Abstract: A low inertia presser bar carries a retaining plate which slidably extends through an enlarged slot in a hollow main presser bar that slidably receives the main presser bar. The lowered position of the main presser bar may be adjusted to position the clearance between the slot and retaining plate above the plate, or with a selected portion of this clearance below the plate for adjustable travel of the low inertia presser bar before initiating motion of the main presser bar.

Abstract: A non-spill bobbin case device having a bobbin thread tension spring and a direct bobbin thread path extending from the bobbin thread tension spring across the bobbin case device spaced from the outer face of a bobbin flange supported in the bobbin case, and having a leaf spring with a first end attached thereto, the second end of which impinges upon the outer face of the bobbin flange. An indirect thread path is established by reeving the bobbin thread through a hook provided on the end of the leaf spring in engagement with the bobbin flange so that upon thread demand, the leaf spring is removed from the bobbin flange to permit free rotation thereof; but when thread demand ceases, the end of the leaf spring comes immediately into contact with the bobbin flange to deter further rotation thereof.

Abstract: A solenoid operated sewing machine thread trimmer with a compression spring influenced armature, a spring offsetting permanent magnet, and solenoid coil means with energizing circuits alternately offsetting the permanent magnet freeing the compression spring to shift the armature in one direction or augmenting the permanent magnet to return the armature.