Telephone-telegraph invention,artwork

Numéro d’image : 11643347
Telephone-telegraph invention,artwork
Telephone-telegraph invention. Artwork of a telegraph key (orange) and a coiled strip of paper tape,labelled 'think differently!'. This represents how inventions can arise when thinking differently about the technology previously in use. The development of electric telegraphy from the 1830s led to the creation of a large telecommunication network based on punched paper tape records. It was not thought that there was any need to transmit sound and voices,until Alexander Graham Bell and others invented telephone technology in the 1870s
Licence : Droits gérés
Crédit: Science Photo Library / Goodwin, Glyn
Taille de l’image : 3321 px × 2657 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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