Téléphone de Bell, l'émetteur et le récepteur, 1876

• Contributeur: Science History Images / Alamy Banque D'Images
• ID de l’image: T7YTXN
• Taille du fichier: 15 MB (426,2 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 3873 x 1354 px | 32,8 x 11,5 cm | 12,9 x 4,5 inches | 300dpi
• Date de la prise de vue: 21 février 2014
• Photographe: Science History Images

Informations supplémentaires

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

Historical artwork of Alexander Graham Bell's first telephone transmitter (left) and receiver (right). Patented in 1876, it used existing telegraph lines to transmit and receive sound. The mouthpiece (far left) doubled as the earpiece for the call's receiver, but this two way system was later improved as it was not practical to speak and listen concurrently. Bell was born in Scotland in 1847, emigrating to Massachusetts, USA, where he worked on a system to teach deaf mutes to speak. He also patented a system to send more than one message at a time along existing telegraphic systems. It was this improvement that lead him to invent the telephone.

Recherche dans la banque de photos par tags

• 1876
• 19thc century
• alexander bell
• alexander g bell
• alexander graham bell
• américain
• amérique
• années1800
• appareil électroménager
• xixème siècle