cast iron electric train engin

it is a black cast iron engine it has the #302 in big numbers and the letters AC "small"under the numbers,it is 8 and a half inces long and 2.2 inches wide,it weighs 2 and a quarter pounds,original paint it has 4 wheels on the motor part but the bars to make them turn are gone,patent # on motor is 2525288 246L664 25209L6 the number inside the engine cover is PA11098,there were no other parts found for the train,were not sure if it is a steam engine or not,it has a hole in the smoke stack,the wheels are also cast iron with a white ring on the wheel,we don't know the age or location it came from or the artist name,not sure if it runs or not we don't have a way to hook it up,this is all we know about it maby you can help with some information.