Sir Hiram Stevens Maxim (5 February 1840 – 24 November 1916) was an American-born inventor who moved from the United States to the United Kingdom at the age of 41. He remained an American citizen until he became a naturalised British subject in 1900. He was the inventor of the Maxim Gun – the first portable, fully automatic machine gun – and held patents on mechanical devices such as a mousetrap, hair-curling irons, and steam pumps. He laid 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.
In 1881, Maxim arrived in England to reorganise the London offices of the US Electric Lighting Company. By 1900, his visits back to the United States became infrequent and in that same year, Maxim became a naturalised British subject. In the following year, Queen Victoria bestowed a knighthood upon him. Queen Victoria died on 22 January 1901 and the actual knighting was done by Maxim's "friend and new king, Edward VII."
Maxim, a longtime sufferer of bronchitis, patented and manufactured a pocket menthol inhaler and a larger "Pipe of Peace", a steam inhaler using pine vapour, that he claimed could relieve asthma, tinnitus, hay fever and catarrh. After being criticised for applying his talents to quackery, he protested that "it will be seen that it is a very creditable thing to invent a killing machine, and nothing less than a disgrace to invent an apparatus to prevent human suffering".
He also invented a curling iron, an apparatus for demagnetising watches, magno-electric machines, devices to prevent the rolling of ships, eyelet and riveting machines, aircraft artillery, an aerial torpedo gun, coffee substitutes, and various oil, steam, and gas engines.
A large furniture factory had repeatedly burned down, and Maxim was consulted on how to prevent a recurrence. As a result, Maxim invented the first automatic fire sprinkler. It would douse the areas that were on fire, and it would report the fire to the fire station. Maxim was unable to sell the idea elsewhere, but when the patent expired the idea was used.
Maxim developed and installed the first electric lights in a New York City building (the Equitable Life Building (New York City) at 120 Broadway) in the late 1870s. However, he was involved in several lengthy patent disputes with Thomas Edison over his claims to the lightbulb. One of these actions regarded the incandescent bulb, for which Maxim claimed that Edison was credited by means of his better understanding of patenting law. Maxim claimed that an employee of his had falsely patented the invention under his own name, and that Edison proved the employee's claim to be false, knowing that patent law would mean the invention would become public property, allowing Edison to manufacture the lightbulb without crediting Maxim as the true inventor.
Maxim was reported to have said: "In 1882 I was in Vienna, where I met an American whom I had known in the States. He said: 'Hang your chemistry and electricity! If you want to make a pile of money, invent something that will enable these Europeans to cut each others' throats with greater facility.'"
As a child, Maxim had been knocked over by a rifle's recoil, and this inspired him to use that recoil force to automatically operate a gun. Between 1883 and 1885 Maxim patented gas, recoil and blowback methods of operation. After moving to England, he settled in a large house formerly owned by Lord Thurlow in West Norwood where he developed his design for an automatic weapon, using an action that would close the breech and compress a spring, by storing the recoil energy released by a shot to prepare the gun for its next shot. He thoughtfully ran announcements in the local press warning that he would be experimenting with the gun in his garden and that neighbours should keep their windows open to avoid the danger of broken glass.
Maxim founded an arms company with financial backing from Edward Vickers to produce his machine gun in Crayford, Kent, which later merged with Nordenfeldt. Subsequently, part of the Barrow Shipbuilding Company purchase by Vickers Corporation in 1897, formed 'Vickers, Son & Maxim'. Their improved development of the Maxim gun design, the Vickers machine gun, after Maxim's resignation from the board in 1911 on his 71st birthday, was the standard British machine gun for many years. With arms sales led by Basil Zaharoff, variants of the Maxim gun were bought and used extensively by both sides during World War I.
In his later years Maxim became profoundly deaf, as his hearing had been damaged by years of exposure to the noise of his guns.
Maxim died in London on 24 November 1916. He is buried in West Norwood Cemetery with his wife and his grandson, Lt. Colonel Maxim Joubert.