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An old rotary dial telephone. AT&T push button telephone made by Western Electric, model 2500 DMG black, 1980. A telephone 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. A telephone converts sound, typically and most efficiently the human voice ...
Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876. Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois. Tivadar Puskás proposed the telephone switchboard exchange in 1876. Thomas Edison invented the carbon microphone which produced a strong telephone ...
Telephone switchboard. A telephone switchboard was a device used to connect circuits of telephones to establish telephone calls between users or other switchboards, throughout the 20th century. The switchboard was an essential component of a manual telephone exchange, and was operated by switchboard operators who used electrical cords or ...
Plain old telephone service. Plain Old Telephone Service ( POTS ), or Plain Ordinary Telephone System, [1] is a retronym for voice-grade telephone service employing analog signal transmission over copper loops. Originally POTS stood for Post Office Telephone Service as early phone lines in most parts of the world were operated directly by the ...
Private conversation, 1910. Historian John Brooks argues that the telephone created "a new habit of mind--a habit of tenseness and alertness, of demanding and expecting immediate results, whether in business, love or other forms of social intercourse." [70] The telephone was instrumental to modernization.
It was like a patent application, but without a request for examination, for the purpose of notifying the patent office of a possible invention in process). 14 February 1876, about 11:30 am: Bell's lawyer brings to the same patent office Bell's patent application for the telephone. Bell's lawyer requests that it be registered immediately in the ...
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