US1025441A - Overedge sewing and cutting machine. - Google Patents

Description

C. M. ABERGRUMBIE. OVEREDGE SEWING All!) CUTTING MACHINE. APPLIOATION HLED MAY 1910.

1,025,441 Patented May 7, 1912.

2 SHEETS-SHEET 1.

ATTORNEY G. M. ABEROROMBIB.

OVEREDGE SEWING AND cu'r'rme MACHINE.

APPLICATION FILED MAY 3. 1910.

7 1,025,441 Patented May 7, 1912.

2 SHEETS-SHEET 2.

INVENTOR w NESSES (gazes 95. Q'Jercramia ATTORNE Y 53' illustrating the invention, in the several UNITED sTA' ss PATENT OFFICE.

CHARLES M. ABER'CROMBIE, OF BRIDGEPOBT, CONNECTICUT, ASSIGNOR TO THE SINGER MANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

OVEREDGE SEWING AND CUTTING MACHINE.

To all whom it may concern I Be it known that I, CHARLES M. ABER- Lonoamm, a citizen of the United States, re-

panying drawlngs.

This invent-ion relates to improvements in sewing machines for making the so called overedge, spokestitch or hemstitch seam, and has for its object to'broaden the application of'such machines by rendering them capable of effecting in a single opera tion productions which have hitherto required multiple operations.

In'the manufacture of hand towels. it has been the commonpractice to weavethe towels separately or to out lengths of toweling from the web and hem fold 'and secure the opposite ends thereof by lines of hemstitching; but in connection with recent productions it hasbeen found desirable to hemstitch the raw edges, thereby obtaining a more desirable finish and effecting a substantial saving in material for a given size of'towel; and, so far as applicant knows, such overcast-or hemstitch finish has been produced by first forming the individual towels and afterward overcasting the edges, usually by using a hemstitch sewing machine. Tlie purpose of the present invention is to form two lines of overedge stitching simultaneously and at the same time sever the fabric intermediate said. lines of stitching, thereby materially reducing the cost of production and effecting a more uniform finish.

The invention is herein shown in connection with the commercial hemstitch sewing machine represented by U. S. patent toJ. Walker, No. 634,970, dated Oct. 17, 1899, but as the practical operation of the inven- .tion is not dependent upon any specific form of construction for giving to the needles and the piercer the necessary movements for producing slightly separated parallel rows of overedge stitching, only so much of the machine proper has been illustrated as is deemed essential for an understanding of the inventlon. Referring to the accompanymg drawlngs Specification of Letters Patent.

. Application filed May 3, 1910. Serial No. 559,050.

Patented May 7, 1912.

figures of which like parts are similarly, designated, Figure 1 is a view in front end.

elevation of a portion of the sewing machine bed-plate and bracket arm illustrated in the previously referred to atent, together with the piercer, one of t e needles, the cloth-pressers and the cloth-presser-carrying bar, the cutting mechanism being shown in front side elevation mounted upon the cloth presser-carrying bar. Fig. 2 is a frontend;

elevation, in perspective, of Fig. 1 Fig. 3 is a rear side elevation, in perspective, of Fig. 1. Fig. 4 is a perspective view of the cutting mechanism detached from the clothpresser-carrying bar. Fig. 5 is a perspective view of the throat-plate. Fig. 6 is a per- 'spective view of one form of production effected by the improved mechanism- 1 represents the bed-plate of the sewing machine, 2 the bracket arm,.3 the front and 4 the back slide'plate, 5 the throat-plate, 6 the feeddog, 7 and 8' the needles, 9 the needleactuating bar, and 10 the piercer' carried' by the bracket 11 which is secured by screw 12 upon the piercer-carrying bar 13.

14 and 15 represent the cloth-presser brackets, the latter of which is secured by screw 16 to the cloth-presser-carrying bar 17 The bracket 14 is mounted to move ve'r-- tically upon the bar 17 and is held depressed by the spring 18 in a manner common to machines of the class herein referred to.

l9 and 20 represent the commonly-employed rocking pressers.

To the lower end of the needle-actuating bar 9 is secured, by a clamp 21 and screws 22, 22, the needle-bar bracket 23 to which are pivotally secured, by screws 24 and-25,

the needle brackets 26 and 27. The bracket 26 carrying the needle 7 and the bracket 27. carrying, the needle 8 are operatively c onnected, through the rods 28 and 29, respectively, with the actuating mechanism of the sewing machine to cause each needle to be moved sidewise to pierce the fabric in different vertical planes, causing each needle thread to be concatenated wit-h its coacting under thread to form separate rows of stitches which are interlocked to form binding stitches as in the device of Patent No. 634,970 previously referred to; and as in the'device'of said patent, when the needles descend with thepiercer to form the'inner or edge stitches, said needles enter the opening formed by said .piercer, thus effecting the openwork or spokestitch seam. Secured to the lower end of the needle-actuating bar by' a screw is a thread-guiding wire 31 which is provided for holding the upper threads in proper alinement with the needles.

The cutting mechanism comprises a main bracket 32 provided at its lower end with a stationary shear blade 33, whose cutting edge is parallel with the feed of the fabric and in line with and at the rear of the piercer, the upper end of said bracket, in the present instance, having formed integrally with it an arm 34 constituting a pinch bracket for suspending the cutting mecha- 15 nism upon the lower end of the clothressercarrying bar 17, a screw 35 serving to secure sgid armupon said bar.

3'drep'resents a cutter-actuating lever pivoted u on the stud bolt 37, said bolt being jsecure by screw 38 in the bracket 32. The

rocking shear blade 39 is also pivoted upon said bolt and is secured to move with the l cutter-actuating lever 36 by the lug 40 entering the notch 41 formed in the blade 39. 42 represents a spring, one end of which is attached, by screw 43, to the cutter-actuating lever 36, its opposite end being attached to the free end of the bracket 44 which is secured by screw 45. to the main bracket 32,

30 said spring iacting to resiliently hold the lever 3fi-in opposition to the downward iv -anovement of the needle-bar bracket 23 carried by the needle-actuating ,bar 9, said bracket acting upon the curved portion 46 35 of said actuating lever to rock the blade 39 40 leading the material over the cutting edge of the blade 33.

The throat-plate 5 is provided with the usual feed-dog openings, 48, 48, and needle and piercer opening 49, and is secured to the bed-plate 1 by screw 51.

In the operation of the device when employed in connection with the stitch-forming and cloth-feeding mechanism represented by Patent No. 634,970, the needles are given 50 lateral or swinging movements back from the cutting line, as when forming the depth stitch 52, a distance suflicient to insure that the clusters 53 of the threads forming the fabric 54 will be held bound together sub- 55' stantiallyas shown in Fig. 6.

Claims:-- I 1. In a sewing machine, a stitch-forming mechanism including two needles each hav-- ing sidewise movements to form parallel lines of stitches',a piercer having vertical movements to form openings in the fabric being acted on into which said needles descend in the formation of the inner lines of said stitches, Y and a cutting mechanism whose coacting blades are arranged in a line corresponding to the direction of the feed of said fabric and o eratively connected with the actuating mec anism of the sewing machine to sever said fabric at the rear of and in line with said piercer openings during the stitching operation.

2. In a sewing machine, a stitch-forming.

mechanism including two needles each having sidewise movements to form parallel lines of stitches, a plercer havlng vertical movements to form openings in the fabric being acted on into which said needles descend in the formation of the inner lines of said stitches, a cloth presser mechanism including a vertically moving clothresser carrying bar, and a cutting mechanlsm secured to the lower end of said bar whose coacting blades are arranged in a line corresponding to the direction of the feed of said fabric and o eratively connected with the actuating mec anism of the sewing machine to sever said fabric at the rear of said iercer and in line with said piercer open- .acti blades are arranged in a line correspon ing to the direction of the feed of said fabric and operatively connected with the actuating mechanism of the sewing machine to sever said fabric at the rear of and in line with said piercer openings, and a throat-plate provided with a rib over which said fabric is advanced to'.-said cutting mechanism.

4. In a sewing machine, a stitch-forming mechanism including aneedle-bar carrying two eye-pointed needles each of which are given sidewise movements to form parallel lines of stitches, a piercer having vertical movements to form 0 enings in the fabric being acted on into w ich said needles descend in the formation of the inner lines of said stitches, a cutting mechanism whose coacting blades are arranged in a line corresponding to the direction of the feed of said fabric and operatively connected with said needle-bar to sever said fabric at the rear of said piercer and in line with said piercer openings, and a throat-plate provided with a r1b over which said fabric is advanced to the action of said cutting mech anism.

5. In a sewing machine, a stitch-forming mechanism including a needle-bar carrying two eye-pointed needles each of which are given sidewise movements to form parallel lines of stitches, a piercer havin vertical movements to form openings in t e fabric and operative-lyconnected Wit-h saidneedlebeing acted on iniowhich said needles descend inthe formation of -the inner lines 0;? said stitches, va cloth-presser mechanism including a vertically moving 'elot-h presser carrying bar, a cutting mechanism secured to the lower end of said bar Whose cutting blades are arranged in a line corres ending to the direction of the feed of'xsai fabric bar to se er said fabric at) therear of said 'piere'er', and aj throat plate providedi vith a rib over which said fabricisadvanced to the'action of said cutter. In testimony whereof; I have 'signed my nametb this specification, in thepresence f 15" t-Wo subscribing witnesses. I

CHARLES M. ABERCROMBIE. Witnesses Anmn' M'. DONIHEE,

WI'L IAM'A. FLANAGAN..

Gopies 01 this patent may beobtaine'cl for five cents eaqmby' aadi'essi1igthe; Gon missioner 6f Eaten;

I Washington, D. 6.?

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