1892 - Joined staff of Cavendish Laboratory, Cambridge, as instrument maker; 1896 - formed own company, later known as W G Pye & Company, manufacturing scientific instruments, optical and electrical equipment; 1922 - began producing radio equipment; 1929 - radio subsiduary sold to Charles Orr Stanley as Pye Radio Ltd, later Pye Ltd; 1936 - William Pye retired, selling his interest in the business to his son Harold Pye.