Trevor Graham Baylis (13 May 1937 – 5 March 2018) was an English inventor best known for the wind-up radio. The radio, instead of relying on batteries or external electrical source, is powered by the user winding a crank. This stores energy in a spring which then drives an electrical generator. Baylis invented it in response to the need to communicate information about AIDS to the "people of Africa". He ran a company in his name dedicated to helping inventors to develop and protect their ideas and to find a route to market. Early life Baylis was born on 13 May 1937 to Gladys Jane Brown, an artist, and her husband, Cecil Archibald Walter Baylis, an engineer, in Kilburn, London. He grew up in Southall, Middlesex, and attended North Primary School and Dormers Wells Secondary Modern School. His first job was in a Soil Mechanics Laboratory in Southall where a day-release arrangement enabled him to study mechanical and structural engineering at a local technical college. A keen swimmer, he swam for Great Britain at the age of 15; he narrowly failed to qualify for the 1956 Summer Olympics. In 1959, Baylis started his National Service as a physical-training instructor with the Royal Sussex Regiment and swam for the Army and Imperial Services during this time. When he left the army he took a job with Purley Pools, the company which made the first free-standing swimming pools. Initially he worked in a sales role, but later switched to research and development. His swimming skills enabled him to demonstrate the pools and drew the crowds at shows, and this led to forming his own aquatic-display company as professional swimmer, stunt performer and entertainer, performing high dives into a glass-sided tank. With money earned from performing as an underwater-escape artist in the Berlin Circus, he set up Shotline Steel Swimming Pools, a company which supplies swimming pools to schools. Inventing career Baylis's work as a stunt man exposed him to the needs of disabled people, through colleagues whose injuries had ended their performing careers. By 1985, this involvement had led him to invent and develop a range of products for the disabled called Orange Aids. In the late 1980s or early 1990s, Baylis saw a television programme about the spread of AIDS in Africa and realised that a way to halt the spread of the disease would be to educate and disseminate information