Receba as notícias:

Inventor do «telefone eléctrico falante» morreu há 84 anos

Alexander Graham Bell iniciou a revolução nas telecomunicações

2006-08-02
Por Por Patrícia Gonçalves
"Sr. Watson, venha aqui. Preciso da sua ajuda". A 10 de Março de 1876 foram, acidentalmente, estas as primeiras palavras trocadas através de um telefone. O autor delas? Alexander Graham Bell, o inventor que baseou a sua descoberta no conceito de que uma corrente eléctrica pode ser feita para modificar a intensidade, precisamente enquanto a densidade do ar varia durante a produção do som. Oitenta e quatro anos após a sua morte, o invento continua a ser uma das principais formas de comunicação, ainda que a tecnologia tenha evoluído para os equipamentos (tele)móveis.
Nasceu em Edinburgo, na Escócia, em 1847, e desde tenra idade que se começou a interessar na reprodução de sons vocais, muito por influência do pai, Alexander Melville Bell, especialista na correcção da fala e do ensino de deficientes auditivos.

Foi depois de ter imigrado para a cidade de Boston, nos Estados Unidos, que se envolveu em diversas experiências, tendo em 1874 inventado um telégrafo harmónico que  permitia transmitir diversas mensagens, por um único fio. Da pesquisa realizada, e na tentativa de reproduzir a voz humana electricamente, Alexander Graham Bell tornou-se, então, um especialista na transmissão eléctrica por ondas e a 14 de Fevereiro de 1876, foi solicitada a patente do então denominado «telefone eléctrico falante». Menos de um mês depois surgiram, ainda que acidentalmente, as primeiras palavras ditas através do invento. A 10 de Março, e dirigindo-se para o seu parceiro Thomas Watson, que produziu e montou o equipamento, Bell pedia pelo telefone: “Sr. Watson, venha aqui. Preciso de sua ajuda”.

A descoberta revolucionou toda uma era e marcou, indubitavelmente, um marco nas telecomunicações. A continuidade das investigações foram limando os problemas que se iam encontrando e as demonstrações consecutivas da sua utilização deitaram por terra os mais cépticos. A 9 de Outubro de 1976, o som das vozes de Bell e Watson percorreram os fios de telefone, entre as cidades de Boston e Cambridge. A partir desse momento, as telecomunicações nunca mais foram as mesmas e um ano depois, enquanto estava de lua-de-mel, Bell introduziu o telefone na Europa, em Inglaterra e na França.

A expansão resultou na fundação da sua própria empresa, a Companhia Americana de Telefone e Telégrafo que se tornou num verdadeiro sucesso económico e numa das maiores e melhores companhias mundiais que continua a existir nos dias de hoje.

Alexander Graham Bell (3 de Março, 1847 – 2 de Agosto, 1922), é historicamente, considerado o inventor do telefone, apesar de existirem indícios de que apontam como António Meucci como o legítimo inventor.

eros trevisan
2008-03-03
15:03
ANTONIO MEUCCI An invention none of us could live without, a tool of modern communications so basic that many of today's business and social activities would be inconceivable in its absence, the telephone, is at the center of a series of events so strange as to amount to a "whodunit." Most of us were brought up on the story of Alexander Graham Bell, the romantic figure of an inventor with dash and charm. Some of these favorable impressions must have come from the famous, if apocryphal, "Come here Watson, I want you" legend of the invention of the device, a tradition augmented by the movie version of the tale, in which actor Don Amiche became more or less permanently attached to the persona of Bell. But it seems that history must be rewritten if justice is to be done to an immigrant from Florence, Italy: Antonio Meucci, who invented the telephone in 1849 and filed his first patent caveat (notice of intention to take out a patent) in 1871, setting into motion a series of mysterious events and injustices which would be incredible were they not so well documented. Meucci was an enigmatic character, a man unable to overcome his own lack of managerial and entrepreneurial talent, a man tormented by his inability to communicate in any language other than Italian. The tragic events of his personal and professional life, his accomplishments and his association with the great Italian patriot, Garibaldi, should be legendary in themselves but, curiously, the man and his story are practically unknown today. Antonio Meucci was born in San Frediano, near Florence, in April 1808. He studied design and mechanical engineering at Florence's Academy of Fine Arts and then worked in the Teatro della Pergola and various other theaters as a stage technician until 1835, when he accepted a job as scenic designer and stage technician at the Teatro Tacon in Havana, Cuba. Absolutely fascinated by scientific research of any kind, Meucci read every scientific tract he could get his hands on, and spent all his spare time in Havana on research, inventing a new method of galvanizing metals which he applied to military equipment for the Cuban government; at the same time, he continued his work in the theater and pursued his endless experiments. One these touched off a series of fateful events. Meucci had developed a method of using electric shocks to treat illness which had become quite popular in Havana. One day, while preparing to administer a treatment to a friend, Meucci heard an exclamation of the friend, who was in the next room, over the piece of copper wire running between them. The inventor realized immediately that he held in his hand something much more important than any other discovery he had ever made, and he spent the next ten years bringing the principle to a practical stage. The following ten years were to be spent perfecting the original device and trying to promote its commercialization. With this goal, he left Cuba for New York in 1850, settling in the Clifton section of Staten Island, a few miles from New York City. Here, in addition to his problems of a strictly financial nature, Meucci realized that he could not communicate adequately in English, having relied on the similarities of Italian and Spanish during his Cuban residence. Furthermore, in Staten Island, he found himself surrounded by Italian political refugees; Giuseppe Garibaldi, when exiled from Italy, spent his period of United States residency in Meucci's house. The scientist tried to help his Italian friends by devising any number of industrial projects using new or improved manufacturing methods for such diverse products as beer, candles, pianos and paper. But he knew nothing of management, and even those initiatives which succeeded were to have their profits eaten up by unscrupulous or inept managers or by the refugees themselves, who spent more time in political discussion than they did in active work. Meanwhile, Meucci continued to dedicate his time to perfecting the telephone. In 1855, when his wife became partially paralyzed, Meucci set up a telephone system which joined several rooms of his house with his workshop in another building nearby, the first such installation anywhere. In 1860, when the instrument had become practical, Meucci organized a demonstration to attract financial backing in which a singer's voice was clearly heard by spectators a considerable distance away. A description of the apparatus was soon published in one of New York's Italian newspapers and the report together with a model of the invention were taken to Italy by a certain Signor Bendelari with the goal of arranging production there; nothing came of this trip, nor of the many promises of financial support which had been forthcoming after the demonstration. The years which followed brought increasing poverty to an embittered and discouraged Meucci, who nonetheless continued to produce a series of new inventions. His precarious financial situation, however, often constrained him to sell the rights to his inventions, and still left him without the wherewithal to take out final patents on the telephone. A dramatic event, in which Meucci was severely burned in the explosion of the steamship Westfield returning from New York, brought things to an even more tragic state. While Meucci lay in hospital, miraculously alive after the disaster, his wife sold many of his working models (including the telephone prototype) and other materials to a secondhand dealer for six dollars. When Meucci sought to buy these precious objects back, he was told that they had been resold to an "unknown young man" whose identity remains a mystery to this day. Crushed, but not beaten, Meucci worked night and day to reconstruct his invention and to produce new designs and specifications, clearly apprehensive that someone could steal the device before he could have it patented. Unable to raise the sum for a definitive patent ($250, considerable in those days), he took recourse in the caveat or notice of intent, which was registered on December 28, 1871 and renewed in 1872 and 1873 but, fatefully, not thereafter. Immediately after he received certification of the caveat, Meucci tried again to demonstrate the enormous potential of the device, delivering a model and technical details to the vice president of one of the affiliates of the newly established Western Union Telegraph Company, asking permission to demonstrate his "Talking Telegraph" on the wires of the Western Union system. However, each time that Meucci contacted this vice president, a certain Edward B. Grant, he was told that there had been no time to arrange the test. Two years passed, after which Meucci demanded the return of his materials, only to be told that they had been "lost." It was then 1874. In 1876, Alexander Graham Bell filed a patent which does not really describe the telephone but refers to it as such. When Meucci learned of this, he instructed his lawyer to protest to the U.S. Patent Office in Washington, something that was never done. However, a friend did contact Washington, only to learn that all the documents relevant to the "Talking Telegraph" filed in Meucci's caveat had been "lost." Later investigation produced evidence of illegal relationships linking certain employees of the Patent Office and officials of Bell's company. And later, in the course of litigation between Bell and Western Union, it was revealed that Bell had agreed to pay Western Union 20 percent of profits from commercialization of his "invention" for a period of 17 years. Millions of dollars were involved, but the price may been cheaper than revealing facts better left hidden, from Bell's point of view. In the court case of 1886, although Bell's lawyers tried to turn aside Meucci's suit against their client, he was able to explain every detail of his invention so clearly as to leave little doubt of his veracity, although he did not win the case against the superior - and vastly richer - forces fielded by Bell. Despite a public statement by the then Secretary of State that "there exists sufficient proof to give priority to Meucci in the invention of the telephone," and despite the fact that the United States initiated prosecution for fraud against Bell's patent, the trial was postponed from year to year until, at the death of Meucci in 1896, the case was dropped. The story of Antonio Meucci is still little known, yet it is one of the most extraordinary episodes in American history, albeit an episode in which justice was perverted. Still, the genius and perseverance of an Italian immigrant - genius, poor businessman, tenacious defender of his rights against incredible odds and grinding poverty - is a story which must be told. Antonio Meucci is waiting to be recognized as the inventor of a key element in our modern culture
mariana
2010-07-11
21:28
bom eu ache muito intereçante saber um pouco da nossa tecnologia
José Cassenje Inácio
2012-02-04
11:18
De facto estou congratulado com a ciência de hoje trouxe - me mais enrequimento do telefone.

Adicionar comentário:

Comentário
Nome:
Email:
Insira as letras na caixa
Ciência Hoje não publica comentários anónimos. Ciência Hoje só publica comentários identificados com nome e email para eventual posterior contacto. Ciência Hoje recusa publicar comentários insultuosos ou ataques pessoais.

Últimas notícias

Nova lei da investigação clínica
publicada hoje em Diário da República

Dor condiciona actividades diárias dos doentes mais idosos

Fraunhofer Portugal Challenge premeia a ciência nacional

Investigadores da UC localizam a distribuição celular
da proteína envolvida na Alzheimer

Cocktails de pesticidas prejudicam a saúde dos solos

Polémica das Ciências do Mar:
resposta ao coordenador do painel de avaliação

Cancro de Mama “Triplo-negativo” e Metástases do Cérebro
«vencem» bolsas de investigação da Associação Laço

Galaxy Zoo abre as portas do Universo

“Será realista o mundo de Avatar ?”

São João da Madeira vence “Dá Power ao Electrão”

“Jogar” na Sala de aula: estudo da UC defende
a utilização de dispositivos móveis no ensino

Fobias: quem tem medo compra um cão!

Bolsas para Ciências do Mar: críticas vindas a público
são totalmente desprovidas de fundamento

Estudo sociológico sobre jovens portugueses/as
vence prémio mundial

Alunos do secundário desvendam a física das partículas na UMinho

Sabe escolher azeite de qualidade?
Se vai só pela acidez está errado!

Projecto internacional da UA mostra vantagens
da iluminação pública inteligente com LED

Candidatos denunciam irregularidades
na atribuição de bolsas da FCT

Cientista português ligado
a nova investigação sobre Alzheimer

Cancro e diabetes: políticas a longo prazo
reduzem incidência de casos

Quinta do Seixo é caso de estudo
para especialistas europeus em biodiversidade

Trinta concorrentes disputam meia-final do FameLab

Veneno de caracol marinho letal pode facultar
novos tratamentos para a dor crónica em humanos

Cientistas portugueses no maior projecto da UE
contra a degradação dos solos europeus

Inaugurada estação de seguimento do Galileo
em Santa Maria, Açores

Pressão para que as mulheres se casem
ainda é grande no século XXI

O doce sabor amargo de um trabalho
de Química Alimentar da UP

A menina dança? E na sua cabeça o que se passa?

Rastreio do cancro do cólon e recto: porque fazer e como fazer

Perspetivando os próximos invernos – interrogações
como que na ponte de um superpetroleiro