Abstract: A shock absorbing apparatus for loading a magnetic disc onto a disc drive comprises disc positioning pins equipped with shock absorbing devices which effectively load the magnetic disc smoothly, without shocks. The pins hold a collar in place using a coil spring and a ball placed in a hole drilled into the side of the pin. The collar is thus allowed to move up and down freely, its motion controlled by a sliding disc holder. The collar thus absorbs shocks to the magnetic disc normally encountered when loading such discs on a conventional disc drive.

Abstract: A displacement transmitting apparatus comprising a shaft hole which throttles by piezoelectric effect, and a shaft slidably inserted into the shaft hole engaged with a driving means which advances steppingly by mechanically amplified piezoelectric effect. On-off controlling of electric voltage for the displacement transmitting apparatus and the driving means causes the shaft to advance or conversely causes the driving means to advance where the shaft is fixed.

Abstract: In a two-needle overedge sewing machine, a thread chain guide recess is formed for positioning the thread chain at a given position on the throat plate so that the thread chain is spaced apart from the outer needle descending point. The thread chain guide recess may be made at a tip portion of an outer finger of the throat plate or at a tip portion of an outer finger of a presser foot. Furthermore, the thread chain guide recess may be formed by the combination of the outer finger of the throat plate and the outer finger of the presser foot. In an improved embodiment, a thread chain guide groove is formed in an upper surface of the outer finger of the throat plate so that the thread chain is substantially fully received therein.

Abstract: This invention relates to a sewing machine control device which precisely and effectively stops a sewing machine at the termination point of a seam. The sewing machine control device comprises operation means (LSW) for producing an actuation signal or a stop signal, needle position detector means (NP), workpiece detector means (5, WS) operatively connected to said operation means and an electrical circuit operatively connected to said workpiece detector means. When the operation means drives or stops the sewing machine and the workpiece detector means detects the trailing end edge of a workpiece, the electrical circuit automatically stops the sewing machine.

Abstract: This application discloses an inked ribbon operation device in a printer in which a carriage having printing means is moved in parallel to the platen to perform printing, a reversible motor is supported on the carriage, a pair of spaced ribbon shafts are rotatably supported on the carriage for re-winding the ribbon from one ribbon shaft to the other ribbon shaft, a guide member is supported for holding the inked ribbon between the pair of ribbon shafts for moving the ribbon between the printing position and printed area viewing position, ribbon feed means is disposed between the motor and the ribbon shafts for rotating the ribbon shafts in response to the rotation of the motor in the forward direction, first connection means is disposed between the motor and guide member for moving the guide member to the raised position in response to the rotation of the motor in the forward direction, second connection means is disposed between the motor and guide member for moving the guide member to the lowered position i

Abstract: A sewing machine automatically sews a seam which ends at a desired point. The last n stitches, preferably the last two stitches, are of substantially equal length. A counter counts pulses while the work is being fed to the needle. The machine detects when the trailing edge of the work passes by a predetermined location ahead of the needle. Upon such detection, the contents of the counter are used to calculate the proper stitch pitch for the last two stitches. The stitch pitch is varied as necessary during sewing of the last two stitches in the seam.

Abstract: A stopping device for an eyelet button holing machine provides a stopper arm which plunges into a recess portion of a stopper cam positioned coaxial to the main shaft. To absorb the stopping impulse, extra wheel cams are provided coaxial to the main shaft which induce the stopper arm to be inclined such that its position causes a clutch pulley to contact with a low speed pulley and then the stopper arm plunges into the recess portion of the stopper cam. Thus, the machine is stopped in two steps and the stopping impulse force is effectively alleviated.

Abstract: An automatic embroidery machine operated according to stitch data stored in a memory device provides a secondary central processing unit, a secondary random access memory, and a secondary code input means such that subsequent stitch data may be input during current stitch work thereby increasing the work efficiency of the embroidery machine.

Abstract: A thread tension control device for overedging sewing machines wherein each needle thread tension controller and each looper thread tension controller provide two springs designed to clamp two tension discs wherethrough a thread is passed. A slide plate, by its horizontal sliding motion, either causes the two springs to be active or causes one of the two springs to be released thereby obtaining either strong or weak thread tension. A workpiece end detector defines either an overedging process or thread chain forming process and sends a signal to actuate the horizontal sliding motion of the slide plate. Thus, the proper thread tensioning for each needle thread and each looper thread for either an overedging process or a thread chain forming process may be automatically adjusted.

Abstract: An automatic stitch pitch adjusting apparatus for a sewing machine allows the last stitch point to be terminated at a pre-set point. Three workpiece-end sensors are positioned respective a needle hole position to precisely calculate the required actual stitch line length. Reference signals generated by rotation of a main shaft are used to calculate both the required number of stitchings and the adjusted stitch pitch to terminate stitching at the pre-set point. Where the workpiece end line is not normal against the feeding line, the pre-set margin distance is adjusted to calculate the actual required stitching line length to the last pre-set point.

Abstract: A paper sheet feeder includes an input roller, an interposed roller, an output roller and a motor. The interposed roller serves both as a paper-feeder and a paper-stopper by changing the drive direction of the motor. A one-way clutch is provided at the interposed roller and is effective to allow the roller both to stop the paper and to drive the paper. The input roller is also provided with a one-way clutch. A single motor effects both sheet removal from a pile and sheet feeding.

Abstract: A method and apparatus for inputting stitch patterns by way of a digitizer is effective to record stitching patterns which involve skipping and which extend beyond the digitizer board. In a method aspect, where stitch patterns involve skipping and the drawings of the patterns exceed beyond the digitizer plotting board, a method is provided including the steps of commanding scale-down input coordinate values and converting the input coordinate values to scale-up values to recover the reduced value. In an apparatus aspect, an input device is provided comprising a digitizer for drawing stitching patterns, control circuitry for performing scaling function, and command generating circuitry for commencing the scaling activity.

Abstract: The present invention relates to an improvement in the home point detection of a motor for a sewing machine wherein the motor is used to rotate a cam into a predetermined feed pitch formed on the cam, and change in the quantity of work piece feeding that corresponds to such feed pitch is transferred to a feed dog through a linkage means. Respective feed pitches are formed in each of the regions of the cam, whereas the detecting position of home point of the motor is set in a suitable position. Moreover, the rotating direction of the cam toward the detecting position of home point is reversed in accordance with each of the regions. Accordingly, the returning speed of the motor back to the detecting position of home point is made fast and only one home point detector is used.

Abstract: A button sewing machine allows simultaneous sewing of both a stay button and a surface button to a workpiece and conducts button-neck-wrapping by inclining both buttons with a workpiece. A needle is arranged to travel between an upper needle bar spindle and a lower needle bar spindle, being received by each spindle alternately per each needle stroke, such that buttons are sewn in a manner closely simulating "hand" sewing. A worktable is arranged to move in both the X and Y directions in accordance with the button hole pitch distance in synchronization with the up and down motion of the needle.

Abstract: An apparatus for lifting the presser foot of a sewing machine prevents the bar guide bracket from rotating outward even when the presser foot is unintentionally raised due to a thick workpiece. As an additional safety interlock, the presser bar guide bracket is prevented from dropping down when the presser foot is rotated to provide space for changing the needle or setting the thread.

Abstract: This invention relates to a presser foot lifter in a sewing machine. The presser foot lifter comprises a pressure relief mechanism for lessening the force of a spring means adapted to bias a presser foot towards a throat plate, a presser foot drive mechanism for lifting the presser foot and a manual operation mechanism operable by the operator. When the operation mechanism is actuated, the pressure relief mechanism operates to lessen the force of the spring means and the presser foot drive mechanism operates to lift the presser foot. According to the present invention, the presser foot can be lifted to any desired height.

Abstract: A needle thread guide provided at a needle bar frame and located adjacent to the needle entry protects the needle thread from being stuck by the needle when the workplace is fed during button holing. The guide guides the needle thread outwardly when the needle descends, thus the needle thread positioned lower than the needle eye is protected from being stuck by the needle. The guide is associated with the oscillating motion of the needle, but its direction of oscillation is opposite to the direction of needle oscillation, and its amplitude is almost twice the amplitude of the needle.

Abstract: A button feed tape used to supply buttons for a button stitching machine comprising an upper sheet and a lower sheet with the buttons sandwiched therebetween. The upper and lower sheets provide openings to expose the buttons and to allow easy separation of the sheets from the buttons after the buttons are stitched. The button feed tape is fed by sprocket holes provided along the sides of the button feed tape.