During the first 20 years of the X-ray business, many new names appeared. In 1901 the Western Electric Coil Co. was formed. In 1902 MacAlaster & Wiggin purchased the X-ray tube business of Swett & Lewis. Two other companies were the Radio Electric Co., which was later to be known as Snook-Roentgen Manufacturing and the Scheidel Western X-Ray Coil Co. In 1907, Homer Clyde Snook introduced the Snook apparatus, the first interrupterless device produced for X-ray work. The Snook apparatus was manufactured in England.