Early telephone by Alexander Graham Bell, c 1870s.

 
Early telephone by Alexander Graham Bell, c 1870s.
4 0 c m
 
34cm
actual image size: 26cm x 32cm

Description

This box telephone, which was previously used at Lloyds signal station in Crookhaven, represents one of Alexander Graham Bell's (1847-1922) earliest efforts to design a device that would allow long distance communication. Bell's central idea, in this and later designs, was to convert the vibrations of the human voice into electrical signals that could be sent over a wire from one telephone user to another. On 7 March 1876, Bell secured a patent for his invention, and later that year gave a public demonstration of the first telephone at the American Centennial Exhibition in Philadelphia. This design, used for both the transmitter and receiver, became standard when the first telephones were introduced on the market in 1877. Overhead view.

© Science Museum / Science & Society Picture Library

buy a print

Select size
 
Select finish
 
How many prints?
 
£20.00
 

buy a framed print

buy a canvas

buy a framed canvas

image details