Mind sparked on Instagram: "The auto-locking gate is a brilliant example of simple mechanical engineering solving a common problem: the unsecured or forgotten gate. Instead of relying on electronics, it uses gravity, levers, and springs to automatically lock every time the gate closes. 🚪🔒 At its core, a weighted lever or spring-loaded latch stores energy as the gate swings shut. Once in position, the weight drops or the spring releases, moving a bolt or latch into the strike plate, securing th