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Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman. [ 1 ] [ 2 ] [ 3 ] He developed many devices in fields such as electric power generation , mass communication , sound recording , and motion pictures. [ 4 ]
In 1883, Edward H. Johnson, a business associate of Edison, persuaded Frank J. Sprague to work for Edison. One of Sprague's significant contributions to the Edison Laboratory was the introduction of mathematical methods [citation needed]. U.S. patent 0,248,433 – Vacuum Apparatus (1881) U.S. patent 0,248,434 – Governor for Electric Engines
Thomas A. Edison, Incorporated (originally the National Phonograph Company) was the main holding company for the various manufacturing companies established by the inventor and entrepreneur Thomas Edison. It was a successor to Edison Manufacturing Company and operated between 1911 and 1957, when it merged with McGraw Electric to form McGraw-Edison.
The war of the currents was a series of events surrounding the introduction of competing electric power transmission systems in the late 1880s and early 1890s. It grew out of two lighting systems developed in the late 1870s and early 1880s; arc lamp street lighting running on high-voltage alternating current (AC), and large-scale low-voltage direct current (DC) indoor incandescent lighting ...
The Thomas Alva Edison Birthplace is in a formerly residential (now a museum complex) area north of downtown Milan, on the west side of North Edison Drive. It is a small 1 + 1 ⁄ 2-story brick building, with a gabled roof and two end chimneys. The main facade is five bays wide, with the entrance at the center, topped by a four-light transom ...
On September 5, 1962, the 21-acre (85,000 m 2) site containing the home and the laboratory were designated the Edison National Historic Site. [2] On March 30, 2009, it was renamed Thomas Edison National Historical Park, adding "Thomas" to the title in hopes to relieve confusion between the Edison sites in West Orange and Edison, New Jersey ...