US2645195A

US2645195A - Embroidery attachment for zigzag sewing machines

Info

Publication number: US2645195A
Application number: US255953A
Authority: US
Inventors: Morris A Zucker
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-11-13
Filing date: 1951-11-13
Publication date: 1953-07-14
Anticipated expiration: 1970-07-14

Description

M. A. ZUCKER July 14, 1953 EMBROIDERY ATTACHMENT FOR ZIGZAG SEWING MACHINES 4 Sheets-Sheet 2 Filed Nov. 15, 1951 INVENTOR orrz's ZZuc/cer QLM ATTORNEYS July 14, 1953 M. A. ZUCKER EMBROIDERY ATTACHMENT FOR ZIGZAG SEWING MACHINES 4 Sheets-$heet 3 Filed NOV. '15, 1951 VIIIIIIII Z III s II; c -k\\\\\\ w 4732 y w 3 Z z 2 K e INVENTOR Mrrz's-fi. Zuo/rer BY v M ATTORNEYS y 1953 M. A. ZUCKER 2,645,195

EMBROIDERY ATTACHMENT FOR ZIGZAG SEWING MACHINES 4 Sheets-Sheet 4 Filed Nov. 15, 1951 l' E3 INVENTOR J2 Mfrz'sf. Zuaker' BY FM ATTORNEYS Patented July 14, 1953 UNITED EMBROIDERY ATTACHMENT FOR ZIGZAG SEWING MACHINES Morris A. Zucker, Bronx, N. Y. 7 Application November 13, 1951, Serial No. 255,953

3 Claims.

This invention relates to sewing machines.

An object of this invention is to provide an attachment for a sewing machine of that type forming a zigzag stitch which will convert the machine into an embroidery machine.

In zigzag sewing machines, means has been provided whereby the width of the stitch may be varied from a minimum to a maximum, but in order to change the width of the stitch the machine must be stopped so that the machine cannot be used in making of embroidery where the width of the stitches changes progressively. The attachment embodied in this invention is so constructed and arranged that the Width of the stitch can be varied at the will of the operator while the machine is in operation so that the stitches may be varied according to the embroidery design.

Another object of this invention is to provide,

an attachment of this kind which can be mounted on the present construction of the sewing machine in a short time, and upon removal of the attachment the machine will operate as originally designed.

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 detailed front elevation of a zigzag sewing machine havin an embroidery attachment mounted thereon constructed according to an embodiment of this invention.

Figure 2 is a plan view of the machine and the attachment.

Figure 3 is a fragmentary sectional view taken on the line 33 of Figure l.

I Figure 4 is a fragmentary sectional view taken on the line 44 of Figure 1. V

Figure 5 is a sectional view taken on the line 5--5 of Figure 2.

Figure 6 is a fragmentary sectional view taken on the line 6-6 of Figure 1.

Figure 7 is a sectional view taken on the line of Figure 5.

. Figure 8 is a fragmentary sectional view taken on the line 88 of Figures 1 or 2.

Figure 9 is a fragmentary sectional view taken on the line 9-9 of Figure 8.

Figure 10 is a fragmentary sectional view takenv on the line |-||l of Figure 5.

Referring to the drawings, the numeral l designates generally a sewing machine of conventional construction of the type designed for making zigzag stitches. The sewing machine I5 includes a vertically disposed support H; with a horizontal arm I1 and a head I8 within which the needle bar vertically reciprocates. The head |8 has a needle bar or carrier I9 movably disposed therein and the needle bar I9 is oscillated as it vertically reciprocates by means of a cam operated arm or lever 20. The arm or lever 20 extends into cam housing 2| which is provided with conventional cam means for effecting reciprocation of the arm of lever 20..

Thestructure hereinbefore described is of conventional construction and in order to provide a means whereby the zigzag stitch formed by the machine may be of varying width with the variation of the width of the stitch being effected while the machine is in operation, I have provided an elongated horizontally disposed guide bar 22 which is fixed by fastening means 23-a to the cam housing 2|. The guide bar 22 is formed with y a guide channel 23 in the forward face thereof within which a slide bar 24 slidably engages. The slide bar 24 is held against lateral movement in channel 23 by means of a pair of plates 25 secured to the guide bar 22 by fastening means 26. The forward end of the guide 22 is formed with a laterally offset extension 21, and a forwardly projecting arm 28 projects from the extension 21 and abushing or a guide 29 is carried by the arm 28, there being a laterally projecting arm 30 connected between the arm 28 and the guide bushing 29.

The forward end of the cam lever or arm 20 has a pin 3| extending loosely therethrough and the pin 3| has a slide bar 32 fixed thereto by means of a nut 32-a which slidably engages in the bushing or guide 29. Link 33 is connected between the pin 3| and a bolt 34 which extends through the forward end of the slide bar 24. The link 3| provides a means whereby the slide bar 24 will be. reciprocated with reciprocating movement of the cam arm or lever 20. A longitudinally curved lever 35 has a shaft 38 extending laterally therefrom which is journalled through theguide bar 22 and a bushing 31 fixed relative to the guide bar 22.

The curved lever 35 is formed with an elongated slot 38 and with a second longitudinally curved slot 39 communicating with the slot 38. An elongated extensible link 40 is connected between the bolt 34 and the lever 35, the rear end of link 40 being pivotally mounted on stud 4| which is fixed to and extends laterally or rearwardly' for a rocking of lever 35 with reciprocation of cam lever 20.

An elongated extensible link 42 is pivotally mounted on a stud 43 which slidably engages through the slot 39 and stud 43 has a head 44 which slidably engages in the slot 38. The rear end of link 42 is formed with an upwardly onset extension 45 through which the stud 43 loosely engages The forwardend oflink 42 is formed. with an inwardly offset extension 46 formed with a twisted terminal end 41 which is pivotally secured in a two-part pin 48 formed with a bifurcated end 49. The pin 48 includes av pair-ofstuds 50 and which are threadably connected together so that stud 50 may have relative rotary movement relative to stud 5|.

Stud 5| is formed with a reduced, pin or stud '52 which is fixedly secured in lug 53 by means of a set screw 54. The lug 53 extends from the needle carrier i 9 so that when link 42 is reciprocated back and forth needle carrier I9 will also be reciprocated.

In order to provide a means whereby the length of the reciprocal movement of link 42 may be selectively varied while the machine is in operation, I have provided a reversely bent adjusting lever 55 which is pivotally mounted on a pivot 56 carried by the guide bar 22. The rear end of lever 55 has one end of a link 51 pivotally connected therewith and the other end of link 51 is 5 pivotally connected with stud 43. A spring 58 is connected at one end with lever 55 and at the other end to an upstanding bar 59, which projects upwardly from the guide bar 22 and provides additional security for supporting bar 22.

Spring 58 constantly urges lever 55 upwardly so as to pull stud 43 upwardly in the slot 39 to a point closely adjacent the axis of the stud 36. Lever 55 is adapted to be selectively rocked downwardly by means of a shaf-t- 60 which journalled in bearings 6!. The bearings 5| are formed as part of a C-clamp 62 having a jaw 63 engageable beneath the table 64. Clamping screws or bolts 65 are threaded through the jaw 63 and bear against the lower side of table 64.

A right angularly disposed rod 66 is fixedly connected at one end to shaft 60, and the other end of rod 66 is connected with the lower end of a link 61. The link 6'! is pivotally connected as at 68 with lever 55 between the ends of the latter. A depending crank member 69 extends downwardly from shaft 60 and a horizontally disposed rearwardly projecting arm extends from the lower end of crank arm or lever 69. A plate H having a pair of bushings 12 is adjustably connected to extension 10 by means of an inverted L-shaped member 13' having a vertical side 14, which is secured in the bushings 12 by grooves 15. The L-s-haped member 13- also includes an upper horizontal side 16 which is fixedly secured in a block or coupling member 11 by means of a set screw 18. The block 11 is also adjustably secured to the horizontal extension 13 by means of a set screw 19. The two

links

40 and 42 are adapted to be extended or shortened by similar means such as the means shown in Figure 10. Each of these links is formed of apair of face-abutting

bars

80 and 8| having an elongated slot 82 through which a pair of bar adjusting screws 83 are extended. The screws 83 are threaded into bar 80 as shown in Figure 10. v

In the use and operation of this device, the conventional operating arm or lever 20, which in the '4 conventional zigzag machine is connected to the needle carrier I9, is disconnected from the carrier l9 and is connected to the pin or stud 3|. The guide bar 22 is fixed to the outer side of the cam housing 2|, and stud 48, which is carried by link 42, is connected to the needle carrier [9.

When the machine is in operation, lever or arm 20 will reciprocate slide bar 24 and link 40 will'rock lever 35 on stud or shaft 36. The width of the zigzag stitch can be closely regulated or controlled by the operator having a knee pressing against the presser plate 'H. Pressure to the right, as viewed in Figure 1, on plate H willcause rod 65 to rock downwardly so as to thereby pull lever 55 downwardly. As lever 55 is rocked downwardly, link 51 will move stud 43 downwardly inslot 39 so as to thereby vary the leverage which will be exerted on the reciprocal movement of link 42.

In the operation of the machine, the spacing between the zigzag stitches is initially reduced to a minimum so that there will be little or no spacing between the stitches. The width of the stitches can be regulated from a minimum to a maximum depending upon the position of stud 43 in the slot 39 of rock lever 35. With this attachment, the conventional zigzag stitching machine will be converted into an embroidery machine wherein the stitching can be applied to a fabric with the width of the stitching progressively increasing from a minimum to a maximum or from a maximum to a minimum, or the width of the stitching may be selectively adjusted at any point between the minimum and maximum.

What is claimed is:

1. In a zigzag stitching machine having an oscillatable needle: carrier and a cam operated operating member therefor; an embroidery attachment connected between said carrier and said member, said attachment comprising a horizontal guide bar fixed to the machine, a slide carried by said guide bar, a linkage connected between said slide and said member, a rock lever pivotally carried by said guide bar a connection between said slide and said rock lever, a stud slidably carried by said rock lever and movable lengthwise of the latter, a link pivotally connected between said carrier and said stud, and means for moving said stud relative to said lever to thereby vary the movement of said carrier.

2. In the zigzag stitching machine having an oscillatable needle carrier and a cam operated operating member therefor; an embroidery attachment connected between said carrier and said member, said attachment comprising a horizontal guide bar fixed to the machine, a slide carried by said guide bar, a linkage connected between said slide and said member, a rock lever pivotally carried by said guide bar a connection between said slide and said rock lever, a stud slidably carried by said rock lever and movable lengthwise of the latter, a link pivotally connected between said carrier and said stud, springtensioned means connected with said stud for normally urging said stud to move lengthwise of said lever in one direction, and manually operable means connected with said stud for selectively moving said stud in the opposite direction.

In the zigzag stitching machine having an oscillatable needle carrier and a cam operated operating member therefor; an embroidery attachment connected between said carrier and said member, said attachment comprising a horizontal guide bar fixedto the-machine, a slide carried by said guide bar, a linkage connected between said slide and said member, a rock lever pivotally carried by said guide bar a connection between said slide and said rock lever, a stud slidably carried by said rock lever and movable lengthwise of the latter, a link pivotally connected between said carrier and said stud, a second lever pivotally secured at one end to said guide, a link pivotally connected between said stud and said second lever, a spring connected to said second lever and constantly urging the latter to move said stud in the direction of the fulcrum of said first lever, and manually operable means connected with said second lever for moving said stud away from the fulcrum of said first lever 15 6 7 to thereby selectively vary the oscillatory movement of said carrier while the machine is in operation.

MORRIS A. ZUCKE'R.

References Cited in the file of. this patent UNITED STATES PATENTS