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Telephone, an instrument designed for the simultaneous transmission and reception of the human voice. It has become the most widely used telecommunications device in the world, and billions of telephones are in use. This article describes the modern telephone’s components and traces its historical development.
Telephone. An old rotary dial telephone. AT&T push button telephone made by Western Electric, model 2500 DMG black, 1980. A telephone, colloquially referred to as a phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly.
The master telephone patent granted to Bell, 174465, March 10, 1876. The modern telephone is the result of the work of many people. Alexander Graham Bell was, however, the first to patent the telephone, as an "apparatus for transmitting vocal or other sounds telegraphically".
In the 1870s two American inventors, Elisha Gray and Alexander Graham Bell, each independently, designed devices that could transmit speech electrically. Gray’s first device made use of a harmonic telegraph, the transmitter and receiver of which consisted of a set of metallic reeds tuned to different frequencies.
May 21, 2021 · Two men invented the telephone, but Alexander Graham Bell is the one most people today remember. Learn all about Bell and the history of the telephone.
Nov 9, 2009 · Alexander Graham Bell is known for his many inventions, especially the telephone and a metal detector. He later created the Bell Telephone Company, now AT&T.
telephone, Instrument designed for simultaneous transmission and reception of the human voice. It works by converting the sound waves of the human voice to pulses of electric current, transmitting the current, and then retranslating the current back to sound.
Jul 18, 2023 · If you want to talk to someone, all you have to do is pick up the phone and dial a few digits. You are instantly connected to that person, and you can have a two-way conversation through a telephone call. A telephone line is at the heart of the telephone system.
Within a year, thousands of people in America owned telephones. Other remarkable inventions related to the telephone are the rotatory dial, invented in 1892; the cordless phone, invented in 1965; and the mobile phone, invented in 1983. Here is the detailed chronology of the telephone.
Jul 29, 2023 · One pair is an output: it takes outgoing electrical signals from the microphone to the telephone system; the other pair is an input: it takes incoming signals from the telephone system to the loudspeaker.
