Bell's telephone sketch. Drawing made by Alexander Graham Bell of his design for a telephone,comprising a mouthpiece (into which the user is speaking) and a speaker (centre right). Bell made the sketch in 1876,and his diagram reached the patent office just a few hours before the very similar telephone scheme of Elisha Gray. For Gray's sketch,see image H407/298 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 5164 px × 3468 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |