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The quadruplex was Edison's most important telegraph invention. It enabled Western Union to save money by greatly increasing the number of messages the company could send without building new lines.
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edison.rutgers.edu/quad.htm
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nections from one quadruplex telegraph to another, whereby the circuits work into and operate each other, so that the messages are ...
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edison.rutgers.edu/patents/00209241.PDF
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Thomas Edison’s quadruplex telegraph of 1874 is the most famous of a series of inventions of the late 19th century intended to increase the efficiency and profits of telegraph companies.
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www.ieeeghn.org/wiki/index.php/Quadruplex_Telegraph
www.ieeeghn.org/wiki/index.php/Quadruplex_Telegraph
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Home > Categories > Quadruplex Telegraph ... IEEE.org • IEEE Xplore Digital Library • IEEE Standards Association • Spectrum Online • More IEEE Sites ... Computers and Information Processing...
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www.ieeeghn.org/wiki/index.php?title=Quadruplex%20Teleg...
www.ieeeghn.org/wiki/index.php?title=Quadruplex%20Telegraph&myaction=attachments
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after having played tt for 40 mins, i was tired as usual. sweating profusely, we went for lunch as always. we usually manage to we found one occupied by just two people and so we ( 2 of us ) moved there. ... i came to know later that he had told my friend that "he had switched off the fan" to which my friend had replied "ok".
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quadruplextelegraph.blogspot.com/
quadruplextelegraph.blogspot.com/
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Quadruplex telegraph. Dictionary terms for Quadruplex telegraph in English, English definition for Quadruplex telegraph, Thesaurus and Translations of Quadruplex telegraph to English. ... Define Quadruplex telegraph...
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www.babylon.com/definition/Quadruplex_telegraph/English
www.babylon.com/definition/Quadruplex_telegraph/English
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The Menlo Park research lab was made possible by the sale of the quadruplex telegraph that Edison invented in 1874, which could send four simultaneous telegraph signals over the same wire. When Edison asked Western Union to make an offer, he was shocked at the unexpectedly large amount that Western Union offered;
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www.inventions-license.com/view_inventor.php?id=21
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He formed the American Telegraph Works to work on developing an automatic telegraph later in the year. In 1874 he began to work on a multiplex telegraphic system for Western Union, ultimately developing a quadruplex telegraph, which could send two messages simultaneously in both directions.
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memory.loc.gov/ammem/edhtml/edbio.html
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Most people who are great at improv, like Asssscat, learned this stuff first- or second-hand from a man named Del Close, who is to improv comedy what George Washington is to America or Thomas Edison is to, oh, you know, quadruplex-telegraph repeaters.
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www.viceland.com/int/v14n12/htdocs/asscats_temporary_st...
www.viceland.com/int/v14n12/htdocs/asscats_temporary_stories.php?country=us
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