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edison - Thomas Alva Edison Thomas Alva Edison Born Feb 11...

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Thomas Alva Edison
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Thomas Alva Edison Born Feb. 11, 1847 Milan, Ohio Youngest of 7 Children Home tutored by mother Three months of formal schooling Had his own chemical lab at age 11
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Jobs Held Progress hindered Deaf in one ear First job at 12 News boy Moved to Boston to work for Western Union Worked 20-24 hr. days to build lab. Menlo Park, NJ
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Significant Inventions Practical Light Bulb Electric Generating System Phonograph Motion Picture Projector Stock Ticker 46 patents Improvements of stock tickers Duplex Telegraphy
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Telephone Transmitter First major work in Menlo Park More practical than Bell’s telephone Transmitter used carbon microphone Connected to a series of batteries Produced a stronger signal Could carry messages clearly 107 miles
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Phonograph Recorded sound mechanically tin foil cylinder Suggested uses dictation for letter writing
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