Alexander Grahambell

Alexander Graham Bell
Alexander Graham Bell (March 3, 1847 – August 2, 1922) was an eminent scientist, inventor, engineer and innovator who is credited with inventing the first practical telephone.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.[1] His researchon hearing and speech further led him to experiment with hearing devices which eventually culminated in Bell being awarded the first US patent for the telephone in 1876.[N 1] In retrospect, Bellconsidered his most famous invention an intrusion on his real work as a scientist and refused to have a telephone in his study.[3]
Many other inventions marked Bell's later life, including groundbreakingwork in optical telecommunications, hydrofoils and aeronautics. In 1888, Alexander Graham Bell became one of the founding members of the National Geographic Society.[4] Bell has been described as oneof the most influential figures in human history
Telephone
The modern telephone is the culmination of work done by many individuals and the history of the invention of the telephone is a veryconfusing collection of claims and counterclaims, made no less confusing by the many lawsuits which attempted to resolve the patent claims of several individuals. This article covers the early years1844-1898, from conception of the idea of an electric voice-transmission device, failed attempts to use "make-and-break" current, successful experiments with electromagnetic devices by Alexander Bell andThomas Watson, to commercially successful telephones in the late 19th century. This is a summary of the attempts, success and failures of individual inventors during that half century.
The story beginswith a non-electrical string telephone or "lover's telephone" that has been known for centuries, comprising two diaphragms connected by a taut string or wire. Sound waves are carried as mechanical...