Abstract: A device for operating several sewing functions is provided with a single control disk with curved paths arranged peripherally and facially on the control disk for acting radially and axially. The control disk is driven by a stepper motor and allows individual or several functions to be executed during the rotary movement as well as temporarily stopping others.

Abstract: A method and device for controlling movement of the needle in a sewing machine (1) based on a detection device (27), which detects the movements of the visible surface of the manually displaceable article to be sewn (3) is provided. The stitch formation of the sewing machine (1) is controlled by detected changes in positions of the article to be sewn (3) in connection with a predetermined stitch length. The detection device (27) can be integrated into a sewing foot (23) entirely or partially.

Abstract: A device (1) with a wire holder (13) for securing the upper thread loop (25) after the threading of the upper thread (23) through the eye (5) of a sewing machine needle (3) is provided. The wire holder deflects a progression of the two thread legs of the thread loop (25) upwards and thus securely holds the upper thread (23) in a hook chamfer at the hook (7).

Abstract: A hook (15) of a sewing machine (1) is pivotably mounted on a hook carrier (25). The hook (15) is moved from a working position (X) into a bobbin case withdrawal position by a pivoting movement of the hook carrier (25). The pivoting movement displaces the hook (15) and the bobbin case (17) towards or above the opening which is opened by the flap (13) in the lower arm (13). In this way, the withdrawal of the bobbin case (17) or the bobbin is significantly simplified.

Abstract: A device (1) with a wire holder (13) for securing the upper thread loop (25) after the threading of the upper thread (23) through the eye (5) of a sewing machine needle (3) is provided. The wire holder deflects a progression of the two thread legs of the thread loop (25) upwards and thus securely holds the upper thread (23) in a hook chamfer at the hook (7).

Abstract: A device and method for creating sewing data using sample patterns (4) is provided in which relative movement between a detection device (27) and a sample pattern (4) is detected using an optic sensor, such as the one used in computer mice. The detection of movements is independent from any potentially visible edges. A processing unit (32) converts the movement data detected into sewing data, which can be saved in a storage unit (34, 56). Using said sewing data, a sewing machine can create sewing patterns, which are proportional to the ones of the sample pattern (4).

Abstract: A method and the device for minimizing stitching faults in embroidery devices (1) is provided, which includes a drive for moving the material holder (13), with an article to be sewn (11) being stretched therein, based on the knowledge that such stitching faults frequently can be explained by oscillations of the article to be sewn (11) and the material holder (13) due to rapid accelerations. Various effects, such as different types of articles to be sewn, changing weights, and friction ratios can cause a change of the oscillation behavior. One or more sensors (29, 43, 44) are provided and arranged such that they can detect the oscillation of the article to be sewn (11) and/or the material holder (13). The control of the drive and/or the sewing needle (23) occurs depending on the detected oscillations such that deviations of the stitching site from the predetermined target value is minimized.

Abstract: A device for operating several sewing functions is provided with a single control disk with curved paths arranged peripherally and facially on the control disk for acting radially and axially. The control disk is driven by a stepper motor and allows individual or several functions to be executed during the rotary movement as well as temporarily stopping others.

Abstract: In an upright (3) of a sewing machine (1), a thread spool holder (24) is mounted in a recess (13) so that it can pivot out of the recess (13). On this holder, thread spool pins (23) are placed, as well as an arm (35), on whose upper end thread guidance elements (33) are fixed. For use, the cover (15) which covers the thread spool holder (24) in the stowed state is opened, and the thread spool holder (24) is pivoted out from the recess (13).

Abstract: A method and device for controlling movement of the needle in a sewing machine (1) based on a detection device (27), which detects the movements of the visible surface of the manually displaceable article to be sewn (3) is provided. The stitch formation of the sewing machine (1) is controlled by detected changes in positions of the article to be sewn (3) in connection with a predetermined stitch length. The detection device (27) can be integrated into a sewing foot (23) entirely or partially.

Abstract: To determine the thread supply on a lower-thread bobbin (17), holes (19) are arranged in the shape of a spiral in a flange (21) of the bobbin. Light from a light source (35), which is directed towards the flange (21), is reflected only by those holes (19), behind which there is no longer any thread, so that the light beams (36) reach the rear flange (22) and can be reflected therefrom and received by the light receiver (39).

Abstract: The hook (15) of a sewing machine (1) is mounted so that it can move on a hook carrier. Through a sliding movement of the hook carrier, the hook (15) is brought from its operating position into a bobbin case removal position. Through the sliding movement, the hook (15) with the bobbin case (17) is placed at or above the opening, which is created by the flap (13) in the lower arm (5). In this way, the removal of the bobbin case (17) or the bobbin is made considerably easier.

Abstract: In an upright (3) of a sewing machine (1), a thread spool holder (24) is mounted in a recess (13) so that it can pivot out of the recess (13). On this holder, thread spool pins (23) are placed, as well as an arm (35), on whose upper end thread guidance elements (33) are fixed. For use, the cover (15) which covers the thread spool holder (24) in the stowed state is opened, and the thread spool holder (24) is pivoted out from the recess (13).

Abstract: In the top transport device of a sewing machine, the top transport foot (15) moves in a vertical slot (27) in the arm (17), with which the top transport foot (15) is driven. This arrangement enables the top transport foot (15) to be displaced upwards into the rest position, so that accessories can be fixed to the presser bar (11).

Abstract: An arrangement for changing bobbins in sewing and embroidery machines is arranged on the cover (13) on the lower arm of the sewing machine (1). With a push-button (45) and a slide (19), the bobbin case (71) with the bobbin (73) lying therein is released from the hook base (75) and made accessible to outside of the sewing machine (1) when the cover (13) is opened.

Abstract: A locking device for bobbins (3) in the hook base (1) of a sewing machine is provided by a locking element (21) that can move in the axial direction. The locking element (21) is spring-loaded and lies in an ejection and loading position inclined to the rotational axis (X) of the hook base (1), so that the bobbin (3) can be placed or removed. As soon as the bobbin (3) is inserted into the hook base (1), the locking element (21) tips and locks on the bobbin rod (9).

Abstract: A method and device for creating uniform stitch lengths in an article being sewn by detecting actual feeding increments of the article using a sensor. With this information, the sewing or embroidery machine is controlled to provide generally uniform stitch lengths.

Abstract: A method and the device for acquiring and processing measurement quantities in a sewing machine (1) using at least one camera (25), situated on a sewing machine (1), for the acquisition and processing of image data for sewing machine elements and sewing elements. An image processing unit connected downstream from the camera (25) processes the images supplied by the camera (25), taking into account data stored in a target quantity memory, and influences the behavior of the machine control unit dependent on the result of the processing.

Abstract: A locking device for bobbins (3) in the hook base (1) of a sewing machine is provided by a locking element (21) that can move in the axial direction. The locking element (21) is spring-loaded and lies in an ejection and loading position inclined to the rotational axis (X) of the hook base (1), so that the bobbin (3) can be placed or removed. As soon as the bobbin (3) is inserted into the hook base (1), the locking element (21) tips and locks on the bobbin rod (9).

Abstract: A method and device for creating uniform stitch lengths in an article being sewn by detecting actual feeding increments of the article using a sensor. With this information, the sewing or embroidery machine is controlled to provide generally uniform stitch lengths.