Double-sided telegraph used for training operators, 1870-1930.

Double-sided telegraph used for training operators, 1870-1930.
3 3 c m
40cm
actual image size: 32cm x 25cm

Description

Dummy double-sided single-needle telegraph used for training operators. By about 1870 needle telegraphs in Britain had standardised on the Morse code, where a movement of the needle to the left indicated a dot, and, to the right, a dash. This simple instrument was developed to train and test operators in the code and uses simple mechanical linkages to work the needles.

Image Details

Image Ref.
 
10459343

© 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