Why the elevator door lock is vital for safety
You probably don't think much about the elevator door lock when you're rushing to a meeting or carrying groceries up to your apartment, but it's actually the unsung hero of your daily commute. We use elevators constantly, trusting that the doors will open when they should and—more importantly—stay shut when they shouldn't. That heavy "clunk" you hear right before the cab starts to move? That's the sound of safety. It's the mechanical and electrical systems shaking hands to make sure you don't end up in a dangerous situation. ...