Charles Bourseul (28 April 1829 – 23 November 1912) was a pioneer in development of the "make and break" telephone about 20 years before Bell made a practical telephone. Bourseul was born in Brussels, Belgium, and grew up in Douai, France. His father was a French army officer. Charles worked for the telegraph company as a civil engineer and mechanic. He made improvements to the telegraph system of L. F. Breguet (a French instrument maker) and Samuel F. B. Morse. Charles Bourseul experimented with the electrical transmission of the human voice and developed an electromagnetic microphone, but his telephone receiver was unable to convert electric current back into clear human voice sounds.
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| - Charles Bourseul (de)
- Charles Bourseul (eo)
- Charles Bourseul (es)
- Charles Bourseul (en)
- Charles Bourseul (it)
- Charles Bourseul (fr)
- Charles Bourseul (nl)
- Charles Bourseul (sv)
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| - Charles Bourseul (* 28. April 1829 in Brüssel; † 23. November 1912 in Saint-Céré, Frankreich) war ein französischer Telegrafentechniker und Erfinder. (de)
- Charles BOURSEUL (naskiĝis la 28-an de aprilo 1829 en Bruselo, mortis la 23-an de novembro 1912 en ) estis inicianto de telefono. Kiel filo de legaciano, li komence vivis en Bruselo, baldaŭe en Douai. Baldaŭe li okupiĝis pri telegrafoj. La 26-an de aŭgusto 1854 en gazeto L'Illustration (Parizo) li publikis fakartikolon pri telefonado: "Transmission électrique de la parole" [elektra dissendo de parolado]. Tio estis skizo de membrano, per kio li sugestis la telefonadon. Li hazarde divenis, ke fera lameno tuj apud bobeno muzikadas, kaze de alterna kurento cirkuladas en cirkvito de la bobeno. En 1882 en elektroteknika kongreso Alexander Graham Bell kaj Edison omaĝis al Bourseul pro la ideo de telefono. La francoj estimas lin inventisto de telefono. (eo)
- Charles Bourseul (Bruselas, 28 de abril de 1829 - Saint-Céré, 23 de noviembre de 1912) fue un ingeniero francés, uno de los pioneros de la telefonía. Desarrolló sus investigaciones varias décadas antes de que Graham Bell patentara su invento y diez años antes de que Antonio Meucci lograra la primera llamada telefónica. (es)
- Charles Bourseul, né le 28 avril 1829 à Bruxelles et mort le 23 novembre 1912 à Saint-Céré, est un inventeur français. (fr)
- Charles Bourseul (Bruxelles, 28 aprile 1829 – Saint-Céré, 23 novembre 1912) è stato un inventore francese. (it)
- Charles Bourseul (Brussel, 28 april 1829 – Saint-Céré, 23 november 1912) was een Frans technicus die in 1854 het basisprincipe van de telefoon formuleerde. Hij wordt daarom soms genoemd als de uitvinder ervan hoewel hij geen werkend toestel wist te maken. (nl)
- Charles Bourseul, född 28 april 1829 i Bryssel i Belgien, död 23 november 1912 i Saint-Céré i Lot i Frankrike, var en fransk uppfinnare. Bourseul var telegrafinspektör i Auch. 1854 framlade han förslag till elektrisk talöverföring i telegraflinjen, enligt samma princip som blev grundläggande för den 22 år senare av Alexander Graham Bell uppfunna telefonen. Bourseuls projekt blev på sin tid avfärdat som en fantastisk tanke, men i Frankrike kom han att betraktas som telefonens verklige uppfinnare, och har i vissa facktidskrifter erkänts som sådan. (sv)
- Charles Bourseul (28 April 1829 – 23 November 1912) was a pioneer in development of the "make and break" telephone about 20 years before Bell made a practical telephone. Bourseul was born in Brussels, Belgium, and grew up in Douai, France. His father was a French army officer. Charles worked for the telegraph company as a civil engineer and mechanic. He made improvements to the telegraph system of L. F. Breguet (a French instrument maker) and Samuel F. B. Morse. Charles Bourseul experimented with the electrical transmission of the human voice and developed an electromagnetic microphone, but his telephone receiver was unable to convert electric current back into clear human voice sounds. (en)
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| - Charles Bourseul (* 28. April 1829 in Brüssel; † 23. November 1912 in Saint-Céré, Frankreich) war ein französischer Telegrafentechniker und Erfinder. (de)
- Charles BOURSEUL (naskiĝis la 28-an de aprilo 1829 en Bruselo, mortis la 23-an de novembro 1912 en ) estis inicianto de telefono. Kiel filo de legaciano, li komence vivis en Bruselo, baldaŭe en Douai. Baldaŭe li okupiĝis pri telegrafoj. La 26-an de aŭgusto 1854 en gazeto L'Illustration (Parizo) li publikis fakartikolon pri telefonado: "Transmission électrique de la parole" [elektra dissendo de parolado]. Tio estis skizo de membrano, per kio li sugestis la telefonadon. Li hazarde divenis, ke fera lameno tuj apud bobeno muzikadas, kaze de alterna kurento cirkuladas en cirkvito de la bobeno. En 1882 en elektroteknika kongreso Alexander Graham Bell kaj Edison omaĝis al Bourseul pro la ideo de telefono. La francoj estimas lin inventisto de telefono. (eo)
- Charles Bourseul (28 April 1829 – 23 November 1912) was a pioneer in development of the "make and break" telephone about 20 years before Bell made a practical telephone. Bourseul was born in Brussels, Belgium, and grew up in Douai, France. His father was a French army officer. Charles worked for the telegraph company as a civil engineer and mechanic. He made improvements to the telegraph system of L. F. Breguet (a French instrument maker) and Samuel F. B. Morse. Charles Bourseul experimented with the electrical transmission of the human voice and developed an electromagnetic microphone, but his telephone receiver was unable to convert electric current back into clear human voice sounds. In 1854 Bourseul wrote a memorandum on the transmission of the human voice by electric currents that was first published in a magazine L'Illustration (Paris), though no prototype was built. That is about the same time that Meucci later claimed to have created his first attempt at the telephone in Italy. Bourseul explained: “Suppose a man talks near a moving disc that is flexible enough not to lose any of the vibrations of the voice, and that this disc periodically interrupts the current of a battery; then, at a certain distance, we could have another disc that simultaneously executes the same vibrations. The passage of an electric current through a metal wire transforms into a magnet a piece of soft iron placed in the vicinity of the wire. As soon as the current stops, the soft iron is demagnetized. This magnet, the electromagnet, can thus alternatively attract or repel a metal plate. It would be perfectly possible to arrange this second metal plate, so as to make it repeat the same vibrations as the first; this result would be exactly the same as if the person had spoken in the immediate vicinity against this second plate. In other words, the ear would be affected, as if the sounds had reached it directly through the first metal disc. [...] It is certain that, in a more or less distant future, speech will be transmitted by electricity. I have made experiments in this direction; they are delicate and demand time and patience, but the approximations obtained promise a favourable result.” Bourseul died in Saint-Céré, France, at the age of 83. (en)
- Charles Bourseul (Bruselas, 28 de abril de 1829 - Saint-Céré, 23 de noviembre de 1912) fue un ingeniero francés, uno de los pioneros de la telefonía. Desarrolló sus investigaciones varias décadas antes de que Graham Bell patentara su invento y diez años antes de que Antonio Meucci lograra la primera llamada telefónica. (es)
- Charles Bourseul, né le 28 avril 1829 à Bruxelles et mort le 23 novembre 1912 à Saint-Céré, est un inventeur français. (fr)
- Charles Bourseul (Bruxelles, 28 aprile 1829 – Saint-Céré, 23 novembre 1912) è stato un inventore francese. (it)
- Charles Bourseul (Brussel, 28 april 1829 – Saint-Céré, 23 november 1912) was een Frans technicus die in 1854 het basisprincipe van de telefoon formuleerde. Hij wordt daarom soms genoemd als de uitvinder ervan hoewel hij geen werkend toestel wist te maken. (nl)
- Charles Bourseul, född 28 april 1829 i Bryssel i Belgien, död 23 november 1912 i Saint-Céré i Lot i Frankrike, var en fransk uppfinnare. Bourseul var telegrafinspektör i Auch. 1854 framlade han förslag till elektrisk talöverföring i telegraflinjen, enligt samma princip som blev grundläggande för den 22 år senare av Alexander Graham Bell uppfunna telefonen. Bourseuls projekt blev på sin tid avfärdat som en fantastisk tanke, men i Frankrike kom han att betraktas som telefonens verklige uppfinnare, och har i vissa facktidskrifter erkänts som sådan. (sv)
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