US3354849A - Sewing machine attachment for sewing buttons - Google Patents

Description

N 28, 1967 c. CURELLO ETAL 3 354 49 SEWING MACHINE ATTACHMENT FOR SEWING BUTTONS Filed April 15, 1965 2 Sheets-Sheet 1 INVENTORS CHARLES CURELLO BASIL S. NICKERSON XMWM ATTORNEYS Nov. 28, 1967 c. c -L ETAL 3,354,849

SEWING MACHINE ATTACHMENT FOR SEWING BUTTONS Filed April 15, 1965 v 2 Sheets-Sheet 2 FIGS INVENTORS ATTORNEYS I38 CHARLES CURELLO I BY BASIL S. NICYKERSQN 4 3 136 W M M I United States Patent 3,354,849 SEWING MACHINE ATTACHMENT FOR SEWING BUTTONS Charles Curello, East Haven, and Basil S. Nickerson,

North Haven, Conn., assignors to Mite Corporation,

New Haven, Conn., a corporation of Delaware Filed Apr. 15, 1965, Ser. No. 448,490 11 Claims. (Cl. 112-115) ABSTRACT OF THE DISCLOSURE The sewing machine attachment is adapted to sew either two hole or four hole buttons. For the latter there is a cam and a cam follower for shifting the foot longitudinally to move from a first pair of holes to a second pair of holes. The cam follower is moved out of the way by means of a two-position selector lever when sewing a two-hole button, and there is detent means to hold the selector lever in either the two-hole or four-hole position. The attachment is driven by the usual yoke with pawl and ratchet mechanism, and the ratchet wheel has a missing tooth to stop the operation after the button has a predetermined number of stitches. There is a knob to turn the ratchet wheel past the missing tooth when starting another button.

This invention relates to sewing machine attachments for sewing buttons, and more particularly to an attachment for sewing either two hole or four hole buttons.

Attachments for sewing buttons are already known. One such attachment secures a two hole button with a predetermined number of stitches, and has been improved to take care of a four hole button by a manual shift of the foot which holds the button. An attachment of this kind is disclosed in Patent No. 2,735,387, issued Feb. 21, 1956.

The general object of the present invention is to imrove such attachments. A more specific object is to provide an attachment in which the position of a four hole button is automatically shifted to change from the first pair of holes to the second pair. In accordance with a further object this shift takes place after half the desired total number of stitches have been made through the first pair of holes, the remaining stitches then being made through the second pair.

Still another object of the invention is to provide the attachment with a selector lever which makes it possible to sew either a two hole or a four hole button, with the same total number of stitches to hold the button. Other more detailed objects are to provide the selector lever with detent means to hold it in either the two hole or the four hole position, and with means to lock the position of the foot when sewing a two hole button.

To accomplish the foregoing objects, and other objects which hereinafer appear, our invention resides in the attachment elements and their relation one to another, as are hereinafter more particularly described in the following specification. The specification is accompanied by drawings in which:

FIG. 1 is a plan view of a sewing machine attachment embodying features of our invention;

FIG. 2 is a front elevational view of the attachment;

FIG. 3 is a vertical section taken approximately in the plane of the line 33 of FIG. 2;

FIG. 4 is a plan view of the foot which receives the button;

FIG. 5 is a vertical section taken approximately on the line 5--5 of FIG. 4;

FIG. 6 shows the shift cam and the transfer of its cam follower from operative to inoperative position;

FIG. 7 shows a detent carried by the selector lever;

FIG. 8 is an end view of the detent of FIG. 7;

Patented Nov. 28, 1967 FIG. 9 is a plan view of a guide on which a slide moves to shift the position of the button; and

FIG. 10 is a front elevational view of the guide shown in FIG. 9.

Referring to the drawing, and more particularly to FIG. 2, the sewing machine has the usual vertical presser bar 14, and needle bar 18 carrying a sewing machine needle 20, the latter being secured in place by a set screw 22. Referring to FIGS. 1 and 2, the sewing machine attachment comprises an adaptor 12 designed to be secured to the presser bar 14, and a fork 16 to engage the needle bar 18 of the sewing machine in order to drive the attachment. The fork 16 usually is designed to straddle the screw 22, as shown.

The attachment further comprises a foot 24 to support a button, as shown at 26 in FIG. 5. There are appropriate means driven by oscillation of the fork 16 to cause zigzag sewing through two holes of a four hole button. There is also a shift cam 30 shown in FIGS. 1, 3, and 6. This shifts the foot 24 longitudinally to change the stitching from the said two holes to the other pair of holes, the four holes being arranged in conventional fashion at the corners of a A," square.

A selector lever is movable from the solid line position 32 shown in FIG. 2 to the broken line position 32', and this makes the shift cam inoperative when sewing a two hole button.

Considering the arrangement in somewhat greater detail, a frame of U-shape cross section is fixedly secured to the adaptor 12, the said frame having sides 36 and 38 which are riveted to the rear or block-like portion 70 of adaptor 12 by rivets 39 (FIG. 2). A cam shaft 40 and a zig-zag cam 42 are rotatable in the frame. The shaft 40 is held frictionally by a resilient washer 43. The shaft 40 carries a ratchet wheel 44 which is mutilated by omission of a ratchet tooth. In the particular case illustrated the ratchet wheel has eleven teeth at the spacing of twelve, the missing tooth being located at 46, and provides eleven zig-zag loops or stitches. The fork arm 16 pivots around the cam shaft, and carries a pawl 48 engaging the ratchet wheel 44. The pawl is normally urged toward the ratchet wheel 44 by resilient means, in this case a spring wire 50.

The foot 24 preferably has a serrated bottom, as indicated at 52 in FIG. 2, so that the fabric moves with the foot and button. The conventional feed dogs of the sewing machine, not shown, are covered by a plate when the button sewing attachment is in use. The foot 24 has a button holding spring 54 secured on top, as by means of rivets 56. Both the foot and the spring are bifurcated to hold a button with its holes in an open space beneath the needle of the sewing machine.

The shank 58 (FIG. 2) of foot 24 is longitudinally slidablc in a guide or yoke generally designated 68. One end of yoke 60 is turned down at 62 and is slotted to receive shank 58. The other end might be turned down but is here shown as a separate piece 64 which is fixedly secured to yoke 60 at 66. The parts 62 and 64 have slots which slidably receive the shank 58. The yoke is pivoted on a main pivot 68 which passes upwardly through the bottom of the U-shaped frame 36, 38. The rear end 71 of the yoke is additionally supported by a shouldered screw 72, the lower end of which is received in part 71, and the intermediate portion of which passes through a slot in a rearwardly projecting part 74 of the frame. The ends of the slot are visible at 76 in FIG. 1.

The yoke 60 carries an upright cylindrical cam follower best shown in FIG. 3. A rotatable roller part 80 is carried by a post 82 which is riveted at 84 on the yoke 60. The cam roller 80 is received in the bottom of the zigzag cam 42 previously referred to, and the cam may be conventional in construction.

In accordance with the present invention a cam follower 3 slide 86 is mounted on the frame and is coupled to the foot 24 for shifting the foot longitudinally in the yoke 60. More specifically, the slide has a finger 88 which extends downward and then horizontally over the shank 58 of the foot, as shown at 90 in FIG. 3. This receives a coupling screw 92, the upper end of which is threaded in part 90, and an intermediate part of which is received in a short transverse slot best shown at 94 in FIG. 4, which slot accommodates the zig-zag oscillation of the foot.

The selector lever 32 is pivoted at 96 on the slide 86. It carries the cam follower 98 of the shift cam 30. The selector lever 32 when in the down or solid line position shown in FIG. 2 moves the cam follower )8 upward to operative position, as shown also in FIG. 6. However, when the selector lever is moved upward to the broken line position 32' in FIG. 2, the cam follower 28 is moved downward to the broken line position shown at 98 in FIG. 6, and then is out of the path of the cam 30, thus making the cam inoperative. The cam follower 98 may be riveted to the selector lever 32, and passes through an arcuate slot 100 (FIG. 2) in the slide 86 in order to reach the shift earn 30.

The inner end of the pivot post 96 acts also as a second cam follower which causes return movement of the slide 86. The cam 30 has a substantially constant diameter. The foot is always in rearward position at the beginning of a sewing operation. The follower 96 is then at maximum radius, and is not moved by the cam when sewing a two hole button.

The selector lever 32 has additional means 102 to lock the slide 86 against shifting when sewing a two hole button. More specifically, the selector lever has a somewhat heart shaped or two lobed opening (FIG. 2) through which the cam shaft 40 passes. The slide 86 has a horizontal slot 104 at the cam shaft 40 to permit the horizontal shift movement. The opening in the selector lever 32 has a lower lobe 106 which accommodates the shift movement, and an upper lobe 102 which fits around the cam shaft 40 and acts as a locking or locating means to prevent horizontal shift of the selector lever and consequently of the slide 86 and the foot 24, when the lever is raised to the position 32'.

The selector lever preferably has detent means to hold it dependably in either up or down position. Referring to FIG. 2 the upper right corner of slide 86 has two detent notches 108 and 119, and selector lever 32 has a detent piece 112 urged toward the notches by a pull spring 114. The detent element 112 is shown separately in FIGS. 7 and 8, it having a detent protuberance 116, and a lug 118 excised outwardly, leaving a guide slot 119. Lug 118 has a hole 120 to receive one end of the pull spring, and reverting to FIG. 2, the lug 118 passes slidably through a slot 122. The other end of the pull spring 114 is connected to a post which is an extension of the pivot 96 previously referred to. Referring to FIG. 1 the detent 112 is held slidably on lever 32 by means of a headed fastener 124 which passes through slot 119 (FIG. 7).

The end of cam shaft 40 carries a manually operable knob 126. This is shown in FIGS. 1 and 3 but is omitted in FIG. 2. It may be secured to the cam shaft in any desired fashion, and in the present case has a threaded shank 128 which is screwed into a threaded hole in the shaft. The knob is turned slightly when beginning the stitching of a button, in order to move the ratchet wheel 44 (FIG. 2) from the missing tooth at 46 to the next tooth, thus making the device operative. After five stitches the cam 30 shifts the foot 24 and the button carried thereby to the second pair of holes in the button, and after eleven stitches the missing ratchet tooth is reached; the zig-zag motion stops; the operator stops the sewing machine; but a continued stitch or two through one hole locks the thread.

Referring to FIGS. 2 and 3, the lower inwardly stepped part 130 of the slide 86 is horizontally slotted at 132, and is slidably guided on a special slide guide 134 secured to the frame by screws 136, the heads of which serve also to hold the slide on the slide guide. The slide guide is shown separately in FIGS. 9 and 10. It comprises a base portion 138, and a stepped or reduced portion 134, the latter receiving the slot of the slide thereon. The slide guide has holes 140, and the shouldered screws 136 pass through the holes 14-0 into the frame, thereby serving to mount the slide guide on the frame, and also to hold the slide on the slide guide.

A button when slid into position on the foot 24 is nearly located because the foot is provided with a shallow depressed seat shown at 142 in FIGS. 4 and 5. The seat is slightly elongated rather than circular, there being sides at 144 affording a slight adjustment as between a two hole button and a four hole button. The needle location is marked by marks 146 (FIG. 1) on spring 54. The leaf spring 54 holds the button in the seat 142. The adaptor 12 is made in different dimensions for use with different makes of sewing machines, and results in the marks 146 being located at the needle position.

It is believed that the construction and operation and method of using our improved sewing machine attachment, as well as the advantages thereof, will be apparent from the foregoing detailed description.

If the buttons being used are two hole buttons the selector lever is raised; the button holes are properly located in alignment with the marks 146; the knob 126 is turned slightly; and the sewing machine operated until the zig-zag motion stops. If the buttons being used are four hole buttons the selector lever is moved to its down position; the button is first positioned rearward, that is, with the pair of holes nearer the operator in alignment with the marks 146. The knob is turned slightly to make the pawl operative; the sewing machine is started and is continued as long as the zig-zag motion continues, whereupon the machine is stopped. During the zig-zag stitching the button is automatically shifted from the forward pair of holes to the rearward pair of holes, so that the stitches are divided between the two pairs of holes. Machine inertia usually causes a stich or two through one hole, which helps lock the thread.

It will be understood that while we have shown and described our invention in preferred form, changes may be made in the structure shown, without departing from the scope of the invention, as sought to be defined in the following claims.

We claim:

1. A sewing machine attachment for sewing two hole or four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a fork to engage the needle bar of the sewing machine to drive the attachment, a foot to support a button, mechanism driven by the fork to oscillate the foot for zigzag stitching through two holes of the button, a shift cam driven by the fork to shift the foot longitudinally to change the stitching from the said two holes to the other two holes of a four hole button, a two-position selector lever arranged to make the shift cam inoperative when sewing a two hole button, detent means to hold the said selector lever in either its two hole or four hole position as desired, and stop means operative on the mechanism which oscillates the foot for zig-zag stitching causing said mechanism to stop the oscillation after a predetermined number of zig-zag stitches.

2. A sewing machine attachment for sewing four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a cam shaft and a zig-zag cam rotatable in said frame, a ratchet wheel on said cam shaft, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, a foot having a serrated bottom and having a holding spring on top to hold a button beneath the needle of the sewing machine, said foot having a narrow elongated shank, a yoke having slots in which the shank of said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zig-Zag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, and a shift cam follower carried by said slide.

3. A sewing machine attachment for sewing four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a cam shaft and a Zig-zag cam rotatable in said frame, a ratchet wheel on said earn shaft mutilated by omission of a ratchet tooth, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, afoot having a serrated bottom and having a holding spring on top to hold a button beneath the needle of the sewing machine, a yoke in which said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zig-zag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, a shift cam follower carried by said slide, and a manually operative knob on said cam shaft to advance the same from its inoperable position with the pawl at the missing ratchet tooth to bring the next ratchet tooth into operative position.

4. A sewing machine attachment for sewing two hole or four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a-cam shaft and a zig-Zag cam rotatable in said frame, a ratchet wheel on said cam shaft, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, a foot having means to hold a button beneath the needle of the sewing machine, said foot having a narrow elongated shank, a yoke having slots in which the shank of said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zigzag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, a two-position selector lever pivoted on said slide, and a shift cam follower carried by said lever, said lever being movable between a four hole position in which the shift cam follower is operative and a two hole position in which the shift cam follower is moved out of the way to make the shift cam inoperative, and detent means to hold the selector lever in either its two hole or four hole position as desired.

5. A sewing machine attachment for sewing two hole or four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a cam shaft and a zigzag cam rotatable in said frame, a ratchet wheel on said cam shaft, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, a foot having means to hold a button beneath the needle of the sewing machine, said foot having a narrow elongated shank, a yoke having slots in which the shank of said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zigzag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, a twoposition selector lever pivoted on and movable with said slide, and a shift cam follower carried by said lever, said lever being movable between a four hole position in which the shift cam follower is operative and a two hole" position in which the shift cam follower is moved out of the way to make the shift cam inoperative, said lever having a locating slot receiving a fixed shaft and made operative in the two hole position to prevent shift, and said lever having a clearance slot which is transverse to the locating slot and which affords movement of the lever with the slide when the lever is in the four hole position.

6. A sewing machine attachment for sewing two hole or four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a cam shaft and a zig-zag cam rotatable in said frame, a ratchet wheel on said cam shaft, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, a foot having means to hold a button beneath the needle of the sewing machine, said foot having a narrow elongated shank, a yoke having slots in which the shank of said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zig-zag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, a twoposition selector lever pivoted on said slide, a shift cam follower carried by said lever, said lever being movable between a four hole position in which the shift cam follower is operative and a two hole position in which the shift cam follower is moved out of the way to make the shift cam inoperative, and detent means to hold the lever in either the two hole or four hole position.

7. A sewing machine attachment for sewing two hole or four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a cam shaft and a zig-zag cam rotatable in said frame, a ratchet wheel on said cam shaft, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, a foot having means to hold a button beneath the needle of the sewing machine, said foot having a narrow elongated shank, a yoke having slots in which the shank of said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zig-zag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, a two-position selector lever pivoted on said slide, and a shift cam follower carried by said lever, said lever being movable between a four hole position in which the shift cam follower is operative and a two hole position in which the shift cam follower is moved out of the way to make the shift cam inoperative, said lever having a locating slot receiving a fixed shaft and made operative in the two hole position to prevent shift, and said lever having a clearance slot which is transverse to the locating slot and which affords movement of the lever with the slide when the lever is in the four hole position, and detent means to hold the lever in either the two hole or four hole position.

8. A sewing machine attachment for sewing two hole or four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a cam shaft and a zig-zag cam rotatable in said frame, a ratchet wheel on said cam shaft mutilated by omission of a ratchet tooth, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, a foot having a serrated bottom and having a holding spring on top to hold a button beneath the needle of the sewing machine, a yoke in which said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zig-zag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, a selector lever pivoted on said slide, a shift cam follower carried by said lever, said lever being movable between a four hole position in which the shift cam follower is operative and a two hole position in which the shift cam follower is moved out of the way to make the shift cam inoperative, and a manually operable knob on said cam shaft to advance the same from its inoperative position with the pawl at the missing ratchet tooth to bring the next ratchet tooth into operative position.

9. A sewing machine attachment for sewing two hole or four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a cam shaft and a zig-zag cam rotatable in said frame, a ratchet wheel on said cam shaft mutilated by omission of a ratchet tooth, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, a foot having a serrated bottom and having a holding spring on top to hold a button beneath the needle of the sewing machine, a yoke in which said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zig-zag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, a selector lever pivoted on said slide, a shift cam follower carried by said lever, said lever being movable between a four hole position in which the shift cam follower is operative and a two hole position in which the shift cam follower is moved out of the way to make the shift cam inoperative, said lever having a locating slot made operative in the two hole position to prevent shift, and a manually operable knob on said cam shaft to advance the same from its inoperative position with the pawl at the missing ratchet tooth to bring the next ratchet tooth into operative position.

10. A sewing machine attachment for sewing two hole or four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a cam shaft and a zig-zag cam rotatable in said frame, a ratchet wheel on said cam shaft mutilated by omission of a ratchet tooth, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, a foot having a serrated bottom and having a holding spring on top to hold a button beneath the needle of the sewing machine, a yoke in which said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zig-zag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, a selector lever pivoted on said slide, a shift cam follower carried by said lever, said lever being movable between a four hole position in which the shift cam follower is operative and a two hole position in which the shift cam follower is moved out of the way to make the shift cam inoperative, detent means to hold the lever in either the two hole or four hole position, and a manually operable knob on said cam shaft to advance the same from its inoperative position with the pawl at the missing ratchet tooth to bring the next ratchet tooth into operative position.

11. A sewing machine attachment for sewing two hole or four hole buttons, said attachment comprising an adaptor to be secured to the presser bar of a sewing machine, a frame carried by the adaptor, a cam shaft and a zig-zag cam rotatable in said frame, a ratchet wheel on said cam shaft mutilated by omission of a ratchet tooth, a fork arm pivoted on said cam shaft for connection to the needle bar of the sewing machine, a pawl carried by said fork arm and engaging said ratchet wheel, a shift cam on said cam shaft, a foot having a serrated bottom and having a holding spring on top to hold a button beneath the needle of the sewing machine, a yoke in which said foot is longitudinally slidable, means pivoting said yoke beneath the frame, a cam follower carried by said yoke and engaging said zig-zag cam for oscillation of the foot, a cam follower slide mounted on said frame and coupled to said foot for shifting said foot longitudinally in said yoke, a selector lever pivoted on said slide, a shift cam follower carried by said lever, said lever being movable between a four hole position in which the shift cam follower is operative and a two hole position in which the shift cam follower is moved out of the way to make the shift cam inoperative, said lever having a locating slot made operative in the two hole position to prevent shift, detent means to hold the lever in either the two hole or four hole position, and a manually operable knob on said cam shaft to advance the same from its inoperative position with the pawl at the missing ratchet tooth to bring the next ratchet tooth into operative position.

References Cited UNITED STATES PATENTS 2,158,171 5/1939 Avis 1121l0 2,549,920 4/1951 Mosberg 112-115 2,735,387 2/1956 Baehr et al 112115 2,890,668 6/1959 Johnson et al. ll277 3,098,459 7/1963 Bono 112-114 JORDAN FRANKLIN, Primary Examiner.

G. V. LARKIN, Assistant Examiner.

Claims (1)

1. A SEWING MACHINE ATTACHMENT FOR SEWING TWO HOLE OR FOUR HOLE BUTTONS, SAID ATTACHMENT COMPRISING AN ADAPTOR TO BE SECURED TO THE PRESSER BAR OF A SEWING MACHINE, A FORK TO ENGAGE THE NEEDLE BAR OF THE SEWING MACHINE TO DRIVE THE ATTACHMENT, A FOOT TO SUPPORT A BUTTON, MECHANISM DRIVEN BY THE FORK TO OSCILLATE THE FOOT FOR ZIG-ZAG STITCHING THROUGH TWO HOLES OF THE BUTTON, A SHIFT CAM DRIVEN BY THE FORK TO SHIFT THE FOOT LONGITUDINALLY TO CHANGE THE STITCHING FROM THE SAID TWO HOLES TO THE OTHER TWO HOLES OF A FOUR HOLE BUTTON, A TWO-POSITION SELECTOR LEVER ARRANGED TO MAKE THE SHIFT CAN INOPERATIVE WHEN SEWING A TWO HOLE BUTTON, DETENT MEANS TO HOLD THE SAID SELECTOR LEVER IN EITHER ITS TWO HOLE OR FOUR HOLE POSITION AS DESIRED,

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