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"Light-writing telegraph" copy telegraph

Kopier-Telegraph GmbH (*1901)1905

Museum for Communication Berlin, Museum Foundation Post and Telecommunication

Museum for Communication Berlin, Museum Foundation Post and Telecommunication
Berlin, Germany

In 1901 the German physicist Gustav Grzanna developed a transmitting and receiving device that used "rays of light" to send text and hand drawings via a telephone connection in the space of 10 seconds. The position of the writing pins moved 2 reflectors in the receiver, which led a focused beam of light over photosensitive paper. Since it was developed directly in the device, the receiver could remove the photographic telegram immediately. In 1905, after only 4 years, he discontinued the production of the device.

Details

  • Title: "Light-writing telegraph" copy telegraph
  • Creator: Kopier-Telegraph GmbH (*1901)
  • Date Created: 1905
  • Location Created: Dresden, Sachsen, Deutschland
  • Rights: © Museumsstiftung Post und Telekommunikation
  • Material: Metall, Holz
  • Inventor: Gustav Grzanna (+1918)

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