US3039412A - Ornamental zigzag stitching attachments for sewing machines - Google Patents

Description

TOSHIO KODERA ETAL ORNAMENTAL ZIGZAG STITCHING ATTACHMENTS I June '19, 1962 3,039,412

FOR SEWING MACHINES Filed :Sept. 17, 1959 8 Sheets-Sheet l I N VE N TOR S 7'05H/0 was/m, TETSUO MOR/SH/TA lfA TSUML. OTA BY Z 6 #vrromxnzv June 19, 1962 Filed Sept. 17, 1959 TOSHIO KODERA ETAL ORNAMENTAL ZIGZAG STITCHING ATTACHMENTS FOR SEWING MACHINES 8 Sheets-Sheet 2 l/VVE/VTOPS T sH/o KODERA TErsuo MOE/S/l/TA K/U'SUM/ 0E4 HTTOE/VEV June 19 1962 TOSHIO KODERA E 1 ORNAMENTAL ZIGZAG STITCHING E'pI ACHMENTS 3039412 FOR SEWING MACHINES 8 Sheets-Sheet 3 Filed Sept. 17. 1959 INVENTORS TOSH/O mas/m, "rzrsuo MOR/Sl-l/TA 4 KA TSUM/ OTA I r 1"" ATTORNEY June 19, TOSHIO KODERA ET AL ORNAMENTAL ZIGZAG STITCHING ATTACHMENTS FOR SEWING MACHINES Filed Sept 1'7, 1959 8 Sheets-Sheet 4 //V VEN TO ESL TOSH/O KODEEA? TE 751/0 MOE/S/f/FA ATTORNELY June 19, 1962 TOSHIO KODERA ET AL 3,039,412

ORNAMENTAL ZIGZAG STITCHING ATTACHMENTS FOR SEWING MACHINES Flled Sept 17 1959 8 Sheets-Sheet 5 /Nl E/VTO/?5 TOSH/O KODERA rsrsuo MoR/smm KATSI/M/ 07/4 /7 TTOR/VEY June 119, 1962 TOSHIO KODERA ET AL ORNAMENTAL ZIGZAG STITCHING ATTACHMENTS Filed Sept. 17, 1959 FOR SEWING MACHINES 8 Sheets-Sheet 6 INVENTORS TOSH/O KUDERA TE TSUO MOE/SH/ TA K/I T5UM/ 07/? ATTORNEY June 19, 1962 TOSHIO KODERA ETAL ORNAMENTAL ZIGZAG STITCHING ATTACHMEN FOR SEWING MACHINES 8 Sheets-Sheet 7 Filed Sept. 1'7. 1959 www hNN

5 H e r 02 M E/T w w 0 wKM 0M M3 2 rmk ATTORNEY 8 Sheets-Sheet 8 L S mm m C mm D G Om m 05 mm F 0 T.

Jgne 19, 1962 ORNAMENTAL. ZIGZAG STITCHING ATTACHMENTS Filed Sept 17. 1959 United States Patent 3,039,412 ORNAMENTAL ZIGZAG STITCHING ATTACH- MENTS FOR SEWING MACHINES Toshio Kodera and Tetsuo Morishita, Oaza Chlryu, Chiryu-cho, Hekikai-gun, and Katsumi Ota, Anjo-cho, Anjo-shi, Japan, assignors to Brother Seimitsu Kogyo Kabushiki Kaisha, Hekikai-gun, Aichi Prefecture, Japan, a corporation of Japan Filed Sept. 17, 1959, Ser. No. 840,693 Claims priority, application Japan Sept. 25, 1958 Claims. (Cl. 112-160) This invention relates to sewing machine attachments, and more particularly to improved ornamental zigzag stitching attachments which can be used with all types of ordinary household sewing machines.

A primary object of this invention is to provide an ornamental zigzag stitching attachment for sewing machines with simple structure and comparatively at low cost.

Another object of this invention is to provide an ornamental zigzag stitching attachment for sewing machines, the changing parts of which, that is the pattern template can be manufactured by stamping out and thus be supplied cheaply.

A further object of this invention is to provide an ornamental zigzag stitching attachment for sewing machines which makes it possible to obtain several kinds of ornamental patterns by a single template.

A still further object of this invention is to provide an ornamental zigzag stitching attachment for sewing machines which comprises providing a horizontally oscillating plate imparted with the gradual longitudinal reciprocating movement and the lateral oscillatory movement in cooperation with the up-and-down reciprocating movement of the needle bar, a presser foot mounted so as to oscillate laterally, and a template and a pin-shaped follower which are respectively fixed to either of the above horizontally oscilalting plate and the presser foot, the lateral movement of the horizontally oscillating plate being transmitted to the aforesaid presser foot by the periodical variation of the oscillating width and range in proportion to the shape of the template, said variation being caused by the relative longitudinal reciprocating movement of the aforesaid pattern template and the pin-.

shaped follower.

To these and other ends the invention consists in the novel features and combinations of part to be hereinafter described and claimed.

In the accompanying drawings: v

FIG. 1 is a cross-sectional plan view of an ornamental zigzag stitching attachment embodying this invention;

FIG. 2 is a sectional view taken on line IIII of FIG. 1;

FIG. 3 is a sectional view taken on line IIIHI of FIG. 1;

FIG. 4 is a top plan view of another embodiment of this invention;

FIG. 5 is a side sectional view of same;

FIG. 6a is a perspective view of a pattern template;

FIG. 6b, 0 and a are the perspective views of other embodiments of the pattern groove;

FIG. 7 is a top plan view of still another embodiment of this invention;

"ice

FIG. 8 is a top plan view of the essential parts thereof; and

FIG. 9 is a side sectional view of FIG. 7.

Referring more specifically to the drawings in FIGS. 1 to 3, l is the attaching member for securing the attachment to a presser bar of a sewing machine and 2 is the actuating lever which engages the needle bar of a sewing machine, 2 being the shaft which is supported by upstanding portions 9 of an attachment frame 9 secured to the attaching member 1 and the actuating lever 2 being pivoted on the shaft 2'. This actuating lever 2 is provided with a pawl 3 which is pivoted by a pin 3' and engaged with a ratchet wheel 5 by means of a spring 3". The actuating lever 2 forms a projecting lug 4 at its lower end, of which projecting lug 4 can be engaged with an upwardly bent portion 7" at the forward end of a transmission member 7. The ratchet wheel 5 is secured to the shaft 2'. 6 is the groove cam which is fixed to the shaft 2'. To the transmission member 7 there is attached a sliding plate 7 with a pin 8. And this sliding plate 7 is made to be slidable longitudinally over the attachment frame 9, being guided by a pin 10 secured to the attachment frame 9 and a slot 11 formed on the sliding plate 7, said pin 10 being fitted in said slot 11. The downwardly bent portion 7" at the rear end of the transmission member 7 engages a ratchet wheel 12 by means of a spring 16. Said spring 16 is mounted between a portion of said attachment frame 9 and a portion of the transmission member 7, thereby the transmission member 7 is pulled backwardly so that the upwardly bent portion 7" of a transmission member engages with the lug 4 and at the same time, the transmission member 7 is rotated around the pin 8 so that the downwardly bent portion 7" is urged to the ratchet wheel 12. Said ratchet wheel 12 is secured to a shaft 13 which is rotatably supported to a plate 19 fixed to the attachment frame 9. A pin 14, which has been provided eccentrically on this ratchet wheel 12, protrudes .as the fit in a laterally elongated slot 15 provided in an oscillatory plate 15. The regulating cam 17 is mounted on the attachment frame 9 as to be freely rotatable, and forms the stopping surfaces for the plate 7 consisting of a large-diametered and a small-diametered part. The oscillatory plate 15 is provided as to be freely movable on the attachment frame 9 having a longitudinally elongated slot 18 through which a guide pin 20 secured to a fixed plate 19' is fitted. To an intermediate plate 15 fitted to this pin 20, a follower 21 is provided which engages with the cam 6 after passing through the slot in the plate 15. The frame 9 is provided with a lateral slot 22 in which fits a pin 24 carried in a presser foot 23, the tip which pin 24 also fitting in a pattern groove 25' of a pattern template 25 which is secured in the oscillatory plate 15 as to be freely insertable or removable. Also, in the presser foot 23, there is provided a longitudinally elongated slot 226 into which is fitted a shaft roller 28 pivotally supported by a bottom plate 27. The bottom plate 27 is attached to the base plate '9 with a pin 29 The pin 29 is inserted into a slot 27' of the bottom plate 27 which is tightened to a proper position by a thumb screw 31 which is screwed into the attachment frame 9 through a slot 27" provided on the upwardly bent portion 27" of the bottom plate 27.

In a device such as the above the oscillatory plate 15 is imparted simultaneously a lateral movement with the pin 20 as its center by means of the cam *6 and a longitudinal movement by means of the transmission member 7, ratchet wheel 12, pin 14 and slot 15', and thus lateral oscillatory movements are imparted by the operation of an actuating lever 2 and a longitudinal back-and-forth movement is given by a plurality of the operation of the actuating lever 2. A pattern template 25 having a pattern groove 25' is fixed to the rear end of the oscillatory plate 15 as to be freely removable and changeable. Pin 24 which is fixed to a presser foot is positioned in the said pattern groove 25' projecting upwardly through a lateral elongated slot 22 which is provided in the attachment frame 9. The lateral movement of the oscillatory plate 15 imparts the oscillatory movements caused with the rollor 28 as the center to the presser foot 23 by means of the said template 25 and pin 24. The oscillatory width or oscillatory range of the presser foot 23 can be periodically changed according to the longitudinal shapes of the said pattern groove 25. In this invention the returning movement of the transmission member 7 by means of a spring 16, which imparts the back-and-forth movement to the oscillatory plate 15, has been limited by the cam 17. As a result, if the plate 7 is made to stop at the small-diametered part of the cam 17, the return stroke of the transmission member 7 becomes long, while if it stops at the large-diametered part, the stroke becomes short. Thus the distance that the transmission member 7 travels, i.e., the amount of the ratchet wheel 12 rotation, can be regulated.

Therefore, it can regulate the amount of the longitudinal movement of the oscillatory plate 15 which corresponds to an operation of an actuating lever 2. In other words, since it is possible to regulate the back-and-forth movement of a needle by a back-and-forth movement of the oscillatory plate, the number of stitches contained in a cycle of the ornamental stitches sewn by a backandforth movement of the said template 25 can be freely varied. It is also possible to adjust the oscillatory width of the presser foot 23 to the elfect of varying the width of the entire pattern by shifting the bottom plate 27 by way of loosening the said thumb screw 31.

In FIGS. 4 to 9 an embodiment of the ornamental sewing attachment having an improved actuation transmission adjusting mechanism is shown. Needless to say, this embodiment also possesses all the various above-decribed properties of this invention.

Referring to the drawings, in FIGS. 4 to 6, 101 is the attaching member tor securing the attachment to a presser bar of a sewing machine and 102 is the actuating lever for engagement with the needle bar of a sewing machine. This lever 102 oscillates about a shaft 102 supported by upstanding portions 116 of an attachment frame 116 secured to the attaching member 101 and is provided on its lower end with a push ring 103 and a pawl 104. 105 is the zigzag cam rotating around the shaft 106 supported by a plate 109 which is secured to the frame .116 and having on its upper surface a plurality of nail-like lugs 107 which engage the aforesaid pawl 104. 108 is the ratchet wheel transmission member which is mounted free- 1y slidably on the fixed plate 109. This transmission member 108 is provided with a slot 108' being fitted over the shaft 106 and its tip is pressed constantly against the side wall of the fixed plate 109 by means of a spring 110. Moreover, on this member 108 there is formed a stepped section 111 on its forward end for engagement with the aforesaid ring 103 and also at its rear end a pawl 113 engaging the ratchet wheel 112 is formeed by bending the rear end downwards. The ratchet wheel 112 being carried in the fixed plate 109 as to be freely rotatable has a pin 114 provided eccentrically therein, which pin fits in a laterally elongated slot 115" of the horizontally oscillating plate 115. The horizontally oscillating plate 115 is mounted on a base plate an attachment firame 116 as to be freely movable and is provided with a slot 117 to which is fitted a guide pin 118 which is secured to the fixed plate 109. The aforesaid cam is disposed between the walls 115' provided at the edges of this horizontally oscillating plate 115. In the attachment frame 116 a slot 119 is provided in which a pin 121 attached to a presser foot 120 fits in, and at the tip of this pin 121 the groove 123 of the pattern template 122 which is secured in the plate 115 as to be freely removable is fitted. As pattern templates to be used in this attachment, those with appropriate shapes of grooves in accordance with the shapes of ornamental stitches to be sewn will be provided for as shown in the various drawings from FIGS. 6a to 6b. That shown in FIG. 6a is for a pattern in which the width and scope of oscillations are simultaneously varied, the distances of the walls of groove 123a from the center line of the pattern template being irregularly varied. That shown in FIG. 6b illustrates one for a pattern in which the width of oscillation alone gradually changes with respect to one side, the shape being such that the distance from one of the side walls of the groove 1225b to the center line of the pattern template remains unchanged while the distance to the center line of the pattern template from the other Wall gradually changes. That shown in FIG. 60 is one for a pattern in which the width of oscillation does not change but the scope alone is made to change in steps, the groove 1230 showing no change in its groove width but being made to bend with the center line as its axis. That shown in FIG. 6d is one for a pattern in which only the width of oscillation varies an equal amount to both sides of the center line, the shape of its groove 123d being made symmetric to both sides of the center line of the pattern template. And in the presser foot 120 a slot 120 is provided wherein is fitted a shaft roller 125. A bottom plate 124 is screwed to the attachment frame 116 by means of a thumb-screw 126 as to permit a change in its position forward or backward relative to the frame 116. The rear end of the pattern template 122 is bent to form a finger grip 123'. 127 is the tightening screw for the pattern template and 128 is the screw for securing the ratchet wheel 112.

When the lever 102 is oscillated by the needle bar in the above-described attachment, the lever 102 not only rotates the cam 105 through the pawl 104 but also rotates the ratchet wheel 112 by means of the pawl 113 at the tip of the ratchet wheel transmission member 108 which is made to slide longitudinally over the fixed plate 109 by means of the ring 103. Hence, the intermediate oscillatory plate 115 is imparted simultaneously a lateral oscillating movement centering around the pin 118 by means of the cam 105 and a longitudinal gradual movement by means of said pin 114 and the slot 115" and thus oscillates while making a longitudinal movement. With this movement of the horizontally oscillating plate 115, as only the lateral oscillatory movement is transmitted to the presser foot 120 through the pin 121 which is secured to the presser foot 120, and the pattern template 122 which is secured to the above plate 115, this presser foot 120 oscillates with the roller as its center, and as a result the cloth worked is made to move laterally by means of the presser foot 120.

Accordingly, in accordance with this invention since it comprises providing a horizontally oscillating plate which is imparted longitudinal and lateral movements in cooperation with the needle bar movement and dis posing between this horizontally oscillating plate and the presser foot a pattern template and a pin whereby the horizontally oscillating plate is regulated in accordance with the dictates of the pattern template and transmitted to the presser foot to oscillate same, when compared with conventional attachments, the mechanism is possible of great simplification. Moreover, with the longitudinal and lateral movements concentrated in the horizontally oscillating plate, it being merely necessary to fit the pattern template in the horizontally oscillating plate and to couple this directly with the presser foot matters are made very simple.

Also in this invention, wherein in cooperation with the movement of the actuating lever the zigzag cam is made to rotate and the ratchet wheel is made to make a one direction intermitten rotary movement since an operative connection has been disposed between the foregoing and the horizontally oscillating plate so that the aforesaid cam and the ratchet wheel transmit respectively oscillatory and longitudinal movements to said horizontally oscillating plate, it is possible to impart with a simple mechanism simultaneously longitudinal as well as lateral oscillations to the horizontally oscillating plate by means of the oscillation of the actuating lever.

Moreover, in this invention inasmuch as the longitudinal and lateral oscillatory movements are concen' trated in the horizontally oscillating plate, for perforn'r ing ornamental sewing it is merely necessary to insert the pattern template 122 in the horizontally oscillating plate. With the means of attaching the pattern template 122 to the horizontally oscillating plate being provided for by forming a receiving section in the horizontally oscillating plate (formed by bending the edges of the horizontally oscillating plate downwards) and the template being made freely insertable and removable, there is the advantage that changes are easily accomplished.

As a modified embodiment of this invention instead of the ratchet wheel rotating disks as shown in FIGS. 7 to 9 may be employed to achieve the desired end.

In the drawings, 208 is the transmission member, being slidably mounted over a fixed plate 209' and provided with a slot 208 which fits over a shaft 206. The side of this transmission member 208 is provided with an inclined surface I which is urged by a spring 220 to be in constant engagement with an adjusting screw. And on this transmission member 208 there is formed a stepped section 211 for engagement with the aforesaid ring 203 and also a pawl 213 engaging a driving plate 12 which is reciprocably rotatable and is concentrically disposed With respect to a rotating disk 212 tobe hereinafter described, the pawl being formed by bending the tip of the transmission member downward. On the plate P there is formed a retaining member P for retaining the transmission balls S, the ball S being retained between the retaining member P' and the disk 212 as to lock the member P and the disk 212 together only in case the driving plate P rotates in one direction. S is a braking ball and is disposed between the disk 212 and a guide pin 218 to be described hereinafter and similarly locks the disk 212 and the pin 218 together only in case of the rotation of the disk 212 is in one direction, 229 being the spring for pressing the ball in contact.

In this embodiment, when the lever 202 oscillates with the movement of the needle bar, the lever 202 not only rotates the cam 205 by the pawl 204 under the lugs 207 but also by actuating the transmission member 8 slidably over the fixed plate 209 by the ring 203 rotates the. driving plate P with the pawl 213 provided at the tip of said transmission member. In this case, due to the fact that the transmission ball S is disposed between the driving plate P and the rotating disk 2.12, during the backward movement of the back-and-forth movement of the transmission member 208, i.e., when the driving plate P is rotated in a clockwise direction, the ball S remains idle and does not perform its transmission function. However, when the plate P is rotated in a counterclockwise direction the ball S wedges in between the retaining member P and the disk 212 locking the two and thus rotates the disk 212. In this instance, the ball S, being exerted a forcing out action, does not impede the transmission action of ball S. With the rotation of the disk 212 the horizontally oscillating plate 215 being imr parted simultaneously a lateral movement centering around pin 218 by the cam 205 and a longitudinal movement by the transmission member 208 will thus oscillate while making a longitudinal gradual movement.

In this embodiment of the invention, an inclined surface 2 has been provided on the transmission member 208, and an adjusting screw b has been made to engage with this inclined surface. Thus, by manipulating the adjusting screw b to change the position at which it engages the inclined plane 2, the travel of the transmission member 8 can be increased or decreased. As a result, since the amount of the movement of the driving plate P changes, the angle of rotation of the disk 212 with respect to a single reciprocating movement of the driving plate P can be changed; that is, it results in changing the number of reciprocations of the driving plate P necessary for one rotation of the disk 212. In other words, the number of up-and-down reciprocations of the needle bar included in one reciprocation in a back and-forth direction of the horizontal oscillating plate is changed.

While we have shown and described some preferred embodiments of our invention, it is to be understood that this invention is not limited to these embodiments but is capable of modification and variation without departing trom the scope of the invention as set forth in the appended claims.

What is claimed is:

1. An ornamental zigzig stitching attachment for a sewing machine having a presser 'bar and a needle bar, which comprises an attaching member for securing said attachment to the presser bar of the sewing machine, an attachment frame secured to said attaching member, an actuating lever pivot-ally supported on said frame as to be cscillatable in accordance with the up-and-down reciprocating movement of the needle bar of the sewing machine, an oscilalting plate mounted on said frame as to be movable in a substantially horizontal plane laterally as well as longitudinally, means converting the movements of said actuating lever into lateral oscillating movements of said horizontal oscillating plate, means converting a multiplicity of oscillating movements of said actuating lever into one longitudinal reciprocating movement of the horizontal oscillating plate, a presser foot pivotally supported to the lower part of the frame as to be cscill-atable in a substantially horizontal plane, and a pattern template having a pattern groove secured to said horizontal oscillating plate as to be movable with said horizontal oscillating plate in .a substantially horizontal plane laterally as Well as longitudinally, and 1a pin-shaped fo llower secured to said presser foot and made to be positioned in the pattern groove of said pattern template, whereby when the actuating lever oscillates in accordance with the up-and-down reciprocating movements of said needle bar, the pin-shaped follower secured to the presser foot, in consequenc of said horizontal oscillating plate reciprocating in a longitudinal direction while simultaneously oscillating laterally, maintains buttable engagement with the side edges of the pattern groove of said pattern template moving in conjunction with said horizontal oscillating plate so as to cause said presser foot making in a cycle lateral oscillating movements of changing oscillating widths in accordance with the configuration of the pattern groove of said pattern template.

2.. An ornamental zigzag stitching attachment for sewing machines according to claim 1 wherein said pattern template is secured as to be freely insertable or removable as well as interchangeable in a receiving section formed in said horizontal oscillating plate and said pin shaped follower is secured projectingly in said presser foot.

3. An ornamental zigzag stitching attachment for sewing machines according to claim 1 wherein regulating means for varying the ratio of the number of times the actuating lever moves to the number of longitudinal reciprocating movements of the horizontal oscillating plate is provided, whereby the number of stitches to be included in one cycle of the ornamental stitches is made variable.

4. An ornamental zigzag stitching attachment for sewing machines according to claim 1 wherein means for moving the center of oscillation of said presser foot is provided, whereby the width of Whole of the pattern may be varied.

5. An ornamental zigzag stitching attachment for sewing machines according to claim 1 having means converting the movement of the actuating lever to a longitudinal oscillatory movement of said horizontal Oscillating plate which comprises a rotating member supported as to be rotatable upon the attachment frame, means converting the movement of said actuating lever to -a one direction intermittent rotating movement of said rotating member, and an operative connection between said rotating member and said horizontal oscillating plate for making said horizontal oscillating plate to reciprocate once longitudinally by means of one complete rotation of said rotating member.

References Cited in the file of this patent UNITED STATES PATENTS 10 2,405,253 Hickey Aug. 6, 1946 2,553,514 Enos May 15, 1951 2,619,925 Sharenow et al. Dec. 2, 1952 2,652,015 Utz Sept, 15, '1953

Images