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Lee De Forest foi um físico e inventor estadunidense.

Forest foi um físico que pesquisou componentes e aparelhos dedicados para a gravação e reprodução de sons, assim como instrumentos de aplicação nos campos da eletromedicina e da telefonia.

Desenvolveu centelhadores com circuitos sintonizados que seriam futuramente utilizados em bisturis eletrônicos, embora este feito não lhe seja atribuído oficialmente.

Sua vida acadêmica no campo da física iniciou em 1893 quando entrou na Universidade de Yale, doutorando-se em física em 1899.

Trabalhou em pesquisas sobre eletricidade e propagação de ondas eletromagnéticas. Compôs uma tese sobre reflexão de ondas hertzianas. Este trabalho teórico, é considerado um dos primeiros reconhecidos que tratam sistematicamente sobre o fenômeno da radiotransmissão e radiorecepção.

Em 1907 De Forest patenteou a válvula tríodo e desenvolveu um detector eletrolítico para ondas de rádio. No mesmo ano transmitiu programas musicais experimentalmente para a cidade de Nova York, sendo uma das primeiras transmissões comerciais conhecidas, e reconhecidamente com audiência, embora acadêmica.

Em 1908 transmitiu sinais radiofônicos do alto da torre Eiffel, em Paris; esta transmissão experimental foi captada pelos postos militares da região, comprovando desta forma a possibilidade do rádio para fins bélicos.





== Referências == Wikipedia  

✵ 26. Agosto 1873 – 30. Junho 1961
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Lee De Forest: 7   citações 0   Curtidas

Lee De Forest: Frases em inglês

“The children of the white families in town were not permitted to associate with me, because my father was committing the then unpardonable crime, in Southern eyes, of educating negroes.”

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Lee De Forest

Interviewed by Frank Parker Stockbridge, "The Man Who Made Radio Talk" http://books.google.com/books?id=bCoDAAAAMBAJ&pg=PA32, Popular Science Monthly, May 1929

“The actual poetry of this engineering triumph was first brought stunningly upon me in 1915 when I sat in an audience in San Francisco and heard the breaking of the surf upon the far Atlantic shore.”

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Lee De Forest

"Dawn of the Electronic Age" http://blog.modernmechanix.com/2006/03/20/dawn-of-the-electronic-age/, Popular Mechanics, January 1952

“I foresee great refinements in the field of short-pulse microwave signaling, whereby several simultaneous programs may occupy the same channel, in sequence, with incredibly swift electronic communication; vastly important developments in microwave technique, whereby present clumsy connecting leads between wall or floor sockets and electric devices like toasters and vacuum sweepers may become unnecessary; gigantic magnetrons and klystrons, or their successors, will generate megawatts in microwaves; living rooms and their occupants will be heated by high-frequency waves from walls or ceilings; short waves will be generally used in the kitchen for roasting and baking, almost instantaneously”

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Lee De Forest

"Dawn of the Electronic Age" http://blog.modernmechanix.com/2006/03/20/dawn-of-the-electronic-age/, Popular Mechanics, January 1952

“Unwittingly then had I discovered an Invisible Empire of the Air, intangible, yet solid as granite, whose structure shall persist while man inhabits the planet.”

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Lee De Forest

Father of Radio: The Autobiography of Lee De Forest (1950), p. 4

“So I repeat that while theoretically and technically television may be feasible, yet commercially and financially, I consider it an impossibility; a development of which we need not waste little time in dreaming.”

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Lee De Forest

1926, as quoted in [Gawlinski, Mark, Interactive television production, 2003, Focal Press, 0-240-51679-6, 89]

“To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth—all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances.”

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Lee De Forest

De Forest Says Space Travel Is Impossible https://news.google.com/newspapers?id=KXhfAAAAIBAJ&sjid=my8MAAAAIBAJ&pg=3288,6595098&dq=all-that-constitutes-a-wild-dream-worthy-of-jules-verne&hl=en, Lewiston Morning Tribune via Associated Press, February 25, 1957

“The microphone-amplifier-loudspeaker combination is having an enormous effect on our civilization. Not all of it is good! Consider to what heights of impudence and tyranny, and to what depths of moral depravity, has radio broadcasting and the loudspeaker attained in that recent monstrosity, Transit Radio, Inc. Almost incredible is the loathsome fact that already in 21 cities bus riders must listen to never-ending, blatant advertising and unwelcome jitterbug and bop music.”

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Lee De Forest

"Dawn of the Electronic Age" http://blog.modernmechanix.com/2006/03/20/dawn-of-the-electronic-age/, Popular Mechanics, January 1952