US1695680A - Sewing-machine needle-controlling mechanism - Google Patents

Description

l F. M.' CARD sEwING MACHINE NEEDLE GONTROLLING KEUBANIS Dec. 18, 1928.

' Filed Jan. 21, 1927-- ,s .Smets-shut 2 Dec. 1s, 192s. 1,695,680

` F. M. CARD SEWING MACHINE NEEDLE GONTROLLING HECHANISH' Filed Jan. 21. 1927 s lshqt's-shevet 3 IZJ vtwo-needle sewing 'machines and more' espe n' atk will renderingpne ofthe needles iiioperaf tive, during a definitel period of operation of the other needle. The primaryxobj ect of the ,Patented` Dec.` 1s, 1928.

y PATEN OFFICE? N FREDERIC ivi. CARD, or" BnIDGEPoi-ir, c o-Nniicriciir, l.Aussichten lTo, THE ysiivefiin MANU.l

racernaine'coifiiuiivinv .or Eiiizennfrii, NEW JEiisiiY, A coiiroiaAfrioNor NEW,A

` JERSEY.y

siiwiivsivinciiiiviiy iin-.EDLE no ifrno'nriiiie `iwin'ciL/iivisivi,

Application filed January 21,19%@ Yerial No. 162,609.

i This invention relates to improv'emeiits in cially to that classy of two-needle machines particularly adapted: yfor stitching vangular seams Vand in whichl meansare provided for present'invention is to increase the etliciency Y of sewing machines offthisfcharacter by renf:v dering` them more adaptable to produce op'- positely directed angular' seams andto that end the invention comprehends the provision of improved cont-rolling means for at will throwing eitherV needle of a two-needle machine out of operation and for maintaining the inoperative vneedle out of action-during a predetermined.period of operation of the continuously reciprocatedneedle. y

The present needle-bar controlling means: .Y

isin the nature of lan improvement on the controllin' mechanism disclosed in my prior patent application L.Serial No. 35,854, led

'June 9, 1925,i n which theoperation of a inano ually controlled means i'for throwing a needlebar out of' action" brings intok operation a counting` device automaticallyV determining the idle period of the `disconnected needle-bar withrespect to the reciprocations 'of the other needle-bar. .In the presentv improvement both needle-carrying bars are connected to their reciprocatingfnieans by disconnectible coupling elements `and al manually shiftable ldevice isinterposedin the train of connections. with said coupling elements for predetei'iiiining which needle-bar is shown out of action under manual control and later auto- -inatically reconnected Vwithits reciprocating nieans by the'counting` device. e

ln the accompanying drawings, Fig., 1 is a front elevation, partly in section, of a portion of the ovcrhanging braclrctfarm ofa two-needle sewing machine embodying the presentimprovements. `Fig. V2 vis a top plan view of a portion of the machine bracket-arm and ofthe parts carried thereby, showing the shifting device in position for manually dis connecting the left-hand"needle-bar. Fig.

is a'rear side Velevation offtheneedle-bar con- .trolling mechanism'friiounted on l the ,machine bracket-arm. Fig. 4 comprises detached perspective views of tlie'lower ends of theneedle bars and Vcarrier','including the needle-hold'.-y

inGf clainpsf. Fig. 5 comprises detacliedlper? speotive viewsnf the upper ends (of thence-y kthe line 7 7 of Fig. 1.

dle-barsand their carrier. Fig. 6 is substantially central section of'theacounting device. Fig. 7 `is a section.substantially 'on y Fig..8r ris a detailpers'pective view of the shifting device 4"for Adetermining which needle-bar is thrown ,out i 2, in which bracket-arm is ournaled the -ro- 1 tary' inain or needle-reciprocating shaft fAt its forward end,the shaftlcarries the usual crank-disk 4, connected by means of drawings,';there is illusa linlr 5 with a stud 6 projectinglaterally` from asplit collar 7-clamped bymeans of screws,l as 8, upon'. a needle-bar carrierl `9. The needlebar carrier 9 is iournaled for "endwisereciprocation in. suitable 'bearings pro# vided by an upper elongated'bushing l0 and a lowernbushing 11 fixed in alined apertures in the head 2. .ThercarrierQ is formed longitudinally thereof with", substantially rectan gul'ar grooves 12 in which/are slidinoly disy posed slab-'sided needle-bars 13'and'14`. 'Y

y,As illustrated more particularlyinFig. .Y f

`the inner or clamping surfacef'oftlie collar 7 is provided with clearancerecesses,y as 15, adjacent the rounded outer surfaces ofthe ,needle-barsl?) and 14 whereby theneed-lelln bafrsvareL free from the clamping action ofthe 'colla-r 7 upon the Vcarrier 9. Fitted to the lower end of each of the needle- bars 13 and 14 and secured'by screws, as 16, is the vertically V recessed shank-face 17. of a needle-,holder 18. Each needle-holder 18 is formed with a lat-- eral lug 19provided with a vertical aperture 2() for the lreception of the shank of aneedle 21,- seciired by a set-screw 22. The lugs 19 are disposed inthe grooves 712 of the needle-'carrier 9, while positionedat opposite sides rof the lug19 of each needle-holder are flanges 28, the flanges ofv the ytwo needlcholdersbeingcompleinental in' embracing the i A carrier 9. Secured byj the -fscrews ylfiupon eachk needle-holder is "the shank -2470f a thread-guidemember 25 projecting laterally from said vshank below the needle-holder soV kas to ybe Vdisposed 'directly in Aadyance'ofthe.`

needles. The members 25 are each provided Awith an open or self-threading'aperture '26 to receive the thread directedthereto `through y employed to cooperate with the needles in i the formation of stitches, no particular roten ence is herein made to this mechanism of the present machine.

By reference more particularly to Fig. 5, `it will be observed that the grooved portionot the needle-bar carrier 9 terminates a short dietence below the upper end of the carrier, thereby forming shoulders, as 29, and u flut tened exteneion which is provided with a transverse coupling-pin receiving aperture 31. @verlying tho shoulders 29 of the carrier 9, in the coupled position of the needlebars, are shoulders 3Q and 33 formed below the upper `ende oit the needle-hure` 13 und! 14 by enlarged headc 34 and 35 thereof having ltiet facce 36 and 37 disposed upon opposite sides of `the flattened carrier extension 30. The respective needle- bur heads 34 and 35 `are formed with apertured guideboeses 38 and 39 for coupling-pine 40 and 41 projieet` ing laterally from cou )ling-blocks 4:2 and 43. In order toV provide clearance for the bonnes 38 and 39, the bushing 10 ie provided at op posite sides thereof with longitudinal slots, as 44. I

The couplingfblock 42 ie slidingly disf posed opone vertical guide-pin 4:5 carried y a reciproca/telly slide-block 4G, said Slide, block 46 eing mounted in `a suitable underi cut guideway 47 provided in the forward portion 48 of n` counting-device supporting bracket 49. The bracket- 49 is secured by a screw 50 upon the bracket-arm 1 of the Ina? chine, being apertured to embrace the buehingV 10, the bracket. carrying the several ele lnents constituting the Stitch-counting device.

Both needlolmrifa` may he coupled to und uncoupled from the carrier l) by reciprocan Y tory movements derived in the one instance from a manually operated lever and in the other from the counting device. To this end, the clinic-block i6 is connected by menne4 of a link 51 With one end of a lever 52 pivotally mounted in a milled out slot 53 rovded in an upetanding lug 54 of the brac iet portion 4:3. The other end of the lever 52 is connected bynieansof a pivot-screw 55 with one end of a link 56 of which the opposite end car-` riot a rolleristucl 57 provided with anupper roller 5S and a. lower roller 59. The lower roller 59 is disposed in a groovcd guideway (S0 formed in a segment-lever (il centrally of the length of which dependen vertical fulcruin-pin 62, adaptedto'enter aeuitable `aI-ierture in thebrueket-pertion 48 and secured therein by a screw 63 to fperniit of horizontal swinging movements o the lever 6l.

The upper roller 58 1s spaced from the up- Vper sur ace of the link 56 to provide clearance for connecting the stud 57 with an apertuced end of a link l of which the opposite end carries .on ite under side a projecting roller-stud `of a roller also dispoeed in the guideway G() of the lever 6l. The rollerstud 65 affords a connecting medium between the link 64; and another link 67 pivotally scoured by means of a-sci'ow 68 upon one end ot' a lever 69 fulcrumefl intermediate its ends upon a screw secured upon the bracket? 49- Tbe other end of the lever 69 is connected by means of a short link 'Z1 with a Slidefbloc( 72 dieposed in anundercut guideWa- y 7,3 provided in the bracket 4&9, Carried` by the slide-block 72 is a vertical guide-pin 74 upon which is slidingl mounted the coupling block 43 for the right hand needle,

The guideway 6o of the segment-lever 61 is curved in opposite directions from the fulcrum pin 62, the rearward curve of the guidevvay being arcuate to a radius `cor-respondin to the link 56 while the forward curve o the guideu'a is arcuate to a radius corres )ending to the ink 67, whereby shifting o' the linkage'dascrbed from the position in Fig. 2 of the drawings to that of Fig. 8, or vice verse, may be effected in astationary position of theseginent-lever Gl. In order to shift the roller 5.9 of 'the linkage in the gudeivay of the lever 61, there is provided a manually operable lever 75 'secured upon the lower end of@ Vertical rock-shaft 76 jnurnaled in an apertured boss 7T formed on the bracket 49. Rigidly secured upon the upper end of the rock-shaft 76 is an `arm 78 of which the free end A rovided with a curved slot 79 entered by t ic. upper roller 58 of the stud 57. The hand-lever 75 projects forwardly beyond the bracket 49 and is horizontally shiftable between limits determined by spaced stoppins 8O depending from an auxiliary angle-bracket 81 secured by Screws, :is 82, upon the front side of the bracket 4:9. l'n order to insure that the lever 75 rctaino its left or righthand pof'itions lunder machine vil'iration, it is preferred to Oli IDU

ico

recesses in the under surface ofthe bracket 81 'Y ad'ucent the stop-pins T80. p Y

ltlis to be understood from the foregoing description that the lever 75 is not employedV for coupling or uncoupling the needlebznfa.

but merelv to shift the linkage to determine which meddle-bur will be'uncoupled from its actuating mechanism upon operation of the .ferre'd to. The actual'coupling or uncou'plingI action, therefore occurs vonly when the'seg-` ment-lever 61 isl'vibrated, it being apparentv v manually kcontrolled mechanisml described in my Vpri or patent application hereinbefore rej that the coupling-pin of the left-hand needle only will befshifteduupon vibrationv of the in 2 because in thatp'o'sition the rollerl0,`

stud coincides withthe axis of vibration of the lever y61.l Likewise, whenfthe 'hand- @lever is shifted to its extreme., right posisaid lever is provided witlra ball-joint connection with one end of apitinan `84'iof` which the opposite end is pivotally 'connected with theupper -end of a vibratory arm 85' fulcrumed. upona stud-screw"V86I threadedfinto' the bracket:49.fAfspringf87` connected at one end 4with'the'bracket 49, andjat'its other end' 'with the arm 85 A' functions yto 'yieldinglly hold said arm in position wherein the needlebarsare coupled with" `thefcarrier 9' for reciprocation therewith,the` movement of thek arm r8,5 into this position being limited by ranv adjustableV stop-screw 88fthreaded into a lug 89.1 upon the vbracket 49, The upper end of the arm4 8,5is`also connectedby means of a yielding linlr90witha" lever'91 adapted to be suitably yactuated `from arftreadl'ev (not shown) in a direction to swingfthe arm away from the stop-screw 881` e.,'to'uncvouple g either,

rier9l1 .4

`In order to predeterminethe number of reciprocations of the active needle-bargwhile fone of*A the needle-'bars V'fromv its-cartlie other or disconnected n-eedle-Ebaris idle,` y thereis employeda counting` device substan'- tiallyv as fullydisfclosed in my prior patent application Serial' No. 35,854. "This counting device operates yin:conjunction with the arm 85 from'tlie inner side of whiclip'rojects -a'latch-'pinA 92 overlying-the forward end' of y a latch-lever 93 in the stop-screw engaging position of'said arm 85; The latch-lever 93 pivotally mounted upon the bracket 49 Vby means of a screw 94 and the free end thereof is urged upwardly by a spring pressed plunger 95 engaging the under side ofthe lever 98.`

The latch-lever 931s formedatfits forward end with a'l'atching notch-,96 and rearward of said notch 96, 'saidlever provided with an inclined block 9'Z`whic`h may be adjusted. longitudinally of the,1 lever by manipulation of adjusted` Y y e y *Y i causesastep-by-step-advancejof*the freeen'd an adjusting screw 98 and secured in position by meansof a screw 99,y Y i dapted toenvagefthe upper surface of the wear-block'97 is atappet 100 secured by means 'of a' screw 101 upon a rock-shaft 102 j ournaled for oscillation Withinthebore 0f al sleeve 108 whichitself iscapable of rocking movements within a stationary bushinglOi' fixed in a'suitable aperture formed inthe',

sleeve 108'fisfan'indicator-disk105 through@ adjusting `member A106, having a manipulat-- ing lniob 107recessedto receive a `coil-spring n an aperture inlwhichextendsthe headed endk I ofthesha'ft'102, 'Spline'dgito the shaft 102 f adjacent the indicator-disk'lOis 'a tappeti' l j 108, 4fun-ctioning to yieldingly hold the mem-y berf106 in'rcontact with'the `dislri105L The adj ustingmembe'rlO carriesavpi'n 109 adaptedto enter anyone of a pluralityof graduated apertures 110 formed in the disl'105ythe selected aperture corresponding -to- 'the der:

respect ,tothe wear-block 97. f

ball-joint connection with the'upper endwof la pitman 112k ofi-'which the lower end is'provided with a strap 113 embracing anV eccentric; 114- upon the V"main-shaftv, whereby the rocker-arm' 111 is continuouslyQoscillated f j during theoperation of 'the-machine.` '-fPiv-;

o'tally 1noi'uitecl"`uponthelrocker-arm-111 is a 'pawl 115 adapted in its .operativeposition to len gage ,thev peripheral teeth of :a ratchetwhe-e111@ suita" ingly held against an adjustable stop-screw sired initial position of the: tappet 100 with;

v lyiixed" upon the sleeve 103; The ratchet-wheel 116 is under the action of kme f 119. While thepawl v is yieldinglyurged i -rby afwsp'rin'gf120 vcooperatively engage, the

teeth of the ratchet-wheel',fitis held out'of engagement'therewithfyin the coupled position of the needle-bars, by `the underlying 'j freeend `of a stop-pawl'121engaged by-'a pin 122 vprojecting yfrom th'e'innersideof the arm 185. 7 j j ln' t-he normal operationA of `'the machine, the: ,needle-bars are both coupled; for reciprocationl with the carrier 9 'and-the arm` 85 is n held against the stop-screw 88 by the spring 87.',whereby` the latch-pin 92 overlies and holdsV depressed the latch-lever 93, while fthe pawls'1`15 and 121 vareheld out ofengage-A 4ment with Athe ratchet-wheel asdcscribed, so

thatthe arm 111 rocks idly. f VVheni-it isY desired to makean angle seam, the lever 591 isV treadle-actuated `to swing the arm 85 away from the stop-screw88, Whereuponsaid arm 85 is locked in position by the engagement of the ylatch-pin 92 with Vthe not-chef the latch-` lever 98and thepawl`s1115,'121 arepermitted t'oengagethe ratchet-wheel'llf;v -The resulting intermittent rotation` of the ratchet-wheel of the tappeti 100'-unt`il it engages-the` wearblock`97 and depressesthe'latch-lever 93 to1 i ably mounted upon said carrier, shiftable l coupling elements.Y disconnectibly coupling the needle-bars with said carrier, an actuable member, shiftable means for selectively connecting said'member withv the couplingeler ments of either needle-bar, and means for operating said shiftable means independently of the operation of said member.

7 The combination'` with the actuating mechanism of a sewing' machine, of a pair of reciprocatoiy needle-bars, shiftable coupling elements disconnectibly couplingy the needle-bars withy said .actuatingmeclianisin` reciprocatory. needle-bars, shiftable couplingk elements disconnectibly coupling thejneedlebars with said actuating mechanism, a vibratory lever, links interposed between. said lever and each of said coupling elements, means for alternately shifting said-links to a. neutral position upon said lever ,to alternately shift the coupling elements upon actuation of said lever, and means forL actuating said lever.

9. The combination with the actuating mechanism of a sewing machine, of av pair of reciprocatory needle-bars, shiftable coupling elements disconnectibly coupling the-needlebars with said actuating mechanism, a vibratory lever, links interposed between ,said lever and each of said coupling elements, means for. at e will rendering either one oi` said links ei'ective to shift a coupling element upon ac- VVtuation of said lever, means for vmanually actuating said lever in one direction, and automatically acting means for actuating said lever in the opposite direction.

10. The combination with Vthe actuating` mechanism of a sewingr machine, of a pair of reciprocatory needle-bars, shiftable coupling elements disconnectibly coupling the needlebars with said actuating mechanism, a link 'operatively connected with each of said coupling elements, a vibratory double-armed segment-lever, a shiftable connection between 1 'the position of said arm.'V

naine to this specification.

` each of said linksand anarm of said segnientlever in a stationary position of said lever,

and means or'actuating said segment'lever.

,11. The combination with the actuating mechanism of'a sewing machine, of a pairy of reciprocatory needle-bars, 'shiftable coupling elements disconnectibly coupling the needle- `bars with-said actuating mechanism, a Ivibratory segment-lever, link connections. be-V tween said lever and said couplingelements,

.means for simultaneouslyv shifting oneV of said links connections to an active portion of andv the other link connection to a neutral position"` upon saidsegnient lever, and means for tuating said segment-lever.

12. In a sewino machinev the combination Y witha pairof reciprocatory needle-bars, and

actuating mechanism for said needle-bars f including a disconnectible coupling-element v for each needle-bar, of a segment-lever, separate connections between said lever andL each of said coupling-elementsv alternately shiftable to la neutral position upon said lever,;a

vvibratory arm, operative connectionsv between said arin and the segment-lever, manually operable means for' `actuatingthe `vii Vloratory armfin one direction to shift a cou-y pling element into uncoupled position, and'V ay stitch-counting device actingautomatically to effect a recoupling movement of said ele-` ment.l

13. In a .sewing machine, thecombination f with a pair of reciprocatory needle-bars, and actuating mechanism `for reciprocating said needle-bars, of means for disconnecting a needle-bar .from and reconnecting it with its actuating mechanism incl'udinga vibrato-ry arm,a latch-lever for 'holding said arm in pof sition to temporarily ymaintain a needle-bar disconnected from its actuating mechanism, a stitch-counting device automatically acting to unlatch-said arm to permit recoupling oithe needle-bar with its actuating mechanism,

and a .safety member connected with said latch-lever for rendering said stitch-counting device inoperative when Vsaid vibratory arm is Yunlatched from said lever, regardless oft In testimony *whereoi I have v,signed my v y niinnnnioii. CARD.

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