[160], Bell's own detailed account, presented to the American Association for the Advancement of Science in 1882, differs in several particulars from most of the many and varied versions now in circulation, by concluding that extraneous metal was not to blame for failure to locate the bullet. The first patent for such a device was his, but the . It will ever be a source of pride to our country that the great invention, with which his name is immortally associated, is a part of its history. The first telephone to become popular was a box-shaped device with a crank on the side and a receiver held to the ear. Alexander Graham Bell is often credited as the inventor of the telephone since he was awarded the first successful patent. The Bell Telephone Company quickly established a commercial infrastructure that could support the booming demand. 10 Facts About Alexander Graham Bell - Online - Online Safety Trainer [158][159] Its master patent was issued in December 1880, many decades before the photophone's principles came into popular use. Keeping "night owl" hours, he worried that his work would be discovered and took great pains to lock up his notebooks and laboratory equipment. On March 3, 1847, Alexander Graham Bell was born, the man who is credited in popular culture with the invention of the first working telephone. Bell's father was invited by Sarah Fuller, principal of the Boston School for Deaf Mutes (later to become the public Horace Mann School for the Deaf)[56] to introduce the Visible Speech System by providing training for Fuller's instructors, but he declined the post in favour of his son. [126][N 16], The value of the Bell patent was acknowledged throughout the world, and patent applications were made in most major countries, but when Bell delayed the German patent application, the electrical firm of Siemens & Halske set up a rival manufacturer of Bell telephones under their own patent. In 1907 Bell founded the Aerial Experiment Association, which made significant progress in aircraft design and control and contributed to the career of pioneer aviator Glenn Hammond Curtiss. PDF Who Was Alexander Graham Bell [PDF] - freewebmasterhelp.com Replica of gallows frame telephone (1937)National Museums Scotland. A replica of liquid transmitter telephone (1870's)National Museums Scotland. Bell had employed an assistant by the name of Thomas Watson to help him with the harmonic telegraph. Bell had a lasting impact on a variety of fields beyond the telephone, including optical telecommunications, hydrofoils, and aeronautics, and served as the second .
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