In , Bell was awarded the French Volta Prize for his invention and with the money, founded the Volta Laboratory in Washington, where he continued experiments in communication, in medical research, and in techniques for teaching speech to the deaf, working with Helen Keller among others.
In he acquired land in Nova Scotia and established a summer home there where he continued experiments, particularly in the field of aviation. In , Bell was one of the founding members of the National Geographic Society, and served as its president from to , also helping to establish its journal.
Search term:. Read more. This page is best viewed in an up-to-date web browser with style sheets CSS enabled. Thomas A. Watson, one of Bell's assistants, was trying to reactivate a telegraph transmitter. Hearing the sound, Bell believed that he could solve the problem of sending a human voice over a wire. He figured out how to transmit a simple current first, and received a patent for that invention on March 7, Five days later, he transmitted actual speech.
Sitting in one room, he spoke into the phone to his assistant in another room, saying the now famous words: "Mr. Watson, come here. I need you. Spurred on by Henry's positive opinion, Bell and Watson continued their work.
By June , the goal of creating a device that would transmit speech electrically was about to be realized. They had proven that different tones would vary the strength of an electric current in a wire.
To achieve success, they needed only to build a working transmitter with a membrane capable of varying electronic currents and a receiver that would reproduce these variations in audible frequencies. On June 2, , while experimenting with his harmonic telegraph, Bell and Watson discovered that sound could be transmitted over a wire.
It was a completely accidental discovery. Watson was trying to loosen a reed that had been wound around a transmitter when he plucked it by accident. The "twang" Bell heard was all the inspiration that he and Watson needed to accelerate their work.
On March 7, , the U. Patent Office issued Bell Patent No. On March 10, , three days after he had been granted his patent, Bell famously succeeded in getting his telephone to work. Bell recounted the historic moment in his journal:. Watson, come here—I want to see you.
Watson had just received the first telephone call. Always the shrewd businessman, Bell took every opportunity to show the public what his telephone could do. On January 25, , Bell successfully made the first transcontinental telephone call. Watson, come here. I want you. In this vein, Bell was an advocate of forced sterilization and was closely connected with the eugenics movement in the United States.
In , he presented data to the National Academy of Sciences indicating that congenitally deaf parents were more likely to produce deaf children and tentatively suggested that deaf people should not be allowed to marry each other. He also conducted sheep-breeding experiments at his estate to see if he could increase the numbers of twin and triplet births.
In , he hastily constructed a metal detector as a way to try and locate a bullet lodged in President James Garfield after an assassination attempt. He would later improve this and produce a device called a telephone probe, which would make a telephone receiver click when it touched metal. And when Bell's newborn son, Edward, died from respiratory problems, he responded by designing a metal vacuum jacket that would facilitate breathing.
In his 84 years, Thomas Edison acquired a record number of 1, patents singly or jointly and was the driving force behind such innovations as the phonograph, the incandescent light bulb and one of the earliest motion picture cameras. By turns charismatic and ruthless, brilliant and power hungry, diplomatic and Serbian-American engineer and physicist Nikola Tesla made dozens of breakthroughs in the production, transmission and application of electric power.
He invented the first alternating current AC motor and developed AC generation and transmission technology. In , Connecticut-born gun manufacturer Samuel Colt received a U.
Colt founded a company to manufacture his revolving-cylinder pistol; however, sales were slow and the The internet got its start in the United States more than 50 years ago as a government weapon in the Cold War. For years, scientists and Developed in the s and s by Samuel Morse and other inventors, the telegraph revolutionized long-distance communication. It worked by transmitting electrical signals over a wire laid between stations. In addition to helping invent the telegraph, Samuel Morse Live TV.
This Day In History. History Vault. Telephone In , Bell started working on the harmonic telegraph — a device that allowed multiple messages to be transmitted over a wire at the same time. Recommended for you. How the Troubles Began in Northern Ireland.
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