Mechanism for Advancing Perforated Strip 19 February 2017, 19:00 Sorry, your browser doesn't support embedded videos, but don't worry, you can download it and watch it with your favorite video player! When moving to the right the red pawl is hold from rotation by the blue pin and pushes the orange strip to the right. « previous mechanism Sine Mechanism next mechanism » Instrument for Drafting Archimedean Spiral load comments Please enable JavaScript to view the comments.