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of New York
1902 Established the company with backing from George Westinghouse
Eventually the incandescent lamp displaced the arc lamp for many duties but encouraging results with higher pressure discharges in Europe later re-kindled interest in the USA in mercury lamps for general lighting.
By 1919 the General Electric Co felt sufficiently confident in the future of mercury technology that it bought out the Cooper-Hewitt company. Production was moved from the original factory at 220 West 29th St in Manhattan to GE's new "Vapor Lamp Department" at the Grand St, Hoboken, New Jersey.
1921 Death of Peter Hewitt (1861-1921), inventor of the mercury vapour lamp, mercury acr rectifier and other devices.
As new lamp types were developed in Europe they were quickly adopted by GE.
1934 an improved Cooper-Hewitt lamp was developed which continued in production until 1965. In the rest of the world the European-style higher pressure lamps were adopted immediately.