Peter Cooper Hewitt (1861-1921), US ingegnere elettrico. Hewitt ha inventato un a vapori di mercurio lampada (brevettato) 1901 e costruito il primo arco di mercurio rectifi

• Collaboratore: Science Photo Library / Alamy Foto Stock
• ID dell’immagine: 2ACR2ED
• Dimensioni dei file: 25 MB (636,2 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 2575 x 3388 px | 21,8 x 28,7 cm | 8,6 x 11,3 inches | 300dpi
• Data acquisizione: 15 agosto 2013
• Fotografo: MIRIAM AND IRA D. WALLACH DIVISION OF ART, PRINTS AND PHOTOGRAPHS/NEW YORK PUBLIC LIBRARY/SCIENCE PHOTO LIBRARY

Altre informazioni

Peter Cooper Hewitt (1861-1921), US electrical engineer. Hewitt invented a mercury-vapour lamp (patented 1901) and built the first mercury arc rectifier (1902). Early models of the lamp were a thin tube with a pool of mercury filling the lamp with mercury vapour. Current flowing between electrodes and through the mercury vapour discharged a bluish-green light. The mercury arc rectifier, used to convert alternating current to direct current, was used in industry and on the railways. This signed 1918 photograph is from a collection of unpublished images obtained for 'The Pageant of America: A Pictorial History of the United States' (1925-1929).

Parole chiave associate all'immagine

• 21 â secolo
• astronomico
• astronomy
• colour
• composita
• crater
• esplorazione
• inner
• länder
• machine
• marito collina
• marte
• marziano
• mccool
• novembre 2005
• orizzonte
• paesaggio
• panorama
• planète
• ramon
• rover
• scienza planetaria
• seminole
• spirit
• superficie
• vasca
• vera
• vetta