Actual sew length measuring device

摘要

The lengths of one or more fabric workpieces are measured by rolling a toothed measuring wheel over each fabric workpiece as it is passed through a sewing machine and conveying the revolutions of the measuring wheel to an electronic, digital counter by means of a torsion shaft whose flexibility is tuned such that while coacting with a friction brake at the counter, no reverse motion will occur due to relaxation in the fabric tension.