US2818827A - Machine attachment for embroidery stitcher - Google Patents

Description

Jan. 7,1958

M. A. ZUCKER MACHINE ATTACHMENT FOR EMBROIDERY STITCHER Filed April 7. 1953 2 sheets-sheet 1 zz INVENTOR Mfi. Z 140/ 66 7' ATTORNEY51 Jan; 7, 1958 M. A. ZUCKER 2,818,827

I MACHINE ATTACHMENT FOR EMBROIDERY. STITCHER Filed April 7. 1955 2 Sheets-Sheet 2 INVENTOR MJZZ uolze r United States Patent MACHINE ATTACHMENT FOR EMBROIDERY STIT CHER Morris A. Zucker, Bronx, N. Y.

Application April 7, 1953, Serial No. 347,260

2 Claims. (Cl. 112-158) This invention relates to an attachment for a zigzag sewing machine of the type manufactured by The Singer Manufacturing Co. under the identifying number 107 W 100, and further disclosed in Patents 1,081,596, dated December 16, 1913; 1,155,050, dated September 28, 1915; 1,196,534, dated August 29, 1916; 1,232,263, dated July 3, 1917; and 1,338,074, dated Apr. 27, 1920, whereby controlled embroidery designs may be made on fabrics.

In a zigzag sewing machine the lateral movement of the needle carrier is produced by a pull arm or bar which is rocked by means of a substantially triangular cam. An adjusting means is conventionally provided for regulating the movement of the pull arm, and the embroidery attachment herein disclosed cooperates with the cam and adjusting means in automatically adjusting the position of the pull arm relative to the cam so as to produce repeated embroidery designs.

An object of this invention is to provide an embroidery attachment which will produce an even repeated design and will eliminate the knee operator or control which is normally provided in zigzag machines.

Another object of this invention is to provide an embroidery attachment of this kind wherein the design is produced from a cam, so that variation in the shape of the cam will correspondingly vary the design produced thereby.

With the above and other objects in view, my invention consists in. the arrangement, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a fragmentary side elevation of a zigzag sewing machine having an embroidery attachment constructed according to an embodiment of this invention mounted thereon,

Figure 2 is a fragmentary plan view of the machine and the attachment,

Figure 3 is a fragmentary sectional view of the interior of the head, showing the operator for the pull arm and the adjusting means therefor,

Figure 4 is a plan view of one form of cam which may be used with this attachment,

Figure 5 is a plan view of another form of cam for use with this attachment,

Figure 6 is a plan view of a circular cam for use'with this attachment,

Figure 7 is a fragmentary plan view showing an em broidery design formed with this attachment,

Figure 8 is a fragmentary plan view showing another form of embroidery produced with this attachment.

Referring to the drawings, the numeral 10 designates generally a sewing machine head of the type used in forming a zigzag stitch. The head 10 has mounted therein a cam shaft 11 on which a substantially triangular cam 12 is secured, and a pull arm 14 which is formed ice with a bifurcated inner end 13 is movable by rotation of cam 12.

Cam 12 engages within bifurcations 13 of pull arm 14. The formation of cam 12 and pull arm 14 are conventional. The length of the zigzag stitch which is produced by oscillation of pull arm 14 is regulated by means of a shaft 15 which has fixed to one end thereof a regulating lever 16. As will be seen below, the limited rotation of the shaft 15, which is provided through the manual positioning of the lever arm 16 in any of its two-pin lock positions, affords variations in stitch design but has no effect on the size of the stitch. A link 17 is releasably locked at one of its ends to shaft 15 by suitable means and extends angularly from regulating lever 16.

A link 18 has extending through one end thereof a pin or shaft 19, and shaft 19 having a screw-driver slot 19A also engages through the opposite end of link 17. The link 17 is free to rock back and forth around pin 19 with the pin 15 being employed as a fixed pivot, thereby imparting a scissor-like action to links 18 and 20 to provide linear motion to the fork 14. A link 20 is pivotally secured as at 21 to pull arm 14 and link 20 is also pivotally secured as at 22 to link 18.

An arcuate upstanding plate 23 is fixed relative to the head 10, and is provided with a plurality ofpin sockets 24 within a selected one of which a lever adjusting pin 25 is adapted to engage. When lever 16 is disposed centrally between the outer ones of the sockets 24, the zigzag stitch produced by oscillation of pull arm 14 will be formed equally on opposite sides of a medial line relative to the sewing machine needle. When pin 25 is disposed in the outer one of the sockets 24, the zigzag stitch will be produced only on one side of the center line of the zigzag stitches.

The head 10, shaft 11, cam 12, fork 13, arm 14, shaft 15, lever 16, link 17, link 18, shaft 19, screw driver slot 19A, link 20, pivot 21, pivot 22, plate 23, pin sockets 24, and pin 25, are all conventional parts of the 107 W 100 machine mentioned above and are in no way modified in mounting the present invention thereon. A manually controlled means (not shown) is normally connected to the shaft 19 to permit a skilled operator to produce embroidery designs therewith. The manually controlled means is removed from the shaft 19 and replaced with the attachment described below providing an automatic control for producing embroidery patterns which can be duplicated and repeated.

In order to provide a means whereby pull arm 14 may be automatically adjusted so as to provide an ornamental embroidery design which is repeated, I have provided a plate 26 which is fixed by fastening means 27 to the outer side of head 10. Plate 26 has extending upwardly therefrom a projection 28 which is secured by fastening means 29 in one of the sockets 24. Plate 26 also is secured by fastening means 30 to an adjacent portion of the head 10.

A fixed shaft 31 is carried by an extension 32 which projects upwardly from plate 26. A spur gear 33 is rotatably mounted on shaft 31 and gear 33 has fixed thereon a cam member 34. In the present instance cam member 34 is a circular cam, as shown in Figure 6. Gear 33 with cam 34 fixed thereon is held against endwise movement on. shaft 31 by means for a collar 35.

In order to provide for rotation of spur gear 33, a small gear 36 having a collar 37 fixed thereon is secured to the outer end of cam shaft 11. Shaft 19 which is a floating shaft, being carried by one end of link 17, has fixed thereon by a set screw 38A a lever 38 which carries a roller 39. The roller 39 engages the periphery of cam 34 and with rotation of cam 34, shaft 19 will be rocked so as to thereby produce a variable oscillation in the pull arm 14.

outer socket 24, shown in Figure 1, the design shown at i 45; in Figure 7 'willbe produced. As shown in Figure 7, there are two of these similar designs 45'andit will be understood that the second one of these designs is produced byfirst producing one of the designswhichineludes one-half-of the oscillations of. the pull' arm and thenturning the fabric around 180 and moving. the fabric beneath the needle at a point spacedfrom the first design. The cam 34b when secured to gear 33 will iproduce-an embroidery design as indicated'at 46 in Figure. 8.

Thisdesign, shown in Figure 8, is formed of inner zigzag stitchesfwbich are relatively narrow, and outer zigzag stitches which are relatively long. It will be understoodv thatwhere double needles are used on the machine, different colored threads may be used .so as to produce an embroidery design which is formed of several colors.

To adjust this attachment to effect variations in stitch design size, the set screw 38A is loosened to unlock the lever,38 from the shaft19. A screwdriver blade is then inserted in the slot 19A and is turned in either direction. Since the link 18 is fixedly screwed on the shaft 19 the aforementioned adjustment provides variations in the total travel of the links 18 and 20 to either increase or decrease the oscillating linear movement of the fork 14 thereby providing almost infinite variations in stitch size within the limitations of the machine itself. After the desired setting has been obtained, the set screw 38A is tightened to lock the lever 38 to the shaft 19. As the machine is operated, the roller 39 follows the contour of the cam 34'and in so. doing turns shaft 19 and through. the linkage. arrangement provided by the links .17, 18 and.

20 produces an embroidery design of the desired size.

The above described attachment affords the operator a wide variety of embroidery designs which are accomplished in a completely automatic manner, and requires no special skill on the part of the operator. Of singular importance is the fact that this attachment is readily installed'and easily removed from the model 107 W 100 of the Singer sewing machines and requires no significant alteration of the machine itself which would tend to invalidate it for use as originally intended by the manufacturer.

I do not mean to confine myself to the exact details ofconstruction herein disclosed, but claim allvariations falling within the purview of the appended claims.

What is claimed is 1. An attachment for zigzag sewing machines of the type having a head, a cam shaft mounted in said head, a cam fixed to said cam shaft, a bifurcated pull arm engaging said cam, a link pivotally secured to said pull arm, a second link pivotally secured to said first link, a shaft spaced from said cam shaft, said second link having one end thereof fixed to said shaft, a third link having one end journalled on-said shaft, a second shaft journalled'in said head and having one end thereof fixedly secured to the opposite end of said third link, a regulating lever secured to said second shaft, a second lever fixed on said first shaft, a fixed-shaft mounted onsaidhead, a second cam journalled on said fixed shaft and engaged by said second lever, a gearfixed to said second-cam, a drive gear fixed on said cam shaft and meshing with said gear on said second cam, and means for driving said cam shaft for rotating said first cam and through said gears rotating said second cam.

2. An attachmentfor zigzag sewing machines of the type having a head, a cam shaft mounted in said head, a cam fixed to said cam shaft, a bifurcated pull arm engaging said cam, a link pivotally secured to said pull arm, a second link pivotally secured to said first link, a shaft spaced'from said can": shaft, said second link having one endthereoffixed to said shaft, a third link having one end journalled on said shaft, a second shaft journalled in said head and having one end thereof fixedly secured to the opposite end ofsaid third link, a regulating lever secured to said :second shaft, a second lever fixed on said first shaft, afixed' shaft.mounted on said head, a second cam journalled on said fixed shaft and engaged by said second lever, a gearfixed to said second cam, a drive gear fixed on said camshaftand meshing with said gear on said second cam, means for driving said cam shaft for rotating said first cam and through said gears rotating saidsecond cam, spring means biasing said second lever toward said second cam, and a roller mounted on the end of said second lever for engaging said second cam.

References ,Cited in the file. of this patent UNITED STATES PATENTS 1,083,178 Arendt Dec. 30, 1913 1,267,594 Rogers May 28, 1918 1,338,074 Eames et'al. Apr. 27, 1920' 1,551,453- Aronson'et al. Aug. 25, 1925 2,029,942 R-apaport et al. Feb. 5, 1936 2;308,465 Hale Jan. 12, 1943 FOREIGN PATENTS.

695,441 Germany Aug. 24, 1940

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