The story of Edison and Bell inventing the telephone.

One day, thomas watson, Bell's assistant, fiddled with the clamped reed, but Bell heard the plucking sound from the wire in the next room. He wrote down the facts, which led to further experiments. During the experiment, Bell encountered many difficulties.

However, he is an open-minded and studious person, so when asking for advice from others, he got the guidance and help from some famous scientists, including famous physicists Helmholtz, joseph henry and Edison.

March 1876, March 10, Bell shouted: "Mr. Watson, please come here! I have something to find you! "

Watson's assistant in the lab heard the call, jumped out of the lab like crazy and ran to the dormitory where Bell shouted. He shouted all the way: "I heard Bell calling me! I hear Bell calling me! " ……

In this way, human beings had the initial telephone and opened a brand-new communication history. 1877, the first news telegram sent by telephone was sent to Boston's Le Monde, marking the adoption of the telephone by the public. 1878, Bell Telephone Company was formally established.

Extended data

The development history of telephone

The telephone was invented by American A.G. Bell in 1876. He used two wires to connect two transmitters and receivers with the same structure and a diaphragm on the electromagnet, which realized the communication between the two ends for the first time. But the call distance is short and the efficiency is low. Carbon microphone appeared in 1878, which greatly improved the efficiency of telephone microphone. The receiver structure has also been improved.

The earliest telephone was a magnet telephone, which was powered by its own battery and sent a call signal with a hand-cranked generator. 1880 * * electric telephone appeared, which was powered by * * * electric switch in a centralized way, saving the hand-broadcast generator and dry battery. 189 1 year, rotary dial-up automatic telephone appeared, which can send out DC dial-up pulse, control the action of automatic exchange, select the called user and automatically complete the transfer function.

Thus pushing telephone communication to a new stage. By the end of 1960s, push-button all-electronic telephone appeared. In addition to pulse signaling, DTMF signaling also appeared. With the development of program-controlled switches, dual-tone telephone is becoming more and more popular. Electronic telephone circuits are developing towards integration, and telephone application specific integrated circuits have been widely used in various components of telephone circuits.

Various multifunctional telephones and special telephones have also emerged. By the early 1990s, there had been a telephone which integrated the functions of dialing, talking and ringing on an integrated circuit. With the development of speech recognition technology, a new type of telephone that dials directly by voice is also emerging.

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