Thomas Edison

(Thomas Alva Edison)

American Inventor, Businessman, Scientist

Date of Birth: February 11, 1847
Date of Death: October 18, 1931

Nationality: American

Edison, chagrined, learned his lesson. After that, he decided never to invent anything unless he was sure it would be needed and wanted and not merely because it worked. He stuck to that. Before he died, he had obtained nearly 1,300 patents -300 of them over a four-year stretch, or one every five days, on the average. Always he was guided by his notion of the useful and the practical. On October 21, 1879, he produced the first practical electric light, perhaps the most astonishing of all his inventions. (We need only sit by candle light for a while during a power breakdown to discover how much we take for granted the electric light.) In succeeding years, Edison labored to improve the electric light and, mainly, to find ways of making the glowing filament last longer before breaking. As was usual with him, he tried everything he could think of. One of this hit-or-miss efforts was to seal a metal wire into the evacuated electric light bulb, near the filament but not couching it. The two were separated by a small gap of vacuum. - Is Science Useful by Isaac Asimov
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Thomas Edison

(Thomas Alva Edison)

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