Search results
Results from the WOW.Com Content Network
When he returned to Ohio, he became an engineer with the Dayton and Southwestern Railroad in southwestern Ohio. He moved to Cincinnati, Ohio in 1880, and established his business as an electrical engineer and an inventor. After receiving the multiplex telegraph patent, he reorganized his Cincinnati company as the Woods Electric Co.
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).
The electric telegraph led to Guglielmo Marconi's invention of wireless telegraphy, the first means of radiowave telecommunication, which he began in 1894. [5] In the early 20th century, manual operation of telegraph machines was slowly replaced by teleprinter networks.
From Machine Shop to Industrial Laboratory: Telegraphy and the Changing Context of American Invention, 1830–1920 (Johns Hopkins UP, 1992). Jepsen, Thomas C. My Sisters Telegraphic: Women in the Telegraph Office, 1846–1950 (Ohio UP, 2000). John, Richard R. Network Nation: Inventing American Telecommunications (Harvard UP, 2010) excerpt; Kern ...
January 22, 1848 map in New York Herald showing extent of existing and planned North American telegraph lines. At this time, the service area for the United States reached Petersburg, Virginia in the south, Portland, Maine in the northeast, Cleveland, Ohio in the northwest, and as far west as East St. Louis, Illinois.
The telephone emerged from the making and successive improvements of the electrical telegraph. In 1804, Spanish polymath and scientist Francisco Salva Campillo constructed an electrochemical telegraph. [7] The first working telegraph was built by the English inventor Francis Ronalds in 1816 and used static electricity. [8]
The Cooke and Wheatstone telegraph was an early electrical telegraph system dating from the 1830s invented by English inventor William Fothergill Cooke and English scientist Charles Wheatstone. It was a form of needle telegraph , and the first telegraph system to be put into commercial service.
He invented a precursor to the electric doorbell (specifically a bell that could be rung at a distance via an electric wire, 1831) [7] and electric relay (1835). [8] His work on the electromagnetic relay was the basis of the practical electrical telegraph, invented separately by Samuel F. B. Morse and Sir Charles Wheatstone.