US1452633A

US1452633A - Sewing machine

Info

Publication number: US1452633A
Application number: US434537A
Authority: US
Inventors: William H Barnett
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-01-03
Filing date: 1921-01-03
Publication date: 1923-04-24
Anticipated expiration: 1940-04-24

Description

L45233 W. H. BARNETT SEWING MACHINE Filed Jan. 5. 1921 7 Sheets-Sheet l fum;

r/J m A W .ww s a L 7 a W 2 W. H. BARNETT SEWING MACHINE Filed Jan. 5;

mu-'umm-A, lg-llmll Apr. 24., 1923. 1,452,633

W. H. BARNETT SEWING MACHINE Filed dan. 5, 1921 7 Sheets-Sheet 3 Apr; 24, 1923.

w. H. BARNETT SEWING MACHINE Fild Jan. 7 sheets-sheet 4 gwen/tto@ arbor mm1@ Apr. 24,' w23.

W. H. BARNETT SEWING MACHINE 7 sheets-sheet .5

Filed dan. 3, 1921 gwuentoz Apr. 24; 1923. W. H. BARNETT SEWING MACHINE 1921 '7 Sheets-Sheet 6 Filed Jan. 5k,

Apr. 24,` 1923.

W. H. BARNETT SEWING MACHINE '7 Sheets-Sheet 7 -Filed dan. s, 1921 Patented pr. 24, 1923.

,UNH

WILLI B.' BARNETLOF KNXVILLE, TENNESSEE.

SEWNG MACHINE.

application mea January s, 1am. serial no. 434,537.

To all lwhom it may concern:

Be it known that I, WILLIAM H. BAnNETr, a citizen of the United States, and aresident of Knoxville, Tennessee, have invented new and useful Improvements in Sewing chines, which invention is fully set forth in the following specification.

The object of this invention is the provision of a sewing or embroidermg machine and particularly a machine for producing a` class of embroidery known as Egyptian embroidery, Oriental embroidery, carpet embroidery, or Persian woven fabric, such embroidery being now extensively used, for example, on dresses and ladies wearing .apparel generally, table covers', scarfs, sofa pillows and other interior decorations. Heretofore this class of embroidery has been coinmonly produced by hand only, so far as I am informed; but whether performed by hand or by my machine, the stitches are First produced in loop formation, that is to say, thread or yarn is carried through the cloth or fabrlc 1n a succession .of-loops which are left projecting from the fabric at the right side of the mshed work, succeeding lines of stitches being closely grouped or positioned so as to roduce a close matting of the loops conormin to the desired pattern or design of embroi ery. The length of projection of these loo s at the right side of the work may vary as d) p ery they are made relativelylong, anywhere from three-eighths of an inch up. The rojecting thread loo s are then trimmed Just enough to clip t e loops leaving two rojecting threads for each loop. rlhe em- Eroidery may be made all in one color of thread or yarn, or in combinations of colors. Improvement upon the machine of my pending application Sr. No. 410,039 filed Sept.

13 1920, is a further object.

:[he aforesaid and other objects are attained by the present invention. What is now believed to be the preferred embodi ment thereof is illustrated in the accompanyin drawings, wherein- Fig. 1 is a perspective View of the complete machine;

Fig. 2 is a rear elevation thereof;

Figs. 3 and 4 are detail views of the feeddogs;

Fig. 5 -is a horizontal sectional viewv on line 5--5 of Fig. 2;

Fig. 6 is a vertical section on line 6-6 .of Fig- 5; y

esired, but usually in such embroid- 7 and 8 are. detail views of arts; Flg. 9 is a perspective view loo ing to- 'ward the head of the machine with the detachable section or cover of -moved;

Fig. 10 is an elevation (on line 10-10 of Fig. 2) looking into said cover and showing pars of the mechanism associated therevwit Figs. 11 and 12 are elevations looking toward the end, of the head of the machine with the cover omitted excepting a portion ofthe lower edge thereof, and with operating parts shown in diiferent positions 1n the two views respectively,

the head re- Figs. 13, 14 and 15 are detail views, Fig. 13 belng in section online 13`13 of Fig. 11;

Fig. 16 is an elevation (with some parts in section) of the thread control mechanism looking in the direction of the arrows on line 16-16 of Fig. 2;

Fig. 17 is a hor1zontal section on line 17-17 of Fig. 16;

Fig. 18 is a vertical section on line 18-18 of Fig. 17;

Fig. 19 is a vertical section on line 19--19 of Fig. 16;

Fig. 20 is a vertical section through the throat plate and its adjustingmechanism;

Fig. 21 is a horizontal section on line 21-21 of Fig. 2o; y

gig. 22 is a plan View of the throat plate; an

Fig. 23 is a detail perspective vof the presser-foot. A

Machine frame and main driving con/nections.-Referring to the drawings, 30 is an ordinary sewing machine table. The machine frame comprises a hollowi upright column or standard 31, hollow horizontal arm or goose-neck 32, and a hollow upright head 33 preferably integrally formed or cast in one piece, the Hanged base of the standard resting upon and fixed to the table. A detachable hollow head section or cover 34 is secured in osition to' the head by four screws 35. he main drive shaft 36 is supported horizontally in the hollow arm 32 in used according to whether a single or two or more parallel lines of stitches are to be formed. The needle-bar 42, preferably of rectangular cross-section, is simultaneously reciprocated1 lon itudinally up and down to cause the need e to pierce and then withdraw from the workV and swung 'laterally back and forth at its lower end to reciprocate or oscillate the needle sidewise a distance equal to the length of stitch belng formed. As shown (see Figs. 5 and 10), needle-bar 42 hastherethrough three longitudinal thread-passages 43 each slightly enlarged at its lower end to receive a needle 41 clamped in place by a set-screw 44 with the thread passages of the bar and needle in axial alinement. While only one needle is shown, three needles may be used in the machine illustrated, and a needle-,bar having more thread passages may be provided where it is desired to use more than three needles. Needle-bar 42 moves in slots or notches 45 and '46 in the top and bottom ianges of cover 34 and is guided and controlled in its movement by means presently described.

The means for longitudinally reciprocating the needle-bar are as follows: An elon gated wheel or hub 47 is secured by setscrews to thel inner end of drive-shaft 36, as best shown in Figs. 5 and 6. An elongated worm-gear 48, Fig. 8, has an axial stem or shaft 49 iixed thereto and projecting therefrom at both ends with a screwhead 50 at one extremity of the shaft. Said worm-gear is positioned in a transverse chamber or recess 51, Figs. 5 and 6, in the wheel 47. Two.

collar plates

52 and 53, Figs. 5, 6 and 7, are removably secured in a groove across the periphery of wheel 47 by two

screws

54, 55, notches in the edge of each plate (Fig. 7) embracing the shank of each screw beneath the head thereof. Two other semi-circular notches 56 in said plates embrace the shaft 49 of the worm-gear adjacent its head 50 and constitute a supporting bearing. At its other end said shaft 49 is supported in a bearing opening in the wall of wheel 47 at the bottom of chamber 51, as shown in dotted lines, Fig. 5. Thus, the worm-gear 48, supported at its opposite ends by said bearings, may be rotated by a screwdriver projected into engagement with screw head 50 through an opening 57 in the front wall of the head 33 of the machine frame. 58 is an adjustable plate bearing against the flat outer end surface of wheel 47 and having thereon a rib 59 slidable in an undercut channel 63 in said surface, said channel at its bottom opening into the chamber 51. Worm-teeth on the inner edge of rib 59 engage the worm-wheel 49, whereby rotation of the latter imparts longitudinal adjustment to the plate 58. By such adjustment the crank-wrist or pivot stud 60 fixed to plate 58, will be moved nearer to or further from the axis of wheel l47 about which it rotates. At its upper end a pitman 61 engages crank-wrist 60 and at its lower end engages pivot stud 62 fixed to needle-bar 42, thereby longitudinally reciprocating the latter, the amplitude of such movement depending upon the position of eccentricity to which crank-wrist l60 is adjusted and determining the length of loop of thread or yarn projected through the fabric by the needle at each reciprocation thereof, which len h as before stated is usually from threeeig ths of an inch up. A

Feed-me0kam'8m.-A top-feed is used. There are two parallel feed-

dogs

65, 66, Figs. 3, 4, 9 and 10, with teeth on their bottom surfaces. They are' moved or swung opposite the direction ofl feed while lifted from the work or fabric, then lowered to yieldingly engage the work, and then moved or swung backward while gripping the work to feed or advance the same the length of one ystitch for each such movement. The feeddogs are spaced apart and each has two right-

angled arms

67, 68, at its ends respectively, the corresponding arms on the two dogs projecting toward each other, and providing rectangular -space between the feeddogs slightly wider and considerably longer than the presser-foot which operates in said space, such length allowing for the forward and backward movement of the feed-dogs with relation to the preer-foot. There is a clearance between the ends of the arms 67 68, at the medial dotted line of Fig. 9. Two upstanding longitudinal flanges 0n each feed-dog form a groove to receive a foot 69 on a vertical stem 70. A screw pivot pin 71 pivots each feed-dog to its foot at a point toward the forward ends of both foot and dog, the bottom edge of the foot being inclined upward in opposite directions from a point beneath the pivot, as best shown in Fig. 4, whereby each feed-dog has a pivotal rocking motion with a normal tendency to tilt downward at its rear end because of the positioning of the pivot nearer the front end. When an extraordinary thickness of` fabric, such as part of an embroidery design or a `heavy seam, is engaged under the forward end of o ne of the dogs with a lesser thickness of work under its rear end, the dog tilts upward at its forward end so as to engage work l throughout approximately its entire length, such tilting being reversed with like effect when the greater thickness is under the rear end of the dog. The two stems 70, 70 have vertical movement in two sockets 71, 71 (Figs. 9 and 10) in opposite 'ends respectively of a block or plate 72. A transverse stop pin 73 through each stem 71 works in a slot 74 of block 72, prevents turning of the stem in its socket and thereby holds each dog in its proper alinement with the two dogs .stem 70 in the socket to yieldingly press the corresponding feed-dog into engagementv with the fabric on the throat-plate. As the pressure of each feed-dog is thus exerted by its spring-7 5 the two dogs may independently adjust themselves to any different thicknesses of fabric or work thereunder, for instance, the left-hand dog may be engaginga thickness of one quarter of an inch while that part of the work under the right hand dog may be of much less thickness with both dogs uniformly gripping the surface of the work or fabric to feed or advance-it in the feed stroke of the dogs. This independent movement of the two dogs and the aforesaid tilting of each dog insures uniform feed ,action regardless of differences and varations of thickness of the work or fabric engaged by the dogs.

A feed bar 77 has a longitudinal bore or elongated socket in its lower ,end to receive stem 76 rising centrally from the block 72 and adjustable to different elevations in the socket, a pin 78 through the stem being movable in slots 79 at opposite sides of bar 77 to prevent turning of the 'stem in its socket. ',lwo set-screws 80 at opposite sides of the lower end of bar 77 engage stem 76 to secure or set it and the feed members supported therefrom at the desired elevation dependent upon the length of needle-bar stroke which in turn determines the length of loop to be projected through the work at each stroke of theneedle. ,In other words, for an ladjustment of the needle-bar actuating means to lengthen the stroke of the needle, the stem 76 is set at a correspondingly higher position in its socket, and vice versa. Feed bar 77 is preferably rectangular in cross-sec'- tion and throughout its length slidingly bears against one side of the needle-bar 42 and with the latter projects through they

notches

45 and 46 in the top and bottom walls of cap' 34 ofthe head of the frame.

Antifriction rollers

80 and 81 at opposite ends of slot 45, Fig. 10, bear against bars 42. and 77 respectively,.and form a kind of fulcrum-for the swinging of said bars as ey are alsov reciprocated longitudinally. Feed-bar 77 is reciprocated from needle-bar 42 by a bell-crank lever 82 pivoted, to bar 77 by a screw-stud 87 and having a long arm ,83-

formed with a nslot embracing a roller stud` on bar 42, and a short arm 84 slotted or forked to embrace a roller stud 86 fixed to the cap 34.

Upon reciprocation of they needle-bar 42#1 downward from v.itsposition in Fig. 10, its roller stud .85 travels downward in the slot of arm 83, swings said arm toward ,the right (Fig. 10), andby the action of arm'84v against fixed stud 86 reciprocates bar 77 downward through its pivotal connection 87 to the bell-crank'lever. The amplitudeof reciprocation ofthe feed-bar 77 is thus considerably less than that of the needle-bar 42 because the needle must travel further in penetrating the work and then rising clear of it than is required in engaging the feeddogs with and disengaging them from-the work.

bars in so swinging pivoting at their upper' ends between the

rollers

80 and 81. Rearward swing or feed-movement `is imparted to the bars through. a bell-crank lever 95 having a hub 92 (Fig. 12) embracing a fulcrum stud 93 on the wall of the head of the machine. A depending long arm of lever 95 has a right' angle extension ig.,6) carrying a roller 94 bearing against the flat side of needle-bar 42. A bent lever 96, Figs. 5,

6 12 andv 13, fulcrumed against a roller 97 is pivoted at one end to a shortarmof so v bell-crank lever 95 and at its other end cari ries a roller 8 bearing against a cam sur-v face 99 of vw eel 47. A blade spring 100, secured to lever 96 and at its free end engaging under hub 92 of lever` 95, exertsv its tension to always maintain lever 96 up in position-for its roller 98 to bear against the cam surface 99. ARotation of said cam crum roller 97 and actuating bell-crank lever,h i 95 to swing thel lower end thereof rearward towards the right in Fig.' 10,. or left in Figs.

11 and 12. vSuch swinging of leverl 95 with its roller 94 bearing against the needle-bar 42, swingsboth that bar and presser-bar 77 rearward in their feed stroke against the yielding resistance of spring 90 and with the feed-dogs vand needlejin engagement with the work. The amplitude of such backward nmovementI is dependent'upon the position of f fulcrum roller 97 with relation to the lever 96 and may be increased by shifting saidful-y crum roller 97 toward the upperendof said' shifting or adjustment, roller 97 is mounted atone end of a bell-crank lever 101 fulcrumed on a'stud 102 threaded in to the lwall of' machine head 33, Figs. llvand 12. 'A

lever 101 l (Fig. 13)v Vprojects through a curved slot 104 ofthe wall" of the head and then through a similar lslot in a gauge-plate flever,- or decreased bya shift in the other direction. Forthe accomplishment of such stem 103 threaded` intozthe other end ofv 105 secured tothe exterior of said wallby screws, Fig. 14. A block or `collar 106 is keyed on to the stem 103 and has teeth engaging transverse teeth or serrations of gauge-plate 105 to prevent slipping when the parts are set to a certain position' of adjustment. A coiled spring 107 on stem 103 is enclosed by a sleeve 108 also on said stem, with a nut 110 threaded on to the outer extremity of said stem and retaining all the parts in position thereon with the sprin 107 bearing at one end against the top wa of its chamber in sleeve 108 and at its other Iend against collar 106. Turning the nut 110 down tight, as shown in Fig. 13, compresses spring 107 until the sleeve 108 contacts collar 106 andthereby locks its teeth in engagement with teeth of plate 105, thus secur- .ing `bell-crank lever 101 and its fulcrum roller 97 against movement. To adjust the position of these parts the nut 110 is loosened, the sleeve 108 is moved out of engagement with collar 106 by expansion of spring 107, and the stem (carrying with it lever 101) may be moved to a new position of adjustment in' slot 104 the teeth on collar 106 riding over teeth on plate 105 under the yielding pressure of spring 107 against said collar. When the desired adjustment is attained the nut 110 is again tightened and the parts locked as in Fig. 13. When the low part of cam surface 99 comes under roller 98, as in Fig. 11, the spring 90 acts to swing the needle and feed-dogs'l (then elevated out of engagement with the work) and vtheir bars forward a distance equal to the length of one stitch, untilk such movement is arrested by bell-crank lever 95 com ing in contact with the felt tip of an adjustable stop-screw 111 threaded through the wall of head 33 and locked in the desired position of adjustment by a nut 112. Thus, the adjustment of` stop-screw 111 on the one hand, and of bell-crank lever 101 with its fulcrum roller 97 on the other hand, determine the limits of forward and backward movement of the feed-dogs and needle and thereby the length of-stitch formed, so that the length of stitch may be v'aied as desired by adjustment of said parts.

Presser-foot and opera-ting mechanism thcrefo1zDuring the feeding of the work on the feed stroke of the feed-dogs, there is little, if any, pressure exerted upon the work by the presser-foot, and thus no resistance or interference therefrom to the advance of the Work. But as soon as thel feed movement is completed the presser-foot begins to yieldingly press upon the work, such pressure reaching its maxlmum as the needle pierces the work to thereby resist any tendency of the needle to press the work into the opening of the throat plate and belouT the upper work supporting surface of said plate. The presser foot 115, best shown in Figs. 1 and 23, is of rectangular outline to occupy the rectangular space (Fig. 3) between the feed-dogs and 66, but somewhat shorter than said space to allow for the backward and forward movement of the feed-dogs with relation to the presser-foot which latter has only up and down movement. The foot is slightly upturned at its forward edge and has therethrough an approximately rectangular opening 116 of a width to accommodate a plurality of needles arranged side by Side and of a length suflicient to accommodate the backward and forward swinging of such needles in the feed and return movements thereof with the feeddogs as already explained. The shank or hub 117 of the presser-foot is longitudinally bored to receive the lower end of the bar 1.18 to which the presser-foot is clamped by a set-screw 119. Bar 118 extends upward through a bearing opening 120 in the bottom wall of the cap 34 and at its -upper end enters a telescoping tubular bar 121 which is vertically movable in a bearing opening in the hereinbefore mentioned boss 91 and a bearing'opening 122 of another inwardly projecting boss 123 at the top of the cover 34. A cap 124 screw-threaded into the upper end of bearing opening 122 has a central' ,perforation therethrough into which the spout of an oil can may be inserted to inject lubricant for lubricating the contacting surfaces of the tubular member and its upper bearing opening, some of the lubricant also finding its way down the outside of the sleeve to lubricate the bearing thereof in the boss 91. A perforation 125 through the upper end wall of the tubular bar 121 admits some of the lubricant to the interior thereof and thus lubricates the contacting surfaces of the two

bars

121 and 118 in the longitudinal sliding or telescoping movement thereof with relation to each other. `A pin 126 through the bar 118 working in slots at opposite sides of the tubular bar 121 prevents relative turning of the bars which might throw the presser-foot out of proper alinement. A coiled expansion spring 127 housed in the upper end of tubular bar 121 bears at its upper -end against the top wall of said bar and its lower end against the upper end surface of the lbar 118, tending constantly to move the bar 118 outward or downward in the tubular bar 121 to the limit of movement permitted by contact of the stop pin 126 with the ends of its slots in bar 121. A hub 'or sleeveat the inner end of an arm 128 surrounds tubular bar 121 and is Xed thereto by two set-screws (Fig. 10), said arm 128 projecting through a slot in the rear of the cap 34. An elongated upright slot at the outer end of arm 128 has therein an antifriction roller 129 j'ournaled on a pin bridging the slot. A rock-lever 130, Flgs. 5, 9 and 10,

lli

-Cil

has a forked end reaching into the aforesaid slot and embracing roller 129. A screw stud 131 (Figs 5 and 9) has thereon an antifriction roller 132 in a slot 133 of lever 130 thus constituting a fulcrum on which said lever may simultaneously rock and reciprocate longitudinally. The screw stud 131 is threaded at its inner end into a plate 134 which is fastened by screws (Fig. 9) to the rear wall of the head 33 over an opening through said wall. An angle lever 135 is pivoted at one end by a stud 136 (Figs. 2 and. 9) to the rear face of the head of the machine and at its other end is pivotall connected to one end of rock-lever 130. stud 137 projecting inwardly from lever 135 through a slot 138 in the rear wall of the machine head has at its inner end. a roller 139 (Fig. 5) engaging a cam groove 140 formed continuously about the surface of the wheel 47. In the rotation of the wheel said cam groove acts through the roller 139 and stud 137 to swing the lever 135 back and forth on its pivot 136, thereby imparting simultaneous rocking and reciprocating movement to the lever 130 on its fulcrum, the forked end of lever 130 thus moving up and down and imparting vertical reriprocatory movement to the tubular bar section 121 of the presser-bar throu h `the arm 128 fixed to said tubular bar. ownward movement of the tubular bar compresses the spring 127 (Fig. 10) against the upper end of the bar 118 and thus increases the pressure which the spring exerts upon the presser-foot, this action being so timed that the tubular bar is at the limit of its downward movement and the spring exerting its maximum pressure when the needle is in the act of piercing the work, thus preventing the needle from forcing the work downward into the opening provided in the throat plate ,to receive the point of the needles and to accommodate the backward movement thereof while projecting through the work. When the needle reaches the limit of its downward stroke through the work the cam groove 140 and the connections operated therefrom are timed to begin upward movement of the tubular bar 121 to gradually relax the pressure exerted by the spring 127 upon the presser-foot and hence by the foot upon the work until a minimum of pressure, or practically no pressure, is reached when the feed of the work begins, at which time the pinv 126 will contact the bottom of its slots (Fig. 10) and slightly lift the presser-foot out of engagement with the work. A coiled sprlng 141 connected between an arm 142 at the back of the top of the cover 34 and a lug on the arm 128 is extended by the downwardmovement of said arm actuated from the cam groove140 and o erating connections heretofore described. n the upward O r reverse movement said spring 141 imparts a lift through the arm 128 and thereby assists the action of the cam groove and its con nections.

The usual cam lever -143 pivoted in a slot in the rear wall of cover 34 cooperates with a lug of a collar 144 secured by a set-screw to the bar 118 to lift said bar and with it the presser-foot to elevate the latter from the work when it is desired to shift the work to bring the design thereof in proper relationshi to the needle or for other reason. Such lifting of the foot when the tubular bar 121 is at the limit of its upward movement, as shown in Fig. 10, elevates the pin 126 from the bottom of its slots as also shown in said figure. Since work is shifted only when the feed-dogs and the needle are at the limit of their upward movement and thus clear of the work (at which time the bar 121 is also up as shown in Fig. 10), it is unnecessary to provide any means for elevating said dogs and needle when the presser-foot is lifted by the cam lever 143 as shown in Figs. 2 and 10. In this machine when it is desired t0 entirely remove work from under the presser foot, feed-members,

- and needle, the work plate 145 about to be described should be lowered to afford ample clearance for withdrawal of the work and for introduction of new work.

Work-support or throat-plate and adjustng means maraa-145 is the work-plate or throat-plate having through its center a rectangular opening 146 beveled at its forward edge and of the same size as the opening 116 through the presser-foot, its width being suficient to accommodate the maximum number of needles the particular machine is capable of using, and its length suficient to accommodate the maximum forward and backward sidewise feeding movement of the needle or needles. Throat-plate 145 has a concentrically depending flange or hub 147 fitting in the upper end of a vertically movable tubular member 148 and secured in the desired position therein by two `oppositely positioned set-screws 149 only one of which is shown in the drawings in Fig. 20. The member 148 is movable vertically in the surrounding fixed tubular member f 150 which at its upper end is secured in an opening of a plate 151 the latter bein in turn secured by screws yto the upper sur aceV of the table 30arou11d an opening 156 thereof in and throu h which opening some of I the parts now being described arepositioned and project. A bottom plate 152 -is screwthreaded onto the lower end of tubular member 150. Four bolts 153 threaded through equidistant holes around the edge of plate 152 are adapted to be turned through said openings until the upper ends thereof bear against the bottom surface of the table 30 whereby the parts may be applied to tables of different thickness. A wood screw 154 through a central bore of each boltb 153 is longer than the bolt and enters the wood of the table and makes impossible lateral shifting ofthe connection to the' underside of the table. 155 is a worm-gear positioned in one side of the opening 156 through the table, said gear having an axle or shaft 157 journaled at its upper end in a socket in the under side of plate 151 and at its lower end in an opening through the plate 152, a crank handle 158 at the lower extremity .of said shaft serving to rotate it and the gear thereon. A collar 159 fixed by a set-screw on shaft 157 and bearing upon the top of plate 152 serves to hold the worm-gear and shaft up in proper position. A rack-bar 160 is secured by 'screws to the outer surface of the vertically adjustable tubular member 148, with the gear-teeth of the rack in. engagement with the wormgear, a slot 161 being formed in the tubular member 15() to accommodate the rack. As thus appears, the throat-plate 145 may be raised or lowered to any` desired position by rotation of. the crank handle 158 and is thereby given the required adjustment to conform to the particular work being performed andlength of loop which it is desired to project through the fabric by the needle or needles.

Automatic thread supply md control meckam'sm.-The stitch formation which this machine is designed to produce requires a free feeding or supplying of the thread to the needles on each down stroke thereof with practically no tension on the thread. To satisfy those conditions I provide means whereby, during each ascending movement of the needle ory needles when they are not consuming thread 'or exerting-pull thereon,

thread is pulled from t-he source of supply to provide an amount of slack thread sufficient for consumption of the needle in its next downward loop forming stroke. the operation of such means the thread is gripped at a point between the needles and the source of supply, and while so gripped a pull-off device acts upon the thread between the point at which it is gripped and.-

the sourceI of supply to pull` further ythread from such source and provide slack therein which is then made available to the needles on their down stroke by releasing the aforesaid grip upon the thread.

A plate 165 is applied to the top of the' machine frame or casing at the right hand end thereof over an opening 166 (Figs. 16 and 19) through the casing wall. Two

standards

167 and 168 rise from an angular base bar 169 which bears upon the plate 165 and borders two edges thereof. Screws 170, of which three are shown in Fig. 16, pass through thebase bar 169. plate 165 and into the wall of the 4machine casing to secure yhanging thread guides 179.

ldles when three needles are in use.

the parts in place.u A block 171 secured to Y the upper end of standard 167 (Fig. 2) has therethrough three thread-eyes or passages 172; anda similarblock 173 secured to the upper end of standard 168 (Fig. 16) has therethrough three thread-eyes or passages 174 in approximate alinement with the aforesaid thread eyes 172 respectively. An upvstanding long stroke lever 175 swings in the space between the

standards

167 and 168 and has therethrough three thread-eyes 176. 177v (Fig. 2) is a standard mounted on the table 30 and supporting a shelf 178, and at its upper end having three overreceptacles 180 are shown upon the shelf 178 in Figs. 1' and 2, leach receptacle having a cover.y Thread in ball or other suitable form placed in the three receptacles is led through a thread-eye centrally positioned in each of the receptacle covers, the three threads thence passing in turn through the .thread guides 179, thread-eyes 172 of block 171, thread-eyes 176 of lever 175, threadeyes 174 of block 173, through eyes in an upright thread-guide 181 at the middle of the neck 32 of the machine, through threadeyes positioned above the needle-bar in a thread guide 182 rising at an incline from the neck ofthe machine, thence downward Three thread through the' three longitudinal thread pasalso for gripping the thread during that operation, are as follows: The long stroke lever 175 and a short stroke lever 183 are fulcrumed side by side upon a short hori zontal shaft 184 between two

collars

185, 185 fixed on said shaft by set-screws. Shaft 184 is supported at opposite ends in openings in

lugs

186, 186 on the bottom of plate 165fand set-screws through said lugs clamp the ends of the shaft in the lugs. Lever 17 5 is forked at its lower end to embrace an eccentric 187 of considerable throw or Stroke, and lever 183 is similarly forked to embrace an eccentric 188 of short stroke or throw, both said eccentrics being secured to the main driveshaft 36 of the machine. tries the two levers extend upward through the opening 166 in the top wall of the machine and through an opening 189 in plate 165. At its uper end lever 183 bears against roller 190 journaled in a bridge piece 191 secured by screws (Fig. 18)- to a block or member 192 which is a movable From the eccen-f mate to the xed block 173 on the upperl end of standard 168 heretofore described. There are-a series of oppositely positioned-sockets preferably of circular cross-section in the adjacent edges of the blocks 173Iand 192. Thus there are three relatively shallow sockets 193 in the edge of block 173 which sockets are intersected by thefthreethreadeyes or passages 174, respectively;j Three deeper sockets 194 are correspondingly positioned in the opposingedge of bleek-4192.`

When. the threads are not being-gripped, that is when the two blocks are in separated or what may be termed open position, as

illustrated in full lines in Fig. 18, three cylindrical plungers 195 span the Aspace between the edges ofthe blocks, eachplunger projecting at its o posite ends into oneof the sockets 193, ang 194, having beenmoved to andy-being retainedv in such position by a coiledexpan-I sionqspring located in socket-194 about a stem 196 onthe plunger, said stem having a screw-threaded endprojecting through the end of the socket and carryingfa round milled edge nut threaded thereon'.`` 4In the edge of'block 192 there are alsovtwor relatively shallow sockets 197, 197.*

Witli'deeper sockets

198, 198 correspondingly positioned in the-edge of block 173. In the position of parts as shown in Fig. 18, two-,.barsf199, 199 f secured in the

sockets

197, 197 y.respectively by set-screws, span the spacebetween the edges of the bars -and project, into the

sockets

198, 198, respectively.' 'stem'200 on eachbar 199 extends'thrngh'the"correspondingsocket 198 and through, an open-I ing in the standard 168 attliejje'gnd of said socliret, the projecting screw-threaded end of sai each socket 198 and aroundeacli'stem 200,

`bears at one end against corresponding bar full line position shown Fig.j1v8,the twov springs 202 expand andmoreltll'e block 192 to follow the movement of the lever183, and thus hold the roller 190 in close contact with the lever during such I'nov'ementy and untilthe block 192 reaches the limit `of'lts movement determined by contact 'ofthe nuts 201, on the stems 200 with the outersurface of standard 168. l

The cam 188 is so shaped .andltiined in itsv action that during one-half',ofitsrotation" and While the needles are making a descending movement" and slack thread'to'supply such needle movement is vbj ein ZdrawnA through the thread-eyes 17 4-th`etwo blocks 173 and 192 remain separated or open substantially as shown in Fig- 18, vwith the plungers 195 lifted from -the bottoms lof` their sockets 193 and out of alinement `with a correspondingsocket stem carrying a milledffe'dge circular nut' 201. A co1led expansionaspring202 in.

the thread-eyes or passages 174 through the block 173. During the next succeeding uarter-rotation of the cam 188 it actuates t e lever 183 to move it from its full line position to its dotted line position in Fig. 18, and' thus moves the block 192 .to its closed position relative to the block 173, the plungers 195 passing further into the sockets 193 across the thread-eyes 174 and yieldingly pressing and gripping` each thread against the bottom of its socket 193 as best shown in Fig. 17. The parts are maintained in this closed or gripping position practically throughout the last quarter-rotation of the cam 188, and during this period the cam 187 actuates the arm- 175to swing its upper end from a position in approximate alinement with the thread-eyes 172 and 174, to the position in which said lever is shown in Fig. 16, thereby--while the threads are gripped by the plungers 195 as shown in Fig. 17-pullin thread from the source of supply thereo in the receptacles 180 through the thread-eyes 172. The cam 187 then swings the lever 175 in the reverse direction slacking the thread thus drawn from the source of supply through threadeyes 172 so that the same may be freely drawn forward by the needles in the downward movement thereof Without material tension or back pull upon the thread which iniglt tend to pull out the loops thereof just previously pro'ected through the fabric by the` needles. ny desired adjustment may beeiected by turning the nuts on the ends of'rods 200 and 196. AWith Such automatic in which it is obtainable on the market in its original package, ball, or spool, no re- Winding before use being required.

. It is to be understood that the invention is susceptible of other structural embodiments and that I do not limit myself to the particular embodiment and details of structure herein illustrated and described.v

1. In a. sewing or embroidering machine,

thecomloination of a Work support, a needlebar and feed-bar above the Work support, a tubular needle carried by said needle-bar and through the interior o f which thread orthe like is to be conducted and loops thereof projected by the needle through Work on the work support, means imparting to the needle-, bar and feed-bar endwise reciprocationtoward and from the Work and sidewise backward and forward movement, and a feed-'member'pivotally supported from said feed-bar for engagement with the upper surface of the Work on the work support.

2. In a sewing or embroidering machine, the combination of a work support, a needlebar A,and feed-bar above the work support, a tubular needle carried by said needle-bar and through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through work on the work support, means imparting to the needle-bar and feed-bar endwise reciprocation toward and from the work and sidewise backward and forward movement, and one or more work-engaging feed-members each yieldingly supported from the feed-bar to yieldingly engage and feed the work on the work support.

3. In a sewing or embroidering machine, the combination of a work support, a needlebar and feed-bar above the work support, a tubular needle carried by said'needle-bar and through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through work on the work support, means imparting to the needle-bar and feed-bar endwise reciprocation toward and from the work and sidewise backward and forward movement, and two work-engaging feed-members each yieldingly supported from the feed bar to yieldingly engage work of the same thickness or of diiferent thickness from that simultaneouslyIengaged by the other member.

4. the combination of awork support, a needlebar and feed-bar above the work support, a tubular needle carried by said needle-bar and through the interior of which thread or the like is to be conducted and loops thereof projected by the needleY through work on the work support, means imparting to the needle-bar and feed-bar endwise reciprocai ltion toward and from the work and side- -wise backward and forward movement, and

one or more work-engaging feed-members each yieldingly and pivotally supported from the feed-bar to yield and also rock on its pivot in engaging the work on the work support.

5. In a sewing or embroidering machine, the combination of a work support, a tubular needle through the interior o f which thread or the like is to be conducted and loops thereof projected by the needle through the work on the work support, means carrying and reciprocating said needle point downward to cause the same to engage and disengage the work, means for imparting sidewise backward and forward movement to said needle, two feed-members positioned to engage the upper surface of the work at opposite sides respectively of a medial line, means for imparting feed and return movement to said feed-members, and a presserl foot positioned to engage the work inthe space between said feed-members.

6. In a sewing vor embroidering machine, the combination of a work support, a tubular needle through the interior of which thread or the like is to be conducted and loops thereof projected by the vneedle n a sewing or embroidering machine,

through the workl on the Work support, means carrying and reciprocating said nneedle point downward to cause the same to4 'a presser-foot Ipositioned to engage the work in said-space etween the feed-members.

7. In a sewing or embroidering machine,

the combination of a Work support, a tubular needle through the interior of which thread lor the like is to be conducted and loops thereof projected by the needle through the work on the work support, means carrying and reciprocating said needle point downward to cause the same to penetrate' and withdraw from the work, means for imparting sidewise backward and forward movement to said needle, a feedmember for engaging the upper surface' of the work, a feed-bar, means for imparting` endwise reciprocation and sidewise backward and forward movement to said feedbar, and means connecting said feed-member to said feed-bar said means including aV yielding element through which the feed-bar applies pressure to press the feed-member into engagement with the work.

8. In a sewing or embroidering machine, the combination of a work support, a tubular needle through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through the Work on the work support, means carrying and reciprocating said needle point downward to cause the same to penetrate and withdraw from the workmeans for imparting sidewise backward and forward movement to said needle, two feedmembers for engaging the upper surface of the work, a feed-bar, means for imparting l endwise reciprooation and sidewise backward and forward movement to said feedbar, and means connecting said feed-members to said feed-bar said means including a separate yielding element for each feedmember through which the feed-bar applies pressure to press said member into engagement with the work.

9. In a sewing or embroideringmachine,

the combination of a work support, a tubu-` lar needle through the interior of which thread or the like is to be conducted and loops thereo-f projected by the needle through the work on the work support, means carrying and reciprocating said -needle point downward to cause the same to penetrate and withdraw from the Work,

means for imparting sidewise backward and forward movement to said needle., a feedbar and means actuatlng the same, a block .or plate member carried by said bar,` two loops thereof projected by the 'needlea through the work on the work support.

- means carrying and reciprocating said needle point downward to cause the same to penetrate and withdraw from the work` means for imparting sidewise backward and forward movement to. said needle, a. feedbar and means for actuating same, a block or plate member, an adjustable connection between said bar and block member, two feed-members adapted to engage the upper surface of the work, a stem. on each of said feed-members working in an uprightsocket in said block member, and a spring in each socket against which the stem therein seats and through which springs the feed-bar bv its movement yieldingly presses the feedmembers into engagement with the work.

11.. In a. sewing or embroidering machine` the combination of a tubular needle through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through the work, means for reciprocating said needle point downward said means being` adjustable to change the amplitude of reciprocation of the needle and length of loop projected thereby through the work, a work support, andmeans operable to change the elevation of said work support without turning the same wherebyr the position of the work support mav be adjusted with changes in the amplitude of reciprocation of the needle.

12. In a sewing or embroidering machine.

the combination of a tubular needle through` the interio-r of which thread or the like is to be conducted and loops thereof projected i bythe needle through the work, means for reciprocating said needle point downward said means being adjustable to change the amplitude of reciprocation of the needle and length of loop projected thereby through the work, a worksupport having an opening therein in which said needle is adapte-d to operate, and means operable to change the elevation of said work support without turning the `same whereby the position of the work support may be adjusted with changes in the amplitude of reciprocation of the needle.

13. In a sewing or embroidering machine, the combination of a tubular needle through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through the work, means for reciprocating said needle point downward said means being adjustable to change the amplitude of reciprocation of the needle and length of loop projected thereby through the work, a work support, and means including a gear and rack operable to change the elevation of said work support without turning the same whereby the position of the work suppo-rt may be adjusted with changes in the amplitude of reciprocation of the needle.

14. In a sewing or embroidering' machine, the combination of a tubular needle through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through the work, means for reciprocating said needle point downward said means being adjustable to change the amplitude of reciprocation of the needle and length of loop projected thereby through the wo-rk, a work support, a rack fixed to said work support, a gear meshing with said rack, and means operable to rotate said gear to change the eleva-tion of the work support.

15. Ina sewing or embroidering machine, the combination of a tubular needle through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through the work, means for reciprocating said needle point downward said means being adjustable to change the amplitude of reciprocation of the needle and length of loop projected thereby through the work, a work support having a depending support-member fixed thereto, a support in which said member is slidable up and down. and adjusting means operable to slide said member in said support and thereby change the elevation of the work support.

16. In a sewing or embroidering machine, the combination of a tubular needle through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through the" work, means. for reciprocating said needle point downward said means being adjustable to change the amplitude. of reciprocation of the needle and length of loop projected thereby through the work, a wor-k support having a depending support-member fixed thereto, a support in which said member is slidable up and down, a rack fixed to said member, a gear meshing with said rack, and means y:for rotating said the combination of a tubular needle through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through the work. means for reciprocating said needle point downward said means being adjustable to change the amphtude of reciprocation of' the needle and length of loop projected thereby through the work, awork support. a depending supportmember thereon, a fixed upright tubular slideway in which said member is slidable up and down, and adjusting means operable to move said member in its slideway ard thereby change the elevation of the work support.

18. In a sewing or embroidering machine, the combination of a tubular needle through the interior of which thread or the like is to be conducted and loops thereof projected by the needle through the work, means lfor reciproca-ting said needle point downward said means being adjustable to change the amplitude of reciprocation of the tneedle and length of loop projected thereby through the work, a Work support having a depending member fixed thereto, an upright tubular slideway in which said member is slidable up and down, top and bottom supporting plates to which said slideway is fixed, a rack on said dejiending` member, a gear meshing with said rack, and means operable to rotate said gear to slide said member in its slideway and thereby change the elevation of the work support. y

19. In a sewing or embroidering machine, the combination with stitch-forming mechanism to which thread is led from a source of supply said mechanism including a tubular needle through the interior of which the thread is to be conducted and loops thereof projected by the needle through Work and means actuating said needle` thread-gripping means including, two relatively movable members one of which has a socket through which the thread to be gripped passes, a plun er for said socket on the other member, a yieIding connection between said plunger and its member, and means automatically and alternately moving said members first together to cause said plunger of one member to yieldingly grip the thread in the socket of the other member and then apart to release said grip upon the thread, and automatically operating thread pulling means acting upon the thread between its source of supply and the thread-gripping means to pull thread from said source of supply when the thread is gripped by the gripping means and to render said thread available to the stitch-forming mechanism when the thread is released by the threadgripping means.

20. In a sewing or embroidering machine, the combination with stitch-forming mechanism to which thread is led from a source of supply said mechanism including a tubular needle through the interior of which the thread is to be conducted and loops thereof projected by the needle through work and means actuating said needle. thread-gripping means including two relatively movable members one of which has a socket through which the thread to be gripped passes. a plunger mounted in a socket of the other member, a coiled spring against which said plunger is seated in its socket, and means automatically moving said members towards each other to cause said plunger of one member to yieldingly grip the threadin the socket of the other member and then apart to release said grip upon the thread, and automatically operating thread pulling means acting upon the thread between its source of supply and the thread-gripping means to pull thread from said source of supply when the thread is gripped by the gripping means and to render said thread available to the stitch-forming mechanism when the thread is released by the threadgripping means.

In testimony whereof I have signed this specification.

WILLIAM H. BARNETT.