Hewitt, Peter Cooper

Hewitt, Peter Cooper

▪ American electrical engineer
born May 5, 1861, New York, N.Y., U.S.
died Aug. 25, 1921, Paris, France

      American electrical engineer who invented the mercury-vapour lamp (mercury lamp), a great advance in electrical lighting.

      At an early age, Hewitt began research on electricity and mechanics in a greenhouse converted into a workshop. In 1901 he marketed his first mercury-vapour lamp (electric discharge lamp), but an improved model, brought out in 1903, had better colour qualities and found widespread use for industrial lighting. He later developed the quartz-tube mercury lamp, which found extensive use in biological research.

      Other inventions by Hewitt include the mercury rectifier (a device for converting alternating current into direct current) and a radio receiver. He discovered the fundamental principle of the vacuum-tube amplifier during study of the flow of electricity through rarefied gases. His interest in aeronautics culminated in the construction (1918) of an early helicopter.

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Universalium. 2010.

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  • Peter Cooper Hewitt — (* 5. Mai 1861; † 25. August 1921) war ein US amerikanischer Elektroingenieur. Er erfand 1901 die Quecksilberdampflampe, die blaugrünes Licht ausstrahlt. Diese Lampe wurde aufgrund ihrer hohen Effizienz in der Fotografie genutzt. Die Lichtfarbe… …   Deutsch Wikipedia

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