Abstract: A sewing machine which has a stitch-producing arrangement mounted on a housing and including a feeding device for selectively feeding the material to be sewn in one of two opposite feeding directions, and a needle reciprocable through the material and swingable transversely of the feeding directions when operated by a drive, comprises a stitch pattern control arrangement. The control arrangement includes a plurality of pattern cams rotated by the drive, a plurality of operator-controlled pattern selecting elements movable between operative and inoperative positions and a plurality of cam followers acted on by the selecting elements to engage the associated pattern cams in the operative position of the respective selecting element.

Abstract: An electronically controlled sewing machine to produce stitches and to change the relative position between the needle and the fabric to be sewn. The sewing machine comprises a first memory (ROM1) storing pattern data including the data for producing straight stitches, pattern selecting means selectively operated to select a set of pattern data of such data stored in the first memory and a second memory (ROM2) storing automatic setting information each specific to the selected pattern and controlling commonly the stitches of the selected pattern. An operator control means adjusts the control of the automatic setting information with respect to the stitches of the selected pattern and a calculating means receives the output of at least one of the second memory (ROM2) and the operator controlled means (VR1, VR2) to calculate the stitch coordinate to each of the stitches of the selected pattern.

Abstract: Arrangement for forming patterns made up of stitches in an electronic sewing machine includes a static memory comprised of a plurality of storage units, stitch forming means operatively connected to the outputs of the storage units for producing any of different stitches in dependance from the signals produced at the outputs of the memory, addressing means including an addressing counter, synchronizing means, and manually operated back stitching means including an address memory operative to cause the addressing counter to count down the storage units of the static memory.

Abstract: The user presses a stitch-type selector button in a first row of buttons, and plural illuminatable buttons in a second row of buttons light up to indicate which application patterns are based upon the selected stitch type, as a substitute for reference to an operator's manual. The user then presses one of the illuminated second-row buttons, to effect pattern selection. Upon pattern selection a set of display units and display elements becomes operative. These display numerical ranges of cloth-feed amount and zig-zag amplitude from which the user chooses, and then manually sets on the machine. Other variables thusly displayed for user guidance are what particular attachments should be used, what thread tension should be used, what presser foot, whether a single or twin needle is to be used, and others. Depending upon the selected pattern some variables may require automatic, not manual adjustment, and the affected display units indicate this to the user.

Abstract: Arrangement for forming patterns made up of stitches in an electronic sewing machine includes a static memory comprised of a plurality of storage units, stitch forming means operatively connected to the outputs of the storage units for producing any of different stitches in dependance from the signals produced at the outputs of the memory, addressing means for applying to the address signal inputs of the memory next-address signals derived from the signals produced at the outputs of the memory, synchronizing means for activating the addressing means synchroniously to operation of the stitch-forming means and back-stitching means for changing the next-address signals in accordance to the required back stitches.

Abstract: A pack of stitch-pattern cams provides a plurality of selectable stitch patterns. A cam follower is shiftable along the length of the cam pack, to different selected ones of the pattern cams. The force used to shift the cam follower is manually applied, using a cam selector knob on the exterior of the sewing machine. The selector knob is responsive to the touch of the user's hand, providing a touch-responsive signal which causes an electromagnet to automatically move the cam follower from an engaged to a disengaged position, so that the user can manually shift the follower. When the user lets go of the selector knob, the disappearance of the touch-responsive signal deenergizes the electromagnet and the follower returns to engaged position. A time-delay action is provided, so that the cam follower not move to disengaged position in response to mere inadvertent touching of the selector knob by the user.

Abstract: In a sewing machine with a stitch pattern selecting device according to the invention, the selection of stitch patterns being carried out by axial movement of a cam follower along a pack of pattern cams, such movement resulting from control by a reversible electric motor, and memory means for generating follower control signals corresponding to input pattern selection signals.

Abstract: The invention relates to a buttonhole stitch control system for a sewing machine, which previously determines the size of a button to be employed and operates the sewing machine to automatically stitch a buttonhole corresponding to the size of the employed button. According to the sewing machine of this invention, the sewing machine is previously set by the machine operator to memorize the size of a button to be employed so that the sewing machine may automatically stitch all processes of the buttonhole, namely the first bar-tack stitches, the left side line-tack stitches, the second bar-tack stitches and the right side line-tack stitches of the buttonhole, only after the first needle position has been determined by the operator.

Abstract: In a sewing machine having an electric motor and a foot control unit for driving the sewing machine, an intermittent stitching device which comprises a clutch device provided on the upper shaft, a clutch releasing device including an electromagnet and an electric control circuit for energizing the electric motor and the electromagnet via the foot controller, the electric motor and the electromagnet are energized and deenergized simultaneously by the operation of the foot control unit and to thereby intermittently cause rotation of the upper shaft of the sewing machine for producing intermittent stitches.

Abstract: A supporting member is removably attached to an upright presser bar of a sewing machine, and a zipper foot is attached to the supporting member so as to be removable therefrom. The position of the zipper foot on and with reference to the supporting member can be changed in direction transversely of the upright presser bar of the sewing machine, to thereby make it possible to move the zipper foot to positions in which the sewing machine can be used to sew a zipper, and to a position in which the sewing machine can be used for other work not involving the sewing of a zipper; this eliminates the need for removing the zipper foot at such times when the machine is not used to sew a zipper.