Abstract: Provided is a buttonhole switch mechanism of a buttonhole sewing machine including a buttonhole presser mounted on a lower end of a presser bar of the sewing machine and having a presser frame, a buttonhole switch mechanism disposed on an arm section of the sewing machine, a feed dog disposed below the buttonhole presser to move cloth, a sewing needle forming stitches in the cloth with vertical movement, a controller performing control on the movement of the feed dog and the sewing needle, a fixing member fixed to a non-movable part of a sewing machine main body, a mount supported so as to be movable in the front-and-rear direction with respect to the fixing member, an adjustment mechanism adjusting and fixing the relative positions of the fixing member and the mount in the front-and-rear direction, a lever member supported by a rotary shaft provided at the mount, and the detection switch fixed to the mount.

Abstract: A sewing machine that includes an image capturing device and a sewing device. The image capturing device captures an image, and the sewing device sews a buttonhole having a length in accordance with a shape of the button, based on an image of a button captured by the image capturing device.

Abstract: A jig for holding an accessory having at least two sets of thread holes while being stitched on a sewing machine includes an attachment plate attachable to the sewing machine in predetermined relationship with respect to the needle of the sewing machine and includes a sliding bar held in slidable relationship with the attachment plate. Also included is a first location-determining device to secure the sliding bar in at least two predetermined positions, a holding device attached to, and extending from, the sliding bar to a location below the needle of the sewing machine, permitting the alignment of at least two sets of thread holes on the accessory with the needle of the sewing machine when the sliding bar is moved to a desired location, and an alignment system having a guide template affixed to the holding device. An indicator arm is affixed to the attachment plate which is aligned with a desired location on the guide template in order to indicate alignment of the needle of the sewing machine.

Abstract: Disclosed is a sewing machine attachment which is adapted to be detachably attached, after opening a part of a machine bed, to the portion of the machine bed in the vicinity of the opened part, and to be operatively connected to a motion mechanism in the machine bed through the opened part of the machine bed. The attachment actuating mechanism includes a connection arm which is adapted to extend through the opened part of the machine bed into engagement with the motion mechanism in the machine bed, when a lock lever is moved to a position for locking the attachment to the machine bed. The connection arm is further adapted to be disengaged from the motion mechanism in the machine bed, as the lock lever is moved back to a position for releasing the attachment from the machine bed.

Abstract: Disclosed is a zigzag sewing machine in which a trimming device for trimming the marginal edge of a work fabric is removably disposed at a predetermined position on a machine bed so that the trimming device is driven in relation to the operation of the sewing machine. The zigzag sewing machine comprises a switching device for changing the field position of the needle oscillation and an operated member for actuating the switching device in relation to the disposition of the trimming device at the predetermined position. In this zigzag sewing machine, while overedge stitching is performed by using the trimming device, the field position of the needle oscillation is set so that zigzag stitches having a desired stitch width are always placed along and over the marginal edge of the work fabric trimmed by the trimming device.

Abstract: An improved visual aid mechanism for a presser device for facilitating the making of buttonholes. The mechanism will sense and indicate to the operator the approaching end of the first leg of a buttonhole being sewn whose length has been preset by the operator. This invention utilizes flexible fingers which are substantially deflected by an adjustable stop member to provide a magnified visual indication. Thus the operator may stop the sewing operation very precisely resulting in buttonholes of consistently uniform length and quality.

Abstract: A buttonhole controlling device for use in causing a sewing machine to form a buttonhole of a selected length, and including means for effecting a reversal in the direction in which material is fed under a sewing needle as required for the formation of a final leg of the buttonhole, is provided with an adjustable stop enabling an operator to precisely define the end position of the final leg and so assure closure of the buttonhole without overlap.

Abstract: A finger mounted on the work engaging plate that interlocks with the work engaging presser foot of a buttonhole sewing presser device to effectively prevent travel of the work engaging shoe when the presser foot is raised for work insertion. In addition the finger will prevent accidental disengagement when the buttonhole sewing presser device tilts after the presser foot has been raised.

Abstract: An interlock between the work engaging presser foot and the work engaging shoe of a buttonhole sewing presser device which is effective to prevent travel of the work engaging shoe when the presser foot is raised for work insertion. In addition a latch is provided effective to prevent accidental disengagement of the interlock when the buttonhole sewing presser device tilts after the presser foot has been raised.

Abstract: A buttonhole gauging presser device usable on sewing machines with or without automatic buttonhole mechanisms. This presser device includes button engaging projections which position both a cam for actuating an automatic buttonholing mechanism as well as visual indicating means. At the start of buttonhole sewing the visual indicating means occupies a position in advance of the sewing needle or indicia on the presser foot, and then as the buttonhole is stitched, the visual indicating means moves into alignment with the needle (or indicia) which serves a signal to the operator of a manual sewing machine that an operator-initiated action is required to have the sewing machine create a buttonhole end and reverse direction.

Abstract: An attachment for sewing machines allows any sewing machine to stitch double-knit and other stretch fabrics properly by overlapping three stitches before making a successive stitch in a line of stitches. The attachment includes a mounting bar which is secured to an accessory bar on the sewing machine and a first lever pivoted on the mounting bar which oscillates as the needle of the sewing machine reciprocates. A second lever, with fabric engaging reverse feed dogs, is also pivoted on the mounting bar, and is rotated by the first lever through a ratchet mechanism, which allows the first lever to engage and rotate the second lever every third stitch. Upon rotation, the second lever moves the reverse feed dogs into engagement with the fabric to push the fabric in the reverse direction a length of one stitch. When the operation of this attachment is coordinated with existing bottom feed dogs on the sewing machine, three overlapped stitches are made for each one-stitch advance of the fabric.

Abstract: A buttonhole stitching device for a zigzag sewing machine, the buttonhole stitching device having a forked member which is arranged on a base plate. The forked member consists of a forked front portion which forms a long notch having a width corresponding to the amplitude of movement of a sewing machine needle and a rear portion provided with a shroud frame wall defining a nearly rectangular aperture. The base plate is provided with a hook at its front edge which is fitted into the long notch of the forked member and the forked member reciprocally moves along the base plate under the guidance of the hook provided thereto. A cam plate is removably fitted into a walled or framed aperture formed on the base plate, and the cam plate is provided with a loop channel surrounded by a rack at the under surface thereof. The shape of the loop channel corresponds to the shape of a buttonhole to be stitched.

Abstract: An automatic buttonhole sizing device for sewing machines which includes a sensing wheel which by resting on the material being sewn, turns as the material is fed and has a rotatable setting ring which programs the size of the buttonhole. Incorporated in the sensing wheel are one fixed and one movable tab for holding any one of many buttons of various sizes therebetween, wherein the size of the button determines the position of the movable tab. The movable tab is so associated with the setting ring of the sensing wheel that when the two tabs are positioned touching opposite sides of a button by rotating the setting ring, the size of the buttonhole is automatically determined from the final positioning of the setting ring.

Abstract: There is disclosed a device to limit the travel of a buttonhole attachment for a sewing machine wherein the button for which the hole is made serves to set the limit of travel. The device includes a bracket having a front wall and a back wall with the front wall fixed to the buttonhole attachment, a limit which is positioned in front of the front wall and fixed to a shaft which in turn is movably attached to both the front wall and the back wall of the bracket and biased to move toward the front wall, and a stop fixed to the shaft between the front wall and the back wall, with the bracket adapted to provide access to insert a button between the front wall and the stop.