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TELEGRAPHONE: magnetic recording tele phone invented by Valdemar Poulsen (1869-1942).

TELEGRAPHONE: magnetic recording tele phone invented by Valdemar Poulsen (1869-1942). He applied for a patent on 1 December 1898; and the instrument aroused great interest at the Paris Exposition of 1900. RIBBON TELEGRAPHONE: detail of thin steel ribbon mounted on pulleys.
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Title: TELEGRAPHONE: magnetic recording tele phone invented by Valdemar Poulsen (1869-1942).
Caption: TELEGRAPHONE: magnetic recording tele phone invented by Valdemar Poulsen (1869-1942). He applied for a patent on 1 December 1898; and the instrument aroused great interest at the Paris Exposition of 1900. RIBBON TELEGRAPHONE: detail of thin steel ribbon mounted on pulleys.
Credit: Album / World History Archive
Releases: ? Model Release: No - ? Property Release: No
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Image size: 11114 × 5661 px | 180.0 MB
Print size: 94.1 × 47.9 cm | 4375.6 × 2228.7 in (300 dpi)
Keywords: 1900 • 19TH CENTURY • MAGNETIC • MOUNTED PULLEYS • PARIS EXPOSITION • RECORDING • RIBBON TELEGRAPHONE • STEEL RIBBON • TELEGRAPHONE • TELEPHONE • VALDEMAR POULSEN