Sewing machine slotted thread take-up lever

Claim 1

An improved thread take-up lever for a sewing machine having a frame, an endwise reciprocatory thread carrying needle and means operating in a predetermined plane relative to said frame for feeding work material under said needle said thread take-up lever operating in a plane parallel to said predetermined plane and having a thread retaining eye and a substantially straight threading slot having an entrance from an upper exterior edge of the take-up lever to the thread retaining eye wherein the improvement comprises a prominently raised thread sloughing apex on said upper surface between said entrance to said threading slot and said thread retaining eye; a wall of uniform thickness encircling beneath and in front of said thread retaining eye, the wall having an outer thread sloughing edge and an inner circular edge forming part of said thread retaining eye; a thread sloughing edge blending into the prominently raised thread sloughing apex and tapering downwardly at any position of the take-up lever to blend with said outer thread sloughing edge of the wall encircling beneath and in front of said thread retaining eye, the thread sloughing edges being formed with minimum transverse radii of 0.02 inch to further encourage thread sloughing.