To stop car- jackers from having the car for long, this electric cut off was added into fuel line to shut off flow of gas to carburetor and stops engine when fuel in carburetor bowl burns out.
Circuit is from car battery to coil around tall tower to make electromagnet to lift steel ball up inside the tower area and does this for normal operation when you are driving your car. Steel ball is not shown.
A hidden switch in drivers compartment, either hand or foot operated can be turned off when in dangerous conditions, gas station environments, persons running to your car perhaps with drawn guns, ect. Tuned off the steel ball drops to restrict gas to fuel system.
Newer cars would need electric fuel shut offs to meet the design of fuel systems of particular car.
