US1401726A - Hemstitch attachment for sewing-machines - Google Patents

Description

' W. LIPIERCE. HEMSTITCH ATTACHMENT FOR SEWING MACHINES. APPLICATION FILED JAN. 9.51919.

' 1,401,726, PatentedDecQ 27, 1921;

WILLIAM L. PIERCE, OF NEW YORIL'N. Y.

HEMSTITCH ATTACHMENT FOR SEWING-MACHINES.-

Specification of Letters Patent.

atenteol DecQZYQ, 1921.

Application filed. January 9, 1919. Serial No. 270,277.

To all whom it may concern:

Be it known that I, WILLIAM L. PIERCE, a citizen of the United States, residin at New York, county and State of New Y ork, havemade a certain new and useful Invention in Hemstitch Attachment for Sewing- Machines, of Which the. following is a specification.

This invention relates to hem stitch attachment for sewing machines.

The object of the invention is to provide a hem stitch attachment which is simple in construction, eflicient in operation, and economical of manufacture.

A further object of the invention is to prowhat direction or through what angles and curves the material is fed to the machine.

Further objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination, location and relative arrangement of parts, all as will be more fully hereinafter set forth as shown by the accompanying drawings, and finally pointed out in the appended claims.

Referring; to the drawings Figure 1 1s a view in side elevation of presser foot including the hem stitch arrangement embodying my invention.

F 2 is a sectional view taken on the line 2,2, Fig. 1, looking in the direction ,of the arrows. v p e I v Fig; 3 is a view in side elevation of one member of the 'presser foot to which is secured the attachment embodying my invention, and isa. sectional'view taken on the linjeS, 3, Fig. 4, looking in the direction of the arrows. r

Fig; 4 is a front View of the presser foot. Fi 5 is a sectional view taken on the line 5, 5, ig. 3, and looking in the direction of the arrows. Fig. 6 is a view in perspective, slightly enlarged, of the lower presser foot shown in Fig. 3.

ing machines wherein a cord isfastened un- .encountered'heretofore in attachments of .this

ture heretofore employed when a defecthas goods being operatedupon. Inasmuch as the .Fig. 7 is a similar view'of a "slightly modi-f fied construction embodying my invention.

The same part is designated by the same reference character wherever the same occurs throughout the several views.

, This present invention is directed particularly to hem stitchingattachments for sewder thestitch; In further explanation, it is' directed to machines wherea plunger is op:-

erated at intervals to punch a hole into the cloth or material which is being operated upon, and wherein a border comprising a cord of suitable texture or material and color borders the hole formed by the puncli'or plunger on each side the'reof'and is secured to the material by the stitching action of the threaded needle. Great difiiculty has been nature due to the fact that while the opera tion is satisfactory and the work is efficient and neat as long as a straight line of work is. being effected, as-soon as itis necessary to turn a corner or. a curve in themater-ialthe cords do not come. under the action of the stitching needles, and as is frequently the case, the cord of one side jumps to the other side and both cords are either unstitched entirely or are stitched together. It is amongthe special purposes of my present invention to provide means for overcoming this 7 defect and for insuring atrall times no matter at what angle the material is fed to the machine nd no matter what angles or curves it is required to turn the cords remain in their proper position and each stitch is perfectly secured. 1 p

Further, in the type of devices of this naoccurred it is'necessary to cut the cord and thread and to rethread the cord through its guldeways which heretofore have been horizontal, that is, parallel to the plane of the space between the presser foot and the goods operated upon-is exceedinglysmall, it is quite difficult to effect the threading of. the cord through'its guideways and requires time, patience andlabor. It is among the further purposes, of my present invention to prevent these difficulties [and to provide means whereby the cord may be easily and readily threadcd inpthe initial operation of the machine, it being understood that rethreading; due to. cutting ofthe cord on account of imperfect, stitchingseldom, if ever,

- ing into the space between the respective occurs with the improved device or" my invention.

The presser foot is shown generally in Fig. 1, and consists of two standards, 1 and 2, adapted to be suitably carried by the machine to which the same is attached in the usual and well known manner, for ple,

pin or rivet 6 but for simultaneous movement in vertical direction. The opposed surfaces of the feet 3 and t have at their rearward ends PIQJECtlOIlS 7 which xtend toward each other and form a plate extendfeet 3 and 4! to prevent the goods being operated upon from rising or buckling under the presser feet and to keep same smooth after having been sewed. The forward ends of the plates 7 are curved as indicate at 8. The forward end of the foot 4 is provided with a plate 9 which extends substantially across the inter-- vening space between the opposed inner St rfaces of the feet 3 and l, the plate 9 being for the purpose of keeping the goods flat after it is being led to the position where the respective needles operate upon it. The rear end of the plate 9 is curved and together with the curved surface 8 of the plates 7 forms a pocket between the presser feet, and

between the respective plates 7 and 9 in which the sewing operation is effected. Se-

cured to the inner surface of the presser foot 3 is an angle plate 10, the end of which ll, is disposed at right angles relative to the surrace or the foot 3 and extends the pocket formed by the plates 9 anl 7. The angle plate 11 is provided with two openings 12 extending therethrough and I through which the cord above explained is led. The respective needles as is usual with hem stitching machines comprise a single cutting plunger and a pair of stitching needles, one for each side of the hem stitch. The plunger operates before the angle plate 11 and is indicated in Fig. 2 by 18. he respective needles operate by the angle plate 11 indicated in Fig. 2 by 14. It will be understood as is usual in the art the stitching needles 1a operate toward and away from each other, that is, on one operation of the stitching needles the needles are fairly close together and on the next operation of the needles,

that is, the next time it passes through the goods the needles are operated away from each other, thus securing a stitch over a definitely prescribed distance. The effect will be more apparent by reference to Fig. 5. The plunger needle 13 being positioned in advance of the angle plate 11 cuts the hole into the goods. The cord indicated by dotted lines passing through the holes 12 in the angle plate 11, whole holes extend in a plane parallel to the plane of the goods bein opis red to the a tion of the tie needles 1% on one stroke be on the inside of the cord as indicated at and on the next stroke being on the outof the cord as indicated at let Thus it -e cord is stitched as a cut in the goods by the the hem stitch completed. "ence to Fig. 3 that the substantially the same slate 7 and 9 and in efl'ect ate be: ween the two points of ror holdin the goods treated in a flat position. The advantages of this construc tion are apparent. in the first place by leading the cord directly and in close L the point to which it is treated operatio .c is operated upon, in perfectly flat condition. Furthermore, by providing the ide holes 12 in the angle plate 11 in a ne parallel to he plane or the goods to perated upon l'afford simple means for 1g the cord which makes possible the h ng thereof with little or no trouble or lapse of time.

any modifications will occur to those the art without departing from the 111 and scope of my invention delined in the claims, and therefore do not desire to be limiter, to the p rticular form of my ii-vention shown and described, for example, and reierrins' to Fig. 'Z, the presser u la smooth e e material which is being hemstitched. 53y further turning the edge 21 of the member 20 the material can be turned twice. 7 V

Having now set torththe objects nature of my invention, and having shown and described a structure embodying the principles thereof, what l claim as new and useful and of my own invention, and desire to secure by Letters Patent is,-

l. in a cord border hemstitching attachment for sewing; machines, the combination with a c plur r stitching needles for stitching a cord border on opposite sides of hole cut by said cutting plunger,' of a l suitably secured tl ereto for the goods wh ch is o to the machine to form a cord guide positioned between said cutting plunger and said stltchlng needles.

2. In a cord border hemstitching attachwith a cutting plunger and stitching needles for stitching a cord border on opposite sides of the hole cut by said cutting plunger, of a cord guide positioned between said cutting plunger and said stitching needles, and provided with threading or guide holes extending in a plane parallel to the plane of the material operated upon. 7

4. In a cord border hem'stitching attachment for sewing machines, the combination with a cutting plunger and stitching needles for stitching a cord border on opposite sides of the hole cut by said cutting plunger, of

presser feet for holding the material operated upon in a flat position, of a cord guide carried by one of said presser feet and positioned between said cuttmg' plunger and said stitching needles, and provided with thread ing or guide holes extending in a plane par-' allel to the plane of the material operated upon.

5. The combination with a pair of independently movable spaced presser feet, of means carried thereby for forming an inclosure therebetween, intermediate the ends thereof, a guide plate carried by one of said feet and a cord guide member carried by the other of said feet, and extending across the inclosure and cord guide member being provided with threading or guide holes extending in a plane parallel to the plane of said presser feet.

6. The combination with a pair of pivotally mounted and spaced presser feet, of a smoothing member carried by one of said feet, and a cord guide carried by the other of said feet, said guide member having threading holes therethrough in a plane parallel to the plane of said feet.

.7. In a cord border hemstitching attachment for sewing machines, the combination with a cuttingplunger and stitching nee dles for stitching a cord border'on opposite sides of the hole cut by said cutting plunger, Y

of presser feet for holding the material operated upon in a fiat position, of a cord guide carried by one of said presser feet and positioned between said cutting plunger and said stitching needles, and with the bottom surface thereof flush with the bottom surface of said presser feet.

8. The combination with apair of spaced standards and a pair of presser feet pivoted thereon, of means carried by said feet for forming an inclosure therebetween, intermediate theends thereof, a cord guide mem-' ber carried by one of said feet, and extending across the lnclosure and provlded with threading or guide holes extending in a plane parallel to the plane ofsaid presser feet and with the bottom surface thereof flush with the bottom surface'of said, presser feet.

9. The combination with a pair of spaced presser feet, of a cord guide carried by one of sald presser feet and extending transversely across the space between said feet and provided with threading or guide holes 7 extending in a plane parallel to the plane of.

said feet and with the bottom surface thereof flush with the bottom surface of said presser feet and a smoothing plate carried by the other of said feet. 10. In a hem stitching mechanism the combination of a pair of spaced standards carrying plate and said cord guide extending,

mg a pair of 'pivotally mounted spaced transversely across a space between said feet,

and operating independently to respectively smooth the goods and to feed the cords to the stitching mechanism.

In testimony whereof I have hereunto set my hand on this s A. D., 1919.

1 WILLIAM L11 PIER on;

econd day of January,

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