US1707569A - Shoe-sewing machine - Google Patents

Description

J. H. REED SHOE SEWING MACHINE April 1929.

I IE. m M u M. 0m T e M E M A w u aw y W m 0 5 0 Q" s 2 w m G o w G v w, H M in y Q g. h n w MIMI HIHIHI M. l nm w w/ H." W fl w m w. 8 wq 4 o April 2, 1929. REED 1,707,569

SHOE SEWING MACHINE Filed June 215, 1923 2 Sheets-Sheet 2 Patented Apr. 2, 19129.,

UNITED s'rA res- PATENT v OFFICE.

JAMES H. REED,- or swamrsoorr, MASSACHUSETTS; ass'rerivon, BY MEsNnAssIeN- IVIENTS, "r UNITED SHOEMACHINEEY CORPORATION, or PATERSON, NEW JERSEY, l

A CORPORATION or NEW JERSEY. v

sHoE-sriWINeMAoHrNn;

App l ication filed megs, 192,3. sria 11%. 647,286.

This invention relates to v a lock stitch shoe sewing machine'of the type shown in my prior application for Letters Patent, Serial No. 542,666, filed March 10,- 1922, of

which this case is a division in part and with respect tosubject niattercoininon there- 'to. Said machine sews ai loek stitch seam and has a straight hook needle and a shuttle for supplying a shuttle thread on th.e outer 1 side of the sole of the shoe,v while within the shoe there'is'a cooperating hornprd vided with an oscillatinglo'oper or whirl. for

' supplying a cop or needle thread The present nventlon relates to the take or cop'th'read in a machine of this type, and has for its object to provide mechanism ,wherebyrthe needle loop, after being passed 'whichz I Fig.,-l. is aside elevation, partlybroken away,of substantially the complete machine. Fig. Q'is a front elevation. onan enlarged scale of the instr-ulnentaliti'es, locatedadjacent'the stitch formingpoint.

' F ig.. 3 is a detail view illustrating operationof the needle and Wh irl. j Fig.4'is ardetailplan'view, and Figure 5 a detail front elevation, of the; stitch forming'takeup. I w v V Fig 6 is'ai 'enlargedisectional view of'the "work,showingthe completed stitch.

The general organization of the machine and the cooperation of its-severalgroups of nechanisni will. first be outlined, after which the construction" and arrangementof that groupto which the present case particularly relates will be described more'ln detail. 1

'50' The main frani'epof the machine comprises a base .sup porting a horn or worksupport 26 and from which llSGS an upr1ght'27 car-.-

up devices which cooperate with the needle trated in the accompanyingdrawings, in

render it capable of being inserted in toe of a-shoe and comprises, as is usual :infma chines of this character, lower and upper portions, 26" and 269, respectively,angularly disposed withrespect to one another and rigidly; connected by an intermediate elbow.

Said'horn is niou-ntedin a bearing 29 secured tothe front of the base 25 at the topof the latter,being provided with a hollow base 52 having a ournal portion 3O rotatably mounted-in said bearing in such a manner as tope'rinit said horn to be turned as the sew;

ing progresses; The'work, which is desig-.- nated as a Whole by the letter A in Figures 1, 2 and 3, is shown noreparticularly in Figure 6 as comprising a McKay shoe having'an'upper'p, an'outsole g, and an "insole 1 connected by, stitches s; The needle 31,

whichiis. above the work,is straight and is lforniedfadjacent its pointed lower end with an. open, loop-engaging hook. or barb, Vvithinvthe tip :of the horn 26, and there.-

fore'belowithe' worln or at the opposite side thereof from the needle 31, is a looperl or whirl 132fwliieh is rotatably mounted to I i oscillate in""said horn,- and is actuated, through inter'geared shafts :56'and 59 journalledlrespectively in the portions 26 and 26 of the horn froin a vertical shaft 62w extending co-axiially, through the journal portion of the hornandrotatably mounted 4 therein, said shaft being oscillated, 'througlra series of interineshing pinions' 65, lb'y'a' reciprocating i'ackbar 67. ,The whirl 32 is provided with an'eceentric thread open v ing (Figure 3) to receive the cop or needle thread 34, and with an axial opening 33 'to receive the point of the needlewhenithezlat ter descends to penetrate thework, whereby a e said-whirl-operates to' form a loop about the y needleimmediately.abovefthe hook of the latter, as indicated in Figure 3'. .Thereafter, wasthe' needle rises, asshown in Figure 2,}the- 1001; so forniedisdrawn upwardly through thework; rAbove: the work-,or at the. same side thereof' as vthe needle, is an oscillating discoidal shuttle 5 earryin'ga.shuttel thread 6;,Qsaid shuttle having a hook or beak 37,

and shuttlethrelad; 'Below the work support 26-is a main or stitch forming takeup38 acting. on the needle thread 3 ada tei;l to

draw the needle loop over the shuttle and down upon the work, thereby completing the formation of the stitch. Above the takeup 38, and within the horn 26,. is a second tal'zeup or stitch setter 39 adapted, after the formation of the stitch, to set the latter and draw the thread looks into the material. The needle thread 34 is held for the action of the takeup 3-8 and stitch setter 39 by a thread clamp 40, and is drawn from a suitable supply (not shown) in measured quantities for each stitch by a combined pull-off and thread measuring device 42, during which. time the thread is held by a second thread clamp 401. The thread clamp 40 is located between the supply and the pulloil and the thread clamp 401 between the pull-oil and the takoup. Between the thread clamp 401 and the takeup is a waxpot 41 through which the thread is guided in its passage from the. former to the latter. During the formation and setting of each stitch, the "work is clamped upon the horn 26 by a presser foot 48 carried by a presser foot bar 148, andbetween the formation of successive stitches said work is fed along the line of the seam by means of a feed point or awl 44, which serves also J-to' perforate or incise the work :to facilitate the passage of the needle therethrough. The pull-oil .42

is operated'by the rack bar 67 through clutch'49 may have associated therewith alever 142 havin an adjustable slide 144 which is connected by a link 145 and'lever 146 with thepresser foot bar 148, whereby the stroke of said pull-off is automatically proportioned to the thickness of the work A. This mechanism as. shown is substantially similar to that disclosed and claimed in my application, Serial No. 595,580, filed October The instrumentalities above referred to are all actuated from a main horizontal shaft 45 journalled in the head 28'and a vertical cam shaft 46 joui'nallcd in the upright 27 and operatively connected with the main shaft 45 by spiral gears 47. The main shaft 45 receives power from any suitable source through ap'ulley 48 loosely mounted on said shaftv and adapted to be connected therewith :by'means of a clutch 49 operated, through suitable. connections, by a treadlelever 50 at the base of the machine. If desired, the

suitable stop mechanism adaptedto stop the Such shown in detail herein.

The foregoing explanation of the purpose, location and function of the several inst-rumentalities of the machine will be sufiicient for a clear understanding of their coopeia-- tion with the takeup- 38 stitch setter-39 to which the present case'relates and which will nowloe described in detail.

The takeup 38 comprises a roller carried the stitch at the time of the operation loya rod 108 suitably guided for longitudinal movement in a. substantially horizontal plane in the base 25, said rod being connected at its rear end to a bell crank lever 109 'fulcrume'd upon the base 25 and carrying a cam roller 110 cooperating with a cam 111 on the shaft 46. The takeup roller 38 engages the needle thread 34 between two stationary guide rollers 112, said takeup roller 1 35 being movable between the rollers 112 in a direction transverse to the plane of the axes of said rollers, thereby deflecting said thread from its normal path and exerting a pullupo'n the same. As above stated, the takeup 38 is operated to pull the needle loop over the shuttle and down substantially to the work, the stitch setter 39 thereafter acting-to. set the stitch and pulling thethread looks Z into the material to the desired extent, as shown in Figure 6. The throw or stitch setting pull of the stitch, setter 39 is preferably constant in amount,-, and, in. order to determine the depth to which the thread locks Z are set in the material, means are preferably provided for adjusting or varying the effective action of the takcup 38 and thereby determining the condition of of, he stitch setter. To this end the guide rollers 112 are carried by slides 113 (see Figures i 4 and 5) guided for movement "toward and from thetakeup roller 38 and toward and from 'eachother in a bracket 114 secured to the front of the base 25. For simultaneously adjusting the slides 113 and guide rollers 11-2, tliere is preferably provided. a vertical rod 115 journ'alled at its ends in the bracket 114, and havingright and left 't-l11'6d-(lS'6I1- gaging the slides 113 respectively, said rod having squared ends 110 whereby the same 1 maybe readily turned. The movement of the takeu'p 38 is a relatively slow and gradual one as compared to the quick stitch setting snap of the stitch setter 39. I

Upon the completion of the stitch by the stitch forming devices and takeup, the stitch setter 39 acts to give the thread a short, sharp jerk, corresponding very closely to the I snap given to the, thread in hand sewing,- and serving to set the locks of the stitches within the stock to an extent determined by the adjustment of the takeup','a's above described.

In order to accomplish this result in 'a'satisfactory manner, it is "desirable that the stitch setter. engagethe'needle thread "at a point as close as possible to the work, and to this end is located within the horn "26 above the bottom thereof. In. the construction shown, said stitch setter comprises a. roller adapted to engage. the'needle thread between guide rollers 9O, which are located at the. elbow of the horn, and deflect said thread .out of its normal path between said rollers by a movement transverse to said path. To this'end the roller 39'is carried'by a rod 117 guided for longitudinalxmove-v inent in a bracket260 secured within the lows or portion 26 of the horn, said rod being pivotally connected at its lower end to one end of a lever 118 locatedwithin the hollow I base 52 and fulcrumed at itsopposite end upon a fixed stud 119 therein. The lever 118 is connected intermediate its ends with the upper end of a vertical rod 121 guided for longitudinal movement in the journal portion 30 of the horn at one side of the shaft 62. The rod 121 is'provi'ded at its lower end Witha notch 122 engaging theedgeof a circular opening 123, concentric with the jour-' nal portion 80 and shaft 62, in a cross-head 12 i, whereby the operative connection of said parts is maintained, irrespective of theangular position into which the horn is turned.

setter 39 may be, andpreferably is, given a movement to assist, the takeup 38 in the formation of the stitch, thereby decreasing the necessary range of movement' of the takeup. Such movement of the stitch setter,

if employed, is however, a relatively slow one, corresponding with the movement of the takeup, the stitch setting'movement thereof being a relatively short and quick one as compared to that'of thetakeup, as above explained. It will be observed that the takeup 38 and stitch setter 39 are both in the form of rollers providing smooth surfaces over which the thread renders freely, as distin:

guishe'dfrom thread gripping devices which have been fo'und'toinjure the thread, the

thread in the present instance beingheld 1 Having thus described my invention, I claim: 7

up comprising a pair of stationary thread guides, a thread engaging member between said thread guides and movable ina direction transverse to the line connecting said guides, said guides being relatively adjustable toward and from each otheralong the lines connecting said guides and transverseto the direction ofmovement of the thread" engaging member to vary the effective takenp action of said-thread engaging member and .a cam and connections 'for actuating said thread'engagingmember.

'2. In a sewing machine, takeup inechanism compr sing a pairof thread guiding rollers, a threadengaging roller locatedbetween saidthread guiding rollers and-mov able in a direction transverse to the plane of the axes of-said thread guiding rollers, slidesby which said thread guiding rollers are'carried, said slides being guided for movement toward and from each; other to,

vary the' effective takeup action of said thread'engaging roller,-and a screw for. ad- Justing said sl des simultaneously in opposite directions. r r

for the action of the'it'akeup and stitch 7 setting rollers by the-main thread clamp .40, which engages the threadprior to its passage 1 through the wax pot 41.

1 In a'lock stitch sewing machine, a take In testimony whereof I affix lily signature.

JAMES H. REED.

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