Valdemar Poulsen
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Valdemar Poulsen was a Danish engineer and inventor who developed a magnetic wire recorder called the telegraphone in 1898. He also made significant contributions to early radio technology, including
Valdemar Poulsen (c. 1898)
Poulsen's magnetic wire recorder
Poulsen's 1900 US patent for a magnetic wire recorder
"Telephonograph after Poulsen, for permanently fixing and conveniently repeating a telephonic conversation." From a 1911 catalog of physical apparatuses.
Franz Joseph I
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Franz Joseph I or Francis Joseph I was Emperor of Austria, King of Hungary, and the ruler of the other states of the Habsburg monarchy from 2 December 1848 until his death in 1916. In the early part o
Valdemar Poulsen
…or transmitted on telephone wires. At the 1900 Exposition Universelle in Paris, Poulsen demonstrated the invention, and recorded the voice of Emperor Franz Josef of Austria which is believed to be the oldest surviving magnetic audio recording. It was anticipated that the Telegraphone would have numerous applications for…
Formal portrait, 1910
Franz Joseph with his mother Archduchess Sophie, by Joseph Karl Stieler
Franz Joseph's family gathered in prayer, 1839
The Battle of Győr on 28 June 1849. Franz Joseph enters Győr leading the Austrian troops.