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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. Wire telegraphone in which piano wire was used for the recording. 1904.
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Titel:
TELEGRAPHONE: magnetic recording tele phone invented by Valdemar Poulsen (1869-1942).
Untertitel: Siehe automatische Übersetzung
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. Wire telegraphone in which piano wire was used for the recording. 1904.
Bildnachweis:
Album / World History Archive
Freigaben (Releases):
Model: Nein - Eigentum: Nein
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Bildgröße:
9151 x 6875 px | 180.0 MB
Druckgröße:
77.5 x 58.2 cm | 30.5 x 22.9 in (300 dpi)
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