Drawing Trapezium With Reuleaux Triangle 17 February 2019, 19:30 Sorry, your browser doesn't support embedded videos, but don't worry, you can download it and watch it with your favorite video player! The cam profile is a Reuleaux triangle with rounded vertices. The mechanism is used for moving film in cameras. « previous mechanism One Way Clutch (Press) next mechanism » Archimedean Spiral Gear and Pin Gear load comments Please enable JavaScript to view the comments.