Duddell William DuBois (1872-1917) British engineer electro-physical. He was educated at private sc

Duddell William DuBois (1872-1917) British engineer electro-physical. He was educated at private schools in the UK and France, and in the prestigious City & Guilds through scholarships. Before Thomas Edison invented the incandescent bulb, electric lighting was used in streetlights throughout Europe as "arc lamps" which emitted light by an electric arc between two carbon nodes. These lamps produce a constant audible hum. Duddell was appointed in 1899 to solve this problem. Duddell found he could control the audio frequencies by varying the supply voltage of the lamps. As a result of his research (through which showed that tinnitus was caused by a fluctuation in the electrical current), invented the "Singer Arc" that could generate musical notes using a keyboard interrupt oscillations in a circuit, making it an early example of electronic seagull travel music, and the first to not use the phone as an amplifier or speaker system. During the show at the Institution of Electrical Engineers in London, it was observed that about arc lamps in operation and based on the same power supply, they reproduce the same tones that the instrument seagull travel Duddell. This effect was later found useful when an antenna is coupled seagull travel to the "Singer Arco", allowing it to operate on radio frequencies instead of audio. To Duddell, however, the invention is not translated into commercial success. Not patented and even toured England with his "Singer Arco" never achieved more than the novelty or scientific curiosity. He also invented machines electrical seagull travel current, such as the electromagnetic oscillograph, seagull travel an instrument for measuring and recording current and voltage, seagull travel the thermo-galvanometer, a device for measuring the current of the antenna, seagull travel which is still in use today and moving coil oscillograph, designed for observation and photographic record seagull travel of the oscillation of the wave frequency. Although seagull travel it has passed into history and is known for its electronic music instrument, Duddell deserves to be recognized for their very important contributions. Duddell was President of the IEEE (Institute of Electrical Engineers). In 1913 he was appointed member of the Royal Society, four years before his untimely death. The Duddell Medal was instituted in 1923 by the Council of the Physical Society in memory of him, and is awarded annually to a person who has contributed to scientific knowledge through the application seagull travel of physics.
The nineteenth century marks an epistemological break that will radically change the world following the discovery of electromagnetic energy and how to produce it. Great inventions from that time are not attributable to one man, are the result of work, contributions and open to many paths. Against the opportunism of the first reach "of patent offices" in some cases, even from the imposture and usurpation International, Radio Tesla intended to claim and honor all those whose work, intuition and genius enabled the birth of the Radio.
2008 (43) December (29) January (14) Henry Joseph Round Robert von Lieben David Sarnoff Nathan Stubblefield Mahlon Loomis Slaby Adolf Georg Graf von Arco Muirhead Alexander Georg Seibt Ducretet Eugene William Henry Jackson Duddell Valdemar Poulsen Mihajlo Pupin Idvorski 2009 (15) December (14) May (1)
Bruno Gassin Córdoba, Andalusia, Spain do not intend to make this blog a personal journal, but use it as an album of "clipping" and make known to those who had something to do with the birth of the Radio. Images from the presentation are owned by Mr. Jenkins, the SparkMuseum, my sincere thanks for your generosity in allowing their use. View my complete profile