US2005673A - Sewing machine - Google Patents

Description

G. M. EAMES SEWING MACHINE June 18, 1935.

Filed Oct. 3, 1933 5 Sheets-Sheet 1 Geazye M Ewmes w .VQ/z'z MJ W G. M. EAMES June 18, 1935.

sEwING MACHINE 4 Filedoct. 3, 1933 5 Sheet's- Sheet 7 2 c M. EAMl-:s

SEWNCT MACHINE June 18, 1935.

Filed Oct. 3, 1933 5 Sheets-Sheet 3 George MEames G. M. EAMES 'sEwING MACHIN Filed Oct. 3, 1933 June 18, 1935.

5 Sheets-Sheet 4 'June 18, 1935. G, M EAMES 2,005,673

SEWING MACHINE Filed Oct. 3, 1933 5 Sheets-Sheet 5 71 George/Zimna Paented June 18, 1935 UNITED STATE'S sEWING MACHINE George M. Eames, Bri'dgeport, Cov'nn., assignorto The Singer Manufacturing Company, Elizabeth, N. J., a corpcration of New Jersey Applicaee October 3, 1938, serial No. 891,988

18 Claims.

This invention relates to improvements in sewing machines and more particularly in zigzagstitch sewing machines, although certain features of construction are adapted for employment in straightaway stitching machines.

The primary and general object of the present invention is tc provide a simply constructedand readily assembled zigzag-stitch Sewing machine adapted for domestic use, as well as for general manufacturing purposes. iect of this invention is to provide a needle-vibrating mechanism of simple construction, so arranged that the amplitude of needle-vibration may be readily Controlled and that the needlevibration may be discontinued to produce straightaway stitches in accurate alinement, whereby the sewing' machine is adapted for the ordinary purposes of domestic use and is equally capable of employment for embroidering. eyeletting, darning, etc. i

Another object of the invention is to provide for conveniently interchanging throat-plates of a sewing machine to better adapt a straightaway stitching machine for embroidering, darning, etc. The invention has also for itsA object to provide improved loop-taker and work-feeding mechanism for sewing machines.

With the above and other'more specific objects in view, the invention comprises the devices, combinations and arrangements of parts hereinafter described in connection with'the accom-' panying drawings which illustrate a preferredv embodiment of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art. I

In the drawings, Fig, 1 is a front sideelevation, partly in section, of a sewing machine representing a preferred embodiment of the present invention. Fig. 2 is a rear side elevation, partly in section, of the sewing machine, with the rear bracket-arm wall cover-plate removed. F'ig.v 3 is a bottom plan view of the sewing machine. Fig. fi is la front end elevation of the bracket-arm head, with the face-plate removed therefrorn, vand of the work-support. Pig. 5 is a Vertical section of a portion of the bracket-arm standard and of the machine bed-plate, taken transversely of the length of said bed-plate and illustrating the reverse feed actuating and controlling mechanism. Fig'. 6 represents a section of the front 'end portion of the machine bed-plate taken in the ver,- tical plane containing the loop-taker shaft. Fig. '7 represents a section of the front end portion of the machine bed-platetaken in the Vertical plane A more' specific ob-' containing the loop-taker actuating shaft. Fig.

S'represents a section of a portion of V the machine bracket-arm,V taken substantially in the horizontal plane containing the needle-bar vibrating cam-shaft. Fig. 9 represents a transverse section of' the machine bed-plate taken substantially on the line 9-9 of Fig. 3 and illustrating the feed-bar connections. Fig. 10 represents a fragmentary` section `of the bracket-arm standard taken substantially on the line Ill-H) of Fig. 1. Fig. 11 is a top plan View of the throat-plate as employed for zigzag stitching purposes. Fig. 12 is a top plan view of a feed-cover type of throatplate which may be interchangeably employed with the throat-plate illustrated in Fig. 11. Fig. 13 represents a longitudinal section of the feedcover type of throat-plate as applied to the machine bed-plate.

Referring to the drawings, the present improvements have been embodied in a sewing machine having a fiat bed-plate I, afording a worksupport, and from one end of which rises the hollow standard 2 of a bent bracket-'arm 3, overhanging the bed-plate and terminating in a head 4 closed at its outer end by a detachable face-plate 5. I

Rotatably journaled in suitable bearings provided in said bracket-arm 3 is a horizontally disposed main shaft 6, extending lengthwise of the bracket-arm and .carrying at one end a driving pulley 1. At its opposite end, the main shaft 6 carries a counter-balanced crank 8 .provided with acrank-pin 9 connected by a link `Hi with a take-up lever l! suitably fulcrumed within the hollow head 4. Pivotally journaled upon an offset portion of the Crank-pin 9 is a split sleeve |2 having depending and spaced ears 13 between which the upper end of a needle-bar reciprocatingilink |4 isI pivotally mounted for swinging movements about an axis transverse to the axis of the main shaft B. The lower end of said link M is similarly pivoted between .the upstanding spaced ears 15 of a sleeve 6 journaled upon a stud .H extending parallel to the main shaft S from a collar IB suitably secured upon a Vertically disposed needle-bar |9.

The needle-bar |9 carries at its lower end a needle EQ, andv is journaled forV endwise reciprocation in suitable bearings provided upon a vibratory gate 2|. The fiattened upper end of the gate 2| is dispoSed within the Vertically slotted lower end of a supporting-member 22 :adj'ustahly threaded vertically into the upper Wall of the bracket-arm head 4 and otherwise unsecured, said gate 2| being pivotally hung upon a screwstud 23 horizont'aliy spanning the slot in the supporting member 22 to provide for swin-ging movements of the gate 2| about a pivotal axis substantially transverse to the axis of rotation of the main shaft 5. The lower end of the gate 2| is slabbed to'provide opposed fiat Walls 24 slidably disposed between guide-walls 25 of a guideway formed by vertically slotting the lower `wall of the bracket-arm head 4 in a direction whereby the gate 2| is confined to swinging movements in a Vertical plane which, in the present case, also contains the axisof rotation of the main shaft 6 and, as'will hereinafter appear, 'isit'rans- Verse to the direction of feed of the' work past the needle. I i i VBy pivotally hanging the' vibratory 'gate 2| upon a supporting member 22 which is 'free to turn, said supportngA member'will automatically a'djust itself angularly to correctly position the fulcrum-axis of the gate 2| transversely of the gate guideway 25in the bracket-arm head, 'thereby facilitating manufacture as Well as assembly o of the'parts without binding. The needle-bar |9 is restrained against turning in thegate bearings therefor, inra manner wellknownin theV art, by a'split guide-111g 26 on the collar |8, which guidelug is slidably disposed in a Vertical guide-slot 21 provided in the gate 2|. VAsiwill be readily understood, the pivotal connections for the opposite ends ofl the needle-bar reciprocating link `|4 permit the link to aceommodate itself to the lateral movements of the needle-,ban

' Extending -horizontaliy vfrom the lower end i of the vibratory gate 2| in the guideway 25 is an arm 28 of which the free endV at the outside of the bracket-arm head carries a pivot-block 29. Embracing the piVot-block 29 is the forkedV end of a rock-arm depending from'the front end of a short Arock-shaft 3| disposed horizontally transverse to the main shaft 6 and'suitably journaled at the under side of the bracket-armfhead 4. Extending upwardly from the rock-shaftr3'l atthe rearward side of the head'4 is'a'rock-arm 32 of which the free end isconnected by `a pivot screw 33 topone end of a pitman 34 disposed horizontally and externaliy at the rearward -side i of the bracket-arm 3. The other end of thelpitman 34 has a fork or yoke 35 and extends throughl a s1ot= or opening 35 of a flange`38 at the outward sidev of the rear wall of the bracket-arm, said flange and a depressed portion V3' of the rearward wall of thefbracket-arm within said flange together providing a recess 31 housingv the yoked end of the pitman. It will therefore'be understood that the yoked end of the pitman is disposed externally rearwardly of the bracket-arm wall 3' constituting the bottom wall of the recess I 31. A cover-plate 39 is detachablysecured upon the flange 3d in any suitable manner to Vcomplete the housing of the yoked end of the pitman, but-providing for ready access thereto.

`The yoke 35 of the pitman 34 embraces a cam 40 disposed within the recess 31 and 'externally or Vrearwardly of the bracket-'arm wall 3', said` gear 41 upon the cam-shaft 42, whei'eby the lattel' is rotated at one half the speed of rotation of the main shaft. From the foregoing it will be understood that, during the operation of the inachine, the cam 40 Vibrates the pitman 34 laterally about the pivot screw 33 and that the needle performs one complete reciprocation for each direction of lateral throw of the pitman.

In order to translate 'the otherwise idle laterally vibratory movements of the pitman 54 into effective endwise reciprocatory movements, to thereby impart swinging movements to the needle-bar gate 2|, a guide-roller 48 is suitably secured upon the pitmanV at its inner side and ad- `jacent to the 'yoke 35. The guideroller 48 is received in a guideway 49 constituted by a rearwardly open slot formed in the outer or rearwardly exposed face of a guide-head 523 extending into a cavity 5| in the bottom Wall 3' of the recess 37. The guideway 49 is segmental, the center of curvature thereof in one position of the guide-head 50 lying in the pivotal axis of the pitman 34 afiorded by its pivotal connection 33 with the rock-arm 32.

The guide-head 5D has a hub 52 extending through an aperture 53 in the bottom wali of the bracket-arm cavity 5|, said hub being'seoured by a set-screw 54 upon an adjusting shaft 55 disposed parallel to the cam-shaft 42 and having Yits longitudinal axis in substantially the horizontal plane containing the axis of rotation of against the end of a bearing bushing 56 suitably secured in the front Wall of the bracket-arm 3 and affording a bearing for the adjusting shaft 55.` Secured by a screw 51 upon the adjusting shaft 55 at the front side of the bracket-arm is a manually operable member in the form of a hand-level' 58 provided in its bearing boss with Va segmental flange 59 which may be suitably graduated. Adjacent to the periphery of the graduated flange 59 is a pointer 60 constituted by an ear bent forwardly from the cover-plate 45, the latter being suitably apertured to receive the forwardly projecting end of the Vadjusting shaft 55. The throw of the hand-lever 58 is limited in one direction by a stop-screw 5| adjustably fixed in an apertured ear 52 of thecover-plate to looatethe guide-head 59 in its zero position,

i. e., to position the guide-head so that its curved 'i Movement of the' Lili the stop-screw 63, the guide-head is angularly adjusted into a position such that, during -the operation of the machine, Vthe travel of the guide-roller 48 vin the guideway leffects endwisereciprocation of the pitman 34, thereby imparting laterally vibratory movements to the needle-bar gate 2 A friction washer is preferably interposed between the hand-lever 58 and the cover-plate 45 to frictionally retain the guidehead 50 in any position into which it is angularly turned by manipulation of the hand-lever 58. o

' It will be evident to those skilled in the art that the described needle-vibrating mechanism is not only simple and sturdy in construction, but

that the parts thereof may be readilyassembled a'nd suitably timed. The disposition of the pitman actuating cam 40 and guide-head. 50 externally of the lbracket-arm, with the guideway 49 opening outwardly, provides for conveniently applying the pitman 34 thereto. Furthermore, the housing of the pitman actuating elements in the recesst3'l which is formed by the 'inwardly depressed bracket-arm wall 3' and the arm fiange 38 obviates undesirable projection of actuating mechanism and unsightly protuberances upon the bracket-arm. Nevertheless, ready access to said parts within the recess 31 is afforded by the removable cover-plate therefor; v

The usual spring Vdepressed presser-bar 66 is journaled for Vertical movement in the bracketarm head 4, said presser-bar detachably carrying atits lower end a presser-foot 61 'which may be of any suitable construction. The presser-bar may be manually raised, 'as by means .of a hand lifter lever 68, to lift the presser-foot above the work-support for insertion and removal of work.

Cooperating with the needle 20 below the worksupport is a loop-taker 69 of the horizontal-axis rotary hook type and of well-known construction, in which hook is journaled a thread-case 10 containing a bobbin or mass of under thread around which the needle-thread loops are'cast in theformation of lock-stitches. To better a'ccommodate Cooperation with the needle 20 in different paths of reciprocation of the latter, the loop-taker is supported for rotation in a Vertical plane parallel to the plane of needle-vibration, and toprovide for convenient replenishment of the `lower thread the loop-taker is arranged with its open side directed forwardly toward the front of the machine. With 'these objects in view, the loop-taker 69 is disposed rearwardly of the Vertical plane of needle-vibration and is secured upon a loop-taker shaft 1| extending horizontally rearwardly from the looptaker and with its axis of. rotation transverse to the plane of needle-vibration; The loop-taker shaft 'H is journaled in spaced bearing bushings 12 and 13 suitably fixed in lugs depending from the bed-plate I, a collar 14 fastened upon vthe shaft 1| between said bushings serving to restrain said shaft against endwise movement.

Carried by the loop-taker shaft 'H and disposed adjacent to the loop-taker 69 is a spiral driven gear 15 engaged by a spiral driving gear 16 carried by one end of a horizontal loop-taker actuating shaft TI disposed below and transversely of the loop-taker shaft 1|. The gears 15 and 16 are so'designed that the loop-taker shaft is rotated twice for each rotation of the'actuating or 'driving shaft T1. One end of the loop-taker actuating shaft 'll is rotatably journaled in a bearing bushing 18 fixed in a lug 19 depending from the bedplate I said bushing 18 projecting beyond the lug 19 into close proximity to the hub of the drivving gear 16. Adjacent to its other end, the looptaker actuating shaft 71 is suitably journaled in a bearing lug 80 depending from the bed-plate I, and carries a grooved belt pulley 8| connected by a clip-belt 82, within the arm standard 2, with a pulley 83 upon the main shaft 6. The shafts G and 11 rotate in one-to-one relationship. Because of the disposition of the spiral driving gear 16 below the driven gear 15, and the desoribed arrangement of the loop-taker, the loop-taker aotuating shaft 11 is spaced substantially below .the work-support and rearwardly of the median width thereof, i. e., the loop-takeractuating shaft is disposed rearwardly of a Vertical plane containing the ax-is of rotation of the main shaft 6.

way 99.

The loop-taker driving gears '15 and 16 are housed in a gear casing having a bearing boss 84 detachably secured by a screw 85 upon the bearing bushing 18, said casing having an annular wall 86 surrounding the driving gear 16 and providing a lubricant chamber 87 which is closed at its outer end by a detachable cover-plate 88. Integral with said casing and disposed above the Chamber 81 is a cylindrical band 89 surrounding the driven gear 15 and serving as a guard' therefor, the upper portion of the annular wall 86 of the casing (as shown in Fig. 6) being partly cut away to provide clearance for the intermeshing portions of said gears.

The present machine has a reverse feedmechanism adapted to advance the work, selectively in either of opposite directions, in a line transverse to the plane of needle-vibration. This feeding mechanism includes a feed-dog 90 of the lower four-motion type and Operating Within feed-slots 9| (Fig. 11) of a throat-plate 92 which may have a needle-aperture in the form of a slot 93 elongated in the direction of needle-vibration or, if preferred, may be in the form of the usual round ape'rture when the machine is employed for straightaway stitching. The throat-plate 92 comprises a combination of the usual slide-plate and throat-plate heretofore commonly employed and is so constructed and arranged as to be readily interchangeable with other throat-plates more partieularly adapted for special Operations such as for embroidering, darning, eyeletting, etc. For this purpose, the throat-plate 92 is formed with parallel side edges 94 merging into a rounded end 95 opposite to a straight-edge end 96 adapted to coincide with the front-end edge 01 of the worksupport I The work-support I is provided with an opening 98 corresponding to the described shape of but slightly smaller than the throatplate, said opening extending inwardly from the edge 91 of the work-support crosswise of the line of feed and exposing the loop-taker 69 and feeddog 90. Along the side edges and` rounded end of the opening 98, the work-support is provided in its upper face with an upwardly open recessed guideway 99 affording. a seat for and confining the throat-plate 92 against movement vin the plane Vthereof, excepting toward the work-support edge 91. Releasable looking means is provided to normally anchor the throat-plate against movement from operative position in the plane of the work-support, said looking means in the present instance consisting of a looking-pin 100 depending from the throat-plate at the rounded end thereof and adapt-ed to enter an aperture ll in the work-support. Suitably secured to the under side of the throat-plate 92, adjacent to the straight end 96 thereof, is a member m2 from which extend opposit/ely directed spring-wings |03 comprising underhung spring means adapted to slidably engage the beveled under side of the'work-support and yieldingly confine the throat-plate to sliding movements in the guide- By pressing upwardly against the under side of the throat-plate 92 adjacent to the feed-dog 90, the throat-plate mayA be tilted slightly upwardly against the yielding action of the spring-wings |03 to raise the rounded end 95 of said throat-plate suffiei'ently to withdraw the looking-pin |00 from the aperture IM and to clear the feed-dog 90. The throat-plate is now free to be slidably removed from l`the guideway 99 to provide for access to the loop-taker and feeddog and p primarily for substituting another .throat-plate'therefor. Itwill be observed that the present throat-plate expedient obviates' the necessity of removing securing screws therefor and'that the interchanging of'pthroat-plates is thereby facilitated as well as by combining the throat-plate and thetusual slide-plate heretofore commonly employed.

Figs. 12 and 13 of the drawings illustrate a substitute throat-plate li which is particularly adapted for embrodering and darning purposes. It will be observed that the throat-plate IM differs from the throat-plate 92 primarily in omitting the feed-slots of the latter, and in being formed with an annular raised portion m5 having a substantially central needle-aperture I06.

The raised portion M35 of the throat-plate serves as a cover for the feed-dog Q0, to provide for manually manipulating the work for embroidering or darning purposes.V Obviously, other substitute throat-plates may be employed, as for instance plates provided with eyelct-spurs. i

The feed-dog 90 overhangs the loop-taker B9 and extends laterally from one end of a feed-bar I'l of which the opposite endis pivotally secured to a feed-rocker comprising spaced upstanding arms Iand ISS of a horizontally disposed feedadvance rock-shaft VIII). The rock-shaft IIO is substantally parallel to the loop-taker actuating shaft TI, being i journaled beneath the worksupport i adjacent to the front edge thereof and 4 in suitable bearing lugs III andiIZ. The feedrocker portion IIQ' of the feed-advance rockshaft Il is bent upwardly from adjacent to the bearing lug III, said feed-rocher portion of the shaft IIO terminating at one side of a Vertical w plane containing the line of feed through the Ipivot-stud II is apertured transversely of its pivotal axis to slidably engage an upright guide o in the formV of a rod IIS secured at its opposite end; to spaced. ears IH bent laterally from a Vrocking frame II disposed entirely below the .horizontal plane of the work-support I. The rocking frame II!!V is secured upon a short rockshaft- I I9 to provide forisaid frame a fulorum axis passing transversely .through the guide-rod `at substantially the middle point of therlength of said rod, said rock-shaft IISV being journaled in suitable bearing lugs below the work-support I so as to be disposed in parallelism with the feedadvance rook-shaft Ii and at the side of Va vertical plane through the axis of the loop-taker actuating shaft 'I' oppositeto that of the rock- Vshaft VI IB. The rocking frame II- has a fork I embracinga cam or eccentric I2 I carried by the loop-taker actuating shaft 'H' toV impart the feedadvancing Vand return movements to the feed- `dog 90. i

The radius-bar IIII,v intermediate its ends, is provided with a laterally extending boss I22 to which is pivotally connected the lower end of a linkv I23 extending upwardly through an opening in the bed-plate I and into the bracket-arm standard 2.- Atits upper end, the link VI23 is pivotally connected to a'feed-adjustinglever I24 extending transversely of the 'standard v2 from rear'to front and being fulcrumed'upon a pivotscrew-|25 -inthe rear wall Vof said standard 2.

Thezfront end of the feed-adjusting'leverextends through a slot A126 in the front wall' of the 'standard 2 and is thre'aded-to receive a lnut or manipulating head I2'I. The head I2'I is socketed in its inner face to slidably receive a sleeve I28 within which is disposedt a. coil-spring I29 `reacting against the head |2'I 'and a Vtransverse web -I30 within the vsleeve |28. The inner end of] the sleeve I28 is partly cut away to provide vertically spaced guide-lugs I3| slidably disposed in a verticalslot 132 formed in a graduated segmentplate I33, said segment-plate being secured by screws 134 to a boss I upon the front wall of the arm-standard' 2. A pointer I38 is carried by the sleeve I28'toover1iethe graduations of the.

segment-plate I33. The frictionalengagement of 'the sleeve |28 with the front face offthe seg-VV a i ment-plate |33 permits of manually shifting the feed-adjusting 1ever1|24 vertically, but is effective to; hold said lever in adjusted 'position without requiring tightening of any securing ;nuts heretofore commonly employed. t

Secured by screws I3'I upon the feed-adjusting lever |24 within-the standard 2 is a block 133v carryingat one side thereof a projection I39 pro- Vided with a recess M0 of horizontal V-shape disposed in a Vertical plane inclined to the feedadjustingtlever I24 and Open tOward the front ofjthe vbracket-arm-'Adjustably entering the V-shaped recess M0 is the roundedend of a stop-screw MI threaded through the front wall of the arm-standardV 2 at anl inclination ,to the feed-adjusting lever `I24 and ,having a manipu- I lating head M2A at the outer side of the ai'm standard.`

From the foregoing description, it will be understood thatv in'the zero or median position of throwof the feed-adjusting lever, the axis ofthe radius-bar pivot-stud II5 coincides with the fulcrum-axis II9 of the rocking frame II8 and accordingly the feed-dog 90 is then stationary as to work-advancingmovements during the operation of the machine. Movement of the feedadjusting lever out of its zero position in either i direction is adjustably limited by the stop-screw MI, it being understood that inany set position of the stop-screw MI the feed-adjusting lever is definitely limited-to movements of equal extent in opposite directions from its .zero position. v`As the pivot-stud I IS ,of the radius barrl M is shifted either above or belowthe fulcrum-axis .I I!!` of the rocking frame llfllaccording to the direction of movement of the feed-'adjusting lever out of its zero position, it is apparent thatthedirection and amplitude of work-advancing moveinents of the feed-dog may be readily Controlled. o.

Rising and falling movements are imparted to the feed-dog90 from a'feed-lift cam'v M3 -carried by the loop-taker -actuating shaft 11 adjacent to the bed-plate lugt'I9, said cam M3 being 'embra/ced by the forked end of a rock-arm M4 extending forwardly from said cam. The other end w of the r-ock-arm I 44 is suitably secured upon a short feed-lift rock-shaft Mg journaled beneath the work-support I in parallelisrnwiththe feedadvance rock-shaft IIQ and between said-rocksha'ft IIO and the loop-taker actuating shaft TI. Extending rearwardly from thet'feed-lift rocki shaft M5, adjacent to the feed-bar IEI'I, is a feedof the machine, but very materially facilitates assembly and adjustment of the parts. Furthermore, the disposition of the feed-lift rock- shaft 1,45 at the same side of the loop-taker actuating shaft 'H as the feed-advance rock-shaft IIO provides for employing a comparatively short and therefore rigid feed-lift rock-arm M6 and a comparatively large feed-lift cam |43 upon the looptakerv shaft Ti, said large cam 443 minimizing inaccuracies due to wear and the short rock-arm I 46 insuring a positive unyielding lift of the feed bar. As will be evident, the described construction is particularly favorable in combination with the loop-taker mechanism described, because it permits of the disposition of the bearing lug 19 closel to the Vertical transverse plane containing the axis of rotation of the loop-taker shaft 'H thereby affording a firm support for the gear-carrying end of the shaft 'H and also pro- Viding supporting means for the gear casing secur-ed upon the bushing 19, all without interfering with the feeding mechanism and ready assembly of the parts. The location of the fulcrum shaft l|9 of the feed-actuating rocking frame U8 at the side of the shaft 11 opposite to the feed-advance rock-shaft I IB side thereof permits of employing a comparatively long radius bar ||4 which facilitates adjustment of thedirection and amplitude of feed-,advance `movement of the feed-dog. It will therefore be apparent that the present feeding mechanism is simple in construction and that it is particularly well adapted for employment in a machine having a loop-taker mechanism as hereinbefore described.

Having thus set forth the nature of the invention, what I claim herein is:-

1. A sewing machine having a hollow bracketarm terminating at its free end in a head, a vibratory needle-bar gate mounted in'said bracketarm head, a yoked pitman disposed externally at the rear side of said bracket-arm and extending toward said head, operative connections between said pitman and needlebar gate including a pivotal support for the end of the pitman adpacent to said head, a camdisposed-externally of the rear wall of said bracket-arm in operative engagement with a yoke at the other end of said pitman to impart lateral vibratory movements thereto about said pivotalsupport; a rotary shaft disposed crosswise of said bracket-arm and carrying said cam, means for rotating' said shaft, and means for translating the lateral vibratory movements of the pitman into endwise needlebar vibrating movements including, Va pitmanguidedisposed externally of the rear wall of the bracket-arm, and a manually operable adjusting member at the front side of said bracket-arm operatively connected to'said pitman guide.

2. Asewing machine having a hollow bracket- .arm terminating at its free end in a head, a vibratory needle-bar gate mounted in said bracket-arm head, a yoked pitman disposed externally at the rear sideof said bracket-arm and extendingtoward said head, operative connections between saidpitman and needle-bargate including a pivotal support for the end of the pitman adjacent to said head, a cam disposed at the rear side of said bracket-arm in operative engagement with a yoke at the other end of said pitman to impart lateral vibratory movements Cthereto about said lpivotal support, a rotary shaft disposed crosswise of said bracket-arm and carrying said cam, means for rotating said shaft, and means for translating the lateralvibratory movements of the pitman into endwise needle-bar gate vibrating movements including, an angularly adjustable guide-head disposed at the rear side of said bracket-arm engaged by said pitman, an adjusting shaft journaled in said bracket-arm substantially parallel to the cam shaft and carrying said guide-head, and a manually operable member carried by said adjusting shaft at the) front side of said bracket-arm.

3. A sewing machine having a hollow bracketarm terminating at its free end in a head, a vibratory needle-bar gate mounted vinv said bracket-arm head, a yoked pitman disposed externally at the rear side of said bracket-arm and extending toward said head, operative connections between said pitman and-nevedle-barV gate including a pivotal supportfor the end of the pitman adjacent toV said head, a cam disposed at the rear side of said bracket-arm in operative engagement with a yoke at the other end of said pitman to impart lateral Vibratory movements thereto about said pivotal support, a rotary shaft disposed crosswise of said bracket-arm and carrying said cam, means for rotating said shaft, and means fortranslating the lateral vibratory movements of the pitman into endwise'needlebar gate vibrating movements including, an angularly adjustable guide-head disposed at the rear side of saidbracket-arm and provided with a ,segmental guide-way having the axisl of pivotal support of the pitman as its center of curvature, a pitman carried member engaging said guideway, and manually operable 'means for angularly adjusting said guide-head. H v i 4.V A sewing machine havingra hollowbracketarm terminating at its free end in a head, a vibratory needle-bar gate mounted, in said bracket-arm head, a yoked pitman disposed externally at the rear side of said bracket-arm and extending toward said head, operative connections between said pitman and needle-bar gate including a pivotal support for the end of the pitman adjacent to said head, a cam` disposed at the rear side of said'bracketarm in operative engagementwith a yoke at the other end ofsaid pitman to impartlateral vibratory movements thereto about said pivotal support, a rotary shaft disposed crosswise of said bracketarm and carryingV said cam, means for rotating said shaft, and meansV for translating the lateral Vibratory movements of the pitman into endwise needle-bar gate vibrating movements including, an vangularly adjustable guide-head disposed at the rear side of said bracket-arm, said guidehead being provided at its exposed side with a guideway engaged by said pitman, and manually with a yoke at the other end of said pitman to impart Vlateral vibratory movements thereto about .said pivotal support, a rotary shaft disposed crosswise of said bracket-arm andcarrying said cam, means for rotating said shaft, and means for translating the lateral vibratory movements of the pitmanv into endwise 'needle-Lbargate-vi-L brating movements including, van angularly adjustable guide-head disposed at the rear side of= said bracket-arm and provided with a 'segmentally'curved guide-s1ot-,7a-stud carried by said pitman and disposed in saidv guide-plot, an adjust'ing'shaft journaled ingsaid -bracket-arm substantially parallel tor` the cam shaft and' carrying said guide-head, and a manually operable memberoarried by said adjustingshaft at the front side of said bracket-arm;

6.- A sewingmachine-having a hollow bracketa armlterminating at its-"free end in a head, a vibratory needle-bar gate'mountedin said bracket-armhead, a Vyoked pitman disposed externally at the rear siderof said bracket-arm and extending toward said head; operative connections betvveen'said pitman'and needle-bar gate including' apivotal support for the'endf of* the pitman adj'acent'to said head, a camdisposed at the rear side of said braclzet-arm in operative engag'ement with a yoke at the other end of' said pitman to impart lateral vibratoryV movements thereto "about said pivotaL-support, a rotary shaft disposed crosswise of said bracket-arm and carrying said cam, means for rotating said i'shaft, and means 'for translating the'lateral vibratory movements of "the, pitmanjint'o endwise needle-bar gate vibrating `movements including, anangularly adjustabl'eV guide-head dis-posed at the rear side of said bracket-arm, said guide-head having at its rear outer side a vertically-disposed segmentally curved guide-slot, a stud carried bysaid pitman and disposed inl said guide-slot, an adjusting shagfti journaled in'said bracket-arm substantially parallel to the cam-shaft and'carrying said guide-head, and a manually operable member carried by said'adjusting shaft at the front side ofsaid bracket-arm.

'7,' A sewing machine having' a hollow Vbent i brack'et-armformedwith a recess 'in its rear wall adjacent the vbend in said bra'cket-arm, a mainshaft journaledghorizontally in said bracket-arm,

a rotary cross-,shaft journaled in said bracket'- arm vand geared to be driven by the Vmain-shaft at half Vthe speed of the latter, said cross-'shaft having a camfixed to its rearward endat the Vouter side of said abracketarmand'within said recess, a manually operable* oscillatory' adjnsting shaft j'ournaledin said bracket-arm` in parallelism'withsaid rotary cross-shaft and projecting at its forward endl through the front wall of said bracket-arm, a guide-head formed with a rearwardly open guide-slotzfixed to the rearward end of said adjustingishaft at'the outer side of 'said bracket-arm Within said recess, a removable cover-'plate closing said recess, a yoked pitman embracing said cam and having a guide-Stud disposedzin the slot of said guide-head, said pitman extending under said cover-plate andfthence extjernally and in rear of the bracket-arm toward the'free end of the latter, and a vibratory needlebar gate connected to be actuated by said pitman.

8.7121 a needle-barV vibrating mechanism for isewing machines, the combination with a hollow having a yole extending under said cover-plate through'the slot of said'recess, an actuating shaft;

and means connected to said actuating shaftforf.

Operating said pitman, said means comprising a;

rotary cam embraced by the yoked end of saidl pitman, a guide-headV having a rearwardly open guide-slot engaged by said pitmanand concealed'A by said cover-plate, an adjustable cross-'shaft carrying said guide-head and projecting through the front wall of the bracket-arm, and a manually operable member secured to the front end of` said of said cross-shaft and'housed'iwithin said recess o of thebracket-arm, an angularly "adjustable' guide-head'extendin'g into the cavity in said depressed wall of the bracket-arm, said'guide-head' being provided' at its exp'osed rearward side With a guideway; a'removable cover-plate closing said recess,v a yoked pitman embracing said'cam and engagin'g'said guideway, said pitman extending' under said cover-plate'and thence externally' and z in `rear of the bracket-arm toward the free end of the 1atter,` and a vibratory n'eedle-bar gate connected to befiactuated by said pitman.

10.'A1 sewing vmachine having a braoket-arm provided With housin'g-recesses in the outer faces of the frontl and rear walls thereof, removable cover-plates for said recesses, a rotary actuatingshaft journaled in said bracket-arm, a rotary cross-shaft journaled in the front'and rear Walls of said bracket-arm and geared to befdrivenby said actuating shaft, said cross-shaft extending at its opposite ends into said recesses, a shaftpositioning member carried by said cross-shaft and housed within the front wallrrecess of the bracket-arm, a cam carried by 'said' cross-shaft z 111. A sewingmachine'having a bracket-arm, a

rotary actuating shaft journaled in saidbracketarm, a rotary *cam-shaft' journaled in said Vbracket-arm extending [transversely of and ,geared to be driven by said actuating shaft, a

flanged cam carried'by said cam-shaft e'xternally of the rear wall of said bracket-arm, a pitman having a yoke embracing said cam and deriving laterally vibratory movements therefrom, said against movement in one direction axlally of 'said cam-shaft, means including a pitman-guide for translating the laterally vibratory movements of lsaid pitman into endwisre reciprocatory move- Vments thereof, and a vibratory needle-bar gate 'connected to be actuated by said'pitman.v

12.v A sewing machine having a bracket-arm provided in the front wall thereof with a recess, a

pitman being confined by the flange of said cam rotary actuating shaft journaled in said bracketarm, a rotary cam-shaft journaled in said bracket-arm extending transversely of and geared to be driven by said aetuating shaft, a collar carried by said cam-shaft within said front wall recess of the bracket-arm, a cam carried by said cam-shaft, a pitman having a yoke embracing said cam and deriving laterally vibratory movements therefrom, an angularly adjustable pitman-guide for translating the laterally Vibratory movements of said pitman into endwise reciprocatory movements thereof, a Vibratory needle-bar gate, connections for transmitting the endwise reciprocatory movements of the pitman to said gate, an adjusting shaft for Said pitman-guide, said adjusting shaft being ,journaled in said bracket-arm in parallelism to said cam-shaft, a hand lever carried by said adjusting shaft at the front side of said bracket-arm and provided With a graduated segment, a coverplate for said bracket-arm recess removably secured upon the bracket-arm, said cover-plate carrying an indicating pointer adjacent to the graduated segment of said lever,l and opposed stop screws adjustably carried by said coverplate to limit movement of said hand-lever in opposite directions. v

13. In a sewing machine, a bracket-arm, a supporting member mounted in said bracket-arm for turning movement, a pendulous needle-bar gate hung upon said supporting member for swinging movements about an axis transverse to the axis of turning movement of the supporting member, stationary guide Walls spaced from said supportingmember for directionally controlling said swinging movements of the needle-bar gate, and means for imparting swinging movements to said gate. o

14. In a sewing machine, a bracket-arm, a supporting member mounted in said bracketarm for angular adjustment about an axis, a pendulous needle-bar gate hung upon said supporting member for swinging movements about an axis transverse to the axis of angular adjustment of said supporting member, and guiding means for said gate controlling angular adjustment of said supporting member to thereby accurately position the pivotal axis of said gate.

15. In a sewing machine, a bracket-arm, a supporting member adjustably threaded into said bracket-arm, a pendulous needle-bar gate hung at its upper end upon said supporting member for swinging movements about an axis transverse to the direction of the length of said supporting member, guiding means below said supporting member for said needle-bar gate, and means for imparting swinging movements to said gate. i

16. In a sewing machine, a horizontally disposed work-support, a bracket-arm oyerhanging said work-support, a supporting member adjustably threaded Vertically into said bracket-armA and free to turn about a substantially Vertical axis, a pendulous needle-bar gate hung at its,

upper end upon said supporting member for svvinging movements about a substantially horizontal axis, guiding means for directionally controlling said swinging movements of the needlebar gate, and means for imparting swinging movements to said gate.

1'7. In a sewing machine, a bracket-arm terminating at its free end in a head formed With a Vertical guide-slot, a Vertically slotted supporting-member mounted in said head for turning movement about a Vertical axis, a pendulous needle-bar gate pivotally mounted in the slot of said supporting member and slidably disposed in said guide-slot, and means for imparting swinging movements to said gate.

18. In a sewing machine, a bracket-arm terminating at its free end in a head, a supporting member adjustably threaded into said head, a pendulous needle-bar gate pivotally hung upon said supporting member for swinging movements about an axis transverse to the thread axis of said supporting member, means restraining said supporting member against turning movement, and means for imparting swinging movements to said gate. v

GEORGE M. EAMES.

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