https://www.instructables.com/Workbench-Bernoulli-Clamps/
Self-tensioning Workbench Clamps (with Pictures) - Instructables
Self-tensioning Workbench Clamps: I saw an article where a very innovative woodworker made some clamps for his workshop that worked like a cam cleat on a sail...
workbench clampswith picturesselftensioninginstructables