US2737914A

US2737914A - Cording and embroidering presser-foot attachments for sewing machines

Info

Publication number: US2737914A
Application number: US374701A
Authority: US
Inventors: Hofgesang William
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1953-08-17
Filing date: 1953-08-17
Publication date: 1956-03-13
Anticipated expiration: 1973-03-13

Description

March 13, 1956 w. HOFGESANG 2,737,914

. CORDING AND EMBROIDERING PRESSER-FOOT ATTACHMENTS FOR SEWING MACHINES Filed Aug. 17, 1955 INVENTOR. W/'///'am Hofgesang W1TNESS= ,4 f7 ATTORNEY United States Patent CC Application "August 17,1953, Serial'No. 374:7 01 3 Claims. (Cl. 112-139) This invention relates to cording and embroidering attachments for sewing machines and has for an object the provision of a simple presser-foot construction which is adapted to handle threads of diiferent diameters and which can be readily adjusted to center a cording thread along the line of stitch formation of a sewing machine.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

In the drawings,

Fig. l is a side elevational view of a cording presserfoot embodying my invention attached to the presser-bar of a sewing machine.

Fig. 2 is an enlarged sectional view of the cording presser-foot taken on line 22 of Fig. 1.

Fig. 3 is a top plan view of the cording resser-foot shown in Fig. 1.

Fig. 4 is a disassembled perspective view of the cording presser-foot shown in Fig. 1.

Referring more particularly to the drawings, a portion of a conventional sewing machine head and worksupport 11 are shown. The head 10 supports a presserbar 12 and a reciprocatory needle-bar 13 which carries a sewing needle 14 adapted to pass through a needle hole 15 in the work-support 11. A feed-dog 16 adapted to feed work material 17 in the direction of the arrow A, Fig. 1, along a line of stitch formation extends through the worksupport 11 and is driven by a conventional feeding mechanism (not shown). The lower end of the presser-bar 12 carries a cording resser-foot 18 which is secured to the presser-bar 12 by a thumb-screw 19 threaded into the presser-bar 12. The presser-foot 18 has a shank 20 which is provided with a conventional bifurcated attaching portion 21 through which'the thumb-screw 19 passes. A sole-plate 22 formed integral with the shank 20 is engageable with work material 17 passing over the worksupport 11 and advanced by the feed-dog 16. A guideplate 23 is positioned on top of the sole-plate 22 and is secured thereto by a clamping screw 24 which passes through a slot 25 formed in the plate 23 and is threaded into the sole-plate 22. A rectangular cordor threadclearance opening 26 is formed in the sole-plate 22 to provide a means for needle-thread 27 as well as cording or embroider-

ing threads

28 and 29 to pass through the soleplate 22. A thread-guide or tang 30 formed on the plate 23 is downwardly bent to extend into the sole-plate opening 26 and forms one side of an opening 31 in the guideplate 23 which opening is of approximately the same size as the opening 26 in the sole-plate 22. A spring member 32 integral with the guide-plate 23 extends upwardly and is reversely bent to form a U-shaped spring; the free end 33 of which extends into the opening 31 in the plate 23 and the opening 26 in the sole-plate 21 to bear, yield- 2,737,914 Patented Mar. 13, .1 956 ingly,. againstwtheztang 30. The sole-plate 22 carries an inclined .toe portion 34 which is provided with two thread-

guide holes

35 and 36-.spaced vertically. one-above the other. A threading .slot 37 -.extends from-;.the ,soleplate opening 26 to .one edge of .the sole-plate 22 adjacent ot .the .toe portion 34.

From {the .above description, it is .believed vthe Operation :and .:advantages of the :presserfoot .be readilyq lnderstood by those skilledinethewart. .-:In order itlzfOlTtn. ornamental .designstof thread on the worle material 17, colored'threads, such as

threads

28 and 29, can be stitched to the material by means of a conventional lock-stitch or chain-stitch. In attaching the

ornamental threads

28 and 29 to the material 17, my resser-foot device has been found to be extremely helpful. In the illustrated embodiment of my device, two

ornamental threads

28 and 29 are drawn through the thread-

guide holes

35 and 36, respectively. The

threads

28 and 29 are then drawn in superimposed relation between the tang 30 and the free end 33 of the spring 32 and thence under the sole-plate 22 on top of the work material 17. As shown in Figs. 1 and 2, the spring 32 presses both

threads

28 and 29 against the tang 30 and holds them in position with thread 28 on top of thread 29. The slot 25 in the plate 23 is elongated perpendicularly to the line of stitch formation to permit adjustment of the plate 23 across the line of stitch formation.

It will be appreciated that varying sizes of

ornamental threads

28 and 29 can be used and that the yielding spring 32 will yield sufficiently to accommodate the desired size. However, in order to obtain proper stitching, the position of the plate 23 may be adjusted laterally of the line of stitching until the needle 14 passes approximately through the centers of the

threads

28 and 29. Obviously, if the position of the plate 23 relative to the line of stitching is adjusted for

threads

28 and 29 of large diameter and the

threads

28 and 29 are then replaced by threads of much smaller diameter, it is possible that the needle 14 may miss the small diameter threads entirely or only catch the edge of the thread unless the plate 23 is readjusted to align the

threads

28 and 29 with respect to the line of stitch formation. It should be noted that the

threads

28 and 29 may be held under tension by the hand of the operator or some other conventional tension device (not shown). This tension keeps the

threads

28 and 29 drawn snugly over the toe portion 34 and also keeps the portions of the threads between the spring 32 and the tang 30 drawn taut. From Fig. 1, it is apparent that the needle 14 passes through the

threads

28 and 29 while they are between the spring 32 and the tang 30 before the threads are compressed beneath the sole-plate 22.

It will be obvious to one skilled in the art that my device can be used with a wide variety of thread sizes to obtain a consistently good quality of ornamental stitching. Further, my device is not limited to use with only two ornamental threads but can be used with only one thread or more than two threads.

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

l. A cording resser-foot for sewing machines, comprising, an attaching shank, a work-engaging sole-plate carried by said shank and provided with an opening, a guide-plate fastened to said sole-plate, a thread guide and a spring formed integral with said guide plate for urging thread against said guide, said thread-guide and said spring each having a portion extending into said opening in said sole-plate, and means for changing the position of said guide-plate transversely relative to said sole-plate.

2. A sewing machine having a resser-bar, a reciprocatory needle-bar, feeding mechanism adapted to feed work material along a line of stitch formation, a presserfoot having a shank fastened to said pressure-bar, a resser-foot sole-plate carried by said shank, a guide-plate fastened to said sole-plate, a thread-guide carried by said guide-plate, and a spring carried by said guide-plate and yieldingly opposed to said thread-guide for urging thread against said guide, said guide-plate being adjustable laterally of said line of stitch formation.

3. A cording resser-foot for sewing machines comprising a shank, a work-engaging sole-plate carried by said shank, said sole-plate having a central opening and a threading slot extending from said opening to one edge of said sole-plate, a guide-plate fastened to said sole-plate, said guide-plate having a thread-guide forming one side of an opening in said plate, a leaf spring formed integral -with said plate, said spring having a free end extending into said opening in said plate and yieldingly opposed to said thread-guide, means for adjusting the transverse position of said guide-plate relative to said sole-plate, and a toe-portion carried by said sole-plate and provided with a thread-guide hole.

References Cited in the file of this patent UNITED STATES PATENTS Anthony Mar. 22, 1927 2,095,080 Prato Oct. 5, 1937 2,394,873 Prall Feb. 12, 1946