Sir Hiram Stevens Maxim (February 5, 1840 – November 24, 1916) was an American-born inventor who emigrated to the United Kingdom at the age of forty-one, although he remained an American citizen until he became a naturalized British subject in 1900. He was the inventor of the Maxim Gun – the first portable, fully automatic machine gun – and an elaborate mousetrap. He laid a claim to inventing the lightbulb and even experimented with powered flight, but his large aircraft designs were never successful. However, his "Captive Flying Machine" amusement ride, designed as a means by which to fund his research while generating public interest in flight, was highly successful.