Teletypewriter facts for kids
A teletypewriter (TTY; also called a teletype or teleprinter) is a device that sends a typed message to another place. A teletypewriter has a typewriter keyboard, a local printer (so the user can see what has been typed) and a transmitter. Messages can be sent over wires or radio waves. Teletypes were used mostly in the early to mid-20th century. They were developed to improve telegraphs, some of which also used keyboards, though not typewriter keyboards.
Though teleprinters have been replaced by other technologies, TDDs (Telecommunications Devices for the Deaf), which are based on the idea and design of teletypes, are still used these days. Not all people who are deaf, hard of hearing, or speech-impaired have switched to using instant messaging or texting or other modern services. Many still type messages back and forth to one another by TDD.
Related pages
Images for kids
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Hughes telegraph, an early (1855) teleprinter built by Siemens and Halske. The centrifugal governor to achieve synchronicity with the other end can be seen.
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Siemens t37h (1933) without cover
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International Telegraph Alphabet 2 development of the Baudot–Murray code
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A British Creed & Company Teleprinter No. 7 in 1930
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Olivetti Teleprinter
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Siemens Fernschreiber 100 teleprinter
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A Teletype Model 33 ASR teleprinter, with punched tape reader and punch, usable as a computer terminal
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A Teletype Model 32 ASR used for Telex service
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A Teletype Model 33 ASR with paper tape reader and punch, as used for early modem-based computing
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Keyboard of a Baudot teleprinter, with 32 keys, including the space bar
See also
In Spanish: Teletipo para niños
