment in the direction of feed and a main rotaryv drive shaft, the combination of means operated by said shaft for imparting reciprocatory and vibratory movements to said needle bar, a plurality of needles carried by said needle bar, a plurality of loo ers cooperating with said needles inthe formation of lines of stitching, meansfor impart-' ing loop-seizing and loop-shedding movements to:

said loopers across the line of feed, means for shifting said loopers in the direction of feedto: anextent greater than the movement'in the same.

direction of the cooperating portions. ofizthe needles to'maintain the desired relationship be:

tween the needles and-loopersduring stitch for-' mation and to provide a needle avoiding move-.

ment of the loopers, and means for independently i varying the extent of the vibratory movement of the needle bar and the rocking movement of the loopers.

11. In a sewing machine having a framewith a work supporting base, a vertical standard andan overhanging arm terminating in a needle head,

and having a four-motion work feeding member in said base, a needle bar mounted in saidneedle head for reciprocation and for vibratory movement in the direction of feed and a main rotary rive shaft, the combination ofmeans operat d by said shaft for imparting-reciprocatory and Vice bratory movements to said needlebar, a plurality of needlescarried bysaid-needle bar, a plurality of loopers cooperatingwith said needles-in the formation of lines of stitching,- means for imparting loop-seizing and'loop-shedding movements to said loopers across-the line offeed, connections from said shaft for imparting work feeding and return movements and lifting and lowering movementsto said work feedingmember, means for.

shifting said'loopers in the direction of feed to an extent greater than the-movement in the same direction of the cooperating portions of the needles to maintain the desired relationship between the needles and 1oopers, during stitch fori mation and toprovide a needle avoiding movement of the loopers, means for-varying the work feeding and returnmovements of said work feed-. ing member,.and means forseparately and inde-..

pendently varying theyextent of the vibratory movement of said needle bar and the rockin movement of the loopers.

12. In a sewing machine having aframe with a work supporting base, a vertical standard and anoverhanging .arm terminating in a needle.

head and having a four-motion work feeding member in said base, a needle bar mounted in said'needle head for reciprocation and for vibratory movement in the direction of feed and a main rotary: drive shaft, the combination of means operated by said shaft for imparting re.- ciprocatory and vibratory movements, to said needle bar, a plurality of needles carried by said needlebar, a plurality of. loopers cooperating with said needles in the formation of lines of stitching, means for imparting, loop-seizing and loop-shedding movements to said loopers across the-line of feed, means for shifting said loopers inthe directionof feed to an extent greater than the'movement in the same direction of the cooperating portions of, the needles to maintain the desired relationship between the needles and loopers during stitchiformation and to provide a needle avoiding, movement of the loopers, and needle guards infront of and inrear of said needles in the region of said loopers arranged to be (shifted with saidneedles in the direction of fee 13. In -a sewing machine having a frame with a work supportingbase, a'vertical standard and an overhan ing arm terminating in a needle head and having a four-motion work feeding member in said base, a needle barmounted in said needle head for reciprocation and for vibratory movement in the direction of feed and a main rotary drive shaft, the combination of means 'operated by said shaft for imparting reciprocatory and vibratory movements to said needle bar, a plurality of needles carried by said needle bar, a plurality of loopers cooperating with said needles in the formation of lines of stitching, means, for imparting loop-sei zing and loopshedding movements to said loopers across the line of feed, means for shifting said loopers in the direction of feed to an extent greater than the movement inrthe same direction of the cooperating portions of the needles to maintain the desired relationship between the needles and loopers during stitch formation and to provide a needle avoiding movement, of the loopers, and needle guards in front of and in rear of said needles in-the region of said loopers arranged to be shifted with said needles in the direction of feed,,one of said; guards being connected with said work feeding member and other of said guards being connected with said loopers.

14. In a sewing machine having a frame with a work supporting base, a vertical standard and an overhangin arm terminating in a needle head and having a four-motion work feeding member in said base, a needle bar mounted in said needle head for reciprocation and for vibratory movement in the direction of feed and a main rotary drive shaft, the combination of means operated by said shaft for imparting reciprocatory and vibratory movements to said needle bar, a looper in said base mounted for loop-seizing and shedding movements across the line of feed and for rocking movements in the direction of feed, connections from said shaft to said work feeding member including a feed rocker, connections from said feed rocker to said looper for imparting said rocking movements thereto in the line of feed, means for varying the extent of the rockin movements imparted to said feed rocker, means for varying the extent of rocking of said looper in relation to the movement of said feed bar, and connections from said shaft to said looper for imparting loop-seizing and shedding movements thereto.

15. In a sewing machine having a frame with a work supporting base, a vertical standard and an overhanging arm terminating in a needle head l4 and having a four-motion work feedin member in said base, a feed-bar carrying said work feeding member, said feed bar being mounted for pivotal and bodily movement, a needle bar mounted in said needle head for reciprocation and for vibratory movement in the direction of feed and a main rotary drive shaft, the combination of means operated by said shaft for imparting reciprocatory and vibratory movements to said needle bar, a plurality of needles carried by said needle bar, a plurality of loopers cooperating with said needles in the formation of lines of stitching, means for imparting loopseizing and loop-shedding movements to said loopers across the line of feed, and means for shifting said loopers in the direction of feed to an extent greater than the movement in the same direction of the cooperating portions of the needles to maintain the desired relationship between the needles and ioopers during stitch formation and to provide a needle avoiding movement of the loopers, said last mentioned means including a connection from said feed bar to said loopers.

ALBERT C. PETERSON.

CLARENCE C. SMITH.

No references cited.

Images