US1050359A - Overseaming sewing-machine. - Google Patents

Description

C. F. GRA.

nvmmmmme Smm@ Mmmm.

APPL-VGATXON FILED JUNE 11, 1909, 190562,35@a Patent-ed Jan. 14, 1913.

2 SHEETSASHEET 1.

INI/ENTUH ATTORNE Y C. F. GRAY.

OVERSBAMING SEWING MACHINE.

APPLICATION FILED JUNE l1, 1909;

Patented Jan. 14, 1913.

2 SHEETS--SHEET 2.

VVE/WOR@ A7 ORA/EY WITNESSES:

@istria-p sTATEsPA-TENT: oFFrCE;

CHARLES FREDERICK GRAY, or' SIERRA MADRE, CALIFORNA, Assrert'on '.r'o smerig MANUFACTURING CQMPANSL A .CORPORATION oF -NEW 'JERSEY'.

f OVERSEAMING sEWmGfMACHINE.

Specification o fLetters Patent.

i To all winmmy concern.'

Y ticularlito machines for' producing a con-- tinuous seam composed of sections. of.

it, known that I, CHARLES F. GRAY, a

citizen' of t-lie `United States. residing at- Sierra- Madre, in the county of Los Angeles and State of California', have inventedg'cer# tain new and useful Improvements in Overseaming Sewing-.alachinea of' vwhich the following'is a specification, reference being had therein .to the accompanyingdrawings.

This invent-ion'- relates to animprovement in= overseaiiiingr sewing machines. and parstraight-awaav and zigzag stitching, such as -is commonlyA employed ii'i closing shoe nppers, stitching:T patcli'pockets" to garments andl performing 'various operations upon overalls and certain other articles of'clotliing.

In'seams consisting'of combined straightaivay fand zigzag portions. itis desirable to vary the degree ot tightness of the stitches to'ena'blethe liiaterial at. the more loosely stitched zigzag portion. to be opened out fiat. The object of the` present. invention is to facilitate this and also to facilitate the making 'of a., zigzag seam composed `o i 'stitches of different degrees of. tightness where desired at dieientparts.

The" invention consists essentially in a stitch-finger adapted for vintroduction within the, range of action of the. stitch-forniing mechanism' for receiving andsupporting i the overseain stitches, 'and means operable While -the machine., is in motion for throwing'said stiteh-tingei'- into or out of such operativeposition: :ind it includes. more ging .needle; and it is shown in tliegaccom- 'panying drawings applied to Aa Singer No.

1 07-W-2- machine forming the subject off" my Patent No. 933,032, dated -Augiist` 31,

' `While the vpresent invention-is not' directed specifically to general constructive features of- ,the machine as regards the niechanism" for producing and changing the character of the stitches, itis in the present embodiment so related to this mechanism that a'des'cription and illust-ration ofthe entire machine Awill befound useful in setting forth the present improvement.

I n the accompanying drawings, Figure 1 is a front side elevationof a machine embodying the present improvements, .and Fig. 2 a sectional planfview of the same taken partly through the axis of the mainsliaft and partly through that of thecamshaft and controllin?,` rock-shaft Fig. 3 is a detail elevation of the needlejogging devices. Fig. t is a rear side 'eleva-tion of the4 ratented;mn.14, iaieg machine and Fifi'. 5 a similar elevation` showing,r the 'jog-control]ingineclianism in a differentposition.` Fig. (i is a plan of the elbow-lever cariving the stitch-fingerwith eertain of the. coi'iiwratinigparts of the ma.- cliine. Fig. 7 lis ali-elevation of t-lielower portion of the cani-rodaud the-.cam for controlling` t-lie position of the stitelrlingcr.

Fig. S is aperspective view of the presser# foot. with a portion of the `same' broken out tocxpose the. .stitchdingein which is reprevsented in operative relation t-l'iei'ewith.

',lhe. machine is constructed with the usual bed-plate l with overhangiing'bracket-arm l upon the head 3 of which is disposedthc horizontal firlcrum-stud -.l-. upon which is joiirnalcd `the sivingilng1r needlc-har frame provided lin its lower portion 'with a transverse slot. t' to rcceivetjlie headed 'fnid'e-st-nd 'T' olion 'the 'lower member of the head- 3 of the ln'm'kct-arin.

Y lln the lateral hearing members 8- of the needic-har trame Ii is' Ajonrnaled'.the vertically reciprocating needle-bar 9 Cari-ying the. needle l0 and provided with the i.\'cd collar 'll carrying:r a .sind embraced by one end of the pitman 1. whose opposite. end vembraces av crank-pin upon the crank-platel 13 ixed upon t-lie forward vend of the main-shaft 14 which is fournaled as usual in the bracketarm and rovided at its rearward end with the balanc-wheel 15.

The needle coperates with the rotary Alock-stitch hook 16 mounted upon the transverse shaft 17 connected by suitable gearing with the longitudinal shaft 18 'mounted 1 cam-shaft 23 which is thus rotated at onehalf the speed of the main-shaft.. The camshaft carries the :so-called triangular cam 24 which is embraced by the parallel mem- ]bers 25 of a yoke 26 formed at the forward end of a link-bar 27 pivotally connected at,

its rearward end by means of the screw-pin 28 'with a, lug 5* upon the needle-frame 5.

.As will be observed, the link-bar 27 receives vibratory movements upon its pivotal connection 28 from the actuat-ing canr24, but is free to move endwise in relationto said cam. In order that the sidewiseactuation imparted by the cam may be partially converted into endwise movement, the linkbar is provided adjacent its yoke 26 with a controlling stud 29 which is provided with suitable guiding means for determining its path of movement. A Y

As herein shown, the guiding means comvprises the swinging link 30, one end of which embraces the controlling stud 29 of -the link-bar 27 andthe other end embraces a fulcrum-stud 31 carried by lateral arm 32 fixed upon the transverse rock-shaft 33 journaled in the rearward side of the bracket-arm parallel with the cam-shaft 23. The rock-shaft 33 is disposed slightly below and forwardly of the cam-shaft 23, and in such position thatits axis is at. substantially 'the same level, and preferably coincident with that of the controlling stud. 29 when the link-bar 27 is in its extreme lower position. A

The vcontrolling rock-shaft 33 has fixed upon its rearward end the lateral crank-arm 34 forked at its'outer end to embrace a pin 35 upon the forward end of -a lever 36 fulcrumedy upon the fixed stud 37' upon the bracket-arm and formed in its .lower sideA with a socket 38 entered by the upper threaded end of' a push-rod 39 provided Y with a thrust-nut 40 between which and the guiding boss' 41 of the bracket-arm is interposed a spring 42 by meansof which the arm 36, and consequently the arm 34, is yieldingly maintained in raised position. The crank-arm 34 is provided with a lug 43 having an eye in which is hooked the upper end of the treadle-rod 44, adapted for drawingsuch arm downwardly to rock the shaft 33 in opposition to the spring 42. When the arm 34 is in.its normal or upper position, as represented in Fig. 4, the fulcrunr stud 31 for the swinging link 30 is disposed upon an imaginary line joiningftlie centers of the shaft 23 and pivotal screw-pin 28, so that the vibration ofthe link-bar 27 carries the controllingI stud 29 across such line atsubsta-ntially right angles, and hence it receives no endwise motion through the Iguiding link 30; but when the arm 34 is drawn downwardly into the position represented in Fig. 5, the rocking of the shaft 33 carries the fulcrum-stud 31 above such imaginary line, whereby t-he link 30 is caused to swing ,across said line obliquely, thus producing an endwise movement of the link-bar 27 in addition to its uniform sidewise movement, this endwise Amovementbe -a diametrical groove or recess with abrupt side walls to form stop-shoulders' 46 and with laterally andA outwardly inclined 'ends 47 convergent with the beveled edge portions 48 ofthe cam-disk whose outer periphery is otherwise cylindrical so as to'atford externally of said recess segmental stop-- shoulders circularly coextensive with the.

shoulders A46. The lever arm 34 carries upon its front face a stud 49 which, in the normal elevated position of the arm 34 represented in Fig. 4, is disposed substantially concentric with the vcam-disk 45, and extends with` -in the transverse groove or recess therein.l

The cam-disk 45 is so setupon the shaft23 in relation to the actuating cam 24 that when the yoke 26 first reaches the limit' of its extreme upper 4or lower throw, anid the needle y is rising and its point is a little above the work, the cam-groove is substantiallyyertical so as to permit the descent of the locking stud 49 from normal concentric position with the crank-'arm 34; but as the cam-shaft continues to rotate and the needle rises to its highest posit-ion, the vcam-groove is brought into varying angular relations with the circular path of movement of the stud 49 upon the .crank-arm34 and serves to restrain the movement of the latter by one of its segmental stop-shoulders 46 until `the cam-disk has made substantially a semi-rotation-'and the transverse cam-groove again assumes a substantially1 vertical position as the yoke 26 attains its opposite extreme position,and thel point of thevneedle is again above the work and rising to extreme elevated position, when the stud 49 isagain free to move downwardly with its supporting arm 34 in shifting thev fuIcrum-stud 31' rio effecting the, change between strai httiiive y and zigzag stitching conditions. l len ilie. yielding'cam-disk 45 is` in releasing posit-loir as indicated in Fig. 4', the drawing down of they lever-arm 34 causes the stud @din its descent to engage the inclined end portion 47 of the cam-groove, thereby causing the thrusting aside of theyielding camdisk, but the continued descent of the stud past the transverse cam-rib afforded by the /convergently beveled cam-portions 47 and.

48 permits the cam to return under the action of its spring into its normal position, the stop-shoulder afforded by the angular edge of the cam-disk locking the stud 49 in its lower position and preventing the return of the arm 34 to initial straight-.away stitching position until the treadle-rod 44 is released by the operator and one of the external bevelsr 48 is presented to the stud 49, when the crank-arm 34 rises to initial straight-away stitching position under the action of the spring 42. j

Upon` the bedlate of the machine. be'- neath the bracket-arm is pivotally mounted by means of the fulcrum-screw 50, a twoarmed bell-crank or elbow-lever havinga. shorter lateral arm 51 carrying a lateral stud 52, and a longer longitudinally extending arm 53 upon t e bottom of the forward extremity of which is secured by means oi" the fastening screw 54 the shank 55 of a stitch-receivin linger 56 normally disposed slightly ina vance of the center -of the transverse needle-slot 57 of thefthroat-plate 58, but adapted to assume operative relation crosswise of the needle-slot when its carrying lever 51 53 is shifted. The leverarm 51 is normally ymaintained in its for- Ward position,that of inaction of the stitchfinger 56, by means of a sprin 59 interosed between the same and the ase of the racket-arm 2, with the end of the stud 52 in contact with the dependin boss 60 of a double-conical cam-piece 61 Xed upon the vertical cam-rod 62 whose forked head 63 embraces and is secured by means of the piv. otalpin 64 to the rocking arm lVhen the arm 34 is in itsupper or straight-away.

stitching position, the stud 52 rests against the boss 60 of the cam-sleeve, and the stitchfinger 56 is in retracted or inoperative position, but when the arm 34 descends. depresses the push-rod, which carries with it the conical cam-portion 61 acting upon the stud 52 to shift the lever 51 53 to thro-w the stitch-linger in operative position across the needle-slot as indicated in Figs. 5 and 6, whereby the descent o f the needle alternately upon opposite sides of the saine causes the production of overseam or jog stitches across it. which are subsequently drawn off its point by the action of the feed-dog 65 in a well-known manner.

es The upp'erportion of the cam-rod 62 is over the same.

reduced and the lower part adjacent such reduced portion is screw-threaded to receive the correspondingly threaded cam-member 60 61, which is thus made adjustable thereon to conform with vthe adjustment of the needle-jog controlling mechanism fordierent widths of overseam. A jam-nut 66 -is applied to the threaded portion of the rod 62 to lock the cam-member in the desired p0- sition of adjust-ment. l

Aswillbe seen by referencel more partienlarly -to Fig. 8, the stitch-finger 56 isfof taperform from base to point, whereby the adjustment of its advance position determines its effect u on the stitches formed n 'conjunction with the previously described adjustment of the cammem'ber 6() 61, a sto -plate 67 issecured upon the bed-plate 1 iy means of the fasten' screws 68, the stop-plate aifordf n shoul er for positively -arresting the is'.

ward end of the lever-arm 53 'when' acted upon by the cam -member 61., The Stop-plate has the usual slotted apertures to receive the fastening screws 68, which fa'ord the re-' quired adjustment of the same.

The presser-foot vis mounted upon theA usual spring-pressed presser-bar 69 and is provided with a shank portion 70 arid al toot-plate, 71 channeled in its upper side and pivotally connected with a forward ex- `tension 72 of the shank-portion b v means of a pivotal pin 73. The foot-plate is notched at the inner side of its forward portion for clearance for the stitch-finger, and has formed in its lower side in alinement with the latter a groove 74 into which .the operative portion of the stitch-finger 56 projects and between which parts a suitable clearance space is provided to permit the easy release of the overseaimstitches as the work is fed forwardly beneath the presser-foot by the feeding mechanism.

Having thus set forth the nature of the invention` what I claim herein is 1. In a sewing machine, the combination with overseaming stitch-forming mechanism, of a. stitch-receiving finger adapted for movement. between extreme positions respectively within and out of the range of action of the stitchforming mechanism, spring-actuated means for maintainingsaid linger continuoushv in one of said cxtreme positions in the production of a succession of lstitches. und manually controlled means acting in opposition to .said spring for shifting said linger into the other cxtreme position.

ln a sewing machine. the combination with stitch-forming mechanism including a reciprocating nccdle. and a work-support'. of slack-prmlucing means adapted to engage the iieedlc-llu'e:ul adjacent the work-support for insuring the production of loose stitches in the work` means for normally retaining the slack-producingymeans out of operative sey relation with the stitch-forming mechanism during the production of a succession of stitches, and manually controlled means including an element extending below the work-supj'iort for establishingoperative relation between the slack-producing lneans and the stitch-'torming mechanism.

3. In a sewing. machine, the combination with the frame comprising a work-supporting member and an over-hanging bracketarm, and stitch-forming mechanism including a reciprccating needle. of slack-producing;T means adapted to engage the needlethread adjacent the work-supporting member tor insuring the production ot' loose stitches in the work, said slack-producing mean,-A hcing adapted to be shifted into and out of operative relation with .the stitchtorming mechanism, and manually controlled means comprising a ever fulcrumed upon the bracket-arm and operatively connected with the slack-producing means for controlling the position ot' the latter relatively to the stitch-forming mechanism. I

t. ln a sewing machine, the combination with stitch-forming mechanism adapted for production of 'straight-away and zigzag stitchin and ct'introlling means for changing the action ot the stitch-forming mechanism from one to the otherI kind of stitch production, of a stitch-receiving tinger movable into and out of operative position within the range of action fw stitch-forming mechanism and adapted 'i i receive and support` the zigzag stitches, and means for moving said stitch-receiving'tinger into and outI of operative position timed correspondingly 'with changes of the stitch-forming mechanism to and from zigzag-stitch producing condition.

ln a sewing machine, the combination with stitch-forming mechanism comprising s recipiwrcating and laterally jogging needle and a cooperating loop-taker. and actuating means Yfor imparting reciprocating niovements to said needle and operative movements to .said loop-taker, needle-jogging means. and controlling means wherebyv said needle-jogging means may be thrown into and out ot' etiective operation. of a stitchreceiving finger adapted for introduction into operative lposition in the range of lateral movement ot said needle. and means connected with the jog-controlling means for shitting said linger into and out of operative position.

G. ln a sewing machine, the combination with stitcli-f -r1iiing mechanism comprising a reciprocating` needle, a cooperating looptake. and actuating means for imparting reciprocating movements to said needle and operative movements to said loop-taker, nir-ins tor imparting jogging movements to s t medie, and controlling means whereby ng mea ns may be thrown into and out of effective operation, of a stitch-receivmg finger adapted tor introduction between the needle-paths during needle-jogging operations, and means connected with the jog-controlling means for moving said finger into operative position when the jogging means becolne operative.

7. In a sewing machine, the combination with a throat-plate formed with a needle aperture, and stitch-forming mechanism comprising a reciprocating needle adapted to enter Said needle aperture in the throatplate, a cooperating loop-taker, and actuating means for imparting reciprocating movements to said needle and operative movements to said loop-taker, normally inoperative means for imparting jogging movements to said needle, and controlling means whereby said jogging means may be thrown into operation, of a taper stitch-receiving finger adapted for introduction across said needle-aperture in the throatplate between the needle-paths during needle-jogging operations, and means adjustably connected with the jog-controlling means for moving said finger into operative position when the jogging means become operative.

8. In a sewing machine, the combination with stitch-forming mechanism comprising a reciprocating needle, a cooperating looptaker, and actuating means for said needle and loop-taker, of a laterally movable needle-frame, normally inoperative means for imparting jogging movements to said needle-lframe.` controlling means including a vibrating arm for throwing said jogging means into operation, a stitch-receiving tinger adapted for introduction between the needle-paths during needle jogging operations, a carrying lever for said stitch-receiving finger mounted upon a fixed fulcrum, a reciprocating cam-rod operatively connected with said vibrating arm of the jogcontrolling means, and a cam member mounted upon said cam-rod and adapted to engage said carrying lever to throw the stitch-receiving finger into operative relation with the stitch-forming mechanism.

9. In a sewing machine, the combination with stitch-forming mechanism comprising a reciprocating needle, a cooperating looptaker, and actuating means for said needle and loop-taker, of a laterally movable needle-frame, normalljv inoperative means for imparting jogging movements to said needle-frame, controlling means including a vibrating arm for throwing said jogging ymea-ns into operation, a stitch-receiving finger adapted for introduction between the needle-paths during needle-jogging oper- .ations, a carrying lever for said stltch-remember adjustably mounted upon Said faim rod and adapted to engage said carrying le ver to throvT the stitch-receiving finger into operative relation with Vthe stitch-forming mechanism.

104 l'n a sewing machine'i the combination with VStitch-forming mechanism comprising a reciprocating needle, a. cooperating loop*- taker and actuating mea-ns for said needle and loc' *fzkeigof a laterally movable needn endwise movable link-bar iv L nnocied at one end with the needle frame5 means -for imparting to said linkbar uniform. swinging movements 'of which one in each direction is effected` for every complete reciprocation of the needle, guiding means to determine the direction of movementA of said link-bar under the action of its swinging means, a controlling rockshaft by which said guiding means are carried, an arm fixed upon said rock-shaft and provided with means for moving it, .a stitch receiving finger adapted 'for ini-rednetion between the needle-paths during needle jogging operations, a two-armed carrying lever having):` a .fixed ulcrum at the junction of iis arms and inning fixed to one of said arms said stitclireceiving linger, a recipro ealing cani-rod pivotally connected'vto the asin of said roch-slurf@ a cam-member iiiied upon said camqod and adapted to enga'ge the second arm of said carrying lever, and a spring for maintaining Said lever-arm normally in the path of Inove'nient of said cam-member.

In testimony. whereo1", I haye signed my naine to thi.)` specification, in the presence of two subscribing Wltnesses.

l CHARLES FREDERICK GRAY. XVit'nesses S. H. SPAFFORD, A. S. MEAD.

sov

Images