US1977279A - Presser-foot for sewing machines - Google Patents

Description

Oct. 16, 1934. J KARLE 1,977,279

PRESSER FOOT FOR SEWING MACHINES Filed Dec. 27. 1952 2 Sheets-Sheet 1 J. D. KARLE PRESSER FOOT FOR SEWING MACHINES Oct. 16, 1934.

Filed Dec. 27, 1932 2 Sheets-Sheet 2 ammo hm: Jokn .D ffarle WWW: w M 8% Patented Oct. 16, 1934 UNITED STATES PRESSER-FOOT FOR SEWING MACHINES John D. Karle, Roselle Park, N. J assignor to The Singer Manufacturing Company, Elizabeth, N. J., a corporation of New Jersey Application December 27, 1932, Serial No. 648,862

8 Claims.

This invention relates to improvements in sewing machines, and more particularly to that that openings in the article are brought successively in the reciprocatory path of movement of the sewing machine needle Another object of this invention is to provide an improved means whereby an article having four-thread receiving opening may be attached to the fabric by parallel rows of stitches.

With the above and other objects in view; as will hereinafter appear, the invention consists in 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, Figure 1 is a front elevation of a zigzag stitching attachment with my improved presser-foot attached, showing the needle in its highest position and the position of the presserfoot of the completion of the right to left shifting movement.

Figure 2 is a fragmentary elevation, similar to Figure 1. showing the position of the presserfoot at the completion of the left to right shifting movement.

Figure 3 is a plan view of the presser-foot.

Figure 4 is a side elevation of the presser-foot.

Figure 5 is a fragmentary view of a portion of the presser-foot showing the position of the parts when a four-hole button is being attached.

Figure 6 is a disassembled perspective view of the component parts of the presser-foot.

In the embodiment of this invention selected for illustration, 1 is the usual needle-bar bearing in which is journaled the usual reciprocating needle-bar 2. Secured to the needle-bar 2 by the usual set-screw 3 is a needle-clamp 4 having a laterally extending arm 5 to which is pivoted a pawl 6 having a stop 7 and constantly urged in a counterclockwise direction by the coil-spring 8. Secured to the usual presser-bar (not shown) is a plate 9 having an upstanding inclined arm 10 and cross arm 11. Pivoted to the upstanding arm 10 at the pivotpoint12isaswinging frame 13 having a depending portion 14 and inwardly extending projections 15. Rotatably supported upon the upstanding arm 10 is a ratchet-wheel 16 rigidly connected with a cam-element 17 having a plurality of circumferentially spaced projections 18v Slidably mounted upon the laterally extending arms 11 of the plate9isaslide-bar 19 having adepending portion 20 made integral therewith. The slide-bar 19 is provided with an adjustable eccentric stop 21 and a knurled headed adjustable stop-screw 22. In the operation of the attachment, shortly after the needle 2 is out of the work the pawl 6 engages one of the teeth of the ratchet-wheel l6 and advances it one step. This causes one of the circumferentially spaced projections 18 on the cam-element 17 to contact one of the inwardly extending projections 15 on the swinging frame 13, thereby causing the swinging frame 13 to vibrate. This vibratory motion is imparted to the slide-bar 19 by the downwardly extending arm 14 of the swinging frame 13, thus causing the slide-bar 19 to vibrate laterally of the line of seam-formation. The above described Zigzag stitching attachment is substantially the same as that forming the subject of my copending application Serial No. 578,262, filed Dec. 1, 1931, to which reference may be had for a more complete description.

In the illustrated embodiment, the presser-foot comprises a shank23 which is secured to the depending portion'20 of the slide-bar 19 by a screw 24. The shank 23 is made integral witha rearwardly extending arm 25 formed with upstanding marginal lips 27 and an upstanding por-- tion 28 at its rear-most extremity. Slidably fitted into the channel defined by the marginal lips 2'7 is a sliding-plate 29. Pivotally secured to the plate 29 by ashouldered rivet 30'which extends through the elongated aperture 30" in the arm 25 is a circular button-positioning member 31 formed with four peripheral radially disposed recesses 31' of different sizes to accommodate buttons of various diameters. A washer 32 holds a flat spring 33 in the channels 34 formed in the upper face of the button-positioning member 31, the flat spring 33 overlying a portion of each recess to yieldingly hold the button to be attached in position.

The button-positioning member 31 is normally held against rotation by a spring 35 fixed to the sliding plate 39, the end 36 of the spring engaging notches 37 in the periphery of the member 31. To prevent relative movement between the plate 29 and the arm 25 the spring 35 is formed with a T-shaped end 38 provided with projections 38' which enter notches 39 formed in the upper of the marginal lips 27 on the arm 25.

For sewing two-hole buttons to fabric the slide 29 is placed in the position shown in Figure 4, the projections 38 on the arm 38 of the spring 35 entering the notches 89 in the upper edges of the lips 27. The stitch regulator on the machine is set in its extreme position so as to make the shortest possible stitch. If desired, acoverplate for the feed-dog 40 which operates through a suitable opening in the throat-plate 40 may be used. The smallest recess 31' into which the button will fit freely is selected and the button holder 31 turned about its pivot to the position indicated in Figure 1. The adjusting'screw 22 is set for enough sidewise motion so that the needle 2 will pass through the center of both holes in the button. The machine is then opedge erated in the usual manner, the button being attached to the fabric by stitches passing alternately through the holes in the button,

For sewing on four-hole buttons the slide 29 is moved to the position shown in dotted line in Figure 5. After the button has been partly attached by passing threads through'the first two holes the slide 29 is moved to the position shown in full line in Figure 5. The shifting of the slide 29 brings the othertwo holes in the button in the reciprocatory path of movement of theneedle so that the attaching operation may be completed by passing threads through the other two holes in the button. I

I have shown and described my improved attachment used for attaching buttons, it is obvious however that it may be used for attaching various types of fastening articles having thread-receiving openings, such as, hooks, snap fasteners, etc.

Having thus set'forth the nature of the invention, what I claim hereinisz- 1. A presser-foot for sewingmachines comprising a shank, an arm fixed thereto, a sliding plate carried by said arm, and an article-positioning member pivotally secured to said sliding plate, said article-positioning member being provided with a plurality of article-receiving recesses.

2. A presser-foot for sewing machines comprising a shank, an arm carried thereby, a plate slidable on said arm, an article-positioning member having a plurality of button-receiving recesses, means for pivotally securing said buttonpositioning memberto said plate, and spring means overlying said recesses.

3. In combination with a sewing machine having stitch-forming mechanism, a presser-foot having a shank, a button-positioning member formed with a plurality of button-receiving recesses, means for pivotally securing said buttonextending in a throat-plate.

positioning member to said shank, and means for vibrating said presser-foot laterally of the line of seam-formation.

4. In combination with a sewing machine having stitch-forming mechanism, a presser-foot comprising a shank, an arm carried thereby, a sliding plate overlying said arm, a button-positioning member pivotally secured to said plate, spring means for resiliently restraining said button-positioning member from movement about its pivot, and means for vibrating said presserfoot laterally of the line of seam-formation.

' 5. In combination with a sewing machine having stitch-forming mechanism, a presser-foot comprising ashank, a rearwardly extending arm carried thereby, a plate slidingly secured to said arm, spring means for preventing relative movement between said plate and said arm, a presser member pivotally secured to said plate and having a plurality of button-positioning recesses in its periphery, a Hat spring overlying said recesses, andmeans for vibrating said'presser-foot laterally of the line of seam-formation.

6. A sewing machine having, in combination, stitch-forming mechanism including a reciprocatory needle, a presser-foot comprising a shank, a button-positioning member formed with a'plurality' of peripheral radially disposed recesses or difierent sizes, a pivotal connection between said shank andsaid button-positioning member, said pivotal connection having its axis direction substantially parallel to the needle-path, and means for relatively vibrating said needle andsaid presser-foot.

7. A" sewing machine having, in combination, stitch-forming mechanism including a reciprocatory needle, a presser-foot having a shank, a button-positioning member formed with a plurality of recesses of different sizes rotatably securedto said'shank, said member being arranged with itsplane of rotation at substantially right angles to the needle-path, resilient means rotatable with said member and overlying said recesses for holding a button in position to be attached, and means for relatively vibrating said needle and said presser-foo 8. In a sewing machine, stitch-forming mechanism including a reciprocatory needle, a throatplate, a presser-foot having a shank, and a button-positioning member rotatably secured to said shank and formed with a plurality of flatbutton positioning recesses and with cloth-em gaging 'undersurfac'e portions adjacent each of saidrecesses -for-pressing the cloth upon said

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