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From the electric light and the telegraph to the fuel cell and the universal stock printer, Thomas Edison made magic from his lab in Menlo Park, New Jersey (now named after the inventor).
In an ongoing project, Rutgers University has digitized dozens of Edison's original diaries, which include many original sketches and descriptions of devices that we use today.
Here's a glimpse at some of the early drawings and their practical applications now.
Automatic Telegraph Drawing
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Edison's automatic telegraph, invented between 1870 and 1874, would transmit messages at 60-120 words per minute, three times faster than hand operators. There was a keyboard similar to that of a typewriter that could operate at 35 words per minute.
Source: The Thomas Edison Papers at Rutgers University
Quadruplex Telegraph
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Edison maximized profits for Western Union, who hired him in 1872, by inventing the quadruplex telegraph. Edison's version combined the duplex and diplex versions to send two simultaneous messages in the same direction. This version was used well into the 20th century.
Source: The Thomas Edison Papers at Rutgers University
Automatic Telegraph
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This is the actual completed automatic telegraph. His system was used for two years via the Automatic Telegraph Company and then for another two years through the Atlantic and Pacific Telegraph Company.
Source: The Thomas Edison Papers at Rutgers University
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