Popcorn, old-fashioned with a fire turned and roasted, and then bang bang bang, popcorn is ready, what is the name of this kind of machine?

Old-fashioned popcorn machine, is a pressure cooker, the name is not very sure called, there are the following names: old cannon popcorn machine / hand-cranked fire corn popcorn machine / popcorn machine / fire popcorn machine, and now it is also about 300 dollars a piece. Because the popcorn made out of lead content is relatively large, has been basically eliminated.