What was the name of Burger King's original burger-cooking oven?

The name of Burger King’s original burger-cooking oven was the Insta-Broiler.

The machine belonged to the chain’s predecessor, Insta-Burger King, founded by Keith Kramer and Matthew Burns in Florida. They acquired rights to the Insta-Broiler before opening their restaurants in the early 1950s. Unlike a conventional oven, it cooked patties in a wire basket between broilers, allowing both sides to cook simultaneously.

The original equipment helped Insta-Burger King serve burgers quickly and consistently. Sources describe it as capable of cooking more than 400 patties per hour, a major advantage for an expanding fast-food operation. The device was important enough that franchisees were required to use it.

When James McLamore and David Edgerton took control, they redesigned the equipment and dropped the “Insta-” branding. Their improved machine became the Flame Broiler, the forerunner of Burger King’s later broiling systems. A common mix-up is to answer “Flame Broiler,” but that name belongs to the later redesign, not the original oven.