Flame broiler
 A flame broiler is a commercial mechanical gas grill used to cook various products. It is in use by the Burger King fast-food restaurant chain and was also used by the Burger Chef chain.The device consists of a ladder-type conveyor chain that transported a hamburger patty over gas broiler tubes that provided a gas flame. The underside of the meat patty directly contacted the flames as the meat was conveyed through the broiler enclosure.