aperture 727 which accommodates the push rod 207 for the selector 706 at a proximate portion in addition a slot 728 in a planer region 730 of the selector 706 is configured to accommodate the knife retainer pin 704 and in addition the slot 728 is shaped so that when the selector 706 is pushed by the push rod 207 in an axial direction opposite its proximate end the selector 706 moves in a radial outward direction so as to allow the hook end 724 of the selector 706 to move around the thread and then to move back in a radial inward direction to capture the thread then the selector 706 is moved in an axial direction inward to place tension on the thread so that the knife 708 may efficiently trim the thread referring again to fig5 b the trimmer assembly 204 is shown positioned within the distal end of the lower arm assembly 104 as shown the trimmer assembly 204 is in close proximity to the non planer needle plate 106 so that there is very little distance between the blade of the knife 708 when extended and the inner portion of the aperture 214 of the needle plate 106 in this way a tail of trimmed thread is short which means less follow up trimming by hand and the thread length to the bobbin is relatively long allowing for easy handling as a consequence the present invention provides several advantages over the prior art those skilled in the art however can readily recognize that numerous variations and substitutions may.