Mechanisms explained with diagrams: locks, zips, engines, escalators and the rest.https://worldofcurious.com/en-auhttps://worldofcurious.com/article/how-a-lock-actually-works/https://worldofcurious.com/article/how-a-lock-actually-works/The pin tumbler lock, the zip, the escalator corner, the thermos and the ballpoint pen. Seven everyday mechanisms explained, each with the single clever idea that makes it work.Wed, 12 Aug 2026 01:00:00 GMTHow Does That Work?engineeringmechanismshow it worksdesignEditorial Team