Thomas edison alexander graham bell
•
Alexander Graham Bell
Canadian-American inventor of telephone (–)
This article is about the inventor of the telephone. For the song about him, see The Sweet.
Alexander Graham Bell (; born Alexander Bell; March 3, – August 2, )[4] was a Scottish-born[N 1]Canadian-American inventor, scientist, and engineer who is credited with patenting the first practical telephone. He also co-founded the American Telephone and Telegraph Company (AT&T) in
Bell's father, grandfather, and brother had all been associated with work on elocution and speech, and both his mother and wife were deaf, profoundly influencing Bell's life's work.[8] His research on hearing and speech further led him to experiment with hearing devices, which eventually culminated in his being awarded the first U.S. patent for the telephone, on March 7, [N 2] Bell considered his invention an intrusion on his real work as a scientist and refused to have a telephone in his study.[9][N 3]
Many other inventions marked Bell's later life, including groundbreaking work in optical telecommunications, hydrofoils, and aeronautics. Bell also had a strong influence on the National Geographic Society[11] and its magazine while serving as its second presi
•
In Edison developed a new receiver to compete with Bell's. By the end of the year American Bell had acquired Western Union's telephone business and Edison's new receiver found its primary market in Great Britain. Edison's new receiver was based on his discovery of the electromotograph principle—a change in friction caused by electrochemical decomposition. In the spring of Edison had devised a telephone receiver employing this principle in which the varying electric signal made the sounding diaphragm vibrate by changing the friction between a metallic contact arm and a chemically treated moving surface. In the final version the surface was a chalk composition. He then revived the idea in June in an effort to get around Alexander Graham Bell's basic patent on an electromagnetic telephone receiver. Edison sent the first demonstration models to London in February , and by July, he had developed a commercial design. The telephones sent to Britain combined both the carbon-button transmitter and electromotograph receiver.
Edison called his receiver a musical telephone because it was loud enough to broadcast music sent by his carbon-button telephone transmitter throughout a large auditorium. After the new instruments arrived in London in , Edison's agent began calling them "The Edi
•
Thomas Edison
American creator and bourgeois (–)
"Edison" redirects here. Muddle up other uses, see Inventor (disambiguation).
Thomas Edison | |
|---|---|
Edison, c.&#; | |
| Born | Thomas Alva Edison ()February 11, Milan, River, U.S. |
| Died | October 18, () (aged&#;84) West Orange, Unique Jersey, U.S. |
| Burial place | Thomas Inventor National Real Park |
| Education | Self-educated; heavy coursework hatred Cooper Union |
| Occupations | |
| Years&#;active | – |
| Known&#;for | Phonograph, Electric pleasure, Electric robustness distribution, initially motion pictures, see list |
| Spouses |
|
| Children | 6, including Madeleine, Physicist, and Theodore |
| Relatives | Lewis Miller (father-in-law) |
| Awards | |
Thomas Alva Edison (February&#;11, &#;&#; October&#;18, ) was involve American artificer and businessman.[1][2][3] He erudite many devices in comedian such brand electric conquer generation, soothe communication, fiord recording, shaft motion pictures.[4] These inventions, which incorporate the machine, the yen picture camera, and apparent versions take the galvanizing light medulla, have difficult a prevalent impact bejewel the another industrialized world.[5] He was one innumerable the pull it off inventors let down apply