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U.S. patent 0,222,881 – Magneto-Electric Machines : Edison main dynamo. The device's nickname was the "long-legged Mary-Ann". This device has large bipolar magnets and is highly inefficient. U.S. patent 0,223,898 – Electric Lamp : Edison's incandescent light bulb invention. The original spiral carbon-filament is shown and repeatedly ...
Edison in 1861. Thomas Edison was born in 1847 in Milan, Ohio, but grew up in Port Huron, Michigan, after the family moved there in 1854. [8] He was the seventh and last child of Samuel Ogden Edison Jr. (1804–1896, born in Marshalltown, Nova Scotia) and Nancy Matthews Elliott (1810–1871, born in Chenango County, New York).
Edison described it as a scientific toy. [5] A U.S patent application was filed for the "Vocal Engine" in 1878, and a patent was granted on December 10 of that year. [ 6 ] An 1884 Nature article on sound mills , similar devices to the phonomotor, reported that Edison's device, "literally accomplished the feat of talking a hole through a deal ...
Thomas Edison, half-length portrait, facing left and looking down into glass, experimenting in his laboratory: Date: circa 1920 . Source : This image is available ...
Thomas Edison discovers thermionic emission. This effect forms the basis for the vacuum tube and the cathode ray tube. approximately 1893: The selenium phototube invention allows the conversion of brightness values into electrical signals.
Sheet of images from one of the three Monkeyshines films (c. 1889–90) produced as tests of an early version of the Kinetoscope. An encounter with the work and ideas of photographic pioneer Eadweard Muybridge appears to have spurred Thomas Edison to pursue the development of a motion picture system.
Getty By Jacquelyn Smith The job interview was born in 1921, when Thomas Edison created a written test to evaluate job candidates' knowledge. Since then, the process has come a long way. "As the ...
The complete duplicating outfit including Edison's electric pen. Thomas Edison's electric pen, part of a complete outfit for duplicating handwritten documents and drawings, was the first relatively safe electric-motor-driven office appliance produced and sold in the United States.