The predecessor to what is now the international fast food restaurant chain Burger King was founded in 1953 in Jacksonville, Florida, as Insta-Burger King. Inspired by the McDonald brothers' original store location in San Bernardino, California, the founders and owners, Keith J. Kramer and his wife's uncle Matthew Burns, began searching for a concept. After purchasing the rights to two pieces of equipment called "Insta" machines, the two opened their first stores around a cooking device known as the Insta-Broiler. The Insta-Broiler oven proved so successful at cooking burgers, they required all of their franchises to carry the device. After the original company began to falter in 1959, it was purchased by its Miami, Florida, franchisees James McLamore and David R. Edgerton. The two initiated a corporate restructuring of the chain; the first step being to rename the company Burger King. The duo ran the company as an independent entity for eight years, eventually expanding to over 250 locations in the United States, when they sold it to the Pillsbury Company in 1967.