If you have ever seen the inside of a fire station. The appliances and the stuff on them have an umbilical electrical cord attached to them while in the station. When there is a shout. they just drive off and the cable pulls apart. Does anyone know what they are called? I have an Idea to put one on the new van to keep my partners mobility scooter charged up and maybe some sort of sensor to sound an alarm if the van moves when it shouldn't (I would have a switch inside to disable it obviously)