US968852A - Sewing-machine attachment. - Google Patents

Description

P. JAGOBSON.

SEWING MACHINE ATTACHMENT.

APPLIOATION FILED MAR. 26, 1907.

Patented Aug. 30,1910.

2 sums-sum 1.

ATTORNEY P. JACOBSON.

SEWING MACHINE ATTACHMENT.

' APPLICATION FILED MAR. 26, 1907.

968,852; Patented Aug. 30, 1910.

2 SHEETS-SHEET 2.

WIT N58858:

' INVENTUR za e z1za\ 7 BY ATTORNEY UN IT ED STATES PATE N i T OFFICE. rn'rnn uconsoir, or cnicnao, rumors, assrcnon. TO THE- smenn. MANUFACTUR- me column, A conrom'rron on NEW JERSEY.

SEWING-MACHINE ATTACHMENT.

Specification of Letters Patent.

Patented Aug. 30, 1910.

To all whom it may concern:

Be it known that 1, PETER JAcoBsoN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and use ful Improvements in Sewing-Machine Attachments, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an improvement in thatclass of sewing machine attachments adapted to turn the edges of a strip of material preparatory to stitching the same for use as a bandor strap for articles of clothing. In the production of short guiding straps for attachment to the waistbands of trousers for maintaining the belt in positlon, it is customary to utilize small scraps of the material from which the garment is made, merely clipping the same down to the approximate width required, and introducing the same into the mouth or receiving end of the channel-guide for turning and direct ng the same for the stitching operation, which is effected by the employment of a twinneedle machine. As in the cutting of such garments it is notrcustomary to'carefully arrange and classify the scraps of diflerent materials employed, and such odd pieces are not subsequently carefully selected and accurately out to the desired width, it has frequently happened that the strip-foldingguldes having rigid tubular delivery orifices as heretofore employed have become clogged by reason of variations in thickness of the goods or in the widths to which the short.-

Strips have been cut.

It is the object of the present invention,

not only to provide means for preventing this clogging of the guiding attachment,

but to render more effective and otherwise improve the construction of this class of folding guides; and to this end the invention consists in the attachment hereinafter described. v

The invention will be understood by reference to the annexed drawings, in which- F i re 1 is a perspective view of the forwar portion of a sewing machine provided with the present improvement. Fig. 2 is a transverse section of the folding portion of the attachment, lookin toward the delivery end, and Fig. 3 an end view of the attachment as seen from a point in advance of its delivery end. Fig. 4 is a longitudinal section of the attachment, and Fig. 5 a side elevation of the delivery portion of the attachment, with the needle, presser-foot and feeddog to show the manner of delivery of the folded fabric to the "stitch-forming mechanism. Fig. 6 is a perspective view representing a strap produced by the use of the at tachment represented in the preceding figures. Figs. 7 to 10 inclusive disclose a modified form of backing-strip folder, Fig. 7 being a plan of such folder with its carrying plate, Figs. 8 and 9 enlar ed front and rear end views of the folder etached, and Fig. 10 a longitudinal sectional view of the modified backing-strip folder with the bodystrip folder. 7

The machine is shown provided with the usual bed-plate 1 and the bracket-arm 2 in which are mounted the needle-bar 3 carrymg the twin-needles 4 and the presser-bar 5 to the lower end of which is attached by means of the fastening-screw 6 the presserfoot comprising the shank-portion 7 and foot-portion 8 pivoted thereto by means of the pin 9 and having the forward portion of its lower operative face preferably channeled in a manner well known for guiding the folded strip of material delivered by the folding member.

The machine bed-plate is provided with the usual, longitudinally sliding cover-plates 11 for access to thearts beneath, and with a longitudinally ad ustable carrier-plate 12 provided with slotted apertures 13 to receive the fastenin -screws 14 by which it is secured to the be -plate, l and a transverse guide-way in which is fitted the transversely.

adjustable attachment-holding plate 15 provided with slots 16' entered by fastening disposed lengthwise of the same and entered tubular by the fastening screws 23 by which it is secured to the laterally extending arms 20 of the plate 18. i

As represented herein, the folding member comprises a spacing block 24 secured upon the arched cross-bar 21 by means of screws 25 and provided upon its upper side with a channel-member with rearwardly extending work-receiving portions having lateral guiding li s 27 and forwardly extending rounded fo ding or turning portion 28 whose rounded side walls are continuous with the guiding lips 27. The turning portion 28, which is formed with a downwardly ofiset bottom, has extending upwardly from the latter a lon 'tudinal stop-rib 29 to receive the edges 0 the strip to be folded. Upon the flat bottom of the receiving portion 26 is secured a work-supporting plate 30 having underturned rearward end to embrace the corresponding end of the plate 26 and having its forward end beyond theblock 24 spear-shaped and bent into inverted U-form to afford a spring-tongue 31 to support the body tion. This plate is reduced at the base of the tongue portion, as represented in Fig. 1, to give the requisite flexibility, and is secured to the block adjacent thereto by means of fastening screws 32.

Nearthe receiving end of the channelmember 26 is disposed a cross-bar 33, to which are attached by mea'ns of fasteningscrews 34, a pair of forwardly extending spring-arms 35 upon 0 posite sides of the channel-member 26 an connected at their forward ends by means of a segmental cappiece 36 which is flared rearwardly and forms, in conjunction with the forward or delivery end of the turning member 28, a tubular delivery orifice of which the upper section is adapted to yield by reasonof the elasticity of its carrying arms 35. By the employment of this upwardly yielding cap 36 and the laterally yielding spring-tongue 31, it is evident that the attachment is adapted to accommodate and properly deliver to the stitching mechanism strips of material difl'ering in a comparatively large degree in thickness and in the width to which they are out.

As indicated in Figs. 4 and 5, the stripguiding member 19 extends somewhat in advance of the forward end of the turningmember 28. The longitudinal shifting of the carrier-plate 12 effects the adjustment of the entire attachment crosswise of the line ofseam so as to enable the lines of stitch-' ing along the margins of the folded strip to be evenly spaced from the edges, while the adjusta ility of the attachment-holdin platelt'v parallel with the line of seam a ords means of setting the attachment at a distance from the presser-foot which is the of the fabric in the edge-turning operamost advantageous for the operation of the device.

It sometimes happens that the feeding mechanism of the sewing machine, herein represented by the feed-dog 37 has a slight inclination to draw the work to one side or the other, in which case the normal relation of the body-strip with the backing-stri of the two guides is likely to be disturbe In order to compensate for any such action, the turning guide is made adjustable laterally in respect of the backing-strip guide 19, as before described, thus insuring the ultimate evenness in spacing of the edges of the superposed strips, as represented in Fig. 6.

In order to show the operation of the attachment, a strap is illustrated in perspective view in Fig. 6 with the forward portion comprising the body-strip a and backing-strip b stitched together, but with the rearward end portion of the body-strip partially flattened out to exhibit its condition as it passes from the receiving portion of the channel-member into the turning portion where its edges are bent downwardly around the tongue 31.

In the form of the improvement above described, the backing-strip guide comprises merely a flattened tube adapted to accommodate a strip with selvage edges, such as a braid, or a wlder strip with inturned edges previously folded, in the form represented in Fig. 6. In Figs. 7 to 10 inclusive, is shown an alternative form of backing-strip guide 19 of well known form, which is of flattened tubular cross-section at the receiving end, gradually merging toward the delivery end into the shape represented in Fig.

marginal portions of the strip 1) of fabric are gradually turned upwardly and in wardly in its passage to the stitch-forming and feeding mechanisms. This guiding member, like that shown in the preceding figures, is carried by a plate 18 for securing it upon the holding plate 15, and for supporting the block 24 which carries the bodystrip folder.

As will be readily observed, the present improvement differs radically from folding attachments designed to deliver binding strips with overlapped edges to the stitchforming mechanism, in that by the present improvement the strip is delivered to the stitch-forming mechanism in substantially closed tubular form with the central portion overlying the inturned edges, the extremities of which normally abut against the stop-rib 29, which is directed intermediate the space between the needles in order that the latter shall lay the lines of stitches intermediate" such edges and the extreme marginal portions of the folded strips thus presented to the stitch-forming mechanism, as represented aaasmi in-Fig. 6, and as also indicated in'Fig. 1,.

wherein the yielding tongue 31 overlying the stop-rib 29 is directed intermediate the needle holes in the presser-foot through which the needles pass 1n the stitch-forming operation. I

VVhiIe the present improvement is s'hown and described herein in its preferred form,

it is evidently susceptible of modification in details of construction and arrangement of parts toa certain extent without departure from the present invention.

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

1. A sewin machine attachment comprising a base-p ate, a spacing-block mounted upon the same,'a strip-guiding channel-member fixed upon said block intermediate its ends and having an open-topped receiving portion extending over and beyond one end of said block and a folding portion with downwardly offset bottom at the opposite end of said block, the side-walls of the receiving portion being extended to the delivery end and gradually tapered and inwardly inclined in the folding portion thereof, and a work-supporting plate secured to.

said block upon the receiving portion of the channel-member and formed with a springtongue embraced by saidtapered side-walls of the folding portion and overhanging the offset bottom of the latter.

' 2. sewing machine attachment comprising a strip-guiding channel-member contracted and rounded toward its delivery end and provided with a substantially laterally closed delivery orifice, a central. stop-rib upon the bottom of said channel-member extending longitudinally thereof to its delivery end, and a longitudinally extending and laterally yielding tongue of taper form and inverted U-shaped cross-section enteringthe channel of and embraced by said channel-member and adapted when laterally deflected to straddle said stop-rib.

3. A sewing machine attachment comprising a strip-guiding channel-member contracted and rounded toward its delivery end, a longitudinally extending and laterally yielding tongue of taper form and inverted U-shaped cross-section embraced by said channel-member, a central longitudinally extending stop-rib upon the bottom of said channel-member beneath said yielding tongue at the delivery end of said channel-member, and ayielding segmental cap normally seated upon the upper portion of the contracted end of said channel-member to form alaterally closed tubular delivery orifice in conjunction therewith.

4. A sewing machine attachment comprising a strip-guiding channel-member contracted and rounded toward its delivery end, a longitudinally extending and laterally yielding tongue of taper form and inverted U-shaped cross-section embraced by said channel-member, a central longitudinally extending stop-ribupon the bottom of said channel-member. beneath said yielding tongue at the delivery end of said channelmember, a pair of longitudinally disposed spring-arms rigidly connected with the opposite sides 'Of said channel-member adjacent its receiving end, and a segmental cap connected with and carried by the other ends of said spring-arms and adapted to form in conjunction with the delivery end of said channel-member a laterally closed tubular orifice having a laterally yielding section.

5. A sewing machine attachment comprising a holding-plate, a backing-strip guide rigidly secured thereon, an overlying strip-guiding channel-member rigidly connected with said backing-strip guide but latthereof, said channel-member having a contracted and rounded delivery end portion, a taper spring-tongue secured Within said channel-member and embraced by its contracted end portion, and a longitudinal stoprib upon the bottom of said channel-member within its contracted delivery end poftion and disposed beneath said spring-tongue.

7 The combination with a sewing machine comprising stitch-forming mechanism including a pair of spaced reciprocating needles, of a combined backing-strip guide and body-strip fold guide in superposed relation, a support for the same provided with means of lateral and longitudinal adj ustmentfor adjusting the same bodily in respect of said stitch-forming mechanism, and an adjustable connection intermediate said guiding members for affording relative lateral adjustment of said members.

8. The combination with a sewing machine comprising stitch-forming mechanism including a pair of spaced reciprocating needles, a presser-bar, and a presser-foot carried thereby, of an attachment supported independently of said presser-foot and comprlsing a strip-guiding channel-member directed toward the stitch-forming mechanism in the line of feed and contracted toward and divided at its delivery end, a longitudinally extending and laterally yielding tongue embraced by said channel member,

and means for yieldingly supporting a section of said channel member at its delivery end whereby the latter is enabled to yield in the direction of reciprocation of said needles.

men.-

In testimony whereof, I have signed my 10 name to this ecification, in the presence of two subscribing witnesses.

PETER J ACOBSON.

. Witnesses:

Guns. E. ERIE, O'rro 0.,WIECHMANN,

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